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특허 상세정보

Control system for variable displacement pumps and motors

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01B-025/06   
미국특허분류(USC) 91/497 ; 60/447 ; 60/448 ; 417/221
출원번호 US-0484077 (1983-04-11)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 21  인용 특허 : 3
초록

A hydraulic motor control system comprises a speed control loop and a pressure control loop which provide closed loop control of a variable displacement chamber space and the mechanical advantage coupling thereof to the motor output shaft. The speed control loop is effective in the speed control mode of operation to maintain a set speed within a given load range. In response to load increases beyond said range, the pressure control loop pre-empts the speed control loop so that the control operates in a constant horsepower mode.

대표
청구항

A system for controlling a hydraulic fluid powered rotary output shaft comprising a chamber space for hydraulic power fluid having variable displacement, an operative coupling from said chamber space effective to rotate said output shaft by the hydraulic power fluid in said chamber space, means to adjust the displacement of said variable displacement chamber space, means providing a speed representative signal representative of the rotational speed of said output shaft, means providing another signal representing another parameter indicative of load on s...

이 특허를 인용한 특허 피인용횟수: 21

  1. Nozari Farhad. Aircraft hydraulic pump control system. USP1999025865602.
  2. Nanri, Takehiko; Itani, Yoshinobu. Control method for continuously variable transmission. USP2003026519937.
  3. Nakamura Shinya (Toyota JPX) Kubo Seitoku (Toyota JPX) Taga Yutaka (Toyota JPX). Control system and method for controlling output type hydraulic fluid pump of automatic transmission providing increased. USP1987094693081.
  4. Smith, David P.. Electro-hydraulic pump control system. USP2004026684636.
  5. Schaub Herbert R. (Amherst NY). Gas supply system for variable demand application. USP1986124627243.
  6. Morrow, David John; Chambers, Keith David Robert; McGowan, David John; Gordon, Peter Thomas Alexander; Desai, Paresh Rameschchandra; Hill, Stephen Francis. Gen-Set control system having proactive load relief. USP2013108560201.
  7. Ikarashi, Masaaki; Sugita, Toshimichi; Okochi, Yasuo. Hydraulic source control device, injection molding apparatus, and method of controlling hydraulic source. USP2017059657569.
  8. Bausenhart Heinz (Nersingen-Leibi DEX) Leibing Karl-Heinz (Gerstetten-Dettihgen DEX). Hydrostatic travelling drive. USP1997105678462.
  9. Horiuchi, Hitoshi; Nakatsuji, Jun. Load dependent variable speed hydraulic unit. USP2003036537032.
  10. Du, Hongliu. Method and apparatus for controlling a hydraulic motor. USP2005026848254.
  11. Kowatari Youichi,JPX ; Hirata Toichi,JPX ; Takegahara Hidefumi,JPX ; Toyooka Tsukasa,JPX ; Ishikawa Kouji,JPX ; Sugiyama Genroku,JPX ; Yoshinaga Shigehiro,JPX. Output correcting method in control system, control system, and hydraulic pump control system. USP2000086101456.
  12. Ebbing Steven J. (Rockford IL) Hermans Robert J. (Rockford IL) Vicari John J. (Rockford IL) Beneditz Bruce D. (Roscoe IL). Power drive unit and control system therefor. USP1987014635441.
  13. Kraft, Troy D.; Schuh, Scott N.. Power machine or vehicle with power management. USP2014058718878.
  14. Guven,Mustafa K.; Kuras,Brian D.; Vanderham,Michael E.. Predictive load management system. USP2006127146263.
  15. Henninger Michael,DEX ; Berberich Reinhold,DEX. Process and system for controlling an electrohydraulic pressure supply for an auxiliary power device for an automotive. USP1999055900704.
  16. Rodrigues, Victor. Radial hydraulic pump with a variable eccentricity and delivery. USP2015119194380.
  17. Mestieri Renzo (King City CAX). Radial piston hydraulic motor with rotary cam position encoder and valve control system. USP1990084945816.
  18. Shibayama Takashi (Chigaskai JPX) Sugano Kazuhiko (Yokohama JPX). Regulator valve for hydraulic control system including variable displacement pump. USP1986124632638.
  19. Schottler Joseph Julius ; Hall C. Kells. Speed sensing device. USP1999085933795.
  20. McLevige Daniel J.. Variable displacement pump fuel metering system and electrohydraulic servo-valve for controlling the same. USP2000086102001.
  21. Weichbold, Peter; Tratnig, Robert. Wind energy converter comprising a superposition gear. USP2012048154143.