Experimental Study on Key Influencing Factors of Rubber V-belt CVT Performance

The transmission efficiency of belt continuously variable transmission (CVT) generally fluctuates around 80%. In order to further improve transmission efficiency, gain economic benefit and reliability, domestic all-terrain off-road vehicle (ATV) is taken as the study object which presents problems such as low transmission efficiency, rubber belt slipping under heavy load condition and short working life of belt in the running test. The structure of the rubber belt CVT is simplified, and the influences of three key components, driving wheel limit spring, centrifugal fly hammer and slave wheel pressure torsion spring, on the performance of CVT are analyzed by using CVT experimental bench. The results show that the efficiency of rubber V-belt CVT is improved by optimizing the stiffness of the spring and the mass of centrifugal fly hammers, and reasonably matching parameters. This study provides some reference of experimental analysis method and performance data for the design of high efficiency rubber V-belt CVT