Speed change ratio controller for continuously variable transmis

Details Speed change ratio controller for continuously variable transmis Speed change ratio controller for continuously variable transmis

1998-02-10

2000-05-23

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

477 34, 477 68, B60K 4104

Patent

active

060674938

ABSTRACT:
In a speed change ratio controller of a continuously variable transmission, a speed change ratio varying mechanism which varies a speed change ratio and a speed change ratio servo device which controls this speed change ratio varying mechanism according to a signal from a microprocessor, are provided. The microprocessor sets a final speed change ratio according to the vehicle traveling conditions, and computes a deviation between the final speed change ratio and target speed change ratio. A target dynamic characteristic parameter of the speed change ratio is set according to this deviation, and the target speed change ratio and a command speed change ratio are computed based on the final speed change ratio and target dynamic characteristic parameter. By outputting the command speed change ratio obtained in this way as a signal to the speed change ratio servo device, high response speed change ratio control is achieved.

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