A vehicle drivability debugging method and system

Abstract

The application provides a vehicle drivability debugging method and system, which comprises the following steps: when it is detected in real time that the vehicle is in a normal driving state, controlling a hybrid system in the vehicle to enter a parallel working condition; when it is detected in real time that the driving power of a driving motor in the vehicle is less than a preset power threshold, activating a parallel single power source mode of the hybrid system; collecting driving parameters generated by the vehicle in the parallel single power source mode in real time, and analyzing the driving state of the vehicle according to the driving parameters in real time; calibrating a clutch, a gearbox and an engine in the vehicle according to the data analysis result, and testing the driving performance of the vehicle according to the driving wheel end performance of the engine in real time. The application can control the collaborative control of the whole vehicle system multi-power source, quickly locate the vehicle driving problem, formulate a software calibration test scheme, and improve the vehicle driving experience.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to a method and system for adjusting vehicle drivability. Background Technology

[0002] With the advancement of technology and the rapid development of productivity, automobiles have become widespread in people's daily lives and have become an indispensable means of transportation, greatly facilitating people's lives.

[0003] When testing the drivability of the entire vehicle, vibration issues occurred. Data analysis using CAN network signals was necessary. However, the data included motor speed and torque, as well as engine speed and torque. Because hybrid vehicles have multiple power sources driving the vehicle, the vibration issue made it difficult to pinpoint the source of the vibration from the data. Traditional solutions could use specialized NVH equipment to analyze the cause of the vibration, but NVH equipment is expensive, and setting up data collection points takes considerable time. Summary of the Invention

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

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

[0006] A method for adjusting vehicle drivability, wherein the method includes:

[0007] When the vehicle is detected to be in a normal driving state in real time, the hybrid system inside the vehicle is controlled to enter the parallel operation mode accordingly.

[0008] When the driving power of the drive motor inside the vehicle is detected to be less than a preset power threshold in real time, the parallel single power source mode of the hybrid system is activated.

[0009] The vehicle's driving parameters generated in the parallel single power source mode are collected in real time, and the vehicle's vibration can be determined in real time based on the driving parameters.

[0010] Based on the judgment results, the clutch, gearbox and engine inside the vehicle are calibrated, and the driving performance of the vehicle is tested in real time based on the performance of the engine at the drive wheel end.

[0011] The beneficial effects of this invention are: Key point 1: By automatically identifying the driving performance test conditions of parallel dual power sources through software, the drive motor system capability is limited by controlling variables, thereby realizing the control of a single power source under parallel conditions. After identifying the condition, the system can perform initial calibration on the engine parameters and transmission parameters to eliminate interference and influence from motor torque.

[0012] Key Point 2: By identifying the parallel fixed gear mode and the test condition when the motor torque is less than a certain value, this test condition can be activated when the motor torque required by the whole vehicle is relatively small. Activation of this test condition will not affect the drivability of the whole vehicle.

[0013] Furthermore, the method also includes:

[0014] When the hybrid system is detected to be in the series mode, the discharge power generated by the battery pack in the hybrid vehicle and the power generation power of the generator are detected in real time within 10 seconds.

[0015] Furthermore, the method also includes:

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

[0017] The method further includes:

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

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

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

[0021] A vehicle drivability tuning system, wherein the system includes:

[0022] The detection module is used to control the hybrid system inside the vehicle to enter parallel operation mode when the vehicle is detected to be in normal driving state in real time.

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

[0024] The second processing module is used to collect the driving parameters generated by the vehicle in the parallel single power source mode in real time, and to determine whether the vehicle is shaking in real time based on the driving parameters.

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

[0026] Furthermore, the method also includes:

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

[0028] Furthermore, the method also includes:

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

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

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

[0032] A computer includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the vehicle drivability tuning method as described above.

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

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

[0035] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] Figure 1 A flowchart of a vehicle drivability tuning method provided in the first embodiment of the present invention;

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

[0038] Figure 3 This is a schematic diagram illustrating the test results in the vehicle drivability tuning method provided in the second embodiment of the present invention;

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

[0040] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0041] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0042] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Please see Figure 1 The figure shows a vehicle drivability tuning method provided in the first embodiment of the present invention. The vehicle drivability tuning method provided in this embodiment can quickly and effectively complete the vehicle drivability test, thereby improving work efficiency.

[0045] Specifically, this embodiment provides:

[0046] A method for adjusting vehicle drivability specifically includes the following steps:

[0047] Step S10: When it is detected in real time that the vehicle is in a normal driving state, control the hybrid system inside the vehicle to enter the parallel operation mode accordingly.

[0048] Step S20: When it is detected in real time that the driving power of the drive motor inside the vehicle is less than a preset power threshold, the parallel single power source mode of the hybrid system is activated.

[0049] Step S30: Real-time acquisition of the driving parameters generated by the vehicle in the parallel single power source mode, and real-time determination of whether the vehicle vibrates based on the driving parameters;

[0050] Step S40: Based on the judgment result, calibrate the clutch, gearbox and engine inside the vehicle, and test the driving performance of the vehicle in real time based on the performance of the engine at the drive wheel end.

[0051] Second Embodiment

[0052] Please see Figures 2 to 3 The overall approach provided in this embodiment is as follows:

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

[0054] 2. If the hybrid mode is identified as being in a parallel fixed gear state, and the drive motor torque is identified as being less than a certain calibrated value and the test flag is set, then the parallel single power source test condition is activated.

[0055] 3. When the parallel single power source test condition is activated, the torque system capability of the drive motor will be cleared to 0, that is, the wheel end system capability is equal to the available power of the engine.

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

[0057] 5. After exiting the test condition, restore the torque system capability of the drive motor to its original value, i.e., the external characteristics of the drive motor.

[0058] Strategy Implementation

[0059] Phase 1: The driver enters parallel operation mode during normal driving, and the engine and drive motor work together at the wheel ends;

[0060] Phase Two: When the driver releases the accelerator and the drive motor torque is detected to be less than a certain value, the parallel single power source mode is activated, limiting the drive motor's capacity.

[0061] Phase 3: In the parallel single power source mode, only the engine and clutch affect the wheel-end torque. Under this condition, we test the drivability issues, reproduce the vehicle vibration condition, and check whether there is a vibration problem when only the engine is driven.

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

[0063] Fifth stage: Exit the parallel single power source mode and enter the series mode to restore the drive motor's capability.

[0064] Please see Figure 4 The third embodiment of the present invention provides:

[0065] A vehicle drivability tuning system, wherein the system includes:

[0066] The detection module is used to control the hybrid system inside the vehicle to enter parallel operation mode when the vehicle is detected to be in normal driving state in real time.

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

[0068] The second processing module is used to collect the driving parameters generated by the vehicle in the parallel single power source mode in real time, and to determine whether the vehicle is shaking in real time based on the driving parameters.

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

[0070] The fourth embodiment of the present invention provides a computer, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the vehicle drivability tuning method as described above.

[0071] The 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 tuning method as described above.

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

[0073] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can reside 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 a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0075] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0076] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0077] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for adjusting vehicle drivability, characterized in that, The method includes: When the vehicle is detected to be in a normal driving state in real time, the hybrid system inside the vehicle is controlled to enter the parallel operation mode accordingly. When the driving power of the drive motor inside the vehicle is detected to be less than a preset power threshold in real time, the parallel single power source mode of the hybrid system is activated, wherein the value in the torque system corresponding to the drive motor is cleared to zero, and the driving power at the drive wheel end is equal to the available power of the engine. The vehicle's driving parameters generated in the parallel single power source mode are collected in real time, and the vehicle's vibration is determined in real time based on the driving parameters. Based on the judgment results, the clutch, gearbox and engine inside the vehicle are calibrated, and the driving performance of the vehicle is tested in real time based on the performance of the engine at the drive wheel end.

2. The vehicle drivability tuning method according to claim 1, characterized in that: The method further includes: When the hybrid system is detected to be in parallel operation in real time, 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 tuning method according to claim 1, characterized in that: When the driving performance test of the vehicle is detected to be completed in real time, the value in the torque system corresponding to the drive motor will be restored to its original value.

4. A vehicle drivability tuning system, characterized in that, The system for implementing the vehicle drivability tuning method as described in any one of claims 1 to 3, the system comprising: The detection module is used to control the hybrid system inside the vehicle to enter parallel operation mode when the vehicle is detected to be in normal driving state in real time. The first processing module is used to activate the parallel single power source mode of the hybrid system when it is detected in real time that the driving power of the drive motor inside the vehicle is less than a preset power threshold. The second processing module is used to collect the driving parameters generated by the vehicle in the parallel single power source mode in real time, and to determine whether the vehicle is shaking in real time based on the driving parameters. The third processing module is used to calibrate the clutch, gearbox and engine inside the vehicle based on the judgment result, and to test the driving performance of the vehicle in real time based on the performance of the engine at the drive wheel end.

5. 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, it implements the vehicle drivability tuning method as described in any one of claims 1 to 3.

6. A readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the vehicle drivability tuning method as described in any one of claims 1 to 3.

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