Shifting Mechanisims and Variation of Frictional Coefficients for CVT using Metal Pushing V-Belts
日本語題目
英語題目Shifting Mechanisims and Variation of Frictional Coefficients for CVT using Metal Pushing V-Belts
著者名Osamu Fujimura, Kazuya Okubo, Toru Fujii, Shigeru Kanehara
掲載情報Society of Automotive Engineers, 2000
要旨

In order to reveal the shifting mechanisms for CVT using a metal pushing V-belt, three shifting rates were introduced. The belt motion in the pulley groove was also characterized using mean coefficients of friction as parameters, which identify the slippage condition of the belt in the pulley groove. The experimental results showed that one of shifting rates, dR/ds was almost constant in the narrowing pulley regardless of both rotational speed and transmitted torque. Here, R is the belt pitch radius in the pulley and s is the length measured along the belt pitch line. This fact indicates that the shifting is primarily governed by elastic deformation of blocks of the belt.
Power transmitting states were also evaluated using a different type of lubricating oil whose nominal coefficient of friction was higher than that for the conventional AT oil. The observed mean coefficients of friction vary due to oil although the basic response of the CVT unchanged.

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ベルト伝動技術論文集2007