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EP1081368A1 - Exhaust recirculation system and its method for controlling - Google Patents

Exhaust recirculation system and its method for controlling Download PDF

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Publication number
EP1081368A1
EP1081368A1 EP99117367A EP99117367A EP1081368A1 EP 1081368 A1 EP1081368 A1 EP 1081368A1 EP 99117367 A EP99117367 A EP 99117367A EP 99117367 A EP99117367 A EP 99117367A EP 1081368 A1 EP1081368 A1 EP 1081368A1
Authority
EP
European Patent Office
Prior art keywords
valve
exhaust gas
connection point
recirculation system
exhaust
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.)
Ceased
Application number
EP99117367A
Other languages
German (de)
French (fr)
Inventor
Franz-Arnd Dr. Sommerhoff
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to EP99117367A priority Critical patent/EP1081368A1/en
Publication of EP1081368A1 publication Critical patent/EP1081368A1/en
Ceased 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
    • F02M26/39—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in series
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • 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
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the 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
    • F02M26/17—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
    • F02M26/21—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 with EGR valves located at or near the connection to the intake system

Definitions

  • the invention relates to an exhaust gas recirculation system for internal combustion engines, especially small turbo-charged diesel engines.
  • shut-off valve To improve dynamic behavior it is suggested in the Return line near the connection point to the exhaust manifold heat-resistant valve, especially shut-off valve. This can the volume upstream of a turbine integrated in the exhaust system closed stop valve can be reduced. With the shut-off valve closed the dynamic behavior of the internal combustion engine approaches that of one without exhaust gas recirculation. As a result, the Torque curve optimized over the speed.
  • shut-off valve is closed in full load operation.
  • Fig. 1 shows a schematic arrangement of the exhaust gas recirculation system on the Internal combustion engine.
  • the internal combustion engine 1 is equipped with an air intake line 2 Air intake system connected. There is a compressor 5 in the air intake system arranged, which is driven by the turbine 4 arranged in the exhaust system becomes. In the exhaust system, there is a connection point 11 for the exhaust manifold 3 Return line 6 is provided, which at the junction 10 in the Air intake line 2 opens. Near this junction 10 is the throttle valve to regulate the return line 6 into the air intake line 2 Arranged mass flow of exhaust gas arranged. By arranging the Throttle valve 8 behind the exhaust gas cooler 7, the reliability of the control of the recirculated exhaust gas mass flow improved.
  • Fig. 2 shows the torque curve over the speed.
  • the solid line gives the torque curve for a small turbo charged Diesel internal combustion engine at full load with closed Shut-off valve 9 again, the dashed curve shows the torque curve at open shut-off valve 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

The system has a throttle valve (8) in a recirculation line (6) near to a connection point (10) for an air suction line (2). A thermally stable cut-off valve (9) is arranged near a connection point (11) for an exhaust gas manifold (3). An Independent claim is included for a method to control the exhaust gas recirculation system.

Description

Die Erfindung betrifft ein Abgasrückführungssystem für Verbrennungsmotoren, insbesondere kleine turbogeladene Dieselmotoren.The invention relates to an exhaust gas recirculation system for internal combustion engines, especially small turbo-charged diesel engines.

Speziell bei kleinen Motoren mit entsprechend kleinen Abgassystemen führt die Anbringung der Abgasrückführungsleitung zu einer erheblichen Vergrößerung des Volumens des Abgassystems. Dies trifft insbesondere dann zu, wenn in die Abgasrückführungsleitung für die zuverlässige Regelung des rückgeführten Abgasmassenstromes ein Regelventil nahe der Anschlußstelle zur Luftansaugleitung und hinter dem Abgaskühler angeordnet ist. Diese Anordnung bietet zwar den Vorteil einer kostengünstigen und zuverlässigen Regelung, hat jedoch zur Folge, daß eine Vergrößerung des Volumens der Abgasleitung um das Volumen der Rückführungsleitung zwischen Drosselventil und Anschlußstelle der Rückführungsleitung einschließlich Abgaskühler an den Abgaskrümmer vergrößert wird. Dies führt bei Volllastbetrieb zu einem verschlechterten dynamischen Verhalten bzw. zu einer Verringerung des Drehmomentes.Especially in the case of small engines with correspondingly small exhaust systems, the Attachment of the exhaust gas recirculation line to a considerable enlargement of the Volume of the exhaust system. This is especially true if in the Exhaust gas recirculation line for the reliable control of the recirculated Exhaust mass flow a control valve near the connection point to the air intake line and is arranged behind the exhaust gas cooler. This arrangement offers has the advantage of a cost-effective and reliable regulation, however Consequence that an increase in the volume of the exhaust pipe by the volume the return line between the throttle valve and the connection point of the Return line including exhaust gas cooler to the exhaust manifold enlarged becomes. This leads to a deteriorated dynamic at full load operation Behavior or a reduction in torque.

Zur Verbesserung des dynamischen Verhaltens wird vorgeschlagen, in die Rückführungsleitung nahe der Anschlußstelle zum Abgaskrümmer ein hitzebeständiges Ventil, insbesondere Absperrventil, einzubauen. Hierdurch kann das Volumen stromaufwärts einer in das Abgassystem integrierten Turbine bei geschlossenem Ansperrventil verringert werden. Bei geschlossenem Absperrventil nähert sich das dynamische Verhalten der Verbrennungskraftmaschine dem einer ohne Abgasrückführung an. Hierdurch wird im Volllastbetrieb der Drehmomentverlauf über der Drehzahl optimiert.To improve dynamic behavior it is suggested in the Return line near the connection point to the exhaust manifold heat-resistant valve, especially shut-off valve. This can the volume upstream of a turbine integrated in the exhaust system closed stop valve can be reduced. With the shut-off valve closed the dynamic behavior of the internal combustion engine approaches that of one without exhaust gas recirculation. As a result, the Torque curve optimized over the speed.

Entsprechend ist im Volllastbetrieb das Absperrventil geschlossen. Accordingly, the shut-off valve is closed in full load operation.

Fig. 1 zeigt eine schematische Anordnung des Abgasrückführungssystems an der Verbrennungskraftmaschine.Fig. 1 shows a schematic arrangement of the exhaust gas recirculation system on the Internal combustion engine.

Die Verbrennungskraftmaschine 1 ist mit einer Luftansaugleitung 2 des Luftansaugsystems verbunden. Im Luftansaugsystem ist ein Kompressor 5 angeordnet, der von der im Abgassystem angeordneten Turbine 4 angetrieben wird. Im Abgassystem ist am Abgaskrümmer 3 eine Anschlußstelle 11 für die Rückführungsleitung 6 vorgesehen, welche an der Anschlußstelle 10 in die Luftansaugleitung 2 mündet. Nahe dieser Anschlußstelle 10 ist das Drosselventil zur Regelung des über die Rückführungsleitung 6 in die Luftansaugleitung 2 gelangenden Massenstromes an Abgas angeordnet. Durch die Anordnung des Drosselventiles 8 hinter dem Abgaskühler 7 wird die Zuverlässigkeit der Regelung des rückgeführten Abgasmassenstromes verbessert. Das zwischen der Turbine 4 und den Auslaßventilen der Verbrennungskraftmaschine 1 stromaufwärts der Turbine befindliche Volumen des Abgassystems ist um das Volumen der Rückführungsleitung zwischen den Anschlußstellen 11 und 10 bzw. bis zum Drosselventil 8 vergrößert. Ein in die Rückführungsleitung 6 integrierter Abgaskühler 7 führt ebenfalls zu einer Vergrößerung des Volumens stromaufwärts der Turbine 4. Im Volllastbetrieb wird dieses Volumen durch das Absperrventil 9 im geschlossenen Zustand erheblich verringert, nämlich auf das Volumen zwischen der Anschlußstelle 11 und dem Absperrventil 9.The internal combustion engine 1 is equipped with an air intake line 2 Air intake system connected. There is a compressor 5 in the air intake system arranged, which is driven by the turbine 4 arranged in the exhaust system becomes. In the exhaust system, there is a connection point 11 for the exhaust manifold 3 Return line 6 is provided, which at the junction 10 in the Air intake line 2 opens. Near this junction 10 is the throttle valve to regulate the return line 6 into the air intake line 2 Arranged mass flow of exhaust gas arranged. By arranging the Throttle valve 8 behind the exhaust gas cooler 7, the reliability of the control of the recirculated exhaust gas mass flow improved. That between the turbine 4 and the exhaust valves of the engine 1 upstream of the Turbine volume of the exhaust system is around the volume of the Return line between the connection points 11 and 10 or to Throttle valve 8 enlarged. An integrated in the return line 6 Exhaust gas cooler 7 also leads to an increase in the volume upstream the turbine 4. In full load operation, this volume is shut off valve 9 in closed state significantly reduced, namely on the volume between the connection point 11 and the shut-off valve 9.

Fig. 2 zeigt den Drehmomentverlauf über der Drehzahl. Die durchgezogene Linie gibt den Drehmomentverlauf für eine kleine turbogeladene Dieselverbrennungskraftmaschine bei Volllastbetrieb mit geschlossenem Absperrventil 9 wieder, die gestrichelte Kurve zeigt den Drehmomentverlauf bei geöffnetem Absperrventil 9. Durch das Schließen des Absperrventiles 9 wird insbesondere auch eine deutliche Verbesserung des maximalen Drehmomentes bei etwa 2.500 Umdrehungen erreicht.Fig. 2 shows the torque curve over the speed. The solid line gives the torque curve for a small turbo charged Diesel internal combustion engine at full load with closed Shut-off valve 9 again, the dashed curve shows the torque curve at open shut-off valve 9. By closing the shut-off valve 9 especially a significant improvement in the maximum torque reached at about 2,500 revolutions.

Claims (3)

Abgasrückführungssystem mit in die Rückführungsleitung (6) nahe der Anschlußstelle (10) zur Luftansaugleitung (2) eingebautem Drosselventil (8),
dadurch gekennzeichnet, daß
   nahe der Anschlußstelle (11) zum Abgaskrümmer (3) ein wärmebeständiges Ventil (9) angeordnet ist.Exhaust gas recirculation system with throttle valve (8) built into the return line (6) near the connection point (10) to the air intake line (2),
characterized in that
A heat-resistant valve (9) is arranged near the connection point (11) to the exhaust manifold (3). Abgasrückführungssystem nach Anspruch 1,
dadurch gekennzeichnet, daß
   als Ventil (9) ein Absperrventil angeordnet ist.Exhaust gas recirculation system according to claim 1,
characterized in that
a shut-off valve is arranged as a valve (9). Verfahren zur Steuerung eines Abgasrückführungssystems mit in die Rückführungsleitung (6) nahe der Anschlußstelle (10) zur Luftansaugleitung (2) eingebautem Drosselventil (8) und einem nahe der Anschlußstelle (11) zum Abgaskrümmer (3) eingebauten, wärmebeständigen Absperrventil (9),
dadurch gekennzeichnet, daß
   im Volllastbetrieb das Absperrventil (9) geschlossen ist.Method for controlling an exhaust gas recirculation system with a throttle valve (8) installed in the return line (6) near the connection point (10) to the air intake line (2) and a heat-resistant shut-off valve (9) installed near the connection point (11) to the exhaust manifold (3),
characterized in that
the shut-off valve (9) is closed in full load operation.
EP99117367A 1999-09-03 1999-09-03 Exhaust recirculation system and its method for controlling Ceased EP1081368A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99117367A EP1081368A1 (en) 1999-09-03 1999-09-03 Exhaust recirculation system and its method for controlling

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Application Number Priority Date Filing Date Title
EP99117367A EP1081368A1 (en) 1999-09-03 1999-09-03 Exhaust recirculation system and its method for controlling

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EP1081368A1 true EP1081368A1 (en) 2001-03-07

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2369164A1 (en) * 2008-12-10 2011-09-28 Toyota Jidosha Kabushiki Kaisha Control apparatus of internal combustion engine
FR2983526A1 (en) * 2011-12-05 2013-06-07 Peugeot Citroen Automobiles Sa DEVICE FOR RECIRCULATING AIR IN A THERMAL ENGINE
EP2706218A1 (en) * 2011-05-02 2014-03-12 Toyota Jidosha Kabushiki Kaisha Internal combustion engine operation control method
WO2015197993A1 (en) * 2014-06-26 2015-12-30 Valeo Systemes De Controle Moteur Engine system comprising a burnt gas recirculation circuit
US20200149490A1 (en) * 2018-11-08 2020-05-14 GM Global Technology Operations LLC Vehicle system and a method of increasing efficiency of an engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205265A (en) * 1991-03-28 1993-04-27 Mazda Motor Corporation Exhaust gas recirculation system
EP0585105A1 (en) * 1992-08-24 1994-03-02 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Internal combustion engines with exhaust gas recirculation
US5682746A (en) * 1995-06-14 1997-11-04 Man Nutzfahrzeuge Aktiengesellschaft Exhaust gas return system for a turbo-charged internal combustion engine
EP0840000A1 (en) * 1996-10-24 1998-05-06 Isuzu Motors Limited Exhaust gas recirculation apparatus
WO1998041746A1 (en) * 1997-03-14 1998-09-24 Scania Cv Aktiebolag (Publ) Method for controlling a combustion engine during starting and a combustion engine for implementing the method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205265A (en) * 1991-03-28 1993-04-27 Mazda Motor Corporation Exhaust gas recirculation system
EP0585105A1 (en) * 1992-08-24 1994-03-02 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Internal combustion engines with exhaust gas recirculation
US5682746A (en) * 1995-06-14 1997-11-04 Man Nutzfahrzeuge Aktiengesellschaft Exhaust gas return system for a turbo-charged internal combustion engine
EP0840000A1 (en) * 1996-10-24 1998-05-06 Isuzu Motors Limited Exhaust gas recirculation apparatus
WO1998041746A1 (en) * 1997-03-14 1998-09-24 Scania Cv Aktiebolag (Publ) Method for controlling a combustion engine during starting and a combustion engine for implementing the method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2369164A1 (en) * 2008-12-10 2011-09-28 Toyota Jidosha Kabushiki Kaisha Control apparatus of internal combustion engine
EP2369164A4 (en) * 2008-12-10 2013-12-18 Toyota Motor Co Ltd CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
EP2706218A1 (en) * 2011-05-02 2014-03-12 Toyota Jidosha Kabushiki Kaisha Internal combustion engine operation control method
EP2706218A4 (en) * 2011-05-02 2014-04-23 Toyota Motor Co Ltd METHOD FOR OPERATING CONTROL OF INTERNAL COMBUSTION ENGINE
FR2983526A1 (en) * 2011-12-05 2013-06-07 Peugeot Citroen Automobiles Sa DEVICE FOR RECIRCULATING AIR IN A THERMAL ENGINE
EP2602467A1 (en) * 2011-12-05 2013-06-12 Peugeot Citroën Automobiles Sa Device for air recirculation in an internal combustion engine
WO2015197993A1 (en) * 2014-06-26 2015-12-30 Valeo Systemes De Controle Moteur Engine system comprising a burnt gas recirculation circuit
FR3022946A1 (en) * 2014-06-26 2016-01-01 Valeo Sys Controle Moteur Sas ENGINE SYSTEM WITH BURN GAS RECIRCULATION CIRCUIT
US20200149490A1 (en) * 2018-11-08 2020-05-14 GM Global Technology Operations LLC Vehicle system and a method of increasing efficiency of an engine

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