EP1565650A1 - Einspritzvorrichtung zum einspritzen von kraftstoff - Google Patents
Einspritzvorrichtung zum einspritzen von kraftstoffInfo
- Publication number
- EP1565650A1 EP1565650A1 EP03767413A EP03767413A EP1565650A1 EP 1565650 A1 EP1565650 A1 EP 1565650A1 EP 03767413 A EP03767413 A EP 03767413A EP 03767413 A EP03767413 A EP 03767413A EP 1565650 A1 EP1565650 A1 EP 1565650A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray hole
- injection device
- injection
- spray
- area
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims description 52
- 238000007789 sealing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 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
- F02M61/16—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
- 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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
Definitions
- the present invention relates to an injection device for injecting fuel, in particular for injecting fuel into a combustion chamber of an internal combustion engine.
- Injectors for injecting fuel into a combustion chamber of an internal combustion engine are known in a wide variety of configurations from the prior art.
- Injection devices of this type comprise a nozzle needle guided in a nozzle body, a sealing seat being formed at a tip of the nozzle needle for a T-seal between the nozzle needle and the nozzle body.
- a plurality of spray holes are usually formed below the sealing seat and branch off from a blind hole in the nozzle body. The fuel is injected into the combustion chamber through these spray holes.
- the end of the nozzle is usually in the form of a cone or truncated cone, and the spray holes run from the outside of the cone inwards to the blind hole. Due to the arrangement of the spray holes in the cone area, there is a non-planar exit surface on the outside of the cone, as shown in FIG. 4. As a result, when the fuel jet is viewed in a plane perpendicular to the central axis XX of the spray hole, some of the fuel particles emerge from the spray hole while they are still being guided at the spray hole wall in other areas of the spray hole. This results in a different deflection of the beam over the exit area and a different fanning out of the beam at the exit area. Furthermore, the different guide lengths of the fuel particles at the outlet area lead to non-symmetrical injection geometries and also to a geometry of the outlet jet that is not or only with difficulty reproducible.
- FIG. 5 also shows a known nozzle inclined to a combustion chamber, in which there are different guide lengths of individual spray holes due to the inclination.
- the guide length at the left spray hole 4 is larger by A than at the right spray hole 4 ', where the guide is B. This also causes scattering of the spray pattern from spray hole to spray hole.
- the injection device for injecting fuel, it has an outlet area which lies in a plane perpendicular to an injection hole axis.
- all edge points at the exit area of the spray hole lie in a plane perpendicular to the spray hole axis, so that a planar exit surface is present.
- An exact beam geometry can thus be obtained by the measure according to the invention.
- the arrangement of the outlet area according to the invention in a vertical plane for an exact and faster alignment of the beam.
- the design of the exit area according to the invention further improves the atomization within the jet and significantly reduces the pressure dependence of the jet geometry. Another advantage lies in the fact that tests on engine test benches or the like can be significantly simplified.
- the exit geometry according to the invention thus provides an optimal exit jet cone, which leads to an improved combustion process and to improved exhaust gas emission.
- the outlet region of the spray hole is in a region which is in particular recessed by means of depressions.
- a depression at the exit area of the spray hole is carried out such that after the depression all edge points of the exit-side spray hole end lie in a plane perpendicular to the spray hole axis.
- the outlet region of the spray hole is arranged on a flat-ground outer region of the housing component.
- the exit area according to the invention can also be provided in a particularly simple manner. It is possible to form the flat area on the outside of the housing component either before the spray hole is made or after the spray hole is made.
- the outer design of the housing component is preferably designed as a polyhedron.
- a polyhedron can be produced with an essentially conical basic shape.
- the housing component in which the spray hole is arranged is furthermore preferably an essentially conical or spherical component.
- the injection device according to the invention is preferably installed at an angle to a combustion chamber axis.
- the greatest problems have hitherto been encountered in the prior art, since it is only from this that different length differences and thus different jet geometry of the individual spray holes occur from spray hole to spray hole. According to the invention, however, this problem can now be easily solved and the same spray geometry can be ensured at each spray hole.
- the injection device according to the invention is used in particular in storage injection systems, such as common rail systems, for the injection of fuel under high pressure.
- the present invention achieves particularly good injection results with corresponding advantages with regard to combustion and the exhaust gas behavior, since, due to the high pressure, a large amount of fuel is injected within a short period of time with a predetermined, easily reproducible jet geometry.
- FIG. 1 shows a schematic partial sectional view of an injection device according to a first exemplary embodiment of the present invention
- FIG. 2 shows an enlargement of the exit area of the spray hole marked X in FIG. 1
- FIG. 3 shows a schematic sectional view of an exit region according to a second exemplary embodiment of the present invention
- Figure 4 shows an exit area according to the prior art
- Figure 5 is a schematic sectional view of a nozzle inclined to the combustion chamber according to the prior art.
- An injection device 1 for a memory injection system according to a first exemplary embodiment of the present invention is described below with reference to FIGS. 1 and 2.
- the injection device 1 comprises a housing 2 in the form of a nozzle body, in which a blind hole 3 with a seat cone 10 is formed.
- a sealing seat 8 on the seat cone 10 is closed or released in a known manner by a nozzle needle, not shown.
- a fuel under pressure flows in a known manner through the blind hole 3 and via the spray holes 4 into a combustion chamber of an internal combustion engine.
- FIG. 2 shows the exit area 5 of the spray hole 4 of the first exemplary embodiment in detail.
- a depression 6 is formed at the exit area 5 of the spray hole 4 such that the exit area 5 of the spray hole lies in a plane E.
- all edge points 9 of the outlet-side spray hole end lie in a plane E which is perpendicular to a spray hole axis YY.
- This configuration of the spray-hole end on the outlet side achieves an exact and rapid alignment of the spray jet with a predictable and reproducible jet geometry.
- one can uniform jet symmetry of the fuel injected into the combustion chamber can be obtained.
- the jet becomes more independent of pressure fluctuations.
- an improved combustion process can also be obtained.
- FIG. 3 An injection device according to a second exemplary embodiment of the present invention is described below with reference to FIG. 3. The same parts are designated with the same reference numerals.
- the injection device 1 according to the second exemplary embodiment essentially corresponds to that of the first exemplary embodiment, with a flat-ground region 7 being formed instead of the countersink in the second exemplary embodiment.
- the flat ground area 7 forms the plane E, which is arranged perpendicular to the spray hole axis Y-Y, so that the exit area 5 of the spray hole 4 lies in this plane E.
- the flat ground area 7 can be created before or after the spray hole 4 is produced.
- the injection device 1 according to the invention is used in particular in storage injection systems, such as, for example, common rail systems for injecting diesel fuel under high pressure into a combustion chamber.
- storage injection systems such as, for example, common rail systems for injecting diesel fuel under high pressure into a combustion chamber.
- the design according to the invention of the exit-side end of the spray hole shows significant advantages over the conventional spray hole geometries previously used, in particular at high pressures and in the event of pressure fluctuations.
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 (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2002155375 DE10255375A1 (de) | 2002-11-27 | 2002-11-27 | Einspritzvorrichtung zum Einspritzen von Kraftstoff |
| DE10255375 | 2002-11-27 | ||
| PCT/DE2003/003717 WO2004048772A1 (de) | 2002-11-27 | 2003-11-10 | Einspritzvorrichtung zum einspritzen von kraftstoff |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1565650A1 true EP1565650A1 (de) | 2005-08-24 |
| EP1565650B1 EP1565650B1 (de) | 2006-09-06 |
Family
ID=32335797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03767413A Expired - Lifetime EP1565650B1 (de) | 2002-11-27 | 2003-11-10 | Einspritzvorrichtung zum einspritzen von kraftstoff |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1565650B1 (de) |
| DE (2) | DE10255375A1 (de) |
| WO (1) | WO2004048772A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008025552A (ja) * | 2006-07-25 | 2008-02-07 | Yanmar Co Ltd | インジェクタの噴孔穿設方法 |
| DE102013010552A1 (de) | 2013-06-15 | 2014-12-18 | Volkswagen Aktiengesellschaft | Einspritzvorrichtung |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE932209C (de) * | 1952-04-13 | 1955-08-25 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
| GB1088666A (en) * | 1964-03-09 | 1967-10-25 | Lister & Co Ltd R A | Improvements in or relating to fuel injectors for internal combustion engines |
| DE68905502T2 (de) * | 1988-02-05 | 1993-09-23 | Lucas Ind Plc | Brennstoffeinspritzventil. |
| FR2773852B1 (fr) * | 1998-01-20 | 2000-03-24 | Sagem | Injecteur de carburant pour moteur a combustion interne a allumage commande |
| US6422487B1 (en) * | 2000-03-30 | 2002-07-23 | Siemens Automotive Corporation | Deposit resistant material for a fuel injection seat and method of manufacturing |
| DE10046306A1 (de) * | 2000-09-19 | 2002-04-04 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
| JP3839245B2 (ja) * | 2000-11-13 | 2006-11-01 | 三菱電機株式会社 | 燃料噴射弁 |
-
2002
- 2002-11-27 DE DE2002155375 patent/DE10255375A1/de not_active Ceased
-
2003
- 2003-11-10 EP EP03767413A patent/EP1565650B1/de not_active Expired - Lifetime
- 2003-11-10 DE DE50304986T patent/DE50304986D1/de not_active Expired - Lifetime
- 2003-11-10 WO PCT/DE2003/003717 patent/WO2004048772A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004048772A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004048772A1 (de) | 2004-06-10 |
| EP1565650B1 (de) | 2006-09-06 |
| DE50304986D1 (de) | 2006-10-19 |
| DE10255375A1 (de) | 2004-06-24 |
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