Is the greater the friction coefficient of brake pads, the better?
Is the greater the friction coefficient of brake pads, the better? No. Brake pad friction coefficient is designed according to the weight inertia of the car itself, it must consider speed, braking distance and comfort several technical indicators. On the market, the friction coefficient is generally marked between 0.34 and 0.42. To achieve the increase of friction coefficient is actually very simple, add the abrasive enhancer on the line. Car factories judge the quality of brake pads not by how big they are, but by whether the friction coefficient remains stable under various extreme road conditions, such as flooding, winding roads and continuous sudden braking. Many products that appear to be marked with a high friction coefficient will experience a rapid reduction in braking force or even loss of braking ability in the above emergency situation, and this phenomenon is not rare.
High or low friction coefficient of brake pad will affect brake performance.
Especially when the car needs emergency braking at high speed, the friction coefficient is too low, the brake will be insensitive, and the friction coefficient is too high, the tire lock phenomenon will occur, and then cause the vehicle tail swing and skid, posing a serious threat to driving safety.
According to the national standard, the suitable working temperature of brake friction plate is 100 ~ 350℃. However, when the temperature of many inferior brake friction plates reaches 250℃, the friction coefficient will drop sharply, and the brake will completely fail at this time. Generally speaking, in accordance with SAE standards, brake friction plate manufacturers will use FF rated coefficient, that is, friction rated coefficient between 0.34 and 0.42.
