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특허 상세정보

Apparatus and method of detecting a leak in an evaporative emissions system

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G01M-003/26   
미국특허분류(USC) 73/405R ; ; 73/492 ; ; 73/497
출원번호 US-0511331 (1995-08-03)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 21  인용 특허 : 19
초록

A apparatus and method of detecting a leak in an evaporative emissions system measures vapor flow out of the evaporative emissions system while maintaining a zero pressure difference from inside a fuel tank to atmosphere and provides a reference vapor flow variable dependent on the measurement (317). A pressurized vapor and leak flow variable is measured (323) dependent on measured vapor flow out of the evaporative emissions system while maintaining a pressure difference of 10″of water from inside the fuel tank to atmosphere. A leak is indicated (327) if...

대표
청구항

A method of detecting a leak in an evaporative emissions system for a vehicle, the method comprising the steps of: measuring vapor flow out of the evaporative emissions system while maintaining a substantially zero pressure difference from inside a fuel tank to atmosphere and providing a reference vapor flow variable dependent on the measurement; measuring vapor flow out of the evaporative emissions system while maintaining another pressure difference from inside the fuel tank to atmosphere and providing a pressurized vapor and leak flow variable depende...

이 특허에 인용된 특허 (19)

  1. Janitz Bernt (Dilling NOX). Device for testing of containers as to leakage or defects. USP1987114708014.
  2. Covington ; Morris T. ; Griffin ; Steven M.. Electronic fluid pipeline leak detector and method. USP1978054091658.
  3. Covington Morris T. (Houston TX) Griffin Steven M. (Houston TX). Electronic fluid pipeline leak detector and method. USP1977034012944.
  4. Covington Morris T. (Houston TX) Griffin Steven M. (Houston TX). Electronic fluid pipeline leak detector and method. USP1979034144743.
  5. Stocker Herbert B. (Seeheim IL DEX) Deutsch Robert W. (Sugar Grove IL). Engine control system. USP1987044660519.
  6. Jouve Philippe (Pontacq FR). Fluid leak detection process and installation. USP1976063962905.
  7. Gates Donald C. (Troy MI). Fuel tank leak detection apparatus. USP1988124791805.
  8. Sawatani Teruo (Shizuoka JPX). Jig for leak check. USP1990034905501.
  9. Kawamura Katsuhiko (Yokohama JPX) Matsuno Osamu (Ebina JPX) Kishimoto Yoichi (Chigasaki JPX). Leak diagnosis system for evaporative emission control system. USP1995045408866.
  10. Fukuda Akira (Tokyo JPX). Leakage test method and apparatus. USP1991024993256.
  11. Bergstrand Gunnar Magnus (Stangholmsbacken 56 Skarholmen SW). Means for testing containers for leakage. USP1977034012945.
  12. Tagesson Leif (Gothenburg SEX). Method and a device for detecting leakage of a tube section. USP1987054663962.
  13. Hill Wayne E. (Bucyrus KS) McEachern Dennis (Concord NC). Method and apparatus for detecting leakage in fuel storage and delivery systems. USP1989104876530.
  14. Converse ; III Vernon G. (Franklin MI) Bordato James M. (Grosse Pointe Wds. MI) Bott Theodore R. (Berkley MI) Foerster ; Jr. Charles E. (Northville MI) Herbst ; Jr. Desra N. (Spring Valley OH) Mudge . Method and apparatus for electronic leak testing. USP1986054587619.
  15. Gates Donald C. (Troy MI). Method and apparatus for leak testing a fluid containing chamber. USP1989084854158.
  16. Gastaldo ; Remo ; Melchior ; Ettore. Method and automatic device for the testing of tight cavities. USP1978034078421.
  17. Williams David (Warwickshire GB2) Briscoe Stuart M. (Wolverhampton GB2) Melbourne Keith (Perth AUX). Method of and apparatus for detecting fuel system leak. USP1995115467641.
  18. Gilliam Leslie (10101 Giles Rd. Santa Fe TX 77510). Smoke generating apparatus and method for in situ vacuum leak detection. USP1992045107698.
  19. Mellits Kirk E. (Racine WI) Braun Robert D. (Kenosha WI) Wollert Gary S. (Kenosha WI). Vehicular pressure-testing apparatus. USP1993025187974.

이 특허를 인용한 특허 피인용횟수: 21

  1. Cook John E.,CAX ; Perry Paul D.,CAX ; Terek Paul V.,CAX. Automotive evaporative emission leak detection system and method. USP2000016016690.
  2. Martus, Charles R.; Hawkins, Janet L.; Beneker, Gerrit V.. Combination solenoid operated flow control and shut-off valve with pressure transducer. USP2004066742537.
  3. Kim, Hyun Ki; Kim, Hyun Shik; Oh, Ju Young; Choi, Byeong Un; Lee, Jung Sun; Lim, Jong Soo. Device for inspecting canister for vehicle. USP2017089739683.
  4. Kawamura Katsuhiko,JPX ; Kawano Akihiro,JPX. Diagnosis for evaporative emission control system. USP2001056227037.
  5. Schwegler Helmut,DEX ; Zimmermann Manfred,DEX. Diagnostic module for testing the tightness of a container. USP2001026182502.
  6. Wong, Kevin C.; Western, William. Engine off natural vacuum leakage check for onboard diagnostics. USP2003046550316.
  7. Takashi Isobe JP; Takashi Yamaguchi JP; Satoshi Kiso JP. Evaporated fuel treatment apparatus for internal combustion engine. USP2002036354143.
  8. Stephen F. Majkowski ; Kenneth M. Simpson. Evaporative emission leak detection method with vapor generation compensation. USP2002056382017.
  9. Guo, Yichao; Kowalkowski, Janean. Fuel cap detection system. USP20190110173520.
  10. Reddy Sam Raghuma. Fuel reid vapor pressure estimation. USP1999035884610.
  11. Dudar, Aed M.; Yang, Dennis Seung-Man; Ognjanovski, Jr., Rob. Fuel system leak check based on fuel reid vapor pressure. USP2016109458801.
  12. Pearce, Russell Randall; Bohr, Scott A.; Dudar, Aed M.; Yang, Dennis Seung-Man. Leak detection based on fuel level. USP2015079091227.
  13. Garman Benjamin D. ; Albers Jeffrey Maurice ; Merrell Robert James. Method and apparatus for detecting vapor leakage. USP2000126158270.
  14. Jan Muller SE; Peter .ANG.lleving SE. Method and device for leakage testing in a tank system. USP2002046374663.
  15. Han, Kung-don; Kim, Young-ki; Kim, In. Method of automatically inspecting internal gas leak and method of manufacturing LED chip. USP20180910066789.
  16. Dudar, Aed M.; Mullins, John. Methods and systems for fuel level indicators in a saddle fuel tank. USP2017119829370.
  17. Streib, Martin; Lederle, Karl Bernhard; Pfeil, Michael. Procedure to diagnose a leak in the fuel tank in a fuel tank ventilation system. USP2009097584651.
  18. Dawson, Gary D.; Blomquist, William B.; Booms, Chris J.; Kanafani, Fadi S.. Small/gross leak check. USP2003036530265.
  19. Jon L. Hulsebus. Smoke-producing apparatus for detecting leaks. USP2002116477890.
  20. Dudar, Aed M.; Yang, Dennis Seung-Man; Pearce, Russell Randall. System and methods for a leak check module comprising a reversible vacuum pump. USP2017119822737.
  21. Dudar, Aed M.; Yang, Dennis Seung-Man; Pearce, Russell Randall; Aghili, Mohammad R.. Systems and methods for reducing bleed emissions. USP2017069677512.