1. Qualified friction coefficient
The coefficient of friction is the most basic parameter of friction materials and determines the basic braking torque of the brake pads. The national standard strictly requires manufacturers to indicate the friction coefficient on the packaging. The coefficient of friction must be appropriate, too high will cause wheel lock, direction loss, and burnout during braking. Too low a braking distance will be too long.
2. Reliable security
Brake pads will generate instantaneous high temperature when braking, especially when driving at high speed or during emergency braking. Under high temperature, the friction coefficient of the friction plate will decrease, which is called thermal degeneration. The level of thermal decay determines safety at high temperatures and emergency braking.
3. Satisfactory comfort
Comfort is a direct expression of friction performance, including braking sensation, noise, dust, smoke, odor, etc. With the increase in private cars and the improvement of people's living standards, under the basic premise of meeting safety, comfort has become an important indicator of friction plates.
4. Reasonable life
The service life is a product index that everyone pays attention to. Usually, brake pads can guarantee a service life of 30,000 kilometers. Large-grain graphite and brass used in Bosch brake pad materials can also reduce the wear on the brake discs.
The editor recommends that car owners choose original parts as much as possible when choosing to replace brake pads. Of course, the quality of the original parts is definitely guaranteed, but the relative price is also more expensive. But as the saying goes, for every penny you pay, we still have to spend these things, safety first.
And, if car owners are replacing brake pads in a repair shop, they need to be very cautious. In order to save costs, the brake pads selected by some repair shops do not have an alarm line on the steel back. Even if all the friction materials are worn out, there will be no howling. This is quite dangerous.