Brake drum and disc is in general use on the wheel of a car, a tension brake, a by clamp force brake, air brake and oil brake, and oil and gas mixing brake, a is when the driver foot on brake pedal, a pedal driven piston, the piston pushes the brake oil to produce thrust, thrust to push the piston, the piston pushes the brake shoes, brake shoe clamping or up dead brake disc, thereby driving a vehicle will be stopped. Another is the driver foot brake pedal, a pedal driven brake general pump inlet valve so that the compressed air into the pump, power generating system.
Automobile brake principle according to the transmission way I have seen the main 3 kinds of auxiliary one. According to the braking way I have seen the main 2 kinds of auxiliary
In terms of transmission
A is a mechanical linkage transmission drum parking brake the brake due to the transmission mode of operation is very flexible so only in many of the older cars appear to fit in between the gearbox and the transmission shaft. Hold the drive shaft let the transmission shaft does not rotate main reducer not revolution of the planetary gear differential also not rotation axle also not rotation so as to realize the parking automatically. This is old brake now almost no
The second is heavy vehicle braking mode is almost all heavy vehicles (including cars, trains and other heavy equipment) through installed on the engine pump air into the air storage tank (usually pressure for the) and gas tank will have received tracheal brake pedal brake total pump (pump) stepped on the brake brake total pump valve will open the compressed air can be through the pipeline into the brake cylinder
1 (drum brake) brake branch pump in inlet does not leak (leak was ill) as long as there is pressure brake piston pump will be pushed forward to push the brake adjusting arm (a lot of places to call on the fly) brake adjustment arm like cam as a slight rotation driven by a cam shaft rotation to allow the cam to rotate, so that the brake shoes on both sides to separate by the friction between the brake shoes and brake drum hold brake drum of the brake system drawback is easy to lock
2 disc brake, brake total pump over pressure will flow into the brake pump brake branch pump pressure will be installed on the pump (is commonly referred to as the brake caliper) of the brake shoe pushed forward by friction of the brake shoe and brake disc (disc) between the reduction speed faults of power in a small brake Force II if brake disc steel lack of fire or materials containing high amount of carbon brake disc rupture (a consequence is drag no law can only drag the body top hired ferry pessary)
The third is the car with the most is through an oil pressure braking principle and pneumatic system similar. Just have to exhaust air or the brake didn't effect. Namely: cup, brake total pump, ABS, brake branch pump brake pad and the brake drum / brake disc friction brake. "- >" on behalf of the connecting pipe
In terms of braking mode
First drum brake principle through pump pushes the adjustable arm to drive a cam shaft through the cam shaft rotates and pushes two brake shoes to brake the brake shoe and brake drum friction brake
The principle of the second kinds of disc brake is to push the piston in the sub pump to push the brake shoe through the friction between the brake shoe and the brake disc.
The other what kind of auxiliary braking the electric eddy current retarder commonly known as electric brake by installed in the brake pedal and the braking gas road potentiometer or pressure sensor control host to host computer using relay control box of eddy current retarder of the slow speed coil with high currents, generated with the drive shaft movement direction opposite magnetic force and the transmission system is the direction of movement of the match to realize deceleration.