Method for controlling a hydraulic valve of an automatic transmi

Details Method for controlling a hydraulic valve of an automatic transmi Method for controlling a hydraulic valve of an automatic transmi

1999-08-04

2000-10-31

Lorence, Richard M.

192 clutches and power-stop control

Clutches

Operators

192109F, F16D 2500

Patent

active

061388106

ABSTRACT:
A method for controlling operation of a hydraulic valve having a magnet fixed to a displaceable spool, a sensor producing a signal responsive to the sensed intensity of a field produced by the magnet representing the position of the spool in the valve spool, the method comprising producing from the signal a time series record of the position of the spool; determining the desired position of the spool, producing a error signal from the difference between actual and desired spool position, determining a compensated correction error, producing a commanded control pressure signal to change the magnitude of control pressure supplied to the valve, and changing the position of the spool in response to the control pressure signal.

REFERENCES:
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patent: 4617968 (1986-10-01), Hendrixon
patent: 4942787 (1990-07-01), Aoki et al.
patent: 4962831 (1990-10-01), Dundas
patent: 5002090 (1991-03-01), Ichikawa et al.
patent: 5240041 (1993-08-01), Garnjost
patent: 5244002 (1993-09-01), Frederick
patent: 5722459 (1998-03-01), Kim et al.
patent: 5787915 (1998-08-01), Byers et al.
patent: 5826616 (1998-10-01), Golden
patent: 5957260 (1999-09-01), Kunii

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