Fuel injection device for a combustion engine
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0474322
(2002-12-05)
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우선권정보 |
DE-102 05 186(2002-02-08) |
국제출원번호 |
PCT/DE02/004456
(2002-12-05)
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§371/§102 date |
20031008
(20031008)
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국제공개번호 |
WO03/067072
(2003-08-14)
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발명자
/ 주소 |
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
7 인용 특허 :
7 |
초록
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The fuel injection device has a fuel-supply pump that delivers fuel from a fuel tank to a high-pressure pump which delivers fuel to a reservoir connected to at least one injector that injects fuel into the internal combustion engine. A fuel filter is disposed between the fuel-supply pump and the hig
The fuel injection device has a fuel-supply pump that delivers fuel from a fuel tank to a high-pressure pump which delivers fuel to a reservoir connected to at least one injector that injects fuel into the internal combustion engine. A fuel filter is disposed between the fuel-supply pump and the high-pressure pump, wherein a return for fuel from the at least one injector and/or from the reservoir to a low-pressure region is provided. The return is provided with an additional fuel filter and downstream of the fuel filter, the return feeds into the connection between the fuel-supply pump and the high-pressure pump.
대표청구항
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The invention claimed is: 1. A fuel injection device for an internal combustion engine, having a fuel-supply pump (10) that delivers fuel from a fuel tank (12) to a high-pressure pump (18) via a connection ( 16), wherein the high-pressure pump (18) delivers fuel to a reservoir (24), which is connec
The invention claimed is: 1. A fuel injection device for an internal combustion engine, having a fuel-supply pump (10) that delivers fuel from a fuel tank (12) to a high-pressure pump (18) via a connection ( 16), wherein the high-pressure pump (18) delivers fuel to a reservoir (24), which is connected to at least one injector ( 26) that injects fuel into the internal combustion engine, having a fuel filter (20) disposed between the fuel-supply pump (10) and the high-pressure pump (18), wherein a return line (60) for fuel from the at least one injector (26) and/or from the reservoir (24) to a low-pressure region is provided, the improvement comprising an additional fuel filter (62) in the return line (60), downstream of the fuel filter (20), the return line (60) feeding into the connection (16) between the fuel-supply pump (10) and the high-pressure pump (18), wherein the return line (60) contains a check valve (64) that opens toward the opening of the return line (60) into the connection (16). 2. The fuel injection device according to claim 1, further comprising a fuel metering device (34) in the connection (16 ) of the fuel-supply pump (10) to the high-pressure pump (18 ), the fuel metering device (34) adjusting the flow of fuel from the fuel-supply pump (10) to the high-pressure pump (18) in such a way that the high-pressure pump (18) generates a preset pressure in the reservoir (24), the return line (60) feeding into the connection (16) upstream of the fuel metering device (34). 3. The fuel injection device according to claim 1, further comprising a pressure booster device (32) between the reservoir (24) and the at least one injector (26) for increasing the pressure prevailing in the reservoir (24), the pressure booster device (32) having an outlet (74) that feeds into the return line (60) upstream of the additional fuel filter (62) . 4. The fuel injection device according to claim 2, further comprising a pressure booster device (32) between the reservoir (24) and the at least one injector (26) for increasing the pressure prevailing in the reservoir (24), the pressure booster device (32) having an outlet (74) that feeds into the return line (60) upstream of the additional fuel filter (62) . 5. The fuel injection device according to claim 1, further comprising a fuel cooler in the return line (60). 6. The fuel injection device according to claim 2, further comprising a fuel cooler in the return line (60). 7. The fuel injection device according to claim 3, further comprising a fuel cooler in the return line (60). 8. The fuel injection device according to claim 4, further comprising a fuel cooler in the return line (60). 9. A fuel injection device for an internal combustion engine, having a fuel-supply pump (10) that delivers fuel from a fuel tank (12) to a high-pressure pump (18) via a connection ( 16), wherein the high-pressure pump (18) delivers fuel to a reservoir (24), which is connected to at least one injector ( 26) that injects fuel into the internal combustion engine, having a fuel filter (20) disposed between the fuel-supply pump (10) and the high-pressure pump (18), wherein a return line (60) for fuel from the at least one injector (26) and/or from the reservoir (24) to a low-pressure region is provided, the improvement comprising an additional fuel filter (62) in the return line (60), downstream of the fuel filter (20), the return line (60) feeding into the connection (16) between the fuel-supply pump (10) and the high-pressure pump (18), further comprising a pressure booster device (32) between the reservoir (24) and the at least one injector (26) for increasing the pressure prevailing in the reservoir (24), the pressure booster device (32) having an outlet (74) that feeds into the return line (60) upstream of the additional fuel filter (62). 10. The fuel injection device according to claim 9, further comprising a fuel cooler in the return line (60).
이 특허에 인용된 특허 (7)
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Ishimoto, Masayori, Accumulator fuel injection system.
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Kelch Heinz (Knigsfeld DEX), Fuel cooling system for use with a closed fuel injection circuit in a diesel engine.
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Rembold, Helmut; Gmelin, Karl; Goldschmitt, Volkmar; Wolber, Jens; Schumacher, Mathias; Schaut, Edmund; Mueller, Uwe; Amler, Markus, Fuel supply apparatus for an internal combustion engine.
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Stumpp Gerhard (Stuttgart DEX), Fuel supply device.
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Eck Karl,DEX, Fuel supply system.
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Shimaoka Kiyoshige,JPX ; Ukonmaanaho Mauri,JPX, Leak tester and leak testing method.
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Maass Martin, Restriction structure for reducing gas formation in a high pressure fuel return line.
이 특허를 인용한 특허 (7)
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Armesto, Carlos; Szymusiak, Scott J.; Cooper, Scott Donald; Woodring, Christopher Arnold, Diesel fuel system conditioning.
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Marrack, Andrew O.; Shafer, Scott F.; Lehman, Martin A.; Adams, Kenneth C., Fluid conditioning module.
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Magel,Hans Christoph; Geyer,Gerhard, Fuel injection system comprising a pressure intensifier and a delivery rate-reduced low-pressure circuit.
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Ziegler, Thomas; Motolese, Giuseppe, Fuel supply system for an internal combustion engine.
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Bradford,Peter Francis, Fuel system.
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Brown, Bradley Allen; Castleberry, Larry; Fulton, Brien Lloyd; Szymusiak, Scott James, Fuel system for an internal combustion engine.
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Smith, Paul John, Fuel system for protecting a fuel filter.
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