EP1523620A1 - Einspritzventil - Google Patents
EinspritzventilInfo
- Publication number
- EP1523620A1 EP1523620A1 EP03740112A EP03740112A EP1523620A1 EP 1523620 A1 EP1523620 A1 EP 1523620A1 EP 03740112 A EP03740112 A EP 03740112A EP 03740112 A EP03740112 A EP 03740112A EP 1523620 A1 EP1523620 A1 EP 1523620A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- injection valve
- injection
- stump
- combustion chamber
- 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
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
Definitions
- the invention relates to an injection valve, in particular its injector tip, which projects into a combustion chamber for direct injection into the latter.
- an injection valve in particular its injector tip, which projects into a combustion chamber for direct injection into the latter.
- deposits which are deposited in particular in the vicinity of the fuel outlet gap, influence the geometry of the emerging cone jet, in particular the shape of the jet cone angle and the jet's streakiness.
- jet-guided combustion processes are based on the exact reproducibility of the injection processes in narrow tolerance ranges over the entire service life of the engine, so that the formation of deposits must be avoided.
- the effect of this version is to avoid the accumulation and setting of combustion residues in the area of the nozzle outlet.
- a common flat surface is formed on the front face of the injection nozzle with the closure body in the closed state of the injection nozzle, so that the surface of the injection nozzle and the closure body facing the combustion chamber should remain free of combustion residues, in particular with a conical surface.
- the avoidance of precipitation of combustion residues on the surface of the injector tip cannot be optimized with a merely flat surface.
- the invention is based on the object of describing an injection valve at the tip of which deposits of combustion residues are avoided in the area of the fluid outlet.
- the invention is based on the finding that, in order to avoid the formation of combustion residues in the area of the dividing line between a valve plate and the valve seat of a valve housing, that is to say in the area of the fluid outlet or the formation of the fluid injection jet, there is a common smooth surface, which has no steps or edges is curved and at the same time.
- curvature means an outward curvature, which is equivalent to a workpiece radius that is smaller than infinity.
- the invention additionally uses the radius of curvature of the surface in the region of the dividing line as an optimization parameter.
- a curved surface which can have the shape of a spherical cap, for example, there are particular advantages with regard to the jet stability and the avoidance of precipitation of combustion residues at the injection valve or at the tip of the injector.
- the targeted adjustment of the radius of curvature has a lasting effect on the gas flow in the vicinity of the fuel outlet, which in turn has a positive effect on the jet stability when the injector is open during the injection cycle. Furthermore, the tendency of combustion residues to precipitate when the injector is closed during the combustion and exhaust cycle is avoided.
- an optimal design of an injector tip can thus be generated.
- a further advantageous embodiment of the invention consists in that the emerging cone beam intersects the tangent to the surface of the valve body and valve disk facing the combustion chamber vertically or almost vertically, preferably at an angle of approximately 90 ° + 20 °, in axial section.
- the figure shows an axial section through the axisymmetric injector tip facing the combustion chamber. It consists of a valve housing 1 with its side facing the combustion chamber surface 5. pressurized fuel is supplied through a space 9 within the injector that is reached by a training • 25 enters channel 3 in connection to the space 9 at the foremost end of the injector.
- the valve shown here consists of a valve seat on the valve housing 1 corresponding to the inner surface 7 of the valve housing 1 and the cooperating inner surface 8 of the valve plate 4 and
- valve needle 2 is formed or connected to the valve plate 4 at its lower end.
- tilteller 4 has the surface 6 facing the combustion chamber and the inner surface 8 facing the space 9.
- the injector When the injector is closed, they form the combustion chamber facing surfaces 5, 6 of valve body 1 and valve plate 4 a common smooth surface without steps and without edges.
- the surfaces 5, 6 together form a curved surface.
- a curved surface as shown in the figure, for example a spherical cap, additional optimization parameters with regard to the beam stability and the avoidance of precipitation of combustion residues are thus obtained at this point.
- the radius of curvature has a lasting positive influence on the gas flow in the vicinity of the fuel outlet and thus on the jet stability when the injector is open during the injection cycle. The same applies to the tendency to precipitation of combustion residues when the injector is closed during the combustion or exhaust cycle.
- valve body 1 and valve plate 4 are not limited to spherical caps, but all surface shapes that are simple to produce are possible, such as e.g. Paraboloids, ellipsoids, hyperboloids, if through these the radiation stability and the
- Coking tendency can be influenced favorably.
- a truncated design can be provided as the end closure at the valve tip.
- the inner surface 7 of the valve body 1 forms, together with the inner surface 8 of the valve plate 4, the outlet channel 3 for the fuel.
- the outlet channel 3 of the fuel must be designed in such a way that the cross-section through which it flows is constant or decreasing in the direction of flow, that is to say from the inside to the outside. Cavitation in the fuel is thus reliably avoided and the sealing surface or sealing line which is located on the outer edge of the outlet channel 3 becomes not damaged.
- the inner surfaces 7, 8 of valve body 1 and valve plate 4 meet in the direction of flow at a flat angle, ie either almost parallel or in a tangential form with the injector closed.
- the tangent direction in the figure the course of the surface 8, determines the cone beam angle ⁇ .
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 |
---|---|---|---|
DE10232693 | 2002-07-18 | ||
DE10232693A DE10232693A1 (de) | 2002-07-18 | 2002-07-18 | Einspritzventil |
PCT/DE2003/002185 WO2004016940A1 (de) | 2002-07-18 | 2003-07-01 | Einspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1523620A1 true EP1523620A1 (de) | 2005-04-20 |
EP1523620B1 EP1523620B1 (de) | 2008-01-09 |
Family
ID=30010178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03740112A Expired - Fee Related EP1523620B1 (de) | 2002-07-18 | 2003-07-01 | Einspritzventil |
Country Status (8)
Country | Link |
---|---|
US (1) | US7108201B2 (de) |
EP (1) | EP1523620B1 (de) |
JP (1) | JP4465272B2 (de) |
CN (1) | CN1668841A (de) |
AU (1) | AU2003285291A1 (de) |
DE (2) | DE10232693A1 (de) |
ES (1) | ES2295603T3 (de) |
WO (1) | WO2004016940A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10331266A1 (de) * | 2003-07-10 | 2005-03-24 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102006003668A1 (de) * | 2006-01-26 | 2007-08-02 | Bayerische Motoren Werke Ag | Brennstoffeinspritzventil mit nach aussen öffnender Düsennadel |
KR20120061640A (ko) * | 2010-12-03 | 2012-06-13 | 현대자동차주식회사 | 노킹 방지 장치 및 이를 제어하는 방법 |
US9416709B2 (en) * | 2012-06-15 | 2016-08-16 | Continental Automotive Systems, Inc. | Coking resistant after-treatment dosing value |
DE102019111122A1 (de) * | 2019-04-30 | 2020-11-05 | Voith Patent Gmbh | Injektordüse |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE475116C (de) * | 1925-01-21 | 1929-04-19 | Deckel Friedrich | Verfahren und Vorrichtung zum Einspritzen von Brennstoff in Verbrennungskraftmaschinen |
US4350301A (en) * | 1980-06-25 | 1982-09-21 | The Bendix Corporation | Flow controlled pressure regulating device |
GB2138884B (en) * | 1983-04-26 | 1987-02-18 | Maschf Augsburg Nuernberg Ag | I c engine fuel injection nozzle |
GB2219627B (en) * | 1988-06-10 | 1992-10-28 | Orbital Eng Pty | Improvements relating to nozzles for in-cylinder fuel injection systems |
US5685492A (en) * | 1990-01-26 | 1997-11-11 | Orbital Engine Company (Australia) Pty. Limited | Fuel injector nozzles |
DE19623713B4 (de) * | 1996-06-14 | 2008-06-19 | Robert Bosch Gmbh | Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors |
DE19739905A1 (de) * | 1997-09-11 | 1999-03-18 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
DE10012969B4 (de) * | 2000-03-16 | 2008-06-19 | Daimler Ag | Einspritzdüse und ein Verfahren zur Bildung eines Kraftstoff-Luftgemischs |
-
2002
- 2002-07-18 DE DE10232693A patent/DE10232693A1/de not_active Ceased
-
2003
- 2003-07-01 ES ES03740112T patent/ES2295603T3/es not_active Expired - Lifetime
- 2003-07-01 EP EP03740112A patent/EP1523620B1/de not_active Expired - Fee Related
- 2003-07-01 AU AU2003285291A patent/AU2003285291A1/en not_active Abandoned
- 2003-07-01 JP JP2004528335A patent/JP4465272B2/ja not_active Expired - Fee Related
- 2003-07-01 CN CN03817128.7A patent/CN1668841A/zh active Pending
- 2003-07-01 WO PCT/DE2003/002185 patent/WO2004016940A1/de active IP Right Grant
- 2003-07-01 DE DE50308979T patent/DE50308979D1/de not_active Expired - Lifetime
-
2004
- 2004-12-13 US US11/010,587 patent/US7108201B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004016940A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4465272B2 (ja) | 2010-05-19 |
US20050092854A1 (en) | 2005-05-05 |
DE50308979D1 (de) | 2008-02-21 |
AU2003285291A1 (en) | 2004-03-03 |
CN1668841A (zh) | 2005-09-14 |
EP1523620B1 (de) | 2008-01-09 |
ES2295603T3 (es) | 2008-04-16 |
WO2004016940A1 (de) | 2004-02-26 |
DE10232693A1 (de) | 2004-02-05 |
JP2005533224A (ja) | 2005-11-04 |
US7108201B2 (en) | 2006-09-19 |
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