engleski

Modeling of an Automotive Planetary Gear Set Based on Karnopp Model for Clutch Friction

Planetary gear sets of automotive automatic transmissions include several hydraulic and one-way clutches. Clutch friction is traditionally described by the generalized, Stribeck, speed-dependent static function approximated by a steep straight line in the zero-speed region (so-called classical friction model). Another approach based on the Karnopp clutch friction model is proposed in this paper. Simulation results for park/reverse engagement and 1-2 upshift shows that the proposed gear set modeling method compared to the classical friction model-based method yields significant improvement with respect to simulation time, as well as accuracy.

Modeling; planetary gears; clutch; friction

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