Electronic parking braking method, device and system

Abstract

The invention discloses an electronic parking braking method, device and system. The method comprises the following steps: suspending a parking clamping function when a parking clamping instruction isreceived and it is determined that a power supply has a low-voltage fault; outputting prompt information for prompting a driver to step on a brake pedal when an input voltage of a parking brake controller is not recovered to a normal working voltage state from a low-voltage state; outputting a first preset current to drive a motor to continue to execute the parking clamping function after it is detected that the brake pedal is treaded down forcibly; when it is detected that a caliper clamps to the previous clamping position, driving a solenoid to lock a lock pin, stop driving the motor, and outputting prompt information for prompting the driver to stop stepping on the brake pedal. When the power supply of the parking brake controller has the low-voltage fault, parking brake is carried outby manpower; parking brake is continuously carried out through the motor and the solenoid during parking brake, locking of the caliper is ensured by locking the lock pin, and electronic parking brakein the low-voltage state is realized.

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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