Adaptive adjustment method and system, electronic control unit, storage medium and vehicle

Abstract

The invention relates to a self-adaptive adjustment method for electric power steering torque compensation, a self-adaptive adjustment system for electric power steering torque compensation, an electric power steering system, an electronic control unit, a computer readable storage medium and a vehicle. The self-adaptive adjustment method comprises the following steps: S110, receiving a load signal of a vehicle, a vehicle speed signal of the vehicle and an initial power-assisted steering torque signal; s120, whether the load is within a load preset range or not is judged through the load signal, and whether the vehicle speed is within a vehicle speed preset range or not is judged through the vehicle speed signal; s130, when the load is within a load preset range and the vehicle speed is within a vehicle speed preset range, determining a correction coefficient from a lookup table based on the load and the vehicle speed; and S140, the initial power-assisted steering torque is corrected according to the correction coefficient, and the final power-assisted steering torque of the vehicle is obtained. By means of the self-adaptive adjusting method, a driver can easily steer when the vehicle load is high.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular, to an adaptive adjustment method for electric power steering torque compensation, an adaptive adjustment system for electric power steering torque compensation, an electric power steering system, an electronic control unit, a computer-readable storage medium, and a vehicle. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present disclosure.

[0003] Automobile steering systems include mechanical systems, hydraulic systems, electro-hydraulic systems, electric systems, and wire control systems. With the continuous development of science and technology, electric power steering systems are currently the mainstream of the market. Electric power steering systems are a power steering system that relies on motors to provide auxiliary torque. Electric power steering systems are mainly composed of sensors, power motors, motor reduction mechanisms, controllers, and other parts. When the driver manipulates the steering wheel, the torque sensor detects the direction of the steering wheel and the size of the torque, and converts these signals into voltage signals and transmits them to the electronic control unit. The electronic control unit sends instructions to the motor controller based on the torque voltage signal, rotation direction, and vehicle speed signal detected by the torque sensor, so that the motor outputs a steering torque of corresponding size and direction, thereby generating auxiliary power. When the car does not turn, the electronic control unit does not send instructions to the motor controller, and the motor does not work.

[0004] Application Contents

[0005] According to a first aspect of the present application, there is provided an adaptive adjustment method for electric power steering torque compensation, the adaptive adjustment method comprising the following steps:

[0006] S110, receiving a vehicle load signal, a vehicle speed signal, and an initial steering assist torque signal;

[0007] S120, determining whether the load is within a preset load range according to the load signal and determining whether the vehicle speed is within a preset vehicle speed range according to the vehicle speed signal;

[0008] S130, when the load is within a preset load range and the vehicle speed is within a preset vehicle speed range, determining a correction coefficient from a lookup table based on the load and the vehicle speed;

[0009] S140: Correct the initial steering assist torque according to the correction coefficient to obtain a final steering assist torque of the vehicle.

[0010] Optionally, in the above-mentioned adaptive adjustment method, the initial steering assist torque is corrected according to the correction coefficient to obtain the final steering assist torque of the vehicle, including:

[0011] The correction coefficient is multiplied by the initial steering assist torque, and the multiplication result is used as the final steering assist torque of the vehicle.

[0012] Optionally, in the above-mentioned adaptive adjustment method, the vehicle speed signal is obtained through a vehicle speed sensor, and the load signal is obtained through a load sensor.

[0013] According to a second aspect of the present application, there is provided an adaptive adjustment system for electric power steering torque compensation, the adaptive adjustment system comprising:

[0014] A receiving module, used for receiving a vehicle load signal, a vehicle speed signal and an initial steering assist torque signal;

[0015] A judging module, configured to judge whether the load is within a preset load range according to the load signal and whether the vehicle speed is within a preset vehicle speed range according to the vehicle speed signal;

[0016] a determination module, configured to determine a correction coefficient from a lookup table based on the load and the vehicle speed when the load is within a preset load range and the vehicle speed is within a preset vehicle speed range; and

[0017] The correction module is used to correct the initial steering assist torque according to the correction coefficient to obtain the final steering assist torque of the vehicle.

[0018] Optionally, in the above-mentioned adaptive adjustment system, the adaptive adjustment system includes a vehicle speed sensor for acquiring a vehicle speed signal and a load sensor for acquiring a load signal.

[0019] According to a third aspect of the present application, an electric power steering system is provided, the electric power steering system comprising an output module for outputting an initial steering assist torque signal to a receiving module of the above-mentioned adaptive adjustment system.

[0020] Optionally, in the above-mentioned electric power steering system, the electric power steering system includes a torque sensor for acquiring a torque signal on a steering wheel of the vehicle.

[0021] According to a fourth aspect of the present application, an electronic control unit is provided, comprising: a processor and a memory, wherein a program is stored in the memory, and the program implements the above-mentioned adaptive adjustment method when executed by the processor.

[0022] According to a fifth aspect of the present application, a vehicle is provided, comprising the above-mentioned adaptive adjustment system and the above-mentioned electric power steering system.

[0023] According to a sixth aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a program, and when the program is executed by a processor, the above-mentioned adaptive adjustment method is implemented.

[0024] It can be understood that the adaptive adjustment method for electric power steering torque compensation disclosed in the present application improves the steering assist through electric power steering torque compensation, so that the driver can achieve easy steering even when the vehicle load is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0026] Figure 1 A flow chart of an adaptive adjustment method for electric power steering torque compensation disclosed in the present application is shown;

[0027] Figure 2 A schematic block diagram of an adaptive adjustment system for electric power steering torque compensation disclosed in the present application is shown; and

[0028] Figure 3 A lookup table corresponding to the vehicle speed-load-correction coefficient of the adaptive adjustment system for electric power steering torque compensation disclosed in the present application is shown. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. The terms used in the description of various examples in this application are only for the purpose of describing specific examples, and are not intended to be limiting. Unless the context clearly indicates otherwise, if the number of elements is not specifically limited, the element can be one or more.

[0030] Figure 1 FIG. 1 is a flow chart of an adaptive adjustment method 100 for electric power steering torque compensation according to an exemplary embodiment of the present application. Figure 1In step S110, a load signal of the vehicle, a speed signal of the vehicle and an initial steering assist torque signal are received. In step S120, the load signal is used to determine whether the load is within a preset load range and the speed signal is used to determine whether the speed is within a preset speed range. In step S130, when the load is within a preset load range and the speed is within a preset speed range, a correction coefficient is determined from a lookup table based on the load and the speed. In step S140, the initial steering assist torque is corrected according to the correction coefficient to obtain a final steering assist torque of the vehicle. During the driving process of the vehicle, no matter how large the vehicle load is, the steering assist can be increased by electric power steering torque compensation, so that the driver can achieve easy steering when the vehicle load is high. In step S150, after obtaining the final steering assist torque, the adaptive adjustment method ends. In another case, when the conditions that the load is within the preset load range and the speed is within the preset speed range are not met, the adaptive adjustment method ends.

[0031] In the above embodiment, the initial steering assist torque is corrected according to the correction coefficient to obtain the final steering assist torque of the vehicle, including: multiplying the correction coefficient by the initial steering assist torque, and taking the multiplication result as the final steering assist torque of the vehicle

[0032] In the above-mentioned embodiment, the vehicle speed signal is obtained by a vehicle speed sensor, and the load signal is obtained by a load sensor.

[0033] Figure 2 FIG. 2 shows a schematic block diagram of an adaptive adjustment system 200 for electric power steering torque compensation according to an embodiment of the present disclosure. Figure 2 According to the embodiment of the present application, the adaptive adjustment system 200 may include a receiving module 210, a judging module 220, a determining module 230, and a correcting module 240, etc.

[0034] For the purpose of illustration, the following Figure 1 and Figure 2 An adaptive adjustment method 100 is described.

[0035] In step 110, a load signal of the vehicle, a speed signal of the vehicle, and an initial steering assist torque signal are received. In some embodiments, step S110 is implemented by a receiving module 210. During driving, a vehicle often encounters dangerous situations due to excessive speed, so the speed signal is very important for the adaptive adjustment system 200. The adaptive adjustment system 200 includes, for example, a load sensor and a speed sensor. Specifically, the load signal can be installed at the chassis of the vehicle to obtain the vehicle load signal, such as the proportion of the current vehicle load to the rated load, and the speed sensor can be installed at or near the wheel to obtain the speed signal therethrough.

[0036] In step 120 , the load signal is used to determine whether the load is within a preset load range and the vehicle speed signal is used to determine whether the vehicle speed is within a preset vehicle speed range. If so, step S130 is performed. If not, the process ends. In some embodiments, step S120 is performed by the determination module 220 .

[0037] In step 130, when the load is within the preset load range and the vehicle speed is within the preset vehicle speed range, a correction coefficient is determined from a lookup table based on the load and the vehicle speed. In some embodiments, step S130 is implemented by the determination module 230. Figure 3 As shown, the lookup table is a table that correlates vehicle speed, load and correction coefficient, wherein the "load" in the lookup table refers to the proportion of the current vehicle load to the rated load, the "vehicle speed" in the lookup table refers to the current vehicle speed, and the "correction coefficient" in the lookup table is usually an empirical value obtained by a person skilled in the art through testing. For example, when the vehicle speed sensor detects that the current vehicle speed is 80km / h, and the load sensor detects that the current vehicle load accounts for 60% of the rated load, the corresponding correction coefficient can be found in the lookup table as 1.16.

[0038] In step 140, the initial steering assist torque is corrected according to the correction coefficient to obtain the final steering assist torque of the vehicle. In some embodiments, step S140 is implemented by the correction module 240. Specifically, the correction coefficient corrects the initial steering assist torque to obtain the final steering assist torque of the vehicle, including: multiplying the correction coefficient with the initial steering assist torque, and the multiplication result is used as the final steering assist torque of the vehicle.

[0039] In step S150, after the final steering assist torque is obtained, the adaptive adjustment method ends. In another case, when the conditions that the load is within the preset load range and the vehicle speed is within the preset vehicle speed range are not met, the adaptive adjustment method ends.

[0040] In addition, although specific functions are discussed above with reference to specific modules, it should be noted that the functions of the various modules discussed herein can be divided into multiple modules, and / or at least some functions of multiple modules can be combined into a single module. The specific module discussed herein performs an action including the specific module itself performing the action, or alternatively the specific module calls or otherwise accesses another component or module that performs the action (or performs the action in conjunction with the specific module). Therefore, the specific module that performs an action can include the specific module itself that performs the action and / or another module that the specific module calls or otherwise accesses to perform the action.

[0041] In addition, the present application also proposes an electric power steering system, which includes an output module for outputting an initial steering assist torque signal to a receiving module 210 of the adaptive adjustment system 200. Further, the electric power steering system includes a torque sensor for acquiring a torque signal applied by a driver to a steering wheel. The electric power steering system can calculate an initial steering assist torque through the torque signal, and send the initial steering assist torque signal to the receiving module 210 of the adaptive adjustment system 200 for electric power steering torque compensation.

[0042] In addition, the present application also proposes an electronic control unit, which includes: a processor and a memory, wherein a program is stored in the memory, and when the program is executed by the processor, the above-mentioned adaptive adjustment method 100 is implemented.

[0043] In addition, the present application also proposes a vehicle, which includes the above-mentioned adaptive adjustment system 200 and the above-mentioned electric power steering system.

[0044] In addition, the present application also proposes a computer-readable storage medium, wherein the computer-readable storage medium stores a program, and when the program is executed by a processor, the above-mentioned adaptive adjustment method 100 is implemented.

[0045] Several specific implementations are listed above to explain in detail the adaptive adjustment method for electric power steering torque compensation, the adaptive adjustment system for electric power steering torque compensation, the electric power steering system, the electronic control unit, the computer-readable storage medium and the vehicle of the present application. These examples are only used to illustrate the principles and implementation methods of the present application, but not to limit the present application. Without departing from the spirit and scope of the present application, ordinary technicians in this field can also make various modifications and improvements. Therefore, all equivalent technical solutions should belong to the scope of the present application and be defined by the claims of the present application.

Claims

1. An adaptive adjustment method for electric power steering torque compensation, characterized in that: The adaptive adjustment method (100) comprises the following steps: S110, receiving a vehicle load signal, a vehicle speed signal, and an initial steering assist torque signal; S120, determining whether the load is within a preset load range according to the load signal and determining whether the vehicle speed is within a preset vehicle speed range according to the vehicle speed signal; S130, when the load is within a preset load range and the vehicle speed is within a preset vehicle speed range, determining a correction coefficient from a lookup table based on the load and the vehicle speed; S140: Correct the initial steering assist torque according to the correction coefficient to obtain a final steering assist torque of the vehicle.

2. The adaptive adjustment method according to claim 1, characterized in that: The initial steering assist torque is corrected according to the correction coefficient to obtain the final steering assist torque of the vehicle, including: The correction coefficient is multiplied by the initial steering assist torque, and the multiplication result is used as the final steering assist torque of the vehicle.

3. The adaptive adjustment method according to claim 1 or 2, characterized in that: The vehicle speed signal is obtained through a vehicle speed sensor, and the load signal is obtained through a load sensor.

4. An adaptive adjustment system for electric power steering torque compensation, characterized in that: The adaptive adjustment system (200) comprises: A receiving module (210), used for receiving a vehicle load signal, a vehicle speed signal and an initial steering assist torque signal; A judgment module (220), used to judge whether the load is within a preset load range through the load signal and whether the vehicle speed is within a preset vehicle speed range through the vehicle speed signal; A determination module (230) is used to determine a correction coefficient from a lookup table based on the load and the vehicle speed when the load is within a preset load range and the vehicle speed is within a preset vehicle speed range; and The correction module (240) is used to correct the initial steering assist torque according to the correction coefficient to obtain the final steering assist torque of the vehicle.

5. The adaptive adjustment system according to claim 4, characterized in that: The adaptive adjustment system (200) comprises a vehicle speed sensor for acquiring a vehicle speed signal and a load sensor for acquiring a load signal.

6. An electric power steering system, characterized in that: The electric power steering system comprises an output module for outputting an initial steering assist torque signal to a receiving module (210) of the adaptive adjustment system (200) according to claim 4 or 5.

7. The electric power steering system according to claim 6, characterized in that: The electric power steering system includes a torque sensor for acquiring a torque signal on a vehicle steering wheel.

8. An electronic control unit, characterized in that: The electronic control unit comprises: a processor and a memory, wherein a program is stored in the memory, and when the program is executed by the processor, the adaptive adjustment method (100) according to any one of claims 1 to 3 is implemented.

9. A vehicle, characterized in that: The vehicle comprises an adaptive adjustment system (200) according to claim 4 or 5 and an electric power steering system according to claim 6 or 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program, and when the program is executed by a processor, the adaptive adjustment method (100) according to any one of claims 1 to 3 is implemented.

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