EP2470771A1 - Fuel injection valve - Google Patents
Fuel injection valveInfo
- Publication number
- EP2470771A1 EP2470771A1 EP10734739A EP10734739A EP2470771A1 EP 2470771 A1 EP2470771 A1 EP 2470771A1 EP 10734739 A EP10734739 A EP 10734739A EP 10734739 A EP10734739 A EP 10734739A EP 2470771 A1 EP2470771 A1 EP 2470771A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seat
- nozzle
- region
- fuel injection
- injection valve
- 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
- F02M61/04—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
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
-
- 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
- F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
Definitions
- the invention relates to a fuel injection valve for injecting fuel into a combustion chamber of an internal combustion engine having the features of the preamble of claim 1.
- German Offenlegungsschrift DE 10 2006 012 242 A1 discloses a fuel injection valve for an internal combustion engine which has a valve body in which a pressure space which can be filled with fuel under high pressure is formed, from which at least one injection opening originates.
- a longitudinally displaceable valve needle is arranged, which cooperates with a sealing surface with a conical valve seat formed in the pressure chamber for opening and closing the at least one injection opening. So that enough fuel flows between the sealing surface of the valve needle and the valve seat through to the injection openings to a corresponding
- a conical valve seat is proposed with an opening angle between 75 ° and 100 °.
- the proposed Kraft- fuel injection valve on the advantage that a lesser stroke of the valve needle is required to overcome the seat throttling region, so that rapid successive injections are possible with a high injection pressure.
- the larger opening angle of the valve seat to reduce flow-related disturbing forces on the valve needle, which can have a desalination of the valve needle result.
- the object of the present invention is therefore to provide a fuel injector which has a high strength, in particular in the region of the valve seat.
- the proposed to solve the problem fuel injector has a nozzle needle, which is guided in a central bore of a nozzle body for releasing or closing at least one injection port hubbeweglich, wherein the nozzle needle formed on its combustion chamber end end, circumferential sealing area with a combustion chamber end of the Nozzle body trained conical seal seat cooperates.
- the conical sealing seat has an opening angle ⁇ i between 30 ° and 50 °, preferably between 40 ° and 50 °.
- the injection pressure can be increased by corresponding values.
- the nozzle per in the region of the injection openings have a smaller wall thickness, so that the injection openings have a shorter length, which in turn has a favorable effect on the coking sensitivity.
- a greater strength or robustness of the sealing seat region can also be achieved by carrying out other strength-increasing measures, such as, for example, a higher material quality, larger ones
- Wall thicknesses or stiffeners these measures are usually more expensive and usually not without influence on the function of the fuel injector.
- Ballistic injectors Since the proposed seat geometry requires a larger nozzle needle lift for seat deceleration, such is preferably realized in the case of ballistic fuel injection valves or injectors. In contrast to non-ballistic injectors, ballistic injectors have no stroke stop for limiting the nozzle needle stroke. Ballistic injectors thus enable a larger nozzle needle lift, which in turn causes the nozzle needle to move outside the seat throttling area for a long time, thus ensuring the complete injection pressure at the injection openings over a relatively long period of time.
- the at least one injection opening in the region of the sealing seat opens into the central bore of the nozzle body.
- the fuel injection valve preferably has a so-called seat hole nozzle.
- Seat hole nozzles have blind hole nozzles, in which the injection openings open below the sealing seat in a blind hole, among other things, the advantage that the harmful volume can be reduced by up to 50%. Due to the lower harmful emissions, the HC emissions are also significantly reduced. As well as the
- the proposed seat geometry of a fuel injection valve according to the invention in connection with the training as a seat hole nozzle proves to be particularly advantageous. Due to the injection openings formed in the seat portion, a seat hole nozzle has a lower strength compared to a blind hole nozzle, but this is compensated by the fact that stresses due to the proposed smaller opening angle of the sealing seat can be significantly reduced. Since, in the case of seat-hole nozzles, there is more often the danger of a depression of the nozzle needle than blind-hole nozzles, it is furthermore preferably proposed that the central bore has a seat-near guide region for guiding the nozzle needle.
- a guide region which is formed within a region of the central bore whose length is at most 40% of the total length of the nozzle body starting from the combustion chamber end of the nozzle body, is referred to as "seated close.”
- a seat-oriented guide can be used to counterbalance or skew the nozzle needle
- the central bore preferably has a region of reduced diameter for forming the seat-near guide region.
- the seat-near guide area is formed immediately adjacent to the sealing seat.
- an optimal guidance of the nozzle needle can be achieved on the other hand, the production of the guide area within the central bore is simplified. If, for example, the central bore for forming the guide region has a reduced diameter, closing only on one side of the guide region, that is to say on the side remote from the seat, rich in the central hole with a larger diameter, so that it can be easily prepared by exposure.
- the circumferential sealing area formed on the nozzle needle has at least one cone-shaped partial area.
- the cone angle ⁇ 2 of this partial area is preferably selected to be at least slightly larger than the opening angle ⁇ i of the sealing seat.
- the nozzle needle thus essentially abuts with a line-shaped sealing contour on the sealing seat.
- the circumferential sealing region can also be composed of two cone-shaped partial regions with different cone angles.
- the circumferential sealing area formed on the nozzle needle has a pressure stage with hydraulic active surfaces, which can be acted upon with fuel pressure in the axial and / or radial direction.
- a pressure stage may for example also have the shape of a circumferential groove.
- An adjoining, in the radial direction effective hydraulic pressure can also contribute to the leadership of the nozzle needle and thus prevent the risk of Ausachstechnik. Due to the properties mentioned above, an inventive
- nozzle design can significantly reduce HC emissions, ensure good spray symmetry, and achieve nozzle area strength that enables high injection pressures.
- the fuel injection valve according to the invention may be designed as a ballistic injector without a stroke stop, the use of which is widespread.
- FIGS. show: Fig. 1 are schematic partial sections in the region of the sealing seat, which contrast a 45 ° nozzle according to the invention of a known 60 ° nozzle and
- FIG. 2 shows schematic partial sections which contrast a seat hole nozzle of a blind hole nozzle.
- FIG. 1 The comparison of FIG. 1 is shown on the left side according to the invention and on the right side a known nozzle construction.
- Both nozzle designs comprise a nozzle needle 1, which is guided in a hub 2 in a central bore 2 of a nozzle body.
- the nozzle construction according to the invention has a seat-near guide region 7 with a reduced diameter.
- At least one injection port 4 is released or closed.
- Both nozzles are designed as seat hole nozzles, that is to say that the at least one injection opening 4 open into the central bore 2 in each case in the region of a sealing seat 6 formed inside the central bore 2.
- the sealing seat 6 in each case has a conical shape, which essentially corresponds to a conically extending partial region 8 of the nozzle needle 1 and forms a sealing region 5.
- the conical portion 8 of the nozzle needle 1 is followed by a cylindrical portion and thereafter again a conical portion, so that at the nozzle needle 1, a pressure stage 9 and between the nozzle needle 1 and sealing seat 6 an annular space is formed as a pressure chamber, which in the operation of the injection valve is filled under high pressure fuel.
- the pressure chamber is in communication with a formed between the nozzle needle 1 and the central bore 2 annular gap, which also serves as a pressure chamber.
- the central bore 2 runs out into a blind hole 10 in each case.
- Fig. 2 shows a Weglochdüse (left side) and a blind hole nozzle (right side) in a comparison.
- the at least one injection opening 4 opens in the region of the sealing seat 6 into the central bore 2 of the nozzle body, while in the blind-hole nozzle the at least one injection opening 4 enters into the blind hole 10 empties.
- a dead volume in the blind hole 10. As the illustrations of Fig. 2 it can be seen, this is significantly, that is reduced by about 50%.
- the HC emissions can therefore also be significantly reduced when using a seat hole nozzle, which presents itself as a further advantage.
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 |
---|---|---|---|
DE102009028960 | 2009-08-28 | ||
DE102009029542A DE102009029542A1 (en) | 2009-08-28 | 2009-09-17 | Fuel injection valve |
PCT/EP2010/060415 WO2011023467A1 (en) | 2009-08-28 | 2010-07-19 | Fuel injection valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2470771A1 true EP2470771A1 (en) | 2012-07-04 |
EP2470771B1 EP2470771B1 (en) | 2013-09-11 |
Family
ID=43524865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10734739.5A Not-in-force EP2470771B1 (en) | 2009-08-28 | 2010-07-19 | Fuel injection valve |
Country Status (6)
Country | Link |
---|---|
US (1) | US9441590B2 (en) |
EP (1) | EP2470771B1 (en) |
CN (1) | CN102625878B (en) |
DE (1) | DE102009029542A1 (en) |
RU (1) | RU2541367C2 (en) |
WO (1) | WO2011023467A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150020778A1 (en) * | 2012-03-14 | 2015-01-22 | International Engine Intellectual Property Company Llc | Fuel injector nozzle |
CN104088741A (en) * | 2014-06-23 | 2014-10-08 | 中国北方发动机研究所(天津) | Fuel accommodating chamber structure of fuel injector needle valve body |
FR3057623B1 (en) * | 2016-10-14 | 2020-12-25 | Delphi Int Operations Luxembourg Sarl | FUEL INJECTOR VALVE MEMBER |
DE102018113508A1 (en) * | 2018-06-06 | 2019-12-12 | Liebherr-Components Deggendorf Gmbh | Process for making a nozzle |
RU190852U1 (en) * | 2019-03-29 | 2019-07-15 | Евгений Викторович Горбачевский | Diesel Injector Sprayer |
RU190851U1 (en) * | 2019-03-29 | 2019-07-15 | Евгений Викторович Горбачевский | Electro-Hydraulic Spray Nozzle |
RU2698586C1 (en) * | 2019-05-13 | 2019-08-28 | Общество с ограниченной ответственностью Управляющая компания "Алтайский завод прецизионных изделий" | Sprayer of fuel injector |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2927737A (en) * | 1952-04-12 | 1960-03-08 | Bosch Gmbh Robert | Fuel injection valves |
US2822789A (en) * | 1956-06-15 | 1958-02-11 | Exxon Research Engineering Co | Injection of heavy fuel into diesel engines and valve means therefor |
US4987887A (en) * | 1990-03-28 | 1991-01-29 | Stanadyne Automotive Corp. | Fuel injector method and apparatus |
GB9012844D0 (en) | 1990-06-08 | 1990-08-01 | Lucas Ind Plc | Fuel injection nozzles |
GB9425652D0 (en) * | 1994-12-20 | 1995-02-22 | Lucas Ind Plc | Fuel injection nozzle |
CN1187233A (en) | 1995-06-09 | 1998-07-08 | 株式会社杰克赛尔 | Fuel injection nozzle having variable nozzle hole area |
DE19755057A1 (en) * | 1997-12-11 | 1999-06-17 | Bosch Gmbh Robert | Fuel injection nozzle for self-igniting internal combustion engines |
DE19844638A1 (en) * | 1998-09-29 | 2000-03-30 | Siemens Ag | Fuel injection valve for an internal combustion engine |
RU2175078C2 (en) * | 2000-01-31 | 2001-10-20 | Гундоров Валентин Михайлович | Spray tip internal combustion engine nozzle |
JP4103291B2 (en) | 2000-03-08 | 2008-06-18 | 株式会社デンソー | Fuel injection nozzle |
DE10031264A1 (en) | 2000-06-27 | 2002-01-17 | Bosch Gmbh Robert | Fuel injection valve for IC engines with even fuel supply to all injection openings even if valve member is misaligned |
DE10046304C1 (en) | 2000-09-19 | 2002-06-06 | Bosch Gmbh Robert | Method of manufacturing a valve seat body of a fuel injector |
DE10122503A1 (en) * | 2001-05-10 | 2002-11-21 | Bosch Gmbh Robert | Valve with radial recesses |
DE10323875A1 (en) | 2003-05-26 | 2004-12-23 | Siemens Ag | Mehrlocheinspritzdüse |
DE102004047183A1 (en) | 2004-09-29 | 2006-03-30 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engine, has valve pin with valve sealing surface, which cooperates with valve seat, where surface or seat is provided with coating that exhibits high friction value when mating with steel |
DE102006012242A1 (en) | 2006-03-15 | 2007-09-20 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE202006007883U1 (en) * | 2006-05-17 | 2006-10-19 | Robert Bosch Gmbh | Fuel injector for internal combustion engine, has two guides arranged at two sides that are turned towards and away of injection opening, respectively, where ratio of length in relation to diameter of each guide lies in specific range |
-
2009
- 2009-09-17 DE DE102009029542A patent/DE102009029542A1/en not_active Withdrawn
-
2010
- 2010-07-19 CN CN201080037997.8A patent/CN102625878B/en not_active Expired - Fee Related
- 2010-07-19 WO PCT/EP2010/060415 patent/WO2011023467A1/en active Application Filing
- 2010-07-19 EP EP10734739.5A patent/EP2470771B1/en not_active Not-in-force
- 2010-07-19 US US13/392,914 patent/US9441590B2/en not_active Expired - Fee Related
- 2010-07-19 RU RU2012111981/06A patent/RU2541367C2/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2011023467A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2012111981A (en) | 2013-10-20 |
RU2541367C2 (en) | 2015-02-10 |
US9441590B2 (en) | 2016-09-13 |
DE102009029542A1 (en) | 2011-03-03 |
US20120153053A1 (en) | 2012-06-21 |
EP2470771B1 (en) | 2013-09-11 |
WO2011023467A1 (en) | 2011-03-03 |
CN102625878A (en) | 2012-08-01 |
CN102625878B (en) | 2016-03-09 |
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