EP0770175B1 - Dispositif d'injection de carburant destine a un moteur a combustion interne - Google Patents

Dispositif d'injection de carburant destine a un moteur a combustion interne Download PDF

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Publication number
EP0770175B1
EP0770175B1 EP95942026A EP95942026A EP0770175B1 EP 0770175 B1 EP0770175 B1 EP 0770175B1 EP 95942026 A EP95942026 A EP 95942026A EP 95942026 A EP95942026 A EP 95942026A EP 0770175 B1 EP0770175 B1 EP 0770175B1
Authority
EP
European Patent Office
Prior art keywords
fuel
air
evaporator
air supply
injection device
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
EP95942026A
Other languages
German (de)
English (en)
Other versions
EP0770175A1 (fr
Inventor
Jörg Lange
Herbert Gladigow
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 EP0770175A1 publication Critical patent/EP0770175A1/fr
Application granted granted Critical
Publication of EP0770175B1 publication Critical patent/EP0770175B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
    • 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 fuel injection device for an internal combustion engine according to the preamble of the claim 1.
  • Another fuel injection device is known from DE 28 43 534 A1 known with an injection valve, in which at the spray port of the injection valve connecting outlet an electric heating element is arranged to cause vaporization of the fuel sprayed thereon.
  • an electric heating element is arranged to cause vaporization of the fuel sprayed thereon.
  • In the area of the outlet channel between the Injection opening of the injection valve and the heating element opens an air nozzle, taking advantage of the pressure gradient in the intake pipe Air is supplied from the intake pipe, which the Fuel jet from the injection valve is added.
  • the device according to the invention with the characteristic Features of claim 1 has the advantage that through the air supply in the area of the outlet opening of the fuel evaporator a formation from the heated fuel vaporizer escaping steam jet is caused and that when the fuel vaporizer is switched off, i.e. not heated Fuel vaporizer improved atomization of the escaping fuel jet is reached.
  • blow-out opening is like this is designed so that their effective cross section the amount of air to be mixed with the fuel jet.
  • the air supply device can do this with an idle actuator of the corresponding internal combustion engine, so that the total idle air to the fuel jet via the air supply device is added.
  • Air supply is provided to the inlet opening of the fuel evaporator , causing a flushing of the evaporator area and the evaporator structure is reached.
  • Figure 1 shows a fuel injection device for a Internal combustion engine with an injection valve 10, which has a Fuel supply port 11 fuel under pressure can be supplied from a pressure fuel source, not shown and with a connecting section 12 an electrical or electronic, not shown Engine control unit is connectable.
  • a spray hole section 13 of the injection valve 10 is in a cylindrical recess 14 of a housing 15 arranged.
  • a fuel evaporator 16 is spaced from the spray hole section 13 in the spray direction S behind the spray hole section 13 housed in the housing 15, with an inlet opening 17 of the fuel evaporator 16 not shown Spray hole is arranged so opposite, that between the spray hole portion 13 and the inlet opening 17 an outlet space 18 for those injected from the injection valve 10 Fuel is formed in the cylindrical recess 14 is.
  • the fuel vaporizer 16 has between its inlet opening 17 and an outlet opening 19 an evaporation area 20 with an evaporator structure 21 arranged therein, those by means of an electrical one surrounding the evaporation region 20 Heater 22 and / or directly (not shown) heatable is.
  • a heating current supply line, not shown for the heater 22 is via a connecting section 23 on the housing 15 with a corresponding power source connectable.
  • the outlet opening 19 of the fuel evaporator 16 is one Air blowing device 24 of an air supply device 25 surrounded, which is preferably designed as an annular gap nozzle and to which there is an outlet opening 26 in the housing 15 for one in the area of the outlet opening 19 of the fuel evaporator 16 fuel air mixture formed connects.
  • the exit opening 26 has one with respect to the fuel jet direction A circumferentially arranged guide surface 27.
  • Air preferably compressed air
  • Air supply line 28 is provided, which over a suitable Connection piece 29 or the like with a corresponding Compressed air source not shown connectable is.
  • a suitable pump for example, can be used as the compressed air source (not shown) are used, the suction side with the ambient air is connected and its pressure side to the Air supply line 28 is connected. It is preferred however, the air supply line 28 with the intake pipe of the Internal combustion engine in which the fuel injection device according to the invention is used connected that the Fuel in the area of the outlet opening 19 of the fuel evaporator 16 air to be mixed using the pressure gradient is fed into the intake pipe.
  • the air supply line 28 is to connect to the outlet side of an idle control device, so that the total idle air in the idle mode from the fuel evaporator 16 emerging fuel mixed becomes.
  • the annular gap nozzle 24 is to be designed that it does not determine the amount of air to be mixed, since the metering of the idle air to regulate the idle operation of the internal combustion engine from the idle actuator becomes.
  • the air blowing device 24 also a variety of with respect to the fuel jet direction
  • a star-shaped nozzles 30 may be provided, which expediently evenly distributed in the circumferential direction are arranged.
  • the individual nozzles 30 are one Annular duct 31 connected to the air supply line 28.
  • the two illustrated embodiments of the air blowing device are other suitable training, z. B. sector-shaped arranged slots possible.
  • the fuel injection device operated so that the fuel evaporator is electrically heated is so that its evaporator structure 21 heats up.
  • the injected into the evaporation region 20 by the injection valve 10 Fuel in contact with the evaporator structure 21 comes, is thus evaporated, so that from the fuel evaporator 16 a corresponding fuel vapor jet exit.
  • This fuel vapor jet is created by the Air blowing device, that is from the annular gap nozzle 24 or air blown out of the individual nozzles 30 and shaped with this mixed. This allows the mixture formation for improve the internal combustion engine.
  • a second air supply line 32 is provided, which also has a connecting piece 33 with a Air source is connectable.
  • the air supply line 32 opens into the outlet space 18, which is between the spray hole section 13 of the injection valve 10 and the inlet opening 17th of the fuel evaporator 16 opens.

Landscapes

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

Claims (10)

  1. Dispositif d'injection de carburant pour un moteur à combustion interne équipé d'un injecteur (10) et d'un évaporateur de carburant (16) dont l'orifice d'entrée (17) reçoit du carburant éjecté par l'injecteur (10), son orifice de sortie (19) fournissant un jet de carburant, ainsi que d'une installation d'alimentation en air (25) fournissant l'air à mélanger au jet de carburant dans l'évaporateur de carburant (16),
    caractérisé en ce que
    l'installation d'alimentation en air (25) comporte une installation de soufflage d'air (24, 24') prévue au niveau de l'orifice de sortie (19) de l'évaporateur de carburant (16),
    l'installation fournit l'air à mélanger au jet de carburant sortant de l'évaporateur de carburant (16) et,
    l'évaporateur de carburant (16), et l'installation de soufflage d'air (24, 24') et au moins en partie l'installation d'alimentation en air (25) sont reliées solidairement à l'injecteur (10).
  2. Dispositif d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    l'installation de soufflage d'air est réalisée comme une buse (24, 24') débouchant derrière l'orifice de sortie (19) de l'évaporateur de carburant (16) selon le sens d'écoulement (A) du jet de carburant, pour arriver dans le jet de carburant.
  3. Dispositif d'injection de carburant selon la revendication 2,
    caractérisé en ce que
    la direction de soufflage de la buse (24, 24') est essentiellement radiale par rapport à la direction (A) du jet de carburant.
  4. Dispositif d'injection selon la revendication 2 ou 3,
    caractérisé en ce que
    l'installation de soufflage d'air est en forme de buse à intervalle annulaire (24).
  5. Dispositif d'injection selon la revendication 2 ou 3,
    caractérisé en ce que
    l'installation de soufflage d'air est réalisée sous forme de buse (24') avec plusieurs perçages de buse (30).
  6. Dispositif d'injection selon l'une des revendications 2, 3, 4,
    caractérisé en ce que
    la buse (24, 24') présente une section prédéterminée qui définit la quantité d'air à mélanger au jet de carburant.
  7. Dispositif d'injection selon l'une quelconque des revendications précédentes,
    caractérisé en'ce que
    l'installation d'alimentation en air (25) comporte une autre installation de soufflage d'air au niveau de l'orifice d'entrée (17) de l'évaporateur de carburant (16)
  8. Dispositif d'injection selon l'une des revendications précédentes,
    caractérisé en ce que
    l'installation d'alimentation en air (25) comporte une conduite d'alimentation en air (29, 32) reliée à la tubulure d'aspiration du moteur à combustion interne.
  9. Dispositif d'injection selon l'une des revendications précédentes,
    caractérisé en ce que
    la conduite d'alimentation en air (28, 32) de l'installation d'alimentation en air (25) est reliée à la tubulure d'aspiration du moteur à combustion par une installation de réglage de ralenti.
  10. Dispositif d'injection selon l'une des revendications précédentes,
    caractérisé en ce que
    l'installation d'alimentation en air (25) comporte une conduite d'alimentation en air (28, 32) dont le côté d'entrée est relié à une pompe à air comprimé.
EP95942026A 1994-12-23 1995-12-20 Dispositif d'injection de carburant destine a un moteur a combustion interne Expired - Lifetime EP0770175B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4446242 1994-12-23
DE4446242A DE4446242A1 (de) 1994-12-23 1994-12-23 Kraftstoffeinspritzvorrichtung für einen Verbrennungsmotor
PCT/DE1995/001826 WO1996020342A1 (fr) 1994-12-23 1995-12-20 Dispositif d'injection de carburant destine a un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0770175A1 EP0770175A1 (fr) 1997-05-02
EP0770175B1 true EP0770175B1 (fr) 2000-03-22

Family

ID=6536879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95942026A Expired - Lifetime EP0770175B1 (fr) 1994-12-23 1995-12-20 Dispositif d'injection de carburant destine a un moteur a combustion interne

Country Status (7)

Country Link
US (1) US5694906A (fr)
EP (1) EP0770175B1 (fr)
JP (1) JPH09509719A (fr)
KR (1) KR970701307A (fr)
CN (1) CN1070263C (fr)
DE (2) DE4446242A1 (fr)
WO (1) WO1996020342A1 (fr)

Families Citing this family (23)

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DE19542317A1 (de) * 1995-11-14 1997-05-15 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für einen Verbrennungsmotor
US6276347B1 (en) * 1998-09-25 2001-08-21 Micro Coating Technologies, Inc. Systems and methods for delivering atomized fluids
US6237575B1 (en) 1999-04-08 2001-05-29 Engelhard Corporation Dynamic infrared sensor for automotive pre-vaporized fueling control
CA2293134A1 (fr) * 1999-12-24 2001-06-24 Mobile Climate Control Inc. Dispositif de demarrage a froid pour moteur thermique, et methode de mise en marche sequentielle dudit dispositif
DE10115442B4 (de) * 2000-03-29 2006-04-20 Hitachi, Ltd. Vorrichtung zum Zuführen von Kraftstoff für eine Brennkraftmaschine und Brennkraftmaschine mit dieser Vorrichtung
US6484700B1 (en) 2000-08-24 2002-11-26 Synerject, Llc Air assist fuel injectors
US6402057B1 (en) 2000-08-24 2002-06-11 Synerject, Llc Air assist fuel injectors and method of assembling air assist fuel injectors
US6302337B1 (en) 2000-08-24 2001-10-16 Synerject, Llc Sealing arrangement for air assist fuel injectors
CN1526053A (zh) * 2001-06-01 2004-09-01 燃料输送系统
US6889671B2 (en) * 2001-06-01 2005-05-10 Vaporate Pty Ltd Fuel delivery system
US7104477B2 (en) 2001-09-13 2006-09-12 Synerject, Llc Air assist fuel injector guide assembly
US6843238B2 (en) * 2002-03-08 2005-01-18 Hitachi, Ltd. Cold start fuel control system
US6779513B2 (en) * 2002-03-22 2004-08-24 Chrysalis Technologies Incorporated Fuel injector for an internal combustion engine
US6871792B2 (en) * 2002-03-22 2005-03-29 Chrysalis Technologies Incorporated Apparatus and method for preparing and delivering fuel
US20080230039A1 (en) * 2007-03-22 2008-09-25 Weiss Amanda M Continuous liquid fuel vaporizer
FR2916809A3 (fr) * 2007-05-31 2008-12-05 Renault Sas Dispositif d'admission de demarrage a froid pour un moteur thermique de vehicule automobile
JP2010048249A (ja) * 2008-07-22 2010-03-04 Yamaha Motor Co Ltd エンジン、区画部材及び区画部材の製造方法
WO2011028284A1 (fr) * 2009-09-01 2011-03-10 Ecomotors Inc. Chambre de combustion de combustible n'émettant pas de suie
WO2011028283A1 (fr) * 2009-09-01 2011-03-10 Ecomotors Inc Injecteur de carburant permettant une combustion efficace
US8511287B2 (en) * 2009-09-08 2013-08-20 EcoMotors International Supercritical-state fuel injection system and method
CN106870219B (zh) * 2017-02-20 2019-05-31 武汉维思艾克软件有限公司 燃料喷射装置以及方法
CN107654317A (zh) * 2017-11-09 2018-02-02 赵明 一种发动机燃油汽化方法及其装置
KR102013221B1 (ko) * 2019-07-08 2019-08-22 이석영 기화기

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DE3315241A1 (de) * 1983-04-27 1984-10-31 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum einspritzen von kraftstoff in eine sekundaere stroemung von verbrennungsluft einer brennkammer
DE3327773A1 (de) * 1983-05-13 1984-11-15 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur kraftstoffeinspritzung in brennraeume
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US4676216A (en) * 1984-10-05 1987-06-30 Kabushiki Kaisha Toyota Chuo Kenkyusho Injection nozzle
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Also Published As

Publication number Publication date
CN1138888A (zh) 1996-12-25
DE4446242A1 (de) 1996-06-27
DE59508068D1 (de) 2000-04-27
US5694906A (en) 1997-12-09
CN1070263C (zh) 2001-08-29
WO1996020342A1 (fr) 1996-07-04
JPH09509719A (ja) 1997-09-30
KR970701307A (ko) 1997-03-17
EP0770175A1 (fr) 1997-05-02

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