What is the principle of automobile braking system

1. The principle of automobile braking system is to use the mutual friction between the non-rotating elements attached to the body (or frame) and the rotating elements attached to the wheels (or drive shafts) to stop the wheels from rotating or tend to rotate. Moreover, the kinetic energy of a moving vehicle is converted into heat energy and dissipated into the atmosphere.

2. The wheel brake is mainly composed of a rotating part, a fixed part and an opening mechanism. The rotating part is the brake drum, which is fixed on the wheel hub and rotates with the wheel, and its working surface is the inner cylindrical surface. The fixed part mainly includes the brake tile and the brake base plate. The brake base plate is bolted to the steering knuckle flange (front wheel) or axle housing flange (rear wheel). On the fixed brake base plate, two support pins support the lower ends of two curved brake shoes. The brake shoes are provided with friction pads on the periphery and the upper end is tensioned against the wheel cylinder piston by a brake shoe return spring. The brake shoes may be opened by an opening mechanism such as a cam or a brake wheel cylinder. The brake wheel cylinder is also mounted on the brake base plate. The hydraulic brake transmission mechanism consists mainly of a brake pedal and a push rod! master cylinder, brake wheel cylinder and fuel line, etc. The brake master cylinder mounted on the body is connected to the brake wheel cylinder through the oil pipe, and the driver can manipulate the piston of the brake master cylinder through the brake pedal.

3. Automobile braking systems are now generally divided into two types. One is hydraulic braking; the other is pneumatic braking. Hydraulic by the brake fluid as the transmission medium of the brake master cylinder through the brake pipeline to each brake cylinder, to achieve the braking effect; pneumatic braking is the use of high-pressure gas as a braking medium, and then through the pipeline to each brake cylinder, to achieve the effect of braking.

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