Drum brake and disc brake use
As we all know, the biggest advantage of disc brake is sensitive, and its heat dissipation is also very good, brake power is more average and also good-looking, so before the use of high-end car disc brake. Now the cost of disc brake is lower and lower, disc brake in the home car more and more. Due to the general weight of the family car is not high, the requirements for sensitive greater than the requirements of strength, so the disc brake is more used in the family car. And drum brake the biggest advantage is the strength of the large, for the truck, the car itself is much heavier than the family car, plus the weight of the goods dragged is very considerable. And the fundamental brake is "stand", so to put the weight of the large truck brake, brake force requirements to be far higher than the sensitive requirements, so the large truck are using drum brake. Big truck is pneumatic hub brake, brake drum friction area is large, long time to step on the brake temperature is high, but the impact of high temperature gas path is small. Even slight air leakage in the air path does not matter much. If changed to pneumatic disc brake, friction area is small, brake after a slight air leakage braking effect is worse. If the use of hydraulic disc brake, also want to consider the long distance brake high temperature on the oil path gas resistance. And the effect that minivan USES oil pressure drum brake actually is not ideal, brake does not stand. The disc brake is used in cars at high speed brake can be quickly brake (quick reaction), braking effect stability, ventilation and heat dissipation effect is better than drum brake, of course, some cars are front plate rear drum brake.
Relative to the truck drum brake, car disc brake is the most, the front disk drum also has, but drum brake less.