What is the role and types of transmission?

The following is about the role and types of transmission:1, the role of the transmission: the role of the transmission is mainly manifested in three aspects: the first change in gear ratios to expand the driving wheel torque and speed of the range of change; the second in the case of the engine steering is unchanged to achieve the car driving in reverse; the third use of neutral to interrupt the engine power transfer so that the engine can be started, idling. 2, the type of transmission: the automotive Transmission can be divided into manual transmission and automatic transmission according to the control mode. There are four common automatic transmissions are: automatic clutch transmission (AMT), hydraulic automatic transmission (AT), mechanical continuously variable automatic transmission (CVT), dual-clutch transmission (DSG), etc. 3, manual transmission: ManualTransmission (ManualTransmission referred to as MT) is the transmission lever must be dialed by hand to change the transmission ratio of the transmission. Transmission ratio of the transmission. Manual transmission is mainly by the shell, transmission components (input and output shafts, gears, synchronizers, etc.), manipulation components (shift lever, fork, etc.). The working principle of manual transmission: through the toggle lever to switch the intermediate shaft of the active gear through a combination of different sizes of gears and the power output shaft to change the torque and speed of the drive wheel.