What should we pay attention to when choosing brake pads?
We all know that the brake pad is one of the most important parts of the automobile braking system, which is directly related to the stability and reliability of the automobile braking and ensure the safety of the driver and passengers. When the brake performance of the automobile is reduced, it is very important to choose the appropriate brake pad.
So what factors should we pay attention to when we choose the brake pads? This article will take you to understand.
1、 Friction coefficient
The friction coefficient is not bigger, the better, but it can not be too small. It directly affects the braking effect of the brake pad. Since 2018, the state has also formulated the implementation standard of disc brake pads (gb5763-2018), and is the compulsory implementation standard. Only those who meet this standard are qualified brake pads. So when choosing brake pads, it is necessary to pay attention to whether there is this standard on the product packaging.
The brake pads with high friction coefficient are generally used in cars with intense driving behavior. Because these cars in the process of competition, the braking requirements of the vehicle are very high, and the fierce driving is very frequent, the temperature rise will be very fast when the brake pads, calipers and brake discs are running at high speed and frequent braking.
2、 High temperature resistance
High temperature resistance, also known as thermal attenuation (thermal attenuation temperature is 450 ℃) °~ six hundred ° Left and right). When the car is driving at high speed, when the driver steps on the brake to generate braking force, the temperature of the brake pad and brake disc will rise; With the increase of temperature, the friction performance of automobile brake pad will decrease, which is called thermal attenuation.
If the friction performance decreases sharply, the braking effect is not obvious. At present, the friction coefficient of brake pad at room temperature and high temperature is specified in the national standard. Under normal conditions, the thermal attenuation of the original brake pad is 300 ° There is obvious attenuation at the beginning; The thermal attenuation temperature of high performance brake pad is 450 ℃ °~ six hundred ° about; The thermal attenuation temperature of the brake pad is 750 ℃ °~ one thousand ° about.
3、 Wear resistance
If the friction coefficient of the brake pad is very ideal, the thermal attenuation is also very good, but after several times of use, the normal 1.5cm disc is thinned to less than 1.0, which is poor wear resistance and short service life. The wear resistance of brake pad is closely related to the material, production formula and manufacturing process of brake pad. At present, the ideal and cost-effective brake pads in the market are mostly ceramic brake pads made of composite ceramic materials. Most of the original brake pads are made of less metal and more metal.
4、 Fitness
If your brake pads have excellent performance and high friction coefficient. However, when it is installed on the vehicle, there will be brake shaking and abnormal noise. At this time, we need to check whether the brake pads, brake discs and brake calipers match, so we must pay attention to buy special brake pads suitable for our own models before buying