This paper describes the derivation and the validation of a two-dimensional model of a pushbelt variator. Its application enables the analysis of the dynamics and the improvement of the performance of the real system like for instance on fuel consumption. As a result of efficiency simulations a detailed distribution of losses at single contacts is presented. Parameter analyses have shown that a major fuel economy improvement can be achieved by a reduction of clamping forces. It is shown, that by lowering clamping forces all examined losses (bearings, internal pushbelt and element-pulley) will decrease. These simulations support the ongoing development for a new clamping force strategy. With this so-called 'slip control' strategy fuel consumption improvements of 5 % have been achieved.
Dynamics of pushbelt CVTs
Dynamik von Schubglieder-CVTs
2007
8 Seiten, 7 Bilder, 7 Quellen
Aufsatz (Konferenz)
Englisch
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