Structure and method for reducing dragging torque of vehicle brake calipers

Abstract

The invention provides a structure and method for reducing the dragging torque of vehicle brake calipers. The structure comprises an ECU, a transmission mechanism, an auxiliary main cylinder, an auxiliary main cylinder piston, the calipers, a caliper piston and a seal ring. When it is judged through the ECU that a driver releases a brake pedal, the auxiliary main cylinder piston retreats to the original point, an electromagnetic valve is switched off, and the auxiliary main cylinder piston continues to retreat, certain negative pressure is formed in the auxiliary main cylinder, the caliper piston further retreats with the aid of atmospheric pressure, the friction between a friction plate and a brake disc is reduced or eliminated, and therefore the dragging torque of the brake calipers is reduced or eliminated.

Description

technical field [0001] The invention relates to the field of vehicle braking, in particular to a structure and method for reducing drag torque of an automobile brake caliper. Background technique [0002] At present, in the field of vehicle braking, calipers are used to brake the wheels, and in order to ensure the sealing of the calipers, sealing rings are installed on the pistons of the calipers. The ring is closely attached to the inner wall of the caliper, and a drag moment will be generated after returning to the position, resulting in a certain amount of loading between the brake disc and the friction plate, which affects the service life of the brake. The drag torque of traditional automobile brake calipers is difficult to reduce or eliminate. In the existing WCBS configuration, there is a one-way valve between the sub-master cylinder and the liquid storage tank. The pressure difference between the two sides is about 0.3bar, for a diameter of 57mm The cylinder diamete...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of vehicle braking, calipers are used to brake the wheels, and in order to ensure the sealing of the calipers, sealing rings are installed on the pistons of the calipers. The ring fits closely with the inner wall of the caliper, and a drag moment will be generated after returning to the position, resulting in a certain load between the brake disc and the friction plate, which affects the service life of the brake

The drag torque of traditional automobile brake calipers is difficult to reduce or eliminate. In the existing WCBS configuration, there is a one-way valve between the sub-master cylinder and the liquid storage tank. The pressure difference between the two sides is about 0.3bar, for a diameter of 57mm The cylinder diameter, the resistance is about 200-300N, and the negative pressure of 0.3bar cannot push

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