1. Appropriate friction coefficient: The friction coefficient of the brake pads must be moderate. If the friction coefficient is lower than 0.35, the safe braking distance will be exceeded or even the brakes will fail. If the friction coefficient is higher than 0.40, the brakes are likely to lock suddenly and cause a rollover accident. . The friction coefficient of Bosch safety brake pads is 0.39, which well meets the requirement of moderate coefficient.
2. Reliable stability: When the car is running at high speed or emergency braking, it will generate instantaneous high temperature. Under the high temperature state, the friction coefficient of the brake pad will decrease, which is called thermal recession. The thermal decay resistance of the brake pads determines the safety of automobile braking, so the brake pads must have a moderate and stable friction coefficient.
3. Satisfactory comfort: comfort is a direct reflection of friction performance, including braking feeling, noise, dust, odor, etc. Among the comfort indicators, car owners are often most concerned about the noise of the brake pads.
4. Reasonable service life: service life is a product indicator that everyone is generally concerned about. For a normal vehicle, the service life of the front brake pads is 30,000 km, and the service life of the rear brake pads is 80,000 km.