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Brake protector of the car, with the continuous develop […]
Brake protector of the car, with the continuous development of the automotive industry, ceramic brake visibility is gradually increased, sales of brake ceramics are also more and more big, and the ceramic brake is especially important in automobile braking systems, how do we choose?
The following technical specifications are generally required in the selection of ceramic brake pads:
1, friction coefficient: the friction coefficient of ceramic brake is very important when it is in the condition of cold, wet, high temperature, cold and heat alternation and high temperature.
2. Service life: to extend the service life as far as possible and to reduce the frequency of replacement.
3, noise: whether it is emergency braking or normal brakes, light brakes or continuous brakes, can not produce a harsh noise.
4, comfort: comfort should be such a feeling, a little random taste. It's difficult to adjust the formula to achieve this feeling. The brake coefficient is too big. No, it's too small. It's too small. The friction coefficient is too large, the braking ability is very strong, but the car will bow, shake, noise, and it's smaller. It's more dangerous. It feels like it should stop.
5, thermal expansion: continuous braking and emergency braking will lead to high temperature, according to the physical principle of expansion and contraction, the brakes will expand, but in its expansion must be maintained in a very small range expansion is too large, will lead to the gap between the pads and the dual is too small, and make keep the brake disc in normal driving process, resulting in brake cylinder temperature oil, brake failure.
6, heat recession: ceramic brake pad requires the friction coefficient of the ceramic brake pad, cold, hot, sour, sweet, and everything can be done. The material must be adapted to a wide temperature range, ensuring that it can not reduce its capability under all conditions.
7, compressibility: it reflects that when we brake with a certain braking force, the ceramic brake pad can not be too soft or too hard, too soft, will affect the reaction time of the brake pad, too hard, the wound plate and easy to produce noise. According to the corresponding standard, the amount of compression is between 0.1~0.2mm.
8, no damage: the social cost of ceramic brake shoes is much lower than that of brake discs. The development of other high polluting projects is not allowed in western developed areas such as Europe and America, so China's brake discs occupy 70% of the world's capacity. We also feel complacent. So, in this dual request to be worn brake instead of the brake disc, used in Japan in the high-end models on a ceramic brake ability is very important not only hurt the wheel brake wear, so few people in the customer service market sell Japanese TOYOTA vehicle brake disc, because it does not wear. Only wear themselves and ensure their service life. To solve this contradiction, we need very high technology and use better materials. The reason why the price of ceramic products is high is here. Nowadays, too many brake pads on the market have added enough grinding aids to ensure their service life, but they can't solve the grinding disc and noise, which are the immature expression of formula technology.
9, environmental protection: now we all know that Europe and America are not allowed to use asbestos. Even if you add sepiolite and other asbestos containing materials in the recipes, they will lead to returns and fines. In China, a large number of heavy trucks are still used asbestos. The United States now has a proposal that products are not allowed to exist. The introduction of these legislation will also promote the progress of the friction material industry. Those factories without research and development capability will be phased out.