EP1780406B1 - Injektor für eine Kraftstoffeinspritzanlage sowie Kraftstoffeinspritzanlage mit einem solchen Injektor - Google Patents
Injektor für eine Kraftstoffeinspritzanlage sowie Kraftstoffeinspritzanlage mit einem solchen Injektor Download PDFInfo
- Publication number
- EP1780406B1 EP1780406B1 EP06405434A EP06405434A EP1780406B1 EP 1780406 B1 EP1780406 B1 EP 1780406B1 EP 06405434 A EP06405434 A EP 06405434A EP 06405434 A EP06405434 A EP 06405434A EP 1780406 B1 EP1780406 B1 EP 1780406B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- injector
- injectors
- injection system
- space
- 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.)
- Not-in-force
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Images
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
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
-
- 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
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/166—Selection of particular materials
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/001—Control chambers formed by movable sleeves
Definitions
- FIG Fig. 1 Such a configuration is schematically shown in FIG Fig. 1 reproduced, with only two injectors 11 and 12 are shown.
- Each of the injectors 11, 12 has an internal high pressure chamber 14, which opens down to an injection nozzle 13, which can be opened and closed by means of a nozzle needle 16.
- the high-pressure chamber 14 is connected in the manner of a T-piece through a narrow connection channel 15 with a line section of the high-pressure line 17 extending between two high-pressure connections A.
- the high-pressure line 17 forms the common rail and determines its storage volume.
- the high-pressure spaces 14 in the injectors 11, 12 are fluid-dynamically decoupled from the high-pressure line 17 by the narrow connection channels 15, so that they do not play any role in the common-rail function. In order to obtain a sufficient storage volume, therefore, the high-pressure line 17 must be designed accordingly. At the same time, the storage volume changes significantly with the distance of the injectors from each other.
- EP-A1-1 063 420 discloses a fuel supply system in the form of a common rail system in which the injection valves are each actuated by means of a column of stacked piezoelectric elements.
- the columns extend longitudinally through a high-pressure space enclosed by the injector housing, which is also used as an additional high-pressure storage volume, thus enabling a reduction in the common-rail volume located between the injectors.
- the injector according to the invention is characterized in that at least two separate high-pressure ports are provided in the injector housing, which allow access from the outside to the high-pressure chamber and are each designed to connect a high-pressure line.
- the injectors are arranged with their high pressure ports in the high pressure line in series such that the high pressure line passes through the high pressure chamber of each injector.
- An embodiment of the injector according to the invention is characterized in that the high-pressure connections are arranged at the upper end of the high-pressure chamber, and that the high-pressure connections are arranged in the axial direction at the same height. This results in good accessibility and ease of manufacture and connection. This applies in particular if, according to a further development, two high-pressure connections are provided, and the two high-pressure connections are arranged opposite one another with respect to the axis and are aligned with one another.
- the high pressure ports preferably have a thread for releasably screwing the high pressure line, in particular, the thread is formed as an internal thread.
- the injector becomes particularly simple if the high-pressure chamber is arranged coaxially with the axis of the injector.
- the core idea of the inventive fuel injection system is to use injectors with a high-pressure chamber, from which the fuel required for the injection is removed, the volume of the high-pressure chamber is chosen so large that the sum of the volumes of the high-pressure chambers of several similar injectors in a common rail Injection system sufficient to form the storage volume required for the common rail, and to insert these injectors with their high-pressure chambers in a row in the high-pressure line, so that the high-pressure chambers together with the high-pressure line connecting them form a common rail with a corresponding storage volume.
- a space-saving fuel injection system according to the common rail principle can be realized in a particularly simple and effective manner.
- the injectors according to the invention can be used with advantage.
- An embodiment of the fuel injection system according to the invention is characterized in that a return line to the high-pressure pump is returned from the last of the injectors in series. As a result, a kind of loop is formed, which is advantageous for the compensation of pressure fluctuations in the storage volume formed.
- FIG. 2 is in one too Fig. 1 comparable representation reproduced the principle of the fuel injection system according to the invention.
- the fuel injection system 10 'again only two injectors 11' and 12 'are shown by several.
- Each of the injectors 11 ', 12' has an internal one High-pressure chamber 14 'is injected from the high-pressure fuel through the injector 13 and the nozzle needle 16 formed injection valve into the combustion chamber.
- two high-pressure connections A' are arranged laterally and oppositely, with which the injectors 11 ', 12' can be inserted in series into the high-pressure line 17 'coming from the high-pressure pump so that the High-pressure chambers 14 'and the connecting portion of the high-pressure line form a continuous storage volume in the manner of a common rail.
- the prerequisite for this is that the volume of the individual high-pressure chamber 14 'is large enough so that the sum of the volumes of all in-line injectors is sufficient as a common-rail storage volume.
- a novel injector is proposed.
- Fig. 3 is shown in longitudinal section a preferred embodiment of such an injector according to the invention.
- the injector 20 is intended for the direct injection of fuel, preferably for diesel engines, based on the common rail principle.
- the injector 20 has within a Injektorgepuruses 18 in the longitudinal direction (along the axis 45) extending, coaxial high-pressure chamber 23, in which, for example, the nozzle needle 26 of the injector 20 is located.
- the actual injection valve 22 is screwed by means of a union nut 37.
- injection holes 38 which communicate with the high-pressure chamber 23 and can be opened or closed with the nozzle needle 26.
- the sum of the individual volumes of the high-pressure chambers 23 in the injectors is used by being connected to one another via simple high-pressure lines in a type of series connection ( Fig. 4 ).
- the high-pressure chamber 23 of the injector 20 must have at least two separate high-pressure ports 24 and 25 ( Fig. 3 ). These high pressure ports 24, 25 are laterally mounted in the radial direction on the injector housing 18 and each open into the high pressure chamber 23, thus creating a connection of the high pressure chamber 23 to the high pressure connecting lines (43 in Fig. 4 ), which connect the series-connected injectors 20.1, ..., 20.4 with each other ( Figure 4 ).
- the high-pressure pump 41 likewise has two high-pressure connections and, together with the high-pressure feed line 42, the injectors 20.1,..., 20.4, the high-pressure connection lines 43 and the return line 44, forms a kind of ring line, which is advantageous for the compensation of pressure fluctuations in the storage volume formed.
- the high-pressure connections 24, 25 on the injector housing 18 are preferably arranged at the same height in the axial direction. They are arranged opposite each other with respect to the axis 45 and are aligned with each other. In addition, they are identical in design and dimensions, in particular with regard to the passage cross-section.
- the high-pressure ports 24, 25 have, for example, a (in Fig. 3 not shown) internal thread, which as mating thread for a (not shown) high-pressure fitting for pressure-resistant connection to the high-pressure line 42, 43, 44 ( Fig. 4 ) serves. Analogously, the connection points on the high-pressure pump 41 (FIG. Fig. 4 ).
- the spring 29 pushes the armature 31 downwards, and the control bore 32 is closed.
- the closing spring 36 presses the needle shaft 21 with the nozzle needle 26 down, and the injection through the injection holes 38 is interrupted.
- FIG Fig. 4 An exemplary four-cylinder fuel injection system 40 according to the invention is shown in FIG Fig. 4 shown in simplified form.
- a high pressure supply line 42 goes to the four in series and with each other with high pressure connection lines 43 connected injectors 20.1 to 20.4.
- a return line 44 goes back to the high pressure pump 41.
- the injectors 20.1 to 20.4 preferably have the internal structure, as in Fig. 3 is illustrated by the injector 20. They are inserted with their high-pressure chambers 23 directly into the ring line formed from the lines 42, 43 and 44.
- the sum of the volumes of the four high-pressure chambers 23 and the interposed high-pressure connection lines 43 forms a storage volume for the fuel under high pressure in the manner of a common rail, which can completely replace the conventional external common rail. It goes without saying that the principle of the invention can be used not only for four cylinders, but in an analogous manner for other numbers of cylinders such as 3, 5, 6 or 8.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH17122005 | 2005-10-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1780406A1 EP1780406A1 (de) | 2007-05-02 |
EP1780406B1 true EP1780406B1 (de) | 2011-01-05 |
Family
ID=36686065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06405434A Not-in-force EP1780406B1 (de) | 2005-10-25 | 2006-10-12 | Injektor für eine Kraftstoffeinspritzanlage sowie Kraftstoffeinspritzanlage mit einem solchen Injektor |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070089712A1 (ja) |
EP (1) | EP1780406B1 (ja) |
JP (1) | JP2007120500A (ja) |
KR (1) | KR101247664B1 (ja) |
CN (1) | CN1955455B (ja) |
AT (1) | ATE494477T1 (ja) |
DE (1) | DE502006008648D1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006040248A1 (de) * | 2006-08-28 | 2008-03-06 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine |
DE102007039893B4 (de) * | 2007-08-23 | 2013-05-08 | Continental Automotive Gmbh | Einspritzanlage für eine Brennkraftmaschine |
US8596247B2 (en) | 2010-07-13 | 2013-12-03 | Caterpillar Inc. | Fuel delivery assembly |
DE102013002758B4 (de) * | 2013-02-19 | 2020-03-19 | Woodward L'orange Gmbh | Spülverfahren zur Durchführung mit einem Kraftstoffinjektor |
KR200471321Y1 (ko) * | 2013-05-20 | 2014-02-17 | 주식회사 태하 | 액체 디스펜서용 챔버조립체 |
DE102018006853A1 (de) | 2018-08-29 | 2019-09-26 | Mtu Friedrichshafen Gmbh | Modulares Common-Railsystem |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3705848A1 (de) * | 1987-02-24 | 1988-09-01 | Bosch Gmbh Robert | Hydraulischer kreislauf einer kraftstoffeinspritzanlage |
DE19712135C1 (de) * | 1997-03-22 | 1998-08-13 | Mtu Friedrichshafen Gmbh | Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
Family Cites Families (28)
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DE3377793D1 (en) * | 1982-10-19 | 1988-09-29 | Idemitsu Kosan Co | Process for the production of para-xylene |
ATE33057T1 (de) * | 1983-12-23 | 1988-04-15 | Herrenknecht Gmbh | Tunnelbohrsystem zum auffahren von tunneln mittels rohrvorpressung. |
JPH07119582A (ja) * | 1993-10-26 | 1995-05-09 | Hino Motors Ltd | ディーゼルエンジンの燃料噴射ノズル |
JP3740733B2 (ja) * | 1996-02-13 | 2006-02-01 | いすゞ自動車株式会社 | 内燃機関の燃料噴射装置 |
SE510090C2 (sv) * | 1996-10-11 | 1999-04-19 | Volvo Lastvagnar Ab | Långsträckt cylinderhuvud med kaviteter för insprutningsenheter och bränsletillförselanordningar |
US6113012A (en) * | 1998-06-25 | 2000-09-05 | Caterpillar Inc. | Rate shaped fuel injector with internal dual flow rate office |
US6694950B2 (en) * | 1999-02-17 | 2004-02-24 | Stanadyne Corporation | Hybrid control method for fuel pump using intermittent recirculation at low and high engine speeds |
BR0008300B1 (pt) * | 1999-02-17 | 2011-08-23 | sistema de injeção de combustìvel a gasolina para um motor de combustão interna, e, métodos para controlar a operação de um sistema de injeção de gasolina direta de alimentador comum de alta pressão para um motor de combustão interna, e para controlar um sistema de injeção de combustìvel a gasolina de alimentador comum. | |
GB9914790D0 (en) * | 1999-06-25 | 1999-08-25 | Lucas Ind Plc | Fuel supply system |
DE19952513A1 (de) * | 1999-10-30 | 2001-06-07 | Bosch Gmbh Robert | Kraftstoffeinspritzsystem für Brennkraftmaschinen mit konstantem Lecköldruck im Injektor |
US6484699B2 (en) * | 2000-03-06 | 2002-11-26 | Marius A. Paul | Universal fuel injection system |
DE10101476A1 (de) * | 2001-01-12 | 2002-07-25 | Bosch Gmbh Robert | Common-Rail-Einheit |
DE10123993A1 (de) * | 2001-05-17 | 2002-11-21 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
DE50214476D1 (de) * | 2001-07-03 | 2010-07-15 | Crt Common Rail Tech Ag | Brennstoffeinspritzventil für Verbrennungskraftmaschinen |
DE10205750A1 (de) * | 2002-02-12 | 2003-08-21 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
EP1476652B1 (de) * | 2002-02-22 | 2005-07-06 | CRT Common Rail Technologies AG | Brennstoffeinspritzventil für verbrennungskraftmaschinen |
DE10210282A1 (de) * | 2002-03-08 | 2003-09-25 | Bosch Gmbh Robert | Vorrichtung zum Einspritzen von Kraftstoff an stationären Verbrennungskraftmaschinen |
DE10221384A1 (de) * | 2002-05-14 | 2003-11-27 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
DE10231623A1 (de) * | 2002-07-12 | 2004-01-29 | Robert Bosch Gmbh | Magnetventilgesteuertes Servoventil, insbesondere Injektor eines Kraftstoffeinspritzsystems für Brennkraftmaschinen |
KR20040023302A (ko) * | 2002-09-11 | 2004-03-18 | 현대자동차주식회사 | 자동차용 연료 공급 시스템 |
US6945475B2 (en) * | 2002-12-05 | 2005-09-20 | Caterpillar Inc | Dual mode fuel injection system and fuel injector for same |
DE10304742A1 (de) * | 2003-02-06 | 2004-08-19 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
US6827065B2 (en) * | 2003-04-08 | 2004-12-07 | General Motors Corporation | Diesel injection system with dual flow fuel line |
DE10355645A1 (de) * | 2003-11-28 | 2005-07-07 | Robert Bosch Gmbh | Brennstoffeinspritzsystem |
JP2005256703A (ja) * | 2004-03-11 | 2005-09-22 | Denso Corp | 蓄圧式燃料噴射装置 |
AT501851B1 (de) * | 2004-07-28 | 2008-05-15 | Bosch Gmbh Robert | Verbindung von leitungen für hochdruckmedien |
DE102005012928A1 (de) * | 2005-03-21 | 2006-09-28 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine |
EP1717434A1 (en) * | 2005-04-28 | 2006-11-02 | Delphi Technologies, Inc. | Improvements relating to fuel injection systems |
-
2006
- 2006-10-12 EP EP06405434A patent/EP1780406B1/de not_active Not-in-force
- 2006-10-12 AT AT06405434T patent/ATE494477T1/de active
- 2006-10-12 DE DE502006008648T patent/DE502006008648D1/de active Active
- 2006-10-23 US US11/584,960 patent/US20070089712A1/en not_active Abandoned
- 2006-10-24 JP JP2006289290A patent/JP2007120500A/ja active Pending
- 2006-10-24 KR KR1020060103541A patent/KR101247664B1/ko active IP Right Grant
- 2006-10-24 CN CN2006101507076A patent/CN1955455B/zh not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3705848A1 (de) * | 1987-02-24 | 1988-09-01 | Bosch Gmbh Robert | Hydraulischer kreislauf einer kraftstoffeinspritzanlage |
DE19712135C1 (de) * | 1997-03-22 | 1998-08-13 | Mtu Friedrichshafen Gmbh | Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
CN1955455B (zh) | 2013-08-07 |
US20070089712A1 (en) | 2007-04-26 |
CN1955455A (zh) | 2007-05-02 |
EP1780406A1 (de) | 2007-05-02 |
JP2007120500A (ja) | 2007-05-17 |
DE502006008648D1 (de) | 2011-02-17 |
KR101247664B1 (ko) | 2013-04-01 |
KR20070044784A (ko) | 2007-04-30 |
ATE494477T1 (de) | 2011-01-15 |
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