EP1548269B1 - Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé - Google Patents

Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé Download PDF

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Publication number
EP1548269B1
EP1548269B1 EP04106791A EP04106791A EP1548269B1 EP 1548269 B1 EP1548269 B1 EP 1548269B1 EP 04106791 A EP04106791 A EP 04106791A EP 04106791 A EP04106791 A EP 04106791A EP 1548269 B1 EP1548269 B1 EP 1548269B1
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European Patent Office
Prior art keywords
engine
line
cooler
exhaust
exhaust gases
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EP04106791A
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German (de)
English (en)
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EP1548269A1 (fr
Inventor
Harald Fessler
Giancarlo Dellora
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Iveco SpA
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Iveco SpA
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02EGR systems specially adapted for supercharged engines
    • F02M26/04EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02EGR systems specially adapted for supercharged engines
    • F02M26/09Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23Layout, e.g. schematics
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04Cooling of air intake supply
    • F02B29/0406Layout of the intake air cooling or coolant circuit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32Liquid-cooled heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/42Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • F02M26/44Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which a main EGR passage is branched into multiple passages

Definitions

  • the present invention relates to a method for recirculating the exhaust gases in a turbocharged diesel engine apparatus for use in an industrial vehicle and an engine apparatus comprising a diesel engine.
  • Exhaust gas recirculation is common practice in the field of internal combustion engines, especially in diesel engines.
  • EGR exhaust gas recirculation
  • a portion of the exhaust gases from the engine are recirculated upstream of the engine and reintroduced into the combustion chambers with the intake air. This permits to lower the combustion temperature and leads to a reduced formation of nitrogen oxides, one of the main pollutants in internal combustion engine emissions.
  • US 4 055 158 describes a spark ignited engine where exhaust gas is recirculated, and recirculated gases are cooled, and a condensate trap is foreseen after the cooler.
  • US 6 301 887 describes an EGR system applied on the low pressure side of compressor and turbine in a turbocharged engine. Condensation and condensate removal are foreseen in an intercooler placed on the intake line after the compressor.
  • US6367256 discloses a method for EGR having the features of the precharacterising portion of claim 1 and discloses an engine with means for EGR.
  • the invention also relates to an engine apparatus comprising a diesel engine, an air intake line to said engine provided with a compressor, an exhaust gas line from said engine provided with a turbine, an exhaust gas recirculation line connects said exhaust line between said engine and said turbine with said intake line between said compressor and said engine and suitable for conveying gas from said exhaust line to said intake line, comprising a cooler on said recirculation line, provided with devices for separating the condensate, said cooler being connected to a circuit for the engine cooling fluid in such a way that the fluid coming from a radiator placed on said circuit can first be supplied to said cooler and then to the engine characterized in that there is provided a particulate trap upstream of said cooling,
  • figure 1 illustrates the layout of an engine apparatus, which may be the engine apparatus of an industrial vehicle according to the invention; the engine apparatus comprises an internal combustion engine 1, generally a diesel engine, an air intake line 2 to the engine, that takes in air from the outside, and the exhaust gas line 3 that may comprise a manifold 4.
  • the engine apparatus comprises an internal combustion engine 1, generally a diesel engine, an air intake line 2 to the engine, that takes in air from the outside, and the exhaust gas line 3 that may comprise a manifold 4.
  • a compression unit 5 comprising the turbocharger compressor 6 on the intake line, driven by the turbine 7 on the exhaust gas line.
  • turbocharged engine there are usually one or more coolers like cooler 9 on the intake line.
  • the recirculation line 8 draws a portion of the exhaust gases coming from the engine (this portion may be for example up to 50% of the total exhaust gases) and reintroduces said portion into the intake line.
  • the exhaust gases may be conveyed spontaneously if the pressure of the exhaust gases leaving the engine 1 is higher than the intake pressure. If this condition is not maintained continuously there is generally a check valve 10 (for example a reed valve), which may also be foreseen in any case. If, as it often happens, the engine intake pressure is higher than the exhaust pressure, or if deemed necessary, in order to increase or control the rate of recirculation, specific circulation means 11, such as a compressor, may be included. Said means may be driven by an electric motor or in any other appropriate manner.
  • a check valve 10 for example a reed valve
  • cooler 12 On the line 8 there is an appropriate type of cooler 12, for example having all the parts that must come into contact with gases and condensate being corrosion-proof; for example, such parts may be coated with an appropriate type of material, such as Teflon.
  • the engine apparatus preferably includes devices for separating the condensate.
  • Said devices may be an integral part of the cooler 12 and of the inertial type.
  • the cooler and separator may be of conventional type.
  • a cooler may be used in which the recirculated gases flow through the shell side and a cooling fluid through the tube side.
  • Condensate separation may be achieved by the loss of speed due to an increased cross-section of the passage, the liquid collecting at the shellbottom.
  • baffles to divert the flow of gas in order to facilitate separation, and the system may comprise a specific separation section before the gas leaves the shell, with baffle or centrifugal separators.
  • the recirculated gas may also flow through the tube side into a specific separation chamber.
  • the gas flowing along the recirculation line is cooled to a temperature at which separation of condensate can be achieved.
  • a temperature at which separation of condensate can be achieved may be less than 95°C and preferably not more than 70°C. Cooling may be effected by transferring the heat to an appropriate fluid; for example, engine cooling water coming from the radiator may be supplied to the cooler 12. According to a possible embodiment of the invention, the water from the radiator is supplied first to the cooler 12 and then to the engine 1, in order to ensure adequate cooling of the recirculated gases.
  • the apparatus comprises an engine cooling circuit comprising a radiator to cool a fluid (preferably water) contained in said circuit and circulating through the cooler 12.
  • the condensate may be discharged from the cooler in an appropriate manner.
  • the condensate flow rate can be controlled by means of an appropriate valve or by using a conventional condensate discharger 14 installed in an appropriate position on the bottom of the cooler or on the exhaust line.
  • the condensate may be discharged at regular intervals or according to the amount of condensate that has been collected.
  • the discharge system may also consist of a simple and appropriately sized orifice.
  • the particulate is preferably removed from the recirculated gas upstream of the cooler, for example by means of a trap 15 on the line 8.
  • the trap 15 is preferably of a type that is capable of withstanding high temperatures, such as a metal trap, for example.
  • the method according to this invention allows to reduce the content of some components (that are usually a product of combustion) which are found in recirculating gases and are potentially harmful for the engine and other parts (for example sulphuric and nitric acid).
  • the low recirculation temperature is advantageous because it enables the temperature inside the combustion chambers to be lowered, which leads to a reduced formation of pollutants (such as nitrogen oxides), and enhances combustion chamber filling efficiency and thus engine performance.

Claims (2)

  1. Procédé pour remettre en circulation les gaz d'échappement jusqu'à un moteur diesel à turbocompresseur comportant une ligne d'admission d'air munie d'un compresseur et une ligne de gaz d'échappement munie d'une turbine, ledit procédé comportant les étapes suivantes consistant à :
    a) extraire une partie des gaz d'échappement provenant du moteur en un point sur la ligne d'échappement situé entre le moteur et la turbine,
    b) refroidir la totalité de ladite partie par transfert de chaleur au fluide de refroidissement du moteur dans un refroidisseur alimenté avec le fluide de refroidissement du moteur de manière à entraîner une condensation, ledit fluide provenant d'un radiateur et étant d'abord acheminé jusqu'audit refroidisseur puis jusqu'au moteur,
    c) séparer le condensat de ladite partie,
    d) réintroduire ladite partie dans le moteur dans la ligne d'admission en un point situé entre le compresseur et le moteur,
    caractérisé en ce que sont prévues l'étape consistant à retirer la matière particulaire de ladite partie de gaz d'échappement avant l'étape b) et en ce que le refroidissement de ladite partie de gaz d'échappement est effectué en dessous de 70°C.
  2. Dispositif moteur comportant un moteur diesel (1), une ligne d'admission d'air (2) jusqu'audit moteur munie d'un compresseur (6), une ligne de gaz d'échappement (3) provenant dudit moteur munie d'une turbine (7), une ligne de recirculation de gaz d'échappement (8) reliant ladite ligne d'échappement entre ledit moteur et ladite turbine à ladite ligne d'admission entre ledit compresseur et ledit moteur et adaptée pour acheminer du gaz provenant de ladite ligne d'échappement jusqu'à ladite ligne d'admission, comportant un refroidisseur (12) sur ladite ligne de recirculation, munie de dispositifs pour séparer le condensat, ledit refroidisseur étant relié à un circuit pour le fluide de refroidissement du moteur de manière à ce que le fluide provenant d'un radiateur placé sur ledit circuit puisse d'abord être acheminé jusqu'au refroidisseur puis jusqu'au moteur, caractérisé en ce qu'un piège à particules (15) est agencé en amont dudit refroidisseur.
EP04106791A 2003-12-22 2004-12-21 Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé Active EP1548269B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20032554 2003-12-22
IT002554A ITMI20032554A1 (it) 2003-12-22 2003-12-22 Metodo di ricircolo dei gas di scarico in impianto motore a combustione interne e impianto motore a combustione interna

Publications (2)

Publication Number Publication Date
EP1548269A1 EP1548269A1 (fr) 2005-06-29
EP1548269B1 true EP1548269B1 (fr) 2009-12-09

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EP04106791A Active EP1548269B1 (fr) 2003-12-22 2004-12-21 Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé

Country Status (5)

Country Link
EP (1) EP1548269B1 (fr)
AT (1) ATE451547T1 (fr)
DE (1) DE602004024494D1 (fr)
ES (1) ES2337464T3 (fr)
IT (1) ITMI20032554A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1825130A1 (fr) * 2004-10-25 2007-08-29 Behr GmbH & Co. KG Condensateur d'un systeme de turbocompresseur et procede d'utilisation d'un tel systeme
DE102005023958A1 (de) * 2005-05-20 2006-11-23 Behr Gmbh & Co. Kg Turboladeranordnung und Verfahren zum Betreiben eines Turboladers
FR2893677B1 (fr) * 2005-11-23 2011-04-29 Renault Sas Dispositif de recirculation des gaz brules et refroidisseur d'air de suralimentation adapte pour un tel dispositif
US8307647B2 (en) 2007-12-20 2012-11-13 Renault Trucks Internal combustion engine arrangement with EGR drain system
US8015809B2 (en) * 2008-02-14 2011-09-13 Dresser, Inc. Recirculation of exhaust gas condensate
EP2161438B1 (fr) 2008-09-03 2015-01-21 Behr GmbH & Co. KG Système de récirculation de gaz d'échappement d'un moteur à combustion interne et procédé de récirculation de gaz d'échappement d'un moteur à combustion interne
US8418461B2 (en) * 2009-10-06 2013-04-16 International Engine Intellectual Property Company, Llc System and method for condensate removal from EGR system
EP2330287B1 (fr) * 2009-12-04 2014-02-26 Caterpillar Motoren GmbH & Co. KG Procédé et système de recirculation des gaz d'échappement
DE102010005784A1 (de) 2010-01-27 2011-07-28 Audi Ag, 85057 Kraftwagen mit einer Abgasanlage
FR2962164B1 (fr) * 2010-06-30 2012-12-07 Valeo Systemes Thermiques Dispositif de recirculation de gaz d'echappement d'un moteur de vehicule automobile
DE102010041982A1 (de) * 2010-10-05 2012-04-05 Mahle International Gmbh Abgasrückführfilter, Brennkraftmaschine
DE102011087256A1 (de) * 2011-11-28 2013-05-29 Behr Gmbh & Co. Kg Brennkraftmaschine mit einer Anordnung zur Rückführung von Abgas und Zuführung von gekühlter Ladeluft
US20160305374A1 (en) * 2015-04-14 2016-10-20 General Electric Company Method and systems for managing condensate

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US6367256B1 (en) * 2001-03-26 2002-04-09 Detroit Diesel Corporation Exhaust gas recirculation with condensation control

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US4055158A (en) 1974-04-08 1977-10-25 Ethyl Corporation Exhaust recirculation
US6003315A (en) * 1997-03-31 1999-12-21 Caterpillar Inc. Exhaust gas recirculation system for an internal combustion engine
US6301888B1 (en) * 1999-07-22 2001-10-16 The United States Of America As Represented By The Administrator Of The Environmental Protection Agency Low emission, diesel-cycle engine
US6301887B1 (en) 2000-05-26 2001-10-16 Engelhard Corporation Low pressure EGR system for diesel engines

Patent Citations (1)

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US6367256B1 (en) * 2001-03-26 2002-04-09 Detroit Diesel Corporation Exhaust gas recirculation with condensation control

Also Published As

Publication number Publication date
ES2337464T3 (es) 2010-04-26
ITMI20032554A1 (it) 2005-06-23
DE602004024494D1 (de) 2010-01-21
ATE451547T1 (de) 2009-12-15
EP1548269A1 (fr) 2005-06-29

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