[특허]Fuel injection method and device for engines

[미국특허] Fuel injection method and device for engines 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-051/00
출원번호	US-0157955 (1998-09-22)
우선권정보	JP-0277974 (1997-09-26)
발명자 / 주소	Nishiyama Yasuhiro,JPX
출원인 / 주소	Isuzu Motors Limited, JPX
대리인 / 주소	Browdy and Neimark
인용정보	피인용 횟수 : 29 인용 특허 : 4

초록 ▼

This invention determines the output timing of the injection command signal to each of the injectors so that the fuel injection timing agrees with the basic target injection timing even when there are variations in the fuel injection timing among the injectors, and thereby improves the exhaust emission performance of the engine. The time T.sub.2 of an intersection between the straight line Lp representing an average Pa of the common rail pressure before it starts to fall and the first-degree approximation straight line Ld having a maximum inclination of fall of the common rail pressure is determined as the timing at which the common rail pressure starts to fall. Based on the time T.sub.2 and the average pressure Pa, the delay time .DELTA.Td which elapses from the output timing T.sub.0 of the injection command signal to each of the injectors to the actual fuel injection timing T.sub.1 is calculated. The output timing T.sub.0 for the injection command signal is determined as an instant the delay time .DELTA.Td before the basic target injection timing Tb, which is determined from the operating state.

대표청구항 ▼

[ What is claimed is:] [1.] A fuel injection method for engines comprising the steps of:storing fuel delivered by a fuel pump in a common rail;injecting the fuel from the common rail into combustion chambers through nozzle holes formed in injectors driven by an injection command signal;selecting a basic target injection timing corresponding to a present engine operating state from among predetermined basic target injection timing data as related to engine operating states;determining, by using a predetermined function having as variables at least a timing after the start of fuel injection at which the common rail pressure starts to fall, an injection delay time that elapses from an output timing of the injection command signal to a fuel injection timing at which the fuel injection from each of the injectors is started; anddetermining the output timing of the injection command signal from the basic target injection timing and the injection delay time;wherein, using a graph with time and the common rail pressure as coordinate axes, the timing at which the common rail pressure starts to fall due to fuel injection is determined as a time coordinate of an intersection between a straight line approximating a common rail pressure falling curve before reaching a first minimal value and a straight line approximating the common rail pressure before the start of fuel injection.

이 특허에 인용된 특허 (4) 인용/피인용 타임라인 분석

Willey Raymond L. (Redford MI) Vermiglio Ezio N. (Belleville MI), Gaseous fuel injection control system using averaged fuel pressure compensation.
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Fort Leonard N. (Burton WA) Albert Albert F. (Bellevue WA) Darragh Edward P. (Kent WA), High constant pressure, electronically controlled diesel fuel injection system.
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Glidewell John M. (Dearborn MI) Chui Granger K.-C. (Dearborn Heights MI) Yang Woong-Chul (Ann Arbor MI), On-board detection of fuel injector malfunction.
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Beck Niels J. (Bonita CA) Calkins Michael A. (El Cajon CA) Weseloh William E. (San Diego CA) Barkhimer Robert L. (Chula Vista CA), Pressure-controlled fuel injection for internal combustion engines.
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이 특허를 인용한 특허 (29) 인용/피인용 타임라인 분석

Fujii, Hiroto, Accumulator fuel injection apparatus compensating for injector individual variability.
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Minato Akihiko,JPX, Common-rail fuel-injection system.
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Nishimura Terukazu,JPX, Common-rail fuel-injection system.
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Takase Shigehisa,JPX, Common-rail fuel-injection system.
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Cooper, Jared Klineman; Kraeling, Mark Bradshaw; Eldredge, David Allen; Brooks, James; Kumar, Ajith Kuttannair, Control system and method for remotely isolating powered units in a vehicle system.
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Yomogida, Koichiro; Nakano, Futoshi; Saigo, Yusuke; Sasaki, Yuji, Filter processing device for detecting values of common rail pressure and common rail fuel injection control device.
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Eckerle, Wayne A.; Temple, Ron H.; Peters, Lester L., Fuel delivery device and fuel delivery system.
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Nobuhiko Shima JP; Takashi Kikutani JP; Hitoshi Kato JP, Fuel injection apparatus for internal combustion engine.
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Imai, Minoru; Yamada, Naoyuki, Fuel injection detecting device.
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Yamada, Naoyuki; Ishizuka, Koji, Fuel injection detecting device.
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Ishizuka,Koji; Fukushima,Takayuki; Kikutani,Takashi, Fuel injection system.
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Norihisa Fukutomi JP; Osamu Matsumoto JP; Masayuki Aota JP, Fuel injection system.
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Nishiyama Yasuhiro,JPX, Fuel-injection system for engine and process for defining the beginning of pressure drop in common rail.
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Yasuhiro Nishiyama JP, Fuel-injection system for engine and process for defining the beginning of pressure drop in common rail.
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Nakata, Kenichiro; Ishizuka, Koji, Injection control device of internal combustion engine.
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Giuseppe Domenico Suffredini ; Mark Thomas Linenberg ; Ralph Wayne Cunningham, Method and apparatus for determining fuel pressure.
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Lannutti, John J., Method for detecting density gradients.
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Melis, Massimiliano; Allasia, Matteo; Rampino, Vincenzo, Method for estimating an hydraulic dwell time between two injection pulses of a fuel injector.
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Pelizzoni, Ivan; Cancellieri, Angelo, Method for estimating an instantaneous pressure value in a fuel line of a fuel injection system.
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Jaliwala, Salim A.; Lukich, Michael S.; Schuricht, Scott R.; Sankar, Rammohan, Method for estimating fuel injector performance.
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Li, Hui; Kerekgyarto, Janos, Method for regulating a fuel injection system of an internal combustion engine.
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Cooper, Jared Klineman; Golden, Samuel William; Noffsinger, Joseph Forrest; Kumar, Ajith Kuttannair; Plotnikov, Yuri Alexeyevich; Fries, Jeffrey Michael; Ehret, Steven Joseph; Nagrodsky, Nicholas David, Route examination system and method.
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Plotnikov, Yuri Alexeyevich; Matthews, Brett Alexander; Kumar, Ajith Kuttannair; Fries, Jeffrey Michael; Noffsinger, Joseph Forrest; Poonacha, Samhitha Palanganda; Frangieh, Tannous; Wheeler, Frederick Wilson; Staton, Brian Lee; Brown, Timothy Robert; Boverman, Gregory; Nayeri, Majid, Route examining system and method.
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Gallagher, Shawn Michael; Primus, Roy; Tamma, Bhaskar; Topinka, Jennifer, System and method for controlling the fuel injection event in an internal combustion engine.
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Kumar, Ajith Kuttannair; Eldredge, David; Ballesty, Daniel; Cooper, Jared Klineman; Roney, Christopher; Houpt, Paul; Mathe, Stephen; Julich, Paul; Kisak, Jeffrey; Shaffer, Glenn; Nelson, Scott; Daum, Wolfgang, System and method for vehicle control.
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Martin,Steffen; Peacock,Ryan; Straub,Robert, System and method to control spool stroke motion.
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Otsubo, Tom; Daum, Wolfgang; Stull, Craig Alan; Hann, Gregory; Danner, Phillip, System, method and computer software code for determining a mission plan for a powered system using signal aspect information.
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Cologna, Chris M., Systems and methods for using secondary fuels.
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Kumar, Ajith Kuttannair; Shaffer, Glenn Robert; Houpt, Paul Kenneth; Movsichoff, Bernardo Adrian; Chan, David So Keung; Eker, Sukru Alper, Trip optimization system and method for a train.
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[미국특허] Fuel injection method and device for engines 원문보기

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[미국특허] Fuel injection method and device for engines 원문보기

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