Jatco Transtechnology Ltd.

Makoto Sawada

Yoshichika Hagiwara

A CVT has a torque convener (T/C) speed ratio calculation section that determines the speed ratio from the engine speed and the primary pulley speed. The calculation section then calculates the torque ratio from the speed ratio. An input torque estimation section then estimates the input torque input into CVT from the torque ratio and the determined engine output torque. The T/C speed ratio calculation section, having a correction amount calculation section, reduces the speed ratio when the accelerator pedal is depressed to less than Np/Ne. Because the disparity with real value of the speed ratio occurring in the dead time of the respective revolution sensors can be decreased and the input torque properly estimated, slippage between the V belt and the variable pulley is prevented.

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Fuji, Japan

Makoto Sawada