Shift control system for troidal continuously variable transmiss

Details Shift control system for troidal continuously variable transmiss Shift control system for troidal continuously variable transmiss

1996-04-23

1997-10-07

Wright, Dirk

Planetary gear transmission systems or components

Planet pinion is friction gear

Variable speed ratio

475 3, F16H 1504

Patent

active

056741456

ABSTRACT:
A shift control system for a troidal continuously variable transmission, which serves to return power rollers to an initial position by returning a shift control valve to a neutral position through feedback of a power roller tilting angle to the shift control valve via a mechanical feedback system, comprises an electronic feedback system for feeding back, for calculation of a shift command value, a deviation of a speed ratio from a target speed ratio corresponding to a target tilting angle in accordance with a predetermined gain, and a mechanical feedback function cancellation system for canceling, for calculation of the shift command value, the function of the mechanical feedback system through electronic feedback of the power roller tilting angle as detected in accordance with a gain equivalent to that of the mechanical feedback system.

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