When braking, the driver steps on the brake pedal, the pedal force is transmitted to the push rod through the transmission mechanism, and pushes the rear cylinder piston to move forward. After the leather cup covers the bypass hole, the pressure in the rear chamber increases. Under the action of the hydraulic pressure in the rear chamber and the spring force of the rear cylinder, the piston 7 of the front cylinder moves forward, and the pressure in the front chamber also increases. When the brake pedal continues to be pressed down, the hydraulic pressure in the front and rear chambers continues to increase, making the front and rear brakes brake.
When the brake is released, the driver releases the brake pedal. Under the action of the front and rear piston springs, the piston and push rod in the brake master cylinder return to the initial position, and the oil in the pipeline pushes open the oil return valve and flows back to the brake system. The master cylinder is activated, so that the braking effect disappears.