阅读说明：本技术 发电控制方法、装置、整车控制器及存储介质 (Power generation control method and device, vehicle control unit and storage medium ) 是由 宗伟 李丕茂 刘强 曹永� 郭太民 李志宗 王圣涛 韩富强 于 2021-08-24 设计创作，主要内容包括：本公开涉及一种发电控制方法、装置、整车控制器及存储介质。该方法包括：在当前动力电池的电量小于或等于目标电量等级时,确定发动机处于目标燃油经济区间内的发动机目标扭矩,其中,目标电量等级为启动发动机发电的最大电量等级,根据当前驾驶参数,计算驾驶员需求扭矩,根据驾驶员需求扭矩和发动机目标扭矩,计算发电机发电扭矩和发动机发电扭矩,基于发电机发电扭矩和发动机发电扭矩,控制发动机带动发电机发电。根据本公开实施例,可以控制在目标燃油经济区内工作的发动机带动发电机发电,使得发动机在消耗较少的燃油的同时为当前动力电池充电,降低了混合动力汽车的整体油耗。(The disclosure relates to a power generation control method and device, a vehicle control unit and a storage medium. The method comprises the following steps: when the electric quantity of the current power battery is smaller than or equal to a target electric quantity grade, determining an engine target torque of the engine within a target fuel economy interval, wherein the target electric quantity grade is the maximum electric quantity grade for starting the power generation of the engine, calculating a driver required torque according to current driving parameters, calculating a generator power generation torque and an engine power generation torque according to the driver required torque and the engine target torque, and controlling the engine to drive the generator to generate power based on the generator power generation torque and the engine power generation torque. According to the embodiment of the disclosure, the engine working in the target fuel economy area can be controlled to drive the generator to generate power, so that the engine can charge the current power battery while consuming less fuel, and the overall fuel consumption of the hybrid electric vehicle is reduced.)

1. A power generation control method characterized by comprising:

when the electric quantity of the current power battery is smaller than or equal to a target electric quantity grade, determining the target torque of the engine within a target fuel economy interval, wherein the target electric quantity grade is the maximum electric quantity grade for starting the power generation of the engine;

calculating the torque required by the driver according to the current driving parameters;

calculating a generator generating torque and an engine generating torque according to the driver required torque and the engine target torque;

and controlling the engine to drive the generator to generate power based on the generator generating torque and the engine generating torque.

2. The method of claim 1, wherein said determining that the engine is at the engine target torque within the target fuel economy zone comprises:

controlling a transmission to adjust a current gear to a target gear;

determining a target rotating speed of the engine in a target fuel economy range according to the target gear and the current vehicle speed;

and determining the target torque of the engine according to the corresponding relation between the rotating speed and the torque in the target fuel economy interval and the target rotating speed.

3. The method of claim 1, wherein the current driving parameters comprise: accelerator opening, current vehicle speed and transmission gear;

wherein said calculating a driver demand torque based on current driving parameters comprises:

determining pedal torque according to the accelerator opening, the current vehicle speed and a pedal map acquired in advance;

comparing the pedal torque with a transmission gear transmission ratio corresponding to a transmission gear to obtain transmission input shaft torque;

taking the transmission input shaft torque as the driver demand torque.

4. The method of claim 3, wherein said using said transmission input shaft torque as said driver demanded torque comprises:

and taking the transmission input shaft torque as the driver required torque when the transmission input shaft torque is less than or equal to the sum of the engine maximum torque and the motor maximum torque and the transmission input shaft torque is less than or equal to a transmission maximum torque limit value.

5. The method of claim 3, wherein after said comparing said pedal torque to a transmission gear ratio corresponding to a transmission gear to obtain a transmission input shaft torque, said method further comprises:

comparing the sum of engine torque capacity and electric machine torque capacity to a transmission torque capacity limit if the transmission input shaft torque is greater than the sum of engine torque capacity and electric machine torque capacity;

taking a sum of the engine maximum torque and the motor maximum torque as the driver required torque in a case where the sum of the engine maximum torque and the motor maximum torque is less than or equal to the transmission maximum torque limit value;

in a case where the sum of the engine maximum torque and the motor maximum torque is larger than the transmission maximum torque limit value, the transmission maximum torque limit value is taken as the driver required torque.

6. The method according to claim 1, wherein the calculating a generator generating torque and an engine generating torque based on the driver demand torque and the engine target torque comprises:

subtracting the engine target torque from the driver demand torque to obtain a torque difference between the driver demand torque and the engine target torque;

calculating the generator generating torque according to a torque difference between the driver required torque and the engine target torque and a generator limit condition;

the engine electric power generation torque is calculated based on the engine limit condition and a torque difference between the driver required torque and the generator electric power generation torque.

7. The method of claim 6, wherein the generator limit conditions include a generator torque maximum and a generator maximum charging power;

wherein the calculating of the generator generation torque based on the torque difference between the driver demand torque and the engine target torque and a generator limit condition includes:

and taking the difference between the driver required torque and the engine target torque as the generator torque when the difference between the driver required torque and the engine target torque is less than or equal to a generator torque maximum value and the current charging power of a generator is less than or equal to the maximum charging power of the generator.

8. The method of claim 6, wherein the engine limiting condition comprises an engine generated torque maximum;

wherein the calculating the engine generation torque based on the difference in torque between the driver demand torque and the generator generation torque and the engine limit condition includes:

in a case where a torque difference between the driver required torque and the generator torque is less than or equal to an engine power generation torque maximum value, the torque difference between the driver required torque and the generator torque is taken as the engine power generation torque.

9. The method according to claim 1, wherein the driver demand torque is equal to a sum of the engine target torque and the generator generating torque when a charge of a current power battery is greater than a target charge level.

10. An electricity generation control device characterized by comprising:

the engine target torque determining module is used for determining the engine target torque of the engine in a target fuel economy interval when the electric quantity of the current power battery is smaller than or equal to a target electric quantity grade, wherein the target electric quantity grade is the maximum electric quantity grade for starting the engine to generate electricity;

the first torque calculation module is used for calculating the torque required by the driver according to the current driving parameters;

the second torque calculation module is used for calculating generator generating torque and engine generating torque according to the driver required torque and the engine target torque;

and the power generation control module is used for controlling the engine to drive the generator to generate power based on the power generation torque of the generator and the power generation torque of the engine.

11. A vehicle control unit, comprising:

one or more processors;

a storage device for storing one or more programs,

when executed by the one or more processors, cause the one or more processors to implement the power generation control method of any one of claims 1-9.

12. A computer-readable storage medium on which a computer program is stored, the computer program, when being executed by a processor, implementing the power generation control method according to any one of claims 1 to 9.

Technical Field

The disclosure relates to the technical field of vehicle control, and in particular to a power generation control method and device, a vehicle control unit and a storage medium.

Background

A hybrid vehicle refers to a vehicle having at least two power sources, one or more of which may be used to provide some or all of its power.

At present, when the battery electric quantity of the hybrid electric vehicle is low, an engine needs to be started to provide power for the hybrid electric vehicle and charge the battery. However, during the process of charging the battery, the oil consumption of the engine is high, and the overall oil consumption of the hybrid electric vehicle is improved.

Disclosure of Invention

In order to solve the technical problems or at least partially solve the technical problems, the present disclosure provides a power generation control method, device, vehicle control unit and storage medium.

In a first aspect, the present disclosure provides a power generation control method, including:

when the electric quantity of the current power battery is smaller than or equal to a target electric quantity grade, determining the target torque of the engine within a target fuel economy interval, wherein the target electric quantity grade is the maximum electric quantity grade for starting the power generation of the engine;

calculating the torque required by the driver according to the current driving parameters;

calculating a generator generating torque and an engine generating torque according to the driver required torque and the engine target torque;

and controlling the engine to drive the generator to generate power based on the generator generating torque and the engine generating torque.

In a second aspect, the present disclosure provides a power generation control device, the device including:

the engine target torque determining module is used for determining the engine target torque of the engine in a target fuel economy interval when the electric quantity of the current power battery is smaller than or equal to a target electric quantity grade, wherein the target electric quantity grade is the maximum electric quantity grade for starting the engine to generate electricity;

the first torque calculation module is used for calculating the torque required by the driver according to the current driving parameters;

the second torque calculation module is used for calculating generator generating torque and engine generating torque according to the driver required torque and the engine target torque;

and the power generation control module is used for controlling the engine to drive the generator to generate power based on the power generation torque of the generator and the power generation torque of the engine.

In a third aspect, an embodiment of the present disclosure further provides a vehicle control unit, where the vehicle control unit includes:

one or more processors;

a storage device for storing one or more programs,

when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the power generation control method provided by the first aspect.

In a fourth aspect, the disclosed embodiments also provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the power generation control method provided in the first aspect.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the power generation control method, the power generation control device, the vehicle control unit and the storage medium, when the electric quantity of the current power battery is smaller than or equal to the target electric quantity grade, the target torque of the engine in the target fuel economy region can be determined, the engine can work in the target fuel economy region, the torque required by a driver is calculated according to the current driving parameters, the power generation torque of the generator and the power generation torque of the engine are further calculated according to the torque required by the driver and the target torque of the engine, the engine working in the target fuel economy region is controlled to drive the generator to generate power based on the power generation torque of the generator and the power generation torque of the engine, the current power battery is charged by the engine while less fuel is consumed, and the overall fuel consumption of the hybrid electric vehicle is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is an architecture diagram of a power generation control system according to an embodiment of the present disclosure;

fig. 2 is a schematic flow chart of a power generation control method according to an embodiment of the present disclosure;

FIG. 3 is a schematic illustration of a fuel economy zone provided by an embodiment of the present disclosure;

FIG. 4 is a schematic illustration of a torque distribution provided by an embodiment of the present disclosure;

FIG. 5 is a schematic flow chart diagram illustrating another power generation control method provided by the embodiments of the present disclosure;

fig. 6 is a schematic structural diagram of a power generation control device according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a vehicle control unit according to an embodiment of the present disclosure.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

At present, when the battery electric quantity of the hybrid electric vehicle is low, an engine needs to be started to provide power for the hybrid electric vehicle and charge the battery. In the related art, when the battery charge is low, the hybrid vehicle controls only the start timing of the engine, for example, the number of times of starting the engine or the operating time of the engine is increased. The hybrid electric vehicle may be a parallel hybrid electric vehicle with two clutches, or may be another type of hybrid electric vehicle, which is not limited herein.

However, although the control mode can achieve the purpose of charge control, the operation condition of the engine is not finely controlled, so that the engine operates in a poor fuel economy interval, the fuel consumption of the engine is improved, and the overall fuel consumption of the hybrid electric vehicle is further improved.

In order to solve the above problem, embodiments of the present disclosure provide a power generation control method and apparatus, a vehicle control unit, and a storage medium.

Fig. 1 shows an architecture diagram of a power generation control system provided by an embodiment of the present disclosure.

As shown in fig. 1, the architecture diagram may include a vehicle control unit 10, an engine 20, a generator 30, and a current power battery 40.

Based on the above-described architecture, the vehicle control unit 10 may determine whether the current power of the power battery 40 is less than or equal to the target power level, determining an engine target torque at which the engine is within a target fuel economy interval when it is determined that the current power battery charge is less than or equal to the target charge level, the engine 20 is operated in the target fuel economy zone, and based on the current driving parameters, the driver required torque is calculated, to further calculate a generator generating torque and an engine generating torque based on the driver required torque and the engine target torque, and then controls the engine 20 operating in the target fuel economy region to drive the generator 30 to generate electricity based on the generator generating torque and the engine generating torque, the engine 20 can charge the current power battery 40 while consuming less fuel, and the overall fuel consumption of the hybrid electric vehicle is reduced.

Therefore, based on the framework, the engine is controlled to charge the current power battery while consuming less fuel, and the overall fuel consumption of the hybrid electric vehicle is reduced.

Fig. 2 shows a flow chart of a power generation control method provided by the embodiment of the disclosure.

As shown in fig. 2, the power generation control method may include the following steps.

And S210, when the electric quantity of the current power battery is smaller than or equal to the target electric quantity grade, determining the target torque of the engine within the target fuel economy interval.

In the disclosed embodiment, the current power battery may be a battery that needs to be charged with a generator.

Specifically, the vehicle control unit may monitor the current electric quantity of the power battery in real time, determine whether the current electric quantity of the power battery is less than or equal to a target electric quantity level, and determine that the engine needs to be started to drive the generator to generate power to charge the current electric quantity battery and determine that the engine is in a target engine torque within a target fuel economy interval if the current electric quantity of the power battery is less than or equal to the target electric quantity level.

In the disclosed embodiment, the target power level is the maximum power level at which the engine is started to generate power.

In the disclosed embodiment, the vehicle control unit may predetermine power levels, each of which may be used to characterize a degree of starting of the engine. Alternatively, the charge level may include three levels L1, L2, and L3, each level indicating a decrease in the degree of engine cranking. Where L2 may be a target charge level.

In one example, when the current power battery has a capacity greater than L1 and less than or equal to L2 level, indicating that the current power battery has insufficient capacity, the engine needs to be frequently started to drive the generator to generate power to charge the current power battery.

In another example, when the current power battery is less than or equal to the L1 level, indicating that the current power battery is severely out of power, the engine needs to be started all the time to drive the generator to generate power to charge the current power battery.

In the disclosed embodiment, the target fuel economy interval may be an optimal fuel interval.

FIG. 3 illustrates a schematic diagram of a fuel economy zone provided by an embodiment of the present disclosure.

As shown in fig. 3, the fuel economy zone may include a target fuel economy zone, an intermediate fuel economy zone, and a worst fuel economy zone.

Wherein the rotational speed in each of the fuel economy zones corresponds to the torque. The target fuel economy zone may be an optimal fuel economy zone. When the rotating speed of the engine is the same, if the torque corresponding to the rotating speed is in the target fuel economy interval, the oil consumption of the engine is the lowest; if the torque corresponding to the rotating speed is in the middle fuel economy interval, the oil consumption of the engine is lower; and if the torque corresponding to the rotating speed is in the worst fuel economy interval, the fuel consumption of the engine is the highest. Therefore, when the engine is in the target fuel economy interval, the fuel consumption of the engine can be minimized.

In the disclosed embodiment, the engine target torque may be a torque corresponding to a target rotation speed of the engine within a target fuel economy zone.

In some embodiments of the present disclosure, determining an engine target torque for which the engine is within a target fuel economy zone may include:

controlling a transmission to adjust a current gear to a target gear;

determining a target rotating speed of the engine in a target fuel economy range according to the target gear and the current vehicle speed;

and determining the target torque of the engine according to the corresponding relation between the rotating speed and the torque in the target fuel economy interval and the target rotating speed.

In the disclosed embodiment, the transmission may be a transmission for controlling gears.

Specifically, when the vehicle control unit determines that the electric quantity of the current power battery is smaller than or equal to the target electric quantity grade, a gear shifting instruction can be generated and sent to the transmission, so that the transmission is adjusted from the current gear to the target gear, the target rotating speed of the engine in the target fuel economy range is determined according to the target gear and the current vehicle speed, and the target torque of the engine is further determined according to the corresponding relation between the rotating speed and the torque in the target fuel economy range and the target rotating speed.

In the disclosed embodiment, the current gear may be a transmission gear at a time when the current power battery charge is determined to be less than or equal to the target charge level.

In the disclosed embodiment, the target gear may be separated from the current gear by one gear, two gears, or three gears, or the target gear may be the highest gear.

In the embodiment of the disclosure, the vehicle control unit may determine a transmission gear transmission ratio corresponding to a target gear, determine a target rotation speed according to the transmission gear transmission ratio and a current vehicle speed, and further determine a torque corresponding to the target rotation speed of the engine in a target fuel economy zone as the target torque.

In the embodiment of the disclosure, the vehicle control unit may determine a correspondence relationship between the rotation speed and the torque in the target fuel economy zone in advance, and determine the target torque of the engine according to the correspondence relationship between the rotation speed and the torque in the target fuel economy zone and the target rotation speed, so that the target torque of the engine may include at least one torque.

Tables 1-2 show a table of engine speed versus engine generated torque for the target fuel economy interval.

Table 1: relation table of engine speed and engine power generation torque in target fuel economy interval

Table 2: relation table of engine speed and engine power generation torque in target fuel economy interval

For example, after the vehicle control unit determines the target gear and the current vehicle speed, the target rotation speed of the engine in the target fuel economy zone is determined to be 4200r/min according to the transmission gear transmission ratio corresponding to the target gear, the transmission gear transmission ratio and the current vehicle speed, and the target torque of the engine is determined according to the corresponding relation between the rotation speed and the torque in the target fuel economy zone and the target rotation speed, so that the target torque of the engine can be 100 Nm.

Therefore, in the embodiment of the disclosure, the current gear can be adjusted to the target gear, so that the engine is in the target fuel economy zone, the oil consumption of the engine is the lowest, and the target torque of the engine in the target fuel economy zone is determined, so as to further generate power according to the target torque of the engine, and improve the charging speed of the current power battery.

And S220, calculating the torque required by the driver according to the current driving parameters.

In the disclosed embodiment, the current driving parameter may be a driving-related parameter of the hybrid vehicle.

In some embodiments, the current driving parameters may include: accelerator opening and vehicle speed.

In other embodiments, the current driving parameters may include: accelerator opening, vehicle speed and transmission gear.

In the embodiment of the present disclosure, the driver required torque may be a torque that can fulfill the driving demand of the driver for the steady vehicle speed running, the passing running, and the like.

Specifically, after the vehicle control unit determines that the engine target torque of the engine is within the target fuel economy zone, the vehicle control unit may calculate the driver required torque according to the accelerator opening, the vehicle speed and the transmission gear, so as to further generate power according to the driver required torque and the engine target torque of the engine within the target fuel economy zone.

And S230, calculating generator generating torque and engine generating torque according to the driver required torque and the engine target torque.

Specifically, after the vehicle control unit determines the driver required torque and the engine target torque of the engine within the target fuel economy zone, the vehicle control unit may perform torque distribution on the engine and the motor according to the driver required torque and the engine target torque of the engine within the target fuel economy zone to calculate the generator generating torque and the engine generating torque.

In the embodiment of the disclosure, when power generation is required for the current power battery, the target engine torque may be greater than the driver required torque, a torque difference between the target engine torque and the driver required torque may be used as a generator power generation torque, and a torque difference between the driver required torque and the generator torque may be used as an engine power generation torque, so that the engine drives the generator to generate power based on the generator torque according to the engine power generation torque to charge the current power battery.

And S240, controlling the engine to drive the generator to generate power based on the generator generating torque and the engine generating torque.

Specifically, after the vehicle control unit determines the generator generating torque and the engine generating torque, the vehicle control unit may send a request corresponding to the generator generating torque to the generator control module, and send a request corresponding to the engine generating torque to the engine control module, so that the generator control module drives the engine control module to generate power based on the engine generating torque according to the generator generating torque, thereby achieving the purpose of charging the current power battery.

In the embodiment of the disclosure, when the electric quantity of the current power battery is less than or equal to the target electric quantity grade, the target torque of the engine in the target fuel economy zone of the engine can be determined, so that the engine works in the target fuel economy zone, the torque required by the driver is calculated according to the current driving parameters, the power generation torque of the generator and the power generation torque of the engine are further calculated according to the torque required by the driver and the target torque of the engine, and then the engine working in the target fuel economy zone is controlled to drive the generator to generate power based on the power generation torque of the generator and the power generation torque of the engine, so that the engine charges the current power battery while consuming less fuel, and the overall fuel consumption of the hybrid electric vehicle is reduced.

In another embodiment of the present disclosure, the current driving parameters may include: the accelerator opening, the current vehicle speed and the transmission gear are used for further calculating the required torque of the driver based on the accelerator opening, the current vehicle speed and the transmission gear.

In the disclosed embodiment, the accelerator opening may be an opening of an accelerator pedal on a hybrid vehicle.

In the disclosed embodiment, the current vehicle speed may be the vehicle speed at which it is determined that the current power battery charge is less than or equal to the target charge level.

In the disclosed embodiment, the transmission gear may be a transmission gear of a hybrid vehicle. Optionally, the transmission gears may include: parking (P), neutral (N), forward (D), reverse (R), and low (L) gear.

In the disclosed embodiment, the current driving parameters include: in the case of the accelerator opening, the current vehicle speed, and the transmission gear, S230 may include:

determining pedal torque according to the accelerator opening, the current vehicle speed and a pedal map acquired in advance;

comparing the pedal torque with a transmission gear transmission ratio corresponding to a transmission gear to obtain transmission input shaft torque;

the transmission input shaft torque is taken as the driver demand torque.

Specifically, after the vehicle control unit determines current driving parameters such as accelerator opening, current vehicle speed, transmission gear and the like, pedal torque can be determined according to the accelerator opening, the current vehicle speed and a pre-obtained pedal map, the pedal torque and the transmission gear transmission ratio corresponding to the transmission gear are compared to obtain transmission input shaft torque, and the obtained transmission input shaft torque is directly used as driver required torque.

In the disclosed embodiment, the pedal map acquired in advance may include pedal torques corresponding to respective accelerator opening degrees and vehicle speeds.

Accordingly, determining the pedal torque according to the accelerator opening, the current vehicle speed and the pre-acquired pedal map may include:

and according to the accelerator opening and the current vehicle speed, searching a pedal torque corresponding to the accelerator opening and the current vehicle speed from a pedal map obtained in advance to obtain the pedal torque.

To further limit the driver demand torque, in some embodiments of the present disclosure, the transmission input shaft torque is taken as the driver demand torque in a case where the transmission input shaft torque is less than or equal to the sum of the engine maximum torque and the motor maximum torque, and the transmission input shaft torque is less than or equal to the transmission maximum torque limit value.

The engine torque capacity may be a maximum torque of the engine. The generator torque capacity may be the maximum torque capacity of the generator.

It is understood that when power generation is required for the current power battery, the engine target torque may be greater than the driver required torque, and the difference between the engine target torque and the driver required torque may be used as the generator generating torque. Thus, the sum of the engine torque capacity and the motor torque capacity may be the driver torque capacity. Therefore, if the transmission input shaft torque is less than or equal to the sum of the engine torque capacity and the motor torque capacity, it can be determined that the transmission input shaft torque is less than or equal to the driver torque capacity.

Wherein the transmission maximum torque limit value may be a transmission maximum torque.

Specifically, after the vehicle control unit calculates the transmission input shaft torque, the transmission input shaft torque is compared with the sum of the maximum torque of the engine and the maximum torque of the motor, if the transmission input shaft torque is smaller than or equal to the sum of the maximum torque of the engine and the maximum torque of the motor, the transmission input shaft torque is determined to be smaller than or equal to the maximum required torque of the driver, the transmission input shaft torque is further compared with a maximum torque limit value of the transmission, and if the transmission input shaft torque is smaller than or equal to the maximum torque limit value of the transmission, the transmission input shaft torque does not exceed the maximum torque of the transmission, and the transmission input shaft torque is directly used as the required torque of the driver.

In still other embodiments of the present disclosure, after obtaining the transmission input shaft torque by comparing the pedal torque to a quotient of the current vehicle speed and the transmission gear, the method further comprises:

comparing the sum of the engine torque capacity and the motor torque capacity with a transmission torque capacity limit value in the case where the transmission input shaft torque is greater than the sum of the engine torque capacity and the motor torque capacity;

taking the sum of the engine maximum torque and the motor maximum torque as a driver required torque in the case where the sum of the engine maximum torque and the motor maximum torque is less than or equal to a transmission maximum torque limit value;

in the case where the sum of the engine maximum torque and the motor maximum torque is greater than the transmission maximum torque limit value, the transmission maximum torque limit value is taken as the driver required torque.

Specifically, after the vehicle control unit calculates the transmission input shaft torque, the transmission input shaft torque is compared with the sum of the maximum torque of the engine and the maximum torque of the motor, if the transmission input shaft torque is larger than the sum of the maximum torque of the engine and the maximum torque of the motor, the transmission input shaft torque is determined to be larger than the maximum torque required by the driver, the minimum value is taken as the sum of the maximum torque of the engine and the maximum torque of the motor when the transmission input shaft torque and the transmission input shaft torque are larger than the sum of the maximum torque of the engine and the maximum torque of the motor, the sum of the maximum torque of the engine and the maximum torque of the motor is further compared with a maximum torque limit value of the transmission, if the sum of the maximum torque of the engine and the maximum torque of the motor is smaller than or equal to the maximum torque limit value of the transmission, the transmission input shaft torque is determined not to exceed the maximum torque of the transmission, the transmission input shaft torque is directly used as the driver required torque, and if the sum of the maximum torque of the engine and the maximum torque of the motor is larger than the maximum torque limit value of the transmission, the transmission input shaft torque is determined to exceed the maximum torque of the transmission, and the maximum torque limit value of the transmission is used as the driver required torque.

Therefore, in the embodiment of the disclosure, the torque of the input shaft of the transmission can be compared with the sum of the maximum torque of the engine and the maximum torque of the motor and the maximum torque limit value of the transmission respectively to take the minimum value, so that the torque of the input shaft of the transmission is limited, and the torque required by a driver can be prevented from being too large.

In still another embodiment of the present disclosure, in order to accurately calculate the generator generating torque and the engine generating torque, the generator generating torque and the engine generating torque may be calculated according to the driver required torque, the engine target torque, the generator restriction condition, and the engine restriction condition.

In some embodiments of the present disclosure, S230 may include:

subtracting the target torque of the engine from the required torque of the driver to obtain the torque difference between the required torque of the driver and the target torque of the engine;

calculating a generator generating torque according to a torque difference between a driver required torque and an engine target torque and a generator limiting condition;

the engine generated torque is calculated based on a torque difference between the driver required torque and the generator generated torque and the engine limit condition.

In some embodiments of the present disclosure, the generator limit condition may include a generator torque maximum and a maximum charging power of the generator.

Wherein the generator torque maximum may be a maximum torque of the generator. The maximum charging power of the generator may be a maximum generated power of the generator.

In some embodiments, calculating the generator generation torque based on the torque difference between the driver demand torque and the engine target torque and the generator limit condition may include:

in the case where the difference in torque between the driver required torque and the engine target torque is less than or equal to the generator torque maximum value, and the current charging power of the generator is less than or equal to the maximum charging power of the generator, the difference in torque between the driver required torque and the engine target torque is taken as the generator torque.

In other embodiments, calculating the generator generation torque based on the torque difference between the driver demand torque and the engine target torque and the generator limit condition may include:

in the case where the torque difference between the driver required torque and the engine target torque is greater than the generator torque maximum value, and the current charging power of the generator is less than or equal to the maximum charging power of the generator, the generator torque maximum value is taken as the generator torque.

Specifically, after the vehicle control unit determines the driver required torque and the engine target torque, the driver required torque and the engine target torque may be subtracted to obtain a torque difference between the driver required torque and the engine target torque, and if the torque difference between the driver required torque and the engine target torque is less than or equal to a maximum generator torque and a current charging power of the generator is less than or equal to a maximum charging power of the generator, the torque difference between the driver required torque and the engine target torque is used as a generator torque; and if the torque difference between the driver required torque and the engine target torque is larger than the generator torque maximum value and the current charging power of the generator is smaller than or equal to the maximum charging power of the generator, taking the generator torque maximum value as the generator torque.

Therefore, in the process of calculating the torque of the generator, the torque of the generator can be limited by using the maximum torque value of the generator, and the generator can be safely protected by using the maximum charging power of the generator, so that the generator and the current rechargeable battery are prevented from being damaged by too large torque and too large power of the generator.

In some embodiments of the present disclosure, the engine limiting condition may include an engine generated torque maximum.

Wherein the engine generated torque maximum value may be a maximum torque of the engine.

In some embodiments, calculating the engine generated torque based on a torque difference between the driver required torque and the generator generated torque and the engine limit condition includes:

in the case where the difference in torque between the driver required torque and the generator torque is less than or equal to the engine power generation torque maximum value, the difference in torque between the driver required torque and the generator torque is taken as the engine power generation torque.

In other embodiments, calculating the engine generated torque based on the generator generated torque and the engine limiting condition comprises:

in the case where the torque difference between the driver required torque and the generator torque is larger than the engine power generation torque maximum value, the engine power generation torque maximum value is taken as the engine power generation torque.

Specifically, after the vehicle control unit determines the driver demand torque and the generator generation torque, the driver demand torque and the generator generation torque may be subtracted to obtain a torque difference between the driver demand torque and the generator generation torque, and if the torque difference between the driver demand torque and the generator generation torque is less than or equal to the maximum value of the engine generation torque, the torque difference between the driver demand torque and the generator generation torque is used as the engine generation torque; if the torque difference between the driver demand torque and the generator generation torque is greater than the engine generation torque maximum value, the engine generation torque maximum value is taken as the engine generation torque.

Therefore, in the process of calculating the power generation torque of the engine, the torque of the engine can be limited by using the maximum value of the power generation torque of the engine, and the generator can be safely protected to prevent the engine from being damaged due to too large torque of the engine.

Further, after the vehicle control unit determines the power generation torque of the generator and the power generation torque of the engine, the vehicle control unit may send a request corresponding to the power generation torque of the generator to the generator control module, and send a request corresponding to the power generation torque of the engine to the engine control module, so that the generator control module drives the engine control module to generate power based on the power generation torque of the engine according to the power generation torque of the generator, and the purpose of charging the current power battery is achieved.

FIG. 4 illustrates a schematic diagram of a torque distribution provided by an embodiment of the present disclosure.

As shown in fig. 4, after the vehicle control unit determines the target engine torque and the target driver torque, a torque difference between the target driver torque and the target engine torque is calculated to obtain a generator power generation torque, which may be a negative value, and after the vehicle control unit determines the generator power generation torque and the engine power generation torque, the vehicle control unit may send a request corresponding to the generator power generation torque to the generator control module and send a request corresponding to the engine power generation torque to the engine control module, so that the engine drives the generator to generate power based on the motor power generation torque based on the torque between the target engine torque and the target driver torque, so as to charge the current power battery.

In some embodiments of the present disclosure, in order for the engine to power the hybrid vehicle when the current power battery is sufficiently charged, the driver demand torque may be controlled to be equal to the sum of the engine target torque and the generator generation torque when the current power battery is charged to a level greater than the target charge level.

Fig. 5 is a flow chart illustrating another power generation control method provided by the embodiment of the disclosure.

As shown in fig. 5, the power generation control method may include the following steps.

And S510, when the electric quantity of the current power battery is larger than the target electric quantity grade, the torque required by the driver is equal to the sum of the target torque of the engine and the power generation torque of the generator.

Specifically, when the vehicle control unit determines that the electric quantity of the current power battery is larger than the target electric quantity grade, the current power battery does not need to be charged, the engine does not need to drive the generator to generate electricity, and the torque required by the driver is controlled to be equal to the sum of the target torque of the engine and the electricity generation torque of the generator.

In the disclosed embodiment, the vehicle control unit may predetermine power levels, each of which may be used to characterize a degree of starting of the engine. Alternatively, the electric quantity levels may include three levels L1, L2 and L3, each level representing a decrease in the degree of starting of the generator in turn. Where L2 may be a target charge level.

For example, when the current power battery has a capacity greater than L2 and less than or equal to L3 level, it indicates that the current power battery has a very sufficient capacity, the engine is not started basically, the hybrid vehicle is driven mainly by the motor, and the large under-throttle engine is also used for the purpose of assisting the electric driving and does not charge the battery.

And S520, when the electric quantity of the current power battery is smaller than or equal to the target electric quantity level, determining the target torque of the engine within the target fuel economy interval.

And the target electric quantity grade is the maximum electric quantity grade for starting the engine to generate electricity.

And S530, calculating the torque required by the driver according to the current driving parameters.

And S540, calculating generator generating torque and engine generating torque according to the driver required torque and the engine target torque.

And S550, controlling the engine to drive the generator to generate power based on the generator generating torque and the engine generating torque.

S520 to S550 are similar to S210 to S240 described above, and are not described herein again.

Therefore, in the embodiment of the disclosure, when the vehicle control unit determines that the electric quantity of the current power battery is less than or equal to the target electric quantity level, the engine is controlled to drive the generator to generate power, and when the electric quantity of the current power battery is greater than the target electric quantity level, the engine is not started to be controlled to drive the generator to generate power, so that the engine provides power for the hybrid vehicle.

The embodiment of the present disclosure also provides a power generation control device for implementing the power generation control method, which is described below with reference to fig. 6. In the disclosed embodiment, the power generation control device may be an electronic apparatus. The electronic device may include a mobile terminal, a tablet computer, a vehicle-mounted terminal, a wearable electronic device, a Virtual Reality (VR) all-in-one machine, an intelligent home device, and other devices having a communication function.

Fig. 6 shows a schematic structural diagram of a power generation control device provided in an embodiment of the present disclosure.

As shown in fig. 6, the power generation control device 600 may include: an engine target torque determination module 610, a first torque calculation module 620, a second torque calculation module 630, and a power generation control module 640.

The engine target torque determining module 610 is configured to determine an engine target torque of the engine within a target fuel economy interval when the current electric quantity of the power battery is less than or equal to a target electric quantity level, where the target electric quantity level is a maximum electric quantity level for starting power generation of the engine;

a first torque calculation module 620 for calculating a driver demand torque according to the current driving parameters;

a second torque calculation module 630 for calculating a generator generation torque and an engine generation torque according to the driver required torque and the engine target torque;

and the power generation control module 640 is used for controlling the engine to drive the generator to generate power based on the generator power generation torque and the engine power generation torque.

In the embodiment of the disclosure, when the electric quantity of the current power battery is less than or equal to the target electric quantity grade, the target torque of the engine in the target fuel economy zone of the engine can be determined, so that the engine works in the target fuel economy zone, the torque required by the driver is calculated according to the current driving parameters, the power generation torque of the generator and the power generation torque of the engine are further calculated according to the torque required by the driver and the target torque of the engine, and then the engine working in the target fuel economy zone is controlled to drive the generator to generate power based on the power generation torque of the generator and the power generation torque of the engine, so that the engine charges the current power battery while consuming less fuel, and the overall fuel consumption of the hybrid electric vehicle is reduced.

Optionally, the first torque calculation module 620 is specifically configured to control the transmission to adjust the current gear to the target gear;

determining a target rotating speed of the engine in a target fuel economy range according to the target gear and the current vehicle speed;

and determining the target torque of the engine according to the corresponding relation between the rotating speed and the torque in the target fuel economy interval and the target rotating speed.

Optionally, the current driving parameters include: accelerator opening, current vehicle speed and transmission gear;

correspondingly, the first torque calculation module 620 is specifically configured to determine a pedal torque according to the accelerator opening, the current vehicle speed, and a pedal map acquired in advance;

comparing the pedal torque with a transmission gear transmission ratio corresponding to a transmission gear to obtain transmission input shaft torque;

the transmission input shaft torque is taken as the driver demand torque.

Optionally, the first torque calculation module 620 is specifically configured to use the transmission input shaft torque as the driver requested torque if the transmission input shaft torque is less than or equal to a sum of the engine torque capacity and the motor torque capacity and the transmission input shaft torque is less than or equal to the transmission torque capacity limit.

Optionally, the apparatus further comprises:

a torque comparison module;

the torque comparison module is used for comparing the sum of the maximum torque of the engine and the maximum torque of the motor with the maximum torque limit value of the transmission under the condition that the torque of the input shaft of the transmission is larger than the sum of the maximum torque of the engine and the maximum torque of the motor;

the first torque calculation module 620 is specifically configured to take the sum of the engine torque capacity and the motor torque capacity as the driver demand torque if the sum of the engine torque capacity and the motor torque capacity is less than or equal to the transmission torque capacity limit value;

in the case where the sum of the engine maximum torque and the motor maximum torque is greater than the transmission maximum torque limit value, the transmission maximum torque limit value is taken as the driver required torque.

Optionally, the second torque calculation module 630 is specifically configured to subtract the driver required torque from the engine target torque to obtain a torque difference between the driver required torque and the engine target torque;

calculating a generator generating torque according to a torque difference between a driver required torque and an engine target torque and a generator limiting condition;

the engine generated torque is calculated based on a torque difference between the driver required torque and the generator generated torque and the engine limit condition.

Optionally, the generator limitation condition comprises a maximum generator torque and a maximum charging power of the generator;

accordingly, the second torque calculation module 630 is specifically configured to use the difference between the driver required torque and the engine target torque as the generator torque in the case that the difference between the driver required torque and the engine target torque is less than or equal to the maximum generator torque and the current charging power of the generator is less than or equal to the maximum charging power of the generator.

Optionally, the engine limiting condition comprises a maximum value of engine generated torque;

accordingly, the second torque calculation module 630 is specifically configured to use the difference between the driver required torque and the generator torque as the engine generating torque when the difference between the driver required torque and the generator torque is less than or equal to the maximum value of the engine generating torque.

Optionally, the first torque calculation module 620 is further configured to, when the current power battery charge is not greater than the target charge level, equal the driver demand torque to the sum of the engine target torque and the generator generated torque.

It should be noted that the power generation control device 600 shown in fig. 6 may execute each step in the method embodiments shown in fig. 2 to fig. 5, and implement each process and effect in the method embodiments shown in fig. 2 to fig. 5, which are not described herein again.

Fig. 7 shows a schematic structural diagram of a vehicle control unit provided by the embodiment of the disclosure.

As shown in fig. 7, the vehicle control unit may include a processor 701 and a memory 702 storing computer program instructions.

Specifically, the processor 701 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of the embodiments of the present Application.

Memory 702 may include a mass storage for information or instructions. By way of example, and not limitation, memory 702 may include a Hard Disk Drive (HDD), a floppy Disk Drive, flash memory, an optical Disk, a magneto-optical Disk, tape, or a Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 702 may include removable or non-removable (or fixed) media, where appropriate. The memory 702 may be internal or external to the integrated gateway device, where appropriate. In a particular embodiment, the memory 702 is non-volatile solid-state memory. In a particular embodiment, the Memory 702 includes a Read-Only Memory (ROM). The ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (Electrically Erasable PROM, EPROM), Electrically Erasable PROM (Electrically Erasable PROM, EEPROM), Electrically Alterable ROM (Electrically Alterable ROM, EAROM), or flash memory, or a combination of two or more of these, where appropriate.

The processor 701 reads and executes the computer program instructions stored in the memory 702 to perform the steps of the data acquisition method provided by the embodiments of the present disclosure.

In one example, the vehicle may also include a transceiver 703 and a bus 704. As shown in fig. 7, the processor 701, the memory 702, and the transceiver 703 are connected via a bus 704 to complete communication therebetween.

Bus 704 includes hardware, software, or both. By way of example, and not limitation, a BUS may include an Accelerated Graphics Port (AGP) or other Graphics BUS, an Enhanced Industry Standard Architecture (EISA) BUS, a Front-Side BUS (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) BUS, an InfiniBand interconnect, a Low Pin Count (LPC) BUS, a memory Bus, a Micro Channel Architecture (MCA) Bus, a Peripheral Component Interconnect (PCI) Bus, a PCI-Express (PCI-X) Bus, a Serial Advanced Technology Attachment (SATA) Bus, a Video Electronics Standards Association Local Bus (VLB) Bus, or other suitable Bus, or a combination of two or more of these. Bus 704 may include one or more buses, where appropriate. Although specific buses are described and shown in the embodiments of the application, any suitable buses or interconnects are contemplated by the application.

The following is an embodiment of a computer-readable storage medium provided in an embodiment of the present disclosure, the computer-readable storage medium and the power generation control method of the foregoing embodiments belong to the same inventive concept, and details that are not described in detail in the embodiment of the computer-readable storage medium may refer to the embodiment of the power generation control method.

The present embodiments provide a storage medium containing computer-executable instructions that, when executed by a computer processor, are operable to perform a method of power generation control, the method comprising:

when the electric quantity of the current power battery is smaller than or equal to a target electric quantity grade, determining the target torque of the engine within a target fuel economy interval, wherein the target electric quantity grade is the maximum electric quantity grade for starting the power generation of the engine;

calculating the torque required by the driver according to the current driving parameters;

calculating the power generation torque of the generator and the power generation torque of the engine according to the torque required by the driver and the target torque of the engine;

and controlling the engine to drive the generator to generate power based on the power generation torque of the generator and the power generation torque of the engine.

Of course, the storage medium provided by the embodiments of the present disclosure contains computer-executable instructions, and the computer-executable instructions are not limited to the method operations described above, and may also perform related operations in the power generation control method provided by any embodiments of the present disclosure.

From the above description of the embodiments, it is obvious for a person skilled in the art that the present disclosure can be implemented by software and necessary general hardware, and certainly can be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present disclosure may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk, or an optical disk of a computer, and includes several instructions to enable a computer cloud platform (which may be a personal computer, a server, or a network cloud platform, etc.) to execute the power generation control method provided in the embodiments of the present disclosure.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present disclosure and the technical principles employed. Those skilled in the art will appreciate that the present disclosure is not limited to the particular embodiments described herein, and that various obvious changes, adaptations, and substitutions are possible, without departing from the scope of the present disclosure. Therefore, although the present disclosure has been described in greater detail with reference to the above embodiments, the present disclosure is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present disclosure, the scope of which is determined by the scope of the appended claims.