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The car must not only run fast, but also brake.
Release Time:
2021-09-15
The quality of a car is not determined by how fast the car can run, but by how fast the car can stop, so the part of the car that stops the car must be the car's brakes (also called the brakes). Brake), the full name of the brake system (also called the brake system), the brake system is divided into disc brakes (also called disc brakes) and drum brakes (braking) two ways. Generally, small vehicles with 7 seats or less use disc brakes, and large vehicles (buses, large trucks) use drum brakes.
The quality of a car is not determined by how fast the car can run, but by how fast the car can stop, so the part of the car that stops the car must be the car's brakes (also called the brakes). Brake), the full name of the brake system (also called the brake system), the brake system is divided into disc brakes (also called disc brakes) and drum brakes (braking) two ways. Generally, small vehicles with 7 seats or less use disc brakes, and large vehicles (buses, large trucks) use drum brakes.
What is a disc brake?
Disc brakes, as the name suggests, are stationary brake calipers (brake pads are installed under the calipers), and the brake discs coaxial with the wheels generate friction to decelerate the wheels until they stop. The brake calipers of disc brakes are typical of static braking. There are brake pistons on both sides of the calipers, generally 4-piston calipers. Some supercars or high-end models have six-piston calipers. Such calipers, brake pads and brake discs will increase accordingly. large to improve braking efficiency.
What are the pros and cons of disc brakes?
The advantages of disc brakes are:
1. The structure is relatively simple, consisting of brake piston, brake caliper, brake pad, and brake disc, which is easy to maintain.
2. High heat dissipation performance, high-frequency braking is not easy to produce thermal attenuation, and it is not easy to cause brake recession and lead to brake failure.
3. The environment has little influence on the braking, and the rainy weather has little influence on the braking system, which can be ignored. But tire slip is not controlled by the brake system.
The disadvantages of disc brakes are:
1. There is no automatic braking effect, and the braking force is required to be larger, or the hydraulic piston device with greater force is required to complete the braking.
2. The friction area between the brake pad and the brake disc of the disc brake is small, so that the braking force is relatively small (mostly used for small vehicles with small mass)
3. It is not easy to install the handbrake device, and a set of drum brake handbrake mechanism needs to be added.
4. The wear of the brake pads is large, resulting in a higher replacement frequency.
How to maintain it?
1. Check the brake fluid level. If the fluid level is too low, replenish the brake fluid in time and check the purity of the brake fluid. Dirty brake fluid will greatly reduce the braking effect.
2. Check the brake pads. The brake pads are easy to wear parts. Generally, the thickness of the brake pads should be checked frequently when the car runs 30,000 kilometers, and the replacement can be considered after 60,000 kilometers.
What is a drum brake?
Two semi-circular brake pads are installed in the wheel hub, and the "lever principle" is used to push the brake pads to make the brake pads contact with the inner surface of the drum to generate friction. Simply put, the drum brake is a brake device that uses the stationary brake pads in the brake drum to rub the brake drum that rotates with the wheel to generate friction to reduce or stop the rotation speed of the wheel.
What are the advantages and disadvantages of drum brakes?
The advantages of drum brakes are:
1. With automatic braking effect, the brake system can use lower oil pressure, or use a brake drum with a much smaller diameter than the brake disc.
2. For vehicles with drum brakes, it is easy to install the handbrake device.
The disadvantages of drum brakes are:
1. It is easy to produce thermal attenuation, and it cannot continuously brake at high frequency, which is easy to cause brake failure.
2. The brake system has a slow response, and the brake pedal strength is not easy to control, which is not conducive to high-frequency braking action.
3. The structure is more complicated, and it is not easy to maintain.
4. It is greatly affected by the environment. In rainy days, the water in the drum brake will cause brake recession or failure.
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