[특허]High-pressure dual-feed-rate injector pump with auxiliary spill port

[미국특허] High-pressure dual-feed-rate injector pump with auxiliary spill port 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-037/04 F02M-041/08
출원번호	US-0058339 (1998-04-10)
발명자 / 주소	DeLuca Frank
출원인 / 주소	Buescher Alfred J.
대리인 / 주소	Pearne, Gordon, McCoy & Granger LLp
인용정보	피인용 횟수 : 3 인용 특허 : 27

초록 ▼

A diesel fuel injector is provided with a secondary spill aperture operable to increase to a maximum value and then decrease to zero during an early part of the injection portion of the stroke of the injector pump plunger in a manner to maintain injection pressure at relatively high levels at the beginning of such injection portion of the plunger stroke whereas the rate of injection is lower during such early part of such injection portion than it would be in the absence of said secondary spill aperture.

대표청구항 ▼

[ What is claimed is:] [1.] A diesel injector for injecting diesel fuel into an engine chamber in a controlled manner, said injector being of the type including a sleeveless pump comprising a two-piece lengthwise-extending pressure-containing plunger-and-bushing subassembly including a pump bushing and a pump plunger sliding in said bushing,a pump chamber at the distal end of said plunger adapted to contain fuel under low pressure prior to the pump stroke of said pump,said pump plunger being reciprocable in the pump bushing for pressurizing fuel in the pump chamber with a pump stroke having predefined rates of displacement along the stroke length to force a discharge of fuel under pressure, and to force said pressurized fuel from the chamber to open and pass an injection valve during an injection portion of the pump stroke,means for controlling the length of said injection portion of the pump stroke, said means for controlling including a port-closing edge and a port-opening edge associated with ports opening into the plunger-receiving bore of said bushing, said two edges having different helix angles, not excluding a helix angle of zero for one of them, whereby the interval between port closing and port opening in each pumping stroke is increased as the angular position of the plunger and said edges around the axis of the plunger is adjusted throughout a range of adjustment to increase the injection portion of the pump stroke throughout a corresponding range of engine loads,secondary spill means for providing secondary spilling of fuel from said chamber during a secondary spill period, which overlaps the early part of said injection portion of said pump stroke, said secondary spill means including a secondary spill aperture defined by an interacting pair of openings associated respectively with the bore of said pump bushing and the periphery of said plunger, said opening associated with the periphery of said plunger comprising a groove extending generally at a helix angle, zero or greater, similar to that of said port-closing edge, said groove extending around the periphery of said plunger an angular extent corresponding to the peripheral extent of at least a portion of said port-closing edge, said pair of openings opening to the interface between said plunger and said pump cylinder,said secondary spill aperture performing said secondary spilling such that spilling through said secondary spill aperture is initiated at or shortly after initiation of said injection portion of said pump stroke throughout at least a portion of said range of engine loads, the range through which increases or decreases in engine load are associated with corresponding increases or decreases in said interval, whereby, throughout said at least a portion of said range of engine loads, fuel injection at pressures substantially undiminished from what they would be without said secondary spilling characterizes the beginning of said injection portion of said pump stroke while at the same time the average fuel feed rate past said injection valve during said early part of said injection portion of said pump stroke is reduced from what it would be without said secondary spilling.

이 특허에 인용된 특허 (27) 인용/피인용 타임라인 분석

Frnkle Gerhard (Remshalden DEX) Hase Friedrich-Wilhelm (Stuttgart DEX), Control member for fuel injection devices.
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Ament Frank (Rochester MI), Diesel fuel injection pump secondary fuel metering control system.
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Bader ; Jr. ; Ernest ; Deckard ; John I. ; Kuiper ; Dan B., Electromagnetic unit fuel injector.
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Deckard John I. (Grand Rapids MI), Electromagnetic unit fuel injector.
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Deckard John I. (Grand Rapids MI) Straub Robert D. (Livonia MI), Electromagnetic unit fuel injector.
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Deckard John I. (Grand Rapids MI) Straub Robert D. (Livonia MI), Electromagnetic unit fuel injector.
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Deckard John I. (Grand Rapids MI), Electromagnetic unit fuel injector with differential valve.
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Hofer ; Gerald ; Konrath ; Karl, Fuel injection pump.
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Hofer Gerald (Flacht DT) Konrath Karl (Ludwigsburg DT), Fuel injection pump.
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Kobayashi Masayoshi (Higashi-Matsuyama JPX), Fuel injection pump.
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Richmond James A. (Monson MA) Parent Christopher A. (Holyoke MA), Fuel injection pump.
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Scheying Heinz (Stuttgart DEX), Fuel injection pump for air-compressing fuel injected internal combustion engines.
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Hatz Ernst (Ruhstorf DEX), Fuel injection pump for an internal combustion engine having pre-injection and main injection.
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Hfer Gerald (Weissach-Flacht DEX), Fuel injection pump for internal combustion engine.
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Eheim ; deceased Franz (late of Stuttgart DEX by Helga Eheim ; heiress) Straubel Max (Stuttgart DEX), Fuel injection pump for internal combustion engines.
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Fehlmann Wolfgang (Stuttgart DEX) Hofer Gerald (Bad Aibling DEX) Junger Dieter (Stuttgart DEX) Stumpp Gerhard (Stuttgart DEX), Fuel injection pump for internal combustion engines.
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Straubel Max (Stuttgart DE), Fuel injection pump for internal combustion engines.
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Camplin Fred A. (Peoria IL) Flinn Michael A. (East Peoria IL) Graves Jeffrey D. (Pontiac IL) Zuo Lianghe (Normal IL), Fuel injection rate shaping apparatus for a unit fuel injector.
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Eckert Konrad (Stuttgart DEX), Fuel injection system for internal combustion engines.
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Askew James M. A. (Brockworth GB3), Injection pump having pilot and main injection.
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Hoecker Manfred (Rosrath DEX), Injection pump with preinjection.
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Perr Julius P. (Columbus IN), Injection rate control injector.
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Hofer Robert (Elgg CHX), Injection system for a valve of a diesel engine.
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Djordjevic Ilija (Windsor CT) Ganser Marco (Granby CT), Modular accumulator injector.
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Ishiwata Hiroshi (Saitama Prefecture JPX) Ohishi Takashi (Saitama Prefecture JPX) Kitahara Nobuhiro (Saitama Prefecture JPX), Pilot injection controller in fuel injection system and method of controlling pilot injection quantity.
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Long Martin W. (Columbus IN) Muntean George L. (Columbus IN) Free Paul D. (Columbus IN), Solenoid operated unit fuel injector with supply line backflow pressure relief valve.
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Ohnishi Masanori (Higashimatsuyama JPX) Kasahara Toshiaki (Higashimatsuyama JPX) Saga Kouichi (Higashimatsuyama JPX) Li Xin-he (Higashimatsuyama JPX), Unit fuel injector.
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이 특허를 인용한 특허 (3) 인용/피인용 타임라인 분석

Mills,Douglas W., Control valve for nitrous oxide injection system.
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Mills,Douglas W., Nitrous oxide and fuel control valve for nitrous oxide injection system.
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Frank DeLuca, Reduce initial feed rate injector with fuel storage chamber.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] High-pressure dual-feed-rate injector pump with auxiliary spill port 원문보기