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The dynamic model of a multi-disc clutch is developed that can calculate the contact pressure and the spline friction force acting at each friction surface. The thermal model is employed to investigate the temperature variation of each friction component. The simulation results show that due to the existence of spline friction, the contact pressure decreases along the axial direction, thus leading to the decline of the spline friction force. Moreover, because of the attenuation of contact pressure, the surface temperature and friction torque decrease gradually along the axial direction. The highest temperature and friction torque both occur in the plate near the clutch piston. Therefore, the plate close to the piston is more prone to the thermal buckling.

Numerical Investigation on the Thermodynamic Behaviour of the Friction Pairs in a Multi-disc Clutch