Talking about the abnormal brake noise and noise of motor vehicles

When the vehicle is braking while driving, if the wheels make a "click, bang" sound and the vehicle body trembles, it is possible to park and check the rear axle. When the wheel rotates off the ground, if a “brush or brush” sounds, the reason is that the gap between the brake shoe and the brake drum is too small, or the brake drum is out of round, or the brake spring fails to brake the shoe. return. When the wheel rotates off the ground and brakes, if a "click or click" sound is generated, it is usually caused by the spring breaking off or the supporting pin locking piece coming off; if a "click and click" sound is produced, it is usually due to the brake. Mud, water, or friction plates hardened, rivet heads exposed. In addition, when a motor vehicle brakes while driving, especially when it is at a high speed for emergency braking, the squeal caused by the brake is often heard. This is what is commonly referred to as a brake noise. The source is the brake shoe, which is transmitted via the brake shoe pin to the brake shoe and sounds. The friction coefficient of the brake shoe friction plate is not only related to the temperature, but also related to the speed and pressure of the sliding friction. When the temperature, pressure, and friction speed change during braking, the friction between the brake drum and the brake shoe also changes, which provides the braking system with a continuously acting alternating force, which easily causes the system to self-excited. Make noise. During the use of a motor vehicle, it is generally difficult to change the structure to prevent the occurrence of brake noise. Only the driving operation, maintenance, and repair can be used to eliminate or reduce the noise. For example, driving as fast as possible and using as little braking as possible. (especially emergency braking), to avoid brake shoes friction, timely fastening loose parts, timely adjustment of the gap or replace the bush and timely repair out of round brake drum.

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