Research of Torque Response Characteristics During the Engagement of Wet Clutches

Abstract—The engagement of wet clutch was modeled by developing a modified Reynolds equation, based on the average flow model of Patir and Cheng. Influences of surface roughness, material permeability and centrifugal force were included in the model. The Greenwood-Tripp method was used to develop the asperity contact model. The force balance equation and torque balance equation were solved together to obtain torque response characteristics during wet clutch engagement. This paper shows that viscosity has effect on viscous torque; material permeability affects the engagement time and torque response; and the applied pressure greatly influences engagement time than other parameters. Keywords-wet clutch, engagement, torque response