Method, device and system for electronic parking brake

Abstract

The invention discloses an electronic parking brake method, device and system. The method comprises the steps that a road gradient of a current location of a vehicle is determined according to a longitudinal acceleration signal of the vehicle; the situation that the vehicle is located on a ramp is determined, suspension height target commands of four wheels are determined according to the road gradient and the suspension height target commands are sent to a semi-active suspension controller; a parking brake controller determines the target parking clamping force according to the road gradientand controls a brake caliper output; and meanwhile, the semi-active suspension controller adjusts the suspension height of the four wheels of the vehicle to the corresponding target suspension heightaccording to the suspension height target commands, and the suspension height adjustment completion information is sent to the parking brake controller. Compared with the conventional scheme, the gradient electronic parking brake method based on the semi-active suspension reduces the capacity requirements of the clamping force of the electronic parking brake system at the same gradient and at thesame brake disc temperature so that it can be ensured that the vehicle does not slip in worse conditions.

Description

technical field [0001] The present invention relates to the technical field of electronic parking, more specifically, to an electronic parking brake method, device and system. Background technique [0002] The existing electronic parking brake system, when performing parking brake on a slope, will increase the clamping force as the slope increases. However, when the slope is steep, the required clamping force may exceed the clamping capacity of the electronic parking brake system, especially when the temperature of the brake disc is high, because the friction system of the brake disc decreases, making the same The braking torque generated by the clamping force is significantly reduced, thereby endangering the use safety of the car and the public safety outside the car. [0003] Therefore, how to provide an electronic parking brake method to reduce the clamping force capability requirements of the electronic parking brake system under the same slope and the same brake disc t...

AI Technical Summary

Problems solved by technology

However, when the slope is steep, the required clamping force may exceed the clamping capacity of the electronic parking brake system, especially when the temperature of the brake disc is high, because the friction system of the brake disc decreases, making the same The braking torque generated by the clamping force is significantly reduced, which endangers the safety of the car and the public safety outside the car

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