Drive train Drive train is generally composed of clutch, transmission, universal drive, main reducer, differential and half shaft.

The power of the automobile engine is transmitted to the driving wheels through the transmission system. The transmission system has the functions of deceleration, speed change, reversing, power interruption, differential speed between wheels, differential speed between shafts and so on. Working with the engine can ensure the normal running of the car under various working conditions, with good power and economy.

According to the function of the braking system:

The braking system can be divided into service braking system, parking braking system, emergency braking system and auxiliary braking system. The braking system used to slow down or even stop a moving car is called a service braking system. The braking system used to stop a stopped car is called parking braking system.

In the case of failure of the service braking system, the braking system that ensures that the car can still slow down or stop is called emergency braking system; During driving, the auxiliary braking system reduces the vehicle speed or keeps the vehicle speed stable, but the braking system of vehicle emergency braking cannot be called the auxiliary braking system. Among the above braking systems, the service braking system and the parking braking system are necessary for every vehicle.

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