EP0786049A1 - Fuel injection valve - Google Patents
Fuel injection valveInfo
- Publication number
- EP0786049A1 EP0786049A1 EP96928321A EP96928321A EP0786049A1 EP 0786049 A1 EP0786049 A1 EP 0786049A1 EP 96928321 A EP96928321 A EP 96928321A EP 96928321 A EP96928321 A EP 96928321A EP 0786049 A1 EP0786049 A1 EP 0786049A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- base body
- injection valve
- calibration sleeve
- gas
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/047—Injectors peculiar thereto injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles
-
- 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
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
-
- 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
- F02M61/1853—Orifice plates
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- a fuel injection valve for injecting a fuel-gas mixture from US Pat. No. 4,982,716 is already known, in which an adapter is provided at the downstream end of a nozzle body, into which a gas can be introduced.
- the gas is supplied via two feed channels or holes which run obliquely to the longitudinal axis of the valve and which open into an inner spray region of the adapter such that the gas hits the fuel either upstream or downstream of a centrally arranged impact surface.
- the impact surface divides the fuel into two spray holes.
- the supply channels for the gas have a constant diameter and circular cross section over their length.
- the metering cross section In order to guarantee an exact metering of the gas, the metering cross section must be made with high dimensional accuracy. Since the entire adapter must be handled when introducing the feed channels, this processing step is comparatively cost-intensive. In addition, the size of the feed channels once introduced can no longer be varied.
- Air supply or measurement and the attachment to the injection valve are solved together, so that an optimum of both functions is hardly possible due to the integration.
- the fuel injector according to the invention with the characterizing features of the main claim in contrast, has the advantage of greater freedom of design and inexpensive to manufacture due to a functional separation in the front body of the
- Fuel injection valve which is used for fuel processing by means of a gas provided and metered in it.
- gas supply and metering there is an advantageous functional separation of gas supply and metering compared to the sealing of the fuel injector to an intake line and the attachment of the attachment body to the fuel injector, so that each function is better guaranteed.
- attachment body in such a way that at least one calibration sleeve for metering the gas can be installed in a base body.
- the calibration sleeves are mainly responsible for the gas supply and metering.
- Fuel injector maintained or reinforced.
- Calibration sleeves can be used. In this sense, there is a modular system.
- the materials of the base body and the calibration sleeves can advantageously differ from one another.
- individual requirement criteria only play a very minor role, such as: B. temperature sensitivity.
- FIG. 1 shows a partially illustrated fuel injector with an attachment body according to the invention
- FIG. 2 shows a second example of an attachment body
- FIG. 3 shows a third example of an attachment body
- FIG. 4 shows a section of an attachment body with a stepped calibration sleeve
- FIG. 5 shows a section of an attachment body with a partially conical one Calibration sleeve
- Figure 6 shows a calibration sleeve with beads on its circumference
- Figure 7 shows a calibration sleeve with prongs on its circumference. Description of the exemplary embodiments
- a valve in the form of a fuel injection valve for fuel injection systems of mixture-compressing spark-ignition internal combustion engines is partially shown as a first exemplary embodiment. Together with an attachment body according to the invention, the fuel injection valve serves to inject a fuel-gas mixture into an intake pipe or directly into a combustion chamber of the internal combustion engine.
- the fuel injection valve 1 which can be actuated electromagnetically, for example, extends concentrically along a longitudinal axis 2 of the valve.
- the fuel injection valve 1 has a nozzle body 5 which extends at the downstream end.
- a stepped longitudinal bore 7 is formed, which runs concentrically to the longitudinal valve axis 2 and in which a z. B. needle-shaped valve closing part 10 is arranged.
- the valve closing part 10 has, for example, two guide sections 11, 12 which, together with a guide region 13 of the wall of the longitudinal bore 7 of the nozzle body 5, serve to guide the valve closing part 10.
- the longitudinal bore 7 of the nozzle body 5 has at its downstream end a fixed valve seat 15 tapering in the direction of the fuel flow, which together with a sealing section 17 of the valve closing part 10 tapering in the fuel flow direction forms a seat valve.
- valve closing part 10 At its end facing away from the sealing section 17, the valve closing part 10 is connected to a tubular armature 20 which has a magnetic core 22 partially surrounding the armature 20 in the axial direction and a tubular core 23 opposite the armature 20 in the direction away from the fixed valve seat 15 Fuel injector 1 interacts.
- a return spring 25 At the end of the valve closing part 10 connected to the armature 20 there is a return spring 25 with one end, which strives to move the valve closing part 10 in the direction of the fixed valve seat 15. With its other end, the return spring 25 is supported on a z.
- B. non-magnetic adjusting sleeve 27 At its end facing away from the sealing section 17, the valve closing part 10 is connected to a tubular armature 20 which has a magnetic core 22 partially surrounding the armature 20 in the axial direction and a tubular core 23 opposite the armature 20 in the direction away from the fixed valve seat 15 Fuel injector 1 interacts.
- a return spring 25 At the end of the valve
- an injection orifice disk 32 which is fixedly connected to the nozzle body 5, for example, by means of a weld seam produced by means of laser welding.
- the spray orifice plate 32 has, for example, four spray openings 33 through which the fuel flowing past the valve seat 15 when the valve closing part 10 is lifted off is sprayed off.
- Fuel injector 1, an attachment body 50 is provided, for example made of plastic.
- Exhaust gas from the internal combustion engine or a mixture of air and exhaust gas can be used.
- the use of recirculated exhaust gas enables a reduction in the pollutant emissions of the internal combustion engine.
- the supply of the gas to the attachment body 50 is not shown in more detail in FIG. 1.
- the attachment body 50 is formed by at least one base body 51 and by at least one calibration sleeve 52 according to the invention, which can be inserted or inserted into the base body 51.
- the base body 51 is, for. B. an injection molded part made of plastic and has a full axial passage 55 for a fluid that is very variable in design can be designed according to the valve design.
- the base body 51 also extends in the axial direction downstream of the downstream end of the nozzle body 5 with the spray openings 33.
- the base body 51 has z. B. an outer contour that does not run with a constant diameter over its axial extent. Rather, the base body 51 has, for example, an upper section 57 at the level of the downstream end of the nozzle body 5, the outer contour of which extends inclined to the longitudinal axis 2 of the valve, the diameter of the base body 51 increasing in the downstream direction.
- a lower, downstream section 58 of the base body 51 follows, on the circumference of which, for. B. a circumferential annular groove 59 is provided.
- a sealing ring 60 can be inserted into the annular groove 59 for sealing between the circumference of the injection valve or the attachment body 50 and a valve receptacle (not shown), for example the intake line of the internal combustion engine.
- the entire attachment body 50 is on the injection valve, especially on the nozzle body 5 z. B. by engaging a circumferentially formed in the upper section 57 on the inner passage 55, extending radially from the inner wall in the direction of the longitudinal valve axis 2 and having a small height, bead 62 in a circumferential groove 64 on the nozzle body 5 so that no risk of loosening the Connection due to vibrations or temperature effects.
- a suitable selection of the bead 62 and the groove 64 can also ensure complete security against rotation.
- interlocking and interacting depressions or elevations on the bead 62 and in the groove 64 the anti-rotation is achieved.
- other types of connection of the attachment body 50 on the nozzle body 5 instead of snapping or snapping are conceivable, such as. B. gluing or shrinking, which, however, result in permanent connections.
- the passage 55 is divided into three axially successive sections.
- a first upstream passage section 66 is designed in diameter so that the downstream end of the nozzle body 5 can be received in it.
- the passage section 66 has a slightly smaller opening width than over its remaining length. With a smaller diameter than that of the
- Passage section 66 connects a second central, cylindrical passage section 67 to the passage section 66, so that a step in
- Attachment body 50 is formed, on which the nozzle body 5 z. B. with its spray plate 32 and can no longer reach into the passage section 67. In the downstream direction, the middle passage section 67 is immediately followed by a third lower one
- Passage section 68, the z. B. is characterized by two openings 69. If, for example, a dual-jet fuel injector 1 for injecting fuel in the direction of two intake valves is to be achieved or maintained, it is expedient to provide a beam splitter 70 in the lower passage section 68 of the base body 51, which extends between the two openings 69.
- the beam splitter 70 can be the most varied
- the web-like beam splitter 70 is shown by way of example with a pointed cutting edge, which is directed towards the spraying orifice plate 32, while, starting from the cutting edge, the beam splitter 70 widens in cross section in the downstream direction, so that it has a triangular cross section.
- the double radiation, the z. B. is already generated by the spray openings 33 of the spray plate 32, but can be impaired by an intermediate gas supply, is retained by the beam splitter 70 or is amplified.
- a beam splitter 70 in the base body 51 can of course also be dispensed with if the fuel does not have to have multiple beams.
- the gas supply to the fuel passing through the passage 55 takes place via one or more calibration sleeves 52.
- the calibration sleeves 52 are inserted into passage openings 72 of the base body 51, which, for. B. obliquely to the longitudinal valve axis 2, starting from the inclined upper section 57 of the outer contour through the base body 51 through to the walls of the openings 69 of the lower passage section 68.
- the outer diameter of the calibration sleeves 52 and the diameter of the through openings 72 are selected so that there is an interference fit and thus the calibration sleeves 52 cannot slip.
- the hollow cylindrical calibration sleeves 52 have a continuous inner longitudinal opening 73 through which the gas is supplied.
- the inner longitudinal openings 73 are made or calibrated very precisely in their cross section and determine or measure the one flowing into the passage 55
- the calibration sleeve 52 At its upper end, the calibration sleeve 52 z. B. on a flat collar 75, which has a larger diameter than the through opening 72 and which bears against the upper portion 57 of the outer contour of the base body 51.
- the calibration sleeve 52 At its upper end, the calibration sleeve 52 z. B. on a flat collar 75, which has a larger diameter than the through opening 72 and which bears against the upper portion 57 of the outer contour of the base body 51.
- the calibration sleeves 52 can now be produced as small parts in large quantities much more cost-effectively using simple machining processes.
- the materials of the base body 51 and the calibration sleeves 52 can thus also advantageously differ from one another.
- the base body 51 can be, for example, an injection molded part made of plastic; however, other materials are also conceivable.
- individual requirement criteria only play a very minor role, such as. B. the temperature sensitivity. This results in greater freedom of design for the attachment body 50.
- the calibration sleeves 52 of the exemplary embodiment in FIG. 2 differ from those in FIG that their inner longitudinal openings 73 along the opening width change the flow. This can e.g. B., as shown, take place via a step 77 or continuously continuously in the form of conical openings.
- the lower passage section 68 is e.g. B. is designed as a complete conical opening section widening in the flow direction, ie it has no beam splitter.
- the outer contour of the base body 51 is present in a somewhat modified form, for example in that the base body 51 is not completely beveled in its upper section 57, but instead has an upper cylindrical end section 78.
- FIG. 3 shows an attachment body 50 with a base body 51, which has a perpendicular outer contour, that is to say parallel to the valve longitudinal axis 2, in the area of the upper section 57.
- the upper section 57 thus has a cylindrical shape and surrounds the downstream end of the nozzle body 5, which is only indicated schematically, just as in the exemplary embodiments already described.
- the calibration sleeves 52 Due to the vertical outer contour of section 57, the calibration sleeves 52 extend z. B. horizontally, at right angles to the longitudinal axis 2 of the valve up to the inner passage 55. With their collars 75 they in turn rest against the outer wall of the upper section 57.
- Calibration sleeves 52 now open z. B. in the central, cylindrical passage section 67 of the passage 55, since the section 57 extends axially in the downstream direction as far as the middle passage section 67.
- FIG. 4 shows further embodiments of calibration sleeves 52, the z. B. are arranged as in the embodiment shown in FIG. 3, ie extend horizontally from the outer section 57 to the central passage section 67.
- FIG. 4 An example of a calibration sleeve 52 can be seen, which neither extends to the outer wall of section 57 nor to the wall of passage section 67, but ends just before on both sides.
- the passage opening 72 in the base body 51 for fitting the calibration sleeve 52 is, for. B. stepped, since a shoulder 79 is provided in the base body 51, through which the diameter of the passage opening 72 is reduced towards the valve longitudinal axis 2.
- a conical taper 80 of the longitudinal opening 73 can also be provided, by means of which the gas throughput can be brought to a desired value.
- the calibration sleeve 52 shown in FIG. 5 has an inner longitudinal opening 73 with a step 77 that reduces the opening width.
- the passage opening 72 now has a conical taper 81, which in turn also specifies the outer contour of the calibration sleeve 52.
- the calibration sleeve 52 thus likewise has a conical outer region which is designed in accordance with the taper of the through opening 72.
- the passage opening 72 is e.g. B. formed with a diameter that corresponds to the diameter of the calibration sleeve 52 at the end of the conical taper.
- FIGS. 6 and 7 show two calibration sleeves 52 which are distinguished by additional security measures.
- the calibration sleeves 52 pressed into the through-openings 72 can e.g. B. have on their outer circumference anti-slip devices such as rounded beads 84 or pointed prongs 85, which claw into the material of the base body 51 and thus represent a safeguard against the calibration sleeves 52 from slipping.
- outer circumference anti-slip devices such as rounded beads 84 or pointed prongs 85, which claw into the material of the base body 51 and thus represent a safeguard against the calibration sleeves 52 from slipping.
- So z. B. the number of calibration sleeves 52 per attachment body 50 variable.
- calibration sleeves 52 may or may not be directly aligned with the spray openings 33 of the spray orifice plate 32 of the fuel injection valve 1. Except for the circular shown
- the calibration sleeve 52 can, for. B. a collar 75 ( Figures 1, 2, 3, 6, 7), a shoulder 79 ( Figure 4) or a cone ( Figure 5). If the pressing is sufficiently large, a variant without protection is also conceivable.
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 |
---|---|---|---|
DE19529375A DE19529375A1 (en) | 1995-08-10 | 1995-08-10 | Fuel injector |
DE19529375 | 1995-08-10 | ||
PCT/DE1996/001358 WO1997006365A1 (en) | 1995-08-10 | 1996-07-24 | Fuel injection valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0786049A1 true EP0786049A1 (en) | 1997-07-30 |
EP0786049B1 EP0786049B1 (en) | 2001-04-04 |
Family
ID=7769132
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96928321A Expired - Lifetime EP0786049B1 (en) | 1995-08-10 | 1996-07-24 | Fuel injection valve |
Country Status (7)
Country | Link |
---|---|
US (1) | US5904299A (en) |
EP (1) | EP0786049B1 (en) |
JP (1) | JPH10507509A (en) |
KR (1) | KR970706454A (en) |
CN (1) | CN1066243C (en) |
DE (2) | DE19529375A1 (en) |
WO (1) | WO1997006365A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6095437A (en) * | 1998-01-26 | 2000-08-01 | Denso Corporation | Air-assisted type fuel injector for engines |
DE19857244A1 (en) * | 1998-12-11 | 2000-06-15 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
DE10059681A1 (en) * | 2000-12-01 | 2002-06-06 | Bosch Gmbh Robert | Method for blowing fuel out of a volume of a fuel injector |
US6631857B2 (en) | 2000-12-22 | 2003-10-14 | Caterpillar Inc | Partially plastic fuel injector component and method of making the same |
US6561167B2 (en) * | 2001-02-16 | 2003-05-13 | Synerject, Llc | Air assist fuel injectors |
DE10319582B4 (en) * | 2003-04-24 | 2007-03-22 | Lechler Gmbh | Binary spray nozzle |
JP4090972B2 (en) * | 2003-09-19 | 2008-05-28 | 日産ディーゼル工業株式会社 | Engine exhaust purification system |
DE10358724A1 (en) * | 2003-12-15 | 2005-07-14 | Robert Bosch Gmbh | Fuel injection system for a spark-ignited internal combustion engine comprises a gas channel supplying gas to the fuel downstream of a sealing seat |
JP4595924B2 (en) * | 2006-02-09 | 2010-12-08 | 株式会社デンソー | Fuel injection valve |
US8672234B2 (en) | 2010-05-20 | 2014-03-18 | Enginetics, Llc | Multi-physics fuel atomizer and methods |
JP5618751B2 (en) * | 2010-10-08 | 2014-11-05 | 株式会社ケーヒン | Gas fuel injection valve |
JP5811979B2 (en) * | 2012-09-24 | 2015-11-11 | 株式会社デンソー | Fuel injection valve |
CN102828875A (en) * | 2012-09-28 | 2012-12-19 | 重庆大学 | Oil-water instantaneous emulsifying injector for diesels |
US9518547B2 (en) * | 2015-05-07 | 2016-12-13 | Caterpillar Inc. | Fuel injector including extensions for split spray angles |
US10961965B2 (en) | 2015-10-16 | 2021-03-30 | Nostrum Energy Pte. Ltd. | Method of modifying a conventional direct injector and modified injector assembly |
CN113719374B (en) * | 2021-07-29 | 2023-03-24 | 东风商用车有限公司 | Fuel supply channel applied to side jet ignition system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3717256A1 (en) * | 1987-05-22 | 1988-12-01 | Seitz Enzinger Noll Masch | METHOD AND DEVICE FOR FILLING CARBONIC LIQUIDS, IN PARTICULAR DRINKS, UNDER BACK PRESSURE IN VESSEL OD. DGL. |
US4982716A (en) * | 1988-02-19 | 1991-01-08 | Toyota Jidosha Kabushiki Kaisha | Fuel injection valve with an air assist adapter for an internal combustion engine |
US5035358A (en) * | 1989-03-22 | 1991-07-30 | Toyota Jidosha Kabushiki Kaisha | Fuel injector for use in an engine |
DE4103918B4 (en) * | 1990-02-15 | 2005-05-04 | Aisan Kogyo K.K., Obu | Multi-hole injection nozzle device |
DE4009320A1 (en) * | 1990-03-23 | 1991-09-26 | Bosch Gmbh Robert | Device for injecting mixt. of fuel and gas |
DE4035312A1 (en) * | 1990-11-07 | 1992-05-14 | Bosch Gmbh Robert | DEVICE FOR INJECTING A FUEL-GAS MIXTURE |
US5218943A (en) * | 1991-01-07 | 1993-06-15 | Toyota Jidosha Kabushiki Kaisha | Fuel injection apparatus for internal combustion engine |
JP2778292B2 (en) * | 1991-06-06 | 1998-07-23 | トヨタ自動車株式会社 | Fuel injection device for internal combustion engine |
JP3053934B2 (en) * | 1991-10-31 | 2000-06-19 | 愛三工業株式会社 | Multi-hole injector |
IT1260961B (en) * | 1993-08-06 | 1996-04-29 | Weber Srl | HIGH ATOMIZATION INJECTOR, IN PARTICULAR FOR THE SUPPLY OF MOTOR VEHICLE ENGINES |
JPH07103100A (en) * | 1993-08-09 | 1995-04-18 | Mitsubishi Electric Corp | Fuel injection valve |
US5772122A (en) * | 1995-04-27 | 1998-06-30 | Nippondenso Co., Ltd. | Fuel injection apparatus for an internal combustion engine |
-
1995
- 1995-08-10 DE DE19529375A patent/DE19529375A1/en not_active Ceased
-
1996
- 1996-07-24 KR KR1019970702142A patent/KR970706454A/en active IP Right Grant
- 1996-07-24 WO PCT/DE1996/001358 patent/WO1997006365A1/en active IP Right Grant
- 1996-07-24 US US08/809,804 patent/US5904299A/en not_active Expired - Fee Related
- 1996-07-24 CN CN96190749A patent/CN1066243C/en not_active Expired - Fee Related
- 1996-07-24 EP EP96928321A patent/EP0786049B1/en not_active Expired - Lifetime
- 1996-07-24 DE DE59606717T patent/DE59606717D1/en not_active Expired - Fee Related
- 1996-07-24 JP JP9508008A patent/JPH10507509A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9706365A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1997006365A1 (en) | 1997-02-20 |
DE19529375A1 (en) | 1997-02-13 |
CN1158153A (en) | 1997-08-27 |
JPH10507509A (en) | 1998-07-21 |
CN1066243C (en) | 2001-05-23 |
US5904299A (en) | 1999-05-18 |
KR970706454A (en) | 1997-11-03 |
EP0786049B1 (en) | 2001-04-04 |
DE59606717D1 (en) | 2001-05-10 |
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