EP3867519A1 - Injector arrangement - Google Patents
Injector arrangementInfo
- Publication number
- EP3867519A1 EP3867519A1 EP19786771.6A EP19786771A EP3867519A1 EP 3867519 A1 EP3867519 A1 EP 3867519A1 EP 19786771 A EP19786771 A EP 19786771A EP 3867519 A1 EP3867519 A1 EP 3867519A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protection sleeve
- heat protection
- combustion chamber
- sealing ring
- injection nozzle
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 92
- 238000002485 combustion reaction Methods 0.000 claims abstract description 69
- 238000002347 injection Methods 0.000 claims abstract description 49
- 239000007924 injection Substances 0.000 claims abstract description 49
- 239000000446 fuel Substances 0.000 claims abstract description 16
- 239000002737 fuel gas Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007921 spray 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
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/85—Mounting of fuel injection apparatus
- F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine
-
- 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
- the invention relates to an injector arrangement with an injection nozzle for
- Injecting medium into a combustion chamber in particular for injecting fuel into a combustion chamber of an internal combustion engine, and with a sealing ring that is biased for sealing against a sealing surface of a cylinder head, which comprises a through hole through which the injection nozzle enters the
- Combustion chamber protrudes and in which a heat protection sleeve is arranged in the radial direction between the injection nozzle and the cylinder head, which is connected non-positively to the injection nozzle by radial pressure at one end facing the combustion chamber.
- Fuel in the combustion chamber of an internal combustion engine comprising a
- Nozzle body the nozzle tip having the spray holes in the
- Injection nozzle in a receiving bore of a holding part in particular
- Cylinder head is used, the combustion chamber end region of the nozzle body with the interposition of the heat protection sleeve with the
- the heat protection sleeve has a first and a second region, which are axially spaced from each other, the second region being arranged closer to the nozzle tip than the first region, with a first outer on the outer jacket in the first region
- Inner jacket are formed a second inner circumferential sealing surface, the second sealing surfaces having a smaller diameter than the first sealing surfaces, the first outer and the second outer sealing surface each sealingly with an annular seat surface running in a radial plane or with a conical seat surface of the receiving bore Cooperate and the first inner and the second inner sealing surface each sealingly cooperate with an annular seat surface running in a radial plane or with a conical seat surface of the nozzle body.
- EP 3 014 105 Bl is a fuel injector, in particular a
- Receiving opening of a cylinder head of an internal combustion engine can be used and, in the installed position, has a first region facing a combustion chamber of the internal combustion engine, to which at least a second region of enlarged diameter is connected on the side facing away from the combustion chamber, the first region being made of metal and on which
- Combustion chamber-facing side is radially surrounded by a first sealing element, which in the annular space between the first region of the
- Bore section of the receiving bore can be used, and with a second sealing element, which on the side facing away from the combustion chamber between the injector housing and a contact surface of the receiving opening for the
- Injector housing is axially clampable, the first sealing element being axially between the injector housing and a second contact surface
- Receiving opening can be tensioned and is designed to seal the annular area between the injector housing and the receiving bore on the side of the first sealing element facing away from the first area, the two sealing elements on a component in the form of a metal
- the injector seal arrangement which is positioned between the fuel injector body and the engine cylinder head, wherein the injector seal arrangement is a sealing component formed from a first material, which in a longitudinal between the fuel injector body and the
- Engine cylinder head sealing surface is positioned to receive a fuel injector clamping force, and has a thermally conductive component, which is formed from a second material that is different from the first material, wherein the second material has a higher thermal conductivity than the first material and wherein the thermally conductive component is positioned radially between the nozzle element housing and the sealing component to transfer heat from the nozzle element housing to the sealing component.
- the object of the invention is to provide an injector arrangement with an injection nozzle, for injecting medium into a combustion chamber, in particular for injecting fuel into a combustion chamber of an internal combustion engine, and with a sealing ring which is biased for sealing against a sealing surface of a cylinder head and which has a through hole by which the
- Injection nozzle protrudes into the combustion chamber and in which a heat protection sleeve is arranged in the radial direction between the injection nozzle and the cylinder head, which sleeve is connected to the injection nozzle in a force-locking manner with an end facing the combustion chamber by radial pressure.
- the task is for an injector arrangement with an injection nozzle for
- Injecting medium into a combustion chamber in particular for injecting fuel into a combustion chamber of an internal combustion engine, and with a sealing ring which is prestressed for sealing against a sealing surface of a cylinder head, which comprises a through hole, through which the injection nozzle protrudes into the combustion chamber and in which a heat protection sleeve is arranged in the radial direction between the injection nozzle and the cylinder head, which is connected non-positively to the injection nozzle with an end facing the combustion chamber by radial pressure that the heat protection sleeve is non-positively connected to the sealing ring with an end facing away from the combustion chamber by an axial pressure.
- the injection nozzle is also referred to as an injector and comprises a nozzle body in which one
- Nozzle needle can be moved back and forth in the direction of a longitudinal axis of the injection nozzle in order to open or close injection openings or injection holes through which a medium under high pressure, such as fuel, can be injected into the combustion chamber.
- the terms axial and radial refer to the longitudinal axis of the injection nozzle.
- Axial means in the direction or parallel to the longitudinal axis of the injection nozzle.
- Radial means transverse to the longitudinal axis of the injection nozzle.
- the injector arrangement is advantageously used in the operation of modern internal combustion engines for injecting high-pressure fuel, in particular diesel fuel and / or gas, into the combustion chamber.
- high-pressure fuel in particular diesel fuel and / or gas
- a preferred embodiment of the injector arrangement is characterized in that the heat protection sleeve is prestressed in the axial direction together with the sealing ring against the sealing surface of the cylinder head. So can An axial pressure between the sealing ring and the cylinder head can be represented via the heat protection sleeve. This further improves the seal against undesired passage of fuel gas from the fuel gas.
- Another preferred exemplary embodiment of the injector arrangement is characterized in that the heat protection sleeve has at its end facing away from the combustion chamber a radially outwardly projecting collar, by means of which the heat protection sleeve is non-positively connected to the sealing ring.
- Radially outwards means that the collar of the heat protection sleeve is directed away from the longitudinal axis of the injection nozzle. In this way, an axial interference fit between the heat protection sleeve and the sealing ring is created in a simple manner.
- annular space which is formed in the radial direction between the heat protection sleeve and the cylinder head, is delimited in the axial direction at its end facing away from the combustion chamber by the radially outwardly projecting collar of the heat protection sleeve. This reliably prevents an undesired passage of fuel gas from the combustion chamber at the end of the annular space facing away from the combustion chamber.
- the annular space is structurally open.
- Another preferred exemplary embodiment of the injector arrangement is characterized in that the sealing ring has a radially inwardly projecting collar, which extends in the axial direction between the radially outwardly projecting collar of the heat protection sleeve and the sealing surface of the cylinder head
- Radially inwards means that the collar of the sealing ring is directed towards the longitudinal axis of the injection nozzle.
- the collar of the sealing ring preferably has an essentially rectangular ring cross section.
- the collar of the heat protection sleeve advantageously also has an essentially rectangular ring cross section. The two collars make it possible to display an axial press fit with the sealing ring and the heat protection sleeve in a simple manner.
- a further preferred exemplary embodiment of the injector arrangement is characterized in that a radial dimension of the inwardly projecting collar of the sealing ring is at least as large as the axial dimension of the radially outwardly projecting collar of the heat protection sleeve.
- the axial dimension of the radially inwardly projecting collar of the sealing ring is advantageously somewhat larger than the radially outwardly projecting collar of the heat protection sleeve.
- the axial dimension of the entire sealing ring is advantageously a little more than twice as large as the axial dimension of the heat protection sleeve.
- Another preferred exemplary embodiment of the injector arrangement is characterized in that there is a radial play between the radially outwardly projecting collar of the heat protection sleeve and the sealing ring. As a result, the representation of a radial press fit between the
- the heat protection sleeve and the injector simplified.
- the heat protection sleeve is particularly advantageously surrounded radially on the outside by an annular space. This annular space is delimited radially on the outside by the through hole in the cylinder head and by the sealing ring.
- a further preferred exemplary embodiment of the injector arrangement is characterized in that the heat protection sleeve comprises a sleeve body which has the shape of a straight hollow cylinder with an inner circumferential surface, with which the heat protection sleeve is pressed over its entire axial dimension against an outer circumferential surface of the injection nozzle.
- the entire inner lateral surface of the heat protection sleeve can be used for the heat transfer between the injection nozzle and the heat protection sleeve.
- Nozzle clamping nut are clamped.
- the radially outward collar of the heat protection sleeve is together with the radially inward collar of the sealing ring between the sealing surface of the cylinder head and the Nozzle clamp nut clamped.
- the nozzle clamping nut is used in a manner known per se to mount the injection nozzle in the cylinder head.
- the invention further relates to a heat protection sleeve and / or a sealing ring for a previously described injector arrangement.
- the heat protection sleeve and the sealing ring can be traded separately.
- the invention also relates to a kit for a preliminary
- the kit for the injector arrangement advantageously comprises different heat protection sleeves and sealing rings. In this way, the injector arrangement can be easily connected to different ones
- Installation specifications and / or operating specifications can be adjusted.
- FIG. 1 shows an injector arrangement with an injection nozzle and with a
- Heat protection sleeve which is connected to an end facing a combustion chamber by a radial pressure with the injection nozzle, wherein the heat protection sleeve is non-positively connected to an end facing away from the combustion chamber by an axial pressure with a sealing ring, im
- Figure 2 is a similar representation as in Figure 1 with an optimized
- FIG. 3 shows a representation similar to that in FIGS. 1 and 2 with a further optimized heat protection sleeve. Description of the embodiments
- FIG. 1 to 3 is an injector arrangement 1; 31; 41 in three similar versions each shown in longitudinal section.
- the same reference numerals are used to designate the same or similar parts.
- the injector arrangement 1; 31; 41 comprises an injection nozzle 2, which projects with a lower end in FIGS.
- the internal combustion engine comprises a cylinder head 4 with a through hole 5, through which the injection nozzle 2 projects into the combustion chamber 3.
- the cylinder head 4 has a sealing surface 6 facing away from the combustion chamber 3.
- the sealing surface 6 extends in a plane perpendicular to a longitudinal axis 8 of the injection nozzle 2.
- the injection nozzle 2 comprises a nozzle body 9, in which a (not visible or not shown) nozzle needle can be moved back and forth in the direction of the longitudinal axis 8 in order to (likewise through holes or not visible or not shown)
- the structure and the function of the injection nozzle 2 can be similar to that of the fuel injector disclosed in the European patent specification EP 3 014 105 B1 or the injection nozzle described in the Austrian patent specification AT 512 667 B1.
- a heat protection sleeve 10 is assigned to the nozzle body 9 of the injection nozzle 2 in a manner known per se.
- the heat protection sleeve 10 is formed from a good heat-conducting material, for example from a copper alloy. Heat is dissipated from the nozzle tip of the injection nozzle 2 via the heat protection sleeve 10.
- the heat protection sleeve 10 is non-positively connected to the nozzle body 9 of the injection nozzle 2 at one end 11 facing the combustion chamber 3 by radial pressure 12.
- the heat protection sleeve 10 is at one
- the nozzle clamping nut 15 serves, in a manner known per se, to mount the injection nozzle 2 in the cylinder head 4.
- the heat protection sleeve 10 has a collar 16 at its end 13 facing away from the combustion chamber 3.
- the collar 16 extends radially outward from a base body 17 of the heat protection sleeve 10.
- Heat protection sleeve 10 has essentially the shape of a straight
- the collar 16 has a rectangular ring cross section.
- the heat protection sleeve 10 has an end section 18 with a reduced diameter.
- the reduced diameter end section 18 serves to represent the radial pressure 12 between the heat protection sleeve 10 and the injection nozzle 2.
- the collar 16 of the heat protection sleeve 10 serves to represent the axial pressure between the heat protection sleeve 10 and the sealing ring 20th
- the annular space 19 is open towards the combustion chamber 3. At its end facing away from the combustion chamber 3, the annular space 19 is delimited by the collar 16 of the heat protection sleeve 10.
- the sealing ring 20 comprises a base body 21 with a rectangular
- a collar 22 extends radially inward from the base body 21 of the sealing ring 20.
- the collar 22 of the sealing ring 20 is clamped non-positively in the axial direction between the collar 16 of the heat protection sleeve 10 and the sealing surface 6 of the cylinder head 4. Due to the axial pressure 14, the heat protection sleeve 10 is non-positively connected to the sealing ring 20, which in turn is non-positively connected to the cylinder head 4.
- an axial press fit is created which reliably prevents fuel gas from the combustion chamber 3 from reaching the annular space 19 into an annular space 23 which is due to its construction.
- the annular space 23 is delimited axially at the bottom by the collar 22 of the sealing ring 20 in FIGS. 1 to 3.
- the annular space 23 is axially above
- Nozzle clamping nut 15 limited.
- the annular space 23 results from a structurally required radial play between the collar 16
- Heat protection sleeve 10 and the base body 21 of the sealing ring 20 are identical to Heat protection sleeve 10 and the base body 21 of the sealing ring 20.
- Heat protection sleeve 10 a sleeve body 32, which has the shape of a straight hollow cylinder.
- the sleeve body 32 lies over its entire axial
- the sleeve body 32 has an im
- the sleeve body 32 is designed without the end section 18 with reduced diameter. Otherwise, the heat protection sleeve 10 in FIG. 3 is designed in exactly the same way as in FIG. 2.
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 |
---|---|---|---|
DE102018217768.6A DE102018217768A1 (en) | 2018-10-17 | 2018-10-17 | Injector arrangement |
PCT/EP2019/077453 WO2020078817A1 (en) | 2018-10-17 | 2019-10-10 | Injector arrangement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3867519A1 true EP3867519A1 (en) | 2021-08-25 |
EP3867519B1 EP3867519B1 (en) | 2022-12-07 |
Family
ID=68233997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19786771.6A Active EP3867519B1 (en) | 2018-10-17 | 2019-10-10 | Injector assembly |
Country Status (6)
Country | Link |
---|---|
US (1) | US11536234B2 (en) |
EP (1) | EP3867519B1 (en) |
CN (1) | CN112912611B (en) |
DE (1) | DE102018217768A1 (en) |
FI (1) | FI3867519T3 (en) |
WO (1) | WO2020078817A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022001464B4 (en) * | 2022-04-26 | 2023-11-02 | Deutz Aktiengesellschaft | Cylinder head for an internal combustion engine |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2149817B2 (en) * | 1971-10-06 | 1975-08-21 | Daimler-Benz Ag, 7000 Stuttgart | Arrangement of a fuel injection valve for electronically controlled fuel injection into the intake duct of an internal combustion engine |
DE7827497U1 (en) * | 1978-09-15 | 1980-03-06 | Robert Bosch Gmbh, 7000 Stuttgart | HEAT PROTECTION FOR NOZZLES OF INTERNAL COMBUSTION ENGINES |
DE10027669A1 (en) | 2000-06-03 | 2001-12-06 | Bosch Gmbh Robert | Fixing device for fuel injection valve has at least one sealing element in region of step in bush |
US20070113828A1 (en) * | 2005-11-22 | 2007-05-24 | Fonville Carl E | Fuel injector isolating and sealing member |
DE102006049532A1 (en) * | 2006-10-20 | 2008-04-24 | Robert Bosch Gmbh | Screw connection for fuel injector |
WO2012014326A1 (en) * | 2010-07-30 | 2012-02-02 | トヨタ自動車 株式会社 | Vibration damping insulator for fuel injection valve |
AT512667B1 (en) | 2012-04-05 | 2014-03-15 | Bosch Gmbh Robert | Injection nozzle for injecting media into a combustion chamber |
DE102013212321A1 (en) | 2013-06-26 | 2014-12-31 | Robert Bosch Gmbh | fuel injector |
US10036355B2 (en) * | 2013-08-08 | 2018-07-31 | Cummins Inc. | Heat transferring fuel injector combustion seal with load bearing capability |
US9410520B2 (en) * | 2013-08-08 | 2016-08-09 | Cummins Inc. | Internal combustion engine including an injector combustion seal positioned between a fuel injector and an engine body |
DE102013021261A1 (en) | 2013-12-14 | 2015-06-18 | Daimler Ag | Fuel injection nozzle for an internal combustion engine |
AT517054B1 (en) * | 2015-04-14 | 2017-02-15 | Ge Jenbacher Gmbh & Co Og | Arrangement of a cylinder head and a fuel injector |
DE102015215943A1 (en) | 2015-08-20 | 2017-02-23 | Robert Bosch Gmbh | fuel injector |
GB201518531D0 (en) * | 2015-10-20 | 2015-12-02 | Delphi Internat Operations Luxembourg S À R L | Fuel injector nozzle shield |
DE102015223605A1 (en) * | 2015-11-27 | 2017-06-01 | Robert Bosch Gmbh | Injector arrangement with thermal protection sleeve |
-
2018
- 2018-10-17 DE DE102018217768.6A patent/DE102018217768A1/en not_active Withdrawn
-
2019
- 2019-10-10 US US17/284,537 patent/US11536234B2/en active Active
- 2019-10-10 CN CN201980068644.5A patent/CN112912611B/en active Active
- 2019-10-10 EP EP19786771.6A patent/EP3867519B1/en active Active
- 2019-10-10 FI FIEP19786771.6T patent/FI3867519T3/en active
- 2019-10-10 WO PCT/EP2019/077453 patent/WO2020078817A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
US20210381478A1 (en) | 2021-12-09 |
CN112912611A (en) | 2021-06-04 |
WO2020078817A1 (en) | 2020-04-23 |
DE102018217768A1 (en) | 2020-04-23 |
CN112912611B (en) | 2023-11-21 |
US11536234B2 (en) | 2022-12-27 |
EP3867519B1 (en) | 2022-12-07 |
FI3867519T3 (en) | 2023-03-18 |
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