CN114670805A

CN114670805A - Torque distribution method and distribution device for parallel hybrid vehicle

Info

Publication number: CN114670805A
Application number: CN202210478719.0A
Authority: CN
Inventors: 郭丁伊; 于长虹; 刘元治; 徐家良; 尹建坤; 宋浩源; 程健; 郁大嵬
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-06-28

Abstract

The embodiment of the disclosure discloses a torque distribution method and a distribution device for a parallel hybrid vehicle, wherein the torque distribution method comprises the following steps: determining a current working condition of the vehicle based on a current state parameter of the vehicle; acquiring the current SOC state of a power battery in the vehicle; distributing torque between the engine and the driving motor based on the current working condition and the current SOC state. The embodiment of the disclosure starts from two aspects of running working condition and battery energy management of a hybrid vehicle, and performs torque distribution on an engine and a motor under different working conditions, so that the requirement of a driver and the requirement of energy management are met, and the dual requirements of the dynamic property and the economical efficiency of the whole vehicle are met.

Description

Torque distribution method and distribution device for parallel hybrid vehicle

Technical Field

The embodiment of the disclosure relates to the technical field of hybrid vehicle control, in particular to a torque distribution method and a torque distribution device for a parallel hybrid vehicle.

Background

With the rapid development of global economy, energy and environmental problems become more prominent, and energy conservation and environmental protection become important challenges facing countries in the world. The low-carbon economic policy in the world promotes the development of new energy automobiles, and the technical progress, industrialization and application of the new energy automobiles drive the development of upstream and downstream industries and bring fundamental changes to the transportation and trip of human beings. As a new energy automobile technology capable of effectively reducing automobile energy consumption, the hybrid electric vehicle technology has become one of the focuses of convergence of governments, enterprises and scientific research institutions all over the world.

The hybrid power system has low cost and low mass, and can realize the oil saving rate of 12 percent (under the NEDC circulation working condition) for the traditional fuel vehicle. On the premise of not changing the required torque, the torques of the engine and the BSG motor are reasonably distributed, the working point of the engine is controlled in the most efficient range, and the purpose of minimum oil consumption is achieved. At present, in the prior art, only the engine start-stop condition or the battery SOC threshold value is considered in the torque distribution process of the hybrid vehicle, and the requirements of the hybrid vehicle on energy conservation and economy still need to be improved.

Disclosure of Invention

The embodiment of the disclosure provides a torque distribution method, a distribution device, a storage medium and electronic equipment for a parallel hybrid vehicle, so as to at least solve the technical problem that the existing hybrid vehicle cannot meet the requirements of the vehicle on energy conservation and economy in the torque distribution process.

According to an aspect of an embodiment of the present disclosure, there is provided a torque distribution method for a hybrid vehicle, including: determining a current working condition of the vehicle based on a current state parameter of the vehicle; acquiring the current SOC state of a power battery in the vehicle; distributing torque between the engine and the driving motor based on the current working condition and the current SOC state.

In one exemplary embodiment, the current operating condition includes at least one of a rapid acceleration operating condition, a normal driving operating condition, and a braking operating condition.

In one exemplary embodiment, the hard acceleration condition or the normal driving condition is determined by at least an accelerator opening and a throttle opening change rate.

In one exemplary embodiment, distributing torque between the engine and the electric machines based on the current operating conditions and the current SOC state comprises: and under the condition that the current working condition is determined, torque distribution is carried out based on a comparison result between the current SOC state and an SOC threshold value, wherein the SOC threshold value at least comprises a first SOC threshold value, a second SOC threshold value, a third SOC threshold value, a fourth SOC threshold value and a fifth SOC threshold value which are sequentially increased.

In one exemplary embodiment, when the current operating condition is a rapid acceleration condition, torque distribution is performed based on a comparison of the current SOC state with a first SOC threshold.

In one exemplary embodiment, when the current working condition is a normal driving working condition, torque distribution is performed based on the comparison result of the current SOC state and a third SOC threshold value and a fourth SOC threshold value respectively

In one exemplary embodiment, when the current operating condition is a braking condition, torque distribution is performed based on the comparison result of the current SOC state with the second SOC threshold and the fifth SOC threshold, respectively.

In one exemplary embodiment, torque distribution based on a comparison of the recovered power and accessory power when the current SOC state is less than the fifth SOC threshold comprises, in one exemplary embodiment, determining an indicated torque of the engine based on gear and engine speed comprising: and determining the indicated torque of the engine and the indicated torque of the full throttle at different gears and different engine speeds.

In a second aspect, embodiments of the present disclosure also provide a torque distribution device for a parallel hybrid vehicle, including: determining means for determining a current operating condition of the vehicle based on a current state parameter of the vehicle; the acquiring device is used for acquiring the current SOC state of a power battery in the vehicle; and the distribution device is used for distributing the torque between the engine and the driving motor based on the current working condition and the current SOC state.

In a third aspect, an embodiment of the present disclosure further provides a computer-readable storage medium storing a computer program for executing the torque distribution method for a hybrid vehicle described in any one of the above technical solutions.

In a fourth aspect, an embodiment of the present disclosure further provides an electronic device, where the electronic device includes: a processor; a memory for storing the processor-executable instructions; the processor is configured to execute the torque distribution method for the hybrid vehicle according to any one of the above technical solutions.

From the above, the embodiment of the disclosure starts from two aspects of the driving condition and the battery energy management of the hybrid vehicle, and performs torque distribution on the engine and the motor under different conditions, so as to better meet the requirements of the driver and the energy management, and meet the dual requirements of the dynamic property and the economical efficiency of the whole vehicle.

In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

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

FIG. 1 is a schematic step diagram of a torque split method for a hybrid vehicle provided by the present disclosure;

FIG. 2 is a schematic representation of the engine efficient operating zone provided by the present disclosure;

FIG. 3 is a block diagram of a torque distribution device for a hybrid vehicle provided by the present disclosure;

fig. 4 is a block diagram of an electronic device provided by the present disclosure.

Detailed Description

Specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, but the present disclosure is not limited thereto.

It will be understood that various modifications may be made to the embodiments disclosed herein. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Other modifications will occur to those skilled in the art within the scope and spirit of the disclosure.

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

These and other characteristics of the present disclosure will become apparent from the following description of preferred forms of embodiment, given as a non-limiting example, with reference to the attached drawings.

It should also be understood that, although the present disclosure has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of the disclosure, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

The above and other aspects, features and advantages of the present disclosure will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely examples of the disclosure that may be embodied in various forms. Well-known and/or repeated functions and structures have not been described in detail so as not to obscure the present disclosure with unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.

The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the disclosure.

The present disclosure is further described with reference to the following figures and specific examples.

Example 1

The first embodiment of the disclosure relates to the field of torque distribution of hybrid vehicles, in particular to a torque distribution method for a parallel hybrid vehicle.

The embodiment of the disclosure can utilize a state detection device of a vehicle and a battery energy management module of the vehicle to distribute the torque of the vehicle based on the running condition of the vehicle and the running condition of a power battery.

As shown in fig. 1, the torque distribution method of the vehicle includes the steps of:

and S101, determining the current working condition of the vehicle based on the current state parameter of the vehicle.

In this step, the current operating condition of the vehicle is determined based on the current state parameters of the vehicle. The working condition refers to the running condition of the vehicle in the running process, such as a driving working condition, a braking working condition, a cruising working condition and the like; the state parameters refer to the running parameters of the vehicle such as the depth of an accelerator pedal, the opening degree of an accelerator, the temperature of engine oil, the temperature of cooling water and the like in the running process.

In some embodiments, the current operating condition includes at least one of a hard acceleration condition, a normal driving condition, and a braking condition, wherein the hard acceleration condition or the normal driving condition is determined by at least an accelerator opening and a throttle opening change rate.

Specifically, for example, when the accelerator opening of the vehicle is greater than a first accelerator opening limit value, and at the same time, the accelerator change rate of the vehicle is greater than a first accelerator change rate limit value, the vehicle enters a rapid acceleration condition, where the first accelerator opening limit value and the first accelerator change rate limit value may be obtained by table lookup.

For another example, when the accelerator opening of the vehicle is greater than the second accelerator opening limit value, and simultaneously, the accelerator change rate of the vehicle is less than the second accelerator change rate limit value, the vehicle enters a normal running condition; the second throttle change rate limit value is smaller than the first throttle change rate limit value, and the second throttle opening degree limit value and the second throttle change rate limit value can be obtained through table lookup.

If the opening degree of the accelerator is zero, the vehicle enters a braking working condition; when the braking recovery power of the braking energy recovery system is higher than the overall requirements of the whole vehicle accessories and charging, the engine of the vehicle is stopped from being supplied with oil, and when the braking recovery power recovered by the braking energy recovery system is lower than the overall requirements of the whole vehicle accessories and charging, the engine of the vehicle is stopped.

And S102, acquiring the current SOC state of the power battery in the vehicle.

After the current operating condition of the vehicle is determined through the step S101, in this step, the current SOC state of the power battery in the vehicle is obtained. The SOC state refers to a state of charge of a power battery of the vehicle, that is, a ratio of a current capacity of the power battery to a total battery capacity is used, and a potential performance of the power battery of the vehicle can be estimated by using an SOC value, wherein the SOC value can be obtained by parameters such as a terminal voltage, a charging and discharging current, and an internal resistance of the power battery and is output by an energy management module of the vehicle.

Further, the SOC value of the hybrid vehicle directly affects the performance of the power battery of the vehicle, and in order to fully utilize the electric energy of the power battery and increase the recovery, an SOC threshold may be set according to the driving condition of the vehicle and the driving demand of the vehicle, and the state of the power battery of the vehicle may be determined based on the result of comparing the current SOC value of the power battery of the vehicle with the SOC threshold. The SOC threshold value at least comprises a first SOC threshold value, a second SOC threshold value, a third SOC threshold value, a fourth SOC threshold value and a fifth SOC threshold value which are increased in sequence.

Specifically, the first SOC threshold is a rapid acceleration threshold, and at this time, the vehicle is in a rapid acceleration operating condition, and the threshold is the lowest threshold, so as to fully release electric energy and meet the rapid acceleration requirement of the vehicle.

The second SOC threshold is a start charge threshold, and at this time, the engine of the vehicle is started to charge, and the threshold is low to fully utilize electric energy, and meanwhile, the driving demand of the vehicle is taken into consideration, and when the driving demand is not particularly severe, the battery of the vehicle is charged.

The third SOC threshold value is a driving assistance threshold value, at the moment, a driver operates an accelerator pedal more smoothly, and the vehicle is in a stable driving process. The third SOC threshold is higher to obtain efficient operation of the engine; when the power demand of the vehicle exceeds the driving capability which can be provided by the engine of the vehicle alone, the motor of the vehicle is controlled to carry out boosting.

The fourth SOC threshold is a driving charging threshold corresponding to an upper limit of normal driving charging, and the threshold is set in a higher interval so as to fully utilize the situation that the engine works in the higher interval and convert redundant energy into electric energy of a power battery of the vehicle.

And the fifth SOC threshold value is a recovery threshold value, at the moment, the vehicle is in a braking working condition, and the threshold value is set to be the highest value so as to fully recover energy in the braking process.

The first SOC threshold, the second SOC threshold, the third SOC threshold, the fourth SOC threshold and the fifth SOC threshold are sequentially increased, and specific numerical values of the first SOC threshold, the second SOC threshold, the third SOC threshold, the fourth SOC threshold and the fifth SOC threshold can be set according to driving habits of drivers.

And S103, distributing the torque between the engine and the driving motor based on the current working condition and the current SOC state.

After the current SOC state of the battery is obtained in step S102, in this step, torque is distributed between the engine and the drive motor based on the current operating condition and the current SOC state. The torque distribution is described below in terms of the current operating conditions of the vehicle and the SOC state of the battery.

Specifically, when the vehicle is in a driving state, when the accelerator opening is greater than a first accelerator opening limit value, and simultaneously, when the accelerator change rate of the vehicle is greater than a first accelerator change rate limit value, the vehicle enters a rapid acceleration working condition. At this time, if the SOC value is greater than a first SOC threshold value, the vehicle enters a rapid acceleration mode, the engine of the vehicle operates at a position corresponding to an external characteristic curve corresponding to a current rotation speed, that is, the engine is in a full-load operation state, and at this time, a torque demand shortage portion of the vehicle is provided by a motor of the vehicle.

When the accelerator opening is larger than a second accelerator opening limit value, and simultaneously the accelerator change rate of the vehicle is smaller than a second accelerator change rate limit value, the vehicle enters a normal running working condition; the torque of the vehicle is further distributed according to the determination of the energy management demand module.

Specifically, when the SOC value of the battery is smaller than the fourth SOC threshold value and the torque demand of the vehicle does not reach the external characteristic curve of the engine, at this time, the engine operates at the lower limit of the efficient operating area, the generator of the vehicle generates a negative torque, and the battery enters a driving charging state. When the SOC threshold of the battery is larger than the third SOC threshold and the torque demand of the vehicle is larger than the external characteristic torque of the engine, the engine is at the upper limit of the high-efficiency working area, and the torque of the vehicle is insufficient and is provided by the motor. When the SOC threshold value of the battery is larger than the fourth SOC threshold value, and the torque requirement of the vehicle does not reach the external characteristic of the engine, at the moment, the engine of the vehicle is controlled to be stopped, the motor of the vehicle provides the driving torque of the whole vehicle, and the vehicle enters a small-load discharge area.

The engine high-efficiency working area is an area surrounded by an engine optimal working line, wherein the engine optimal working line is a line formed by engine working points with highest engine efficiency at a certain engine speed. The engine efficient operating zone may be determined based on an engine efficiency MAP. Generally, the engine efficient operating region is shown in FIG. 2, and the left and right limits can be taken to be upper and lower limits of engine speed to fully utilize the engine speed capability. The upper limit of the high-efficiency working area of the engine can adopt a maximum torque curve to fully exert the maximum torque capacity of the engine, and the lower limit thereof can remove the working point with the engine efficiency as the lower limit efficiency value according to an engine efficiency MAP.

And when the opening degree of the accelerator is zero and the vehicle enters a braking working condition, distributing the torque of the vehicle according to a judgment result of the energy management demand module.

Specifically, when the SOC value of the battery is smaller than the second SOC threshold value, the engine of the vehicle is started to charge the power battery of the vehicle, and the motor performs negative torque quick forced charging. And when the SOC value of the battery is smaller than a fifth SOC threshold value and the recovered power of the vehicle is larger than the accessory power, the vehicle stops supplying oil to the engine to save fuel oil, and the motor of the vehicle generates negative torque to recover energy. The vehicle stops fueling to the engine but does not stop the engine to prevent frequent vehicle starts and stops caused by the driver accelerating again. At this time, if the driver steps on the accelerator suddenly, the engine can quickly resume fuel supply and switch to the sudden acceleration operating mode. And when the SOC value of the battery is smaller than a fifth SOC threshold value and the recovered power is smaller than the accessory power, the vehicle controls the engine to stop, and a motor of the vehicle generates negative torque to recover. And when the SOC value of the battery is larger than the fifth SOC threshold value, the vehicle stops supplying oil to the engine, meanwhile, the motor of the vehicle is prohibited from energy recovery, and accessories of the vehicle are controlled to actively discharge.

The power system of the hybrid electric vehicle comprises the assembly components such as the engine, the driving motor and the power battery pack, and is also provided with controllers corresponding to the assembly components, specifically an engine controller (EMS), a vehicle control unit (HCU), a Motor Controller (MCU), a Battery Management System (BMS), a Transmission Controller (TCU) and the like.

In this embodiment, the system control and judgment of the vehicle control unit (HCU) is relatively comprehensive, and the vehicle control unit (HCU) can acquire the opening degrees of the acceleration pedal and the brake pedal, acquire the running state signals of the motor and the engine, and comprehensively give out calculation and judgment, so that the vehicle control unit (HCU) is preferably adopted to coordinate and control the torque distribution of the vehicle power system. In other embodiments, the distribution of the torque of the power system may also be controlled by a Motor Controller (MCU), which is not limited herein.

The embodiment of the disclosure starts from two aspects of running working condition and battery energy management of a hybrid vehicle, and performs torque distribution on an engine and a motor under different working conditions, so that the requirement of a driver and the requirement of energy management are met, and the dual requirements of the dynamic property and the economical efficiency of the whole vehicle are met.

Example 2

To better implement the above method, a second aspect of the present disclosure also provides a torque distribution device for a hybrid vehicle, which may be integrated on an electronic device.

For example, as shown in fig. 3, the torque distribution device for a hybrid vehicle may include: the determining module 210, the obtaining module 220, and the allocating module 230 are specifically as follows:

(1) the determining module 210 is configured to determine a current operating condition of the vehicle based on a current state parameter of the vehicle.

Specifically, the operating condition refers to the operating condition of the vehicle during operation, wherein the operating condition at least comprises one of a rapid acceleration operating condition, a normal running operating condition and a braking operating condition. Further, the rapid acceleration condition or the normal running condition is determined at least by the accelerator opening and the throttle opening change rate. The state parameters refer to the running parameters of the vehicle such as the depth of an accelerator pedal, the opening degree of an accelerator, the temperature of engine oil, the temperature of cooling water and the like during running.

(2) The obtaining module 220 is configured to obtain a current SOC state of a power battery in the vehicle.

Specifically, the SOC state refers to a state of charge of a battery of the vehicle, that is, a potential performance of the battery can be estimated by using an SOC value according to a ratio of a current capacity of the battery to a total capacity of the battery, where the SOC value can be obtained by parameters such as a terminal voltage, a charge/discharge current, and an internal resistance of the battery.

(3) A distribution module 230 to distribute torque between the engine and the drive motors based on the current operating conditions and the current SOC state.

Example 3

It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor.

To this end, a third embodiment of the present disclosure provides a storage medium, which is a computer-readable medium storing a computer program that when executed by a processor implements the torque distribution method for a hybrid vehicle provided by the embodiments of the present disclosure, including the following steps S11 to S13:

s11, determining the current working condition of the vehicle based on the current state parameters of the vehicle;

s12, acquiring the current SOC state of a power battery in the vehicle;

s13, distributing torque between the engine and the driving motor based on the current working condition and the current SOC state.

Further, the computer program, when executed by a processor, implements the other methods provided by any of the above-mentioned embodiments of the present disclosure.

Example 4

A fourth embodiment of the present disclosure provides an electronic device, as shown in fig. 4, including at least a processor 401 and a memory 402, the memory 402 having a computer program stored thereon, the processor 401, when executing the computer program on the memory 402, implementing the torque distribution method for a hybrid vehicle provided by any of the embodiments of the present disclosure. Illustratively, the method performed by the electronic device computer program is as follows:

s21, determining the current working condition of the vehicle based on the current state parameter of the vehicle;

s22, acquiring the current SOC state of a power battery in the vehicle;

s23, distributing torque between the engine and the driving motor based on the current working condition and the current SOC state.

In a specific implementation, the determining module 210, the obtaining module 220, the allocating module 230, and the like are all stored in the memory 402 as program units, and the processor 401 executes the program units stored in the memory 402 to implement corresponding functions.

The storage medium may be included in the electronic device; or may exist separately without being assembled into the electronic device.

The storage medium carries one or more programs that, when executed by the electronic device, cause the electronic device to: acquiring at least two internet protocol addresses; sending a node evaluation request comprising at least two internet protocol addresses to node evaluation equipment, wherein the node evaluation equipment selects the internet protocol addresses from the at least two internet protocol addresses and returns the internet protocol addresses; receiving an internet protocol address returned by the node evaluation equipment; wherein the obtained internet protocol address indicates an edge node in the content distribution network.

Alternatively, the storage medium carries one or more programs that, when executed by the electronic device, cause the electronic device to: receiving a node evaluation request comprising at least two internet protocol addresses; selecting an internet protocol address from at least two internet protocol addresses; returning the selected internet protocol address; wherein the received internet protocol address indicates an edge node in the content distribution network.

Computer program code for carrying out operations for the present disclosure may be written in any combination of one or more programming languages, including but not limited to an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the passenger computer, partly on the passenger computer, as a stand-alone software package, partly on the passenger computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the passenger computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

It should be noted that the storage media described above in this disclosure can be computer readable signal media or computer readable storage media or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in the present disclosure, a computer readable signal medium may comprise a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any storage medium that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a storage medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The units described in the embodiments of the present disclosure may be implemented by software or hardware. Where the name of an element does not in some cases constitute a limitation on the element itself.

The functions described herein above may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), systems on a chip (SOCs), Complex Programmable Logic Devices (CPLDs), and the like.

In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other embodiments in which any combination of the features described above or their equivalents does not depart from the spirit of the disclosure. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.

Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

While the present disclosure has been described in detail with reference to the embodiments, the present disclosure is not limited to the specific embodiments, and those skilled in the art can make various modifications and alterations based on the concept of the present disclosure, and the modifications and alterations should fall within the scope of the present disclosure as claimed.

Claims

1. A torque distribution method for a parallel hybrid vehicle, characterized by comprising:

determining a current working condition of the vehicle based on a current state parameter of the vehicle;

acquiring the current SOC state of a power battery in the vehicle;

distributing torque between the engine and the driving motor based on the current working condition and the current SOC state.

2. The method of claim 1, wherein the current operating condition comprises at least one of a hard acceleration condition, a normal driving condition, and a braking condition.

3. The torque distribution method according to claim 2, wherein the hard acceleration condition or the normal running condition is determined at least by an accelerator opening and a throttle opening change rate.

4. The torque distribution method of claim 1, wherein distributing torque between an engine and an electric machine based on the current operating conditions and the current SOC state comprises:

and under the condition that the current working condition is determined, torque distribution is carried out based on a comparison result between the current SOC state and an SOC threshold value, wherein the SOC threshold value at least comprises a first SOC threshold value, a second SOC threshold value, a third SOC threshold value, a fourth SOC threshold value and a fifth SOC threshold value which are sequentially increased.

5. The method of claim 4, wherein when the current operating condition is a hard acceleration condition, torque distribution is performed based on a comparison of the current SOC state to a first SOC threshold.

6. The torque distribution method according to claim 4, wherein when the current operating condition is a normal driving condition, torque distribution is performed based on a comparison result of the current SOC state with a third SOC threshold value and a fourth SOC threshold value, respectively.

7. The method of claim 4, wherein when the current operating condition is a braking condition, torque distribution is performed based on a comparison of the current SOC state with a second SOC threshold and a fifth SOC threshold, respectively.

8. The torque distribution method of claim 7, wherein when the current SOC state is less than the fifth SOC threshold, torque distribution is based on a comparison of the recovered power and accessory power.

9. A torque distribution device for a parallel hybrid vehicle, comprising:

the determining module is used for determining the current working condition of the vehicle based on the current state parameter of the vehicle;

the acquisition module is used for acquiring the current SOC state of a power battery in the vehicle;

and the distribution module is used for distributing the torque between the engine and the driving motor based on the current working condition and the current SOC state.

10. A computer-readable storage medium storing a computer program for executing the torque distribution method according to any one of claims 1 to 8.