[특허]Variable displacement high pressure pump for fuel injection systems

Variable displacement high pressure pump for fuel injection systems 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-037/04 F02M-007/00
출원번호	US-0268669 (1994-06-30)
발명자 / 주소	Yen Bai-Mao (Columbus IN) Peters Lester L. (Columbus IN) Perr Julius P. (Columbus IN) Swank Bryan W. (Columbus IN)
출원인 / 주소	Cummins Engine Company, Inc. (Columbus IN 02)
인용정보	피인용 횟수 : 58 인용 특허 : 0

초록 ▼

A variable displacement high pressure pump having a plurality of high pressure pumping units which receive fuel from a low pressure fuel pump. A rotary cam-driven roller tappet, for producing pumping displacement of the pumping plunger of a respective pumping element, is connected to the pumping plunger by a separated link in a manner permitting the pumping plunger to float relative to the roller tappet during at least a portion of each pumping cycle. As a result, the capacity of the pumping chamber can be limited to an extent that is less than the full stroke achievable by the pumping plunger being retracted to the maximum extent which is permitted by the driving cam. In this way, the quantity of fuel to be pressurized and injected into the common rail does not have to be determined by a cutting-off of a spilling flow of excess metered fuel during the compression stroke of the pumping plunger, so that a low pressure solenoid valve can be used, in the case of time-stroke and time-pressure metering, and no solenoid is required to control metering in the case of pressure-time metering.

대표청구항 ▼

A variable displacement high pressure pump for supplying fuel to a common rail fuel injection system having a plurality of fuel injectors connected to a common Eel supply rail, said high pressure pump comprising a low pressure pump having an outlet which is connected to a fuel supply inlet of each of a plurality of high pressure pumping elements; wherein each of the pumping elements has a pumping plunger that is mounted for reciprocation in a bore; wherein a variable volume pumping chamber, into which fuel from said low pressure pump is metered via said fuel supply inlet, is formed in said bore between an end of the pumping plunger and an outlet of the pumping element through which fuel pressurized by said pumping plunger is supplied to a common rail of a common rail fuel injection system; and wherein a rotary cam-driven roller tappet for producing pumping displacement of the pumping plunger is connected to each pumping plunger by a separated link in a manner permitting the pumping plunger to float relative to the roller tappet during at least a portion of each pumping cycle.

이 특허를 인용한 특허 (58)

Otani, Tomohiro; Adachi, Hitoshi; Kotou, Fumiya; Shiomi, Hideo, Accumulator-type fuel injection apparatus and internal combustion engine provided with that accumulator-type fuel injection apparatus.
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Kasen Jon E. ; Ausman Thomas G., Adaptive control for power growth in an engine equipped with a hydraulically-actuated electronically-controlled fuel injection system.
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Bellistri, James T.; Hajji, Mazen A., Apparatus and process for controlling operation of an internal combustion engine having an electronic fuel regulation system.
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Carroll, III, John T.; Benson, Donald J.; Tarr, Yul J.; Tikk, Laszlo D.; Tuken, Taner, Cyclic pressurization including plural pressurization units interconnected for energy storage and recovery.
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Hu, Guangdi; Sun, Shaojun; Tong, Dehui, Device and method for controlling high-pressure common-rail system of diesel engine.
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Miyajima Masayasu,JPX, Fuel feeding device.
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Susumu Takahashi JP; Masaaki Nishitou JP, Fuel injection control device for engines.
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Moser Franz X.,DEX, Fuel injection device for auto-ignition internal combustion engines.
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Scheurer,Hans Peter; Steinbach,Timo, Fuel injection system.
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Wirbeleit Friedrich (Esslingen DEX) Lehner Wolfgang (Esslingen DEX) Raab Alois (Aalen DEX), Fuel injection system for an internal combustion engine.
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Isozumi Shuzo (Tokyo JPX) Morikaku Hideki (Tokyo JPX), Fuel injector system.
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Nomura,Mitsuhiro; Inoue,Yasumichi, Fuel pressure control device of internal combustion engine.
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Kylström, Kim; Flink, Tomas, Fuel pump and a method for controlling a fuel pump.
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Rosenau Bernd,DEX ; Loesch Gerd,DEX ; Rueckle Markus,DEX, Fuel pump assembly.
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Shaull, Anthony A.; Thayer, Wesley R., Fuel pump for an internal combustion engine.
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Shaull, Anthony A.; Thayer, Wesley R., Fuel pump for an 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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Yoshihiko Onishi JP, Fuel supply apparatus.
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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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Furuhashi Tsutomu,JPX ; Hioki Tomomi,JPX ; Inoue Hiroshi,JPX, Fuel supply apparatus for direct injection type gasoline engine.
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Kubota,Kazuya, Fuel supply device.
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Rembold Helmut,DEX ; Deichsel Hans,DEX ; Stutzenberger Heinz,DEX ; Mueller Uwe,DEX, Fuel supply system and method for operating an internal combustion engine.
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Osborn J. Christopher ; Black John W., High pressure fuel pump assembly.
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Maass, Martin, High pressure fuel pump delivery control by piston deactivation.
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Xu, Na, High-pressure fuel pump actuator used in engine.
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Rembold, Helmut; Schmidt, Bruno; Krieg, Dietmar; Schumacher, Mathias; Mueller, Uwe, High-pressure fuel pump with variable delivery quantity.
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Furusawa Shinya,JPX ; Hashimoto Eiji,JPX, High-pressure fuel supply device for internal combustion engine.
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Lingener, Uwe, High-pressure pump arrangement.
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Hunter, Douglas G.; Jannausch, Matthew J., Hydraulic pump with variable flow and variable pressure and electric control.
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Anderson Michael D. ; Friede Matthew D. ; Gibson Dennis H., Hydraulically-actuated system having a variable delivery fixed displacement pump.
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Anderson Michael D. ; Gibson Dennis H. ; Pickell Michael E. ; Wear Jerry A. ; Friede Matthew D., Hydraulically-actuated system having a variable delivery fixed displacement pump.
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Koivunen, Matti; Friis, Matts; Hägglund, Thomas, Injection pump for a piston engine.
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Steinbrenner, Ulrich; Joos, Klaus; Frenz, Thomas, Method for the operation of a fuel metering system on a direct injection 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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Biester Juergen,DEX ; Kellner Andreas,DEX, Process and device for controlling an internal combustion engine.
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Anderson, Michael D.; Gibson, Dennis H.; Pickell, Michael E.; Wear, Jerry A.; Friede, Matthew D., Pump and hydraulic system with low pressure priming and over pressurization avoidance features.
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De Luca, Alessandro; Minunno, Vincenzo, Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine.
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Josef Guentert DE; Bernd Streicher DE; Kasim-Melih Hamutcu DE, Radial piston pump for high pressure fuel supply.
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Gant Gary L. ; Robinson Brian W. ; Padfield Jon ; Muntean George L., Reprogrammable electronic step timing control system for control of injection timing in a hydromechanical fuel supply system.
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Gibson, Dennis H.; Sommars, Mark F., Sleeve metered unit pump and fuel injection system using the same.
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Shimayama Yoshiro,JPX ; Kimura Haruyo,JPX, Supply pump for common rail fuel injection system.
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Yoshiro Shimayama JP; Haruyo Kimura JP, Supply pump for common rail fuel injection system.
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Vogt, Kevin L.; Sung, Jung-Min C.; Lucas, Michael A., System and method for metering fuel in a high pressure pump system.
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Sommars,Mark F.; Gibson,Dennis H., Variable discharge pump with two pumping plungers and shared shuttle member.
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Hunter,Douglas G.; Koenig,Dennis, Variable displacement pump and control therefor.
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Hunter,Douglas; Koenig,Dennis, Variable displacement pump and control therefore for supplying lubricant to an engine.
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McLevige Daniel J., Variable displacement pump fuel metering system and electrohydraulic servo-valve for controlling the same.
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Hunter, Douglas G.; Haase, Thomas, Variable displacement vane pump with variable target regulator.
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Hunter, Douglas G.; Niemiec, Albin J., Variable displacement vane pump with variable target regulator.
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Hunter, Douglas G.; Niemiec, Albin J., Variable displacement vane pump with variable target regulator.
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A	생활필수품
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Variable displacement high pressure pump for fuel injection systems 원문보기

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