Development of New CVT for Compact Car

Fumikazu Maruyama; Moichio Kojima; Tomoyuki Kanda

doi:10.4271/2015-01-1091

A new CVT that is lighter in weight and more highly efficient than the previous CVT for use in compact vehicles has been developed and used in the 2014 model year FIT. The allowable torque capacity was expanded to that of the 1.8-L engine class, making this CVT usable in a greater number of vehicle models. The ratio coverage was also expanded and the transfer efficiency was increased to enhance fuel economy and drivability.

Integration of hydraulic control system functional parts and reduction in the number of case component parts were carried out as structural modifications. Pulley side pressures were also reduced by the use of new CVT fluid so that the pulley could be made more compact and lighter in weight.

Enhancements were made in CVT shift control, providing more acceleration considered from the driver's acceleration demand and more linearity between vehicle speed and engine speed than in previous models.

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Development of New CVT for Compact Car 2015-01-1091

SAE MOBILUS