EP1332281A2 - Brennstoffeinspritzanlage - Google Patents
BrennstoffeinspritzanlageInfo
- Publication number
- EP1332281A2 EP1332281A2 EP01993758A EP01993758A EP1332281A2 EP 1332281 A2 EP1332281 A2 EP 1332281A2 EP 01993758 A EP01993758 A EP 01993758A EP 01993758 A EP01993758 A EP 01993758A EP 1332281 A2 EP1332281 A2 EP 1332281A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- injection system
- fuel
- outer sleeve
- inlet section
- 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.)
- Granted
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
- 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
- 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
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.
- a fuel injection system is known from DE 197 25 076 AI.
- annular seal carrier For the sealing connection between a fuel injection valve and an associated connecting piece of a fuel distributor line, it each has an annular seal carrier, which has a first sealing element for sealing the seal carrier against an end face of an inlet section of the fuel injector and with a second sealing element for sealing the seal carrier against the connecting piece of the fuel distributor line interacts.
- a insertable into a fuel inlet opening of the inlet section penetrates the annular seal carrier, so that the seal carrier between an upstream collar Socket and the inlet section of the fuel injector is locked in the radial direction.
- a disadvantage of the arrangement described in the abovementioned publication is that a total of two sealing elements provide two components on which errors can occur and, in particular, leaks can occur.
- the two sealing elements are mounted on top of each other and therefore require an overall height. Since the sealing elements cannot lie directly against one another and sufficient material must be available in order to be able to form the annular grooves, the additional overall height required for the seal carrier is not insignificant.
- Another disadvantage of the arrangement described in the above-mentioned document is that the radial mobility of the seal carrier is only guaranteed if it still has a certain axial play and is not pressed against the inlet section by the bushing. Consequently, the socket must be inserted into the fuel inlet opening at a precisely defined depth during assembly and the socket as well as the fuel inlet opening in the fuel injection valve must be manufactured very precisely.
- JP-OS 08-312503 It is already known from JP-OS 08-312503 to seal a fuel injector which can be inserted into a receiving bore and has an inlet section by means of an O-ring on this inlet section with respect to a connecting piece of a fuel distributor line.
- the O-ring seals against an inner wall of the connecting piece.
- Position deviations of the fuel injector compared to the fuel rail as far as the axes of the connecting piece of the fuel rail and of the fuel injector are shifted against each other, can only be compensated for by asymmetrical squeezing of the O-ring. This leads to leaks even with relatively little crushing of the O-ring.
- the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that positional deviations of the axes of the connecting piece of the fuel rail and the fuel injector are reliably compensated for each other. Undesired tensioning of the fuel injection valve in relation to the fuel distributor line can thereby be avoided. Above all, a smaller size is achieved compared to the known seals, which can compensate for tolerances.
- the inner sleeve and outer sleeve are connected via spiral springs.
- the seal carrier is expediently fixed by a locking ring on the guide section of the fuel injection valve with its inner sleeve against the end face of the inlet section.
- a gap also remains cheap due to the elasticity of the sealing element, even when pressurized fuel is applied, between the end face of the inlet section and the outer sleeve of the seal carrier. Even if the inner sleeve is pressed against the end face by the locking ring due to manufacturing tolerances, the outer ring with the sealing element remains functional.
- a hollow screw serves as the guide section, which is screwed into a threaded bore of the fuel injector and holds the seal carrier against the fuel injector.
- the outer ring favorably has an upstream, radially outer, circumferential, conical bevel. This facilitates the insertion of the seal carrier into the connecting piece.
- Fig. 1 shows a section through an embodiment of the invention in an excerpt of the connection area between the fuel injector and the
- Figure 2 is a top view of a seal carrier of the exemplary embodiment shown in Figure 1; Fig. 3 in supervision an alternative embodiment of a seal carrier / and
- FIG. 4 shows a further embodiment of a fuel injection system according to the invention in a detail corresponding to section IV of FIG. 1.
- Fig. 1 shows a sectional view of an embodiment of the invention
- Fuel injection system in a partial representation of the connection area between a fuel injection valve 1 and a fuel distribution line 2.
- the fuel distribution line 2 is shown here only in the area of a connecting piece 3 and the fuel injection valve 1 only in the area of an inlet section 4, which has a guide section 5.
- the inlet section 4 is formed in one piece with the fuel injection valve 1. An end face 6 is formed at the transition of the inlet section 4 to the guide section 5.
- a fuel inlet bore 7 of the fuel injector 1 penetrates the guide section 5 and the inlet section 4.
- a seal carrier 30 consists of an inner sleeve 8 and an outer sleeve 9, which radially surrounds the inner sleeve 8 and is elastically connected to the inner sleeve 8 via spirally arranged leaf springs 10.
- the inner sleeve 8 is penetrated and guided by the guide section 5.
- the inner sleeve 8 is held in position by a locking ring 11 and pressed against the end face 6 of the inlet section 4.
- the locking ring 11 is inserted into a circumferential groove 12 of the guide section 5.
- an O-ring 14 is used as a sealing element.
- a dead space 15 formed between the outer sleeve 9 and the O-ring 14 is connected to the fuel chamber 17 to be sealed via a pressure compensation bore 16.
- the dead space 15 is formed between sealing edges 18, 19 of the O-ring 14 with respect to the gradation 13 of the outer sleeve 9.
- the outer sleeve 9 has a circumferential conical bevel 23 at its upstream end.
- a central axis 24 is drawn through the fuel injector 1 for clarification.
- a central axis 25 is drawn through the connecting piece 3. Due to finished tolerance, the axes 24, 25 can be offset by the dimension a.
- the outer sleeve 9 is connected to the inner sleeve 8 only elastically via the leaf springs 10, such that only small forces are transmitted in the axial direction. Regardless of whether and with what force the inner sleeve 8 is pressed against the end face 6, a gap b is formed between the outer sleeve 9 and the end face 6, the size of which depends on the elasticity of the O-ring 14 and the prevailing pressure in the fuel chamber 17. As a result, the outer sleeve 9 is slightly radially displaceable. In connection with the bevel 23, the outer sleeve 9 adjusts to the offset a during assembly. This is possible as long as the axial sealing edge 20 is still completely on the end face 6.
- FIG. 2 shows a top view of the seal carrier 30 from FIG. 1 with a design of leaf springs 26 according to the invention.
- the outer sleeve 9 concentrically surrounds the inner sleeve 8. Both are elastically connected to one another via the leaf springs 26, which are directed radially outwards and are shown in FIG Training have a fold.
- FIG. 3 shows a top view of the seal carrier 30 from FIG. 1 with a further design of leaf springs 27 according to the invention.
- the outer sleeve 9 concentrically surrounds the inner sleeve 8. Both are connected to one another via the leaf springs 27, which are designed as spiral spring leaves directed radially outward.
- FIG. 4 shows a further embodiment of a fuel injection system according to the invention in a detail corresponding to section IV of FIG. 1. Since the embodiment differs only in this detail from the embodiment as shown in FIG. 1, the same reference numerals are used for identical parts ,
- the seal carrier 30 consists of the inner sleeve 8 and the outer sleeve 9, which radially encompasses the inner sleeve 8 and is elastically connected to the inner sleeve 8 via spirally arranged leaf springs 10.
- a locking ring 28, which sits in the groove 12, holds the inner sleeve 8 and the outer sleeve 9 against the end face 6.
- the O-ring 14 located in the gradation 13 of the outer sleeve 9 is supported by a support ring 29, which is between the O-ring 14 and the end face 6 is arranged, supported.
- the O-ring 14 lies sealingly on the connecting piece 3.
- the outer sleeve 9 is held in its position more securely.
- the support ring 29 of the O-ring '14 can be deformed more, without causing leaks.
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)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10056005 | 2000-11-11 | ||
DE10056005A DE10056005A1 (de) | 2000-11-11 | 2000-11-11 | Brennstoffeinspritzanlage |
PCT/DE2001/004206 WO2002038943A2 (de) | 2000-11-11 | 2001-11-12 | Brennstoffeinspritzanlage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1332281A2 true EP1332281A2 (de) | 2003-08-06 |
EP1332281B1 EP1332281B1 (de) | 2006-02-22 |
Family
ID=7662992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01993758A Expired - Lifetime EP1332281B1 (de) | 2000-11-11 | 2001-11-12 | Brennstoffeinspritzanlage |
Country Status (6)
Country | Link |
---|---|
US (1) | US6701899B2 (de) |
EP (1) | EP1332281B1 (de) |
JP (1) | JP4021762B2 (de) |
DE (2) | DE10056005A1 (de) |
ES (1) | ES2257464T3 (de) |
WO (1) | WO2002038943A2 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10056038A1 (de) * | 2000-11-11 | 2002-05-16 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
DE102007035714A1 (de) * | 2007-07-30 | 2009-02-05 | Robert Bosch Gmbh | Brennstoff-Einspritzanlage mit Ausgleichselement |
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 |
US8069842B2 (en) * | 2009-07-02 | 2011-12-06 | Robert Bosch Gmbh | Injector mounting assembly |
US20110265767A1 (en) * | 2010-05-03 | 2011-11-03 | Delphi Technologies, Inc. | Isolater for fuel injector |
DE102011082743A1 (de) * | 2011-09-15 | 2013-03-21 | Robert Bosch Gmbh | Brennstoffverteiler |
FR2997456B1 (fr) | 2012-10-30 | 2014-11-28 | Delphi Technologies Holding | Vanne haute pression |
DE102013200993A1 (de) * | 2013-01-22 | 2014-07-24 | Robert Bosch Gmbh | Brennstoffeinspritzanlage mit einer Brennstoff führenden Komponente, einem Brennstoffeinspritzventil und einer Aufhängung |
DE102013222508B4 (de) | 2013-11-06 | 2023-07-27 | Robert Bosch Gmbh | Ventil zum Zumessen von unter Hochdruck stehendem Fluid |
US10544771B2 (en) * | 2017-06-14 | 2020-01-28 | Caterpillar Inc. | Fuel injector body with counterbore insert |
US11174825B2 (en) * | 2019-02-11 | 2021-11-16 | Caterpillar Inc. | Seal configuration for fuel injector |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US5752487A (en) * | 1997-06-11 | 1998-05-19 | Caterpillar Inc. | Injector combustion gas seal |
DE19725076A1 (de) * | 1997-06-13 | 1998-12-17 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
DE19735665A1 (de) | 1997-06-25 | 1999-01-07 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
JP2000018125A (ja) * | 1998-07-01 | 2000-01-18 | Mitsubishi Electric Corp | 筒内噴射用燃料噴射弁 |
-
2000
- 2000-11-11 DE DE10056005A patent/DE10056005A1/de not_active Withdrawn
-
2001
- 2001-11-12 JP JP2002541240A patent/JP4021762B2/ja not_active Expired - Fee Related
- 2001-11-12 EP EP01993758A patent/EP1332281B1/de not_active Expired - Lifetime
- 2001-11-12 ES ES01993758T patent/ES2257464T3/es not_active Expired - Lifetime
- 2001-11-12 US US10/169,967 patent/US6701899B2/en not_active Expired - Lifetime
- 2001-11-12 DE DE50109021T patent/DE50109021D1/de not_active Expired - Lifetime
- 2001-11-12 WO PCT/DE2001/004206 patent/WO2002038943A2/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO0238943A2 * |
Also Published As
Publication number | Publication date |
---|---|
DE50109021D1 (de) | 2006-04-27 |
JP2004513293A (ja) | 2004-04-30 |
ES2257464T3 (es) | 2006-08-01 |
US6701899B2 (en) | 2004-03-09 |
WO2002038943A2 (de) | 2002-05-16 |
EP1332281B1 (de) | 2006-02-22 |
JP4021762B2 (ja) | 2007-12-12 |
WO2002038943A3 (de) | 2002-08-15 |
DE10056005A1 (de) | 2002-05-16 |
US20030145831A1 (en) | 2003-08-07 |
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