EP1548269A1 - 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
EP1548269A1
EP1548269A1 EP04106791A EP04106791A EP1548269A1 EP 1548269 A1 EP1548269 A1 EP 1548269A1 EP 04106791 A EP04106791 A EP 04106791A EP 04106791 A EP04106791 A EP 04106791A EP 1548269 A1 EP1548269 A1 EP 1548269A1
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EP
European Patent Office
Prior art keywords
engine
line
exhaust
fact
internal combustion
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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
EP04106791A
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German (de)
English (en)
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EP1548269B1 (fr
Inventor
Harald Fessler
Giancarlo Dellora
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Iveco SpA
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Iveco SpA
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Publication of EP1548269A1 publication Critical patent/EP1548269A1/fr
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Publication of EP1548269B1 publication Critical patent/EP1548269B1/fr
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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
    • 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
    • F02M26/35—Arrangement 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
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High 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
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10—Constructional 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
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F02M26/42—Arrangement 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
    • F02M26/44—Arrangement 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 an engine apparatus, in particular in a turbocharged diesel engine apparatus for use in an industrial vehicle.
  • 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.
  • the method includes the separation of the condensate from said portion of the exhaust gases.
  • the method may also include a step of particulate abatement, more preferably prior to the cooling step.
  • the engine is preferably a turbocharged engine.
  • the invention also relates to an engine apparatus comprising an engine as described above, an air intake line to said engine, an exhaust gas line from said engine, an exhaust gas recirculation line suitable for conveying gas from said exhaust line to said intake line, a cooler, preferably comprising means for discharging the condensate, placed on said recirculation line.
  • 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.
  • said temperature, upstream of the turbine 7 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 radiator 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.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
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 true EP1548269A1 (fr) 2005-06-29
EP1548269B1 EP1548269B1 (fr) 2009-12-09

Family

ID=34531920

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006045488A1 (fr) * 2004-10-25 2006-05-04 Behr Gmbh & Co. Kg Condensateur d'un systeme de turbocompresseur et procede d'utilisation d'un tel systeme
EP1724453A1 (fr) * 2005-05-20 2006-11-22 Behr GmbH & Co. KG Mécanisme de turbocompresseur et procédé d'utilisation de celui-ci
FR2893677A1 (fr) * 2005-11-23 2007-05-25 Renault Sas Dispositif de recirculation des gaz brules et refroidisseur d'air de suralimentation adapte pour un tel dispositif
WO2009081226A1 (fr) * 2007-12-20 2009-07-02 Renault Trucks Agencement de moteur à combustion interne avec système de vidange egr
EP2161438A2 (fr) 2008-09-03 2010-03-10 Behr GmbH & Co. KG Système de récupération de gaz d'échappement d'un moteur à combustion interne et procédé de récupération de gaz d'échappement d'un moteur à combustion interne
US20110079002A1 (en) * 2009-10-06 2011-04-07 International Engine Intellectual Property Company Llc System and method for condensate removal from egr system
WO2011066871A1 (fr) * 2009-12-04 2011-06-09 Caterpillar Motoren Gmbh & Co. Kg Systeme et procede de recirculation des gaz d'echappement
DE102010005784A1 (de) 2010-01-27 2011-07-28 Audi Ag, 85057 Kraftwagen mit einer Abgasanlage
US8015809B2 (en) * 2008-02-14 2011-09-13 Dresser, Inc. Recirculation of exhaust gas condensate
WO2012000811A1 (fr) * 2010-06-30 2012-01-05 Valeo Systemes Thermiques Dispositif de recirculation de gaz d'échappement d'un moteur de véhicule automobile et utilisation d'un tel dispositif
WO2012045673A1 (fr) * 2010-10-05 2012-04-12 Mahle International Gmbh Filtre de recirculation de gaz d'échappement, moteur à combustion interne
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055158A (en) 1974-04-08 1977-10-25 Ethyl Corporation Exhaust recirculation
EP0869275A1 (fr) * 1997-03-31 1998-10-07 Caterpillar Inc. Système de recirculation de gaz d'échappement pour un moteur à combustion interne
US6301887B1 (en) 2000-05-26 2001-10-16 Engelhard Corporation Low pressure EGR system for diesel engines
US20010045090A1 (en) * 1999-07-22 2001-11-29 Gray Charles L. Low emission, diesel-cycle engine
US6367256B1 (en) 2001-03-26 2002-04-09 Detroit Diesel Corporation Exhaust gas recirculation with condensation control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055158A (en) 1974-04-08 1977-10-25 Ethyl Corporation Exhaust recirculation
EP0869275A1 (fr) * 1997-03-31 1998-10-07 Caterpillar Inc. Système de recirculation de gaz d'échappement pour un moteur à combustion interne
US20010045090A1 (en) * 1999-07-22 2001-11-29 Gray Charles L. Low emission, diesel-cycle engine
US6301887B1 (en) 2000-05-26 2001-10-16 Engelhard Corporation Low pressure EGR system for diesel engines
US6367256B1 (en) 2001-03-26 2002-04-09 Detroit Diesel Corporation Exhaust gas recirculation with condensation control

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006045488A1 (fr) * 2004-10-25 2006-05-04 Behr Gmbh & Co. Kg Condensateur d'un systeme de turbocompresseur et procede d'utilisation d'un tel systeme
EP1724453A1 (fr) * 2005-05-20 2006-11-22 Behr GmbH & Co. KG Mécanisme de turbocompresseur et procédé d'utilisation de celui-ci
FR2893677A1 (fr) * 2005-11-23 2007-05-25 Renault Sas Dispositif de recirculation des gaz brules et refroidisseur d'air de suralimentation adapte pour un tel dispositif
WO2009081226A1 (fr) * 2007-12-20 2009-07-02 Renault Trucks Agencement de moteur à combustion interne avec système de vidange egr
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
EP2161438A2 (fr) 2008-09-03 2010-03-10 Behr GmbH & Co. KG Système de récupération de gaz d'échappement d'un moteur à combustion interne et procédé de récupération de gaz d'échappement d'un moteur à combustion interne
EP2161438A3 (fr) * 2008-09-03 2011-06-01 Behr GmbH & Co. KG Système de récupération de gaz d'échappement d'un moteur à combustion interne et procédé de récupération de gaz d'échappement d'un moteur à combustion interne
US20110079002A1 (en) * 2009-10-06 2011-04-07 International Engine Intellectual Property Company Llc System and method for condensate removal from egr system
US8418461B2 (en) * 2009-10-06 2013-04-16 International Engine Intellectual Property Company, Llc System and method for condensate removal from EGR system
WO2011066871A1 (fr) * 2009-12-04 2011-06-09 Caterpillar Motoren Gmbh & Co. Kg Systeme et procede de recirculation des gaz d'echappement
EP2354520A2 (fr) 2010-01-27 2011-08-10 Audi AG Véhicule automobile doté d'une installation de gaz d'échappement
DE102010005784A1 (de) 2010-01-27 2011-07-28 Audi Ag, 85057 Kraftwagen mit einer Abgasanlage
US8733329B2 (en) 2010-01-27 2014-05-27 Audi Ag Motor vehicle having an exhaust gas system
EP2354520A3 (fr) * 2010-01-27 2014-07-09 Audi AG Véhicule automobile doté d'une installation de gaz d'échappement
WO2012000811A1 (fr) * 2010-06-30 2012-01-05 Valeo Systemes Thermiques Dispositif de recirculation de gaz d'échappement d'un moteur de véhicule automobile et utilisation d'un tel dispositif
FR2962164A1 (fr) * 2010-06-30 2012-01-06 Valeo Systemes Thermiques Dispositif de recirculation de gaz d'echappement d'un moteur de vehicule automobile
US9957923B2 (en) 2010-06-30 2018-05-01 Valeo Systemes Thermiques Device for recirculating exhaust gas from the engine of an automobile, and use of such a device
WO2012045673A1 (fr) * 2010-10-05 2012-04-12 Mahle International Gmbh Filtre de recirculation de gaz d'échappement, moteur à combustion interne
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

Also Published As

Publication number Publication date
ITMI20032554A1 (it) 2005-06-23
EP1548269B1 (fr) 2009-12-09
ES2337464T3 (es) 2010-04-26
ATE451547T1 (de) 2009-12-15
DE602004024494D1 (de) 2010-01-21

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