[특허]Fuel vapor leak detection system

Fuel vapor leak detection system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-033/02
출원번호	US-0205983 (1994-03-04)
발명자 / 주소	Cook John E. (Chatham CAX) Perry Paul D. (Chatham CAX)
출원인 / 주소	Siemens Electric Limited (Chatham CAX 03)
인용정보	피인용 횟수 : 63 인용 특허 : 0

초록 ▼

Leakage from a portion of a canister purge system which includes a fuel tank and a vapor collection canister is detected by closing off that portion and then positively pressurizing it by means of an air pump. The air that is pumped by the air pump is split into two separate paths, one to pressurize the closed-off portion of the system, and the other to flow through a known orifice. A differential flow meter compares the flow through one path with that through the other to determine if there is leakage.

대표청구항 ▼

A canister purge system comprising a collection canister for collecting volatile fuel vapors from a fuel tank, and means for selectively purging collected fuel vapors from said canister to an internal combustion engine\s intake manifold for entrainment with a combustible mixture that passes from the intake manifold into combustion chamber space of the engine for combustion therein, said means including a purge flow path between a purge port means of said canister and the intake manifold, said canister further having tank port means for communicating said canister with said fuel tank, characterized by an associated diagnostic system for detecting leakage from a portion of the canister purge system, including said canister and tank, when said portion is closed to conduct a leakage test, said diagnostic system comprising pump means for positively pressurizing said portion by conducting a first portion of the pump means flow through a first flow path from said pump means to said portion of the canister purge system and concurrently conducting a second portion of the pump means flow from said pump means through a second flow path containing a known orifice means, means for detecting the flow differential between that first portion of the pump means flow passing through said first flow path and that second portion of the pump means flow passing through said second flow path, and means for determining the leakage from the detected flow differential.

이 특허를 인용한 특허 (63)

Pursifull, Ross Dykstra, Airflow generating device for alternator cooling and vapor canister purging.
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Miwa Makoto,JPX ; Isomura Shigenori,JPX ; Muramatsu Toshihiko,JPX ; Minagawa Kazuji,JPX ; Matsuda Takeshi,JPX ; Kato Takahiko,JPX, Antidissipation apparatus for evaporated fuel vapor.
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Shigeo Ohkuma JP, Apparatus and method for diagnosing leakage in fuel vapor treatment apparatus.
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Saruwatari Masayuki,JPX ; Furuya Junichi,JPX, Apparatus for processing fuel vapor in internal combustion engine equipped with supercharger.
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Denz Helmut,DEX ; Blumenstooh Andreas,DEX ; Mallebrein George,DEX ; Konzelmann Uwe,DEX, Arrangement and method for checking the tightness of a vessel.
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Cook John E.,CAX ; Perry Paul D.,CAX ; Weldon Craig A.,CAX, Automotive evaporative emission leak detection system.
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Cook, John E.; Perry, Paul D., Automotive evaporative leak detection system.
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Siddiqui, Shahid Ahmed, Automotive fuel system leak testing.
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Paul D. Perry CA; John A. Gurd CA, Connection between an integrated pressure management apparatus and a vapor collection canister.
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Peters, Mark W.; Werner, Matthew; Bohr, Scott A.; Dudar, Aed M., Controlling the closing force of a canister purge valve prior to executing leak diagnostic.
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Weldon, Craig, Diagnostic apparatus and method for an evaporative control system including an integrated pressure management apparatus.
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Perry, Paul; Veinotte, Andre, Electrical connections for an integrated pressure management apparatus.
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Cook John E.,CAX ; Perry Paul D.,CAX ; Terek Paul V.,CAX, Evaporative emission leak detection system.
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Mieczkowski Daniel ; Hasenberg Mark J. ; Becker Thomas P. ; Crass Matthew M. ; Braun Robert D. ; Gisske Edward T. ; Caldwell Donald J., Evaporative emission tester.
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Mieczkowski Daniel ; Hasenberg Mark J. ; Becker Thomas P. ; Crass Matthew M. ; Braun Robert D. ; Gisske Edward T. ; Caldwell Donald J., Evaporative emission tester.
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Dekar, Joseph; Sager, Roger C; Daley, James J; Blomquist, William B; Wuttke, Jeffrey P; Wakeman, Russell J; Fleischman, Adam; Yannone, Jr., Ronald A; Del Rio, Luis; Lott, Mark L; Baker, Edward; Vincent, Michael T; Yang, Wei-Jun; Tsahalou, Aikaterini, Evaporative emissions control system including a purge pump and hydrocarbon sensor.
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Matsuoka Hiroki (Susono JPX) Nakagawa Norihisa (Numazu JPX), Evaporative fuel control device.
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Kano,Masao; Takakura,Shinsuke; Amano,Noriyasu, Evaporative fuel treatment apparatus.
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Takaku Yutaka,JPX ; Ishii Toshio,JPX ; Kawano Kazuya,JPX ; Kurihara Nobuo,JPX ; Kimura Hiroshi,JPX ; Miura Kiyoshi,JPX, Evaporative system and method of diagnosing same.
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Takaku Yutaka,JPX ; Ishii Toshio,JPX ; Kawano Kazuya,JPX ; Kurihara Nobuo,JPX ; Kimura Hiroshi,JPX ; Miura Kiyoshi,JPX, Evaporative system and method of diagnosing same.
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Paul D. Perry CA, Fluid flow through an integrated pressure management apparatus.
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Perry, Paul D., Fluid flow through an integrated pressure management apparatus.
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Docy Michael J. ; Hart George R. ; Bauman Robert L., Fuel cap tester.
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Perry,Paul D.; Cook,John E., Fuel system with integrated pressure management.
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Paul D. Perry CA; John E. Cook CA, Fuel system with intergrated pressure management.
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Mitani,Tateki; Kanamaru,Shigeki; Yoshioka,Hiroshi; Ishii,Kazushi, Fuel vapor leak detecting apparatus, and fuel supplying apparatus to be applied to the same.
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Amano,Noriyasu; Kato,Naoya; Kano,Masao; Takakura,Shinsuke, Fuel vapor treatment apparatus.
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Amano, Noriyasu; Kawano, Takanobu; Inagaki, Koichi; Koyama, Nobuhiko; Kano, Masao; Takakura, Shinsuke; Yamada, Yoshichika, Fuel vapor treatment system for internal combustion engine.
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Amano,Noriyasu; Kawano,Takanobu; Inagaki,Koichi; Koyama,Nobuhiko; Kano,Masao; Takakura,Shinsuke; Yamada,Yoshichika, Fuel vapor treatment system for internal combustion engine.
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Perry, Paul D., Housing for an integrated pressure management apparatus.
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Paul D. Perry CA, Housing for integrated pressure management apparatus.
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Dudar, Aed M.; Peters, Mark W.; Yang, Dennis Seung-Man, Hybrid vehicle fuel system leak detection.
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Dekar, Joseph; Sager, Roger C; Daley, James J; Blomquist, William B; Wuttke, Jeffrey P; Wakeman, Russell J; Fleischman, Adam; Yannone, Jr., Ronald A; Del Rio, Luis; Lott, Mark L; Baker, Edward; Vincent, Michael T; Yang, Wei-Jun; Tsahalou, Aikaterini, Hydrocarbon vapor start techniques using a purge pump and hydrocarbon sensor.
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Perry, Paul D., Integrated pressure management apparatus having electronic control circuit.
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Paul D. Perry CA, Integrated pressure management apparatus providing an on-board diagnostic.
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Paul D. Perry CA; John E. Cook CA, Integrated pressure management system for a fuel system.
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Perry, Paul D.; Cook, John E., Integrated pressure management system for a fuel system.
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Perry,Paul D.; Cook,John E., Integrated pressure management system for a fuel system.
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Okuma Shigeo,JPX, Method and apparatus for diagnosing leakage of fuel vapor treatment unit.
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Kohn,Bruce R, Method and apparatus for testing vehicle fuel system integrity.
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Streib, Martin, Method and arrangement for checking the tightness of a vessel.
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Paul D. Perry CA; John E. Cook CA, Method of calibrating an integrated pressure management apparatus.
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Blomquist William B. ; Dawson Gary D. ; Richardson Roland T. ; Tallarek Glen ; Letcher John E. ; Hope Mark E., Method of leak detection during low engine vacuum for an evaporative emission control system.
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Perry,Paul D.; Cook,John E., Method of managing pressure in a fuel system.
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Dudar, Aed M.; Jentz, Robert Roy; Pearce, Russell Randall; Bohr, Scott A., Passive venturi pump for leak diagnostics and refueling.
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Perry,Paul; Veinotte,Andre, Poppet for an integrated pressure management apparatus and fuel system and method of minimizing resonance.
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Paul D. Perry CA, Pressure operable device for an integrated pressure management apparatus.
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Streib, Martin; Lederle, Karl Bernhard; Pfeil, Michael, Procedure to diagnose a leak in the fuel tank in a fuel tank ventilation system.
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Perry Paul Douglas,CAX, Self-contained leak detection module having enclosure-mounted toggle levers for pump and valve.
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Perry, Paul D., Sensor arrangement for an integrated pressure management apparatus.
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Weldon, Craig, Sensor arrangement for an integrated pressure management apparatus.
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Paul D. Perry CA, Solenoid for an integrated pressure management apparatus.
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Sugino,Masayoshi; Amano,Noriyasu; Takakura,Shinsuke, State measuring apparatus and operation control method for the same.
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Herzog, Michael; Smith, Gordon Ernest; Sulik, Charles Michael; Pandey, Arun R.; Shishkin, Valeriy Maksimovich; Weedon, Rex Graham; Davis, Mark, System and method for testing fuel tank integrity.
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Herzog,Michael; Smith,Gordon Ernest; Sulik,Charles Michael; Pandey,Arun R.; Shishkin,Valeriy Maksimovich; Weedon,Rex Graham; Davis,Mark, System and method for testing fuel tank integrity.
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Herzog,Michael; Smith,Gordon Ernest; Sulik,Charles Michael; Pandey,Arun Raj; Shishkin,Valeriy Maksimovich; Weedon,Rex Graham; Davis,Mark A., System and method for testing fuel tank integrity.
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Heinemann Joachim,DEX ; Fiedler Uwe,DEX ; Meinig Uwe,DEX, Tank venting device for motor vehicles.
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Sager, Roger C; Blomquist, William B; Daley, James; Tsahalou, Aikaterini; Yannone, Jr., Ronald A; Del Rio, Luis; Lott, Mark L; Dekar, Joseph, Techniques for monitoring purge flow and detecting vapor canister leaks in an evaporative emissions system.
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Cook, John E.; Perry, Paul D., Temperature correction method and subsystem for automotive evaporative leak detection systems.
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Cook,John E.; Perry,Paul D., Temperature correction method and subsystem for automotive evaporative leak detection systems.
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Carter, Rodney, Testing vapor recovery systems.
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Pursifull, Ross Dykstra, Vacuum supply system.
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Pursifull, Ross Dykstra, Vacuum supply system.
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