EP2480783A1 - Fuel injection valve for an internal combustion engine - Google Patents
Fuel injection valve for an internal combustion engineInfo
- Publication number
- EP2480783A1 EP2480783A1 EP10754337A EP10754337A EP2480783A1 EP 2480783 A1 EP2480783 A1 EP 2480783A1 EP 10754337 A EP10754337 A EP 10754337A EP 10754337 A EP10754337 A EP 10754337A EP 2480783 A1 EP2480783 A1 EP 2480783A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- needle
- hole
- valve seat
- blind hole
- 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 58
- 238000002347 injection Methods 0.000 title claims abstract description 58
- 239000007924 injection Substances 0.000 title claims abstract description 58
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 26
- 239000007921 spray Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 238000003860 storage 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
- F02M61/1866—Valve seats or member ends having multiple cones
-
- 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
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
-
- 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
-
- 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
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
-
- 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
- F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
Definitions
- Fuel injection valve for an internal combustion engine The invention relates to a fuel injection valve for ei ⁇ ne internal combustion engine.
- a fuel injection valve for ei ⁇ ne internal combustion engine.
- Such a fuel injection valve is used for temporally and quantitatively targeted, direct injection of fuel, gasoline or diesel, in the combustion chamber of a cylinder of an internal combustion engine during operation.
- Such injectors are manufactured in large volumes for Verbrennungsmo ⁇ motors particularly for the automotive industry and used.
- Spray holes as well as an actuator with actuator arrangement and transmission mechanism or control hydraulic with control valve for actuating the nozzle needle.
- actuator here come electromagnetic actuators or piezo actuators in question.
- the nozzle needle At rest, the nozzle needle is through presses the closing spring into the valve seat and seals the fuel-filled, high-pressure nozzle ring space with respect to the spray holes.
- For injecting fuel into the combustion chamber of the internal combustion engine is raised by driving the actuator and with ⁇ means of the transmission mechanism or hydraulic control the nozzle needle from the valve seat and so the Spritzlö ⁇ cher released.
- the high-pressure fuel is injected through the spray holes directly into the associated combustion chamber.
- Such a fuel injection valve is known for example from DE 33 03 470 AI.
- DE 33 03 470 AI discloses an injection nozzle for internal combustion engines with a pressure chamber in a valve body and a nozzle needle.
- the nozzle needle has a sealing cone on which rests in a conical seat of the valve body and the injection ports seals against the pressure chamber.
- the conical seat of the valve body merges into a blind hole-shaped recess called a well, from which the injection holes originate.
- the accuracy of the injection quantities depends very much on the available pressure and its constancy in the nozzle ring space as well as the precision of the control as well as tolerances of the mechanics and in particular of the injection holes. It is a known effect that amplifies deposits formed with increasing Leis ⁇ tung dense and increasing exhaust gas recirculation rate by coking in the injection holes which negatively affects the required accuracy of the injection and thus performance and emission behavior.
- the present invention is therefore an object of the invention to provide a fuel injection valve, which ensures a permanently improved and consistent performance and emissions ⁇ behavior of the internal combustion engine.
- Internal combustion engine consists of an injector body having ei ⁇ nen nozzle shaft and a receiving bore for a nozzle needle, wherein the receiving bore is formed as a blind hole.
- the receiving bore forms a needle guide in the upper region and a nozzle annulus in the region of the nozzle stem and forms a cone-shaped valve seat at its base and a blind-hole-shaped recess in the region of the conical tip of the valve seat, also referred to below as nozzle blind hole. From this recess at least one spray hole goes out, the Nozzle annulus below the valve seat with the predominantlybe ⁇ rich, ie the respective combustion chamber of the internal combustion engine, connects.
- the longitudinally movable in therawboh- tion arranged nozzle needle has an at least partially cone-shaped needle tip, and is located in the ge ⁇ closed state of the fuel injection valve with the needle tip in the valve seat so that the nozzle blind hole and thus the at least one injection hole with respect to the Nozzle ring space seals.
- the needle tip of the nozzle needle is characterized in that it comprises a nozzle blind hole in contour and extent Toggle matched, even pintle mentioned hereinafter, shaping, which protrudes into the nozzle blind hole and so a Zvi ⁇ 's valve seat and the spray hole formed noxious volume is reduced.
- the advantages of the subject invention are on the one hand ⁇ in that the reduced emissions and the HC emissions can be reduced.
- the flow cross-section in front of the at least one spray hole is reduced so that it increasingly leads to a cavitating force ⁇ flow in the spray holes, which counteracts the deposits in the spray holes. In this way, a consistently high level of performance of the internal combustion engine is achieved.
- the nozzle blind hole is at least partially conical and has a smaller cone angle than the valve seat itself.
- This allows a simplified Ferti ⁇ supply and dimensional adjustment of the inner contour of the Düsensack- hole and the outer contour of the needle pin of the needle tip of the nozzle needle.
- this configuration allows that between the inner contour of the nozzle blind hole and the outer contour of the needle pin through the annular gap formed ⁇ flow cross-section increases with increasing needle stroke of Dü ⁇ sennadel and thus provides an additional way of influencing the fuel metering by varying the flow rate.
- a further advantageous embodiment of the invention Jacobs ⁇ tandes is characterized in that the Queritessflä ⁇ surface of the intermediate nozzle blind hole of the valve seat and Nadelzap- the needle tip ring gap formed fen by at least sensacklochwand or a partial recess in the needle journal wall in the due-both places locally expanded is. This causes an additional turbulence of the fuel flow ⁇ in the annular gap between the needle pin and the nozzle blind hole and enhances the self-cleaning effect of
- the partial recesses in the nozzle sack hole wall and the pin journal wall are designed in a special design as an annular groove over the circumference. This is an advantage, especially in terms of ease of manufacture.
- the partial recesses in the nozzle sack hole wall and the pin wall can be used as punctual, crater-shaped walls. ge, dellenförmige or spherical section depressions be executed. Other possibilities of shaping the depressions, which are possibly directly related to the respective production process, are also included here.
- the cross-sectional area of the between the in ⁇ inner contour of the nozzle blind hole of the valve seat and the exterior formed contour of the needle pin of the needle tip Ringspal ⁇ tes, in the open state of the fuel injection valve is smaller than the outlet cross sectional area of the at least one spray hole or where appropriate the sum of ⁇ from occurs cross-sectional areas of all the injection holes extending from the due-sensackloch the valve seat.
- FIG. 1 is a sectional view of the nozzle shaft portion of a fuel injection valve according to the invention
- FIG. 2 is an enlarged view of the ⁇ be recorded in Figure 1 with X region of the valve seat and the needle tip of the nozzle needle ⁇ in section
- 3 shows a further sectional view of the region designated by X in FIG. 1 with a conical configuration of the needle journal,
- FIG. 4 shows a further sectional illustration of the region designated by X in FIG. 1 with a conical configuration of the needle journal and additional annular grooves on the needle journal circumference and on the circumference of the nozzle blind hole and
- Fig. 5 is a further sectional view of the designated in Figure 1 with X area with a conical configuration of the needle pin and additional punctual Vertie ⁇ tions on the Nadelzapfenhold and the nozzle bag Iochrely.
- FIG. 1 shows the nozzle shaft region of a fuel injection valve. Shown are the injector body 1 and the nozzle needle 6. The other components of a fuel injection valve, such as the actuator with actuator assembly and transmission mechanism or control hydraulic control valve for actuating the nozzle needle are not shown here, as they unerheb ⁇ Lich for the invention are.
- the injector body 1 has a blind hole-shaped receiving bore 3 for the nozzle needle 6. At the lower end, ie at the bottom of the blind-hole-shaped receiving bore 3 of the injector body 1, a conical valve seat 4 is formed.
- the nozzle needle 6 has a multi-stepped diameter. In the upper region, the outer diameter of the nozzle needle corresponds approximately to the inner diameter of the receiving bore 3 of the injector body 1 such that a sliding guidance of the nozzle needle 6 in the receiving bore 3 is ensured. 0
- the nozzle needle In the lower Be ⁇ rich 6, the nozzle needle to a relation to the inner diameter of the receiving bore 3 reduced outer diameter, so that a nozzle annulus 3a is formed in the region of the nozzle shaft 2 between the nozzle needle 6 and the injector body. 1
- the nozzle annulus 3a has in its upper region an annular grooved extension and is connected via a fuel inlet bore ⁇ 3b with an unillustrated high-pressure fuel reservoir of the fuel injection system. About the fuel inlet bore 3b of the nozzle annulus 3a is filled with fuel and acted upon by the operating pressure of the high-pressure fuel storage.
- the nozzle needle 6, At its lower end, the nozzle needle 6, a further Ab ⁇ gradation and a conical needle tip 7 on.
- This marked in Figure 1 with X area of the needle tip 7 and the valve seat 4 is shown enlarged in Figure 2 as a section. It can be seen that here the cone angle of the needle tip 7 is slightly larger than the cone angle of the valve seat 4. This results in a linear contact between needle tip 7 and valve seat 4 and thus an increased surface pressure and tight sealing of the nozzle annulus 3a in this area.
- the conical valve seat 4 in the nozzle shaft 2 of the injector ⁇ body 1 is widened in its tip with a blind hole-shaped recess, which is also referred to here as the nozzle blind hole 8.
- a blind hole-shaped recess which is also referred to here as the nozzle blind hole 8.
- This nozzle blind hole 8 around the nozzle Schaff 2 is formed dome-shaped. This formation is referred to hereinafter as nozzle tip 2a.
- the injection holes 5 In the region of the nozzle tip 2a are through the wall of the nozzle tip 2a extending bores, the injection holes 5, the connection between the nozzle blind hole 8 and the outer space of _
- Nozzle shaft 2 so in the installed state produce a combustion chamber of the internal combustion engine. If the valve is opened, that is to say the nozzle needle 6 is lifted off the valve seat 4, the high pressure applied in the nozzle annulus causes fuel to be injected through the injection holes 5 into a combustion chamber of the internal combustion engine.
- the nozzle needle 6 has at its needle point 7 a spigot-shaped formation, which is referred to hereinafter as a needle pin 9.
- the needle pin 9 is formed in its outer contour and its extent so that it protrudes in closed ⁇ nem state of the fuel injection valve in the nozzle bag hole ⁇ 8 on the inside of the nozzle tip 2a. In this way, the harmful volume between the needle tip 7 and nozzle blind hole 8 is significantly reduced.
- the dimensional coordination between the needle pin 9 and nozzle blind hole 8 is chosen so that a sufficiently large annular gap between the needle pin 9 and nozzle blind hole 8 is ensured for the required fuel flow during fuel injection, ie in the open state of the fuel injection valve.
- the cross-sectional area of the annular gap is so dimensioned that it, in the opened state of the motor ⁇ material injection valve is smaller than the sum of the off ⁇ takes cross-sectional areas of all the injection holes 5 extending from the nozzle blind hole 8 of the valve seat. 4 This causes, that forms a kavitierende fuel flow, which is adapted to prevent deposits in the annular gap and the injection ⁇ holes or even remove already existing deposits.
- FIG. 2 shows a pairing of needle spigot 9 and nozzle sack hole 8 with a substantially cylindrical contour and crown-shaped end. This causes the cross-sectional area of the annular gap does not change and small Publ ⁇ voltage strokes of the nozzle needle 6 is always the same Strö ⁇ flow conditions in the nozzle 8 and the blind hole injection openings 5 are present. Only at much larger nozzle needle strokes, as soon as the needle pin 9 is almost completely withdrawn from the nozzle blind hole 8, the flow area cross-sectional area increases in front of the spray holes 5 and the flow rate and so ⁇ increase with the injection quantity.
- FIG. 3 shows an alternative embodiment of needle pin 9 and nozzle blind hole 8.
- FIG. 3 shows first, coming from the valve seat 4, in the direction of the needle pin end, a frustoconical or conical contour of the nozzle blind hole 8 and the needle pin 9.
- the truncated cone is then adjoined by a cone in which the needle pin or the nozzle blind hole ends , Needle pin 9 and nozzle blind hole 8 are again dimensionally coordinated so that between them, even in the illustrated closed state of the fuel injection valve remains an annular gap.
- the annular gap increases with increasing needle stroke when opening the valve.
- FIG. 4 like FIG. 3, shows a needle pin 9 and a nozzle blind hole 8 with a truncated cone contour.
- two pin-pin grooves 11 and 12 were added to the truncated cone contour of the needle pin on the circumference.
- needle pin-ring groove 12 is located on the truncated cone of the needle pin 9 approximately at a height that it is located at ge ⁇ enfinem fuel injection valve directly opposite the inlet opening of the two drawn spray holes.
- the second, upper needle pin-ring groove 11 be ⁇ is found at a small distance above the first needle pin-ring groove 12. Due to the annular grooves of the fuel ⁇ stream is additionally swirled in the annular gap between the needle pin 9 and nozzle blind hole 8, whereby the inclination of the fuel ⁇ To cavit current and thus the cleaning effect in the annular gap and the spray holes 5 is increased.
- a needle pin 9 is shown with two annular grooves 11, 12, but it is also possible embodiments with only one annular groove or with more than two annular grooves.
- a nozzle blind hole annular groove 15 is arranged on the circumference of the nozzle blind hole wall, which extends between the spray holes 5 and the valve seat 4 over the circumference of the nozzle blind hole 8.
- FIG. 5 like FIG. 3, shows a needle pin 9 and a nozzle blind hole 8 with a truncated cone contour.
- several huiuel ⁇ le recesses 14, 15 were disposed on both the truncated cone contour of the needle pin as well as on the inner wall of the nozzle blind hole on the circumference.
- the Nadelzapfen-Vertief ⁇ ments 14 are exemplified here as a spherical segment-shaped recesses, the nozzle blind hole recesses 15 are shown as crater-shaped depressions.
- These two Embodiments of the recesses are shown here 5 representatively for further possible forms of the recesses, which may possibly result from different manufacturing processes.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009042155A DE102009042155A1 (en) | 2009-09-21 | 2009-09-21 | Fuel injection valve for an internal combustion engine |
PCT/EP2010/063640 WO2011033036A1 (en) | 2009-09-21 | 2010-09-16 | Fuel injection valve for an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2480783A1 true EP2480783A1 (en) | 2012-08-01 |
EP2480783B1 EP2480783B1 (en) | 2015-06-24 |
Family
ID=42936917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10754337.3A Active EP2480783B1 (en) | 2009-09-21 | 2010-09-16 | Fuel injection valve for an internal combustion engine |
Country Status (4)
Country | Link |
---|---|
US (1) | US9297344B2 (en) |
EP (1) | EP2480783B1 (en) |
DE (1) | DE102009042155A1 (en) |
WO (1) | WO2011033036A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011007894A1 (en) * | 2011-04-21 | 2012-10-25 | Continental Automotive Gmbh | Nozzle assembly for injection valve, has nozzle body with central axis, in which nozzle body recess and two injection openings are arranged, where nozzle body recess is hydraulically coupled with high-pressure cycle of fluid |
DE102011007887A1 (en) * | 2011-04-21 | 2012-10-25 | Continental Automotive Gmbh | Nozzle assembly for an injection valve and injection valve |
WO2012085901A2 (en) * | 2011-05-09 | 2012-06-28 | Lietuvietis Vilis I | Valve covered orifice pressure equalizing channel |
DE102011077272A1 (en) * | 2011-06-09 | 2012-12-13 | Robert Bosch Gmbh | Injection valve for internal combustion engines |
US9903329B2 (en) * | 2012-04-16 | 2018-02-27 | Cummins Intellectual Property, Inc. | Fuel injector |
DE102013217371A1 (en) * | 2013-08-30 | 2015-03-05 | Robert Bosch Gmbh | fuel injector |
WO2016018375A1 (en) * | 2014-07-31 | 2016-02-04 | Cummins Inc. | Method for reducing carbon/coke in fuel injectors in dual fuel applications |
DE102014218056A1 (en) * | 2014-09-10 | 2016-03-10 | Robert Bosch Gmbh | Fuel injector |
DE102014220104B3 (en) * | 2014-10-02 | 2016-01-28 | Continental Automotive Gmbh | Fuel injection valve |
JP6354519B2 (en) * | 2014-10-23 | 2018-07-11 | 株式会社デンソー | Fuel injection valve |
US10865754B2 (en) * | 2017-04-05 | 2020-12-15 | Progress Rail Services Corporation | Fuel injector having needle tip and nozzle body surfaces structured for reduced sac volume and fracture resistance |
DE102018106822A1 (en) | 2018-03-22 | 2019-09-26 | Volkswagen Ag | Regeneration method for reducing the degree of coking of an annular gap surrounding an injector |
DE102019103512A1 (en) * | 2019-02-12 | 2020-08-13 | Liebherr-Components Deggendorf Gmbh | Nozzle for a fuel injector |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3303470A1 (en) | 1983-02-02 | 1984-08-02 | Jaroslavskij savod diselnoj apparatury, Jaroslavl | Injection nozzle for combustion engines |
GB2198785A (en) * | 1986-12-01 | 1988-06-22 | Ford Motor Co | I.C. engine fuel injector |
DE19820513A1 (en) * | 1998-05-08 | 1999-11-11 | Mtu Friedrichshafen Gmbh | Fuel injection nozzle for internal combustion engine |
DE10000574A1 (en) * | 2000-01-10 | 2001-07-19 | Bosch Gmbh Robert | Fuel injector |
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 |
DE10115216A1 (en) * | 2001-03-28 | 2002-10-10 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
DE10122503A1 (en) * | 2001-05-10 | 2002-11-21 | Bosch Gmbh Robert | Valve with radial recesses |
DE10149277A1 (en) * | 2001-10-05 | 2003-04-24 | Siemens Ag | Fuel injection valve, for an IC motor, has grooves at the conical tip of the valve needle matching the injection openings in the valve body |
US6918549B2 (en) * | 2001-12-21 | 2005-07-19 | Caterpillar Inc | Fuel injector tip for control of fuel delivery |
DE10163909A1 (en) | 2001-12-22 | 2003-07-03 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engine has throttling pin formed on combustion chamber side point of valve needle and with contact of valve needle on valve seat protrudes into blind hole connected downstream to valve seat |
DE10245573A1 (en) | 2002-09-27 | 2004-04-08 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
US7331537B2 (en) * | 2002-11-11 | 2008-02-19 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE10306700A1 (en) | 2003-02-18 | 2004-08-26 | Robert Bosch Gmbh | Fuel injection valve for IC engine has a cylindrical section of the dosing needle and the injector bore to maintain an even aperture over part of the needle displacement |
DE10354878A1 (en) * | 2003-11-24 | 2005-06-09 | Robert Bosch Gmbh | Fuel injection device, in particular for an internal combustion engine with direct fuel injection, and method for their preparation |
US7578450B2 (en) * | 2005-08-25 | 2009-08-25 | Caterpillar Inc. | Fuel injector with grooved check member |
DE102006033687A1 (en) | 2006-07-20 | 2008-01-24 | Siemens Ag | Injector nozzle e.g. for fuel injection, has nozzle needle, and conical-trained sealing area with body jet, circuit and nozzle needle provided which axially moves bag shaped capsules |
US8011600B2 (en) * | 2006-12-19 | 2011-09-06 | The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency | Fuel injector nozzle |
DE102008039920A1 (en) * | 2008-08-27 | 2010-03-04 | Continental Automotive Gmbh | Nozzle body, nozzle assembly and fuel injector, and method of making a nozzle body |
-
2009
- 2009-09-21 DE DE102009042155A patent/DE102009042155A1/en not_active Ceased
-
2010
- 2010-09-16 EP EP10754337.3A patent/EP2480783B1/en active Active
- 2010-09-16 WO PCT/EP2010/063640 patent/WO2011033036A1/en active Application Filing
- 2010-09-16 US US13/497,366 patent/US9297344B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011033036A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011033036A1 (en) | 2011-03-24 |
US20120180757A1 (en) | 2012-07-19 |
US9297344B2 (en) | 2016-03-29 |
DE102009042155A1 (en) | 2011-04-07 |
EP2480783B1 (en) | 2015-06-24 |
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