WO1998058169A1 - Brennstoffeinspritzanlage - Google Patents
Brennstoffeinspritzanlage Download PDFInfo
- Publication number
- WO1998058169A1 WO1998058169A1 PCT/DE1998/000810 DE9800810W WO9858169A1 WO 1998058169 A1 WO1998058169 A1 WO 1998058169A1 DE 9800810 W DE9800810 W DE 9800810W WO 9858169 A1 WO9858169 A1 WO 9858169A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel
- fuel injection
- injection valve
- seal carrier
- injection system
- Prior art date
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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel 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
- F02M55/004—Joints; Sealings
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
Definitions
- the invention relates to a fuel injection system for injecting fuel into an internal combustion engine, in particular for injecting fuel directly into the combustion chamber or the combustion chambers of the internal combustion engine.
- the invention is based on a fuel injection system according to the preamble of the main claim. It is already known from JP-OS 08-312503 to provide, on the cylinder head of an internal combustion engine, receiving bores for one fuel injection valve for each combustion chamber of the internal combustion engine, into each of which an injection section of the associated fuel injection valve can be used for the direct injection of fuel into the respective combustion chamber.
- the fuel injection valve inserted into the receiving bore of the cylinder head is held down by means of a hold-down device designed as a clamping claw against the relatively high combustion pressure prevailing in the combustion chamber.
- a fuel distribution line is provided in JP-OS 08-312503, which connects the fuel injection valves to a fuel pump.
- the fuel distributor line has a receiving element for each fuel injection valve, into which the inlet section of the fuel injection valve can be inserted, so that the receiving element surrounds the inlet section in a cup-like manner.
- the inlet section of each fuel injector has Sealing element in the form of an O-ring, which bears sealingly on the inner wall of the receiving element.
- the fuel injectors mounted in the receiving bores of the cylinder head are not uniformly but extensively acted upon by the hold-down force exerted by the clamping claws, which results in a slight tilting of the fuel injectors in the receiving bores.
- the additional position and angle deviations resulting at the inlet sections of the fuel injection valves make the assembly of the fuel distributor line even more difficult.
- the O-ring arranged between the inlet section of the fuel injection valve and the receiving element of the fuel distributor line compensates for the position and angle deviations only to a very small, insufficient extent.
- the fuel injection system known from JP-OS 08-312503 in addition to the disadvantage of difficult assembly, also has the risk of fuel leakage on the seal which does not compensate for the position and angle deviations.
- the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that positional and angular deviations resulting from the manufacturing tolerances and assembly-related tolerances are safely compensated. This considerably simplifies the assembly of the fuel injection system, in particular the fuel distributor line. Tensioning of the fuel injection valves or the fuel distributor line, as can occur with a connection that does not compensate for position and angle deviations, is avoided. Furthermore, there are no sealing problems between the fuel distributor line and the inlet sections of the fuel injection valves, since the sealing elements are not deformed on one side by unbalanced position and angle deviations.
- the fuel injection system further developed according to the invention allows greater tolerances in the manufacture of the cylinder head and the fuel distributor line, so that the production outlay for these parts is reduced and the production costs are reduced accordingly.
- the fuel rail can be installed relatively close to the cylinder head, so that only a small space is required.
- the cross-section of the connection area between the fuel distributor line and the inlet section of the fuel injection valves can be dimensioned to be relatively wide and short, so that no pressure drop occurs when the fuel injection valves are opened.
- the outside diameter of the seal carrier upstream of the second, axial sealing element is dimensioned larger than the outside diameter of the second annular groove assigned to the radial sealing element.
- FIG. 1 shows the assembly of a fuel injection valve and the connection to the fuel distributor line according to the prior art, which is shown in section
- FIG. 2 shows a section through an exemplary embodiment according to the invention in a partial representation of the connection area between the fuel injection valve and the fuel distributor line.
- the fuel injection valve 1 is mounted on the cylinder head 2 relatively rigidly by inserting it into a cylinder head bore (not shown in FIG. 1).
- a fuel injector 1 is generally provided for each combustion chamber of the internal combustion engine.
- the fuel distributor line 4 is installed, which serves to supply the fuel from a fuel pump (not shown) to the individual fuel injection valves 1.
- the inlet section 3 of each fuel injection valve 1 is in an associated connecting piece 5 of the fuel Distribution line 4 used and sealed via a sealing ring 6 provided on the inlet section 3.
- Fig. 2 shows an exemplary embodiment of the invention in an excerpt, sectional view. Only the connection area between the fuel injection valve 1 and the fuel distributor line 4 is shown.
- the fuel distributor line 4 has a fuel outlet opening 10 which is connected to the main duct 7 shown in FIG. 1 via a connecting bore 11.
- the connecting bore 11 opens into a receiving bore 12 of the connecting piece 5.
- the receiving bore 12 narrows in a conical section 13.
- the inlet section 3 of the fuel injector 1 has a fuel inlet opening 14, which is surrounded at the inlet end of the fuel injector 1 by a radially oriented end face 16 extending perpendicular to the longitudinal axis 15 of the fuel injector 1.
- a step-shaped fuel feed bore 17 At the fuel inlet opening 14 of the fuel injection valve 1 there is a step-shaped fuel feed bore 17.
- a bushing 18 can be inserted into the fuel inlet opening 14. In the illustrated embodiment, the bushing 18 can be pressed into the fuel inlet bore 17 with a precise fit and is locked by a frictional engagement. Alternatively, however, it is also possible to provide the bushing 18 at its downstream end with an external thread which can be screwed into an internal thread in the fuel inlet bore 17.
- the bushing 18 has a continuous longitudinal bore 19 extending along the longitudinal axis 15, which is stepped in the exemplary embodiment and which, at its upstream end, has the conical section 13 of the receiving bore 12 with the fuel outlet opening 10 in it Fuel distribution line 4 and via its downstream end with the fuel inlet bore 17 in connection.
- the longitudinal bore 19 therefore takes over the management of the fuel.
- the bushing 18 forms a connecting device 18, 20 according to the invention, which enables positional compensation between the position of the inlet section 3 of the fuel injection valve 1 and the position of the connecting piece 5 of the fuel distributor line 4 within a predetermined variation range.
- the seal carrier 20 is locked between the inlet-side end face 16 of the inlet section 3 and a collar 21 which is arranged on the inlet-side end of the bushing 18 and projects radially outwards.
- the bushing 18 is pressed into the fuel inlet bore 17 of the fuel injection valve 1 only to such an extent that the seal carrier 20 is slightly axially movable within an axial play b shown in FIG. 2 for clarification.
- the seal carrier 20 is therefore not clamped between the collar 21 of the bushing 18 and the inlet section 3 of the fuel injector 1, but rather can move radially in the radial direction within a displacement range c which is also shown in FIG. 2 for clarification.
- the radial displacement range c of the seal carrier 20 can be approximately 0.6 mm, while the axial play b of the seal carrier 20 can be between 0.05 mm and 0.1 mm.
- the radial displacement area c is determined by the difference between the inner diameter d 2 of a through hole 22 of the annular seal carrier 20 and the outer diameter d ! of a penetration section 23 of the bushing 18.
- the penetration section 23 penetrates the seal carrier 20 in the region of its through bore 22.
- the seal carrier 20 has a radially outward extension 25 at its downstream end 24.
- a first circumferential annular groove 27 is formed on the seal carrier 20 on one end face 16 of the inlet section 3 of the fuel injection valve 1 opposite, radially oriented end face 26, which is used to receive and guide a first sealing element 28 in the form of an O-ring or quad Ring trained sealing ring is used.
- the first sealing element 28 serves as a radial seal and seals the sealing carrier 20 with respect to the inlet section 3 of the fuel injection valve 1.
- the first sealing element 28 is slidably movable on the end face 16 of the inlet section 3 of the fuel injector 1.
- the seal carrier 20 has a second annular groove 31 on a lateral surface 30 opposite the wall 29 of the connecting piece 5.
- the second annular groove 31 serves to receive and guide a second sealing element 32 in the form of a sealing ring designed as an O-ring or quad ring.
- the second sealing element 32 effects an axial seal and seals the seal carrier 20 from the connecting piece 5.
- the second sealing element 32 is slidably slidable in the receiving bore 12 of the connecting piece 5.
- the outer edge 33 of the annular groove 27 serving to receive the first sealing element 28 is offset radially inward relative to the outer diameter of the seal carrier 20 in the region of the second sealing element 32 by the section d shown in FIG. 2 for illustration. If the seal carrier 20 is subjected to the fuel pressure in the operating state, the entire upstream end face 34 of the seal carrier 20 up to its outer diameter is thus available as the contact surface for the fuel pressure on the upstream side. On the other hand, the seal carrier 20 is exposed to the fuel pressure at its downstream end up to the outer edge 33 of the first annular groove 27, since the area lying radially further out is sealed.
- the seal carrier 20 is therefore subjected to an effective axial force component by the fuel pressure, which presses the seal carrier 20 in the direction of the fuel injection valve 1.
- the first sealing element 28 is therefore pressed against the end face 16 of the inlet section 3 of the fuel injector 1, so that a good sealing effect is produced.
- the connecting device 18, 20 according to the invention can be fully inserted into the receiving bore 12 of the connecting piece 5 in its area projecting beyond the inlet section 3 of the fuel injection valve 1.
- the special one Advantage is that the annular seal carrier 20 enables both radial compensation and axial compensation between the position of the inlet section 3 of the fuel injector 1 and the position of the receiving bore 12 of the connecting piece 5 assigned to the fuel injector 1. While for a radial compensation, the first sealing element 28 is displaceable on the end face 16 of the inlet section 3, for an axial compensation, the second sealing element 32 is axially displaceable in the receiving bore 12 of the connecting piece 5.
- the receiving bore 12 can have a conical section 35 in the region of its mouth.
- the fuel injection system designed according to the invention considerably simplifies the assembly of the fuel distributor glue 4 on the fuel injection valves 1.
- a drop in pressure due to the short and wide piping and the small distance between the fuel manifold 4 and the fuel inlet openings 14 of the fuel injection valves 1 is largely avoided. Overall, this results in an extremely compact and flexible design.
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 (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/242,223 US6102007A (en) | 1997-06-13 | 1998-03-19 | Fuel injection system |
EP98925412A EP0918928B1 (de) | 1997-06-13 | 1998-03-19 | Brennstoffeinspritzanlage |
AU77561/98A AU733211B2 (en) | 1997-06-13 | 1998-03-19 | Fuel injection system |
JP11503511A JP2000517028A (ja) | 1997-06-13 | 1998-03-19 | 燃料噴射装置 |
DE59806710T DE59806710D1 (de) | 1997-06-13 | 1998-03-19 | Brennstoffeinspritzanlage |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19725076.9 | 1997-06-13 | ||
DE19725076A DE19725076A1 (de) | 1997-06-13 | 1997-06-13 | Brennstoffeinspritzanlage |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998058169A1 true WO1998058169A1 (de) | 1998-12-23 |
Family
ID=7832425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000810 WO1998058169A1 (de) | 1997-06-13 | 1998-03-19 | Brennstoffeinspritzanlage |
Country Status (7)
Country | Link |
---|---|
US (1) | US6102007A (de) |
EP (1) | EP0918928B1 (de) |
JP (1) | JP2000517028A (de) |
KR (1) | KR20000068117A (de) |
AU (1) | AU733211B2 (de) |
DE (2) | DE19725076A1 (de) |
WO (1) | WO1998058169A1 (de) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19902186A1 (de) * | 1999-01-21 | 2000-07-27 | Bosch Gmbh Robert | Brennstoffeinspritzvorrichtung |
JP3802702B2 (ja) * | 1999-02-26 | 2006-07-26 | 株式会社ケーヒン | 電磁式燃料噴射弁におけるシール部材の取付け構造 |
US6314943B1 (en) * | 1999-10-22 | 2001-11-13 | Ford Global Technologies, Inc. | Fuel supply rail with integrated fuel injector load spring |
DE10056005A1 (de) | 2000-11-11 | 2002-05-16 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
DE10056038A1 (de) | 2000-11-11 | 2002-05-16 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
DE10103825A1 (de) * | 2001-01-29 | 2002-08-08 | Bosch Gmbh Robert | Einspritzventil mit aufgesetzter Kraftstoffversorgung |
US6418911B1 (en) * | 2001-07-13 | 2002-07-16 | Siemens Diesel Systems Technology | Device and procedure for coupling a fluid rail with fuel injectors |
DE10158788A1 (de) * | 2001-11-30 | 2003-06-12 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
DE10208227A1 (de) * | 2002-02-26 | 2003-10-02 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
JP3846337B2 (ja) * | 2002-03-15 | 2006-11-15 | 株式会社デンソー | インジェクタ固定方法およびインジェクタ固定装置 |
DE10240130A1 (de) | 2002-08-30 | 2004-03-18 | Robert Bosch Gmbh | Steckverbindung für medienführende Leitungen |
US6640784B1 (en) | 2002-10-09 | 2003-11-04 | Robert Bosch Corporation | Spark ignition direct injection system |
DE10360335A1 (de) | 2003-12-20 | 2005-07-14 | Robert Bosch Gmbh | Steckverbinder für Leistungssysteme mit variabler Schlauchführung |
DE10360334A1 (de) * | 2003-12-20 | 2005-07-14 | Robert Bosch Gmbh | Kraftstoffrücklaufsystem mit Drossel |
EP1548271B1 (de) * | 2003-12-22 | 2010-04-21 | Continental Automotive GmbH | Ein Kraftstoffeinspritzsystem |
JP4546849B2 (ja) * | 2005-02-14 | 2010-09-22 | 三桜工業株式会社 | 管体のシール構造 |
US20090013968A1 (en) * | 2007-07-09 | 2009-01-15 | Keegan Kevin R | Vapor recovery system for a direct injector fuel rail assembly |
DE102007035714A1 (de) | 2007-07-30 | 2009-02-05 | Robert Bosch Gmbh | Brennstoff-Einspritzanlage mit Ausgleichselement |
US7543567B2 (en) * | 2007-10-29 | 2009-06-09 | Caterpillar Inc. | Fuel system having a one-piece hollow tube connection |
EP2093412B1 (de) * | 2008-02-19 | 2011-01-19 | Continental Automotive GmbH | Kupplungsvorrichtung |
EP2093413B1 (de) * | 2008-02-19 | 2011-01-12 | Continental Automotive GmbH | Kupplungsvorrichtung |
EP2112367B1 (de) * | 2008-04-23 | 2011-09-14 | Continental Automotive GmbH | Kupplungsanordnung und Kraftstoffeinspritzventil |
US20090321536A1 (en) * | 2008-06-30 | 2009-12-31 | Caterpillar Inc. | Piston having channel extending through piston head |
US7942132B2 (en) * | 2008-07-17 | 2011-05-17 | Robert Bosch Gmbh | In-line noise filtering device for fuel system |
EP2208883B1 (de) * | 2009-01-19 | 2015-07-22 | Continental Automotive GmbH | Kupplungsvorrichtung |
DE102012204310A1 (de) * | 2012-03-19 | 2013-09-19 | Robert Bosch Gmbh | Dicht umspritztes Bauelement und Verfahren zum Herstellen eines solchen Bauelements |
DE102014200581A1 (de) * | 2014-01-15 | 2015-07-16 | Robert Bosch Gmbh | Brennstoffeinspritzanlage mit einer Brennstoff führenden Komponente, einem Brennstoffeinspritzventil und einer Verbindungseinrichtung |
DE102017108270B4 (de) * | 2017-04-19 | 2023-11-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Dichtungskassette für einen Injektor einer Verbrennungskraftmaschine und Injektoranordnung für eine Verbrennungskraftmaschine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2416803A1 (de) * | 1974-04-06 | 1975-10-16 | Daimler Benz Ag | Elektronisch gesteuerte benzin-einspritzanlage |
DE2908095A1 (de) | 1979-03-02 | 1980-09-04 | Bosch Gmbh Robert | Kraftstoffeinspritzanlage |
US4519371A (en) * | 1981-11-04 | 1985-05-28 | Honda Giken Kogyo Kabushiki Kaisha | Mounting device for fuel injection nozzles for internal combustion engines |
US4556034A (en) * | 1983-06-25 | 1985-12-03 | Harley-Davidson Motor Co., Inc. | Fuel supply device for internal combustion engines |
US5394850A (en) * | 1993-11-19 | 1995-03-07 | Siemens Electric Limited | Top-feed fuel injector mounting in an integrated air-fuel system |
JPH08312503A (ja) | 1995-03-10 | 1996-11-26 | Mitsubishi Motors Corp | 固定対象物、特に筒内噴射型内燃機関用インジェクタの取付構造 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4201172A (en) * | 1972-07-10 | 1980-05-06 | Robert Bosch Gmbh | Fuel injection nozzle assembly for internal combustion engines |
US4445713A (en) * | 1982-07-19 | 1984-05-01 | Caterpillar Tractor Co. | Bulkhead-fluid-line connector |
US4693223A (en) * | 1984-06-21 | 1987-09-15 | General Motors Corporation | Fuel injection valve connection |
US5765534A (en) * | 1996-12-10 | 1998-06-16 | Caterpillar Inc. | Loading absorbing jumper tube assembly |
US5752487A (en) * | 1997-06-11 | 1998-05-19 | Caterpillar Inc. | Injector combustion gas seal |
-
1997
- 1997-06-13 DE DE19725076A patent/DE19725076A1/de not_active Withdrawn
-
1998
- 1998-03-19 KR KR1019997001140A patent/KR20000068117A/ko not_active Application Discontinuation
- 1998-03-19 US US09/242,223 patent/US6102007A/en not_active Expired - Fee Related
- 1998-03-19 JP JP11503511A patent/JP2000517028A/ja active Pending
- 1998-03-19 WO PCT/DE1998/000810 patent/WO1998058169A1/de not_active Application Discontinuation
- 1998-03-19 DE DE59806710T patent/DE59806710D1/de not_active Expired - Lifetime
- 1998-03-19 EP EP98925412A patent/EP0918928B1/de not_active Expired - Lifetime
- 1998-03-19 AU AU77561/98A patent/AU733211B2/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2416803A1 (de) * | 1974-04-06 | 1975-10-16 | Daimler Benz Ag | Elektronisch gesteuerte benzin-einspritzanlage |
DE2908095A1 (de) | 1979-03-02 | 1980-09-04 | Bosch Gmbh Robert | Kraftstoffeinspritzanlage |
US4519371A (en) * | 1981-11-04 | 1985-05-28 | Honda Giken Kogyo Kabushiki Kaisha | Mounting device for fuel injection nozzles for internal combustion engines |
US4556034A (en) * | 1983-06-25 | 1985-12-03 | Harley-Davidson Motor Co., Inc. | Fuel supply device for internal combustion engines |
US5394850A (en) * | 1993-11-19 | 1995-03-07 | Siemens Electric Limited | Top-feed fuel injector mounting in an integrated air-fuel system |
JPH08312503A (ja) | 1995-03-10 | 1996-11-26 | Mitsubishi Motors Corp | 固定対象物、特に筒内噴射型内燃機関用インジェクタの取付構造 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 097, no. 003 31 March 1997 (1997-03-31) * |
Also Published As
Publication number | Publication date |
---|---|
AU733211B2 (en) | 2001-05-10 |
DE59806710D1 (de) | 2003-01-30 |
EP0918928B1 (de) | 2002-12-18 |
EP0918928A1 (de) | 1999-06-02 |
US6102007A (en) | 2000-08-15 |
DE19725076A1 (de) | 1998-12-17 |
AU7756198A (en) | 1999-01-04 |
KR20000068117A (ko) | 2000-11-25 |
JP2000517028A (ja) | 2000-12-19 |
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