Vehicle drivability debugging method and system

Abstract

The invention provides a vehicle drivability debugging method and system, and the method comprises the steps: controlling a hybrid system in a vehicle to correspondingly enter a parallel working condition when the vehicle is detected to be in a normal driving state in real time; when it is detected that the driving power of a driving motor in the vehicle is smaller than a preset power threshold value in real time, a parallel single power source mode of the hybrid power system is activated; acquiring running parameters correspondingly generated by the vehicle in the parallel single power source mode in real time, and analyzing the running state of the vehicle in real time according to the running parameters; and calibrating a clutch, a gearbox and an engine in the vehicle according to a data analysis result, and testing the driving performance of the vehicle according to the performance of a driving wheel end of the engine in real time. Multi-power-source cooperative control of the whole vehicle system can be controlled, the whole vehicle driving problem is quickly positioned, a software calibration test scheme is formulated, and the whole vehicle driving feeling is improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a vehicle drivability debugging 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] When testing the driving conditions of the whole vehicle, the whole vehicle has a jitter problem, and data analysis is required through CAN network signals, but the data contains motor speed and torque, engine speed and torque. Because hybrid models have multiple power sources to drive the vehicle, the whole vehicle has a jitter problem, and it is difficult to analyze the source of the jitter from the data. In the traditional solution, the cause of the jitter can be analyzed through professional NVH equipment, but NVH equipment is expensive and it takes a long time to arrange the collection points. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a vehicle drivability debugging method and system to solve the problem that in the traditional solution, the cause of the vibration can be analyzed through professional NVH equipment, but the NVH equipment is expensive and it takes a long time to arrange the collection points.

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

[0006] A vehicle drivability debugging method, wherein the method comprises:

[0007] When it is detected in real time that the vehicle is in a normal driving state, the hybrid system in the vehicle is controlled to enter a parallel working state accordingly;

[0008] When it is detected in real time that the driving power of the driving motor inside the vehicle is less than a preset power threshold, activating the parallel single power source mode of the hybrid system;

[0009] Real-time collection of driving parameters corresponding to the vehicle in the parallel single power source mode, and real-time determination of whether the vehicle is shaking according to the driving parameters;

[0010] The clutch, gearbox and engine inside the vehicle are calibrated according to the judgment result, and the driving performance of the vehicle is tested in real time according to the performance of the driving wheel end of the engine.

[0011] The beneficial effects of the present invention are as follows: Key point 1: The parallel dual-power source drivability test condition is self-identified by software, and the drive motor system capacity is limited by controlling variables, thereby realizing self-identification and enabling single power source control under parallel conditions. After identifying the condition, the system can perform preliminary calibration for engine parameters and gearbox parameters to eliminate interference and influence caused by motor torque;

[0012] Key point 2: By identifying the parallel fixed gear mode and activating this operating condition test condition when the motor torque is less than a certain value, it is possible to activate this operating condition when the vehicle requires a smaller motor torque, and the activation of this operating condition will not affect the drivability of the vehicle.

[0013] Furthermore, the method further comprises:

[0014] When it is detected that the hybrid system is in the series mode, the discharge power generated by the battery pack in the hybrid vehicle and the power generated by the generator within 10 seconds are detected in real time;

[0015] Furthermore, the method further comprises:

[0016] When it is detected in real time that the hybrid system is in the series mode, the hybrid system is controlled to correspondingly exit the parallel single power source mode.

[0017] The method further comprises:

[0018] When it is detected in real time that the hybrid system is in the parallel single power source mode, the value in the torque system corresponding to the drive motor is cleared to zero, wherein the drive power of the drive wheel end is equal to the available power of the engine.

[0019] Furthermore, when it is detected in real time that the driving performance test of the vehicle is completed, the value in the torque system corresponding to the driving motor is restored to the original value.

[0020] The second aspect of the embodiment of the present invention proposes:

[0021] A vehicle drivability debugging system, wherein the system comprises:

[0022] A detection module, for controlling the hybrid system in the vehicle to enter a parallel operating state when it is detected in real time that the vehicle is in a normal driving state;

[0023] A first processing module, configured to activate a parallel single power source mode of the hybrid system when it is detected in real time that the driving power of the driving motor inside the vehicle is less than a preset power threshold;

[0024] A second processing module is used to collect the driving parameters of the vehicle in the parallel single power source mode in real time, and determine in real time whether the vehicle is shaking according to the driving parameters;

[0025] The third processing module is used to calibrate the clutch, gearbox and engine inside the vehicle according to the judgment result, and test the driving performance of the vehicle according to the driving wheel end of the engine in real time.

[0026] Furthermore, the method further comprises:

[0027] When it is detected in real time that the hybrid system is in the series mode, the hybrid system is controlled to correspondingly exit the parallel single power source mode.

[0028] Furthermore, the method further comprises:

[0029] When it is detected in real time that the hybrid system is in the parallel single power source mode, the value in the torque system corresponding to the drive motor is cleared to zero, wherein the drive power of the drive wheel end is equal to the available power of the engine.

[0030] Furthermore, when it is detected in real time that the driving performance test of the vehicle is completed, the value in the torque system corresponding to the driving motor is restored to the original value.

[0031] The third aspect of the embodiment of the present invention proposes:

[0032] A computer comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the vehicle drivability debugging method as described above is implemented when the processor executes the computer program.

[0033] The fourth aspect of the embodiments of the present invention proposes:

[0034] A readable storage medium stores a computer program, wherein the program, when executed by a processor, implements the vehicle drivability debugging method as described above.

[0035] 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

[0036] Figure 1 A flow chart of a vehicle drivability debugging method provided by a first embodiment of the present invention;

[0037] Figure 2 A hybrid architecture diagram of a vehicle drivability debugging method provided in a second embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the test effect in the vehicle drivability debugging method provided in the second embodiment of the present invention;

[0039] Figure 4 This is a structural block diagram of a vehicle drivability debugging system provided in the third embodiment of the present invention.

[0040] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] See also Figure 1 , which is shown as a vehicle drivability debugging method provided by the first embodiment of the present invention. The vehicle drivability debugging method provided by this embodiment can quickly and effectively complete the vehicle's drivability testing, thereby correspondingly improving work efficiency.

[0045] Specifically, this embodiment provides:

[0046] A vehicle drivability debugging method specifically comprises the following steps:

[0047] Step S10, when it is detected in real time that the vehicle is in a normal driving state, controlling the hybrid system inside the vehicle to enter a parallel working state accordingly;

[0048] Step S20, when it is detected in real time that the driving power of the driving motor inside the vehicle is less than a preset power threshold, activating the parallel single power source mode of the hybrid system;

[0049] Step S30, collecting driving parameters corresponding to the vehicle in the parallel single power source mode in real time, and determining in real time whether the vehicle is shaking according to the driving parameters;

[0050] Step S40, calibrating the clutch, gearbox and engine inside the vehicle according to the judgment result, and testing the driving performance of the vehicle in real time according to the driving wheel end performance of the engine.

[0051] Second embodiment

[0052] See also Figures 2 to 3 , the overall idea provided by this embodiment is:

[0053] 1. When the hybrid mode is in parallel mode, the wheel-end system capacity is equal to the available power of the engine plus the available power of the battery pack;

[0054] 2. Identify that the hybrid mode is in the parallel fixed gear state, and identify that the drive motor torque is less than a certain calibration value and the test flag is set, then activate the parallel single power source test condition;

[0055] 3. When the parallel single power source test condition is activated, the drive motor torque system capacity is reset to 0, that is, the wheel-end system capacity is equal to the available power of the engine;

[0056] 4. When the hybrid mode is identified as being in series mode, the parallel single power source test condition will be exited;

[0057] 5. After exiting the test condition, restore the drive motor torque system capacity to the original value, that is, the drive motor external characteristics.

[0058] Strategy Implementation

[0059] Phase 1: The driver drives normally into parallel operation, and the engine and drive motor act on the wheel ends together;

[0060] The second stage: the driver releases the accelerator and recognizes that the drive motor torque is less than a certain value, the parallel single power source mode is activated and the drive motor capacity is limited. ;

[0061] Phase 3: In the parallel single power source mode, only the engine and clutch affect the wheel-end torque. Under this condition, the drivability problem is tested, the whole vehicle shaking condition is reproduced, and whether there is a shaking problem when only the engine is driven;

[0062] Phase 4: Analyze data in parallel single power source mode, calibrate the clutch, gearbox, and engine based on real-time data, quickly define vehicle drivability issues, and develop a calibration plan

[0063] Phase 5: Exit the parallel single power source mode and enter the series mode to restore the drive motor capability.

[0064] See also Figure 4 , the third embodiment of the present invention provides:

[0065] A vehicle drivability debugging system, wherein the system comprises:

[0066] A detection module, for controlling the hybrid system in the vehicle to enter a parallel operating state when it is detected in real time that the vehicle is in a normal driving state;

[0067] A first processing module, configured to activate a parallel single power source mode of the hybrid system when it is detected in real time that the driving power of the driving motor inside the vehicle is less than a preset power threshold;

[0068] A second processing module is used to collect the driving parameters of the vehicle in the parallel single power source mode in real time, and determine in real time whether the vehicle is shaking according to the driving parameters;

[0069] The third processing module is used to calibrate the clutch, gearbox and engine inside the vehicle according to the judgment result, and test the driving performance of the vehicle according to the driving wheel end of the engine in real time.

[0070] 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 drivability debugging method as described above when executing the computer program.

[0071] A fifth embodiment of the present invention provides a readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the vehicle drivability debugging method as described above.

[0072] In summary, the vehicle drivability debugging method and system provided by the above embodiments of the present invention can quickly and effectively complete the drivability test of the vehicle, thereby correspondingly improving work efficiency.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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 variations 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 drivability debugging method, characterized in that: The method comprises: When it is detected in real time that the vehicle is in a normal driving state, the hybrid system in the vehicle is controlled to enter a parallel working state accordingly; When it is detected in real time that the driving power of the driving motor inside the vehicle is less than a preset power threshold, activating the parallel single power source mode of the hybrid system; collecting driving parameters corresponding to the vehicle in the parallel single power source mode in real time, and determining in real time whether the vehicle is shaking according to the driving parameters; The clutch, gearbox and engine inside the vehicle are calibrated according to the judgment result, and the driving performance of the vehicle is tested in real time according to the performance of the driving wheel end of the engine.

2. The vehicle drivability debugging method according to claim 1, characterized in that: The method further comprises: When it is detected in real time that the hybrid system is in the parallel operating condition, the driving power of the vehicle wheel-end system is equal to the sum of the available power of the engine and the available power of the battery pack inside the vehicle.

3. The vehicle drivability debugging method according to claim 2, characterized in that: The method further comprises: When it is detected in real time that the hybrid system is in the series mode, the hybrid system is controlled to correspondingly exit the parallel single power source mode.

4. The vehicle drivability debugging method according to claim 3, characterized in that: The method further comprises: When it is detected in real time that the hybrid system is in the parallel single power source mode, the value in the torque system corresponding to the drive motor is cleared to zero, wherein the drive power of the drive wheel end is equal to the available power of the engine.

5. The vehicle drivability debugging method according to claim 2, characterized in that: When it is detected in real time that the driving performance test of the vehicle is completed, the value in the torque system corresponding to the driving motor is restored to the original value.

6. A vehicle drivability debugging system, characterized in that: The system comprises: A detection module, used for controlling the hybrid system in the vehicle to enter a parallel working state when it is detected in real time that the vehicle is in a normal driving state; A first processing module, configured to activate a parallel single power source mode of the hybrid system when it is detected in real time that the driving power of the driving motor inside the vehicle is less than a preset power threshold; A second processing module is used to collect the driving parameters of the vehicle in the parallel single power source mode in real time, and determine in real time whether the vehicle is shaking according to the driving parameters; The third processing module is used to calibrate the clutch, gearbox and engine inside the vehicle according to the judgment result, and test the driving performance of the vehicle according to the driving wheel end performance of the engine in real time.

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 drivability debugging 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 drivability debugging method according to any one of claims 1 to 7 is implemented.

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