Vehicle engine reverse rotation prevention control method and system

Abstract

The invention provides a vehicle engine reverse rotation prevention control method and system.The method comprises the steps that when it is detected that a hybrid power system in a hybrid power vehicle is in a running state in real time, the first rotating speed of an engine in the hybrid power vehicle is monitored in real time; monitoring a second rotating speed of a generator in the hybrid vehicle in real time, and matching a first torque limit corresponding to the generator in real time according to the first rotating speed; matching a second torque limit corresponding to the generator in real time according to the second rotating speed, and performing minimization processing on the first torque limit and the second torque limit to generate a corresponding target torque limit in real time; and the target torque limit is correspondingly transmitted to a motor controller in the hybrid vehicle based on a preset rule, so that the motor controller completes corresponding torque control. The limiting torque of the engine and the generator can be accurately controlled, the reverse rotation phenomenon of the engine can be prevented, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a vehicle engine anti-reverse control method and system. Background Art

[0002] With the advancement of science and technology and the rapid development of productivity, cars have become popular in people's daily lives and have become one of the indispensable means of transportation for people's daily travel, greatly facilitating people's lives.

[0003] In existing new energy hybrid models, the engine is torque controlled in series mode and the generator is speed controlled. The engine speed is guaranteed by the generator, and the engine speed is maintained at a stable speed through the speed control of the generator. The generator's own control is used to ensure that the engine speed does not reverse. However, the generator's own speed control may be abnormal. When the generator speed control logic is abnormal, the engine is prone to stalling or even reverse. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a vehicle engine anti-reverse control method and system to solve the problem that when the vehicle mode is in series mode, the engine torque is controlled, the generator speed is controlled, and when the generator speed control logic is abnormal, the engine may be stalled or even reversed.

[0005] The first aspect of the embodiment of the present invention proposes:

[0006] A vehicle engine anti-reverse control method, wherein the method comprises:

[0007] When it is detected in real time that the hybrid system in the hybrid vehicle is in a running state, a first speed of the engine in the hybrid vehicle is monitored in real time;

[0008] monitoring a second rotation speed of a generator in the hybrid vehicle in real time, and matching a first torque limit corresponding to the generator according to the first rotation speed in real time;

[0009] matching a second torque limit corresponding to the generator in real time according to the second speed, and performing a smaller processing on the first torque limit and the second torque limit to generate a corresponding target torque limit in real time;

[0010] The target torque limit is calculated by a vehicle controller based on a preset rule and transmitted to a motor controller inside the hybrid vehicle, so that the motor controller completes the corresponding torque control.

[0011] The beneficial effects of the present invention are:

[0012] Key point 1: By monitoring the engine speed and the generator speed, the generator torque can be limited to prevent the engine from reversing;

[0013] Key point 2: The generator torque limit distinguishes between positive torque capacity and negative torque capacity. As the engine speed decreases, the negative torque capacity of the generator decreases as the engine speed decreases. When the engine speed is less than a certain value, the negative torque capacity of the engine is 0.

[0014] Furthermore, the method further comprises:

[0015] The higher the speed of the engine, the more gradually the corresponding negative limiting torque of the generator is released.

[0016] The method further comprises:

[0017] When the second speed is acquired in real time, the generator request torque is limited by looking up the generator speed table to generate the second torque limit accordingly.

[0018] Furthermore, the target torque limit is converted into a corresponding target message, and the target message is correspondingly transmitted to the motor controller via a CAN network.

[0019] The second aspect of the embodiment of the present invention proposes:

[0020] A vehicle engine anti-reverse control system, wherein the system comprises:

[0021] a detection module, configured to monitor in real time a first rotation speed of an engine in the hybrid vehicle when detecting in real time that a hybrid system in the hybrid vehicle is in an operating state;

[0022] a first processing module, configured to monitor in real time a second speed of a generator inside the hybrid vehicle, and to match in real time a first torque limit corresponding to the generator according to the first speed;

[0023] A second processing module is used to match a second torque limit corresponding to the generator according to the second speed in real time, and to perform a smaller processing between the first torque limit and the second torque limit to generate a corresponding target torque limit in real time;

[0024] The third processing module is used to transmit the target torque limit to the motor controller inside the hybrid vehicle based on a preset rule, so that the motor controller completes the corresponding torque control.

[0025] Furthermore, the method further comprises:

[0026] The higher the speed of the engine, the corresponding limiting torque is gradually released.

[0027] Furthermore, the method further comprises:

[0028] When the second speed is acquired in real time, the generator request torque is limited by looking up the generator speed table to generate the second torque limit accordingly.

[0029] Furthermore, the target torque limit is converted into a corresponding target message, and the target message is correspondingly transmitted to the motor controller via a CAN network.

[0030] The third aspect of the embodiment of the present invention proposes:

[0031] A computer comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the vehicle engine anti-reverse control method as described above is implemented when the processor executes the computer program.

[0032] The fourth aspect of the embodiments of the present invention proposes:

[0033] A readable storage medium stores a computer program, wherein when the program is executed by a processor, the vehicle engine anti-reverse control method as described above is implemented.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A flow chart of a vehicle engine anti-reverse control method provided by a first embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the hardware structure of a hybrid system in a vehicle engine anti-reverse control method provided in a second embodiment of the present invention;

[0037] Figure 3 A schematic diagram of software control timing in a vehicle engine anti-reverse control method provided by a second embodiment of the present invention;

[0038] Figure 4 This is a structural block diagram of a vehicle engine anti-reverse control system provided in the third embodiment of the present invention.

[0039] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] See also Figure 1 , shown is a vehicle engine anti-reverse control method provided by the first embodiment of the present invention. The vehicle engine anti-reverse control method provided by this embodiment can accurately and effectively control the limiting torque of the engine and the generator, thereby preventing the engine from reversing, which correspondingly improves the user experience.

[0044] Specifically, this embodiment provides:

[0045] A vehicle engine anti-reverse control method specifically comprises the following steps:

[0046] Step S10, when it is detected in real time that the hybrid system in the hybrid vehicle is in a running state, monitoring in real time a first speed of the engine in the hybrid vehicle;

[0047] Step S20, monitoring a second rotation speed of a generator inside the hybrid vehicle in real time, and matching a first torque limit corresponding to the generator according to the first rotation speed in real time;

[0048] Step S30, matching a second torque limit corresponding to the generator according to the second speed in real time, and performing a smaller processing of the first torque limit and the second torque limit to generate a corresponding target torque limit in real time;

[0049] Step S40 : transmitting the target torque limit to a motor controller inside the hybrid vehicle based on a preset rule, so that the motor controller completes the corresponding torque control.

[0050] Second embodiment

[0051] Overall idea

[0052] This solution mainly limits the motor torque through the hybrid controller software control algorithm, thereby protecting the engine from being dragged in reverse.

[0053] Software Control Strategy

[0054] 1. Monitor the engine speed and limit the generator request torque by looking up the engine speed table. The calibration principle is: as the engine speed increases, the limit torque is gradually released;

[0055] 2. Monitor the generator speed and limit the generator request torque by looking up the generator speed table. The calibration principle is: as the generator speed increases, the limit torque is gradually released;

[0056] 3. Take the smaller of the torque limits calculated in step 1 and step 2;

[0057] 4. The hybrid controller sends the torque limit calculated in step 3 to the motor controller via the Can network in the form of a message.

[0058] In addition, this embodiment also provides software basic calibration parameters, which are as follows:

[0059]

[0060]

[0061] See also Figure 4 , the third embodiment of the present invention provides:

[0062] A vehicle engine anti-reverse control system, wherein the system comprises:

[0063] a detection module, configured to monitor in real time a first rotation speed of an engine in the hybrid vehicle when detecting in real time that a hybrid system in the hybrid vehicle is in an operating state;

[0064] a first processing module, configured to monitor in real time a second speed of the generator in the hybrid vehicle, and to match in real time a first torque limit corresponding to the engine according to the first speed;

[0065] A second processing module is used to match a second torque limit corresponding to the generator according to the second speed in real time, and to perform a smaller processing between the first torque limit and the second torque limit to generate a corresponding target torque limit in real time;

[0066] The third processing module is used to transmit the target torque limit to the motor controller inside the hybrid vehicle based on a preset rule, so that the motor controller completes the corresponding torque control.

[0067] A fourth embodiment of the present invention provides a computer, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the vehicle engine anti-reverse control method as described above when executing the computer program.

[0068] A fifth embodiment of the present invention provides a readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the vehicle engine anti-reverse rotation control method as described above is implemented.

[0069] In summary, the vehicle engine anti-reverse control method and system provided by the above embodiments of the present invention can accurately control the torque limit of the engine and the generator, thereby preventing the engine from reversing, thereby correspondingly improving the user experience.

[0070] It should be noted that the above modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0071] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0072] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0073] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A vehicle engine anti-reverse control method, characterized in that: The method comprises: When it is detected in real time that the hybrid system in the hybrid vehicle is in a running state, a first speed of the engine in the hybrid vehicle is monitored in real time; monitoring a second rotation speed of a generator in the hybrid vehicle in real time, and matching a first torque limit corresponding to the generator according to the first rotation speed in real time; matching a second torque limit corresponding to the generator in real time according to the second speed, and performing a smaller processing of the first torque limit and the second torque limit to generate a corresponding target torque limit in real time; The target torque limit is correspondingly transmitted to a motor controller inside the hybrid vehicle based on a preset rule, so that the motor controller completes corresponding torque control.

2. The vehicle engine anti-reverse control method according to claim 1, characterized in that: The method further comprises: When the first speed is acquired in real time, the generator request torque is limited by looking up the engine speed table to generate the first torque limit accordingly.

3. The vehicle engine anti-reverse control method according to claim 2, characterized in that: The method further comprises: The higher the speed of the engine, the corresponding limiting torque is gradually released.

4. The vehicle engine anti-reverse control method according to claim 3, characterized in that: The method further comprises: When the second speed is acquired in real time, the generator request torque is limited by looking up the generator speed table to generate the second torque limit accordingly.

5. The vehicle engine anti-reverse control method according to claim 1, characterized in that: The target torque limit is converted into a corresponding target message, and the target message is correspondingly transmitted to the motor controller via a CAN network.

6. A vehicle engine anti-reverse control system, characterized in that: The system comprises: a detection module, configured to monitor in real time a first rotation speed of an engine in the hybrid vehicle when detecting in real time that a hybrid system in the hybrid vehicle is in an operating state; a first processing module, configured to monitor in real time a second speed of a generator inside the hybrid vehicle, and to match in real time a first torque limit corresponding to the generator according to the first speed; A second processing module is used to match a second torque limit corresponding to the generator according to the second speed in real time, and to perform smaller processing between the first torque limit and the second torque limit to generate a corresponding target torque limit in real time; The third processing module is used to transmit the target torque limit to the motor controller inside the hybrid vehicle based on a preset rule, so that the motor controller completes the corresponding torque control.

7. A computer comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the vehicle engine anti-reverse control method according to any one of claims 1 to 7 is implemented.

8. A readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the vehicle engine anti-reverse control method according to any one of claims 1 to 7 is implemented.

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