2018 Volume 49 Issue 6 Pages 1230-1236
The present study shows how the power is transmitted from driving to driven pulleys under fluctuated torque for metal V-belt CVT. The applied torque amplitude is periodically greater than a half of the mean torque for every one rotation. Consequently, the torque applied to the smaller pitch diameter pulley is often enough to cause sliding slip for every rotation. However, the experimental results confirmed that no sliding slip macroscopically occurred while partial slip called micro sliding slip occurred when the maximum torque exceeded the critical torque for a given thrust. The micro sliding slip reduces the power transmitting efficiency, and probably gives additional damage to pulleys and elements of the belt. When we applied a periodically altered thrust synchronized to the fluctuating torque, the efficiency appreciably increased, suggesting that the metal V-belts drives were more widely applicable to reduced size and cylinders engines.
