Motors: expansible chamber type – Working member position feedback to motive fluid control – Electrical input and feedback signal means
Patent
1997-06-09
1999-03-02
Nguyen, Hoang
Motors: expansible chamber type
Working member position feedback to motive fluid control
Electrical input and feedback signal means
91511, 91459, 60327, F15B 1316
Patent
active
058757015
ABSTRACT:
An apparatus for controllably moving a work implement is disclosed. The implement is connected to a work machine and is moveable in response to operation of a hydraulic cylinder. The apparatus includes an operator controlled joystick. A joystick position sensor senses the position of the joystick and responsively generates an operator command signal. Boom and bucket angle sensors sense the position of the work implement and responsively produces an boom angle signal and a bucket angle signal respectively. A microprocessor based controller receives the boom angle, bucket angle, and operator command signals, modifies the operator command signal, and produces an electrical valve signal in response to the modified operator command signal. An electrohydraulic valve receives the electrical valve signal, and controllably provides hydraulic fluid flow to the hydraulic cylinder in response to a magnitude of the electrical valve signal.
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Application No 8/668,886 filed Jun. 24, 1996.
Cobo Michael A.
Dietz Hans P.
Gardner Cynthia M.
Stone Robert E.
Caterpillar Inc.
Masterson David M.
McPherson W. Brian
Nguyen Hoang
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