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The quality of a car does not depend on how fast the car can run, but on how fast the car can stop. The car part that makes the car stop is none other than the car's brakes (also known as the car's brakes). Braking), the full name is braking system (also called braking system). The braking system is divided into two braking (braking) methods: disc brake (also called disc brake) and drum brake. 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?
As the name suggests, disc brakes are static brake calipers (brake pads are installed under the calipers), which generate friction with the coaxial brake discs of the wheels to slow down the wheels until they stop. Disc brake calipers are typical of static braking. There are brake pistons on both sides of the caliper. They are usually 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.

The advantages of disc brakes are:
1. The structure is relatively simple, consisting of brake piston, brake caliper, brake pad and brake disc, and is easy to maintain.

2. The heat dissipation performance is high. High-frequency braking is not easy to produce thermal attenuation, and it is not easy to cause brake failure and brake failure.

3. The environment has little impact on braking, and the impact on the braking system in rainy days is small and can be ignored. But tire slip is not controlled by the braking system.

Disadvantages of disc brakes are:
1. There is no automatic braking function, which requires greater braking force or a more powerful hydraulic piston device to complete the braking.

2. The friction area between the brake pads and the brake disc of the disc brake is small, so the braking force is also relatively small (mostly used for small vehicles with low mass)

3. It is difficult to install a handbrake device, and a set of drum brake handbrake mechanisms are required.

4. The brake pads wear out a lot, so the frequency of replacement may be higher.

How to maintain it?
1. Check the brake fluid level. If the fluid level is too low, replenish the brake fluid in time. Check the purity of the brake fluid. Brake fluid that is too dirty will greatly reduce the braking effect.

2. Check the brake pads. 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 replacement can be considered after 60,000 kilometers.

What is drum brake?
Two semicircular brake pads are installed inside the wheel hub, and the "leverage principle" is used to push the brake pads so that the brake pads come into contact with the inner surface of the wheel drum to cause friction. Simply put, a drum brake is a braking device that uses stationary brake pads in the brake drum to rub the brake drum that rotates with the wheel to generate friction to slow down or stop the wheel rotation.

What are the advantages and disadvantages of drum brakes?
The advantages of drum brakes are:
1. It has automatic braking function. The braking system can use lower oil pressure or use a brake drum with a diameter much smaller than the brake disc.

2. For vehicles with drum brakes, it is easy to install a handbrake device.

The disadvantages of drum brakes are:
1. It is easy to produce thermal attenuation and cannot brake at high frequency continuously, which may easily cause brake failure.

2. The brake system responds slowly and the brake pedal force is difficult to control, which is not conducive to high-frequency braking actions.

3. The structure is complex and difficult to maintain.

4. It is greatly affected by the environment. Water entering the drum brake on rainy days will cause brake failure or failure.

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