Barke Pads 29279

Wear life of automotive rear brake pads

The wear of the friction pair is the main reason for the deterioration of the braking state. The friction works in the form of dynamic matching. The material loss of the friction surface gradually increases with the increase of the number of times of use. When the wear accumulates to a certain extent, the dynamic friction pair is gradually changed. Characteristic parameters, reducing work ability. The wear of other mating components also affects the wear of the friction pair. For example, uneven wear of the brake cam affects the lift of the cam, which in turn affects the amount of displacement of the shoe until it affects the contact of the friction material with the dual.

Wear depends on the condition of the friction and the state of the friction. The friction material is mostly in the form of dry friction. This unlubricated friction condition is a harsh condition for the friction pair, which inevitably causes wear to increase the matching clearance and affect the braking performance. Moreover, in general, the wear of the friction pair is uneven wear, and the wear gap caused by all the wear is also uneven, and the unevenness is prominent on the drum brake. The unevenness of the friction changes the distribution of the brake pressure, which causes the uneven wear of the friction pair to increase. In addition, the frictional heating of the braking process and the dust entering the friction pair in the operating environment cause the driving wear process, which is hot. Wear, abrasive wear, adhesive wear, fatigue wear, etc. work simultaneously, ie wear is unavoidable. However, the amount and speed of wear can be controlled, because the speed of wear depends on the frequency and frequency of use, the intensity of use, the environment of use and the level of use.

Brake system tips

We all know that the brake system of a car is a series of specialized devices that can force the speed of the car to be forced down or stopped. Its function is very important for the safety of the car. In addition to ensuring that the car can be stopped at the driver's request and the vehicle is reliably parked, it can also ensure the safety of the car and the driver.

1. Antilock brake system (ABS). Its function is to automatically control the braking force of the brake when the car brakes, so that the wheel is not locked, and it is in the state of rolling on the side (slip rate is about 20%) to ensure the maximum adhesion between the wheel and the ground. value. If the instrument's ABS warning light is on, please go to the 4S shop as soon as possible to check and deal with it, to avoid affecting your driving safety and delay the trip.

2. Release the brake after starting and hear the friction between the brake pad and the brake disc. This is normal. After the engine is started, the driver will step on the brakes before the gear is engaged. When the gear is engaged, the brakes are released and the vehicle starts to drive. At this time, the brake pads of the brake pads have been fitted under normal temperature conditions, but they have not been produced. A lot of friction, the front or rear driving force will be generated after the vehicle is in gear. When the brake pedal is released, the brake disc of the brake pad will produce a sound similar to “咕咕”. This sound will be more noticeable if the brake disc is wet after washing the car.

3. It is normal for the hand brake to be used after a period of time. The handbrake cable is composed of multiple sets of wires. It has a certain ductility after being stressed. After a period of use, it will have a certain elongation than the length of the new car, and will not have any effect on the parking brake. .

4. Heat after use of the brake disc: This is a normal phenomenon. The brake is realized by friction between the brake disc and the brake disc. It is a process of converting kinetic energy into heat energy, so a large amount of heat is generated. Do not touch the brake disc with your hands after parking to avoid being burnt.

5. Brake disc rust: The main component of the brake disc is iron. After the vehicle is not used for a long time or used in rainy days, the surface of the disc will produce certain rust. This kind of phenomenon is not to be worried. Generally, the vehicle will rub the rust through the brakes while driving, and it will not affect the normal use.