Encyclopedia of common problems of brake pads (Part 1)
The quality of brake pads directly affects our safety, and because of this importance, the country has a strict access system for brake pads. But even so, as a consumer, if you want to buy original car quality products in the market, it is really a technical job to test your vision. Today, we analyze the causes of common problems of brake pads from a purely technical perspective, so that everyone can know how to choose the brake pads that suit you
1. What is the short life of the brake pads? Why do inferior products have long braking distances in emergency braking situations?
Answer: Like all objects, the strength of the intermolecular links of its material tissue decreases at high temperatures. The principle of braking is to convert kinetic energy into heat energy in the form of friction to achieve braking (energy balance theory). Therefore, a large amount of heat generated by the friction between the brake pad and the disc will accumulate on the surface of the brake pad friction material. In order to maintain sufficient strength of the brake pads under such high temperature conditions, materials such as high-temperature resistant resin, high-purity graphite, and high-purity barium sulfate must be selected, and these materials are as if you only choose the same size from a car of carbon. Like coal, the cost will rise substantially. As for inferior brake pads, they will not use such high-end materials, so they cannot guarantee the stability at high temperatures, and as the speed increases, the heat will be more, the temperature will be higher, and the link strength will be lower, thereby reducing brake pads. Dynamic performance, expressed as extended braking distance. Therefore, the brake pads that you think are acceptable when driving at a speed of 20-60 kilometers per hour in the city do not mean that you have the same stable braking distance performance at high speeds. When the link strength of the molecular chain is reduced at high temperature, its wear is accelerated, which is why the service life of general brand brake pads is very short in mountainous areas or under frequent sudden braking.
2. Is it true that the brake pads of the original car have no noise?
It can only be said that the probability is extremely low. Because there are too many factors that cause noise, and the main ability of brake pads is to maintain a stable braking ability under various extreme road conditions.
