Metal V-belt type CVT (Continuously Variable Transmissions) provide an excellent fuel consumption and drivability. Therefore the CVT have received much attention. Metal V-belt type CVT have been installed into many automobiles in recent years. In Metal V-belt type CVT, an elastic deformation of blocks determines the shifting speed and the pulley thrusts at transitional state. Both driving and driven pulley thrusts were calculated by considering the forces acting on blocks at a pulley entrance, which agreed with the experimental results at not only steady state but also transitional state. The frictional performance of CVT fluids and the frictional characteristics between blocks and a pulley were evaluated by applying the mean coefficient of friction as a friction parameter. It was found from the experiments that the estimated coefficient of friction of CVT fluids was not constant with respect to operating conditions. lt changed due to relative sliding speed between blocks and the pulley, sliding direction and normal pressure acting on V-surface of the block.
A study on a metal pushing V-belt type CVT - a novel approach to characterize the friction between blocks and a pulley, and shifting mechanisms
Eine Studie zu einem Metall-Treibriemen - ein neuartiger Ansatz zur Beschreibung der Reibung zwischen Blöcken, Riemenscheibe und Verstellmechanismus
2002
11 Seiten, 26 Bilder, 13 Quellen
Aufsatz (Konferenz)
Englisch
British Library Conference Proceedings | 2002
|SAE Technical Papers | 1993
|Accessory Drive Belt/Pulley Friction Test
SAE Technical Papers | 1998
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