EP2108807A1 - Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne - Google Patents

Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne Download PDF

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Publication number
EP2108807A1
EP2108807A1 EP09151997A EP09151997A EP2108807A1 EP 2108807 A1 EP2108807 A1 EP 2108807A1 EP 09151997 A EP09151997 A EP 09151997A EP 09151997 A EP09151997 A EP 09151997A EP 2108807 A1 EP2108807 A1 EP 2108807A1
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EP
European Patent Office
Prior art keywords
exhaust gas
gas recirculation
internal combustion
combustion engine
turbine
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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
EP09151997A
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German (de)
English (en)
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EP2108807B1 (fr
Inventor
Holger Paffrath
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Pierburg GmbH
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Pierburg GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • 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
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
    • 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
    • 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
    • F02M26/13—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
    • F02M26/24—Layout, e.g. schematics with two or more coolers
    • 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
    • F02M26/28—Layout, e.g. schematics with 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
    • F02M26/43—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 exhaust from only one cylinder or only a group of cylinders is directed to the intake of the engine

Definitions

  • the invention relates to an exhaust gas recirculation system for an internal combustion engine with an exhaust gas recirculation valve, which is arranged in an exhaust gas recirculation line, a first exhaust gas cooler, which is arranged in the exhaust gas recirculation line and a turbine, which is arranged in the flow direction of the exhaust gas behind the first exhaust gas cooler in the exhaust gas recirculation line.
  • Exhaust gas recirculation systems for internal combustion engines in which in the exhaust gas recirculation line an exhaust gas cooler and an exhaust gas recirculation valve are arranged, are well known and are described in a variety of applications. Such cooled exhaust gas recirculation systems are used, in particular in turbocharged internal combustion engines. The cooling of the exhaust gas leads to significant advantages in terms of emissions and fuel consumption of the vehicle.
  • Cooling of the exhaust gas is currently used in particular in low-pressure systems application, but are also known the dynamic working high-pressure systems in which after the cold start hot exhaust gas is recycled through the high-pressure line. For further emission and fuel consumption improvement, it would make sense to cool the exhaust gas lower than usual today and below the existing coolant temperatures. This can additionally reduce the tendency to knock in gasoline engines.
  • a disadvantage of the known systems is that at high power of the exhaust gas cooler, they tend to strong sooting due to the low exhaust gas temperature.
  • a turbo cooling unit which consists of a driven compressor an exhaust gas cooler and a compressor coupled to the turbine. While it is possible by the driven compressor to achieve a sufficient pressure drop for the return of the exhaust gas in the low pressure region, the turbine provides additional relaxation of the exhaust gas cooled in the exhaust gas, resulting in additional cooling of the exhaust gas optionally below the coolant temperature.
  • a disadvantage of such a system is the necessary mechanical drive of the compressor, without which no sufficient pressure gradient can be built, and the consequent additional energy loss of the entire system. Furthermore, such a system does not have sufficient dynamics.
  • the control valve is arranged in the exhaust manifold between the Einzelauslassrohren the individual cylinders, so that when the control flap is closed only the exhaust gas of the separated by the control valve cylinder enters the exhaust gas recirculation line.
  • Such an arrangement has the advantage that a sufficient amount of exhaust gas is always available to a downstream turbine in the exhaust gas system, since only the exhaust gas of individual cylinders is dammed up and thus the exhaust gas recirculation is available.
  • An additional compressor in the exhaust gas recirculation line can be dispensed with, so that the drive of a compressor-turbine unit is eliminated in comparison with known designs. This leads to an additional improvement in fuel consumption.
  • the turbine can be bypassed via a bypass channel, in which a second control flap is arranged.
  • a bypass channel in which a second control flap is arranged.
  • a turbo-cooling unit is arranged behind the first exhaust gas cooler, which has a turbine coupled to the compressor and a second exhaust gas cooler, wherein in the flow direction of the exhaust behind the first exhaust gas cooler first the compressor, then the second exhaust gas cooler and following the turbine arranged is.
  • the compressor does not have to be driven in such an embodiment, but consumes only the power generated by the turbine.
  • the use of such a turbo cooling unit increases the possibilities for further cooling of the exhaust gas in the exhaust gas recirculation line.
  • the turbine is coupled to a generator or blower to which the turbine delivers its power.
  • the energy balance of the internal combustion engine can be additionally improved.
  • the turbo cooling unit is designed as a structural unit, so that the required space is further reduced.
  • the exhaust gas recirculation line branches off from the exhaust line upstream of the turbine of a turbocharger and flows into the intake line of the internal combustion engine behind a charge air cooler.
  • Such an exhaust gas recirculation system is thus suitable both for further lowering the exhaust gas temperature of the recirculated exhaust gas and for minimizing sooting of the exhaust gas cooler.
  • a good controllability of the system is achieved both in terms of the recirculated exhaust gas quantity and the exhaust gas temperature.
  • This system has a high dynamic, leads to lower fuel consumption and to an improvement of emissions, especially of nitrogen oxides.
  • the figure shows an inventive exhaust gas recirculation system using the example of a turbocharged four-cylinder internal combustion engine with turbo cooling unit.
  • the internal combustion engine consists of an intake pipe 1, via which fresh air is first sucked via a compressor 2 into the intake system of the internal combustion engine.
  • the compressed air is passed via an intercooler 3 to an intake manifold 4.
  • the enriched with exhaust gas fresh air reaches the cylinders 5, which is in the present embodiment, a four-cylinder internal combustion engine.
  • the resulting exhaust gas is expelled into the exhaust manifold 6, from where the exhaust gas flows to a arranged in the exhaust line 7, coupled to the compressor 2 turbine 8. Behind the turbine 8, the exhaust gas enters the atmosphere.
  • the exhaust manifold 4 is fluidly connected via an exhaust gas recirculation line 9 to the intake pipe 1 in the area behind the charge air cooler 3.
  • an exhaust gas recirculation valve 10 is arranged in the exhaust gas recirculation line.
  • an exhaust gas cooler 11 is arranged for temperature control of the exhaust gas.
  • This exhaust gas cooler 11 includes a bypass line 12 through which the exhaust gas cooler 11 can be bypassed.
  • a bypass valve 13 which is arranged in the present embodiment, seen in the flow direction in front of the exhaust gas cooler 11.
  • the turbo cooling unit 14 in the present embodiment consists of a compressor 16, a second smaller exhaust gas cooler 17 and a turbine 18, with the compressor 16 is coupled.
  • the compressor 16 is driven only by the output from the turbine power.
  • the exhaust manifold 6 consists of four Einzelauslassrohren 19, which end in a manifold 20 of the exhaust manifold 6.
  • a control valve 21 is arranged according to the invention, which separates one of the Einzelauslassrohre 19 of a cylinder 5 of the Einzelauslassrohren 19 of the other cylinder 5.
  • Another control valve 22 is disposed in the bypass passage 15 to control the exhaust gas recirculation flow flowing through the bypass passage 15 or the turbo cooling unit 14.
  • the gas coming from the fourth cylinder 5 flows completely into the exhaust gas recirculation line 9 to the exhaust gas recirculation valve 10, via which the recirculated exhaust gas quantity is controlled according to the position of the valve.
  • the exhaust gas recirculation valve 10 is a pressure of, for example, 4.53 bar at a temperature of 823 K on. The valve reduces both the pressure to about 4.43 bar and the temperature to about 733 K.
  • the bypass flap 13 is closed, the temperature of the exhaust gas in the exhaust gas cooler 11 decreases to, for example, 463 K at a pressure of 4.33 bar.
  • the second control flap 22 is closed, the exhaust gas flows via the turbo cooling unit 14.
  • the pressure of the exhaust gas in the compressor is first increased to approximately 5.2 bar, which at the same time results in an increase in the temperature to approximately 508 K.
  • This temperature is now lowered in the second exhaust gas cooler 17 to about 401 K, whereby a small pressure drop to about 5.1 bar follows.
  • the turbine 18 in the turbo cooling unit 14 a significant reduction of both the pressure and the temperature by the relaxation takes place.
  • the pressure drops, for example, to 2.5 bar, while the temperature can be lowered to 361 K, which is below the usual coolant temperature of an internal combustion engine.
  • the pressure is still high enough so that exhaust gas can be returned to the intake passage 1.
  • the invention is not limited to the given embodiment.
  • the first control flap 21 may be arranged behind the exhaust manifold 6 in the exhaust gas line 7 in order to generate a sufficient pressure gradient.
  • all the exhaust gas would have to be pushed out at an elevated pressure level, which could lead to increased fuel consumption.
  • the system behaves like a conventional high-pressure exhaust gas recirculation system with open control valve 21 and open damper 22, it should be noted that in a closure of the bypass channel 15 and the control valve 21 is at least partially close, otherwise no Exhaust gas could be recycled in sufficient quantity.
EP09151997A 2008-04-12 2009-02-04 Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne Active EP2108807B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008018583A DE102008018583A1 (de) 2008-04-12 2008-04-12 Abgasrückführsystem für eine Verbrennungskraftmaschine

Publications (2)

Publication Number Publication Date
EP2108807A1 true EP2108807A1 (fr) 2009-10-14
EP2108807B1 EP2108807B1 (fr) 2013-01-02

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ID=40863605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09151997A Active EP2108807B1 (fr) 2008-04-12 2009-02-04 Dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne

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US (1) US20090255251A1 (fr)
EP (1) EP2108807B1 (fr)
DE (1) DE102008018583A1 (fr)

Families Citing this family (13)

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Publication number Priority date Publication date Assignee Title
US8176736B2 (en) * 2008-03-21 2012-05-15 Cummins Inc. EGR apparatuses, systems, and methods
US8640457B2 (en) * 2009-10-13 2014-02-04 General Electric Company System and method for operating a turbocharged engine
DE102010005803A1 (de) * 2010-01-27 2011-07-28 Audi Ag, 85057 Kraftwagen mit einer Abgasanlage
US8915081B2 (en) * 2011-04-13 2014-12-23 GM Global Technology Operations LLC Internal combustion engine
DE112014001893T5 (de) * 2013-05-10 2016-01-07 Modine Manufacturing Company Abgaswärmetauscher und Verfahren
WO2014205168A1 (fr) * 2013-06-21 2014-12-24 Eaton Corporation Dérivation des gaz d'échappement de compresseur d'alimentation
KR20150111322A (ko) * 2014-03-25 2015-10-05 한온시스템 주식회사 자동차 내연 기관의 배기가스 재순환 장치
DE102015104179B4 (de) 2014-03-25 2022-03-03 Hanon Systems Vorrichtungen zur Rückführung von Abgas eines Verbrennungsmotors in einem Kraftfahrzeug
US9670823B2 (en) * 2015-03-24 2017-06-06 GM Global Technology Operations LLC Engine with a turbocharger cooling module
DE102015208957A1 (de) * 2015-05-15 2016-11-17 Ford Global Technologies, Llc Selbstzündende Brennkraftmaschine mit Abgasturboaufladung und Abgasrückführung
US9989020B2 (en) 2015-05-15 2018-06-05 Ford Global Technologies, Llc Auto-ignition internal combustion engine with exhaust-gas turbocharging and exhaust-gas recirculation
FR3053407B1 (fr) * 2016-06-30 2019-06-28 Valeo Systemes De Controle Moteur Ensemble de circulation de gaz d’echappement d’un moteur thermique
DE102021100844B3 (de) 2021-01-18 2022-02-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kraftfahrzeug mit einem Verbrennungsmotor und einem Turbolader sowie Verfahren zum Betrieb eines Kraftfahrzeugs

Citations (6)

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Publication number Priority date Publication date Assignee Title
US2703561A (en) * 1954-01-13 1955-03-08 Nordberg Manufacturing Co Inlet air cooling device and method for internal-combustion engines
DE1003505B (de) * 1954-09-10 1957-02-28 Henschel & Sohn Gmbh Aufgeladene Brennkraftmaschine mit Entspannungsturbine
DE1214931B (de) * 1962-02-26 1966-04-21 Sulzer Ag Regelung der Temperatur der Verbrennungsluft einer Zweistoff-Brennkraftmaschine
EP1186767A2 (fr) 2000-09-11 2002-03-13 Toyota Jidosha Kabushiki Kaisha Système de recirculation de gaz d'échappement pour un moteur à combustion interne
DE102005021172A1 (de) * 2005-05-06 2006-11-09 Daimlerchrysler Ag Brennkraftmaschine mit Abgasturbolader und Abgasrückführung
US20070175215A1 (en) 2006-02-02 2007-08-02 Rowells Robert L Constant EGR rate engine and method

Family Cites Families (5)

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US5617726A (en) * 1995-03-31 1997-04-08 Cummins Engine Company, Inc. Cooled exhaust gas recirculation system with load and ambient bypasses
US6138649A (en) * 1997-09-22 2000-10-31 Southwest Research Institute Fast acting exhaust gas recirculation system
US6324846B1 (en) * 1999-03-31 2001-12-04 Caterpillar Inc. Exhaust gas recirculation system for an internal combustion engine
US7287378B2 (en) * 2002-10-21 2007-10-30 International Engine Intellectual Property Company, Llc Divided exhaust manifold system and method
FR2913057B1 (fr) * 2007-02-27 2009-04-10 Renault Sas Systeme de chauffage pour vehicule couple a un systeme de recirculation de gaz d'echappement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703561A (en) * 1954-01-13 1955-03-08 Nordberg Manufacturing Co Inlet air cooling device and method for internal-combustion engines
DE1003505B (de) * 1954-09-10 1957-02-28 Henschel & Sohn Gmbh Aufgeladene Brennkraftmaschine mit Entspannungsturbine
DE1214931B (de) * 1962-02-26 1966-04-21 Sulzer Ag Regelung der Temperatur der Verbrennungsluft einer Zweistoff-Brennkraftmaschine
EP1186767A2 (fr) 2000-09-11 2002-03-13 Toyota Jidosha Kabushiki Kaisha Système de recirculation de gaz d'échappement pour un moteur à combustion interne
DE102005021172A1 (de) * 2005-05-06 2006-11-09 Daimlerchrysler Ag Brennkraftmaschine mit Abgasturbolader und Abgasrückführung
US20070175215A1 (en) 2006-02-02 2007-08-02 Rowells Robert L Constant EGR rate engine and method

Also Published As

Publication number Publication date
DE102008018583A1 (de) 2009-10-22
US20090255251A1 (en) 2009-10-15
EP2108807B1 (fr) 2013-01-02

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