EP0941399A1 - Wärmeschutzhülse - Google Patents
WärmeschutzhülseInfo
- Publication number
- EP0941399A1 EP0941399A1 EP98943654A EP98943654A EP0941399A1 EP 0941399 A1 EP0941399 A1 EP 0941399A1 EP 98943654 A EP98943654 A EP 98943654A EP 98943654 A EP98943654 A EP 98943654A EP 0941399 A1 EP0941399 A1 EP 0941399A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat protection
- section
- protection sleeve
- nozzle body
- sleeve according
- 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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/04—Injectors with heating, cooling, or thermally-insulating means
Definitions
- the invention relates to a heat protection sleeve for a fuel injection valve which can be inserted into a receiving bore of a cylinder head of an internal combustion engine for the direct injection of fuel into the combustion chamber of the internal combustion engine, in particular for a gasoline direct injection valve or diesel direct injection valve.
- the invention is based on a heat protection sleeve according to the preamble of the main claim. It is already known from DE 30 00 061 C2 to provide a heat protection sleeve on the nozzle body of a fuel injector. A flange of the heat protection sleeve is inserted into an inner groove of the fuel injection valve and sealed against the receiving bore of the cylinder head by means of a sealing ring. At the spray end, the heat protection sleeve has an annular, inwardly bent collar, on which an elastic heat protection ring is supported. The heat protection ring is arranged between the spray-side end of the nozzle body of the fuel injector and the annular, inwardly bent collar of the heat protection sleeve.
- a resilient heat protection member inserted between an end face of the nozzle body and a collar of a clamping nut is formed as a disk-shaped heat protection ring made of a heat-insulating material.
- this inside is surrounded by a ring made of a thin metal sheet with a U-shaped cross section.
- a disadvantage of the generic heat protection sleeve is that it requires a relatively large amount of assembly work, since the heat protection sleeve must be preassembled on the fuel injector.
- the heat protection sleeve according to the invention with the characterizing features of the main claim has the advantage that the assembly is made considerably easier.
- the heat protection sleeve according to the invention is radially elastic in this area by means of a folded section.
- the heat protection sleeve therefore rests elastically in the region of the folded section both on the nozzle body of the fuel injection valve and on the receiving bore of the cylinder head.
- An axial force transmission from the nozzle body of the fuel injector to the heat protection sleeve is made possible by a conical section of the heat protection sleeve, which lies closely against a tapering section of the nozzle body.
- the conical shape ensures self-centering.
- the conical design causes a certain expansion of the radially elastic, folded section during assembly, so that the axial assembly force is reduced.
- the folded section ensures that the receiving bore of the cylinder head is adequately sealed against the combustion gases generated in the combustion chamber of the internal combustion engine. An additional sealing ring is not required for the seal. Due to the elastic contact of the folded section both on the nozzle body of the fuel injection valve and on the receiving bore of the cylinder head, good heat coupling between the nozzle body of the fuel injection valve and the cylinder head is achieved, which counteracts overheating of the nozzle body.
- the sleeve body has a hollow cylindrical section, the inside diameter of which is dimensioned larger than the outside diameter of the section of the nozzle body which is inserted into the hollow cylindrical section in the assembled state, there is sufficient play in this area between the nozzle body of the fuel injector and the receiving bore in the cylinder head.
- a collar formed on the end opposite the injection-side end results in a stop of the heat protection sleeve at a step of the receiving bore of the cylinder head, which is designed as a stepped bore and which defines the final assembly position of the fuel injection valve in the heat protection sleeve.
- the sleeve body and the collar can preferably be designed as a one-piece, deep-drawn sheet metal part, which is particularly inexpensive to manufacture.
- the folded section is also inexpensive to manufacture by flanging or bending.
- FIG. 1 with a heat protection sleeve according to the invention in a
- FIG. 2 is an enlarged view of section II in FIG .. 1
- a cylinder head 1 of an internal combustion engine is shown partially cut.
- a receiving bore 2 is formed as a stepped bore, which extends symmetrically to a longitudinal axis 4 up to a combustion chamber 3.
- a Fuel injector 5 used in the receiving bore 2 of the cylinder head 1 is a Fuel injector 5 used.
- the fuel injector 5 is used for the direct injection of fuel, for. B. gasoline or diesel fuel, in the combustion chamber 3 of the internal combustion engine.
- the fuel injection valve 5 can preferably be actuated electromagnetically via an electrical connecting cable 6.
- the fuel enters the fuel injection valve 5 via a fuel inlet connection 7.
- the fuel injection valve 5 has a nozzle body 9 which has one or more spray openings for injecting the fuel into the combustion chamber 3 of the internal combustion engine.
- a conical section 10 tapering in the direction of the spray-side end 8 is formed.
- a heat protection sleeve 11 shown in section and designed in accordance with the invention, is provided in the receiving bore 2.
- the heat protection sleeve 11 is divided into a sleeve body 12 which extends essentially axially to the longitudinal axis 4 and an upper collar 13 which preferably projects radially outward to the longitudinal axis 4 of the sleeve body 12.
- the sleeve body 12 and the collar 13 can be complete as a circumferential, circumferential direction closed body be formed.
- the collar 13 is supported on a first step 14 of the receiving bore 2 of the cylinder head 1 designed as a step bore and thus places the insertion depth of the sleeve body 12 in a step 15, which is designed as a step bore, between the first step 14 and a second step 15 closer to the combustion chamber 3
- Receiving bore 2 extending portion 16 of the receiving bore 2 fixed.
- the section 16 can have a section 17 tapering in the direction of the combustion chamber 3 near the step 14, whereby the insertion of the heat protection sleeve 11 and the nozzle body 9 of the fuel injection valve 5 is facilitated.
- the sleeve body 12 has a folded-over section 19 which is preferably formed in two layers.
- the folded section is e.g. B. can be produced by bending or flanging.
- a conical section 20 tapering in the direction of the spray-side end 18 is provided, which, in the assembled state, lies closely against the tapered, conical section 10 of the nozzle body 9 of the fuel injection valve 5.
- FIG. 2 shows the region II in FIG. 1 on an enlarged scale.
- already elements described are provided with the same reference numerals, so that a repetitive description is unnecessary.
- the folded section 19 is bent in a U-shape at the spray-side end 18 of the sleeve body 12, so that the sleeve body 12 is formed in two layers in the area of the folded section 19.
- an inner layer 30 rests elastically close to the nozzle body 9, while an outer layer 31 of the section 19, which is preferably folded outward, rests elastically close to the receiving bore 2 of the cylinder head 1. Due to the close contact of the inner layer 30 on the nozzle body 9 and the outer layer 31 on the receiving bore 2, good heat coupling of the nozzle body 9 with the cylinder head 1 is achieved in this area and overheating of the areas of the fuel injector which are further upstream and remote from the combustion chamber 3 5 counteracted.
- a gap 32 is preferably formed between the inner layer 30 and the outer layer 31 of the folded section 19, as a result of which the radial elasticity of the folded section 19 is further improved.
- a distance a is preferably provided, so that the assembly end position of the heat protection sleeve 11 in the receiving bore 2 by the stop of the collar 13 on the first stage 14 of the receiving bore 2 is clearly defined.
- the assembly end position is predetermined by a stop of the spray-side end 18 of the sleeve body 12 on the second step 15 of the receiving bore 2. The collar 13 can then be omitted.
- the conical section 20 is preferably arranged immediately adjacent to the folded, two-layer section 19, so that a slight elastic expansion of the folded section 19 is brought about during assembly, as a result of which the axial assembly force is reduced.
- the folded section 19 Due to the close contact of the inner layer 30 of the folded section 19 on the nozzle body 9 and the outer layer 31 of the folded section 19 on the receiving bore 2 of the cylinder head 1, an effective seal between the nozzle body 9 and the cylinder head 1 against that in the combustion chamber 3 generated combustion gases achieved.
- An additional component in particular an additional sealing ring, is not required. Since the folded section 19 is preferably made of metal, the seal formed by the folded section 19 is also extremely heat-resistant in comparison with a sealing ring formed from a rubber-elastic material.
- the sleeve body 12 preferably has a hollow cylindrical section 33 on the side of the conical section 20 remote from the folded section 19.
- the hollow cylindrical section 33 does not lie closely and flush against the nozzle body 9 of the fuel injection valve 5, but is spaced apart from the nozzle body 9 by an annular gap 34.
- the gap 34 arises because the hollow cylindrical section 33 has an inner diameter D that is larger than the outer diameter d of the region of the nozzle body 9 enclosed by the hollow cylindrical section 33.
- the hollow cylindrical section 33 can lie flush with the receiving bore 2 of the cylinder head 1.
- the Hülsenkö ⁇ er 12 can be formed together with the collar 13 as a one-piece sheet metal part.
- the heat protection sleeve 11 according to the invention can therefore be manufactured by deep drawing or by rolling in an inexpensive, fully or partially automatic manufacturing process. A complex pre-assembly of the heat protection sleeve 11 according to the invention on the fuel injection valve 5 is not necessary.
- the heat protection sleeve 11 is at least partially pushed onto the nozzle body 9 of the fuel injection valve 5 and the unit consisting of the fuel injection valve 5 and the heat protection sleeve 11 is inserted into the receiving bore 2 or the heat protection sleeve 11 is inserted into the receiving bore 2 before the nozzle body 9 into the Location hole 2 is inserted.
- the elasticity achieved by the folded section 19 Heat protection sleeve 11 limits the required assembly force to be applied in the axial direction.
- the heat protection sleeve 11 combines the functions of facilitated assembly, an effective seal against the combustion gases and effective heat dissipation.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19743103 | 1997-09-30 | ||
DE19743103A DE19743103A1 (de) | 1997-09-30 | 1997-09-30 | Wärmeschutzhülse |
PCT/DE1998/001888 WO1999017015A1 (de) | 1997-09-30 | 1998-07-08 | Wärmeschutzhülse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0941399A1 true EP0941399A1 (de) | 1999-09-15 |
EP0941399B1 EP0941399B1 (de) | 2003-01-15 |
Family
ID=7844082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98943654A Expired - Lifetime EP0941399B1 (de) | 1997-09-30 | 1998-07-08 | Wärmeschutzhülse |
Country Status (5)
Country | Link |
---|---|
US (1) | US6196195B1 (de) |
EP (1) | EP0941399B1 (de) |
JP (1) | JP2001508520A (de) |
DE (2) | DE19743103A1 (de) |
WO (1) | WO1999017015A1 (de) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001132582A (ja) * | 1999-11-10 | 2001-05-15 | Mitsubishi Electric Corp | 筒内噴射用燃料噴射弁 |
DE19962968A1 (de) | 1999-12-24 | 2001-06-28 | Bosch Gmbh Robert | Ausgleichselement |
US6408801B1 (en) * | 2000-04-26 | 2002-06-25 | Delphi Technologies, Inc. | Method for dissipating heat at the tip of a fuel injector |
DE10027669A1 (de) * | 2000-06-03 | 2001-12-06 | Bosch Gmbh Robert | Befestigungsmittel für ein Brennstoffeinspritzventil |
DE10027662A1 (de) | 2000-06-03 | 2001-12-06 | Bosch Gmbh Robert | Dichtmittel und Niederhalter für ein Brennstoffeinspritzventil |
DE10038763A1 (de) * | 2000-08-09 | 2002-02-21 | Bosch Gmbh Robert | Ausgleichselement für ein Brennstoffeinspritzventil |
US7028918B2 (en) | 2001-02-07 | 2006-04-18 | Cummins Engine Company, Inc. | Fuel injector having a nozzle with improved cooling |
DE10108194A1 (de) | 2001-02-21 | 2002-08-29 | Bosch Gmbh Robert | Dichtvorrichtung für ein Brennstoffeinspritzventil |
US7070126B2 (en) | 2001-05-09 | 2006-07-04 | Caterpillar Inc. | Fuel injector with non-metallic tip insulator |
US6959695B2 (en) | 2001-10-17 | 2005-11-01 | Robert Bosch Corporation | Multi-point fuel injection module |
DE10200044A1 (de) * | 2002-01-03 | 2003-07-24 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
US6799541B1 (en) | 2002-10-25 | 2004-10-05 | Darton International, Inc. | Cylinder sleeve with coolant groove |
CN100422539C (zh) * | 2002-10-31 | 2008-10-01 | 浙江飞亚电子有限公司 | 电控燃油喷射四冲程汽油发动机 |
US6845758B2 (en) * | 2003-02-19 | 2005-01-25 | International Engine Intellectual Property Company, Llc | Fuel injector retainer assembly |
DE112004000356D2 (de) | 2003-03-27 | 2006-02-23 | Siemens Ag | Direkt-Einspritzventil in einem Zylinderkopf |
US7007674B2 (en) | 2003-04-01 | 2006-03-07 | Robert Bosch Corporation | Fuel rail assembly |
US20050051138A1 (en) * | 2003-09-08 | 2005-03-10 | Robert Bosch Corporation | Intake manifold assembly |
DE10345965A1 (de) * | 2003-10-02 | 2005-07-07 | Parker Hannifin Gmbh | Brennstoffeinspritzventil |
DE102005006818A1 (de) * | 2005-02-15 | 2006-08-17 | Volkswagen Mechatronic Gmbh & Co. Kg | Dichtungseinrichtung für einen Kraftstoffinjektor sowie Verfahren zum Abdichten |
US7484499B2 (en) * | 2007-04-03 | 2009-02-03 | Gm Global Technology Operations, Inc. | Combustion seal |
DE102007035714A1 (de) * | 2007-07-30 | 2009-02-05 | Robert Bosch Gmbh | Brennstoff-Einspritzanlage mit Ausgleichselement |
DE102007045258B4 (de) * | 2007-09-21 | 2017-06-14 | Volkswagen Ag | Brennkraftmaschine |
CN102510944B (zh) * | 2009-09-23 | 2014-07-09 | 康明斯知识产权有限公司 | 喷射器密封组件及相对于喷射器密封冷却剂通道的方法 |
US8960156B2 (en) * | 2011-02-28 | 2015-02-24 | Volvo Lastvagnar Ab | Injector sleeve |
AT512667B1 (de) | 2012-04-05 | 2014-03-15 | Bosch Gmbh Robert | Einspritzdüse zum Einspritzen von Medien in einen Brennraum |
JP6081095B2 (ja) * | 2012-07-17 | 2017-02-15 | Nok株式会社 | シール構造 |
JP5768800B2 (ja) | 2012-11-05 | 2015-08-26 | 株式会社デンソー | 燃料噴射装置 |
DE102013212321A1 (de) * | 2013-06-26 | 2014-12-31 | Robert Bosch Gmbh | Kraftstoffinjektor |
US10605213B2 (en) * | 2015-08-21 | 2020-03-31 | Cummins Inc. | Nozzle combustion shield and sealing member with improved heat transfer capabilities |
DE102015223605A1 (de) * | 2015-11-27 | 2017-06-01 | Robert Bosch Gmbh | Injektoranordnung mit Thermoschutzhülse |
DE102015225055A1 (de) * | 2015-12-14 | 2017-06-14 | Robert Bosch Gmbh | Kraftstoffinjektor |
US9976527B1 (en) * | 2017-01-13 | 2018-05-22 | Caterpillar Inc. | Fuel injector assembly having sleeve for directing fuel flow |
JP2018172972A (ja) * | 2017-03-31 | 2018-11-08 | 本田技研工業株式会社 | 燃料噴射弁の取付構造 |
DE102019124234A1 (de) * | 2019-09-10 | 2021-03-11 | Man Energy Solutions Se | Brennkraftmaschine |
FR3124233B1 (fr) * | 2021-06-22 | 2023-05-05 | Renault | Procédé de formage d’un dispositif de protection thermique |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2080189A (en) * | 1932-08-17 | 1937-05-11 | Daimler Benz Ag | Injection nozzle for internal combustion engines |
GB759524A (en) | 1952-12-30 | 1956-10-17 | Emmerich Satzger | An improved fuel injection nozzle for fuel injection internal combustion engines |
US2777431A (en) * | 1953-08-28 | 1957-01-15 | Maschf Augsburg Nuernberg Ag | Injection nozzle arrangement |
US3334617A (en) * | 1965-06-16 | 1967-08-08 | Gen Motors Corp | Engine with improved injector tube sealing |
US4201172A (en) * | 1972-07-10 | 1980-05-06 | Robert Bosch Gmbh | Fuel injection nozzle assembly for internal combustion engines |
DE2451458A1 (de) * | 1974-10-30 | 1976-05-06 | Bosch Gmbh Robert | Fluessigkeitsgekuehlte kraftstoffeinspritzduese fuer brennkraftmaschinen |
US3945353A (en) * | 1974-11-29 | 1976-03-23 | Allis-Chalmers Corporation | Two phase nozzle cooling system |
DE3000061C2 (de) * | 1980-01-03 | 1993-10-14 | Bosch Gmbh Robert | Kraftstoffeinspritzdüse für Brennkraftmaschinen |
DE3340445A1 (de) * | 1983-11-09 | 1985-05-15 | Motoren-Werke Mannheim AG vorm. Benz Abt. stationärer Motorenbau, 6800 Mannheim | Zylinderkopf |
DE3719458A1 (de) * | 1987-06-11 | 1988-12-29 | Bosch Gmbh Robert | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
DE19546134C1 (de) * | 1995-12-11 | 1997-01-30 | Daimler Benz Ag | Kraftstoffeinspritzdüse für Brennkraftmaschinen |
-
1997
- 1997-09-30 DE DE19743103A patent/DE19743103A1/de not_active Withdrawn
-
1998
- 1998-07-08 US US09/308,917 patent/US6196195B1/en not_active Expired - Fee Related
- 1998-07-08 WO PCT/DE1998/001888 patent/WO1999017015A1/de active IP Right Grant
- 1998-07-08 DE DE59806934T patent/DE59806934D1/de not_active Expired - Lifetime
- 1998-07-08 JP JP51954899A patent/JP2001508520A/ja not_active Withdrawn
- 1998-07-08 EP EP98943654A patent/EP0941399B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9917015A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6196195B1 (en) | 2001-03-06 |
DE59806934D1 (de) | 2003-02-20 |
JP2001508520A (ja) | 2001-06-26 |
EP0941399B1 (de) | 2003-01-15 |
DE19743103A1 (de) | 1999-04-01 |
WO1999017015A1 (de) | 1999-04-08 |
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