What does the automobile powertrain accessory refer to?

Automobile powertrain accessories refer to the engine and transmission. The engine can be said to be the most important part of the car, and its layout has a great influence on the performance of the car. For cars, the layout of engines can be simply divided into three types: front, middle and rear.

Transmission is a mechanical device used to change the engine speed and torque. It can change the transmission ratio of the output shaft and the input shaft by fixing or stepping, which is also called gearbox.

The transmission consists of a variable speed transmission mechanism and a control mechanism, and the automobile also has a power output mechanism. The transmission mechanism uses ordinary gear transmission, and some are planetary gear transmission. Gear transmission mechanism generally adopts sliding gear and synchronizer.

Extended data:

Simple transmission has high efficiency, simple structure, convenient use, few gears and small range of I change (small range of traction and speed change), which is only suitable for some lathe workers with few gears.

If the range of I increases, the size of the transmission will increase and the axle span will increase. In order to increase the number of gears without making the wheelbase too large, combined transmission can be adopted.

The constituent transmission usually consists of two simple transmissions, of which the one with more gears is called the main transmission and the one with less gears is called the auxiliary transmission.

References:

Baidu Encyclopedia-Transmission