What is the rear brake disc of a car
Automotive rear brake disc refers to a part of the brake system installed on the rear wheels of an automobile and used to provide braking force to the rear wheels. It's a round, disk-like object that rotates with the car. When the driver presses the brake pedal, the brake system will clamp the rear wheel brake disc through the brake caliper to produce braking force, so as to realize the control of the rear wheel and make the car slow down or stop .
Structure and function of rear brake disc
The rear brake disc mainly consists of a disc-like metal component, usually made of a high-strength alloy material. Its main function is to generate braking force by clamping the brake disc with brake calipers to achieve vehicle deceleration or parking. In order to ensure driving safety, the rear brake disc needs to have good wear resistance, high temperature resistance and stability .
Maintenance and replacement of rear brake disc
Maintenance of the rear brake disc mainly includes regular inspection of its wear level. When the vehicle mileage reaches 100,000 kilometers, it is recommended to check the condition of the brake disc. If the brake disc clearance exceeds 3 mm or has obvious wear, it should be replaced in time.
The replacement steps include:
Check brake disc wear.
Remove the front tire.
Remove the screw that holds the brake caliper in place and remove the brake caliper.
Remove the old brake disc, which may need to be removed by tapping the rear of the brake disc.
Install new brake discs and ensure they are securely attached to the bearing.
Install the brake caliper to its original position and tighten the set screws.
After the installation is complete, check for abnormal noise .
The main role of the rear brake disc is to generate braking force through friction to help the vehicle slow down or stop . When the driver presses the brake pedal, the brake system will clamp the rear wheel brake disc through the brake caliper, generating braking force, thereby slowing down or stopping the car .
Working principle
Through friction with the brake disc, the kinetic energy of the vehicle is converted into heat energy, thus achieving deceleration and stopping. The specific process is as follows:
brake pedal operation : The driver presses down on the brake pedal. This action is transmitted to the brake caliper by a mechanical or hydraulic system.
hydraulic action : under the action of liquid pressure, the piston in the brake caliper moves, pushing the brake disc and the brake disc close contact.
friction brake : the friction between the brake disc and the brake disc makes the rotation speed of the wheel rapidly reduce, so as to achieve vehicle deceleration or smooth braking .
Different types and their characteristics
Ordinary disc brake : these are the most common type and are mostly used on the rear wheels of automobiles. Its low thermal attenuation phenomenon is helpful to improve the braking stability of the vehicle .
ventilated disc brake : the internal structure is hollow, allowing cold air to pass through, effectively reduce the temperature. It is commonly used in the front brake system, and also in the rear brake system of some middle and high-end cars .
perforated ventilated disc brake : on the basis of the ventilated disc, the disc surface is perforated to further enhance the heat dissipation effect. Commonly found in sports cars and some modified car brands .
carbon fiber ceramic ventilated disc brake : using special process mixed made of high-performance materials, light weight and excellent thermal decay resistance. Commonly found in high performance sports cars and racing cars .
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