Starting Performances Calculation Particularities of CVT-Equipped Vehicles

Abstract

The paper presents some aspects concerning the launching performances calculation in the case of the motor vehicles equipped with friction continuously variable transmissions (CVTs). Having the possibility to realize an endless number of transmission ratios, the The paper presents some aspects concerning the launching performances calculation in the case of the motor vehicles equipped with friction continuously variable transmissions (CVTs). Having the possibility to realize an endless number of transmission ratios, the CVTs may confer the advantage to select the engine’s optimum running speed independently of the vehicle driving conditions. This will confer some particularities to the vehicle starting process, as the finding of the best instantaneous ratio or as the continuous change of the vehicle’s apparent mass. These differences with respect to gear-transmission vehicles and some driveability aspects will be presented. Also, some computation results obtained for the launching of a hypothetical vehicle will be shown.