In order to maintain the performance of push belt Continuously Variable Transmissions (CVT) over a long period of time, it is important to acquire a fundamental understanding of lubrication performance between a pulley and a metal V-belt. This work examined oil film thickness using the contact pressure on a sliding surface of pulley sheave during driving, which was obtained with an uniquely developed measurement technique. The contact between a belt element and a pulley sheave was treated as a group of small elliptical contact zones. The pressure-viscosity characteristics of lubricant were assigned to Reynolds equation with Roelands experimental formula. Also, in order to increase convergence of the calculation, a multigrid method was used. Calculation results indicate that the oil film thickness at a peak contact pressure measured was approximately 0.3-0.4 μm.
Measurement of Oil Film Pressure on Running Continuously Variable Transmission Pulley - Part 2: Oil Film Thickness Calculation Based on EHL Theory
Sae International Journal of Passenger Cars. Mechanical Systems
Sae Int. J. Passeng. Cars - Mech. Syst
SAE 2014 World Congress & Exhibition ; 2014
Sae International Journal of Passenger Cars - Mechanical Systems ; 7 , 2 ; 897-901
2014-04-01
5 pages
Aufsatz (Konferenz)
Englisch