Method, device and system for electronic parking brake

Abstract

The invention discloses an electronic parking brake method, device and system. The method includes: when a parking clamping command is received and a low-voltage failure of the power supply is determined, the parking clamping function is suspended, and when the parking brake When the input voltage of the controller does not recover from the low-voltage state to the normal working voltage state, it outputs a prompt message to prompt the driver to step on the brake pedal hard, and after detecting that the brake pedal is hard pressed, it outputs the first preset The current is used to drive the motor to continue to perform the parking clamping function. When it is detected that the caliper is clamped to the previous clamping position, the drive solenoid locks the lock pin, stops driving the motor, and outputs to prompt the driver to stop stepping on the brake. Pedal hints. In the present invention, when the power supply of the parking brake controller has a low-voltage failure, it relies on manpower to perform parking braking. During the parking braking period, the motor and solenoid continue to perform parking braking, and the lock pin is locked to ensure The caliper is locked to realize the electronic parking brake in the low pressure state.

Description

technical field [0001] The present invention relates to the technical field of automobile braking, and more specifically relates to an electronic parking braking method, device and system. Background technique [0002] Electronic parking brake system (Electrical Park Brake, EPB) refers to a system that integrates temporary braking during driving and long-term braking after parking, and realizes parking braking by electronic control. [0003] In the existing electronic parking brake system, the parking brake under the low voltage state is generally suspended for a certain period of time (usually within 2 seconds), and then the parking brake is performed after the voltage returns to the normal state from the low voltage state. . If within this time period, the voltage does not recover from the low voltage state to the normal state, the electronic parking brake system will give an alarm and stop working. [0004] Therefore, when the voltage does not recover from a low voltage...

AI Technical Summary

Problems solved by technology

[0004] Therefore, when the voltage does not recover from a low voltage state to a normal state within a certain period of time, the electronic parking brake system will not be able to perform the parking brake function

At this time, it is also impossible to manually perform the parking brake, which will easily cause the car to slip, and even threaten the personal safety inside and outside the car.

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