Analysis of common problems in automobile brake shoes
The brake shoe of the car is an important accessory in the brake system. The brake shoe can effectively reduce the speed of the car, and the car is safer to drive. Let me talk about the common problems and analytical answers of car brake shoes, I hope to help everyone.
What is the relationship between the life of the brake shoe and the hardness? What are the influencing factors?
1. Factors affecting the life of the brake shoe include hardness, strength, wear of the friction material, and the like.
2. There is no relationship between the life of the brake shoe and the surface hardness. When the surface hardness is high, the actual contact area between the brake shoe and the brake disk is small, which often affects the life.
Question: Why is there a jitter when braking?
1. This is often caused by deformation of brake shoes or brake discs. It is related to material, processing precision and heat deformation. It includes: poor thickness of brake disc, roundness of brake drum, uneven wear, thermal deformation, hot spot and so on.
2. The friction coefficient of the brake shoes is unstable and high.
3. The vibration frequency generated by the brake shoes during braking is resonant with the suspension system.
What is the effect of the friction coefficient on the brake?
Too high or too low friction coefficient will affect the braking performance of the car. Especially when the car needs emergency braking during high-speed driving, if the friction coefficient is too low, the brake will be insensitive; if the friction coefficient is too high, there will be a lock-up phenomenon, causing the vehicle to squat, slip, and turn over, posing a serious threat to driving safety.
Why is it that the new brake shoes can not be stopped after being installed?
The possible reasons are as follows:
1. Brake installation does not meet the requirements.
2. The brake line is faulty or the brake fluid is insufficient.
3. The surface of the brake disc is contaminated and not cleaned.
4. The exhaust in the hydraulic cylinder is not complete.
5. The brake disc quality is unqualified.
6, the brake disc is excessively worn, the surface is not flat, resulting in the brake shoe and the disc can not fit well.
What is the impact on the brakes after wading?
When the wheel is immersed in water, a water film is formed between the brake shoe and the brake disc/drum, thereby reducing the friction and the water in the brake drum is not easily dissipated.
For disc brake shoes, this brake failure is better. Because the brake shoe area of the disc brake system is small, the outer periphery of the disc is completely exposed, and water droplets cannot be retained. In this way, due to the centrifugal force when the wheel rotates, the water droplets on the disc will be automatically lost, and the function of the brake system will not be affected.
For drum brake shoes, step on the brakes while walking away from the water, that is, the right foot on the throttle, the left foot on the brakes. After several consecutive steps, the water droplets between the brake shoe and the brake drum will be wiped off. At the same time, the heat generated by the friction will dry it, so that the brakes quickly return to their original sensitivity.
The above is a common problem and analysis of the brake shoes of the car. I hope everyone can understand the common problems of the car brake pads and help them.