Common faults of the chip--abnormal noise
The brake pads are zero in the middle, the brakes in the zero brakes and the yes, the brake pads, the brake pads, the brake pads also have certain, for example, for example, for example, half, half, half, ceramic pads are suitable The car models are different. Generally, metal sheets are used on cars with relatively large displacement, and ceramic sheets are generally used on cars with relatively small displacement. , the probability of noise products is relatively large, the film is relatively non-wearable, and the probability of noise products is relatively small.
Today, let's analyze the faults that are often seen in car films
One: abnormal noise
The abnormal sound of brake pads is the most complained about among the common faults of brake pads, and it is also the most troublesome problem, because this problem cannot be eliminated fundamentally, and there is no guarantee that there will be no abnormal noise after treatment, and the cause of the abnormal brake sound There are many, and it is difficult to find the specific fault point. We can only find ways to reduce the probability of abnormal noise. Therefore, the brake pad supplier has adopted methods such as adding sound-absorbing sheets and applying sound-absorbing glue to minimize the probability of noise generation. However, the facts have proved This can only reduce the probability of noise generation, but cannot eliminate it.
There is a very incisive saying about the abnormal noise of brake pads. The abnormal noise is a non-functional failure (normal abnormal noise, everyone can understand it)
The common reasons for the abnormal sound of brake pads are as follows:
1. Brake pads
From the introduction, we know that there are metal sheets in the brake pads, and the friction coefficient also has different sizes. Because the metal sheets have metal (iron or copper and other metals) inside, the brake disc material is generally cast iron, so in the process of braking, The probability of noise generated by the friction between metal and metal will be relatively large, and the brake pad with a relatively large friction coefficient, which is commonly known as the brake pad is relatively hard, so the probability of generating noise during braking is also relatively high, just like rubber in the brake pads. The noise produced by friction against the wall is much smaller than the noise produced by iron blocks against the wall
2. Brake disc
(1) old disk
Brake discs and brake pads work together, so if the working surface of the brake disc is uneven, it will also cause abnormal noise, because at this time the brake pads are mounted on the working surface of the brake disc, just like soap rubbing It seems that the plate is rubbing against each other. At this time, due to the reduction of the contact area, it will cause abnormal noise. This is the reason why the new plate and the old plate need to be run-in.
In addition, after a long period of wear and tear, the old disc will form a boss on the edge of the brake disc. After the new disc is installed, the edge of the brake pad will rub against the boss, which will cause abnormal noise.
(2) new disk
After the new disc and film are installed, it needs to run in for a period of time. At this time, there may be abnormal noises. It may be fine after a period of running in.
