Method and system for improving starting dynamics of hybrid vehicle drive system

Abstract

This application discloses a method and system for improving the starting power performance of a hybrid vehicle drive system. The method includes the following steps: acquiring the vehicle's starting driving conditions; acquiring the rate of change of the vehicle's starting torque demand within a preset time period; comparing the rate of change of the vehicle's starting torque demand with a limit value to obtain a first comparison condition; and controlling the torque output of the hybrid vehicle drive system according to the acquired first comparison condition to achieve different starting power performance. The control method for the starting power performance of a hybrid vehicle drive system provided by this application is simple to implement and effectively increases the starting power performance of the vehicle without increasing mechanical design costs, thereby improving the vehicle's starting ability and obstacle-crossing capabilities, such as hill climbing and overcoming bumps.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid vehicle starting power performance, and specifically to a method and system for improving the starting power performance of a hybrid vehicle drive system. Background Art

[0002] The common structure of hybrid vehicle power system is composed of engine, clutch, drive motor and generator. The power output of the vehicle is provided by the drive motor during the starting phase, and its torque output capacity is limited by the maximum available torque limit of the drive motor. When the vehicle needs a large torque output to start or improve the vehicle's starting and obstacle crossing capabilities such as climbing and crossing bumps, this power output control method cannot meet driving needs. Summary of the invention

[0003] The purpose of this application is to overcome the deficiencies of the above-mentioned background technology and to provide a method and system for improving the starting power of a hybrid vehicle drive system.

[0004] In a first aspect, a method for improving the starting dynamics of a hybrid vehicle drive system is provided, comprising the following steps:

[0005] Obtaining the starting driving condition of the vehicle;

[0006] Obtain the change rate of the vehicle starting demand torque within a preset time;

[0007] Compare the vehicle starting demand torque change rate with the vehicle starting demand torque change rate limit to obtain a first comparison working condition;

[0008] According to the obtained first comparison working condition, different control strategies for the torque output of the hybrid vehicle drive system starting power are controlled and executed.

[0009] According to the first aspect, in a first implementation of the first aspect, according to the acquired first comparison working condition, controlling and executing different control strategy steps for torque output of starting dynamics of a hybrid vehicle drive system specifically includes the following steps:

[0010] When the rate of change of the vehicle starting required torque is not greater than the rate of change of the vehicle starting required torque, a second comparison condition of the vehicle starting required torque and the maximum available torque of the drive motor is obtained;

[0011] According to the obtained second comparison working condition, control and execute different control strategies for torque output of the hybrid vehicle drive system starting dynamics;

[0012] When the rate of change of the vehicle starting torque requirement is greater than the rate of change of the vehicle starting torque requirement limit, a third comparison condition of the vehicle speed and the engine starting speed is obtained;

[0013] According to the obtained third comparison working condition, different control strategies for the torque output of the hybrid vehicle drive system for starting dynamics are controlled and executed.

[0014] According to the first implementation of the first aspect, in the second implementation of the first aspect, the step of controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the acquired second comparison working condition specifically includes the following steps:

[0015] When the starting torque required for the vehicle is not greater than the maximum available torque of the drive motor, the drive motor is controlled to output the starting torque required for the vehicle;

[0016] When the starting torque required for the vehicle is greater than the maximum available torque of the drive motor, a third comparison condition of the vehicle speed and the engine starting speed is obtained;

[0017] According to the obtained third comparison working condition, different control strategies for the torque output of the hybrid vehicle drive system for starting dynamics are controlled and executed.

[0018] According to the second implementation of the first aspect, in the third implementation of the first aspect, the step of controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the acquired third comparison working condition specifically includes the following steps:

[0019] When the vehicle speed is not greater than the engine starting speed, the drive motor and generator are controlled to output the vehicle starting required torque;

[0020] When the vehicle speed is greater than the engine starting speed, the drive motor, generator and engine are controlled to output the vehicle starting required torque.

[0021] According to the third implementation of the first aspect, in the fourth implementation of the first aspect, after the step of controlling the drive motor, the generator and the engine to output the vehicle starting required torque when the vehicle speed is greater than the engine starting speed, the following steps are also included:

[0022] Obtain the duration of the drive motor, generator and engine outputting the required torque for vehicle starting;

[0023] Obtaining a fourth comparison condition of duration and duration limit;

[0024] According to the fourth comparison operating condition obtained, different control strategies for the torque output of the hybrid vehicle drive system for starting power are controlled and executed.

[0025] According to the fourth implementation of the first aspect, in the fifth implementation of the first aspect, the step of controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the acquired fourth comparison operating condition specifically includes the following steps:

[0026] When the duration of outputting the vehicle starting required torque through the driving motor, the generator and the engine is greater than the duration limit, the engine is controlled to output the vehicle starting required torque.

[0027] According to the first aspect, in a sixth implementation of the first aspect, the step of obtaining the vehicle starting demand torque change rate within a preset time specifically includes the following steps:

[0028] Periodically obtain the change rate of the vehicle starting demand torque within a preset time;

[0029] The change rate of the whole vehicle starting demand torque within a preset time is obtained periodically, and the average value of the change rate of the whole vehicle starting demand torque is obtained.

[0030] In a second aspect, the present application provides a system for improving the starting power of a hybrid vehicle drive system, and a starting driving condition acquisition module, which is used to acquire the starting driving condition of the vehicle;

[0031] A torque change rate acquisition module, which is in communication with the starting driving condition acquisition module and is used to acquire the starting torque change rate of the vehicle within a preset time;

[0032] A first comparison operating condition acquisition module is communicatively connected to the torque change rate acquisition module and is used to compare the vehicle starting demand torque change rate with the vehicle starting demand torque change rate limit to acquire a first comparison operating condition;

[0033] The control module is used to control and execute different control strategies for torque output of the hybrid vehicle drive system starting power according to the acquired first comparison working condition.

[0034] According to the second aspect, in a first implementation manner of the second aspect, the control module includes:

[0035] A second comparison operating condition acquisition submodule is communicatively connected to the first comparison operating condition acquisition module, and is used to acquire a second comparison operating condition of the vehicle starting demand torque and the maximum available torque of the drive motor when the vehicle starting demand torque change rate is not greater than the vehicle starting demand torque change rate limit;

[0036] A second control submodule is communicatively connected with the second comparison operating condition acquisition submodule, and is used to control and execute different control strategies for the torque output of the hybrid vehicle drive system starting dynamics according to the acquired second comparison operating condition;

[0037] A third comparison operating condition acquisition submodule is communicatively connected to the first comparison operating condition acquisition submodule, and is used to acquire a third comparison operating condition of the vehicle speed and the engine starting speed when the vehicle starting required torque change rate is greater than the vehicle starting required torque change rate limit;

[0038] The third control submodule is communicatively connected with the third comparison operating condition acquisition submodule, and is used for controlling and executing different control strategies for the torque output of the hybrid vehicle drive system starting power according to the acquired third comparison operating condition.

[0039] According to the first implementation of the second aspect, in the second implementation of the second aspect, the third control submodule includes:

[0040] A third control unit is communicatively connected with the third comparison working condition acquisition submodule, and controls the drive motor and the generator to output the starting torque required for the vehicle when the vehicle speed is not greater than the engine starting speed;

[0041] The fourth control unit is communicatively connected with the third comparison working condition acquisition submodule, and when the vehicle speed is greater than the engine starting speed, controls the drive motor, the generator and the engine to output the vehicle starting required torque.

[0042] Compared with the prior art, the advantages of this application are as follows:

[0043] The control method for the starting power of a hybrid vehicle drive system provided in the present application is simple to implement and can effectively increase the starting power performance of the entire vehicle without increasing the mechanical design cost, thereby improving the vehicle's starting and obstacle-crossing capabilities such as climbing slopes and crossing bumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A method flow chart of a method for controlling the starting dynamics of a hybrid vehicle drive system provided in the present application;

[0045] Figure 2 Another method flow chart of the method for controlling the starting dynamics of a hybrid vehicle drive system provided in the present application;

[0046] Figure 3 A functional module block diagram of a control system for the starting dynamics of a hybrid vehicle drive system provided in this application;

[0047] Figure 4 This is another functional module block diagram of the control system for the starting dynamics of the hybrid vehicle drive system provided in this application. DETAILED DESCRIPTION

[0048] The specific embodiments of the present application will now be described in detail, examples of which are illustrated in the accompanying drawings. Although the present application will be described in conjunction with the specific embodiments, it will be understood that it is not intended to limit the present application to the described embodiments. On the contrary, it is intended to cover the changes, modifications and equivalents included in the spirit and scope of the present application as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of the two.

[0049] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] Note: The example to be introduced below is only a specific example, and is not intended to limit the embodiments of the present application to the following specific steps, values, conditions, data, sequences, etc. Those skilled in the art can apply the concept of the present application to construct more embodiments not mentioned in the present description by reading the present description.

[0051] The torque output capacity of existing hybrid vehicle power systems is limited by the maximum available torque of the drive motor. When the vehicle starts to output large torque or overcome obstacles, the conventional power output method cannot meet the technical problems of driving needs.

[0052] In view of this, see Figure 1 As shown, the embodiment of the present application provides a method for improving the starting power of a hybrid vehicle drive system, comprising the following steps:

[0053] Step S100, obtaining the starting driving condition of the vehicle;

[0054] Step S200, obtaining the rate of change of the vehicle starting demand torque within a preset time;

[0055] Step S300, comparing the vehicle starting demand torque change rate with the vehicle starting demand torque change rate limit, obtaining a first comparison condition, and obtaining a vehicle starting demand torque change speed condition according to the first comparison condition, so as to achieve output control of the starting power under the vehicle starting demand large output torque condition and obstacle crossing condition;

[0056] Step S400: According to the acquired first comparison condition, control execution of different torque output control strategies for starting power of the hybrid vehicle drive system.

[0057] The method for controlling the starting dynamics of a hybrid vehicle drive system provided in the present application obtains the starting operating condition of the vehicle by obtaining the starting torque change rate of the whole vehicle, and provides different starting dynamics torque output control strategies for different comparison conditions between the starting torque change rate of the whole vehicle and the starting torque change rate limit of the whole vehicle.

[0058] The preset time is a relatively short time, more specifically, 1 minute, 3 minutes, 5 minutes, 10 minutes or 15 minutes, so as to obtain the starting condition of the vehicle at the starting stage according to the change rate of the vehicle starting demand torque within the time range.

[0059] In one embodiment, the step S400, based on the acquired first comparison condition, controls the execution of different control strategies for the torque output of the hybrid vehicle drive system starting dynamics, specifically includes the following steps:

[0060] Step S411: when the rate of change of the vehicle starting torque requirement is not greater than the rate of change of the vehicle starting torque requirement, obtaining a second comparison condition of the vehicle starting torque requirement and the maximum available torque of the drive motor;

[0061] Step S412: Control and execute different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the acquired second comparison working condition;

[0062] Step S421: when the rate of change of the vehicle starting torque requirement is greater than the rate of change of the vehicle starting torque requirement limit, obtaining a third comparison condition of the vehicle speed and the engine starting speed;

[0063] Step S422: According to the acquired third comparison condition, control execution of different torque output control strategies for starting power of the hybrid vehicle drive system.

[0064] The method for controlling the starting dynamics of a hybrid vehicle drive system provided in the present application further obtains a comparison condition between the starting torque requirement of the whole vehicle and the maximum available torque of the drive motor under conditions where the rate of change of the starting torque requirement of the whole vehicle is low, and provides different control strategies for the torque output of the starting dynamics of the hybrid vehicle drive system accordingly. For conditions where the rate of change of the starting torque requirement of the whole vehicle is high, the method further obtains a comparison condition between the vehicle speed and the engine starting speed, and provides different control strategies for the torque output of the starting dynamics of the hybrid vehicle drive system accordingly.

[0065] In one embodiment, the step S412, based on the acquired second comparison condition, controls the execution of different control strategies for the torque output of the hybrid vehicle drive system starting dynamics, specifically includes the following steps:

[0066] Step S4121: When the starting torque required for the vehicle is not greater than the maximum available torque of the drive motor, control the drive motor to output the starting torque required for the vehicle;

[0067] Step S41221: when the starting torque required for the vehicle is greater than the maximum available torque of the drive motor, a third comparison condition of the vehicle speed and the engine starting speed is obtained;

[0068] Step S41222: According to the acquired third comparison condition, control execution of different torque output control strategies for starting power of the hybrid vehicle drive system.

[0069] The present application provides a method for controlling the starting dynamics of a hybrid vehicle drive system. When the whole vehicle is starting with a large starting output torque or is in an obstacle crossing condition, and the starting torque required for the whole vehicle does not exceed the maximum available torque of the drive motor, the starting torque required for the whole vehicle can be output only by the drive motor; when the whole vehicle is starting with a large starting output torque or is in an obstacle crossing condition, and the starting torque required for the whole vehicle exceeds the maximum available torque of the drive motor, different starting dynamics torque output control strategies are further provided based on the comparison condition between the whole vehicle speed and the engine starting speed.

[0070] In one embodiment, the step S41222, based on the acquired third comparison condition, controls the execution of different control strategies for the torque output of the hybrid vehicle drive system starting dynamics, specifically includes the following steps:

[0071] When the vehicle speed is not greater than the engine starting speed, the drive motor and generator are controlled to output the vehicle starting required torque;

[0072] When the vehicle speed is greater than the engine starting speed, the drive motor, generator and engine are controlled to output the vehicle starting required torque.

[0073] The present application provides a method for controlling the starting power of a hybrid vehicle drive system. When the whole vehicle is starting with a large starting output torque or is in an obstacle crossing condition, and the starting torque required for the whole vehicle exceeds the maximum available torque of the drive motor, and the vehicle speed does not exceed the engine starting speed, the clutch is forced to engage to control the drive motor and the generator to output the starting torque required for the whole vehicle to meet the starting power of the vehicle; when the whole vehicle is starting with a large starting output torque or is in an obstacle crossing condition, and the starting torque required for the whole vehicle exceeds the maximum available torque of the drive motor, and the vehicle speed exceeds the engine starting speed, the clutch is forced to engage to control the drive motor, the generator and the engine to output the starting torque required for the whole vehicle to meet the starting power of the vehicle.

[0074] In one embodiment, after the step of controlling the drive motor, the generator and the engine to output the vehicle starting required torque when the vehicle speed is greater than the engine starting speed, the following steps are also included:

[0075] Obtain the duration of the drive motor, generator and engine outputting the required torque for vehicle starting;

[0076] Obtaining a fourth comparison condition of duration and duration limit;

[0077] According to the fourth comparison operating condition obtained, different control strategies for the torque output of the hybrid vehicle drive system for starting power are controlled and executed.

[0078] The present application provides a method for controlling the starting dynamics of a hybrid vehicle drive system. When the whole vehicle is starting with a large starting output torque or in an obstacle crossing condition, and the starting torque required for the whole vehicle exceeds the maximum available torque of the drive motor, and the vehicle speed exceeds the engine starting speed, the clutch is forced to engage to control the output control of the drive motor, the generator and the engine to output the starting torque required for the whole vehicle for more than a certain period of time. Then, according to the duration of the output control, different starting dynamics torque output control strategies are controlled to be executed to meet the starting dynamics torque output control strategy under the conditions that the whole vehicle is starting with a large starting output torque or in an obstacle crossing condition, and the starting torque required for the whole vehicle exceeds the maximum available torque of the drive motor, and the vehicle speed exceeds the engine starting speed, as well as the duration of the output control.

[0079] In one embodiment, the step of controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the fourth comparison working condition obtained specifically includes the following steps:

[0080] When the duration of outputting the vehicle starting required torque through the driving motor, the generator and the engine is greater than the duration limit, the engine is controlled to output the vehicle starting required torque.

[0081] The present application provides a method for controlling the starting power of a hybrid vehicle drive system. When the whole vehicle is starting with a large starting output torque or is in an obstacle crossing condition, and the starting torque required for the whole vehicle exceeds the maximum available torque of the drive motor, and the vehicle speed exceeds the engine starting speed, the clutch is forced to engage to control the output of the driving motor, generator and engine to output the vehicle starting torque required. After the output control exceeds a certain time, the engine output is used to control the vehicle starting output torque, so as to avoid the problem of vehicle power feeding and continuous consumption caused by long-term operation of the drive motor and generator.

[0082] In one embodiment, the step of obtaining the rate of change of the vehicle starting demand torque within a preset time specifically includes the following steps:

[0083] Periodically obtain the change rate of the vehicle starting demand torque within a preset time;

[0084] The change rate of the whole vehicle starting demand torque within a preset time is obtained periodically, and the average value of the change rate of the whole vehicle starting demand torque is obtained.

[0085] Based on the same inventive concept, the system for improving the starting dynamics of a hybrid vehicle drive system provided in the present application includes a starting driving condition acquisition module 100, a torque change rate acquisition module 200, a first comparison condition acquisition module 300 and a control module 400. The starting driving condition acquisition module 100 is used to acquire the starting driving condition of the vehicle; the torque change rate acquisition module 200 is communicated with the starting driving condition acquisition module 100 to acquire the starting torque change rate of the whole vehicle within a preset time; the first comparison condition acquisition module 300 is communicated with the torque change rate acquisition module 200 to compare the starting torque change rate of the whole vehicle and the starting torque change rate limit of the whole vehicle to acquire a first comparison condition; the control module 400 is communicated with the first comparison condition acquisition module 300 to control and execute different control strategies for the torque output of the starting dynamics of the hybrid vehicle drive system according to the acquired first comparison condition.

[0086] In one embodiment, the control module 400 includes a second comparison working condition acquisition submodule 411, a second control submodule 412, a third comparison working condition acquisition submodule 421 and a third control submodule 422. The second comparison working condition acquisition submodule 411 is communicated with the first comparison working condition acquisition module 300 to obtain the second comparison working condition of the vehicle starting demand torque and the maximum available torque of the drive motor when the vehicle starting demand torque change rate is not greater than the vehicle starting demand torque change rate limit; the second control submodule 412 is communicated with the second comparison working condition acquisition submodule 411 to obtain the second comparison working condition of the vehicle starting demand torque and the maximum available torque of the drive motor according to the obtained The second comparison condition controls the execution of different control strategies for the torque output of the starting dynamics of the hybrid vehicle drive system; the third comparison condition acquisition submodule 421 is communicated with the first comparison condition acquisition submodule 300, and is used to obtain the third comparison condition of the vehicle speed and the engine starting speed when the vehicle starting demand torque change rate is greater than the vehicle starting demand torque change rate limit; the third control submodule 422 is communicated with the third comparison condition acquisition submodule 421, and is used to control the execution of different control strategies for the torque output of the starting dynamics of the hybrid vehicle drive system according to the acquired third comparison condition.

[0087] In one embodiment, the third control submodule includes a third control unit and a fourth control unit. The third control unit is communicatively connected to the third comparison operating condition acquisition submodule. When the vehicle speed is not greater than the engine starting speed, the drive motor and the generator are controlled to output the vehicle starting required torque. The fourth control unit is communicatively connected to the third comparison operating condition acquisition submodule. When the vehicle speed is greater than the engine starting speed, the drive motor, the generator and the engine are controlled to output the vehicle starting required torque.

[0088] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0089] The present application implements all or part of the processes in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of each of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0090] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0091] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of a computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0092] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0093] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, servers or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0094] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), servers, and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0095] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0096] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0097] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for improving the starting power of a hybrid vehicle drive system, characterized in that: The steps include: Obtaining the starting driving condition of the vehicle; Obtain the change rate of the vehicle starting demand torque within a preset time; Compare the vehicle starting demand torque change rate with the vehicle starting demand torque change rate limit to obtain a first comparison working condition; According to the first comparison working condition obtained, controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics; The step of controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the first comparison working condition obtained specifically includes the following steps: When the rate of change of the vehicle starting required torque is not greater than the rate of change of the vehicle starting required torque, a second comparison condition of the vehicle starting required torque and the maximum available torque of the drive motor is obtained; According to the obtained second comparison working condition, control and execute different control strategies for torque output of the hybrid vehicle drive system starting dynamics; When the rate of change of the vehicle starting torque requirement is greater than the rate of change of the vehicle starting torque requirement limit, a third comparison condition of the vehicle speed and the engine starting speed is obtained; According to the obtained third comparison working condition, control and execute different control strategies of torque output of the hybrid vehicle drive system starting dynamics; The step of controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the acquired second comparison working condition specifically includes the following steps: When the starting torque required for the vehicle is not greater than the maximum available torque of the drive motor, the drive motor is controlled to output the starting torque required for the vehicle; When the starting torque required for the vehicle is greater than the maximum available torque of the drive motor, a third comparison condition of the vehicle speed and the engine starting speed is obtained; According to the obtained third comparison working condition, control and execute different control strategies of torque output of the hybrid vehicle drive system starting dynamics; The step of controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the obtained third comparison working condition specifically includes the following steps: When the vehicle speed is not greater than the engine starting speed, the drive motor and generator are controlled to output the vehicle starting required torque; When the vehicle speed is greater than the engine starting speed, the drive motor, generator and engine are controlled to output the vehicle starting torque required; After the step of controlling the drive motor, the generator and the engine to output the required torque for starting the vehicle when the vehicle speed is greater than the engine starting speed, the following steps are also included: Obtain the duration of the drive motor, generator and engine outputting the required torque for vehicle starting; Obtaining a fourth comparison condition of duration and duration limit; According to the fourth comparison working condition obtained, different control strategies for the torque output of the hybrid vehicle drive system starting power are controlled and executed; the step of controlling the execution of different control strategies for the torque output of the hybrid vehicle drive system starting power according to the fourth comparison working condition obtained specifically includes the following steps: When the duration of outputting the vehicle starting required torque through the driving motor, the generator and the engine is greater than the duration limit, the engine is controlled to output the vehicle starting required torque.

2. The method for improving the starting dynamics of a hybrid vehicle drive system according to claim 1, characterized in that: The step of obtaining the vehicle starting demand torque change rate within a preset time specifically includes the following steps: Periodically obtain the change rate of the vehicle starting demand torque within a preset time; The change rate of the whole vehicle starting demand torque within a preset time is obtained periodically, and the average value of the change rate of the whole vehicle starting demand torque is obtained.

3. A system for improving the starting power of a hybrid vehicle drive system, characterized in that: include: A starting driving condition acquisition module, used to acquire the starting driving condition of the vehicle; A torque change rate acquisition module, which is in communication with the starting driving condition acquisition module and is used to acquire the starting torque change rate of the vehicle within a preset time; A first comparison operating condition acquisition module is communicatively connected to the torque change rate acquisition module and is used to compare the vehicle starting demand torque change rate with the vehicle starting demand torque change rate limit to acquire a first comparison operating condition; A control module, configured to control and execute different control strategies for torque output of starting power of a hybrid vehicle drive system according to the acquired first comparison working condition; The control module comprises: A second comparison operating condition acquisition submodule is communicatively connected to the first comparison operating condition acquisition module, and is used to acquire a second comparison operating condition of the vehicle starting demand torque and the maximum available torque of the drive motor when the vehicle starting demand torque change rate is not greater than the vehicle starting demand torque change rate limit; A second control submodule is communicatively connected with the second comparison operating condition acquisition submodule, and is used to control and execute different control strategies for the torque output of the hybrid vehicle drive system starting dynamics according to the acquired second comparison operating condition; A third comparison operating condition acquisition submodule is communicatively connected to the first comparison operating condition acquisition submodule, and is used to acquire a third comparison operating condition of the vehicle speed and the engine starting speed when the vehicle starting required torque change rate is greater than the vehicle starting required torque change rate limit; A third control submodule is communicatively connected with the third comparison operating condition acquisition submodule, and is used to control and execute different control strategies for torque output of the hybrid vehicle drive system starting power according to the acquired third comparison operating condition; The third control submodule comprises: A third control unit is communicatively connected with the third comparison working condition acquisition submodule, and controls the drive motor and the generator to output the starting torque required for the vehicle when the vehicle speed is not greater than the engine starting speed; a fourth control unit, which is in communication connection with the third comparison working condition acquisition submodule, and controls the drive motor, the generator and the engine to output the starting torque required for the vehicle when the vehicle speed is greater than the engine starting speed; After the step of controlling the drive motor, the generator and the engine to output the required torque for starting the vehicle when the vehicle speed is greater than the engine starting speed, the following steps are also included: Obtain the duration of the drive motor, generator and engine outputting the required torque for vehicle starting; Obtaining a fourth comparison condition of duration and duration limit; According to the fourth comparison working condition obtained, controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics; The step of controlling and executing different control strategies for torque output of the hybrid vehicle drive system starting dynamics according to the fourth comparison working condition obtained specifically includes the following steps: When the duration of outputting the vehicle starting required torque through the driving motor, the generator and the engine is greater than the duration limit, the engine is controlled to output the vehicle starting required torque.

Images