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Do you know your brakes?What you need to know about brakes

Blog 2年前 (2022-04-10) 298 Views

Do you know your brakes?What you need to know about brakes

The wheels are the only parts of the car that touch the ground, and the sole purpose of the brakes is to stop the wheels from turning, and is directly related to safety.

Next, the brakes will be interpreted in turn from the type of brakes, the material of the brake disc, and the structure of the brake system.

Type of brake

Do you know your brakes?What you need to know about brakes

There are two kinds of brake structures, drum brake and disc brake, which are mainly used for small passenger cars on the market. The production cost has gradually become synonymous with low-end, but it has also appeared in models with low prices, such as Nissan's Tuda.

Do you know your brakes?What you need to know about brakes

The drum brake relies on the piston in the brake drum to push the brake pads, so that the brake pads and the surrounding brake drums produce frictional resistance. The braking performance of drum brakes is relatively good, but the biggest shortcoming is poor heat dissipation and thermal decay of continuous braking.

Do you know your brakes?What you need to know about brakes

Compared with drum brakes, disc brakes are almost a "perfect choice", with good ventilation, good drainage, and simple structure. The covered models are the reason for the small passenger car.

Do you know your brakes?What you need to know about brakes

Careful fans will find that common disc brakes also have different textures and materials. Disc brakes mainly include smooth, scribed discs and perforated discs. Punching and scribing discs with several textures.

Do you know your brakes?What you need to know about brakes

Among them, the high temperature resistance of the optical disc is poor, the scribing disc can effectively remove the impurities between the brake pads and the brake disc, the punching disc can accelerate the air flow to take away the heat, and the punching and scribing disc combines the advantages of punching and scribing .

But it does not mean perfection. During the development stage of the Porsche Cayenne, Porsche tested the perforated brake disc and found that the perforated brake disc would collect debris, causing the brake disc to wear out too quickly, and even damage the brake. system possibility.

Brake disc material

Do you know your brakes?What you need to know about brakes

There are three main types of brake materials in use, metal-based brake discs, carbon-carbon brake discs and carbon-ceramic brake discs.

The vast majority of civilian cars use metal-based brake discs, and a small number of high-performance cars use expensive carbon-ceramic brake discs. Carbon carbon brake disc is a special material synthesized by carbon lattice and carbon fiber, which is used in F1 racing cars.

Carbon-ceramic brake discs have almost become one of the must-have symbols for high-performance vehicles, and are used in high-speed trains, airplanes and other fields that require high-performance brakes, but this does not mean that the only choice for the best braking is carbon-ceramic brakes .

Do you know your brakes?What you need to know about brakes

Careful fans will once again find that carbon-ceramic brake discs do not appear on racing cars in top events such as GT3 and WRC. We can believe that this is not the cost that limits the use of carbon-ceramic brake discs. First of all, although carbon-ceramic brakes have extremely high temperature resistance, it does not mean that the brake parts do not need heat dissipation. If the local temperature continues to rise, it will affect the entire vehicle. In normal operation, even the carbon-carbon material used in F1 does not have good heat dissipation capacity, but F1 has a separate air duct to cool the brakes, and the good thermal conductivity of metal brake discs has become the first choice for GT3 and other racing cars.

Do you know your brakes?What you need to know about brakes

At the same time, although the carbon ceramic brake disc can be almost used for scrapping the vehicle, there is still a chance of it being broken. Move, the consequences are unimaginable.

brake structure

Do you know your brakes?What you need to know about brakes

The braking system is divided into a driving part and a parking part. The driving part consists of a brake pedal, a vacuum booster, a brake pressure sensor, a master cylinder, a brake pipe, a brake and other parts. lock, and rear brake.

Do you know your brakes?What you need to know about brakes

Do you know your brakes?What you need to know about brakes

When the brake pedal is stepped on, the brake fluid in the brake master cylinder is driven to generate pressure, and the piston cylinder in the brake is pushed, so that the brake pads are clamped to generate braking force.