CVT-차동기어장치의 구성에 따른 효율해석에 관한 연구

초록

Continuously Variable Transmission(CVT) combined continuously variable unit(CVU) with differential gear has many advantages which are the decrease of CVT size, the increase of overall efficiency, the extension of speed ratio range, the generation of geared neutral. It is known that such CVT can be classified according to the coupling location of CVU and the direction of internal power flows. In this paper, six different configurations of CVT combined V-belt CVU with simple differential gear are presented, which are input coupled systems. The types and the conditions associated with each direction of power flow are stated for each configurations. Some useful theoretical formula which are overall speed ratio, proportion of input power carried by CVU and differential gear, overall efficiency termed mating efficiency of gears and speed ratio are derived. Some general properties also deduced which serve to indicate the design of transmission most suited to a specified requirement.