Robust control for three-position transmission shift actuator as

Details Robust control for three-position transmission shift actuator as Robust control for three-position transmission shift actuator as

1998-10-26

1999-11-30

Wright, Dirk

Machine element or mechanism

Gearing

In series plural interchangeably locked nonplanetary units

74335, F16H 5908

Patent

active

059922672

ABSTRACT:
A robust control (10) for a pressurized-fluid-operated, three-position shift actuator piston assembly (12). The system requires only a single controlled source of pressurized fluid (44) to provide movement to and retention in a selected one of three axially displaced positions (D, N, OD). A solenoid-controlled valve (42) is controlled by pulse width modulation. Current applied to the solenoid coil is controlled (46), voltage (V) applied to the solenoid coil is sensed and used as a control parameter and/or a relatively light detent (48, 50) biases the assembly to a neutral (N) position to provide a robust control.

REFERENCES:
patent: 4748863 (1988-06-01), McNinch, Jr.
patent: 5144863 (1992-09-01), Wood
patent: 5172604 (1992-12-01), Monette et al.
patent: 5390561 (1995-02-01), Stine
patent: 5528949 (1996-06-01), Stainton et al.
patent: 5651292 (1997-07-01), Genise
patent: 5661998 (1997-09-01), Genise
patent: 5669265 (1997-09-01), Adler

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