[특허]Common-rail fuel injection system for an engine

Common-rail fuel injection system for an engine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02B-077/00 F02M-041/00
출원번호	US-0842544 (1992-02-27)
우선권정보	JP-0033217 (1991-02-27)
발명자 / 주소	Osuka Isao (Nagoya JPX) Matsumura Toshimi (Aichi JPX)
출원인 / 주소	Nippondenso Co., Ltd. (Kariya JPX 03)
인용정보	피인용 횟수 : 44 인용 특허 : 0

초록 ▼

A common-rail fuel injection system for an engine includes a fuel injection device for injecting high pressure fuel from a common rail into the engine. A pumping chamber is connected to the common rail. A fuel feed device serves to feed fuel to the pumping chamber. A plunger moves upward and downward in accordance with rotation of an output shaft of the engine. The plunger defines a part of the pumping chamber. A relief valve serves to selectively return fuel from the pumping chamber to a low pressure side via a fuel return passage. The relief valve is urged toward its closed position by a pressure of the fuel in the pumping chamber. A valve closing device serves to close the relief valve. A fuel pumping control device serves to drive and control the valve closing device at a given timing to close the relief valve, thereby enabling a pressure in the pumping chamber to increase in accordance with upward movement of the plunger and pumping a given amount of fuel from the pumping chamber to the common rail. An engine speed detecting device serves to detect a rotational speed of the output shaft of the engine. In cases where an engine rotational speed detected by the engine speed detecting means is equal to or higher than a predetermined reference speed, a fuel feed suspending device serves to suspend fuel feed to the pumping chamber by the fuel feed means.

대표청구항 ▼

A common-rail fuel injection system for an engine, comprising: fuel injection means for injecting high pressure fuel from a common rail into a engine; a pumping chamber connected to the common rail; fuel feed means for feeding fuel to the pumping chamber; a plunger, operatively connected so as to move with rotation of an output shaft of the engine, movable within the pumping chamber; a relief valve for selectively returning fuel from the pumping chamber to a low pressure fuel chamber via a fuel return passage, and for selectively introducing fuel from the low pressure fuel chamber to the pumping chamber, the relief valve being urged toward its closed position by a pressure of the fuel in the pumping chamber; valve closing means for closing the relief valve when the valve closing means is energized; fuel pumping control means for driving and controlling the valve closing means at a given timing to close the relief valve, thereby enabling a pressure in the pumping chamber to increase in accordance with a first movement of the plunger, and for pumping a given amount of fuel from the pumping chamber to the common rail; engine speed detecting means for detecting a rotational speed of the output shaft of the engine; first fuel supply suspending means for suspending a fuel supply to the common rail by continuously driving the valve closing means in a de-energized condition when the engine rotational speed detected by said engine speed detecting means is lower than a predetermined reference speed; and second fuel supply suspending means for suspending a fuel supply to the common-rail by continuously driving the valve closing means in an energized condition when the engine rotational speed detected by said engine speed detecting means is equal to or higher than a predetermined reference speed.

이 특허를 인용한 특허 (44)

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John T. Carroll, III ; Donald J. Benson ; Yul J. Tarr IN; Laszlo D. Tikk ; Taner Tuken, Cyclic pressurization including plural pressurization units interconnected for energy storage and recovery.
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Espey Christoph,DEX, Fuel injection system for a multicylinder internal combustion engine with a fuel supply line serving as high pressure storage device.
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Klinger Horst,DEX ; Kuhn Uwe,DEX ; Rosenau Bernd,DEX ; Traub Peter,DEX ; Loesch Gerd,DEX ; Soccol Sandro,DEX, Fuel injector.
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Kikutani,Takashi; Endo,Hisashi, Fuel pressure controller.
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Ryuzaki, Koutaro, Fuel pump and fuel feeding device using the fuel pump.
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Borg, Jonathan; Badarinarayan, Harsha; McCune, Donald J.; Watanabe, Atsushi; Shiraishi, Takuya; Saikalis, George, Fuel pump control for a direct injection internal combustion engine.
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Shafer, Scott F.; Wang, Lifeng, Fuel pumping system and method.
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Shafer,Scott F.; Wang,Lifeng, Fuel pumping system and method.
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Tokuo, Kenichiro; Hiraku, Kenji; Nogami, Tadahiko; Takao, Kunihiko; Yamada, Hiroyuki, Fuel supply apparatus and method of control thereof.
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Wang,Xiumei, Fuel supply device of an internal combustion engine.
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Yoshimura, Tetsuya, Fuel supply pump.
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Miyashita, Shigeki, Fuel supply system for internal combustion engine.
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Hori, Yasuyoshi, Fuel supply system of internal combustion engine.
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Thomas Eric D. ; Weisman ; II S. Miller, Method and system for controlling fuel pressure in a common rail fuel injection system.
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Ausiello,Francesco; Serra,Gabriele, Method for the direct injection of fuel into an internal combustion engine.
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Gibson,Dennis H., Multi-source fuel system for variable pressure injection.
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Gibson,Dennis H.; Sommars,Mark F.; Sun,Jinhui, Multi-source fuel system for variable pressure injection.
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Gibson,Dennis H., Multi-source fuel system having closed loop pressure control.
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Gibson,Dennis H., Multi-source fuel system having grouped injector pressure control.
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Thomas, Eric D., System and method for controlling fuel injections.
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Gallagher,Shawn Michael, System and method for controlling locomotive smoke emissions and noise during a transient operation.
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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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Thompson Scott A. (Columbus IN) Daiker Jeffrey (Columbus IN) Stavnheim Jonathon A. (Columbus IN) Meyer William (Columbus IN) Fridholm Greg (Columbus IN) Sang Zhong (Columbus IN) Studtman George (Mt. , System and methods for electronic control of an accumulator fuel system.
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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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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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