Importance

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Abstract

A speed change controlling apparatus and method for a non-stage change-gear system of the V-belt type or CVT are disclosed, wherein control is performed based particularly on the torque of a non-stage change-gear to meet with a high degree of accuracy requirements in which importance is attached to the fuel cost of a vehicle or the power performance and the time for development of a speed change schedule is avoided. A torque of a change-gear is estimated and speed change control is performed based on a targeted drive shaft torque so that the necessity for a speed change schedule map is eliminated and accurate speed change control based on the torque is performed. Consequently, an object speed change characteristic can be produced readily with a high degree of accuracy. Because matching need not be performed for each vehicle, the development man-hours can be reduced remarkably.

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First Claim