WO2001036809A1 - Kraftstoffeinspritzsystem - Google Patents
Kraftstoffeinspritzsystem Download PDFInfo
- Publication number
- WO2001036809A1 WO2001036809A1 PCT/DE2000/003797 DE0003797W WO0136809A1 WO 2001036809 A1 WO2001036809 A1 WO 2001036809A1 DE 0003797 W DE0003797 W DE 0003797W WO 0136809 A1 WO0136809 A1 WO 0136809A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel
- pressure
- low
- injection system
- fuel injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/007—Venting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
Definitions
- the invention relates to a fuel injection system, in particular a common rail system, for supplying fuel to internal combustion engines, in particular diesel engines for commercial vehicles, with a low-pressure circuit in which at least one low-pressure feed pump delivers fuel from a fuel tank to a high-pressure pump, which delivers the high-pressure fuel to a central one High-pressure fuel reservoir promotes.
- Air is drawn in and compressed in diesel engines. At the end of the compression stroke, high-pressure fuel is injected into the combustion chamber, causing the mixture of air and fuel to self-ignite.
- the high pressure pump conveys the fuel to be injected from the fuel tank to the central high pressure fuel reservoir, which is referred to as the common rail, with the aid of the prefeed pump.
- Fuel lines lead from the rail to the individual injectors, which are assigned to the cylinders of the internal combustion engine.
- the injectors are operated individually by the engine electronics controlled to inject fuel into the combustion chamber of the internal combustion engine.
- the low pressure circuit When the fuel tank is run dry or after service work, the low pressure circuit is filled with air.
- the air in the low-pressure circuit must be conveyed through the high-pressure pump into the high-pressure fuel reservoir against the opening pressure (approx. 1.5 bar) of the suction valve of the high-pressure pump. From there, the air can escape via a return line. This venting against the opening pressure of the suction valve takes a very long time with conventional low-pressure feed pumps.
- Low pressure feed pumps with a larger delivery volume can be used. Such low-pressure feed pumps would, however, be greatly oversized for normal operation. As a result, the fuel flow supplied by such a low-pressure feed pump would have to be throttled in normal operation.
- the object of the invention is to simplify the venting of the low pressure circuit of a conventional fuel injection system.
- the fuel injection system according to the invention should be simple in construction and inexpensive to manufacture.
- the object is in a fuel injection system, in particular a common rail system, for supplying fuel to internal combustion engines, in particular diesel engines of commercial vehicles, with a low-pressure circuit in which at least one low-pressure feed pump delivers fuel from a fuel tank to a high-pressure pump, which pumps the high-pressure fuel into one central
- Fuel high-pressure accumulator promotes, solved in that a device is provided to specifically reduce the pressure in the low pressure circuit.
- a special embodiment of the invention is characterized in that the low-pressure circuit is connected to the tank via a return line in which a throttle is provided.
- the low pressure circuit is vented into the tank via the throttle. This has the advantage that no great back pressure has to be overcome when venting.
- a further special embodiment of the invention is characterized in that the throttle is integrated in an overflow valve which is provided in the return line.
- the throttle can e.g. in the form of a specifically leaky valve seat or as an additional throttle bore.
- the integration of the throttle in the overflow valve saves costs.
- a further special embodiment of the invention is characterized in that a vent hole with a vent screw is arranged at the highest point of the low pressure circuit in the installed state, in particular in a metering unit for the high pressure pump.
- the air in the low-pressure circuit can escape to the atmosphere via the manually operated vent screw.
- a further special embodiment of the invention is characterized in that the bleed screw has a flattened area in the thread area, which allows fuel to pass through the bleed hole if the bleed screw is slightly turned. In this way, an uncontrolled splashing out of the fuel at the beginning of the ventilation process can be avoided.
- a further special embodiment of the invention is characterized in that the high-pressure pump is equipped with a metering unit which has a solenoid valve which, in the energized state, connects the low-pressure circuit and a return to the
- the solenoid valve is normally closed when the internal combustion engine is started. If the solenoid valve is briefly energized when venting, the air in the low-pressure circuit can escape into the tank.
- a hydraulic circuit diagram of a fuel injection system according to the invention is shown in the attached figure.
- a fuel tank 1 fuel passes through a line 2 into a heat sink 3. From the heat sink 3, the fuel reaches a hand pump 5 via a line 4.
- a check valve 6 is connected in parallel with the hand pump 5. The check valve 6 forms a bypass, which is opened, for example, when the hand pump 5 is defective or blocked.
- a mechanically driven pre-feed pump 7 is arranged in line 4. Parallel to the mechanically driven pre-feed pump 7 are two check valves 38 and 39 arranged in opposite directions. The check valves 38 and 39 ensure that the pre-feed pump 7 is bypassed at a certain pressure difference.
- a fuel filter 8 with a water separator is arranged in line 4.
- a bypass line (not shown) with a check valve can be connected in parallel with the fuel filter 8.
- the fuel delivered from the fuel tank 1 by the hand pump 5 or by the mechanically or electrically driven prefeed pump 7 passes via line 4 and line 9 to a high-pressure pump 10.
- the high-pressure pump 10 comprises two high-pressure pump elements 11 and 12, in which the one of the Pre-feed pump 7 or the hand pump 5 is supplied with high pressure fuel.
- the high-pressure lines 13 and 14 connect the high-pressure pump elements 11 and 12 to a central high-pressure fuel store 17.
- Arrows 18, which emanate from the high-pressure fuel store 17, indicate a connection to the individual (not shown) injectors of the internal combustion engine to be supplied.
- a flow control valve 19 is arranged in line 9, as described, for example, in DE 197 25 472. Via the quantity control valve 19, the line 9 can be connected to a return line 24 which opens into the fuel tank.
- the line 4 is also connected to a line 20 in which a throttle 21 is arranged.
- the line 20 can be connected to the return line 24 via a 2/2 way solenoid valve 22. If the solenoid valve 22 is briefly opened via a control unit (not shown), air which is possibly in the low-pressure circuit can escape into the fuel tank 1 via the line 20 and the return line 24.
- a line 25 in which is a check valve 26 is connected to the return line 24.
- a throttle 27 is connected in parallel with the check valve 26, via which air which may be present in the low-pressure circuit can escape into the fuel tank 1.
- the line 4 is connected to a line 34 which opens into a vessel 35.
- the line 34 indicates a vent hole (not shown) which can be closed by a vent screw.
- the quantity control valve 19 and the 2/2-way solenoid valve 22 form a metering unit for the high-pressure element 12. Such a metering unit is also required for the high-pressure element 11, but this is not shown for reasons of clarity.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/889,172 US6564776B1 (en) | 1999-11-13 | 2000-10-27 | Fuel injection system |
| EP00988551A EP1144851B1 (de) | 1999-11-13 | 2000-10-27 | Kraftstoffeinspritzsystem |
| JP2001538667A JP2003515033A (ja) | 1999-11-13 | 2000-10-27 | 燃料噴射システム |
| DE50011815T DE50011815D1 (de) | 1999-11-13 | 2000-10-27 | Kraftstoffeinspritzsystem |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19954695A DE19954695A1 (de) | 1999-11-13 | 1999-11-13 | Kraftstoffeinspritzsystem |
| DE19954695.9 | 1999-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001036809A1 true WO2001036809A1 (de) | 2001-05-25 |
Family
ID=7928964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2000/003797 Ceased WO2001036809A1 (de) | 1999-11-13 | 2000-10-27 | Kraftstoffeinspritzsystem |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6564776B1 (de) |
| EP (1) | EP1144851B1 (de) |
| JP (1) | JP2003515033A (de) |
| DE (2) | DE19954695A1 (de) |
| WO (1) | WO2001036809A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012008892A1 (en) | 2010-07-14 | 2012-01-19 | Volvo Lastvagnar Ab | Fuel injection system with pressure-controlled bleed function |
| WO2014016181A1 (de) * | 2012-07-24 | 2014-01-30 | Continental Automotive Gmbh | Einspritzeinrichtung für eine verbrennungskraftmaschine |
| CN113503216A (zh) * | 2021-08-25 | 2021-10-15 | 一汽解放汽车有限公司 | 一种柴油机燃油供给系统及其测试方法 |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10239777A1 (de) * | 2002-08-29 | 2004-03-18 | Robert Bosch Gmbh | Einrichtung zur Entlüftung eines Förderaggregates |
| US7025044B1 (en) | 2003-07-16 | 2006-04-11 | R. H. Sheppard Co., Inc. | Pump assembly and method |
| DE10345225B4 (de) * | 2003-09-29 | 2005-11-10 | Siemens Ag | Kraftstoffeinspritzsystem mit einer Entlüftungsvorrichtung |
| JP2008180208A (ja) * | 2006-12-27 | 2008-08-07 | Denso Corp | 燃料供給装置 |
| JP4518140B2 (ja) * | 2007-12-05 | 2010-08-04 | 株式会社デンソー | 燃料供給装置 |
| JP2009257200A (ja) * | 2008-04-17 | 2009-11-05 | Bosch Corp | 燃料供給装置 |
| JP5142931B2 (ja) * | 2008-10-08 | 2013-02-13 | 日野自動車株式会社 | 噴射ポンプの燃料潤滑装置 |
| DE102009052599B4 (de) | 2009-11-10 | 2022-07-07 | Daimler Truck AG | Kraftstoffeinspritzanlage |
| DE102009052601B4 (de) | 2009-11-10 | 2022-07-07 | Daimler Truck AG | Kraftstoffeinspritzanlage |
| DE102009052600B4 (de) | 2009-11-10 | 2022-07-07 | Daimler Truck AG | Kraftstoffeinspritzanlage |
| DE102009052597A1 (de) | 2009-11-10 | 2011-05-12 | Daimler Ag | Kraftstoffeinspritzanlage |
| JP5388295B2 (ja) * | 2009-11-27 | 2014-01-15 | 富士重工業株式会社 | エンジンの燃料供給装置 |
| DE102010043255A1 (de) | 2010-11-03 | 2012-05-03 | Robert Bosch Gmbh | Kraftstoffeinspritzsystem sowie Verfahren zur Befüllung und/oder Entlüftung eines Kraftstoffeinspritzsystems |
| US9388779B2 (en) * | 2011-07-13 | 2016-07-12 | Volvo Construction Equipment Ab | Fuel system for an excavator |
| DE102011110912A1 (de) * | 2011-08-18 | 2013-02-21 | Audi Ag | Fluidführendes System eines Kraftfahrzeugs sowie Verfahren zum Entlüften eines fluidführenden Systems |
| CN107642440A (zh) * | 2016-07-20 | 2018-01-30 | 豆德旗 | 柴油车油路通自动补偿系统 |
| IT201900006865A1 (it) * | 2019-05-15 | 2020-11-15 | Bosch Gmbh Robert | Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna |
| CN111946523B (zh) * | 2020-08-17 | 2022-03-29 | 成都纵横大鹏无人机科技有限公司 | 一种无人机启动系统及其启动方法 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168855A (en) * | 1991-10-11 | 1992-12-08 | Caterpillar Inc. | Hydraulically-actuated fuel injection system having Helmholtz resonance controlling device |
| US5615656A (en) * | 1994-02-03 | 1997-04-01 | Mathis; Christian | Fuel-injection system for an internal combustion engine, in particular for a diesel motor, and a method for monitoring the same |
| DE19725472A1 (de) | 1997-06-17 | 1998-12-24 | Bosch Gmbh Robert | Mengenregelventil |
| US5878718A (en) * | 1995-05-26 | 1999-03-09 | Robert Bosch Gmbh | Fuel supply and method for operating an internal combustion engine |
| DE19818385A1 (de) * | 1998-04-24 | 1999-10-28 | Bosch Gmbh Robert | Zuschaltventil in einem Kraftstoffeinspritzsystem für Brennkraftmaschinen |
| DE19858084C1 (de) * | 1998-12-16 | 2000-04-20 | Siemens Ag | Einspritzsystem und zugehöriges Betriebsverfahren |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5143721U (de) * | 1974-09-28 | 1976-03-31 | ||
| JPS58136670U (ja) * | 1982-03-09 | 1983-09-14 | 株式会社ボッシュオートモーティブ システム | 燃料噴射ポンプのエアブリ−ダ |
| DE3638617A1 (de) * | 1986-11-12 | 1988-05-26 | Bosch Gmbh Robert | Fluessigkeitsfilter mit angebauter handpumpe |
| JPS63171665U (de) * | 1987-04-30 | 1988-11-08 | ||
| JPH05180115A (ja) * | 1991-12-27 | 1993-07-20 | Nippondenso Co Ltd | 高圧燃料供給ポンプ |
| JP3298968B2 (ja) * | 1993-03-09 | 2002-07-08 | 株式会社デンソー | 燃料噴射ポンプ |
| JPH0687662U (ja) * | 1993-05-28 | 1994-12-22 | 株式会社クボタ | ディーゼルエンジンの燃料噴射ポンプのエア抜き装置 |
| DE4320620B4 (de) * | 1993-06-22 | 2004-04-01 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen |
| JP3842331B2 (ja) * | 1995-05-26 | 2006-11-08 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 内燃機関の燃料供給のための燃料供給装置及び内燃機関を運転する方法 |
| DE19539883B4 (de) * | 1995-05-26 | 2011-06-01 | Robert Bosch Gmbh | Kraftstoffversorgungsanlage und Verfahren zum Betreiben einer Brennkraftmaschine |
| DE19612412B4 (de) * | 1996-03-28 | 2006-07-06 | Siemens Ag | Regelung für ein Druckfluid-Versorgungssystem, insbesondere für den Hochdruck in einem Kraftstoff-Einspritzsystem |
| DE19628591A1 (de) * | 1996-07-16 | 1998-01-22 | Knecht Filterwerke Gmbh | 3/2-Wegeventil für eine Kraftstoffversorgungseinrichtung eines Einspritz-Verbrennungsmotors |
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| DE19739653A1 (de) * | 1997-09-10 | 1999-03-11 | Bosch Gmbh Robert | Verfahren zum Erzeugen von unter Hochdruck stehendem Kraftstoff sowie System zur Kraftstoffhochdruckerzeugung |
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| JPH11200990A (ja) * | 1998-01-07 | 1999-07-27 | Unisia Jecs Corp | 燃料噴射制御装置 |
| DE19810867C2 (de) * | 1998-03-13 | 2000-02-24 | Bosch Gmbh Robert | Kraftstoffpumpen-Anordnung |
| DE19834121A1 (de) * | 1998-07-29 | 2000-02-03 | Bosch Gmbh Robert | Kraftstoffversorgungsanlage einer Brennkraftmaschine |
| JP2000145591A (ja) * | 1998-09-01 | 2000-05-26 | Mitsubishi Electric Corp | 燃料供給装置 |
| DE19846157A1 (de) * | 1998-10-07 | 2000-04-13 | Bosch Gmbh Robert | Pumpenanordnung zur Kraftstoffhochdruckerzeugung |
| DE19908217B4 (de) * | 1999-02-25 | 2005-03-17 | Siemens Ag | Anordnung und Verfahren zur Druckverstärkung von Kraftstoff für einen Kraftstoffinjektor |
| JP3808230B2 (ja) * | 1999-02-26 | 2006-08-09 | 三菱電機株式会社 | 高圧燃料ポンプの金属ダイヤフラム式脈動吸収装置 |
| JP2000303933A (ja) * | 1999-04-20 | 2000-10-31 | Mitsubishi Electric Corp | 高圧燃料ポンプ装置 |
| DE10039773A1 (de) * | 2000-08-16 | 2002-02-28 | Bosch Gmbh Robert | Kraftstoffversorgungsanlage |
-
1999
- 1999-11-13 DE DE19954695A patent/DE19954695A1/de not_active Ceased
-
2000
- 2000-10-27 JP JP2001538667A patent/JP2003515033A/ja active Pending
- 2000-10-27 US US09/889,172 patent/US6564776B1/en not_active Expired - Lifetime
- 2000-10-27 WO PCT/DE2000/003797 patent/WO2001036809A1/de not_active Ceased
- 2000-10-27 EP EP00988551A patent/EP1144851B1/de not_active Expired - Lifetime
- 2000-10-27 DE DE50011815T patent/DE50011815D1/de not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168855A (en) * | 1991-10-11 | 1992-12-08 | Caterpillar Inc. | Hydraulically-actuated fuel injection system having Helmholtz resonance controlling device |
| US5615656A (en) * | 1994-02-03 | 1997-04-01 | Mathis; Christian | Fuel-injection system for an internal combustion engine, in particular for a diesel motor, and a method for monitoring the same |
| US5878718A (en) * | 1995-05-26 | 1999-03-09 | Robert Bosch Gmbh | Fuel supply and method for operating an internal combustion engine |
| DE19725472A1 (de) | 1997-06-17 | 1998-12-24 | Bosch Gmbh Robert | Mengenregelventil |
| DE19818385A1 (de) * | 1998-04-24 | 1999-10-28 | Bosch Gmbh Robert | Zuschaltventil in einem Kraftstoffeinspritzsystem für Brennkraftmaschinen |
| DE19858084C1 (de) * | 1998-12-16 | 2000-04-20 | Siemens Ag | Einspritzsystem und zugehöriges Betriebsverfahren |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012008892A1 (en) | 2010-07-14 | 2012-01-19 | Volvo Lastvagnar Ab | Fuel injection system with pressure-controlled bleed function |
| CN103080531A (zh) * | 2010-07-14 | 2013-05-01 | 沃尔沃拉斯特瓦格纳公司 | 具有压力控制式泄放功能的燃料喷射系统 |
| EP2593660A4 (de) * | 2010-07-14 | 2014-01-29 | Volvo Lastvagnar Ab | Brennstoffeinspritzsystem mit druckgesteuerter ausflussfunktion |
| US9541045B2 (en) | 2010-07-14 | 2017-01-10 | Volvo Lastvagnar Ab | Fuel injection system with pressure-controlled bleed function |
| WO2014016181A1 (de) * | 2012-07-24 | 2014-01-30 | Continental Automotive Gmbh | Einspritzeinrichtung für eine verbrennungskraftmaschine |
| CN104685204A (zh) * | 2012-07-24 | 2015-06-03 | 大陆汽车有限公司 | 用于内燃机的喷射机构 |
| US10174735B2 (en) | 2012-07-24 | 2019-01-08 | Continental Automotive Gmbh | Injection device for an internal combustion engine |
| CN113503216A (zh) * | 2021-08-25 | 2021-10-15 | 一汽解放汽车有限公司 | 一种柴油机燃油供给系统及其测试方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1144851A1 (de) | 2001-10-17 |
| JP2003515033A (ja) | 2003-04-22 |
| EP1144851B1 (de) | 2005-12-07 |
| DE50011815D1 (de) | 2006-01-12 |
| DE19954695A1 (de) | 2001-05-23 |
| US6564776B1 (en) | 2003-05-20 |
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