Traction Characteristics of Traction Oil for Automotive Use

Abstract

A disk-on-ball type EHL tester was built as a trial to study the traction characteristics under EHD conditions. The performance of the tester was confirmed using the commercially available traction oil for automotive traction drive. The traction coefficient decreased with increasing temperature while it was little affected by change in contact pressure. This is probably because an EHL oil film behaved as a plastic solid. In addition, the influence of skew component was found to be critical. The experimental results were in good agreement with the previous reports.