EP2834511A1 - Einspritzdüse zum einspritzen von medien in einen brennraum - Google Patents
Einspritzdüse zum einspritzen von medien in einen brennraumInfo
- Publication number
- EP2834511A1 EP2834511A1 EP13715648.5A EP13715648A EP2834511A1 EP 2834511 A1 EP2834511 A1 EP 2834511A1 EP 13715648 A EP13715648 A EP 13715648A EP 2834511 A1 EP2834511 A1 EP 2834511A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- injection nozzle
- protection sleeve
- heat protection
- sealing
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 45
- 238000002347 injection Methods 0.000 title claims abstract description 45
- 239000007924 injection Substances 0.000 title claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 72
- 239000000446 fuel Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000003993 interaction Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- BHMLFPOTZYRDKA-IRXDYDNUSA-N (2s)-2-[(s)-(2-iodophenoxy)-phenylmethyl]morpholine Chemical compound IC1=CC=CC=C1O[C@@H](C=1C=CC=CC=1)[C@H]1OCCNC1 BHMLFPOTZYRDKA-IRXDYDNUSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- 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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/04—Injectors with heating, cooling, or thermally-insulating 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
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/07—Nozzles and injectors with controllable fuel supply
- F02M2700/077—Injectors having cooling or heating means
Definitions
- Injection nozzle for injecting media into a combustion chamber
- the invention relates to an injection nozzle for injecting media into a combustion chamber, in particular of fuel into the combustion chamber of an internal combustion engine, comprising a nozzle body whose nozzle tip having the injection holes protrudes into the combustion chamber, a heat protection sleeve surrounding the nozzle body in the combustion chamber end region of the nozzle body. wherein the injection nozzle is inserted into a receiving bore of a holding part, in particular cylinder head, wherein the combustion chamber-side end region of the nozzle body interacts with the receiving bore with the interposition of the heat protection sleeve.
- Sleeves which surround the nozzle body of fuel injection nozzles, in particular gasoline direct injection valves or diesel direct injection valves, are already known. Their task is to surround the nozzle body as a cooling jacket. Furthermore, they also act as fastening means to fix the injection nozzle in the holding part, in particular in the cylinder head.
- a thermal protection sleeve is known, which is inserted into a stepped receiving bore of a cylinder head of an internal combustion engine and encloses a discharge-side nozzle body of a fuel injection valve used in the receiving bore circumferentially.
- Heat-insulating sleeves are not only used in injection nozzles for internal combustion engines, but also in various injection systems in other areas, for example in the chemical industry.
- the heat protection sleeve is usually made of copper or NiRo and covers the injector at the nozzle tip against heat input. Furthermore, it shrouds the injection nozzles along the nozzle shaft in order to transport the temperature along the sleeves away from the nozzle tip to a cooled region of the installation space, for example the cylinder head.
- the thermal protection sleeve is occasionally made in one piece with the water sleeve, which separates the cooling channels formed in the cylinder head from Injektorbauraum.
- a disadvantage of the conventional constructions that they require a larger through hole in the holding part, since the through hole not only the nozzle body, but in addition also the nozzle body enclosing heat protection sleeve is to receive. From the larger through-hole in turn results in a larger force which is exerted on the basis of the combustion chamber pressure from the side of the combustion chamber to the injection nozzle, since said force increases quadratically with the diameter of the bore.
- the injection nozzle can be formed at its tip with a chamfer, via which it rests on the holding part with the interposition of a sealing washer or the heat protection sleeve.
- this has the disadvantage that the clamping force with which the injection nozzle is clamped in the holding part is introduced on a relatively small diameter, which leads to disadvantageously high local stresses and deformations of the injection nozzle or the holding part.
- the thermal protection sleeve has a first and a second region, which are axially spaced from each other, wherein the second region is arranged closer to the nozzle tip than the first region, wherein in the first region on the outer shell, a first outer circumferential Sealing surface and the inner shell, a first inner circumferential sealing surface are formed and in the second region on the outer shell, a second outer circumferential sealing surface and the inner shell, a second inner circumferential sealing surface are formed, wherein the second sealing surfaces are smaller in diameter than the first sealing surfaces, wherein the first outer and the second outer sealing surface each sealingly cooperate with a running in a radial plane, annular seating surface or with a tapered seat surface of the receiving bore and the first inner and the second inner sealing surface each sealing with e iner in a radial plane extending, annular seat surface or with a conical seat surface of the nozzle body interact.
- the invention thus relates to designing a thermal protection sleeve in such a way that it preferably rests on the cylinder head both at the nozzle tip and at an upper sealing point on the cylinder head, wherein the thermal protection sleeve rests on the nozzle tip on a smaller diameter than on the upper one Sealing point, so that an installation of the side facing away from the combustion chamber is made possible.
- this results in a very small surface of the nozzle, which is exposed to the combustion chamber heat and a seal against the combustion chamber pressure in a very small area, whereby the "blow by" inclination, ie the risk that escapes combustion chamber pressure between injector and cylinder head, significantly reduced is.
- Another advantage is that when mounting on the nozzle tip, a surface pressure is produced, which is sufficient to seal against the combustion chamber pressure, wherein at the above-lying sealing point, the remaining clamping force of the injector voltage is added.
- the clamping force with which the injection nozzle is clamped in the cylinder head is thus at least partially introduced on a larger diameter, namely at the upper sealing point, so that the resulting stresses in the nozzle body or in the cylinder head and deformations can be reduced.
- the first sealing surfaces and the second sealing surfaces form a double fit, whereby a particularly effective fixing of the injection nozzle is achieved at two regions which are defined by the double fit.
- the heat protection sleeve Since a deformation of the heat protection sleeve usually occurs when inserting the heat protection sleeve to compensate for component tolerances, the heat protection sleeve is according to a preferred development in the inserted state in the holding part of the injector under bias.
- the heat protection sleeve is preferably made of a deformable material, so that the sealing surfaces are pressed when mounting on the seating surfaces, that the second sealing surfaces interact with the seat surfaces to form a surface pressure and that on the first sealing surfaces and the Corresponding seats the rest of the clamping force of the nozzle voltage is absorbed, whereby the heat protection sleeve with respect to the production costs and the corresponding costs can be made cheaper and the exact fit is achieved only when inserting by deformation of the selected material.
- At least one of the seats provided in the receiving bore is formed at a stage of the receiving bore, the receiving bore thus has a protruding from the axial direction of the bore shoulder, the axial component of the combustion chamber pressure of the Injector kept away and the "blow by" - inclination is further reduced.
- At least one of the seat surfaces provided on the nozzle body is formed on the nozzle retaining nut.
- the second sealing surfaces are formed at the combustion chamber end of the heat protection sleeve, so that the area exposed to the combustion chamber is further minimized.
- the cooperation of the second sealing surfaces with the seating surfaces preferably produces the combustion chamber-side sealing of the nozzle body in the receiving bore.
- the invention is preferably further developed such that the heat protection sleeve arranged in an axial section between the first sealing surfaces and the second sealing surfaces at a radial distance from the nozzle body and the wall of the receiving bore is.
- the invention is preferably further developed such that the heat protection sleeve consists of a material with high thermal conductivity, in particular a thermal conductivity of greater than 100 W / (mK), in particular of copper or a copper alloy ,
- the heat protection sleeve is integrally formed with a water sleeve, which surrounds the nozzle body and limits a holding part arranged in the cooling channel with respect to the nozzle body.
- the second sealing surfaces have at least one protruding, circumferential edge, in particular biting edges.
- the heat protection sleeve between the inner and the outer second sealing surface has an open towards the combustion chamber side end, extending in the circumferential direction groove or a slot.
- FIG. 1 is a sectional view of a water-cooled cylinder head with inserted injection nozzle and heat protection sleeve
- Fig. 2 is an exploded view of the embodiment of FIG. 1
- Fig. 3 shows an embodiment in which the heat protection sleeve is the same water sleeve
- Fig. 4 shows a preferred embodiment the heat protection sleeve with B sulfur
- Fig. 5 is a slotted embodiment of the heat protection sleeve.
- the injection nozzle according to the invention wherein a heat protection sleeve 2 between the cylinder head 3 and the nozzle body 4 is arranged.
- the heat protection sleeve 2 has a first outer sealing surface 5 and a first inner sealing surface 6 in a first sealing region.
- the first outer sealing surface 5 sealingly cooperates with an annular seating surface 8 of the receiving bore 7 extending in a radial plane.
- the first inner sealing surface 6 sealingly cooperates with an annular seat surface 9 of the nozzle retaining nut 14 which extends in a radial plane.
- the second outer sealing surface 10 acts sealingly with a tapered seat 12 of the receiving bore 7 together.
- the second inner sealing surface 11 sealingly cooperates with a conical seat surface 13 of the nozzle body 4 or the nozzle tip 15.
- the first and second sealing surfaces together with the corresponding seating surfaces of the receiving bore 7 and of the nozzle body 4, form a double fit.
- Double fits generally has the problem that, depending on manufacturing tolerances, more or less pronounced stresses result in the component concerned, which can change at the slightest environmental change (eg thermal expansion), resulting in random and therefore unpredictable states. Due to these indeterminabilities in the case of double fits, the extent of the surface pressure, for example in the second sealing area, ie at the nozzle tip, can not be controlled, resulting in the risk of leakage.
- the heat-insulating sleeve preferably consists of a soft metal, in particular a metal with a Mohs hardness of ⁇ 4, such as e.g. Copper or its alloys, so that deforms the heat protection sleeve when inserting the injection nozzle and thereby the component tolerances are compensated and a surface pressure is achieved especially in the second sealing area.
- the Injektorklemmkraft is hereby partly taken in the second sealing area and partly in the first sealing area.
- the combustion chamber pressure, which is symbolized by the arrow 16 is more than compensated by the injector clamping force, which is symbolized by the arrow 17, and the nozzle body 4 is thus held in the cylinder head 3.
- the heat protection sleeve 2 Due to the inventive design of the heat protection sleeve 2, the largest area of the nozzle tip 15 of the nozzle body 4 is protected from the heat of the combustion chamber 17. 18, the injection jet of the injection nozzle 1 is shown schematically.
- a water sleeve 19 separates a water-filled cooling channel 20, which is arranged in the cylinder head 3, from the nozzle body 4.
- the heat protection sleeve 2 and the water protection sleeve are integrally formed, whereby the water in the cooling channel 20 and the heat protection sleeve 2 cools, whereby an improved dissipation of heat from the nozzle tip is achieved.
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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA413/2012A AT512667B1 (de) | 2012-04-05 | 2012-04-05 | Einspritzdüse zum Einspritzen von Medien in einen Brennraum |
PCT/EP2013/056770 WO2013149954A1 (de) | 2012-04-05 | 2013-03-28 | Einspritzdüse zum einspritzen von medien in einen brennraum |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2834511A1 true EP2834511A1 (de) | 2015-02-11 |
EP2834511B1 EP2834511B1 (de) | 2019-05-08 |
Family
ID=48087550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13715648.5A Active EP2834511B1 (de) | 2012-04-05 | 2013-03-28 | Einspritzdüse zum einspritzen von medien in einen brennraum |
Country Status (4)
Country | Link |
---|---|
US (1) | US9382888B2 (de) |
EP (1) | EP2834511B1 (de) |
AT (1) | AT512667B1 (de) |
WO (1) | WO2013149954A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013021261A1 (de) * | 2013-12-14 | 2015-06-18 | Daimler Ag | Kraftstoff-Einspritzdüse für eine Brennkraftmaschine |
AT517054B1 (de) * | 2015-04-14 | 2017-02-15 | Ge Jenbacher Gmbh & Co Og | Anordnung aus einem Zylinderkopf und einem Kraftstoffinjektor |
DE102015223605A1 (de) * | 2015-11-27 | 2017-06-01 | Robert Bosch Gmbh | Injektoranordnung mit Thermoschutzhülse |
US10041440B2 (en) * | 2015-12-02 | 2018-08-07 | Aaron Di Pietro | Fuel injector insert |
DE102015225055A1 (de) * | 2015-12-14 | 2017-06-14 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102016206796A1 (de) * | 2016-04-21 | 2017-10-26 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102018217768A1 (de) | 2018-10-17 | 2020-04-23 | Robert Bosch Gmbh | Injektoranordnung |
DE102019124234A1 (de) * | 2019-09-10 | 2021-03-11 | Man Energy Solutions Se | Brennkraftmaschine |
DE102020006653A1 (de) | 2020-10-30 | 2022-05-05 | Daimler Truck AG | Injektorhülse für einen Injektor, sowie Einblaseinrichtung und Verbrennungskraftmaschine |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR848063A (fr) | 1938-01-11 | 1939-10-23 | Saurer Ag Adolph | Dispositif de buses pour moteurs à injection de combustible |
DE974647C (de) | 1952-06-14 | 1961-03-16 | Maschf Augsburg Nuernberg Ag | Vom Kuehlmittel umspuelter, als duennwandiger Mantel ausgebildeter Duesenhalter fuerEinspritz-Brennkraftmaschinen |
US2887994A (en) * | 1957-05-23 | 1959-05-26 | Lister & Co Ltd R A | Fuel injector of air-cooled compression ignition engine |
DE7827497U1 (de) * | 1978-09-15 | 1980-03-06 | Robert Bosch Gmbh, 7000 Stuttgart | Waermeschutz fuer duesen von brennkraftmaschinen |
JPS5758770U (de) * | 1980-09-25 | 1982-04-07 | ||
US5494220A (en) * | 1994-08-08 | 1996-02-27 | Caterpillar Inc. | Fuel injector assembly with pressure-equalized valve seat |
JPH10252610A (ja) | 1997-01-13 | 1998-09-22 | Yamaha Motor Co Ltd | 筒内噴射エンジン |
JPH1121679A (ja) * | 1997-07-03 | 1999-01-26 | Sumitomo Electric Ind Ltd | セラミックス断熱部材で被覆した機械構造部品 |
DE19743103A1 (de) * | 1997-09-30 | 1999-04-01 | Bosch Gmbh Robert | Wärmeschutzhülse |
DE19838755B4 (de) * | 1998-08-26 | 2006-11-09 | Daimlerchrysler Ag | Auf den Brennraum einer Brennkraftmaschine einspritzende Kraftstoffeinspritzdüse |
-
2012
- 2012-04-05 AT ATA413/2012A patent/AT512667B1/de active
-
2013
- 2013-03-28 US US14/386,849 patent/US9382888B2/en active Active
- 2013-03-28 EP EP13715648.5A patent/EP2834511B1/de active Active
- 2013-03-28 WO PCT/EP2013/056770 patent/WO2013149954A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013149954A1 * |
Also Published As
Publication number | Publication date |
---|---|
AT512667A1 (de) | 2013-10-15 |
AT512667B1 (de) | 2014-03-15 |
US9382888B2 (en) | 2016-07-05 |
EP2834511B1 (de) | 2019-05-08 |
WO2013149954A1 (de) | 2013-10-10 |
US20150034051A1 (en) | 2015-02-05 |
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