阅读说明：本技术 混合动力车辆及其控制方法、整车控制器和存储介质 (Hybrid vehicle, control method thereof, vehicle control unit and storage medium ) 是由 孙启宴 余俊鑫 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种混合动力车辆及其控制方法、整车控制器和存储介质,其中,混合动力车辆包括发动机和驱动电机,所述混合动力车辆控制方法包括：获取油门开度信息、整车需求扭矩信息和车速信息；根据所述油门开度信息、所述整车需求扭矩信息和所述车速信息控制所述发动机和所述驱动电机,其中,控制所述发动机输出发动机目标转速对应的经济区扭矩值或停机。本发明实施例的方法和车辆,可以使得发动机始终工作在经济区,降低整车能耗。(The invention discloses a hybrid vehicle and a control method thereof, a vehicle control unit and a storage medium, wherein the hybrid vehicle comprises an engine and a driving motor, and the control method of the hybrid vehicle comprises the following steps: acquiring accelerator opening information, finished automobile required torque information and automobile speed information; and controlling the engine and the driving motor according to the accelerator opening information, the finished automobile required torque information and the automobile speed information, wherein the engine is controlled to output an economic area torque value corresponding to the target engine rotating speed or stop. The method and the vehicle provided by the embodiment of the invention can enable the engine to always work in an economic area, and reduce the energy consumption of the whole vehicle.)

1. A hybrid vehicle control method characterized in that a hybrid vehicle includes an engine and a drive motor, the hybrid vehicle control method comprising:

acquiring accelerator opening information, finished automobile required torque information and automobile speed information;

and controlling the engine and the driving motor according to the accelerator opening information, the finished automobile required torque information and the automobile speed information, wherein the engine is controlled to output an economic area torque value corresponding to the target engine rotating speed or stop.

2. The hybrid vehicle control method according to claim 1, wherein the controlling the engine and the motor according to the accelerator opening degree information, the entire vehicle required torque information, and the vehicle speed information includes:

determining that the accelerator opening value is smaller than a first preset opening value and larger than zero according to the accelerator opening information, and determining that the finished automobile required torque value is smaller than a preset torque value according to the finished automobile required torque information, wherein the preset torque value is smaller than an economic area torque value corresponding to the target rotating speed of the engine;

and controlling the driving motor to drive until the torque value required by the whole vehicle reaches the torque value in the economic area corresponding to the target rotating speed of the engine, determining that the vehicle speed value reaches the vehicle speed value for starting the engine according to the vehicle speed information, and controlling the engine to start and output the torque value in the economic area.

3. The hybrid vehicle control method according to claim 1, wherein the controlling the engine and the drive motor according to the accelerator opening degree information, the entire vehicle required torque information, and the vehicle speed information includes:

determining that an accelerator opening value is smaller than a first preset opening value and larger than zero according to the accelerator opening information, determining that a finished automobile required torque value is smaller than a preset torque value according to the finished automobile required torque information, and determining that the automobile speed is within a range of allowing the engine to be stopped according to the automobile speed information, wherein the preset torque value is smaller than an economic area torque value corresponding to the target engine speed;

and controlling the engine to stop and controlling the driving motor to output the torque required by the whole vehicle.

4. The hybrid vehicle control method according to claim 1, wherein the controlling the engine and the drive motor according to the accelerator opening degree information, the entire vehicle required torque information, and the vehicle speed information includes:

determining that the accelerator opening value is larger than a second preset opening value according to the accelerator opening information;

controlling the engine to output an economic zone torque value corresponding to the target engine speed;

obtaining a compensation torque value according to the finished automobile demand torque value and the economic zone torque value;

and controlling the driving motor to output the compensation torque value.

5. The hybrid vehicle control method according to any one of claims 2 to 4, wherein, before controlling the drive motor to drive, the engine and the drive motor are controlled in accordance with the accelerator opening degree information, the entire vehicle required torque information, and the vehicle speed information, further comprising:

acquiring the electric quantity of a battery;

the battery power is higher than the preset power, and the driving motor is controlled to drive;

and the electric quantity of the battery is lower than the preset electric quantity, and reminding is carried out.

6. The hybrid vehicle control method according to claim 1, wherein the controlling the engine and the drive motor according to the accelerator opening degree information, the entire vehicle required torque information, and the vehicle speed information includes:

determining that the accelerator opening value is smaller than a first preset opening value according to the accelerator opening information, and determining that a finished automobile required torque value is smaller than a preset torque value according to the finished automobile required torque information, wherein the preset torque value is smaller than an economic area torque value corresponding to a target engine rotating speed;

controlling the engine to output an economic zone minimum torque value corresponding to the target engine speed;

obtaining a feedback torque value according to the minimum torque value of the economic area and the required torque value of the whole vehicle;

and controlling the driving motor or the BSG motor of the hybrid vehicle to generate power according to the feedback torque value.

7. A non-transitory computer storage medium, characterized by having stored thereon a computer program that, when executed, implements the hybrid vehicle control method of any one of claims 1-6.

8. A vehicle control unit, comprising:

a processor;

a memory communicatively coupled to the processor;

wherein the memory has stored therein computer instructions executable by the processor, the computer instructions when executed by the processor implementing the hybrid vehicle control method of any one of claims 1-6.

9. A hybrid vehicle, characterized by comprising:

the system comprises a power battery, an engine controller, a driving motor and a driving motor controller;

the vehicle speed sensor is used for acquiring vehicle speed information;

the accelerator sensor is used for acquiring the opening information of the accelerator;

the vehicle control unit of claim 8, wherein the vehicle control unit is coupled to the engine controller and the motor controller, respectively.

10. The hybrid vehicle according to claim 9, characterized by further comprising a BSG motor and a BSG motor controller, the BSG motor controller being connected with the vehicle control unit, the BSG motor, and the power battery, respectively.

Technical Field

The invention relates to the technical field of vehicles, in particular to a hybrid vehicle control method, a computer storage medium storing the hybrid vehicle control method, a vehicle control unit and a hybrid vehicle.

Background

The power system of the hybrid power vehicle of P0+ P4 mainly comprises an engine, a BSG motor controller, a driving motor controller, a transmission and a power battery, wherein the BSG motor can realize the starting and stopping functions of the engine, and the fuel economy is improved. In order to ensure that the engine works in a high-efficiency area in most of time, the vehicle is driven by the driving motor under the low-speed working condition of a hybrid mode, after the speed of the vehicle reaches a certain value (usually about 30km/h), the engine is started, the engine alone or together with the driving motor outputs power, when the throttle is released, the throttle opening reaches 0, the engine stops, the driving motor carries out energy feedback, and when the throttle is continuously deepened to accelerate, the engine is started by the BSG motor.

However, after the vehicle speed is greater than the vehicle speed at which the engine is started, and when the driver reduces the accelerator opening after the vehicle continues to run, the total required torque of the whole vehicle is reduced, and under the condition that the VCU completely distributes the torque of the whole vehicle to the engine drive, the torque of the engine still cannot reach the minimum torque of the corresponding economic area at the rotating speed, and the requirement of reducing the energy consumption of the whole vehicle cannot be met.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

Therefore, a first object of the present invention is to provide a hybrid vehicle control method, which can make the engine always work in the economic zone, and reduce the energy consumption of the whole vehicle.

A second object of the invention is to propose a non-transitory computer storage medium.

The third purpose of the invention is to provide a vehicle control unit.

A fourth object of the invention is to propose a hybrid vehicle.

In order to achieve the above object, a hybrid vehicle control method of an embodiment of a first aspect of the invention, wherein the hybrid vehicle includes an engine and a drive motor, includes: acquiring accelerator opening information, finished automobile required torque information and automobile speed information; and controlling the engine and the driving motor according to the accelerator opening information, the finished automobile required torque information and the automobile speed information, wherein the engine is controlled to output an economic area torque value corresponding to the target engine rotating speed or stop.

According to the control method of the hybrid vehicle, based on the accelerator opening information, the whole vehicle required torque information and the vehicle speed information, the engine is controlled to stop or the engine is controlled to start or work, and the torque value of the economic zone corresponding to the target rotating speed of the engine is output, namely the engine works in the economic zone corresponding to the target rotating speed of the engine.

In order to achieve the above object, a non-transitory computer storage medium according to an embodiment of a second aspect of the present invention has stored thereon a computer program that, when executed, implements the hybrid vehicle control method.

In order to achieve the above object, a vehicle control unit according to a third aspect of the present invention includes: a processor; a memory communicatively coupled to the processor; wherein the memory has stored therein computer instructions executable by the processor, the computer instructions when executed by the processor implementing the hybrid vehicle control method.

According to the vehicle control unit provided by the embodiment of the invention, the processor executes the method of the embodiment, so that the engine can basically work in an economic area, and the energy consumption of the vehicle is reduced.

In order to achieve the above object, a hybrid vehicle according to a fourth aspect of the present invention includes: the system comprises a power battery, an engine controller, a driving motor and a driving motor controller; the vehicle speed sensor is used for acquiring vehicle speed information; the accelerator sensor is used for acquiring the opening information of the accelerator; and the vehicle control unit is respectively connected with the engine controller and the motor controller.

According to the hybrid vehicle disclosed by the embodiment of the invention, the vehicle controller executes the method disclosed by the embodiment, so that the engine basically works in an economic area, and the energy consumption of the whole vehicle is reduced.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a flowchart of a hybrid vehicle control method according to an embodiment of the invention;

FIG. 2 is a block diagram of a hybrid vehicle controller according to an embodiment of the present invention;

fig. 3 is a block diagram of a hybrid vehicle according to an embodiment of the invention;

FIG. 4 is a schematic illustration of an engine intervening vehicle operating condition under low torque demand conditions, according to an embodiment of the present disclosure.

Detailed Description

Embodiments of the present invention will be described in detail below, and the embodiments described with reference to the drawings are exemplary.

For a hybrid power vehicle of P0+ P4, the requirement of reducing the energy consumption of the whole vehicle cannot be well met by adopting a start-stop control strategy in the prior art. For example, based on data of city conditions of a hybrid vehicle of a certain model P0+ P4, when the vehicle speed is about 40km/h, the accelerator opening fluctuates by 10%, the actual output torque of the engine is lower than the minimum torque of the engine economy zone corresponding to the rotation speed, for example, about 100N, the driving motor does not output power, and the engine is always operated in the non-economy zone. Through statistics of the working range of the engine under the urban working condition of the vehicle type, the economic area of the engine is only 25%, and the energy consumption of the whole vehicle is higher. Wherein, for the hybrid vehicle of the vehicle type, the engine economy zone can be a power torque zone with the fuel consumption rate less than 260 g/KwH.

In order to solve the above problems, embodiments of the present invention provide a hybrid vehicle control method, which can operate an engine in an economic area and reduce energy consumption of a whole vehicle.

A control method of a hybrid vehicle according to an embodiment of the first aspect of the invention is described below with reference to the drawings.

Fig. 1 is a flowchart of a hybrid vehicle control method according to an embodiment of the invention, which includes at least steps S1 and S2, each of which is described in detail below, as shown in fig. 1.

And S1, acquiring accelerator opening information, vehicle required torque information and vehicle speed information.

For example, an accelerator sensor of the vehicle detects accelerator opening information and transmits the accelerator opening information to a vehicle bus; the vehicle speed information of the vehicle detects the vehicle speed information and sends the vehicle speed information to the vehicle bus, the vehicle controller can obtain various state information of the vehicle through the vehicle bus, for example, the state information comprises accelerator opening degree information and vehicle speed information, and the vehicle controller can obtain the required torque information of the whole vehicle by integrating the bus information of the vehicle, such as information of an accelerator, a gear, braking and the like.

And S2, controlling the engine and the driving motor according to the accelerator opening information, the vehicle required torque information and the vehicle speed information, wherein the engine is controlled to output an economic area torque value corresponding to the target rotating speed of the engine or stop.

In the embodiment, the starting, working or stopping of the engine is controlled by integrating the accelerator opening information, the finished automobile required torque information and the automobile speed information, the engine is controlled to provide power of an economic area corresponding to the target rotating speed of the engine when the engine is started or works, and the transmitter can work in the economic area when working or starting, so that the energy consumption of the finished automobile can be reduced.

According to the control method of the hybrid vehicle, the engine is controlled to stop or the engine is controlled to start or output the torque value of the economic zone corresponding to the target rotating speed of the engine when the engine works, namely the engine works in the economic zone corresponding to the target rotating speed of the engine, based on the accelerator opening information, the whole vehicle required torque information and the vehicle speed information.

The following describes a process of controlling an engine and a driving motor according to accelerator opening information, vehicle required torque information and vehicle speed information under different working conditions.

In some embodiments, determining that the accelerator opening value is smaller than a first preset opening value and larger than zero according to the accelerator opening information, and determining that the vehicle demand torque value is smaller than a preset torque value according to the vehicle demand torque information, wherein the preset torque value is smaller than an economy zone torque value corresponding to the target engine speed; and controlling the driving motor to drive until the torque value required by the whole vehicle reaches the torque value in the economic area corresponding to the target rotating speed of the engine, determining that the vehicle speed value reaches the vehicle speed value for starting the engine according to the vehicle speed information, and controlling the engine to start and output the torque value in the economic area.

For example, when the accelerator opening is low, for example, lower than 20%, the vehicle demand torque is small, and the economy zone torque corresponding to the target engine speed cannot be reached, the vehicle is driven by the driving motor, that is, the engine is delayed to start until the vehicle demand torque value reaches the economy zone torque value corresponding to the target engine speed, and the vehicle speed meets the engine starting condition, the engine is controlled to start, the vehicle controller can distribute the vehicle demand torque to the engine, and the engine can work in the economy zone at this time, so that the energy consumption during starting can be reduced.

In other words, in the embodiment of the invention, the engine starting time is defined by the vehicle speed, the accelerator opening and the vehicle required torque are also considered, the engine is started in a delayed manner under the working conditions of low accelerator opening and low vehicle required torque, and when the vehicle required torque reaches the corresponding torque value of the economy zone, such as the minimum torque value of the economy zone, of the engine at the rotating speed, the engine is started, so that the engine can work in the economy zone when being started, and the energy consumption is low.

In some embodiments, in response to a stop instruction, determining that an accelerator opening value is smaller than a first preset opening value and larger than zero according to accelerator opening information, determining that a vehicle demand torque value is smaller than a preset torque value according to vehicle demand torque information, and determining that a vehicle speed is within a range of a vehicle speed allowing an engine to stop according to vehicle speed information, wherein the preset torque value is smaller than an economic zone torque value corresponding to a target engine speed; and controlling the engine to stop and controlling the driving motor to output the torque required by the whole vehicle.

For example, the accelerator opening degree is considered when the engine is stopped, when the accelerator opening degree is lower than 20%, for example, the required torque of the whole vehicle is smaller, the minimum torque requirement of an economic area corresponding to the target rotating speed of the engine cannot be met or the minimum torque value of the economic area is more deviated, the vehicle speed range allows the engine to be stopped, the engine can be stopped, the engine is not required to be controlled to stop until the accelerator opening degree reaches zero, the time of the engine working in a non-economic area, namely a high energy consumption area, is shortened, and the energy consumption of the whole vehicle can be reduced.

That is to say, in the embodiment of the present invention, the engine stop timing does not use the accelerator opening as a flag bit, and also refers to the required torque of the entire vehicle, if the accelerator opening is reduced to a first preset opening, for example, less than or equal to 20%, and the required torque of the entire vehicle is small, the engine is stopped in advance, and the driving motor is switched to drive the vehicle, so that the time of the engine working in a non-economic area can be reduced, and the energy consumption of the entire vehicle can be reduced.

In other embodiments, during the running of the vehicle, determining that the accelerator opening value is greater than a second preset opening value according to the accelerator opening information; controlling the engine to output an economic zone torque value corresponding to the target engine speed; obtaining a compensation torque value according to the finished automobile demand torque value and the economic zone torque value; and controlling the driving motor to output a compensation torque value.

That is to say, when the accelerator aperture is great, whole car demand torque is great, and whole car controller distributes whole car demand torque to the engine with the priority, guarantees that the engine work is in economic district, and the moment of torsion is not enough then compensates through driving motor to this avoids the engine to work in non-economic district, reduces whole car energy consumption.

Further, in an embodiment, before controlling the driving motor to output the torque to drive the vehicle, the battery power is acquired; the battery power is higher than the preset power, and the driving of the driving motor is controlled; the battery electric quantity is lower than the preset electric quantity, and reminding is carried out. That is, in the HEV mode, when the engine is started late or stopped early or compensation torque needs to be provided, the battery capacity is ensured to be sufficient, and the battery is prevented from being over-discharged, causing damage to the battery and affecting the service life of the battery.

In other embodiments, determining that the accelerator opening value is smaller than a first preset opening value according to the accelerator opening information, and determining that the vehicle demand torque value is smaller than a preset torque value according to the vehicle demand torque information, wherein the preset torque value is smaller than an economic area torque value corresponding to the target engine speed; controlling the engine to output the minimum torque value of the economic area corresponding to the target rotating speed of the engine; obtaining a feedback torque value according to the minimum torque value of the economic area and the torque value required by the whole vehicle; and controlling the drive motor or the BSG motor of the hybrid vehicle to generate power according to the feedback torque value to perform feedback.

For example, if the engine is not allowed to stop due to the vehicle speed and other reasons, the engine torque is still maintained in the corresponding torque range of the economy zone under the target rotating speed of the engine, the fluctuation is not reduced along with the opening degree of the accelerator, the minimum torque of the economy zone of the engine corresponding to the target rotating speed of the engine is used for enabling the motor to generate power after subtracting the required torque of the whole vehicle, namely, the redundant torque is used for BSG power generation or driving motor feedback, the engine is ensured to work in the economy zone all the time, and the energy consumption of the whole vehicle is reduced.

That is to say, the driving motor feedback strategy is not defined by taking the accelerator opening as 0, and when the engine is started and the torque required by the whole vehicle is low, the driving motor feedback or BSG power generation function is started, namely the engine drives and generates power at the same time, so that the engine is ensured to work in an economic area, and the energy consumption of the whole vehicle is reduced.

In summary, the hybrid vehicle control method of the embodiment of the invention can increase the probability of the engine working in the economic area, reduce the time of working in the non-economic area, and reduce the energy consumption of the whole vehicle. For example, through counting the working interval of the engine under urban working conditions by adopting the method of the embodiment of the invention for a certain hybrid vehicle type (P0+ P4), the occupation ratio of the economic zone of the engine is improved to 55% from 25% by adopting the existing scheme, wherein the fuel consumption rate of the whole vehicle in the economic zone of the engine is less than 260 g/KwH.

Based on the hybrid vehicle control method of the above embodiment, a non-transitory computer storage medium of an embodiment of a second aspect of the invention, on which a computer program is stored, that when executed, implements the hybrid vehicle control method of the above embodiment.

In a second aspect of the present invention, a vehicle control unit is provided, as shown in fig. 2, a vehicle control unit 10 according to an embodiment of the present invention includes a processor 11 and a memory 12 communicatively connected to the processor 11; in which a memory 12 stores therein computer instructions executable by the processor 11, the computer instructions, when executed by the processor 11, implementing the hybrid vehicle control method of the above embodiment.

According to the vehicle control unit 10 of the embodiment of the invention, the processor 11 executes the method of the above embodiment, so that the engine can basically work in an economic area, and the energy consumption of the vehicle is reduced.

As shown in fig. 3, a hybrid vehicle 100 according to a fourth aspect of the present invention includes a power battery 20, an engine 30, an engine controller 40, a drive motor 50 and a drive motor controller 60, a vehicle speed sensor 70, an accelerator sensor 80, and the vehicle control unit 10 according to the above embodiment.

The vehicle speed sensor 70 is used for acquiring vehicle speed information; the accelerator sensor 80 is used for collecting the opening information of the accelerator; the vehicle control unit 10 is connected to the engine controller 40 and the motor drive controller 60, respectively. The vehicle control unit 10 is configured to execute the hybrid vehicle control method of the above embodiment.

The hybrid vehicle 100 further includes a BSG motor 90 and a BSG motor controller 91, and the BSG motor controller 90 is connected to the vehicle control unit 10, the BSG motor 90, and the power battery 20, respectively.

For example, fig. 4 is a schematic diagram of a low-torque-demand engine intervening in a vehicle-finishing mode according to an embodiment of the present invention, as shown in fig. 4, in the HEV mode, when the power battery 20 is fully charged, the engine 30 is started or stopped in consideration of the accelerator opening, when the accelerator opening is low (e.g., less than 20%), the vehicle-finishing torque is small, and the vehicle speed range allows the engine 30 to be stopped, the engine 30 can be stopped, or the engine 30 can be delayed from starting, and the vehicle can be driven by the driving motor 50; when the accelerator opening is large, the vehicle control unit 10 preferentially distributes the torque required by the vehicle to the engine 30, so as to ensure that the engine 30 works in an economic area and the torque is insufficient and is compensated by the driving motor 50. On the other hand, if the engine 30 is not stopped for some reasons, such as the influence of the vehicle speed range, but the accelerator opening is low (e.g., lower than 20%), when the required torque of the entire vehicle is small, the required torque of the entire vehicle is subtracted from the minimum torque of the economic zone of the engine corresponding to the target rotational speed of the engine, and then the minimum torque of the engine is used for generating power for the driving motor 50 and/or the BSG motor 90, so that the engine 30 is ensured to always work in the economic zone, and the energy consumption of the entire vehicle is reduced.

According to the hybrid vehicle 100 of the embodiment of the invention, the vehicle controller 10 executes the method of the above embodiment, so that the engine basically works in an economic area, and the vehicle reduces energy consumption.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.