EPB gap adjustment method, system and vehicle with motor self-adaptive function

Abstract

The invention discloses an EPB gap adjustment method, system and automobile with motor self-adaptive function, wherein the EPB gap adjustment method with motor self-adaptive function at least includes the following steps: when the system obtains an instruction requiring EPB gap adjustment, turn on the motor , perform a braking action; obtain the current and voltage signals of the motor in real time; calculate the real-time speed of the motor according to the obtained current and voltage signals; determine the stop braking condition according to the real-time speed and current of the motor, and the stop braking condition includes at least the first stop The braking condition and the second stopping braking condition, when the first stopping braking condition and the second stopping braking condition are met at the same time, control the motor to drive the stopping braking and start the release action. Compared with the existing method, this solution has more flexibility, can adapt to the needs of different environments, and simultaneously simplifies the research and development process and cost of the EPB system.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to an EPB gap adjustment method, system and automobile with motor self-adaptive function. Background technique [0002] At present, the electronic parking system (EPB for short) is generally used in vehicles to complete the parking brake of the vehicle. During the life cycle of the vehicle, the friction plate will continue to wear out with the increase in the number of braking. Failure to perform a parking maneuver will result in prolonged braking times, which can lead to safety concerns. Therefore, the EPB system needs to have the function of automatic gap adjustment, so that the distance between the friction plate and the brake disc is always kept at an appropriate distance. [0003] The current technology mainly determines the state of the motor by calibrating the target current. First, it is necessary to measure the target current for the motor to drive and stop braking...

AI Technical Summary

Problems solved by technology

[0005] This method determines the motion law and position state of the motor through the current, voltage and real-time speed of the motor, so as to control the positional relationship between the friction plate and the brake disc through the motor to ensure the automatic adjustment of the gap between the friction plate and the brake disc. , this method needs to measure and calculate the target current of the motor in the process of motor drive braking and release, and then determine the state of the motor through real-time detection. However, the determination of the target current needs to be completed through multiple tests, the calibration process is complicated, and the test cost At the same time, the target current of different types of motors is different, and it often takes a lot of time and energy to test one by one. In addition, especially in the braking state of the car, the road conditions, braking time, and braking mode of the vehicle are different. Objective factors such as differences will also have a certain impact on the target current. A single target current cannot adapt to the requirements of the motor in different states, which is prone to errors and affects the braking effect of the car.

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