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EP0543704A1 - Verfahren und Vorrichtung zur Verbesserung der Kraftstoffverdampfung in Verbrennungsmotoren - Google Patents

Verfahren und Vorrichtung zur Verbesserung der Kraftstoffverdampfung in Verbrennungsmotoren Download PDF

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Publication number
EP0543704A1
EP0543704A1 EP92403040A EP92403040A EP0543704A1 EP 0543704 A1 EP0543704 A1 EP 0543704A1 EP 92403040 A EP92403040 A EP 92403040A EP 92403040 A EP92403040 A EP 92403040A EP 0543704 A1 EP0543704 A1 EP 0543704A1
Authority
EP
European Patent Office
Prior art keywords
fuel
auxiliary
intake
auxiliary duct
pipe
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
EP92403040A
Other languages
English (en)
French (fr)
Other versions
EP0543704B1 (de
Inventor
Bertrand Gatellier
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.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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 IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Publication of EP0543704A1 publication Critical patent/EP0543704A1/de
Application granted granted Critical
Publication of EP0543704B1 publication Critical patent/EP0543704B1/de
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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/20—Feeding recirculated exhaust gases directly into the combustion chambers or into the intake runners
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/36—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for adding fluids other than exhaust gas to the recirculation passage; with reformers

Definitions

  • the present invention relates to a method and a device for improving the efficiency of an internal combustion engine and controlled ignition by promoting the vaporization of fuel during the intake phases.
  • the main objective of the improvement sought is to reduce the harmful components in the exhaust gases of the cylinders and in particular nitrogen oxides, as well as unburnt hydrocarbons.
  • each combustion chamber is connected in a controlled manner with the intake pipe or the exhaust pipe by an auxiliary duct opening into one or the other in the immediate vicinity of the intake valve or exhaust.
  • an auxiliary duct opening into one or the other in the immediate vicinity of the intake valve or exhaust According to a mode in communication with the combustion chamber can be established by opening the auxiliary duct therein by interposing an auxiliary valve and / or a control valve.
  • the auxiliary duct communicates the intake pipe and the exhaust pipe in the immediate vicinity of their respective valves, the communication being controlled by a valve or a plug interposed on this auxiliary duct.
  • This direct communication between the two pipes allows a better dosage of the fraction of burned gases reinjected which is the richest in harmful discharges.
  • the method according to the invention essentially aims to promote the vaporization of fuel in an internal combustion engine with positive ignition comprising at least one cylinder associated with a fuel mixture intake pipe, an exhaust pipe and an auxiliary duct. associated with control means, allowing to carry out during the admission phases, a controlled recycling of a fraction of burnt gases.
  • It is characterized in that it comprises an injection of fuel into a flow of burnt gases readmitted at each cycle via said auxiliary duct, so as to take advantage of their high temperature to facilitate vaporization of the fuel.
  • Fuel is injected, for example, into the flow of burnt gas intermittently escaping from each cylinder in the auxiliary duct when an auxiliary control valve is opened.
  • a multi-point injection is carried out, the fuel being injected into each intake pipe of the engine, in a flow of burnt gases coming from an auxiliary duct. corresponding.
  • fuel can be injected into the flow of burnt gas from a common exhaust manifold with several cylinders, connected to each intake pipe by a specific auxiliary duct.
  • said fuel injection is carried out sequentially during the closing time of each intake valve.
  • the essential idea of the invention is to take advantage of the high temperature of the recycled burnt gases to better vaporize the fuel. This being injected in a time interval where a stream of recycled hot burnt gases from a specific auxiliary duct or not, circulates towards the combustion chambers, a much better vaporization is obtained than in the conventional case where the injection takes place in a stream of fresh air in a mixture comprising mainly fresh air and a relatively small portion of recycled burnt gases. The combustion and the engine efficiency are therefore significantly improved.
  • the invention also relates to an implementation device for promoting the vaporization of fuel in an internal combustion engine comprising at least one cylinder associated with a fuel mixture intake pipe, an exhaust pipe and an auxiliary duct associated with control means, making it possible to carry out, during the intake phases, a controlled recycling of a fraction of burnt gases.
  • This device is characterized in that it includes fuel injection means arranged so that the injected fuel is in contact with the burnt gases recycled through the auxiliary conduit.
  • the device comprises for example multi-point injection means, auxiliary conduits associated respectively with each cylinder, each of the conduits towards its end communicating with the corresponding intake pipe, being curved so that the flow of recycled gas is directed towards the intake valve, the injection means being arranged substantially at said end of each auxiliary duct.
  • each auxiliary duct is arranged to establish communication between an intake pipe and an exhaust manifold for one or more cylinders.
  • each auxiliary duct is arranged for example to establish communication between an intake pipe and the interior of a cylinder via a control valve.
  • the device comprises for example single-point injection means and the auxiliary duct is arranged to establish communication between an exhaust manifold for one or more cylinders and a manifold intake for one or more cylinders.
  • Fig.1 and 2 an application of the device to an engine comprising at least one cylinder 1 in which slides a piston 2, which communicates by a valve 3 with an exhaust pipe 4.
  • the cylinder also communicates by intermediate an intake valve 5 with cyclic opening with an intake pipe 6.
  • the two valves 3 and 5 are associated with control means of a known type not shown, such as cam lifters for example.
  • an auxiliary conduit 7 communicates each intake pipe to the corresponding exhaust pipe.
  • a control means such as a plug 8 is interposed on the auxiliary conduit 7 for the establishment at each cycle of an intermittent communication between the two pipes 4 and 6, as described in the aforementioned European patent application , in order to recycle a determined fraction of the gases burned during the previous cycle.
  • an injector 9 in the connection area of the auxiliary duct 7 with the intake pipe 6.
  • the nose of the injector 9 is preferably placed at the same level as the intersection between the duct 7 and the pipe 6 and the fuel injection is synchronized with an opening of the plug 8 so that the fuel is injected into the flow of hot burnt gases leaving the auxiliary duct 7.
  • the latter is advantageously curved so that the flow of burnt gases entrains the vaporized fuel towards the intake valve 5.
  • the auxiliary duct 7 communicates the combustion chamber 1 with the intake pipe, the recycling of burnt gases being controlled by an auxiliary valve 10 whose lifting time interval LR , (Fig.3) is intermediate between the LE and admission LA time intervals, as described in the aforementioned European patent application.
  • this window LR can be moved more or less between two offset positions LR1 and LR2 to either of the LE and LA intake and exhaust time intervals.
  • a control valve 8 can also be interposed on the auxiliary duct for metering the fraction of recycled burnt gas, in which the fuel is vaporized by means of the injector 9.
  • the method according to the invention is implemented in the context of an injection of the typemono-point.
  • the burnt gases helping to improve vaporization of the fuel are taken from the exhaust manifold 11 of an engine M.
  • an auxiliary duct 12 provided with a controlled communication means 13 such as a plug or a valve, they are introduced into the intake manifold 14.
  • an injector 9 is disposed in the vicinity of the branch between the intake manifold 14 and the conduit 12, so that the fuel is injected into the flow of burnt gases recycled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Exhaust Gas After Treatment (AREA)
EP92403040A 1991-11-18 1992-11-10 Verfahren zur Verbesserung der Kraftstoffverdampfung in Verbrennungsmotoren und Motor zur Durchführung dieses Verfahrens Expired - Lifetime EP0543704B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9114170A FR2683862B1 (fr) 1991-11-18 1991-11-18 Procede et dispositif pour favoriser la vaporisation de carburant dans un moteur a combustion interne.
FR9114170 1991-11-18

Publications (2)

Publication Number Publication Date
EP0543704A1 true EP0543704A1 (de) 1993-05-26
EP0543704B1 EP0543704B1 (de) 1997-03-19

Family

ID=9419040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92403040A Expired - Lifetime EP0543704B1 (de) 1991-11-18 1992-11-10 Verfahren zur Verbesserung der Kraftstoffverdampfung in Verbrennungsmotoren und Motor zur Durchführung dieses Verfahrens

Country Status (5)

Country Link
US (1) US5351668A (de)
EP (1) EP0543704B1 (de)
JP (1) JPH05312108A (de)
DE (1) DE69218342T2 (de)
FR (1) FR2683862B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0701048A1 (de) 1994-09-10 1996-03-13 Ford Motor Company Limited Zylinderkopf
FR2734869A1 (fr) * 1995-06-02 1996-12-06 Renault Dispositif d'alimentation en gaz additionnels pour moteur a combustion interne
EP1887211A1 (de) * 2006-08-08 2008-02-13 DEUTZ Aktiengesellschaft Kombination einer inneren mit einer äusseren Abgasrückführung

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19531875C1 (de) * 1995-08-30 1996-09-19 Daimler Benz Ag Zylinderkopf für eine flüssigkeitsgekühlte, mehrzylindrische Brennkraftmaschine
DE19621530C1 (de) * 1996-05-29 1997-06-05 Daimler Benz Ag Verfahren zur Verminderung der Schadstoffemission einer mehrzylindrigen Brennkraftmaschine
US6079379A (en) 1998-04-23 2000-06-27 Design & Manufacturing Solutions, Inc. Pneumatically controlled compressed air assisted fuel injection system
US6273037B1 (en) 1998-08-21 2001-08-14 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system
US6293235B1 (en) 1998-08-21 2001-09-25 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system with variable effective reflection length
US6102014A (en) * 1998-09-29 2000-08-15 Caterpillar Inc. Exhaust gas recirculation system
DE10009180C2 (de) * 2000-02-26 2002-04-25 Daimler Chrysler Ag Verfahren zur Erzeugung eines homogenen Gemischs für selbstzündende Brennkraftmaschinen und zur Steuerung des Verbrennungsprozesses
CN1526053A (zh) * 2001-06-01 2004-09-01 燃料输送系统
AUPR854501A0 (en) * 2001-10-30 2001-11-29 Casey, Alan Patrick Method and means for injecting fuel
KR100476195B1 (ko) * 2001-12-18 2005-03-16 현대자동차주식회사 내연기관의 배기가스 재순환 시스템
US6868842B2 (en) * 2002-06-28 2005-03-22 Caterpillar Inc. Cylinder head of engine having recirculation chamber
US6769393B2 (en) * 2002-11-19 2004-08-03 Caterpillar Inc Valve system for internal combustion engine
US6758195B1 (en) * 2002-11-26 2004-07-06 Daimlerchrysler Corporation System and method for fast exhaust gas recirculation in a combustion chamber
KR100774328B1 (ko) * 2006-08-10 2007-11-08 현대자동차주식회사 배기가스 재순환 시스템
US7650866B2 (en) * 2006-11-17 2010-01-26 Gm Global Technology Operations, Inc. Light load air delivery system for an internal combustion engine
JP4811363B2 (ja) * 2007-06-27 2011-11-09 トヨタ自動車株式会社 内燃機関の制御装置
US7725159B2 (en) * 2007-09-21 2010-05-25 Hitach Medical Systems America, Inc. Horizontal field MRI shoulder coil
US7545144B2 (en) * 2007-11-14 2009-06-09 Hitachi Medical Systems America, Inc. Vertical field MRI shoulder coil
EP2065586A1 (de) * 2007-11-29 2009-06-03 Perkins Engines Company Limited Verbesserte Belüftung für einen Verbrennungsmotor
NO344301B1 (no) * 2018-09-20 2019-10-28 Bergen Engines As Et gasstilførselssystem for en gassmotor
CN112267959A (zh) * 2020-10-20 2021-01-26 天津大学 Egr气体辅助航空煤油喷射系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4271801A (en) * 1977-10-12 1981-06-09 Toyota Jidosha Kogyo Kabushiki Kaisha Internal combustion engine with twin intake ports for each cylinder
GB2073320A (en) * 1980-03-26 1981-10-14 Bosch Gmbh Robert Exhaust gas recirculation in an internal combustion engine
WO1989000241A1 (en) * 1987-07-03 1989-01-12 Robert Bosch Gmbh Internal combustion engine, in particular otto engine with exhaust return system
DE4009923A1 (de) * 1990-03-28 1991-10-02 Fev Motorentech Gmbh & Co Kg Ventil zum dosieren des abgasrueckfuehrstromes bei brennkraftmaschinen
EP0459374A1 (de) * 1990-06-01 1991-12-04 Mazda Motor Corporation Ansauganlage für einen Motor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416503A (en) * 1967-10-27 1968-12-17 Carl F. High Engine fume discharge reduction systems
US3498274A (en) * 1968-04-29 1970-03-03 Garrett Corp Fuel injector for internal combustion engines
DE2137030A1 (de) * 1971-07-23 1973-02-01 Werner Dipl Phys Kraus Kraftstoffeinspritzvorrichtung
JPS54141924A (en) * 1978-04-25 1979-11-05 Aisan Ind Co Ltd Exhaust gas recycling device
DE2936426A1 (de) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
JPS57203859A (en) * 1981-06-09 1982-12-14 Nippon Denso Co Ltd Fuel atomization control device for internal-combustion engine
JPS61112773A (ja) * 1984-11-07 1986-05-30 Mazda Motor Corp 燃料噴射装置付エンジン

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4271801A (en) * 1977-10-12 1981-06-09 Toyota Jidosha Kogyo Kabushiki Kaisha Internal combustion engine with twin intake ports for each cylinder
GB2073320A (en) * 1980-03-26 1981-10-14 Bosch Gmbh Robert Exhaust gas recirculation in an internal combustion engine
WO1989000241A1 (en) * 1987-07-03 1989-01-12 Robert Bosch Gmbh Internal combustion engine, in particular otto engine with exhaust return system
DE4009923A1 (de) * 1990-03-28 1991-10-02 Fev Motorentech Gmbh & Co Kg Ventil zum dosieren des abgasrueckfuehrstromes bei brennkraftmaschinen
EP0459374A1 (de) * 1990-06-01 1991-12-04 Mazda Motor Corporation Ansauganlage für einen Motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 299 (M-524)(2355) 11 Octobre 1986 & JP-A-61 112 773 ( MAZDA ) 30 Mai 1986 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0701048A1 (de) 1994-09-10 1996-03-13 Ford Motor Company Limited Zylinderkopf
GB2292975A (en) * 1994-09-10 1996-03-13 Ford Motor Co I.c. engine cylinder head exhaust recirculation
EP0701048B1 (de) * 1994-09-10 1998-12-16 Ford Motor Company Limited Zylinderkopf
FR2734869A1 (fr) * 1995-06-02 1996-12-06 Renault Dispositif d'alimentation en gaz additionnels pour moteur a combustion interne
EP1887211A1 (de) * 2006-08-08 2008-02-13 DEUTZ Aktiengesellschaft Kombination einer inneren mit einer äusseren Abgasrückführung

Also Published As

Publication number Publication date
US5351668A (en) 1994-10-04
FR2683862A1 (fr) 1993-05-21
JPH05312108A (ja) 1993-11-22
DE69218342D1 (de) 1997-04-24
EP0543704B1 (de) 1997-03-19
DE69218342T2 (de) 1997-06-26
FR2683862B1 (fr) 1995-05-24

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