EP0469100A1 - Dispositif d'injection d'un melange d'air et de carburant. - Google Patents

Dispositif d'injection d'un melange d'air et de carburant.

Info

Publication number
EP0469100A1
EP0469100A1 EP19910902232 EP91902232A EP0469100A1 EP 0469100 A1 EP0469100 A1 EP 0469100A1 EP 19910902232 EP19910902232 EP 19910902232 EP 91902232 A EP91902232 A EP 91902232A EP 0469100 A1 EP0469100 A1 EP 0469100A1
Authority
EP
European Patent Office
Prior art keywords
air
fuel
injection end
valve
fuel injection
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
Application number
EP19910902232
Other languages
German (de)
English (en)
Other versions
EP0469100B1 (fr
Inventor
Waldemar Hans
Ingo Kirsche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0469100A1 publication Critical patent/EP0469100A1/fr
Application granted granted Critical
Publication of EP0469100B1 publication Critical patent/EP0469100B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air
    • 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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • 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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • 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
    • 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

Definitions

  • the invention relates to a device for injecting a fuel-air mixture according to the preamble of the main claim.
  • a device for the injection of a fuel-air mixture (DE-OS 32 40 554) is already known, which is an injection valve with a. Acting gas guide sleeve, the spray opening is surrounded in the immediate vicinity by a gas ring gap on the gas guide sleeve which is connected to a gas ring channel.
  • the adaptation of the gas ring gap to the needs of the internal combustion engine and to different types of injection valves is only possible with great effort by moving or bending the gas guide sleeve, so that the production of this known device in large series production causes great costs, which are caused by the optimization of the Gas ring gap can be conditioned.
  • the device according to the invention for injecting a fuel-air mixture with the characterizing features of the main claim has the advantage, in contrast, that air is easily and inexpensively on a fuel injector. can be generated without an adjustment of the gas ring gap required during assembly, since this is determined by the selection of an air-encasing bushing designed according to the respective requirements.
  • the use of different Luftumfas ⁇ sungsbuchen allows the amount of air to be adapted to the respective needs of the internal combustion engine without the need for further adjustment.
  • the exact observance of the defined air gap can only be ensured without an adjustment process by directly supporting the air encasing bushing at the injection end of the fuel injection valve.
  • the small height of the air gap ensures that the intake air accelerates almost to the speed of sound and thus the fuel sprayed out of the fuel spray openings is finely atomized.
  • the mixture spray opening widens out in a funnel shape away from the end of the injection, so that even if the air emerging from the fuel injection opening is faulty, the mixture spray opening wall cannot be wetted.
  • At least one air supply opening is formed in the cylinder part of the air intake bushing, which has a radial air supply, for example from one in a suction pipe - 3 -
  • the internal combustion engine designed air channel to the annular surface of the bottom part.
  • the stop surfaces are formed by an outer interrupted ring web of the base part, which, due to the numerous stop surfaces projecting beyond the ring surface by a predetermined distance, not only ensures that the air-encasing bush is in exact contact with the fuel injection valve, but also enables a secure air supply to the ring surface through recesses formed in the interrupted ring web.
  • the ring surface is formed by an inner ring web, which has a predetermined axial distance from the injection end and thus enables the simple formation of a narrow air gap.
  • the bottom part on its inside between the stop surfaces and the inner ring land in radial direction towards the ring surface at least towards Part is formed obliquely to the injection end.
  • the formation of a circumferential air supply groove in a cylinder inner wall of the cylinder part, into which the at least one air supply opening opens, has the advantage of an improved air supply from the air supply opening past the lower end of the fuel injection valve to the annular surface.
  • a seal of the at least one air supply opening is required between the intake manifold receptacle of an internal combustion engine, in which the device according to the invention is mounted, and the circumference of the air-encasing bush.
  • an annular groove is formed on the circumference of the air encasing bushing on both sides of the air supply opening, which groove serves to receive an upper sealing ring or a lower sealing ring.
  • FIG. 1 shows a first embodiment of the device according to the invention
  • FIG. 2 shows a partial section through the device
  • FIG. 3 shows a section along the line III-III in FIG. 2
  • FIG. 4 shows an enlarged section of a second exemplary embodiment.
  • the device shown in FIG. 1, for example, for injecting a fuel-air mixture with a fuel injector 1 is mounted in an injector receptacle 2 of an intake manifold 3 of an internal combustion engine.
  • An air encasing bushing 4 of the device comprises concentrically to a longitudinal valve axis 5 an injection end 6 of the fuel injection valve 1 which is shown in FIG. 2
  • Bypass in front of a throttle valve in the intake manifold 3 or the air conveyed by an additional blower to the air encasing bush 4 takes place through at least one air duct 7 formed in the intake manifold 3.
  • the exemplary embodiment shown only partially in section in FIG. 2 shows the cup-shaped air encasing bushing 4, which has a cylinder part 10, a bottom part 11 and, in the bottom part, a cylindrical mixing opening 31 concentric to the longitudinal axis of the valve and a mixture spray opening widening in a funnel shape downstream 14 with a mixture spray opening wall 15.
  • the cylinder part 10 encloses at least partially axially and the bottom part 11 at least partially radially the lower injection end 6 of the fuel injection valve 1, which in the exemplary embodiment has two fuel injection openings 8 and which, in the exemplary embodiment shown, cooperates with a fixed valve seat surface 18 in a valve housing 17 Has valve needle 19.
  • the fuel injection openings 8 are therefore formed in a so-called perforated disk 20, which is arranged downstream of the valve seat surface 18 as part of the injection end 6.
  • a radial, inner annular web 23 reaching as far as the mixing opening 31 is formed, which has a flat radial annular surface 24 facing the injection end 6.
  • An outer interrupted ring web 25 is formed on the inside 21 of the bottom part 11 at a radial distance from the inner ring web 23 to the outside.
  • the interrupted ring web 25 has, for example, six flat stop surfaces 26 with which the air-encasing socket 4 on the perforated disk 20 of the injection end 6 of the fuel injector 1 is present.
  • a total of six recesses 29 are formed in the interrupted annular web 25 between the stop surfaces 26.
  • a defined air gap 27 is formed between the injection end 6 or the perforated disk 20 and the annular surface 24.
  • the bottom part 11 is formed on its inner side 21 in the radial direction between the interrupted ring web 25 and the inner ring web 23 towards the ring surface 24, at least in part obliquely upwards towards the injection end 6, in order to equalize the inflow of air to the air gap 27 to achieve.
  • air supply openings 28 are formed, which serve to supply air from the air duct 7 into the air encasing bushing 4.
  • the position of the air supply openings 28 with respect to the longitudinal valve axis 5 has a tangential component and / or that the air supply openings 28 are inclined with respect to the longitudinal axis 5 run.
  • the interrupted annular web 25 at least two support towers having stop faces can be formed in the base part 11 in an exemplary embodiment not shown.
  • a circumferential air supply groove 35 connected to the recesses 29, into which the air supply openings 28 open.
  • the groove base 36 and the side surface 37 of the air supply groove 35 facing away from the fuel injection openings 8 are formed by the cylinder inner wall 34.
  • the air supply groove 35 is delimited by the base part 11.
  • the air supply groove 35 enables an improved flow behavior of the air through the air supply openings 28 past the lower end of the fuel injector 1 to the air gap 27. Significant throttling of the air flow is avoided and turbulence is reduced, so that the influence on the narrow air gap 27 accelerated air is low.
  • an internal groove 42 is formed above the air supply openings 28 and receives an inner sealing ring 43.
  • the inner sealing ring 43 forms a seal between the cylinder part 10 and the valve housing 17.
  • Another possibility for forming a seal between the cylinder part 10 and the valve housing 17 is to carry out a laser sealing weld or a corresponding adhesive in the area of the air encasing bushing 4 facing away from the injection end 6.
  • the air encasing bushing 4 can be attached to the fuel injection valve 1, for example, in such a way that the abutment surfaces 26 of the interrupted annular web 25 are connected to the injection end 6 or the perforated disk 20 of the fuel injection valve 1 by gluing.
  • at least one spacer 45 can be arranged between the injection end 6 or the perforated disk 20 of the fuel injection valve 1 and the stop surfaces 26, which spacer 45 defines the height of the air gap 27 and thus also the air mass flow and the air flow Acceleration of the air influences.
  • the same and equivalent parts are identified by the same reference numerals as in Figures 1 to 3.
  • an upper annular groove 38 is formed on the circumference of the air encasing bushing 4 and serves to receive an upper sealing ring 39.
  • a lower sealing ring 41 is arranged in a lower annular groove 40 on the circumference of the air encasing bushing 4.
  • the device according to the invention for injecting a fuel-air mixture is a single-part solution.
  • the air encasing bushing 4 can advantageously be used for different valve types, but also the adaptation to different air mass flows through the use of a spacer or the exchange of the air encasing bushing 4 is possible without any problems.
  • the abutment of the stop surfaces 26 of the air encasing bush 4 at the injection end 6 or the perforated disk 20 of the fuel injection valve 1 forms an exact air gap 27, so that there is a defined acceleration of the air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Les dispositifs connus d'injection d'un mélange d'air et de carburant ont des possibilités limitées et coûteuses d'adaptation aux courants massiques d'air requis dans des cas individuels. D'autres dispositifs à soupapes normalisées d'injection occupent beaucoup de place et ont une structure complexe. Un nouveau dispositif à l'avantage d'être une pièce détachée utilisable avec différentes soupapes d'injection de carburant sans réglages supplémentaires. La douille (4) de canalisation d'air a des faces de butée (26) qui s'appuient sur l'extrémité d'injection (6, 20) de la soupape (1) d'injection de carburant, formant avec celle-ci une fente étroite (27), de sorte que l'air est accéléré jusqu'à une vitesse presque sonique et atomise finement le carburant injecté par les orifices (8) d'injection de carburant. Ce dispositif d'injection d'un mélange d'air et de carburant est particulièrement utile pour l'injection dans le collecteur d'admission d'un moteur à combustion interne à allumage commandé.
EP91902232A 1990-02-16 1991-01-21 Dispositif d'injection d'un melange d'air et de carburant Expired - Lifetime EP0469100B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4004897 1990-02-16
DE4004897A DE4004897C1 (en) 1990-02-16 1990-02-16 IC engine fuel charge feed - has mix injection orifice coaxial to valve axis in base of sleeve
PCT/DE1991/000048 WO1991012427A1 (fr) 1990-02-16 1991-01-21 Dispositif d'injection d'un melange d'air et de carburant

Publications (2)

Publication Number Publication Date
EP0469100A1 true EP0469100A1 (fr) 1992-02-05
EP0469100B1 EP0469100B1 (fr) 1994-11-09

Family

ID=6400332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91902232A Expired - Lifetime EP0469100B1 (fr) 1990-02-16 1991-01-21 Dispositif d'injection d'un melange d'air et de carburant

Country Status (8)

Country Link
US (1) US5207383A (fr)
EP (1) EP0469100B1 (fr)
JP (1) JP3083556B2 (fr)
KR (1) KR0185730B1 (fr)
BR (1) BR9104467A (fr)
DE (2) DE4004897C1 (fr)
ES (1) ES2064992T3 (fr)
WO (1) WO1991012427A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5211682A (en) * 1991-06-11 1993-05-18 Nippondenso Co., Ltd. Fuel feed apparatus of internal combustion engine and manufacturing method therefor
US5449120A (en) * 1991-06-11 1995-09-12 Nippondenso Co., Ltd. Fuel feed apparatus of internal combustion engine
CZ69294A3 (en) * 1991-10-21 1994-07-13 Orbital Eng Pty Process and apparatus for feeding liquids
US5174505A (en) * 1991-11-01 1992-12-29 Siemens Automotive L.P. Air assist atomizer for fuel injector
DE4205887A1 (de) * 1992-02-26 1993-09-02 Bosch Gmbh Robert Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
JP2822847B2 (ja) * 1993-06-23 1998-11-11 三菱電機株式会社 燃料噴射弁
US5499603A (en) * 1993-10-27 1996-03-19 Vinokur; Michael Liquid injection system for internal combustion engine
FR2727721A1 (fr) * 1994-12-01 1996-06-07 Magneti Marelli France Injecteur a jupe de dispersion de carburant
DE19505886A1 (de) * 1995-02-21 1996-08-22 Bosch Gmbh Robert Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches
DE19522284B4 (de) * 1995-06-20 2007-05-10 Robert Bosch Gmbh Brennstoffeinspritzventil
US5765750A (en) * 1996-07-26 1998-06-16 Siemens Automotive Corporation Method and apparatus for controlled atomization in a fuel injector for an internal combustion engine
JP3134813B2 (ja) * 1997-06-20 2001-02-13 トヨタ自動車株式会社 内燃機関の燃料噴射弁
US6959699B2 (en) * 2003-11-03 2005-11-01 Caterpillar Inc Injection of fuel vapor and air mixture into an engine cylinder

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US3272441A (en) * 1965-11-03 1966-09-13 Gulf Research Development Co Aspirating spray nozzle
DE1934704C3 (de) * 1969-07-09 1978-09-14 Robert Bosch Gmbh, 7000 Stuttgart Regeleinrichtung für eine Kraftstoffeinspritzdüse für fremdgezündete Brennkraftmaschinen
DE2746863A1 (de) * 1977-10-19 1979-04-26 Hofmann Walter Maschf Farbspritzpistole
JPS58195058A (ja) * 1982-05-07 1983-11-14 Toyota Motor Corp 燃料噴射式内燃機関のエアアシスト装置
JPS5943962A (ja) * 1982-09-06 1984-03-12 Toyota Motor Corp 複吸気エンジンの燃料噴射弁装置
DE3234829A1 (de) * 1982-09-21 1984-03-22 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Einspritzvorrichtung fuer einen dieselmotor
DE3240554C2 (de) * 1982-11-03 1993-10-07 Bosch Gmbh Robert Kraftstoffeinspritzventil für eine Brennkraftmaschine
JPS59131575U (ja) * 1983-02-23 1984-09-04 トヨタ自動車株式会社 電子制御機関用燃料噴射弁
DE3704330A1 (de) * 1986-03-04 1987-09-10 Volkswagen Ag Kraftstoffeinspritzeinrichtung
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
FR2635827B1 (fr) * 1988-08-30 1993-11-26 Solex Dispositif d'injection de combustible a chambre d'aeration
US5035358A (en) * 1989-03-22 1991-07-30 Toyota Jidosha Kabushiki Kaisha Fuel injector for use in an engine

Non-Patent Citations (1)

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Title
See references of WO9112427A1 *

Also Published As

Publication number Publication date
ES2064992T3 (es) 1995-02-01
EP0469100B1 (fr) 1994-11-09
DE4004897C1 (en) 1991-06-06
JP3083556B2 (ja) 2000-09-04
DE59103475D1 (de) 1994-12-15
KR0185730B1 (ko) 1999-03-20
JPH04505494A (ja) 1992-09-24
KR920701667A (ko) 1992-08-12
US5207383A (en) 1993-05-04
WO1991012427A1 (fr) 1991-08-22
BR9104467A (pt) 1992-04-21

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