阅读说明：本技术 车辆的增程器控制方法、装置、终端及存储介质 (Range extender control method and device for vehicle, terminal and storage medium ) 是由 王多衎 蔡文远 王荣华 崔俊博 刘中拥 李楠 朱龙锋 于 2020-04-26 设计创作，主要内容包括：本发明公开了一种车辆的增程器控制方法、装置、终端及存储介质,所述的方法包括：获取车辆的多个待处理数据；将各待处理数据与对应的预设条件进行匹配,获得匹配结果；当多个待处理数据中存在至少两个待处理数据的匹配结果为匹配成功时,根据预设条件与控制策略的对应关系,获取与各匹配成功的待处理数据所匹配的预设条件对应的控制策略,将获取的各控制策略作为预选控制策略；计算各预选控制策略下增程器的输出功率,得到包含多个输出功率的数据集合；从所述数据集合中确定目标输出功率；将所述目标输出功率对应的预选控制策略作为目标控制策略；基于所述目标控制策略控制所述增程器启动；本发明使得增程器运行在高效区,降低油耗消耗。(The invention discloses a method, a device, a terminal and a storage medium for controlling a range extender of a vehicle, wherein the method comprises the following steps: acquiring a plurality of data to be processed of a vehicle; matching each data to be processed with corresponding preset conditions to obtain a matching result; when the matching result of at least two pieces of data to be processed in the plurality of pieces of data to be processed is successful, acquiring a control strategy corresponding to the preset condition matched with each piece of successfully matched data to be processed according to the corresponding relation between the preset condition and the control strategy, and taking each acquired control strategy as a preselected control strategy; calculating the output power of the range extender under each preselected control strategy to obtain a data set containing a plurality of output powers; determining a target output power from the data set; taking a preselected control strategy corresponding to the target output power as a target control strategy; controlling the range extender to start based on the target control strategy; the invention enables the range extender to operate in a high-efficiency area, and reduces oil consumption.)

1. A method for controlling a range extender of a vehicle, characterized by: the method comprises the following steps:

acquiring a plurality of data to be processed of a vehicle;

matching each data to be processed with corresponding preset conditions to obtain a matching result;

when the matching result of at least two pieces of data to be processed in the plurality of pieces of data to be processed is successful, acquiring a control strategy corresponding to the preset condition matched with each piece of successfully matched data to be processed according to the corresponding relation between the preset condition and the control strategy, and taking each acquired control strategy as a preselected control strategy;

calculating the output power of the range extender under each preselected control strategy to obtain a data set containing a plurality of output powers;

determining a target output power from the data set;

taking a preselected control strategy corresponding to the target output power as a target control strategy;

controlling the range extender to start based on the target control strategy.

2. The range extender control method of a vehicle according to claim 1, characterized in that: the acquiring a plurality of data to be processed of the vehicle comprises the following steps:

acquiring the current actual required power of the vehicle, the current residual capacity of the battery, the current battery core temperature and the accelerator pedal opening change rate of the vehicle in a preset time period;

obtaining the current target discharge power of the battery according to the current residual electric quantity of the battery and the current battery core temperature;

obtaining the average required power of the vehicle according to the actual required power and a preset step length;

taking the difference between the current discharging power of the battery and the average required power of the vehicle as first data to be processed;

taking the current residual capacity of the battery as second data to be processed;

and taking the accelerator pedal opening change rate of the vehicle in the preset time period as third data to be processed.

3. The range extender control method of a vehicle according to claim 2, characterized in that: when the difference between the current discharge power of the battery and the average required power of the vehicle is used as first data to be processed, matching each data to be processed with a corresponding preset condition to obtain a matching result, including:

judging whether the difference between the current discharge power of the battery and the average required power of the vehicle is smaller than a preset first threshold value or not;

if yes, the first to-be-processed data is judged to be successfully matched with a first preset condition, and the difference between the current discharging power of the battery and the average required power of the vehicle is smaller than a preset first threshold value to serve as a first matching result of successful matching.

4. The range extender control method of a vehicle according to claim 3, characterized in that: after the difference between the current discharging power of the battery and the average required power of the vehicle is determined to be smaller than a preset first threshold, the method further comprises the following steps:

acquiring a first control strategy corresponding to a first preset condition;

acquiring a first preset power of the range extender under the first control strategy and a preset output power threshold of the battery;

judging whether the average required power of the vehicle is greater than the first preset power or not and whether the current remaining capacity of the battery is greater than a preset second threshold or not;

and if so, determining the output power of the range extender according to the average required power of the vehicle and a preset output power threshold of the battery.

5. The range extender control method of a vehicle according to claim 2, characterized in that: when the current remaining capacity of the battery is used as second to-be-processed data, matching each to-be-processed data with a corresponding preset condition to obtain a matching result, wherein the matching result comprises:

judging whether the current residual capacity of the battery is within a preset residual capacity interval or not;

if so, judging that the second to-be-processed data is successfully matched with a second preset condition, and taking the current residual capacity of the battery in a preset residual capacity interval as a second matching result of successful matching.

6. The range extender control method of a vehicle according to claim 5, characterized in that: after the current remaining capacity of the battery is determined to be within a preset remaining capacity interval, the method further includes:

acquiring a second control strategy matched with a second preset condition;

acquiring the oil consumption data of the engine and the working efficiency of a vehicle system under the second control strategy;

determining an efficient working area of the engine according to the oil consumption data of the engine and the working efficiency of the vehicle system;

obtaining the efficiency of the range extender, the charging and discharging efficiency of a battery and the charging energy proportion of the range extender;

and based on the efficient working area of the engine, determining the output power of the range extender according to the efficiency of the range extender, the charging and discharging efficiency of the battery and the charging energy proportion of the range extender.

7. The range extender control method of a vehicle according to claim 2, characterized in that: when the accelerator pedal opening degree change rate of the vehicle in the preset time period is used as third data to be processed, matching each data to be processed with a corresponding preset condition to obtain a matching result, wherein the matching result comprises:

judging whether the accelerator pedal opening change rate is larger than a preset third threshold value or not;

if so, judging that the third to-be-processed data is successfully matched with a third preset condition, and taking the accelerator pedal opening change rate larger than a preset third threshold value as a third matching result of successful matching.

8. A range extender control device for a vehicle, characterized in that: the device comprises:

the system comprises a to-be-processed data acquisition module, a processing module and a processing module, wherein the to-be-processed data acquisition module is used for acquiring a plurality of to-be-processed data of a vehicle;

the matching module is used for matching each piece of data to be processed with the corresponding preset condition to obtain a matching result;

the control strategy acquisition module is used for acquiring a control strategy corresponding to a preset condition matched with each successfully matched data to be processed according to the corresponding relation between the preset condition and the control strategy when the matching result of at least two data to be processed in the plurality of data to be processed is successful, and taking each acquired control strategy as a preselected control strategy;

the data set acquisition module is used for calculating the output power of the range extender under each preselected control strategy to obtain a data set containing a plurality of output powers;

a target output power determination module for determining a target output power from the data set;

the target control strategy determining module is used for taking a preselected control strategy corresponding to the target output power as a target control strategy;

and the range extender starting control module is used for controlling the starting of the range extender based on the target control strategy.

9. A range extender control terminal of a vehicle, characterized in that: the terminal comprises a processor and a memory;

the memory storing one or more instructions adapted to be loaded and executed by the processor to implement the range extender control method of a vehicle of any of claims 1 to 7.

10. A computer-readable storage medium characterized by: the storage medium has stored therein at least one instruction, at least one program, a set of codes, or a set of instructions that is loaded and executed by a processor to implement a range extender control method of a vehicle as claimed in any one of claims 1-7.

Technical Field

The invention relates to the technical field of range extending automobile control, in particular to a method, a device, a terminal and a storage medium for controlling a range extender of a vehicle.

Background

Energy conservation and emission reduction become two major problems and challenges for the development of the automobile industry, the electric automobile which is in due view certainly becomes the mainstream development direction of the automobile industry, and the pure electric automobile has the problems of short endurance mileage, suspected pollution transfer and the like in use due to the current battery technology level. Hybrid vehicles combining an internal combustion engine and an electric motor have become an ideal technical route in this context, including extended range electric vehicles.

The development of extended range electric vehicles is mainly hindered by cost and energy conversion energy consumption. With the development and investment of the electric automobile industry, the cost is greatly reduced, so that the improvement of the system efficiency of the range extender and the matching of an effective power control strategy become the main research direction of the range extender electric automobile.

At present, the range-extended electric automobile is generally matched with the existing engine with small displacement, small volume and low oil consumption, mainly from the aspects of development period, cost and arrangement, the development and matching of the range extender are usually neglected, the purpose that the range extender operates in a high-efficiency area can be achieved only by selecting the engine to operate at a high rotating speed, and the trade-off between economy and NVH performance is difficult.

Disclosure of Invention

In order to solve the technical problem, aiming at the problem, the invention discloses a range extender control method of a vehicle, which comprises the steps of obtaining a plurality of data to be processed of the vehicle; matching the data to be processed with corresponding preset conditions to obtain matching results and the corresponding relation between the preset conditions and the control strategies, and acquiring preselected control strategies; and selecting the target output power and the target control strategy corresponding to the target output power from the output powers of the range extender under the multiple preselected control strategies, and controlling the range extender to start according to the target control strategy, so that the range extender operates in a high-efficiency area, the oil consumption is reduced, and the NVH performance improvement, the power responsiveness and the economy are facilitated.

In order to achieve the above object, the present invention provides a method for controlling a range extender of a vehicle, the method comprising:

acquiring a plurality of data to be processed of a vehicle;

matching each data to be processed with corresponding preset conditions to obtain a matching result;

when the matching result of at least two pieces of data to be processed in the plurality of pieces of data to be processed is successful, acquiring a control strategy corresponding to the preset condition matched with each piece of successfully matched data to be processed according to the corresponding relation between the preset condition and the control strategy, and taking each acquired control strategy as a preselected control strategy;

calculating the output power of the range extender under each preselected control strategy to obtain a data set containing a plurality of output powers;

determining a target output power from the data set;

taking a preselected control strategy corresponding to the target output power as a target control strategy;

controlling the range extender to start based on the target control strategy.

Further, the acquiring a plurality of data to be processed of the vehicle includes:

acquiring the current actual required power of the vehicle, the current residual capacity of the battery, the current battery core temperature and the accelerator pedal opening change rate of the vehicle in a preset time period;

obtaining the current target discharge power of the battery according to the current residual electric quantity of the battery and the current battery core temperature;

obtaining the average required power of the vehicle according to the actual required power and a preset step length;

taking the difference between the current discharging power of the battery and the average required power of the vehicle as first data to be processed;

taking the current residual capacity of the battery as second data to be processed;

and taking the accelerator pedal opening change rate of the vehicle in the preset time period as third data to be processed.

Further, when the difference between the current discharge power of the battery and the average required power of the vehicle is used as the first to-be-processed data, the matching between each to-be-processed data and the corresponding preset condition is performed to obtain a matching result, including:

judging whether the difference between the current discharge power of the battery and the average required power of the vehicle is smaller than a preset first threshold value or not;

if yes, the first to-be-processed data is judged to be successfully matched with a first preset condition, and the difference between the current discharging power of the battery and the average required power of the vehicle is smaller than a preset first threshold value to serve as a first matching result of successful matching.

Further, after determining that the difference between the current discharge power of the battery and the average required power of the vehicle is smaller than a preset first threshold, the method further comprises:

acquiring a first control strategy corresponding to a first preset condition;

acquiring a first preset power of the range extender under the first control strategy and a preset output power threshold of the battery;

judging whether the average required power of the vehicle is greater than the first preset power or not and whether the current remaining capacity of the battery is greater than a preset second threshold or not;

and if so, determining the output power of the range extender according to the average required power of the vehicle and a preset output power threshold of the battery.

Further, when the current remaining capacity of the battery is used as second to-be-processed data, the matching of each to-be-processed data with a corresponding preset condition is performed to obtain a matching result, and the matching result includes:

judging whether the current residual capacity of the battery is within a preset residual capacity interval or not;

if so, judging that the second to-be-processed data is successfully matched with a second preset condition, and taking the current residual capacity of the battery in a preset residual capacity interval as a second matching result of successful matching.

Further, after determining that the current remaining power of the battery is within the preset remaining power interval, the method further includes:

acquiring a second control strategy matched with a second preset condition;

acquiring the oil consumption data of the engine and the working efficiency of a vehicle system under the second control strategy;

determining an efficient working area of the engine according to the oil consumption data of the engine and the working efficiency of the vehicle system;

obtaining the efficiency of the range extender, the charging and discharging efficiency of a battery and the charging energy proportion of the range extender;

and based on the efficient working area of the engine, determining the output power of the range extender according to the efficiency of the range extender, the charging and discharging efficiency of the battery and the charging energy proportion of the range extender.

Further, when the accelerator pedal opening degree change rate of the vehicle in the preset time period is used as third data to be processed, the matching of each data to be processed and the corresponding preset condition is performed to obtain a matching result, including:

judging whether the accelerator pedal opening change rate is larger than a preset third threshold value or not;

if so, judging that the third to-be-processed data is successfully matched with a third preset condition, and taking the accelerator pedal opening change rate larger than a preset third threshold value as a third matching result of successful matching.

The invention provides a range extender control device of a vehicle, which comprises: the system comprises a to-be-processed data acquisition module, a processing module and a processing module, wherein the to-be-processed data acquisition module is used for acquiring a plurality of to-be-processed data of a vehicle;

the matching module is used for matching each piece of data to be processed with the corresponding preset condition to obtain a matching result;

the control strategy acquisition module is used for acquiring a control strategy corresponding to a preset condition matched with each successfully matched data to be processed according to the corresponding relation between the preset condition and the control strategy when the matching result of at least two data to be processed in the plurality of data to be processed is successful, and taking each acquired control strategy as a preselected control strategy;

the data set acquisition module is used for calculating the output power of the range extender under each preselected control strategy to obtain a data set containing a plurality of output powers;

a target output power determination module for determining a target output power from the data set;

the target control strategy determining module is used for taking a preselected control strategy corresponding to the target output power as a target control strategy;

and the range extender starting control module is used for controlling the starting of the range extender based on the target control strategy.

The invention provides a range extender control terminal of a vehicle, which comprises a processor and a memory;

the memory stores one or more instructions suitable for being loaded and executed by the processor to realize the range extender control method of the vehicle.

The present invention provides a computer readable storage medium having stored therein at least one instruction, at least one program, set of codes, or set of instructions, which is loaded and executed by a processor to implement a range extender control method for a vehicle as described above.

The embodiment of the invention has the following beneficial effects:

the invention discloses a control method of a range extender of a vehicle, which comprises the steps of obtaining a plurality of data to be processed of the vehicle; matching the data to be processed with corresponding preset conditions to obtain matching results and the corresponding relation between the preset conditions and the control strategies, and acquiring preselected control strategies; and selecting the target output power and the target control strategy corresponding to the target output power from the output power of the range extender under the multiple preselected control strategies, and controlling the start of the range extender according to the target control strategy, so that the range extender operates in a high-efficiency area, the oil consumption is reduced, and the NVH performance improvement, the power responsiveness and the economy are facilitated.

Drawings

In order to more clearly illustrate the method, the device, the terminal and the storage medium for controlling the range extender of the vehicle according to the present invention, the drawings required by the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a flowchart illustrating a method for controlling a range extender of a vehicle according to an embodiment of the present invention;

fig. 2 is a schematic flowchart of a method for obtaining an output power of a range extender under a first control strategy according to an embodiment of the present invention;

fig. 3 is a schematic flowchart of a method for obtaining an output power of a range extender under a second control strategy according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart illustrating a method for controlling a range extender of a vehicle according to a first control strategy provided by an embodiment of the present invention;

FIG. 5 is a flowchart illustrating a method for controlling a range extender of a vehicle according to a second control strategy provided by an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a range extender control device of a vehicle according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a range extender control terminal of a vehicle according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention can be applied to the field of starting control of range extenders in range-extended electric vehicles, and particularly, the range extender is controlled to start by selecting the optimal target control strategy from control strategies obtained by calculating and processing various data to be processed and various data to be processed during the running process of a vehicle, and the target output power corresponding to the target control strategy is used as the starting request power of the range extender, so that the range extender runs in a high-efficiency area, and the oil consumption is reduced.

Referring to fig. 1, which is a flowchart illustrating a method for controlling a range extender of a vehicle according to an embodiment of the present invention, the present specification provides the method steps according to the embodiment or the flowchart, but based on the conventional method; or the inventive process may include additional or fewer steps. The sequence of steps recited in the embodiments is only one of the execution sequences of the steps, and does not represent the only execution sequence, and the range extender control method of the vehicle in the present application may be executed according to the method sequence shown in the embodiments or the figures. Specifically, as shown in fig. 1, the method includes:

s101, acquiring a plurality of data to be processed of a vehicle;

it should be noted that, in the embodiment of the present specification, the data to be processed may be operation data of the extended range electric vehicle; preferably, the plurality of pieces of data to be processed may be three pieces of data to be processed.

Specifically, in the embodiment of the present specification, acquiring a plurality of pieces of data to be processed of a vehicle includes:

s1, acquiring the current actual required power of the vehicle, the current residual capacity of the battery, the current battery cell temperature and the accelerator pedal opening change rate of the vehicle in a preset time period;

in the embodiment of the present specification, the current actual required power of the vehicle may be the real-time required power of the vehicle;

in the embodiment of the present specification, acquiring the accelerator pedal opening change rate of the vehicle in the preset time period includes:

collecting the opening degree of an accelerator pedal of the whole vehicle within a preset time period; and obtaining the opening degree change rate of the accelerator pedal of the vehicle according to the opening degree of the accelerator pedal of the whole vehicle and a preset time period.

S2, obtaining the current target discharge power of the battery according to the current residual capacity of the battery and the current battery core temperature;

in the embodiment of the present specification, the current target discharge power of the battery may be the current maximum allowable discharge power of the battery;

s3, obtaining the average required power of the vehicle according to the actual required power and a preset step length;

in the embodiment of the specification of the vehicle in the preset time period, the preset step length may be a fixed step length; for example, the average power is obtained by taking a fixed step length of every 4s, namely t1-t4 as a step length, and an average power P is obtained according to the power P1-P4 at each time in the time period of t1-t 4; t2-t5 is also a step size, and thus an average power is obtained.

S4a, taking the difference between the current discharging power of the battery and the average required power of the vehicle as first data to be processed;

s4b, using the current residual capacity of the battery as second data to be processed;

and S4c, taking the accelerator pedal opening change rate as third data to be processed.

S103, matching each data to be processed with a corresponding preset condition to obtain a matching result;

a1. in this embodiment of the present specification, when a difference between a current discharge power of the battery and an average required power of the vehicle is used as first data to be processed, the matching each data to be processed with a corresponding preset condition to obtain a matching result includes:

judging whether the difference between the current discharge power of the battery and the average required power of the vehicle is smaller than a preset first threshold value or not;

if yes, the first to-be-processed data is judged to be successfully matched with a first preset condition, and the difference between the current discharging power of the battery and the average required power of the vehicle is smaller than a preset first threshold value to serve as a first matching result of successful matching.

Specifically, in the embodiment of the present specification, the first preset condition corresponding to the first to-be-processed data may be that a difference between the current discharge power of the battery and the average required power of the vehicle is smaller than a preset first threshold.

a2. When the matching result of the first to-be-processed data and the first preset condition is that the matching is successful, that is, the difference between the current discharging power of the battery and the average required power of the vehicle is smaller than a preset first threshold value.

In this embodiment of the present specification, when the current remaining power of the battery is used as the second to-be-processed data, the matching between each to-be-processed data and the corresponding preset condition to obtain a matching result includes:

judging whether the current residual capacity of the battery is within a preset residual capacity interval or not;

if so, judging that the second to-be-processed data is successfully matched with a second preset condition, and taking the current residual capacity of the battery in a preset residual capacity interval as a second matching result of successful matching.

Specifically, in the embodiment of the present specification, the second preset condition corresponding to the second to-be-processed data may be that the current remaining power of the battery is within a preset remaining power interval;

the preset remaining power interval may be set in each section by adopting a hysteresis setting mode according to the electrical property of the battery, for example, the current remaining power of the battery may be divided into sections [ a-b ], [ c-d ], [ e-f ], and the like, and each section is correspondingly provided with the constant output power of the range extender.

a3. In this embodiment of the specification, when the accelerator pedal opening degree change rate of the vehicle in the preset time period is taken as the third data to be processed, the matching between each data to be processed and the corresponding preset condition to obtain the matching result includes:

judging whether the accelerator pedal opening change rate is larger than a preset third threshold value or not;

if so, judging that the third to-be-processed data is successfully matched with a third preset condition, and taking the accelerator pedal opening change rate larger than a preset third threshold value as a third matching result of successful matching.

Specifically, in the embodiment of the present specification, the third preset condition corresponding to the third to-be-processed data may be that the accelerator pedal opening change rate is greater than a preset third threshold;

specifically, a plurality of threshold values may be set to determine the output power of the range extender corresponding to the vehicle accelerator pedal opening change rate according to the vehicle accelerator pedal opening change rate;

for example, a threshold value of 1 may be set, where the output power of the range extender corresponding to the threshold value of 1 is P₁Taking the threshold value 1 as a preset third threshold value, and when the accelerator pedal opening change rate is greater than the preset third threshold value, the output power of the corresponding range extender is P₁；

For another example, a threshold 2 may also be set, where the threshold 2 is greater than the threshold 1, and the output power of the range extender corresponding to the threshold 2 is P₂Taking the threshold 2 as a preset third threshold, and when the accelerator pedal opening degree change rate is greater than the preset third threshold, the output power of the corresponding range extender is P₂。

Specifically, when the accelerator pedal opening degree change rate is greater than the threshold value 1, and the output power of the corresponding range extender is P₁And when the accelerator pedal opening degree change rate is smaller than the threshold value 2.

S105, when the matching result of at least two pieces of data to be processed exists in the plurality of pieces of data to be processed, the matching result is successful, according to the corresponding relation between the preset conditions and the control strategies, the control strategies corresponding to the preset conditions matched with the successfully matched data to be processed are obtained, and the obtained control strategies are used as pre-selection control strategies;

in the embodiments of the present specification, the preset conditions correspond to the control strategies one to one; for example, the first preset condition corresponds to a first control strategy;

and when at least two of the first matching result, the second matching result and the third matching result which are successfully matched exist, acquiring a control strategy corresponding to a preset condition matched with each successfully matched data to be processed, and taking each acquired control strategy as a preselected control strategy.

For example, when the first matching result and the second matching result exist, a first control strategy corresponding to a first preset condition and a second control strategy corresponding to a second preset condition are obtained; the first control strategy and the second control strategy are taken as preselected control strategies.

For another example, when the first matching result, the second matching result, and the third matching result exist at the same time, a first control strategy corresponding to the first preset condition, a second control strategy corresponding to the second preset condition, and a third control strategy corresponding to the third preset condition are obtained; and taking the first control strategy, the second control strategy and the third preset condition as the preselected control strategy.

S107, calculating the output power of the range extender under each preselected control strategy to obtain a data set containing a plurality of output powers;

in the embodiment of the present specification, when a first matching result, a second matching result, and a third matching result exist at the same time, the output power of the range extender under three control strategies is obtained; a data set comprising three output powers is obtained.

In the embodiment of the present specification, when a difference between a current discharge power of the battery and an average required power of the vehicle is taken as first data to be processed; when the first control strategy can be used to control the range extender to start:

as shown in fig. 2, in the embodiment of the present disclosure, a flowchart of a method for obtaining an output power of a range extender under a first control strategy provided in the embodiment of the present disclosure is shown; the concrete steps are as follows:

after determining that the difference between the current discharge power of the battery and the average required power of the vehicle is smaller than a preset first threshold, the method further comprises the following steps:

s201, acquiring a first control strategy corresponding to a first preset condition;

s203, acquiring a first preset power of the range extender in the first control strategy and a preset output power threshold of the battery;

in the embodiment of the present specification, the first preset power may be an upper limit power of an economic zone of the range extender;

the preset output power threshold of the battery can be set according to the discharging capacity of the current electric quantity of the battery and the difference between the maximum required power of the whole vehicle and the upper limit power of the range extender economic area.

S205, judging whether the average required power of the vehicle is larger than the first preset power or not and whether the current remaining capacity of the battery is larger than a preset second threshold or not;

and S207, if yes, determining the output power of the range extender according to the average required power of the vehicle and the preset output power threshold of the battery.

In the embodiment of the present specification, when the current remaining capacity of the battery is taken as the second data to be processed; when the range extender start-up can be controlled using the second control strategy:

as shown in fig. 3, in the embodiment of the present disclosure, a flowchart of a method for obtaining an output power of a range extender under a second control strategy provided in the embodiment of the present disclosure is shown; the concrete steps are as follows:

after determining that the current remaining capacity of the battery is within a preset remaining capacity interval, the method further includes:

s301, acquiring a second control strategy matched with a second preset condition;

s303, acquiring the oil consumption data of the engine and the working efficiency of a vehicle system under the second control strategy;

in the embodiment of the present specification, the vehicle engine may be a special engine for an extended range electric vehicle, which is an engine with small displacement, small volume, direct pressurized injection, low speed in a high efficiency region, and high thermal efficiency; high thermal efficiency is reflected in technical applications such as high compression ratio, miller cycle, external exhaust gas recirculation, i.e. external EGR and heating management.

S305, determining a high-efficiency working area of the engine according to the oil consumption data of the engine and the working efficiency of the vehicle system;

in the embodiment of the specification, the power of the starting section of the range extender can be set according to the oil consumption data of the engine and the working efficiency of a vehicle system, so that the range extender operates in a low-speed section high-efficiency area.

S307, acquiring the efficiency of the range extender, the charging and discharging efficiency of a battery and the charging energy proportion of the range extender;

and S309, determining the output power of the range extender according to the efficiency of the range extender, the charging and discharging efficiency of the battery and the charging energy proportion of the range extender based on the efficient working area of the engine.

In the embodiment of the specification, in the high-efficiency region working area of the engine, the range extender efficiency, the battery charge-discharge efficiency and the range extender charge energy ratio are integrated to select the optimal range extender output power point, wherein the optimal range extender output power point is not necessarily the highest thermal efficiency point of the engine.

In the embodiment of the present specification, when the accelerator pedal opening change rate of the vehicle in the preset time period is taken as the third data to be processed; when the range extender start-up can be controlled using the third control strategy:

and directly acquiring the output power of the range extender corresponding to the third threshold value after the accelerator pedal opening degree change rate is judged to be larger than the preset third threshold value.

S109, determining target output power from the data set;

in the present specification embodiment, the target output power may be the maximum output power of the three output powers.

S111, taking a preselected control strategy corresponding to the target output power as a target control strategy;

in the embodiment of the present specification, a preselected control strategy corresponding to the maximum output power is used as a target control strategy, that is, a control strategy for controlling the start of the range extender.

And S113, controlling the range extender to start based on the target control strategy.

In an embodiment of the present description, the requested power for the range extender to start may be a target output power corresponding to a target control strategy.

In another embodiment of the present specification, when only one of the first matching result, the second matching result, and the third matching result is satisfied separately, the range extender is controlled to start by the control strategy corresponding to the matching result that exists separately; the range extender is controlled to start by the first control strategy, the second control strategy or the third control strategy;

acquiring target output power corresponding to a target control strategy for controlling the range extender to start;

and taking the target output power as the requested power for starting the range extender.

In the embodiment of the present specification, when the range extender is controlled to start by the first control strategy alone, as shown in fig. 4, a flowchart of a method for controlling the range extender of the vehicle by the first control strategy provided in the embodiment of the present specification is shown; the concrete steps are as follows:

s401, acquiring the current actual required power of the vehicle, the current residual capacity of the battery and the current battery core temperature;

s403, acquiring a first preset power of the range extender in operation and a preset output power threshold of the battery;

in the embodiment of the present specification, the first preset power may be an upper limit power of an economic zone of the range extender;

the preset output power threshold of the battery can be set according to the discharging capacity of the current electric quantity of the battery and the difference between the maximum required power of the whole vehicle and the upper limit power of the range extender economic area.

S405, obtaining the current target discharge power of the battery according to the current residual capacity of the battery and the current battery core temperature;

in this specification embodiment, the current target discharge power of the battery may be a current maximum allowable discharge power of the battery.

S407, obtaining the average required power of the vehicle according to the actual required power and a preset step length;

in the embodiment of the present specification, in the embodiment of the specification of the vehicle in the present preset time period, the preset step length may be a fixed step length; for example, the average power is obtained by taking a fixed step length of every 4s, namely t1-t4 as a step length, and an average power P is obtained according to the power P1-P4 at each time in the time period of t1-t 4; t2-t5 is also a step size, and thus an average power is obtained.

S409, judging whether the difference between the current discharging power of the battery and the average required power of the vehicle is smaller than a preset first threshold value or not;

in the embodiment of the present specification, the difference between the current discharge power of the battery and the average required power of the vehicle may be a difference value of the current discharge power of the battery minus the average required power of the vehicle;

specifically, the preset first threshold is set to prevent the battery from discharging at the maximum power, so as to protect the battery from delaying the service life.

In the embodiment of the specification, when the difference between the current discharging power of the battery and the average required power of the vehicle is smaller than a preset first threshold, the condition that the range extender can be controlled to start is met;

s411, if yes, judging whether the average required power of the vehicle is larger than the first preset power or not and whether the current remaining capacity of the battery is larger than a preset second threshold or not;

in the embodiment of the present specification, the preset second threshold may be a lowest allowable value of the remaining amount of the battery.

And S413, if so, controlling the range extender to start, and determining the output power of the range extender according to the average required power of the vehicle and the preset output power threshold of the battery.

In this embodiment, when the average required power of the vehicle is greater than the first preset power and the current remaining capacity of the battery is greater than a preset second threshold, the output power of the range extender may be obtained by subtracting the preset output power threshold of the battery from the average required power of the vehicle; at the moment, the power of the vehicle is output by the range divider and the power battery.

In another embodiment of the present disclosure, if not, the output power of the range extender is the average required power of the vehicle.

In the embodiment of the present specification, when the range extender is controlled to start by the second control strategy alone, as shown in fig. 5, it is a flowchart illustrating a method for controlling the range extender of the vehicle by the second control strategy provided in the embodiment of the present specification; the concrete steps are as follows:

s501, acquiring the current residual capacity of the battery;

s503, obtaining oil consumption data of the engine and the working efficiency of a vehicle system;

s505, acquiring the efficiency of the range extender, the charging and discharging efficiency of a battery and the charging energy proportion of the range extender;

s507, judging whether the current residual capacity of the battery is within a preset residual capacity interval or not;

in the embodiment of the present specification, the preset remaining power interval may be set in a hysteresis setting manner according to an electrical property of the battery, for example, the current remaining power of the battery may be divided into sections [ a-b ], [ c-d ], [ e-f ], and the like, where each section is correspondingly provided with a constant output power of the range extender; for example, the output power corresponding to the sections [ a-b ] is Psoc1, the output power corresponding to the sections [ c-d ] is Psoc2, the output power corresponding to the sections [ e-f ] is Psoc3, and the values are increased in sequence from a-f, so that the problem that the output power of the range extender is frequently switched when the residual capacity of the battery is close to the threshold value is solved.

In another embodiment of the present specification, a current remaining capacity (SOC) of a battery is used as a determination parameter for description; when the SOC is gradually decreased: if the SOC is larger than b, the range extender is closed, the SOC is larger than d and smaller than b, the range extender is opened, and the output power is Psoc 1. If the SOC is continuously reduced, the output power is Psoc 2; if the SOC starts to run upwards: if d is more than SOC and less than a, the range extender is started, and the output power is Psoc 1; SOC is more than a, and the range extender is closed.

S509, if yes, controlling the range extender to start, and determining an efficient working area of the engine according to the oil consumption data of the engine and the working efficiency of the vehicle system;

and S511, in the high-efficiency working area of the engine, determining the output power of the range extender according to the efficiency of the range extender, the charging and discharging efficiency of the battery and the charging energy proportion of the range extender.

In the embodiment of the present specification, when the range extender is controlled to start by the third control strategy alone, the control method is as follows:

acquiring the accelerator pedal opening degree change rate of the vehicle within a preset time period;

judging whether the accelerator pedal opening change rate is larger than a preset third threshold value or not;

and if so, controlling the range extender to start, and acquiring the output power of the range extender corresponding to the preset third threshold value.

As can be seen from the embodiments of the method, the device, the terminal and the storage medium for controlling the range extender of the vehicle provided by the invention, the embodiment of the invention acquires a plurality of pieces of data to be processed of the vehicle; matching each data to be processed with corresponding preset conditions to obtain a matching result; when the matching result of at least two pieces of data to be processed in the plurality of pieces of data to be processed is successful, acquiring a control strategy corresponding to the preset condition matched with each piece of successfully matched data to be processed according to the corresponding relation between the preset condition and the control strategy, and taking each acquired control strategy as a preselected control strategy; calculating the output power of the range extender under each preselected control strategy to obtain a data set containing a plurality of output powers; determining a target output power from the data set; taking a preselected control strategy corresponding to the target output power as a target control strategy; controlling the range extender to start based on the target control strategy; by utilizing the technical scheme provided by the embodiment of the specification, a plurality of data to be processed of the vehicle are obtained; matching the data to be processed with corresponding preset conditions to obtain matching results and the corresponding relation between the preset conditions and the control strategies, and acquiring preselected control strategies; and selecting the target output power and the target control strategy corresponding to the target output power from the output powers of the range extender under the multiple preselected control strategies, and controlling the range extender to start according to the target control strategy, so that the range extender operates in a high-efficiency area, the oil consumption is reduced, and the NVH performance improvement, the power responsiveness and the economy are facilitated.

The embodiment of the invention also provides a range extender control device for a vehicle, as shown in fig. 6, which is a schematic structural diagram of the range extender control device for a vehicle provided by the embodiment of the invention; specifically, the device comprises:

a to-be-processed data acquisition module 610, configured to acquire a plurality of to-be-processed data of a vehicle;

the matching module 620 is configured to match each piece of data to be processed with a corresponding preset condition to obtain a matching result;

a control policy obtaining module 630, configured to, when a matching result of at least two pieces of to-be-processed data in the plurality of pieces of to-be-processed data is a successful matching, obtain, according to a corresponding relationship between a preset condition and a control policy, a control policy corresponding to the preset condition matched with each piece of successfully-matched to-be-processed data, and use each obtained control policy as a preselected control policy;

the data set acquisition module 640 is configured to calculate output power of the range extender under each preselected control strategy to obtain a data set including multiple output powers;

a target output power determination module 650 for determining a target output power from the data set;

a target control strategy determining module 660, configured to use a preselected control strategy corresponding to the target output power as a target control strategy;

a range extender start control module 670 to control the range extender start based on the target control strategy.

In this embodiment, the to-be-processed data obtaining module 610 includes:

the first acquisition unit is used for acquiring the current actual required power of the vehicle, the current residual capacity of the battery, the current battery core temperature and the accelerator pedal opening change rate of the vehicle in a preset time period;

the target discharge power acquisition unit is used for acquiring the current target discharge power of the battery according to the current residual capacity of the battery and the current battery core temperature;

the average required power obtaining unit is used for obtaining the average required power of the vehicle according to the actual required power and a preset step length;

a first processing unit configured to take a difference between a current discharge power of the battery and an average required power of the vehicle as first data to be processed;

the second processing unit is used for taking the current residual capacity of the battery as second data to be processed;

and the third processing unit is used for taking the accelerator pedal opening change rate of the vehicle in the preset time period as third data to be processed.

In the embodiment of the present specification, when the difference between the current discharge power of the battery and the average required power of the vehicle is taken as the first data to be processed, the matching module 620 includes:

the first judging unit is used for judging whether the difference between the current discharging power of the battery and the average required power of the vehicle is smaller than a preset first threshold value or not;

and the first judging unit is used for judging that the first to-be-processed data is successfully matched with a first preset condition, and taking the difference between the current discharging power of the battery and the average required power of the vehicle as a first matching result of successful matching, wherein the difference is smaller than a preset first threshold value.

In an embodiment of the present specification, the first determination unit is followed by:

the second acquisition unit is used for acquiring a first control strategy corresponding to the first preset condition;

the third acquisition unit is used for acquiring a first preset power of the range extender in operation under the first control strategy and a preset output power threshold of the battery;

the second judging unit is used for judging whether the average required power of the vehicle is larger than the first preset power or not and whether the current residual capacity of the battery is larger than a preset second threshold or not;

the first determining unit is used for determining the output power of the range extender according to the average required power of the vehicle and a preset output power threshold value of the battery.

In this embodiment of the present specification, when the current remaining capacity of the battery is taken as the second to-be-processed data, the matching module 620 includes:

the third judging unit is used for judging whether the current residual capacity of the battery is within a preset residual capacity interval or not;

and the second judging unit is used for judging that the second to-be-processed data is successfully matched with a second preset condition, and taking the current residual capacity of the battery in a preset residual capacity interval as a second matching result of successful matching.

In an embodiment of the present specification, the second determining unit is followed by:

the fourth acquisition unit is used for acquiring a second control strategy matched with a second preset condition;

the fifth acquisition unit is used for acquiring the oil consumption data of the engine under the second control strategy and the working efficiency of a vehicle system;

the second determining unit is used for determining an efficient working area of the engine according to the oil consumption data of the engine and the working efficiency of the vehicle system;

the sixth acquisition unit is used for acquiring the efficiency of the range extender, the charging and discharging efficiency of the battery and the charging energy proportion of the range extender;

and the third determining unit is used for determining the output power of the range extender according to the efficiency of the range extender, the charging and discharging efficiency of the battery and the charging energy proportion of the range extender based on the efficient working area of the engine.

In this specification embodiment, when the rate of change of the accelerator pedal opening of the vehicle in the preset time period is taken as the third data to be processed, the matching module 620 includes:

the fourth judging unit is used for judging whether the accelerator pedal opening change rate is larger than a preset third threshold value or not;

and the third judging unit is used for judging that the third to-be-processed data is successfully matched with a third preset condition, and taking the accelerator pedal opening change rate larger than a preset third threshold value as a third matching result of successful matching.

The embodiment of the invention provides a range extender control terminal of a vehicle, which comprises a processor and a memory;

the memory stores one or more instructions suitable for being loaded and executed by the processor to realize the range extender control method of the vehicle according to the method embodiment.

The memory may be used to store software programs and modules, and the processor may execute various functional applications and data processing by operating the software programs and modules stored in the memory. The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs needed by functions and the like; the storage data area may store data created according to use of the apparatus, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory may also include a memory controller to provide the processor access to the memory.

Fig. 7 is a schematic structural diagram of a range extender control terminal of a vehicle according to an embodiment of the present invention, where the internal configuration of the range extender control terminal of the vehicle may include, but is not limited to: the processor, the network interface and the memory in the range extender control terminal of the vehicle may be connected by a bus or in other manners, and the bus connection is taken as an example in fig. 7 shown in the embodiment of the present specification.

The processor (or CPU) is a computing core and a control core of the range extender control terminal of the vehicle. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI, mobile communication interface, etc.). The Memory (Memory) is a Memory device in a range extender control terminal of a vehicle, and is used for storing programs and data. It is understood that the memory herein may be a high-speed RAM storage device, or may be a non-volatile storage device (non-volatile memory), such as at least one magnetic disk storage device; optionally, at least one memory device located remotely from the processor. The memory provides a storage space that stores an operating system of a range extender control terminal of the vehicle, which may include, but is not limited to: windows system (an operating system), Linux (an operating system), etc., which are not limited thereto; also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor. In this embodiment, the processor loads and executes one or more instructions stored in the memory to implement the range extender control method for a vehicle provided in the above method embodiment.

Embodiments of the present invention also provide a computer-readable storage medium, which may be disposed in a range extender control terminal of a vehicle to store at least one instruction, at least one program, a code set, or an instruction set related to implementing a range extender control method of the vehicle in the method embodiments, where the at least one instruction, the at least one program, the code set, or the instruction set may be loaded and executed by a processor of an electronic device to implement the range extender control method of the vehicle provided in the method embodiments.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

It should be noted that: the precedence order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the device and server embodiments, since they are substantially similar to the method embodiments, the description is simple, and the relevant points can be referred to the partial description of the method embodiments.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.