[특허]Method and apparatus for controlling an implement of a work machine

[미국특허] Method and apparatus for controlling an implement of a work machine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F15B-013/16
출원번호	US-0668783 (1996-06-24)
발명자 / 주소	Cobo Michael A. Duffy John D.
출원인 / 주소	Caterpillar Inc.
대리인 / 주소	Masterson
인용정보	피인용 횟수 : 24 인용 특허 : 7

초록 ▼

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, which is indicative of a desired velocity. A velocity sensor senses the velocity of the lift cylinder and tilt cylinders and responsively producing respective cylinder velocity signals. A microprocessor receives the cylinder velocity and operator command signals, determines the difference between the actual and desired cylinder velocity, and responsively produces an electrical valve signal in response to the velocity difference. 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 value signal.

대표청구항 ▼

[ We claim:] [1.] An apparatus for controllably moving a work implement of an earth moving machine having an internal combustion engine, the work implement including a boom and a bucket being attached thereto, the work implement including a plurality of work functions that includes a lifting and lowering function where the boom is actuated by a hydraulic lift cylinder and dumping and racking function where the bucket is pivoted by a hydraulic tilt cylinder, comprising:an operator controlled joystick;joystick position sensing means for sensing the position of the joystick and responsively generating operator command signals;scaling means for receiving the operator command signals and converting the operator command signals into velocity command signals;cylinder velocity sensing means for sensing the velocity of the lift and tilt cylinders, and responsively producing respective cylinder velocity signals;an engine sensor that senses the speed of the internal combustion engine and produces an engine speed signal;a cylinder pressure sensing means for sensing the hydraulic pressure associated with the lift and tilt cylinders and responsively producing respective cylinder pressure signals;controlling means for receiving the engine speed, cylinder pressure, cylinder velocity and velocity command signals; determining the difference between the cylinder velocity and velocity command signals, and responsively producing electrical valve signals in response to the velocity difference, and engine speed and cylinder pressure signals; andvalve means for receiving the electrical valve signals and controllably providing hydraulic fluid flow to the respective hydraulic cylinders to move the respective hydraulic cylinders in accordance with the velocity command signals.

이 특허에 인용된 특허 (7) 인용/피인용 타임라인 분석

Hardy Gerald D. (East Peoria IL) Hoffman John P. (Peoria IL) Kendrick Larry E. (Peoria IL), Apparatus for selectively positioning movable work element with preselected maximum velocity control.
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Kamata Seiji (Hiratsuka JPX) Kuromoto Kazunori (Hiratsuka JPX), Automatic cushioning control apparatus for cylinder of working machine.
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Lukich Michael S. (Peoria IL) Hutchison Eric A. (Peoria IL) Obermaier Lisa A. (Marquette Heights IL), Electrohydraulic control apparatus and method.
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Devier Lonnie J. (Dunlap IL) Krone John J. (Dunlap IL) Lukich Michael S. (Peoria IL) Lunzman Stephen V. (Chillicothe IL) Marsden Howard A. (Pekin IL), Hydraulic control apparatus.
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Hosseini Javad (Peoria IL), Method and apparatus for controlling an implement.
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Hosseini Javad (Peoria) Hutchison Eric A. (Peoria) Mitchell Randall M. (Washington) Phelps Weldon L. (Dunlap) Schimpf James E. (Plainfield IL), Method and apparatus for controlling an implement.
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Lund Richard A. (Chaska MN), Servovalve flow linearization circuit.
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이 특허를 인용한 특허 (24) 인용/피인용 타임라인 분석

Devier,Lonnie James; Tozawa,Shoji; Lunzman,Stephen V., Configurable hydraulic control system.
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Moriya Naoyuki,JPX ; Furuta Hideto,JPX, Construction machinery.
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Koehler Douglas W., Control to improve dump while lifting.
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Skinner, Thomas G., Controlling the deadband of a fluid system.
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Wimmer Erich,ATX, Crane.
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Berger Alan D. ; Dix Peter J. ; Chan Danley C. ; Grupka James M., Electronic control for a two-axis work implement.
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Skiba Richard J. ; Shah Vijay P. ; Stratton Kenneth L., Fluid regeneration circuit for hydraulic cylinders.
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Opdenbosch, Patrick; Storey, Joseph R., Hydraulic system and method for controlling same.
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Ma,Pengfei; Egelja,Aleksandar M.; Sorokine,Mikhail A., Hydraulic system having IMV ride control configuration.
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Zhang,Jiao; Ma,Pengfei; Schwab,Michael R., Hydraulic system having a post-pressure compensator.
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Linerode, James D.; Egelja, Aleksandar M., Implement pressure control for hydraulic circuit.
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Berg, Casey Dean; Khalamendik, Oleg; Sanders, Ted Jay, Machine attachment based speed control system.
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Berg, Casey Dean; Khalamendik, Oleg; Sanders, Ted Jay, Machine attachment based speed control system.
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Cobo Michael A. ; Gardner Cynthia M. ; Schimpf James E., Method and apparatus for controlling an implement of a work machine.
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Cobo Michael A. ; Dietz Hans P. ; O'Neill William N. ; Janson Brett J., Method and apparatus for controlling the deadband of a fluid system.
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Chenyao Chen ; Sohel Anwar ; Richard G. Ingram ; Kent C. Bates ; Sabri Cetinkunt ; Unnat Pinsopon TH, Method and system for controlling steady-state speed of hydraulic cylinders in an electrohydraulic system.
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Lombardi Frank J., Method for controlling a work implement to prevent interference with a work machine.
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Thomas, Dante Toran; Sporer, Mark Andrew; Pielmeier, Kevin Edward; Groves, Joseph Dale, Method of altering operation of work machine based on work tool performance footprint to maintain desired relationship between operational characteristics of work tool and work machine.
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Sohel Anwar ; Sabri Cetinkunt ; Chenyao Chen ; Richard G. Ingram ; Unnat Pinsopon TH, Methods for automating work machine functions.
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Daniel J. Krieger, Motion alarm.
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Dahl,Kristofor Lee; Cler,Eric Wade; Li,Wei; Aneloski,Randy G., Payload overload control system.
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Ufheil, Steven T., Tool recognition and control system for a work machine.
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Krieger Daniel J. ; Wetzel Michael D., Variable pilot pressure control for pilot valves.
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Ohhigashi, Kouji; Nagata, Noritaka; Uchimaru, Masatoshi, Work machine and control method for work machines.
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A	생활필수품
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Method and apparatus for controlling an implement of a work machine 원문보기