Vehicle traction control function activation system and activation method

Abstract

The invention discloses a vehicle traction control function activation system and method, and the activation system comprises a detection module, a judgment module and a control module. The activation method comprises the steps that the judgment module receives vehicle operation condition data transmitted by the detection module; the judgment module identifies whether the vehicle slips or not, compares the slip severity and judges whether to activate the traction braking function or not; the judgment module sends control data, and the control module controls the driving torque and the braking torque for braking. According to the method, the control activation strategy based on the opening degree of the accelerator pedal is introduced, and activation of the vehicle traction control system is recognized firstly; comprising the following steps: comparing the slip severity corresponding to different wheel end torques and vehicle speeds with the slip severity judged based on a target slip frequency, comparing the timing time with the threshold time, and controlling and activating a traction force control function.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle skidding control, and in particular to a vehicle traction control function activation system and activation method. Background Art

[0002] In the wire control brake system of modern vehicles, there are usually multiple functional modules including anti-lock braking system (ABS), traction control system (TCS), vehicle dynamic control system (VDC), etc. Among them, the traction control system (TCS) is an important part of the vehicle safety system, which is specially used to optimize the driving performance of the vehicle in starting, acceleration and slipping conditions. When the drive wheel is detected to be slipping or losing traction, it monitors in real time and automatically adjusts the power output to ensure that the vehicle can be driven stably and reduce the unsafe factors caused by slipping. When the drive wheel of the vehicle slips, the TCS system will intervene quickly to reduce the degree of vehicle slippage, restore its traction with the road, and restore the stable driving state of the vehicle, thereby improving the driving safety of the vehicle.

[0003] At present, for vehicles equipped with ESC (electronic stability control) products on the market, the activation of the traction control function will first determine whether the drive wheel is slipping, then determine the severity of the slip, and then perform traction control to suppress the slip and restore the effective traction between the wheel and the ground. However, when the driver starts on the ice and applies different throttle openings (for example, 10% and 100% throttle openings), the severity of the vehicle's drive wheel slipping is the same in both cases, so the timing of traction control intervention is the same, but the torque output is greater under a larger throttle, resulting in longer vehicle slipping, more serious deviation, and slow acceleration. Summary of the invention

[0004] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a vehicle traction control function activation system and activation method.

[0006] In order to achieve the above objectives, in a first aspect, the present invention provides a vehicle traction control function activation system, comprising:

[0007] A detection module, the detection module is used to detect the vehicle operating conditions and send detection data;

[0008] A judgment module, the judgment module is used to read the detection data, identify whether the vehicle is slipping, compare the severity of the slipping, determine whether to activate the traction braking function, and send the judgment data;

[0009] A control module is used to read the judgment data and send the control data.

[0010] In some of the embodiments, the detection module includes a wheel speed sensor, a gyroscope sensor, an acceleration sensor, a brake pedal sensor, and an accelerator pedal sensor, and the detection module is electrically connected to the judgment module.

[0011] In some embodiments, the control module includes a driving torque controller and a braking torque controller, and the control module is electrically connected to the judgment module.

[0012] In a second aspect, the present invention further provides a method for activating a vehicle traction control function, which is performed by the vehicle traction control function activation system as described in the first aspect, and the activation method steps include:

[0013] S100, the judgment module receives the vehicle operating condition data transmitted by the detection module;

[0014] S200, the determination module identifies whether the vehicle is skidding, compares the severity of the skidding, and determines whether to activate the traction braking function;

[0015] S300, the judgment module sends control data, and the control module controls the driving torque and the braking torque to perform braking.

[0016] In some embodiments, the determination module identifies whether the vehicle is slipping, and the steps include:

[0017] S210, the judgment module identifies whether the vehicle is slipping and performs timing;

[0018] S220, the judgment module compares and determines a value of the slip severity based on the target slip and the throttle opening;

[0019] S230, the judgment module judges whether to activate the traction control function based on the value and the set threshold.

[0020] In some embodiments, the determination module identifies whether the vehicle is slipping and performs timing, and the steps include:

[0021] S211, the judgment module identifies whether the vehicle is skidding by detecting the vehicle operating condition data of the detection module;

[0022] S212, if there is no slip, the judgment module continues to receive the vehicle operating condition data; if there is slip, the judgment module starts timing when slip occurs.

[0023] In some embodiments, the judgment module compares and determines the value of the slip severity based on the target slip and the throttle opening, and the steps include:

[0024] S221, the judgment module calculates the skidding severity based on the target slip and the skidding severity based on the throttle opening respectively;

[0025] S222, the judgment module compares the skidding severity based on the target slip and the skidding severity based on the throttle opening;

[0026] S223, the judgment module takes the larger value based on the comparison result.

[0027] In some embodiments, the determining module determines whether to activate the traction control function, the steps comprising:

[0028] S231, the judgment module looks up a table to obtain a threshold time corresponding to the severity of the slip;

[0029] S232, the judgment module compares the timing time and the threshold time to judge whether to activate the traction control function;

[0030] S233: If the timing time is greater than the threshold time, a control signal is sent to activate the traction control function; if the timing time is less than or equal to the threshold time, no control signal is sent to activate the traction control function.

[0031] In some of the embodiments, the threshold time is obtained by looking up a table based on the wheel end torque and the vehicle speed change amplitude, and the threshold time is used to determine whether to activate the traction braking function.

[0032] In some of these embodiments, the slip severity includes mild slip, moderate slip and severe slip.

[0033] The present invention has the following beneficial effects:

[0034] The present invention introduces a control activation strategy based on the accelerator pedal opening, firstly recognizes that the vehicle traction control system is activated, and then controls the activation of the traction control function by comparing the slip severity based on different throttle openings, including the slip severity corresponding to different wheel-end torques and vehicle speeds, with the slip severity judged based on the target slip, and then comparing the timing time and the threshold time, taking the larger one. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the principle of the vehicle traction control function activation system proposed by the present invention;

[0036] Figure 2 The process diagram of the method for activating the vehicle traction control function proposed by the present invention is as follows Figure 1;

[0037] Figure 3 The process diagram of the method for activating the vehicle traction control function proposed by the present invention is as follows Figure 2 ;

[0038] Figure 4 The process diagram of the method for activating the vehicle traction control function proposed by the present invention is as follows Figure 3 .

[0039] Legend:

[0040] 1. Detection module; 11. Wheel speed sensor; 12. Gyroscope sensor; 13. Acceleration sensor; 14. Brake pedal sensor; 15. Accelerator pedal sensor; 2. Judgment module; 3. Control module; 31. Drive torque controller; 32. Brake torque controller. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The embodiment of the present application provides a vehicle traction control function activation system and activation method, which solves the problem in the prior art that when the driver starts on an icy surface and applies different throttle openings (for example, 10% and 100% throttle openings), the vehicle drive wheel slip severity is the same in both cases, so the timing of traction control intervention is the same, but the torque output is greater under a larger throttle, which causes the vehicle to slip for a longer time, run more seriously, and accelerate slowly. The present application introduces a control activation strategy based on the throttle pedal opening, first identifies the activation of the vehicle traction control system, and then controls the activation of the traction control function by comparing the slip severity based on different throttle openings, including the corresponding slip severity under different wheel end torques and vehicle speeds, with the slip severity judged based on the target slip difference, and taking the larger one, and then comparing the timing time and the threshold time.

[0043] Please refer to the following examples for details:

[0044] Reference Figure 1 The present invention provides an embodiment of a vehicle traction control function activation system, the specific structure of which includes: a detection module 1, a judgment module 2 and a control module 3.

[0045] Among them, the detection module 1 is used to monitor the operating conditions of the vehicle in real time, collect and send various key data, such as vehicle speed, rotation speed, wheel speed difference, etc., so as to provide basic data for subsequent judgment. After receiving the detection data, the judgment module 2 will analyze and process the data to determine whether the vehicle has skidded. If skidding occurs, the judgment module 2 will further evaluate the severity of the skidding and decide whether to activate the traction control function of the traction braking system (TCS) according to the preset threshold. The judgment result will be converted into judgment data and sent to the control module 3; the control module 3 adjusts the wheel torque and brake torque according to the received judgment data to help the vehicle restore a stable driving state and ensure the safe driving of the vehicle under bad road conditions.

[0046] Furthermore, the detection module 1 is composed of a plurality of sensors, each of which is responsible for collecting different data related to the vehicle's driving state. These sensors are electrically connected to the judgment module 2, and transmit the vehicle's running data to the judgment module 2 in real time for processing and analysis:

[0047] (1) Wheel speed sensor 11: used to monitor the rotation speed of each wheel. By detecting the difference in the rotation speeds of each wheel, it is determined whether the wheel is slipping. If the rotation speed of a wheel is too different from that of other wheels, it may indicate that the wheel is slipping.

[0048] (2) Gyro sensor 12: By monitoring the yaw angle and pitch angle of the vehicle, the gyro sensor 12 can reflect the changes in the vehicle's posture in real time, helping to determine whether the vehicle loses stability or has an abnormal state such as side slip;

[0049] (3) Acceleration sensor 13: responsible for monitoring the acceleration change of the vehicle, helping to identify whether the vehicle is accelerating or decelerating suddenly. Through the real-time collection of acceleration data, the judgment module 2 can make a detailed analysis of the vehicle's motion state and determine whether traction control or braking intervention is required;

[0050] (4) Brake pedal sensor 14: detects the driver's brake pedal operation signal, reflecting the driver's braking intention. When the brake pedal sensor 14 detects the braking signal, the judgment module 2 can analyze the current deceleration of the vehicle and determine whether a higher intensity braking intervention is required;

[0051] (5) Accelerator pedal sensor 15: monitors the opening of the accelerator pedal. Based on the feedback from the accelerator pedal sensor 15, the judgment module 2 can evaluate the acceleration of the vehicle to ensure that the vehicle power output matches the road conditions and prevent skidding caused by excessive acceleration.

[0052] The joint judgment mechanism of slip and throttle opening can better adapt to different driving environments, especially under adverse road conditions. The adaptability of throttle opening can optimize the traction control response. The use of timing mechanism and threshold comparison to judge the duration of slip can effectively avoid premature or excessive intervention in traction control, reduce intervention in the driver, improve driving comfort, and enable the vehicle to maintain good stability under various driving conditions.

[0053] Furthermore, the control module 3 is composed of a driving torque controller 31 and a braking torque controller 32: the driving torque controller 31 is responsible for adjusting the output torque of the engine and controlling the torque output of the power source according to the instructions of the judgment module 2 to prevent the wheels from slipping due to excessive torque. If the judgment module 2 determines that the slip phenomenon is more serious, the driving torque controller 31 will reduce the power output to ensure stable driving of the vehicle; the dynamic torque controller intervenes in the braking system according to the instructions of the judgment module 2. When the judgment module 2 detects that a certain wheel is slipping, the braking torque controller 32 will specifically apply braking force to the slipping wheel to help restore traction and prevent the vehicle from losing control. The control module 3 can effectively adjust the traction and braking force of the vehicle through precise torque control to ensure that the vehicle remains safe and stable under complex or harsh driving conditions.

[0054] Reference Figure 2 The present invention also provides an embodiment of a method for activating a vehicle traction control function, which is executed by the vehicle traction control function activation system in the above embodiment, and the activation method steps include:

[0055] S100, the determination module 2 receives the vehicle operating condition data transmitted by the detection module 1;

[0056] S200, the determination module 2 identifies whether the vehicle is skidding, compares the severity of the skidding, and determines whether to activate the traction braking function;

[0057] S300, the judgment module 2 sends control data, and the control module 3 controls the driving torque and the braking torque to perform braking.

[0058] Please continue reading Figure 3 In this embodiment, the judging module 2 identifies whether the vehicle is slipping, and the steps include:

[0059] S210, the judgment module 2 identifies whether the vehicle is slipping and performs timing;

[0060] S220, judging module 2 compares and determines a value of the slip severity based on the target slip and the throttle opening;

[0061] S230, the judgment module 2 judges whether to activate the traction control function based on the value and the set threshold.

[0062] Exemplarily, the judgment module 2 receives the vehicle operating condition data transmitted by the detection module 1, and judges whether there is a slip phenomenon through the wheel speed difference, etc. Generally, the loss of traction of the vehicle is manifested as an increase in the speed difference between the driving wheel (such as the front wheel or the rear wheel) and the non-driving wheel. After confirming that the vehicle is slipping, the judgment module 2 starts timing, the purpose of which is to determine the duration and change trend of the slip, and then determine whether to activate the traction control function.

[0063] Please continue reading Figure 4 In this embodiment, the judging module 2 identifies whether the vehicle is slipping and performs timing, and the steps include:

[0064] S211, judging module 2 identifies whether the vehicle is skidding by detecting the vehicle operating condition data of detection module 1;

[0065] S212, if there is no slip, the judgment module 2 continues to receive the vehicle operating condition data; if there is slip, the judgment module 2 starts timing when slip occurs.

[0066] Please continue reading Figure 4 In this embodiment, the judgment module 2 compares and determines the value of the slip severity based on the target slip and the throttle opening, and the steps include:

[0067] S221, the judgment module 2 calculates the skidding severity based on the target slip and the skidding severity based on the throttle opening respectively;

[0068] S222, the judgment module 2 compares the skidding severity based on the target slip and the skidding severity based on the throttle opening;

[0069] S223, the judgment module 2 takes the larger value based on the comparison result.

[0070] Please continue reading Figure 4 In this embodiment, the judging module 2 judges whether to activate the traction control function, and the steps include:

[0071] S231, the judgment module 2 looks up a table to obtain a threshold time corresponding to the severity of the slip;

[0072] S232, the judgment module 2 compares the timing time and the threshold time to determine whether to activate the traction control function;

[0073] S233: If the timing time is greater than the threshold time, a control signal is sent to activate the traction control function; if the timing time is less than or equal to the threshold time, no control signal is sent to activate the traction control function.

[0074] It should be explained in detail that slip refers to the difference between the actual speed of the wheel and the theoretical speed of the wheel, indicating the loss of traction between the wheel and the road surface. The slip calculation formula is: slip = (V 理论 -V 实际 ) / V 理论 ; Among them, V 理论 V is the theoretical speed of the wheel without slip; 实际 is the actual speed; the greater the slip, the more severe the slip.

[0075] The throttle opening directly affects the power output of the engine. The throttle opening is closely related to the acceleration state of the vehicle and is usually expressed as a percentage. For example, a 100% throttle opening means full throttle, and 0% means no throttle. The throttle opening is monitored by a sensor, so the slip value needs to be combined to determine the severity of the skidding. If the throttle opening is large, but the slip value is also large, it means that while the vehicle is outputting power, the tires cannot effectively transfer power to the ground, and the skidding is severe. By looking up the table to get the preset threshold time and the timing time for comparison, it is determined whether to activate traction control.

[0076] The judgment module 2 will look up a table to obtain a corresponding threshold time based on the severity of the vehicle's skidding, combined with the linear relationship between the wheel-end torque and the speed change range, to determine whether to activate the traction braking function. Among them, wheel-end torque refers to the driving torque output by each wheel of the vehicle. If the wheel slips due to too little friction, the wheel-end torque will drop rapidly. Combined with the size of the wheel-end torque, it can be evaluated whether the vehicle is in a skidding state; speed change range: when the vehicle slips, there will be a difference between the wheel speed and the actual speed.

[0077] Based on the target slip, the severity of skidding can be divided into: mild skidding: the slip is less than a certain threshold (for example, <5%), indicating that the wheel has slightly lost adhesion; moderate skidding: the slip is within a certain range (for example, 5%-15%), and the wheel has lost a certain amount of adhesion; severe skidding: the slip is greater than a certain threshold (for example, >15%), indicating that the wheel has severe skidding, which may cause the vehicle to lose control.

[0078] The judgment module 2 will monitor the current timer value in real time and compare it with the threshold time obtained by looking up the table: if the timing time is greater than the threshold time, it means that the slip phenomenon has continued for a sufficient time, and the system should immediately take intervention measures to stabilize the vehicle's traction. At this time, the judgment module 2 will send a control signal to the traction control module 3 to activate the traction control function, adjust the engine output power or control the wheel speed through braking to prevent the slip phenomenon from worsening; if the timing time is less than or equal to the threshold time, it means that the slip phenomenon has not continued to a sufficient extent, and the system believes that there is no need for traction control intervention, so the judgment module 2 will not send a control signal and the traction control function will not be activated.

[0079] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the vehicle traction control function activation system in the embodiment of the present application is implemented.

[0080] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods and devices according to the embodiments of the present invention. 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 terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the process. 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.

[0081] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product 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.

[0082] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement 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.

[0083] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle traction control function activation system, characterized in that: include: A detection module (1), the detection module (1) is used to detect the vehicle operating conditions and send detection data; A judgment module (2), the judgment module (2) is used to read the detection data, identify whether the vehicle is slipping, compare the severity of the slipping, determine whether to activate the traction braking function, and send the judgment data; A control module (3), wherein the control module (3) is used to read the judgment data and send the control data.

2. The vehicle traction control function activation system according to claim 1, characterized in that: The detection module (1) comprises a wheel speed sensor (11), a gyroscope sensor (12), an acceleration sensor (13), a brake pedal sensor (14) and an accelerator pedal sensor (15); the detection module (1) and the judgment module (2) are electrically connected.

3. The vehicle traction control function activation system according to claim 1, characterized in that: The control module (3) comprises a driving torque controller (21) and a braking torque controller (22), and the control module (3) and the judgment module (2) are electrically connected.

4. A method for activating a vehicle traction control function, characterized in that: The activation method is executed via the vehicle traction control function activation system according to any one of claims 1 to 3, and the activation method steps include: S100, the judgment module (2) receives the vehicle operating condition data transmitted by the detection module (1); S200, the determination module (2) identifies whether the vehicle is skidding, compares the severity of the skidding, and determines whether to activate the traction braking function; S300, the judgment module (2) sends control data, and the control module (3) controls the driving torque and the braking torque to perform braking.

5. The method for activating the vehicle traction control function according to claim 4, characterized in that: The judging module (2) identifies whether the vehicle is slipping, and the steps include: S210, the judgment module (2) identifies whether the vehicle is slipping and performs timing; S220, the judgment module (2) compares and determines a value of the slip severity based on the target slip and the throttle opening; S230, the judgment module (2) judges whether to activate the traction control function based on the value and the set threshold.

6. The method for activating the vehicle traction control function according to claim 4, characterized in that: The judging module (2) identifies whether the vehicle is slipping and performs timing, and the steps include: S211, the judgment module (2) identifies whether the vehicle is skidding by using the vehicle operating condition data of the detection module (1); S212, if there is no slip, the judgment module (2) continues to receive the vehicle operating condition data; if there is slip, the judgment module (2) starts timing when slip occurs.

7. The method for activating a vehicle traction control function according to claim 4, characterized in that: The judging module (2) compares and determines the value of the slip severity based on the target slip and the throttle opening, and the steps include: S221, the judgment module (2) calculates the slip severity based on the target slip and the slip severity based on the throttle opening respectively; S222, the judgment module (2) compares the slip severity based on the target slip and the slip severity based on the throttle opening; S223, the judgment module (2) takes the larger value based on the comparison result.

8. The method for activating a vehicle traction control function according to claim 4, characterized in that: The judging module (2) judges whether to activate the traction control function, the steps comprising: S231, the judgment module (2) looks up a table to obtain a threshold time corresponding to the severity of the slip; S232, the judgment module (2) compares the timing time with the threshold time to judge whether to activate the traction control function; S233: If the timing time is greater than the threshold time, a control signal is sent to activate the traction control function; if the timing time is less than or equal to the threshold time, no control signal is sent to activate the traction control function.

9. The method for activating the vehicle traction control function according to claim 8, characterized in that: The threshold time is obtained by looking up a table based on the wheel end torque and the vehicle speed change amplitude, and the threshold time is used to determine whether to activate the traction braking function.

10. The method for activating a vehicle traction control function according to claim 8, characterized in that: The severity of skidding includes mild skidding, moderate skidding and severe skidding.

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