Working Principle of Brakes (2)-Jiaozuo Jianghe Brake Co., Ltd

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Working Principle of Brakes (2)

Release time:

2022-11-03 11:00

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Keywords: brake, electric hydraulic block brake

There are significant differences in practical applications, with disc brakes being better than drum brakes. Drum brake and disc brake have their own advantages and disadvantages. In terms of braking effect, the difference between disc brake and drum brake is not significant, because during braking, kinetic energy is converted into thermal energy through braking. If the car body is compact and lightweight, drum brakes on the rear wheels are sufficient.

In terms of heat dissipation, disc brakes dissipate heat faster than drum brakes, and ventilated disc brakes have better heat dissipation effects; In terms of sensitivity, the disc brake will be higher, but in rainy days when the road is muddy, the braking effect will be greatly reduced when the brake drum adheres to mud, which is also the disadvantage of the disc brake; In terms of cost, drum brakes are lower than disc brakes and have a longer service life. Therefore, some mid to low end vehicles often use drum brakes, while models above mid to high end use four wheel disc brakes.

From an economic and practical perspective, car designers generally adopt a hybrid form of front wheel disc braking and rear wheel drum braking for sedans. During the braking process of a four-wheel sedan, due to the effect of inertia, the load on the front wheels usually accounts for 70-80% of the total load of the car, so the load on the front wheels is greater than that on the rear wheels. Car manufacturers use front wheel disc braking and rear wheel drum braking to save costs. For mid to high rise sedans with four-wheel disc brakes, the use of ventilated disc brakes on the front wheels is for better heat dissipation, and the use of non ventilated disc brakes on the rear wheels is also a cost factor. After all, the manufacturing process of the ventilation disc type is much more complex, and the price is relatively expensive. With the development of materials science and the reduction of costs, disc brakes are gradually replacing drum brakes in the field of sedans.

Generally, brakes apply braking torque to rotating components through their fixed components, reducing the rotational angular velocity of the latter. At the same time, they rely on the adhesion between the wheels and the ground to generate braking force on the road surface to slow down the car. Any brake that generates braking torque through the friction between fixed components and the working surface of rotating components is called a friction brake. The friction brakes used in automobiles can be divided into two categories: drum type and disc type.

The brake system is called a wheel brake, where the rotating components are fixed on the wheel or half axle, and the braking torque directly acts on both sides of the wheel. The rotating component is fixed on the transmission shaft of the transmission system, and its braking torque is distributed to the brakes on both sides of the wheels through the drive axle, which is called the central brake.

Working Principle of Brakes (1)

Introduction to the braking system