DE-102025146385-A1 - BRAKE CONTROL METHOD AND DEVICE FOR STARTING A VEHICLE, STORAGE MEDIUM AND VEHICLE

Abstract

Disclosed are a brake control method and a brake control device for starting a vehicle, a storage medium, and a vehicle. The brake control method for starting a vehicle comprises: sensing a real-time accelerator pedal opening or pedal position of a vehicle when the vehicle is in a parked state and determining whether the real-time accelerator pedal opening or pedal position satisfies a park release condition; sending an initial parking torque from an electric parking brake system of the vehicle to an electromechanical braking system when the park release condition is satisfied and generating, by the electromechanical braking system according to the initial parking torque, a clamping torque of the same magnitude as the initial parking torque; and receiving a real-time drive torque according to the real-time accelerator pedal opening or pedal position and controlling the clamping torque so that it decreases with an increase in the real-time drive torque.

Inventors

• Minqiang Li
• Meipeng Huang
• Zhiyou Zhang

Assignees

• NEXTEER AUTOMOTIVE (SUZHOU) CO., LTD.

Dates

Publication Date

20260513

Application Date

20251111

Priority Date

20241111

Claims (10)

1. A brake control method for starting a vehicle, characterized in that the method comprises: sensing a real-time accelerator pedal position of a vehicle when the vehicle is in a parked state, and determining whether the real-time accelerator pedal position satisfies a parking release condition; sending an initial parking torque from an electric parking brake system of the vehicle to an electromechanical brake system when the parking release condition is satisfied, and generating, by the electromechanical brake system according to the initial parking torque, a clamping torque of the same magnitude as the initial parking torque; and obtaining a real-time drive torque according to the real-time accelerator pedal position and controlling the clamping torque so that it decreases with an increase in the real-time drive torque.
2. Brake control procedure for starting a vehicle after Claim 1 , furthermore comprehensively: Determine whether the release of the original parking torque according to the clamping torque is complete.
3. Brake control procedure for starting a vehicle after Claim 2 , wherein determining whether the release of the original parking torque according to the clamping torque is complete comprises: if the clamping torque is less than a preset threshold, determining that the release of the original parking torque is complete; or if the clamping torque is greater than or equal to the preset threshold, determining that the release of the original parking torque is not complete, and continuing to control the clamping torque generated by the electromechanical braking system according to the real-time drive torque, such that it decreases synchronously until the clamping torque is less than the preset threshold.
4. Brake control procedure for starting a vehicle after Claim 3 , wherein the procedure, after determining that the release of the initial parking torque is complete, further comprises: steering the vehicle so that it starts moving in accordance with the drive torque corresponding to the accelerator pedal position of the vehicle at that time.
5. Brake control procedure for starting a vehicle after Claim 1 , wherein controlling the clamping torque so that it decreases with an increase in the real-time drive torque comprises: causing the clamping torque generated by the electromechanical braking system to decrease with an increase in the real-time drive torque, wherein the clamping torque and the real-time drive torque satisfy: V drive + V clamp = V original ; where V drive is the real-time drive torque, V clamp is the clamping torque, and V original is the original parking torque.
6. Brake control procedure for starting a vehicle after Claim 1 , wherein determining whether the real-time accelerator pedal position satisfies a parking release condition includes: if the real-time accelerator pedal position is greater than a preset opening, determining that the parking release condition is satisfied; or if the real-time accelerator pedal position is less than or equal to the preset opening, determining that the parking release condition is not satisfied.
7. Brake control procedure for starting a vehicle after Claim 1 , wherein sending an initial parking torque from an electric parking brake system of the vehicle to an electromechanical braking system when the parking release condition is met, and generating, by the electromechanical braking system according to the initial parking torque, a clamping torque of the same magnitude as the initial parking torque: sending the initial parking torque from the electric parking brake system of the vehicle to the electromechanical braking system when the parking release condition is met, causing the electromechanical braking system to generate the clamping torque of the same magnitude as generates the original parking torque and controls an electromagnetic brake in the electric parking brake system to release it.
8. Brake control device for starting a vehicle, characterized in that the brake control device for starting a vehicle is configured to implement the brake control method for starting a vehicle according to one of the Claims 1 until 7 to perform, and includes: a sensing module configured to detect a real-time accelerator pedal position of a vehicle when the vehicle is in a parked state and to determine whether the real-time accelerator pedal position meets a parking release condition; a torque switching module configured to send an initial parking torque from the vehicle's electric parking brake system to an electromechanical braking system when the parking release condition is met, so that the electromechanical braking system generates a clamping torque of the same magnitude as the initial parking torque; and a torque release module configured to obtain a real-time drive torque according to the real-time accelerator pedal position and to control the clamping torque so that it decreases with an increase in the real-time drive torque.
9. A storage medium comprising computer-executable instructions, characterized in that the computer-executable instructions, when executed by a computer processor, are configured to control the brake control procedure for starting a vehicle according to one of the Claims 1 until 7 to carry out.
10. Vehicle characterized in that the vehicle has a brake control device for starting a vehicle after Claim 8 includes.

Description

TECHNICAL AREA Embodiments of the present invention relate to the technical field of motor vehicle braking and in particular to a brake control method and a brake control device for starting a vehicle, a storage medium and a vehicle. TECHNICAL BACKGROUND In recent years, electric parking brake (EPB) systems have been increasingly used in vehicle types with medium and high equipment levels, which is useful for relieving the driver of tasks and ensuring the vehicle's parking safety. In the prior art, the control process for the automatic release of the EPB parking brake caliper consists of the EPB being automatically released only when the vehicle's accelerator pedal is depressed and the driving force generated by the accelerator pedal is greater than the sum of all roll-back torques, thus eliminating the parking torque. Therefore, when the vehicle needs to be switched from a parked to a driving state, the driver can depress the accelerator pedal to control the EPB parking torque so that it is automatically released, thereby initiating the vehicle's acceleration. However, in the aforementioned vehicle acceleration process, the automatic release of the EPB parking brake caliper and the elimination of the parking torque are delayed, and if the driver depresses the accelerator pedal too much or too quickly, jerking or deceleration of the entire vehicle will occur, impairing the vehicle's driving comfort. SUMMARY OF THE INVENTION The present invention provides a brake control method and a brake control device for starting a vehicle, a storage medium and a vehicle to reduce jerking and deceleration problems during the vehicle starting process and to improve the driving comfort of the vehicle. In a first aspect, one embodiment of the present invention provides a brake control method for starting a vehicle, comprising: Capturing a real-time accelerator pedal opening or pedal position of a vehicle when the vehicle is in a parked state, and determining whether the real-time accelerator pedal opening or pedal position satisfies a parking release condition; Sending an initial parking torque from the vehicle's electric parking brake system to an electromechanical braking system when the parking release condition is met, and generating, by the electromechanical braking system according to the initial parking torque, a clamping torque of the same magnitude as the initial parking torque; and Obtaining a real-time drive torque according to the real-time accelerator pedal opening or pedal position and controlling the clamping torque so that it decreases with an increase in the real-time drive torque. Furthermore, the procedure also includes: Determine whether the release of the original parking torque according to the clamping torque is complete. Furthermore, determining whether the release of the original parking torque according to the clamping torque is complete includes: If the clamping torque is less than a preset threshold, determine that the release of the original parking torque is complete; or If the clamping torque is greater than or equal to the preset threshold, determine that the release of the original parking torque is not complete, and continue controlling according to the real-time drive torque of the clamping torque generated by the electromechanical braking system, so that it decreases synchronously until the clamping torque is less than the preset threshold. Furthermore, after determining that the release of the original parking torque is complete, the procedure also includes: Controlling the vehicle so that it starts moving according to the drive torque corresponding to the accelerator pedal opening or pedal position of the vehicle at that time. Furthermore, controlling the clamping torque includes ensuring that it decreases with an increase in the real-time drive torque: Causing the clamping torque generated by the electromechanical braking system to decrease with an increase in the real-time drive torque, where the clamping torque and the real-time drive torque satisfy: Vdrive+Vclamp=Voriginal; where V drive is the real-time drive torque, V clamp is the clamping torque, and V original is the original parking torque. Furthermore, determining whether the real-time accelerator pedal opening or pedal position satisfies a parking release condition includes: If the real-time accelerator pedal opening or position is greater than a preset opening, determine that the parking release condition is met; or If the real-time accelerator pedal opening or position is less than or equal to the preset opening, determine that the parking release condition is not met. Furthermore, the sending of an original parking torque from an electric parking brake system of the vehicle to an electromechanical braking system, when the parking release condition is met, and the generation, by the electromechanical braking system according to the original parking torque, of a clamping torque of the same magnitude as the original parking t