1. Detailed car’s brake system
turns the wheels of the car because it can travel on the road, when the car to stop, how to do it? The driver is not like a cartoon like Stick ’em to the ground to stop the car forward, this time you have to rely on the car’s brakes to reduce the speed of the car and stopped.
by the friction generated between the brake pad and the disk or drum, and the kinetic energy into the cars when in the process of friction into heat energy consumed. Brake means has common “drum brake” and “brake disc” The two types, their basic features are as follows:
First, the drum brake
In wheel hub which is mounted two semicircular brake pads, using “the principle of leverage” brake pads push brake pads and the inner contact surface of the friction drum.
works
drum brakes in the automotive above has been nearly a century of history, but because of its reliability, and a powerful braking force, so that the drum brake today still configured (multi-use in rear) on many models. By means of a hydraulic drum brake is the brake pad means to push it inside the brake drum, brake pad and the inner surface of the wheel with the rotating brake drum of the friction occurs, the braking effect is generated.
The inner surface of the drum brake is the brake drum brake device generating position of the braking torque. In the case of obtaining the same braking torque, the brake drum diameter drum brake device may be a brake disc brakes smaller than many. So large vehicle truck used to obtain a powerful braking force, the device can only drum brakes in the limited space of the rim.
Briefly, the brake pad drum brake is the use of the stationary drum brakes, friction brake drum to rotate with the wheel, a frictional force to brake the wheel rotational speed reduction.
Drum Brakes advantages
1, Tight automatic brake action, so that the braking system may use a low hydraulic pressure or brake disc having a diameter smaller than a lot of the brake drum;
2, easy to install handbrake mechanism. Some parking brake mechanism rear disc brake device of the vehicle, the brakes installed in the center portion of the drum brake;
3, parts of the process and composition of relatively simple, but have relatively low manufacturing costs.
Drum Brakes disadvantages
1, the brake drum brake drum diameter increases when heated, causing increased stroke of the brake pedal, easy brake reactions occur as expected. Thus using the vehicle driving drum brake, causing the brake to avoid continuous brake pads due to high temperature thermal fading phenomenon;
2, the reaction slowly brake system, the braking force of the pedaling more difficult to control, not do braking action facilitates a high frequency;
3, a multi-part structure is complicated, brake clearance adjustment to be done, so that maintenance is not easy.
Second, the brake disc
In the brake caliper brakes to control the two clamping the brake disc on the wheel. When the disk brake pad sandwiched between both of which cause friction.
When the car on a low friction road surface slippery or icy, if excessively brake occurs, the wheel brake means is locked and lose traction, resulting in loss of the ability to control the direction of the vehicle. In order to make such a dangerous vehicle on the road surface can effectively control the forward direction, then developed ABS “anti-lock braking system.”
increasing performance of ABS “anti-lock brake system”, in occasion of its capability also allows TCS (Traction Control System) “Traction Control” and VSC (Vehicle Stability Control) “vehicle stability control system “