Motors: expansible chamber type – Working member position feedback to motive fluid control – Electrical input and feedback signal means
Patent
1990-06-15
1993-06-15
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Electrical input and feedback signal means
91459, 60459, F15B 1316, F15B 13044
Patent
active
052188957
ABSTRACT:
An apparatus, is adapted to controllably position a movable element in a hydraulic motor. A controller receives a request signal and velocity and/or position signals from sensors. The controller, in accordance with a control scheme using velocity and/or position feedback, determines the flow of hydraulic fluid to the cylinder needed to reduce velocity and/or position errors. A directional valve, actuated by an electrohydraulic pilot system, delivers hydraulic fluid to the hydraulic motor.
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Hutchison Eric A.
Lukich Michael S.
Obermaier Lisa A.
Caterpillar Inc.
Look Edward K.
Nguyen Hoang
Yee James R.
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