EP0770175A1 - 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

Info

Publication number
EP0770175A1
EP0770175A1 EP95942026A EP95942026A EP0770175A1 EP 0770175 A1 EP0770175 A1 EP 0770175A1 EP 95942026 A EP95942026 A EP 95942026A EP 95942026 A EP95942026 A EP 95942026A EP 0770175 A1 EP0770175 A1 EP 0770175A1
Authority
EP
European Patent Office
Prior art keywords
fuel
air
air supply
evaporator
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
EP95942026A
Other languages
German (de)
English (en)
Other versions
EP0770175B1 (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
Ulev GmbH
Texas Instruments Holland BV
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, Ulev GmbH, Texas Instruments Holland BV 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

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
    • 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 claim 1.
  • a fuel injection device with an injection valve and a fuel evaporator connected to it is already known from SAE article 390710, "Cold start Performance of an automotive engine using prevaporized gasoline".
  • the fuel vaporizer consists of an electrically heated tube into which the fuel is injected from the injection valve.
  • three compressed air nozzles are arranged in the connection area between the fuel evaporator and the injection valve, one of which one blows the air radially to the fuel to deflect the fuel jet, and the other two blow the air tangentially to cause the deflected fuel jet to rotate so that the fuel jet travels substantially helically through the electrically heated evaporator tube.
  • a further fuel injection device with an injection valve in which an electrical heating element is arranged in the outlet duct adjoining the injection opening of the injection valve in order to cause the fuel sprayed thereon to evaporate.
  • An air nozzle opens into the area of the outlet duct between the injection opening of the injection valve and the heating element, which air is used to take advantage of the pressure drop in the intake pipe and is mixed with the fuel jet from the injection valve.
  • the device according to the invention with the characterizing features of claim 1 has the advantage that the air supply in the area of the outlet opening of the fuel evaporator causes a formation of the steam jet emerging from the heated fuel evaporator and that when the fuel evaporator is switched off, that is, the fuel evaporator is not heated, an improved atomization of the escaping fuel jet is reached.
  • annular gap nozzles and nozzles with a plurality of nozzle openings arranged around the outlet opening of the fuel evaporator are particularly suitable, through which air can be blown essentially radially into a fuel jet emerging from the fuel evaporator. Due to the suction effect provided according to the invention, fuel deposits on its inner walls and its evaporator structure can be avoided, particularly in the case of a non-heated fuel evaporator.
  • blow-out opening is designed in such a way that its effective cross section determines the amount of air to be mixed with the fuel jet.
  • the air supply device with an idle actuator of the corresponding internal combustion engine, so that all of the idle air is mixed into the fuel jet via the air supply device.
  • FIG. 1 is a partially sectioned, schematic view of a fuel injection device according to the invention
  • Fig. 2 shows a section substantially along line II-II in Figure 1 in another embodiment of the invention.
  • Fig. 3 shows a schematic section through a fuel evaporator according to a further embodiment of the invention. Corresponding components are provided with the same reference numerals in the various figures of the drawing.
  • FIG. 1 shows a fuel injection device for an internal combustion engine with an injection valve 10, to which fuel under pressure can be supplied from a pressurized fuel source (not shown) via a fuel supply connection 11 and which can be connected via a connecting section 12 to an electrical or electronic engine control unit (not shown).
  • a spray hole section 13 of the injection valve 10 is arranged in a cylindrical recess 14 of a housing 15.
  • a fuel evaporator 16 is located at a distance from the spray hole section 13 in the spray direction S behind the spray hole section 13 in the housing 15, an inlet opening 17 of the fuel evaporator 16 being arranged opposite the spray hole (not shown in any more detail) such that an outlet space is located between the spray hole section 13 and the inlet opening 17 18 for fuel ejected from the injection valve 10 is formed in the cylindrical recess 14.
  • the fuel vaporizer 16 has between its inlet opening 17 and an outlet opening 19 an evaporation region 20 with an evaporator structure 21 arranged therein, which can be heated by means of an electrical heater 22 surrounding the evaporation region 20 and / or directly (not shown).
  • a heating current supply, not shown Line for the heater 22 can be connected to a corresponding power source via a connecting section 23 on the housing 15.
  • the outlet opening 19 of the fuel evaporator 16 is surrounded by an air blow-out device 24 of an air supply device 25, which is preferably designed as an annular gap nozzle and to which there is an outlet opening 26 in the housing 15 for a fuel-air mixture formed in the area of the outlet opening 19 of the fuel evaporator 16.
  • the outlet opening 26 has a guide surface 27 arranged circumferentially with respect to the fuel jet direction A.
  • an air supply line 28 is provided in the housing 15, which can be connected to a corresponding compressed air source, not shown, via a suitable connecting piece 29 or the like.
  • a suitable pump (not shown) can be used as the compressed air source, the suction side of which is connected to the ambient air and the pressure side of which is connected to the air supply line 28.
  • the air supply line 28 is preferably connected to the intake pipe of the internal combustion engine, in which the fuel injection device according to the invention is used, in such a way that the air to be mixed with the fuel in the region of the outlet opening 19 of the fuel vaporizer 16 is supplied using the pressure gradient in the intake pipe.
  • the air supply line 28 it is in particular possible to connect the air supply line 28 to the outlet side of an idle control device the, so that in idle mode, all of the idle air is mixed with the fuel emerging from the fuel evaporator 16.
  • the annular gap nozzle 24 is to be designed such that it does not determine the amount of air to be mixed in, since the metering of the idle air for regulating the idle operation of the internal combustion engine is carried out by the idle actuator.
  • the air blow-out device 24 ' can also be provided with a plurality of nozzles 30 arranged in a star shape in relation to the fuel jet direction A, which are expediently arranged evenly distributed in the circumferential direction.
  • the individual nozzles 30 are connected to the air supply line 28 via an annular channel 31.
  • other suitable designs for. E. Sections arranged in sectors possible.
  • the fuel injection device Immediately after an internal combustion engine is started, the fuel injection device according to the invention is operated in such a way that the fuel evaporator is electrically heated so that its evaporator structure 21 heats up.
  • the fuel injected into the evaporation region 20 by the injection valve 10 and which comes into contact with the evaporator structure 21 is thus evaporated, so that a corresponding fuel vapor jet emerges from the fuel evaporator 16.
  • This fuel vapor jet is shaped by the air blown out of the air blow-out device, that is to say from the annular gap nozzle 24 or the individual nozzles 30, and mixed with it.
  • the mixture formation for the internal combustion engine can be improved.
  • a second air supply line 32 is provided in an embodiment of the invention shown in FIG Connection piece 33 is also connectable to an air source.
  • the air supply line 32 opens into the outlet space 18, which opens between the spray hole section 13 of the injection valve 10 and the inlet opening 17 of the fuel vaporizer 16.
  • the air fed into the outlet space 18 through the second air supply line 32 is conducted through the evaporation region 20 of the fuel evaporator 16 together with the fuel sprayed out of the injection valve 10.
  • the heater 22 of the fuel vaporizer 16 is switched off, this air causes fuel droplets which may be deposited on the vaporizer structure 21 to be carried along again, so that the fuel vaporizer is flushed by this additional air.

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

L'invention concerne un dispositif d'injection de carburant destiné à un moteur à combustion interne. Ce dispositif comprend une soupape d'injection (10) et un vaporisateur de carburant (16). Le carburant peut être injecté dans l'orifice d'admission du vaporisateur, par la soupape d'injection (10), et un jet de carburant sort de l'orifice d'évacuation (19) du vaporisateur. Ce dispositif comprend en outre un système d'amenée d'air (25) qui fournit au jet de carburant l'air de mélange destiné au vaporisateur de carburant (16). L'invention vise à améliorer le débit de carburant du vaporisateur (16). A cet effet, le système d'amenée d'air (25) présente un dispositif de soufflage d'air (24, 24') disposé au niveau de l'orifice d'évacuation (19). L'air de mélange est acheminé vers le jet de carburant sortant du vaporisateur (16), à travers ce dispositif de soufflage d'air.
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 true EP0770175A1 (fr) 1997-05-02
EP0770175B1 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)

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Publication number Priority date Publication date Assignee Title
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
US6508236B2 (en) * 2000-03-29 2003-01-21 Hitachi, Ltd. Fuel supply device and internal combustion engine mounting the same
US6302337B1 (en) 2000-08-24 2001-10-16 Synerject, Llc Sealing arrangement for 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
US6484700B1 (en) 2000-08-24 2002-11-26 Synerject, Llc Air assist fuel injectors
MXPA03010818A (es) * 2001-06-01 2004-11-22 Vaporate Pty Ltd Sistema de suministro de combustible.
CN1526053A (zh) * 2001-06-01 2004-09-01 燃料输送系统
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
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
US20110068188A1 (en) * 2009-09-01 2011-03-24 Laimboeck Franz J Fuel injector for permitting efficient combustion
US20110067671A1 (en) * 2009-09-01 2011-03-24 Laimboeck Franz J Non-soot emitting fuel combustion chamber
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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US2965164A (en) * 1957-10-22 1960-12-20 Cav Ltd Liquid fuel torches
JPS5453714A (en) * 1977-10-06 1979-04-27 Toyota Motor Corp Internal combustion engine fuel injector
JPS6056908B2 (ja) * 1978-11-06 1985-12-12 株式会社日立製作所 燃料噴射装置のための燃料制御装置
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
DE3414201A1 (de) * 1984-04-14 1985-10-17 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum einspritzen von kraftstoff in brennraeumen
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See references of WO9620342A1 *

Also Published As

Publication number Publication date
CN1070263C (zh) 2001-08-29
DE4446242A1 (de) 1996-06-27
KR970701307A (ko) 1997-03-17
JPH09509719A (ja) 1997-09-30
DE59508068D1 (de) 2000-04-27
WO1996020342A1 (fr) 1996-07-04
US5694906A (en) 1997-12-09
CN1138888A (zh) 1996-12-25
EP0770175B1 (fr) 2000-03-22

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