State-space Model of an Electro-Hydraulic Actuated Wet Clutch

Automotive engineers are continuously exploring various transmission technologies to increase vehicle performance, fuel economy and safety. The most common control devices inside the transmission are hydraulic actuated clutches. In this paper a state-space model for a wet clutch actuated by an electro-hydraulic valve used by Volkswagen for automatic transmission is presented. The developed model was implemented in Matlab-Simulink and was validated against the data obtained from a test bench provided by Continental Automotive Romania. The simulations are very similar to the experimental data proving that the modeling approach is suitable to this kind of clutch actuated by an electro-hydraulic pressure reducing valve.