This article introduces the structure and working principle of the Audi 01J continuously variable transmission (CVT), including the functions of the damper buffer device, power device, speed ratio adjustment converter, sensors, hydraulic control unit, and electronic control unit. It also explains the working principle of the planetary gear system, forward clutch/reverse brake, and speed ratio system. Additionally, it describes the structure and functions of the CVT hydraulic control system.
This document describes the mechanical Continuously Variable Transmission (CVT), specifically the Audi 01J model (Multitronic). It details the transmission's composition, including the vibration damper buffer device, power unit, gear ratio adjustment transformer, sensors, hydraulic control unit, and electronic control unit. The text explains the function of each system, such as the flywheel vibration damper and the planetary gear set used as a reverse gear device.
The document further elaborates on the gear ratio system, illustrating the principle of ratio transformation and the structure of the transformer. It also covers the output device, noting that the Multitronic transmission utilizes three solenoid valves (N88, N215, and N216) designed as pressure control valves. Finally, it presents the control system circuit diagram. This manual is written in Chinese.