Common types of automatic transmission

   Common types

   Common automotive automatic transmission has three types: hydraulic automatic transmission (AT), mechanical stepless automatic transmission (CVT),electronically controlled mechanical automatic transmission (AMT). The widespread use of cars is AT, AT has almost become synonymous with automatic transmission.

According to the transmission ratio variation can be divided into the form of aclass type, variable type and comprehensive type three.

    In the variable type (and type), according to the variable types can be divided into:

   A..Hydraulic torque variator

   B. Mechanical CVT

   C. Power stepless speed

UD Series Variator

   According to the way of controlling the gear transmission system is divided into:

   A. Hydraulic control hydraulic automatic transmission in the hand control valveselection of location, by reflecting the throttle opening of the solar term valve andgovernor valve speed reflects the throttle degree and the change speed ofhydraulic signal. In the shift points, these hydraulic signals directly control the shift valve gear.

   B. Electronically controlled hydraulic automatic transmission in the hand control valve selection of location, by reflecting solar term door throttle position sensorand speed sensor speed reflects the degree of the throttle degree and the change speed of signal. These signals input to the electronic control unit (ECU),by the electronic control unit control valve and the hydraulic actuator shift.

Electronic control automatic transmission is usually composed of hydraulic torque converter, the planetary gear transmission system, the shift actuator,hydraulic control system, electronic control system composed of five parts.

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