Braking is the most important thing for vehicle driving safety. Even if the vehicle has other system faults, if the brake is effective, the driver can stop the vehicle to avoid collision, collision with people and wall. In the process of using, installing, replacing and maintaining the brake, if you don't pay attention to it a little, it will bury hidden dangers for causing great disaster. The following is a summary of the basic composition of the brake system and the daily maintenance of the brake.
First, the main composition of the brake system
A. main brake system
When a car is running, the brakes are usually operated by feet, so they are also called foot brakes. After the driver depresses the brake pedal, the braking force is transmitted to the braking device of the wheel by mechanical or hydraulic pressure to generate friction.
B. parking brake system
Parking brake, also called hand brake, is a braking device to prevent the vehicle from sliding when parked. Generally, there are two types of braking: the intermediate braking type installed on the transmission shaft and the braking type directly controlling the rear wheel.
C. brake master cylinder and brake slave cylinder
The main mating part of the hydraulic brake is provided with a tank for storing brake oil and a piston in the cylinder below. The piston is acted on by the brake pedal in the cylinder through the push rod to transmit the brake oil pressure in the cylinder to each wheel cylinder. It is also a hydraulic brake device and a brake cylinder arranged in each wheel.
D. power brake
Brakes that supplement the braking force by using engine vacuum and oil pressure to operate Booster, etc.
E. brake pads
The brake pad is equivalent to the brake rubber on a bicycle, and its thickness will be consumed after the brake is used for a long time. Brake pads of different models are different in shape, size, thickness and order of placement. Only the correct model can be placed on the brake caliper assembly. If it is too large to fit, it will affect the braking performance.
F. brake shoe
The brake cam or push rod pushes the brake drum outward to press the brake drum, and the brake fitting is shaped like a half moon.
G. brake fluid
As we all know, air can be compressed, while solids become soft at high temperatures. Therefore, during braking, special liquid is selected to transfer the medium during braking. Brake fluid is such a special liquid.
Brake fluid has high temperature resistance and boiling point, and will not deteriorate, boil or generate steam at a certain high temperature. However, the quality of brake fluid will change with the passage of time, so the brake fluid should be changed at the manufacturer's fixed time or mileage. It's not that it can't be used, it's just that the braking effect will not be so good in extreme cases, it's just a kind of safety precaution.
II. Daily Maintenance of Brakes
Brake maintenance is mainly to prevent the brake disc from being grooved, brake pads from being abnormally worn, and to suppress noise, etc. Many user manuals for maintenance intervals are not specified. It is suggested that friends who maintain in 4s store should do it once every 2km for the joint-stock car and 1km for the autonomous car of average quality. If you can't find a reliable repair shop friend for maintenance in store 4s, you'd better focus on inspection. Special grease is required for the brake cylinder pin. Ordinary butter is used in many places, which is not standard. Ordinary butter cannot withstand the high temperature of the brake and may deteriorate, causing the cylinder pin to jam, thus causing the brake block to wear out.
