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Pushbelt CVTs - A Non-Smooth Challenge

Friedrich Pfeiffer, Thorsten Schindler, Heinz Ulbrich, Arie van der Velde, Arjen Brandsma
This paper deals with a spatial transient mathematical model of pushbelt Continuously Variable Transmissions (CVT) characterised by numerous contacts and a large degree of freedom. The non-smooth equations of motion are derived using methods of multibody theory and nonlinear mechanics. Thereby, the bodies themselves are described using rigid and large deflection elastic mechanical models. In-between the bodies, all possible flexible or rigid contact descriptions, namely frictionless unilateral contacts, bilateral contacts with 2D-friction and even unilateral contacts with 3D-friction occur. The resulting stiff measure differential inclusion (MDI) is integrated using robust and efficient time-stepping schemes.
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