US3656693A - Fuel injection nozzle for externally ignited internal combustion engines - Google Patents

Fuel injection nozzle for externally ignited internal combustion engines Download PDF

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Publication number
US3656693A
US3656693A US53587A US3656693DA US3656693A US 3656693 A US3656693 A US 3656693A US 53587 A US53587 A US 53587A US 3656693D A US3656693D A US 3656693DA US 3656693 A US3656693 A US 3656693A
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United States
Prior art keywords
nozzle
liquid
air chamber
fuel
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.)
Expired - Lifetime
Application number
US53587A
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English (en)
Inventor
Konrad Eckert
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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
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Publication of US3656693A publication Critical patent/US3656693A/en
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    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • 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
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air
    • F02M69/22—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air the device comprising a member movably mounted in the air intake conduit and displaced according to the quantity of air admitted to the engine
    • 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
    • F02M69/28—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for cutting-out the fuel supply to the engine or to main injectors during certain operating periods, e.g. deceleration

Definitions

  • This invention relates to a fuel injection nozzle for externally ignited internal combustion engines of automotive vehicles.
  • the said noule is of the type wherein the fuel is injected into a suction tube of the engine, first, by means of a liquid nozzle through an intermediate air chamber and thereafter, by means of an intermediate nozzle which; is aligned with the liquid nozzle.
  • the intermediate air chamber is supplied with air under pressure.
  • fuel injection nozzles of the aforenoted type are to premix the fuel with pressurized air prior to its injection into the suction tube in order to achieve a better combustion.
  • Known fuel injection nozzles of this type are,
  • FIG. 1 is a schematic view of a fuel injection system incorporating the fuel, injection nozzle according to the invention
  • FIG. 2 is an axial sectional view of a preferred embodiment of a fuel injection nozzle according to the invention
  • FIG. 3 is a sectional view along line III-III of FIG. 2; and FIG. 4 is a sectional view along line IV-IV of FIG. 2.
  • FIG. I in the fuel injection system shown,
  • the intake air drawn in the direction of the arrow through the suction tube 1 flows past an arbitrarily operable butterfly valve 2'and an impact plate 3 arranged nonnal to the direction of flow. Therefrom the air flows to the cylinders (not shown) of an internal combustion engine (also not shown).
  • the fuel is drawn from a tank 4 by means of a fuel pump 6 driven by an electromotor 5 and is continuously delivered through a fuel conduit 7 to a fuel metering device 8. From the conduit 7 there extends a return conduit 9 which terminates in the fuel tank 4 and in which there is disposed a pressure limiting valve 10 for the purpose of maintaining the pressure constant in the fuel conduit. From the fuel metering device 8 there extend fuel conduits 11 (only one shown) each of which leads to an injection nozzle 12.
  • a three-dimensional cam is rotatable by the impact plate 3 through a guide rod 13 and a lever 14.
  • the three-dimensional cam 15 is further axially displaced by means not shown,
  • the electromotor 5 also drives an air pump 18 which delivers air under a predetermined pressure through conduit 19 to each injection nozzle From the fuel conduit 7 there leads a control conduit 21 to the injection nozzle 12.
  • a shut-ofl' member 22 which may be opened, for example, by means of a pneumatic setting member 23.
  • the latter is connected, through a conduit24, with a locationof suction tube 1 that is' downstream of the impact plate 3.
  • the vacuum generated in the suctiontube causes opening of the shut-ofi member 22.
  • communication is established between the pressurized fuel conduit 7 and the control conduit 21. The pressure thus transmitted to the latter affects the fuel injection nozzle 12 as will be set forth hereinbelow.
  • FIGS. 2, 3 and 4 in the fuel injection nozzle shown, the fuel is admitted from the conduit ll'through a channeled coupling ring '27 and radial bore 28 to an annular chamber 30 provided in a sleeve 29 threadedly held in a nozzle holder 33.
  • the inner boundary of the annular chamber 30 is defined by a tube 31, the inner bore of which is connected with the control conduit 21 through a bore 32 extending axially in the sleeve 29.
  • the sleeve 29 axially delirnits an annular chamber 34 communicating with the conduit 19 through a radial bore 35.
  • the inner boundary of the annular chamber 34 is formed by a casing 36, the frontal face of which'contains a central opening which constitutes a liquid nozzle 37.
  • the casing 36 is, together with a replaceable nonle ring 38, clamped between the sleeve 29 and the nozzle holder 33.
  • the casing 36 -includes a coaxial inner tube portion 36'. In this manner a jacketed structure is obtained.
  • the annular chamber 39 defined by the walls 36 and 36 communicates with the annular chamber 30 through a filter 40.
  • the fuel admitted through conduit 11 is introduced through tangentially merging bores 41 into a vortex chamber 42 (FIG. 3) and therefrom it is injected in a turbulent condition, through the liquid nozzle 37 into an intermediate air chamber 43 which is defined by the nozzle ring 38.
  • the fuel-air mixture is injected through the intermediate or secondary nozzle 44 into the suction tube of the internal combustion engine.
  • the nozzle ring 38 there are provided radial bores 45, the cross section of which has a predetermined value.
  • a nozzle ring 38 may. be selected and built into the nozzle.
  • a piston 47 In the inner bore 36" there is reciprocable and rotatable with a snug fit a piston 47, a radial face 48 of which is affected by the control liquid admitted through the conduit 21.
  • the piston 47 moves downwardly and displaces with its other radial face 49 a valve member 50 against the force of a return spring 51 and against the pressure prevailing in the vortex chamber 42.
  • the terminus of the valve member 50 hermetically obturates the liquid nozzle 37.
  • the valve member 50 is guided by a stationary ring 52 provided with axially extending grooves 52' which establish communication between the vortex chamber 42 and the chamber accommodating the spring 51.
  • control conduit 21 is depressurized (for example,
  • said fuelinjection nozzle being of the known type that includes (A) a liquid nozzle, (8) anintennediate air chamber into whichfuel is introduced through said liquid nozzle, (C)
  • a fuel injection nozzle associated with an externally ignited-intemal combustion engine including a suction tube, said fuel injection nozzle being of the known type that includes (A) a liquid nozzle, (B) an intermediate airchamber into which fuel is introduced through said liquid nozzle, (C) means for introducing air under pressure into said intermediate air chamber and (D) an intermediate or secondary nozzle injecting fuel from said intermediate air chamber into said suction tube, the improvement comprising,
  • a reciprocable-piston having a. a first radial face exposed to said liquid control .means, b. a section radial face operatively connected to said valve'member to displace the latter when said piston shifts in response to said liquid control means and C. return means in engagement with said closing means and 4 opp means.
  • a fuel injection nozzle associated with an externally ignited internal combustion engine including a suction tube
  • said fuel injection noule being of the known type that in cludes (A) a liquid nozzle, (B) an intermediate air chamber into which fuel is introduced through said liquid nonle, (C) meansfor introducing air under pressure into said intermediate airchamber and (D) an intemiediate orsecondary noule injectingfuel from'said intermediate air chamber into said suction tube, the improvement comprising,
  • a fuel injection nozzle associated with an internal combustion engine including a suction tube, the improvement comprising A. housing means, y
  • closing means cooperating solely with said liquid nozzle, said closing means being movable into a closed position to obturate said liquid nozzle and into an open position to establish communication between said intermediate air chamber and said first channel means,
  • liquid control means for moving said closingmeans and l. retum means in engagement with said closing means and opposing the force exerted thereon by said liquid control means.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US53587A 1969-07-09 1970-07-09 Fuel injection nozzle for externally ignited internal combustion engines Expired - Lifetime US3656693A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1934704A DE1934704C3 (de) 1969-07-09 1969-07-09 Regeleinrichtung für eine Kraftstoffeinspritzdüse für fremdgezündete Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3656693A true US3656693A (en) 1972-04-18

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ID=5739251

Family Applications (1)

Application Number Title Priority Date Filing Date
US53587A Expired - Lifetime US3656693A (en) 1969-07-09 1970-07-09 Fuel injection nozzle for externally ignited internal combustion engines

Country Status (5)

Country Link
US (1) US3656693A (enrdf_load_stackoverflow)
JP (1) JPS4838646B1 (enrdf_load_stackoverflow)
DE (1) DE1934704C3 (enrdf_load_stackoverflow)
FR (1) FR2054421A5 (enrdf_load_stackoverflow)
GB (1) GB1289575A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4595144A (en) * 1982-11-11 1986-06-17 Deutsche-Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. Injection device, more particularly for direct-injection diesel engines
US4834218A (en) * 1986-11-28 1989-05-30 Madison-Kipp Corporation Lubricating nozzle apparatus and method
US4955953A (en) * 1988-11-15 1990-09-11 Kls International Corporation Lubricating device
US5146904A (en) * 1991-06-20 1992-09-15 Outboard Marine Corporation Internal combustion engine fuel supply system
US5174505A (en) * 1991-11-01 1992-12-29 Siemens Automotive L.P. Air assist atomizer for fuel injector
US5197674A (en) * 1990-02-23 1993-03-30 Robert Bosch Gmbh Apparatus for injecting a fuel-gas mixture into an internal combustion engine
US5207383A (en) * 1990-02-16 1993-05-04 Robert Bosch Gmbh Device for injecting a fuel/air mixture into an internal combustion system
US5220900A (en) * 1991-02-07 1993-06-22 Siemens Automotive L.P. Air assist atomizer for fuel injector
US5232163A (en) * 1990-11-07 1993-08-03 Robert Bosch Gmbh Apparatus for injecting a fuel/gas mixture
US5411212A (en) * 1993-06-23 1995-05-02 Mitsubishi Denki Kabushiki Kaisha Fuel injection valve
US5597121A (en) * 1993-06-23 1997-01-28 Mitsubishi Denki Kabushiki Kaisha Fuel injection valve
US6526746B1 (en) * 2000-08-02 2003-03-04 Ford Global Technologies, Inc. On-board reductant delivery assembly
US20030213858A1 (en) * 2001-11-17 2003-11-20 Hartmut Albrodt Dual component injector

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5420535U (enrdf_load_stackoverflow) * 1977-07-13 1979-02-09
JPS53166530U (enrdf_load_stackoverflow) * 1978-07-14 1978-12-27
DE3240554C2 (de) * 1982-11-03 1993-10-07 Bosch Gmbh Robert Kraftstoffeinspritzventil für eine Brennkraftmaschine
JP2996525B2 (ja) * 1991-03-20 2000-01-11 株式会社日立製作所 燃料噴射弁
DE4431382C2 (de) * 1994-08-29 1999-11-11 Mws Schneidwerkzeuge Gmbh Rundmesser für Allesschneider
DE10004836C1 (de) * 2000-02-01 2001-10-31 Mws Schneidwerkzeuge Gmbh & Co Rundmesser für Allesschneider und Vorrichtung zur Herstellung der Schneidezahnung
DE102004059479B4 (de) 2004-05-13 2006-04-06 Astor Schneidwerkzeuge Gmbh Rotationsmesser

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083913A (en) * 1961-08-21 1963-04-02 Wald Ind Inc Apparatus for marking a surface

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083913A (en) * 1961-08-21 1963-04-02 Wald Ind Inc Apparatus for marking a surface

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4595144A (en) * 1982-11-11 1986-06-17 Deutsche-Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. Injection device, more particularly for direct-injection diesel engines
US4834218A (en) * 1986-11-28 1989-05-30 Madison-Kipp Corporation Lubricating nozzle apparatus and method
US4955953A (en) * 1988-11-15 1990-09-11 Kls International Corporation Lubricating device
US5207383A (en) * 1990-02-16 1993-05-04 Robert Bosch Gmbh Device for injecting a fuel/air mixture into an internal combustion system
US5197674A (en) * 1990-02-23 1993-03-30 Robert Bosch Gmbh Apparatus for injecting a fuel-gas mixture into an internal combustion engine
US5232163A (en) * 1990-11-07 1993-08-03 Robert Bosch Gmbh Apparatus for injecting a fuel/gas mixture
US5220900A (en) * 1991-02-07 1993-06-22 Siemens Automotive L.P. Air assist atomizer for fuel injector
US5146904A (en) * 1991-06-20 1992-09-15 Outboard Marine Corporation Internal combustion engine fuel supply system
US5174505A (en) * 1991-11-01 1992-12-29 Siemens Automotive L.P. Air assist atomizer for fuel injector
US5411212A (en) * 1993-06-23 1995-05-02 Mitsubishi Denki Kabushiki Kaisha Fuel injection valve
US5597121A (en) * 1993-06-23 1997-01-28 Mitsubishi Denki Kabushiki Kaisha Fuel injection valve
US6526746B1 (en) * 2000-08-02 2003-03-04 Ford Global Technologies, Inc. On-board reductant delivery assembly
US20030213858A1 (en) * 2001-11-17 2003-11-20 Hartmut Albrodt Dual component injector
US6976642B2 (en) * 2001-11-17 2005-12-20 Daimlerchrysler Ag Dual component injector

Also Published As

Publication number Publication date
DE1934704B2 (de) 1977-12-22
GB1289575A (enrdf_load_stackoverflow) 1972-09-20
DE1934704C3 (de) 1978-09-14
FR2054421A5 (enrdf_load_stackoverflow) 1971-04-16
JPS4838646B1 (enrdf_load_stackoverflow) 1973-11-19
DE1934704A1 (de) 1971-03-25

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