EP1238194B1 - Exhaust gas recirculation device - Google Patents

Exhaust gas recirculation device Download PDF

Info

Publication number
EP1238194B1
EP1238194B1 EP00991170A EP00991170A EP1238194B1 EP 1238194 B1 EP1238194 B1 EP 1238194B1 EP 00991170 A EP00991170 A EP 00991170A EP 00991170 A EP00991170 A EP 00991170A EP 1238194 B1 EP1238194 B1 EP 1238194B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
exhaust gas
valve
gas recirculation
line
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.)
Expired - Lifetime
Application number
EP00991170A
Other languages
German (de)
French (fr)
Other versions
EP1238194A1 (en
Inventor
Werner Remmels
Peter Mattes
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.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen GmbH
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 MTU Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP1238194A1 publication Critical patent/EP1238194A1/en
Application granted granted Critical
Publication of EP1238194B1 publication Critical patent/EP1238194B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M26/42—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
    • 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
    • F02M26/14—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
    • F02M26/39—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

Definitions

  • the invention relates to a device for exhaust gas recirculation during operation
  • Electric combustion engine according to the preamble of patent claim 1.
  • An effective measure to reduce nitrogen oxide emissions in internal combustion engines is the exhaust gas recirculation.
  • a device for exhaust gas recirculation goes out, for example of US 5,517,976 as known.
  • the cylinders are a charged one Internal combustion engine divided into two groups, the exhaust gas of a group, Preferably, a cylinder, via an exhaust gas recirculation line of the suction line of Internal combustion engine is supplied.
  • the exhaust gas of the other cylinder group is in a Collected exhaust manifold and fed to the turbine of an exhaust gas turbocharger.
  • the Exhaust gas recirculation and the exhaust manifold are via a connecting line and a valve device connected to each other, which has a flow cross-section of the Connection line controls.
  • An analog device is also shown in DE 39 30 243 A1, where a 3/2-way valve serves to shut off the exhaust gas recirculation in cold Internal combustion engine and low load.
  • a 3/2-way valve serves to shut off the exhaust gas recirculation in cold Internal combustion engine and low load.
  • Exhaust gas recirculation reaches the exhaust gas of a connected to the exhaust gas recirculation line Cylinder in the connected to the other cylinder exhaust manifold.
  • the problem with such a device the division of the cylinder in two Groups is, of which a group is provided for exhaust gas recirculation, is the need for an arrangement of a valve device in the field of Exhaust manifold, where the installation conditions are very cramped. If the Is exhaust manifold is cooled, is also the implementation of the drive shaft through to solve the water jacket only with great design effort.
  • a further device as known which is a group of exhaust cylinders for exhaust gas recirculation draws.
  • a valve device with two valves for controlling the exhaust gas flows.
  • a Check valve used to prevent the entry of combustion air out of the Prevent air supply line in the exhaust gas recirculation line.
  • DE 19521573 A1 is a supercharged internal combustion engine with exhaust gas recirculation represented in the exhaust gas recirculation line, a check valve and also a Contains valve for switching off exhaust gas recirculation.
  • the recirculated exhaust gas is a Taken off exhaust manifold, to which all cylinders of the internal combustion engine are connected. Disadvantage of this design is that the exhaust gas composition of recirculated exhaust gas can not be optimally adjusted because a cylinder-individual Control to influence the exhaust gas quality of the recirculated exhaust gas not possible is.
  • the invention is based on the problem for internal combustion engines with two groups of Cylinders, of which one group ("donor cylinder") the exhaust gas for exhaust gas recirculation provides an exhaust gas recirculation valve device, which is in the range of Exhaust manifold requires little design effort.
  • One preferably designed as a flap with a return spring check valve divides the Exhaust manifold in two sections.
  • the integration of a check valve without Control in the exhaust manifold prepares even in limited space no design problems.
  • the control of the recirculated exhaust gas streams is made by a controllable valve in the exhaust gas recirculation line.
  • the order a controllable valve including drive shaft and servomotor in the exhaust gas recirculation line there prepares because of the space available there any Problems. In this way, one in terms of design effort and costs achieved favorable solution.
  • FIG. 1 shows a system diagram of an internal combustion engine 1 with the line system for Combustion air and exhaust gas.
  • the combustion air is the cylinders 2.3 of the Internal combustion engine 1 is supplied via a suction line 4, which is the compressor of a Exhaust gas turbocharger contains.
  • the exhaust gas of the cylinder 2,3 is in an exhaust manifold 5 received, which includes the turbine 6 of the exhaust gas turbocharger.
  • the Exhaust manifold 5 further has a connection to an exhaust gas recirculation line 7, which is connected to the intake pipe 4.
  • the exhaust gas recirculation is through valves 10 and 11 controlled in the exhaust manifold 5 and in the exhaust gas recirculation line 7 are arranged. Designed as a check valve valve 10, which in the Exhaust manifold 5 between the terminals of the cylinder groups 2 and 3, separates two areas of the exhaust manifold 5.
  • valves 10 and 11 are designed as flaps.
  • the in the exhaust gas recirculation line 7th arranged valve 11 is in response to engine operating parameters in an open Position for exhaust gas recirculation (FIG. 2a) and a closed position (FIG. 2b) switchable, in which no exhaust gas recirculation takes place. Due to the kickback function of Valve 10 comes only the exhaust gas of the cylinder 3 for feedback.
  • the arranged in the exhaust manifold 5 valve 10 is exhaust gas recirculation due to the adjusting pressure conditions and the effect of a Return spring 12 held in the closed position in abutment against an abutment 13, as shown in Figure 2a.
  • the restoring force of the spring is chosen so that in Coordinate with the existing pressure conditions the desired opening and Closing conditions are met.
  • a damping element that acts on the flap, prevents flutter motions caused by pressure surges.
  • the direction of the Exhaust gas streams are shown by arrows 14,15 and 16.
  • valve 11 When the exhaust gas recirculation shutdown, the valve 11 in the closed position is brought in accordance with Figure 2b, the valve 10 opens due to the in the vom Valve 10 separated areas of the exhaust manifold adjusting pressure difference automatically and it creates a passage through which the exhaust gas of the cylinder 3 in the with the turbine 6 connected portion of the exhaust manifold overflows. The entire Exhaust gas from all cylinders reaches the turbine 6.
  • the valve 11 in the Exhaust gas recirculation line 7 to open only a part, so that only a part of the exhaust gas of the Cylinder 3 (donor cylinder) is returned to the suction line while the other Part passes together with the exhaust gas of the remaining cylinder 2 to the exhaust gas turbine.
  • the Exhaust gas pressure in the exhaust gas recirculation line is dependent inter alia on the opening of the Valve 11. The larger the opening of the valve 11, the lower is the due to the Backpressure caused exhaust pressure in the exhaust gas recirculation line, the larger is the be recycled exhaust gas.
  • the position of the valve 10 depends on the position of the valve 11.
  • valve device shown from the valves 10 and 11 for exhaust gas recirculation allowed in the exhaust manifold 7 a structurally simple design, because due to the arrangement of a controllable valve device in the exhaust gas recirculation line 7 in the exhaust manifold 5 only an automatic check valve is sufficient. That as spring-loaded flap trained check valve is also in tight Installation conditions can be displayed without complex design measures. In case of a cooled exhaust manifold especially eliminates the costly implementation the necessary drive shaft through the water jacket.
  • an automatic flap in the exhaust manifold has in the further the advantage that it can serve as a safety device in the event that the exhaust gas the donor cylinder, z. B. in case of a defect of the valve 11, in case of disturbances in the Control, in case of contamination or blockage of the exhaust gas cooler or other Nevertheless, components in the return line can escape.

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)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Supercharger (AREA)
  • Exhaust Silencers (AREA)

Description

Die Erfindung betrifft eine Einrichtung zur Abgasrückführung beim Betrieb mehrzylindriger Brennkraftmaschinen gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for exhaust gas recirculation during operation mehrzylindriger Internal combustion engine according to the preamble of patent claim 1.

Eine wirksame Maßnahme zur Senkung der Stickoxidemissionen bei Brennkraftmaschinen ist die Abgasrückführung. Eine Einrichtung zur Abgasrückführung geht beispielsweise aus der US 5,517,976 als bekannt hervor. Dort sind die Zylinder einer aufgeladenen Brennkraftmaschine in zwei Gruppen aufgeteilt, wobei das Abgas der einen Gruppe, vorzugsweise eines Zylinders, über eine Abgasrückführleitung der Ansaugleitung der Brennkraftmaschine zugeführt wird. Das Abgas der anderen Zylindergruppe wird in einer Abgassammelleitung gesammelt und der Turbine eines Abgasturboladers zugeleitet. Die Abgasrückführteitung und die Abgassammelleitung sind über eine Verbindungsleitung und eine Ventileinrichtung miteinander verbunden, die einen Strömungsquerschnitt der Verbindungsleitung steuert.An effective measure to reduce nitrogen oxide emissions in internal combustion engines is the exhaust gas recirculation. A device for exhaust gas recirculation goes out, for example of US 5,517,976 as known. There the cylinders are a charged one Internal combustion engine divided into two groups, the exhaust gas of a group, Preferably, a cylinder, via an exhaust gas recirculation line of the suction line of Internal combustion engine is supplied. The exhaust gas of the other cylinder group is in a Collected exhaust manifold and fed to the turbine of an exhaust gas turbocharger. The Exhaust gas recirculation and the exhaust manifold are via a connecting line and a valve device connected to each other, which has a flow cross-section of the Connection line controls.

Eine analoge Einrichtung ist auch in der DE 39 30 243 A1 dargestellt, wo ein 3/2-Wegeventil dazu dient, eine Abschaltung der Abgasrückführung bei kalter Brennkraftmaschine und niedriger Last vorzunehmen. Bei abgeschalteter Abgasrückführung gelangt das Abgas eines mit der Abgasrückführleitung verbundenen Zylinders in die an die übrigen Zylinder angeschlossene Abgassammelleitung. Problematisch an einer derartigen Einrichtung, die eine Unterteilung der Zylinder in zwei Gruppen vornimmt, von denen eine Gruppe für die Abgasrückführung vorgesehen ist, ist die Notwendigkeit einer Anordnung einer Ventileinrichtung im Bereich der Abgassammelleitung, wo die Einbauverhältnisse sehr beengt sind. Wenn die Abgassammelleitung gekühlt ist, ist außerdem die Durchführung der Antriebswelle durch den Wassermantel hindurch nur mit hohem konstruktiven Aufwand zu lösen.An analog device is also shown in DE 39 30 243 A1, where a 3/2-way valve serves to shut off the exhaust gas recirculation in cold Internal combustion engine and low load. When switched off Exhaust gas recirculation reaches the exhaust gas of a connected to the exhaust gas recirculation line Cylinder in the connected to the other cylinder exhaust manifold. The problem with such a device, the division of the cylinder in two Groups is, of which a group is provided for exhaust gas recirculation, is the need for an arrangement of a valve device in the field of Exhaust manifold, where the installation conditions are very cramped. If the Is exhaust manifold is cooled, is also the implementation of the drive shaft through to solve the water jacket only with great design effort.

Aus der US 4,249,382 geht eine weitere Einrichtung als bekannt hervor, die eine Gruppe von Abgaszylindern zur Abgasrückführung heranzieht. Hier dient eine Ventileinrichtung mit zwei Ventilen zur Steuerung der Abgasströme. In einer Ausführung wird ein Rückschlagventil verwendet, um den Eintritt von Verbrennungsluft aus der Luftzufuhrleitung in die Abgasrückführleitung zu verhindern.From US 4,249,382 a further device as known, which is a group of exhaust cylinders for exhaust gas recirculation draws. Here is a valve device with two valves for controlling the exhaust gas flows. In one embodiment, a Check valve used to prevent the entry of combustion air out of the Prevent air supply line in the exhaust gas recirculation line.

In der DE 19521573 A1 ist eine aufgeladene Brennkraftmaschine mit Abgasrückführung dargestellt, die in der Abgasrückführleitung eine Rückschlagklappe und außerdem ein Ventil zur Abschaltung der Abgasrückführung enthält. Das rückgeführte Abgas wird einer Abgassammelleitung entnommen, an die alle Zylinder der Brennkraftmaschine angeschlossen sind. Nachteil dieser Ausführung ist, dass die Abgaszusammensetzung des rückgeführten Abgases nicht optimal eingestellt werden kann, da eine zylinderindividuelle Regelung zur Beeinflussung der Abgasqualität des rückgeführten Abgases nicht möglich ist.In DE 19521573 A1 is a supercharged internal combustion engine with exhaust gas recirculation represented in the exhaust gas recirculation line, a check valve and also a Contains valve for switching off exhaust gas recirculation. The recirculated exhaust gas is a Taken off exhaust manifold, to which all cylinders of the internal combustion engine are connected. Disadvantage of this design is that the exhaust gas composition of recirculated exhaust gas can not be optimally adjusted because a cylinder-individual Control to influence the exhaust gas quality of the recirculated exhaust gas not possible is.

Der Erfindung liegt das Problem zugrunde, für Brennkraftmaschinen mit zwei Gruppen von Zylindern, von denen eine Gruppe ("Spenderzylinder") das Abgas für die Abgasrückführung bereitstellt, eine Ventileinrichtung für die Abgasrückführung anzugeben, die im Bereich der Abgassammelleitung geringen konstruktiven Aufwand erfordert.The invention is based on the problem for internal combustion engines with two groups of Cylinders, of which one group ("donor cylinder") the exhaust gas for exhaust gas recirculation provides an exhaust gas recirculation valve device, which is in the range of Exhaust manifold requires little design effort.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Ein vorzugsweise als Klappe mit einer Rückstellfeder ausgebildetes Rückschlagventil teilt das Abgassammelrohr in zwei Abschnitte. Die Integration eines Rückschlagventils ohne Steuerung in der Abgassammelleitung bereitet auch bei begrenzten Platzverhältnissen keine konstruktiven Probleme. Die Steuerung der zurückgeführten Abgasströme wird durch ein steuerbares Ventil in der Abgasrückführleitung vorgenommen. Die Anordnung eines steuerbaren Ventils samt Antriebswelle und Stellmotor in der Abgasrückführleitung bereitet dort aufgrund der dort zur Verfügung stehenden Platzverhältnisse keinerlei Probleme. Auf diese Weise wird eine hinsichtlich konstruktivem Aufwand und Kosten günstige Lösung erreicht.This object is solved by the characterizing features of claim 1. One preferably designed as a flap with a return spring check valve divides the Exhaust manifold in two sections. The integration of a check valve without Control in the exhaust manifold prepares even in limited space no design problems. The control of the recirculated exhaust gas streams is made by a controllable valve in the exhaust gas recirculation line. The order a controllable valve including drive shaft and servomotor in the exhaust gas recirculation line there prepares because of the space available there any Problems. In this way, one in terms of design effort and costs achieved favorable solution.

Die Erfindung wird anhand eines dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Figur 1
ein Systemschaubild einer Brennkraftmaschine mit separater Gruppe von Zylindern für die Abgasrückführung;
Figur 2a
einen Abschnitt der Abgasleitung, in dem eine mit zwei Klappen ausgebildete Ventileinrichtung in Stellung bei Abgasrückführung dargestellt ist;
Figur 2b
einen Abschnitt der Abgasleitung entsprechend Figur 2a mit Stellung der Klappen bei abgeschalteter Abgasrückführung.
The invention will be explained in more detail with reference to an illustrated embodiment. Show it:
FIG. 1
a system diagram of an internal combustion engine with a separate group of cylinders for exhaust gas recirculation;
FIG. 2a
a portion of the exhaust pipe in which a two-flap valve device is shown in position in exhaust gas recirculation;
FIG. 2b
a section of the exhaust pipe according to Figure 2a with position of the flaps with the exhaust gas recirculation switched off.

Figur 1 zeigt ein Systemschaubild einer Brennkraftmaschine 1 mit dem Leitungssystem für Verbrennungsluft und Abgas. Die Verbrennungsluft wird den Zylindern 2,3 der Brennkraftmaschine 1 über eine Ansaugleitung 4 zugeführt, die den Verdichter eines Abgasturboladers enthält. Das Abgas der Zylinder 2,3 wird in einer Abgassammelleitung 5 aufgenommen, die die Turbine 6 des Abgasturboladers beinhaltet. Die Abgassammelleitung 5 besitzt im weiteren einen Anschluss an eine Abgasrückführleitung 7, die mit der Ansaugleitung 4 verbunden ist. Zur Kühlung der Luft- und Abgasströme können Wärmetauscher 8,9 vorgesehen sein. Die Abgasrückführung wird durch Ventile 10 und 11 gesteuert, die in der Abgassammelleitung 5 und in der Abgasrückführleitung 7 angeordnet sind. Das als Rückschlagventil ausgebildete Ventil 10, das in der Abgassammelleitung 5 zwischen den Anschlüssen der Zylindergruppen 2 und 3 liegt, separiert zwei Bereiche der Abgassammelleitung 5.FIG. 1 shows a system diagram of an internal combustion engine 1 with the line system for Combustion air and exhaust gas. The combustion air is the cylinders 2.3 of the Internal combustion engine 1 is supplied via a suction line 4, which is the compressor of a Exhaust gas turbocharger contains. The exhaust gas of the cylinder 2,3 is in an exhaust manifold 5 received, which includes the turbine 6 of the exhaust gas turbocharger. The Exhaust manifold 5 further has a connection to an exhaust gas recirculation line 7, which is connected to the intake pipe 4. For cooling the air and exhaust gas flows may be provided 8.9 heat exchanger. The exhaust gas recirculation is through valves 10 and 11 controlled in the exhaust manifold 5 and in the exhaust gas recirculation line 7 are arranged. Designed as a check valve valve 10, which in the Exhaust manifold 5 between the terminals of the cylinder groups 2 and 3, separates two areas of the exhaust manifold 5.

In den Figuren 2a und 2b ist das Abgasleitungssystem jeweils im Bereich der aus den Ventilen 10 und 11 bestehenden Ventileinrichtung für die Abgasrückführung gezeigt, wobei in der Stellung der Ventile nach Figur 2a eine Abgasrückführung des Abgases des Zylinders 3 erfolgt und in der Stellung der Ventile nach Figur 2b die Abgasrückführung abgestellt ist, so dass das Abgas aller Zylinder 2,3 zur Turbine 6 gelangt.In Figures 2a and 2b, the exhaust pipe system in each case in the region of the Valves 10 and 11 existing exhaust gas recirculation valve device shown wherein in the position of the valves of Figure 2a an exhaust gas recirculation of the exhaust gas of Cylinder 3 takes place and in the position of the valves of Figure 2b, the exhaust gas recirculation is turned off, so that the exhaust gas of all cylinders 2,3 reaches the turbine 6.

Die Ventile 10 und 11 sind als Klappen ausgebildet. Das in der Abgasrückführleitung 7 angeordnete Ventil 11 ist in Abhängigkeit von Motorbetriebsparametern in eine geöffnete Stellung für Abgasrückführung (Figur 2a) und eine geschlossene Stellung (Figur 2b) schaltbar, in der keine Abgasrückführung erfolgt. Aufgrund der Rückschlagfunktion des Ventils 10 kommt nur das Abgas des Zylinders 3 zur Rückführung. The valves 10 and 11 are designed as flaps. The in the exhaust gas recirculation line 7th arranged valve 11 is in response to engine operating parameters in an open Position for exhaust gas recirculation (FIG. 2a) and a closed position (FIG. 2b) switchable, in which no exhaust gas recirculation takes place. Due to the kickback function of Valve 10 comes only the exhaust gas of the cylinder 3 for feedback.

Das in der Abgassammelleitung 5 angeordnete Ventil 10 wird bei Abgasrückführung aufgrund der sich einstellenden Druckverhältnisse und durch die Wirkung einer Rückstellfeder 12 in geschlossener Stellung im Anschlag an einem Widerlager 13 gehalten, wie in Figur 2a dargestellt. Die Rückstellkraft der Feder wird so gewählt, dass in Abstimmung mit den bestehenden Druckverhältnissen die gewünschten Öffnungs- und Schließbedingungen erfüllt werden. Ein Dämpfungselement, das an der Klappe angreift, verhindert durch Druckstöße angeregte Flatterbewegungen. Die Richtung der Abgasströme ist durch Pfeile 14,15 und 16 gezeigt.The arranged in the exhaust manifold 5 valve 10 is exhaust gas recirculation due to the adjusting pressure conditions and the effect of a Return spring 12 held in the closed position in abutment against an abutment 13, as shown in Figure 2a. The restoring force of the spring is chosen so that in Coordinate with the existing pressure conditions the desired opening and Closing conditions are met. A damping element that acts on the flap, prevents flutter motions caused by pressure surges. The direction of the Exhaust gas streams are shown by arrows 14,15 and 16.

Wenn zur Abschaltung der Abgasrückführung das Ventil 11 in geschlossene Stellung entsprechend Figur 2b gebracht wird, öffnet das Ventil 10 aufgrund der sich in den vom Ventil 10 separierten Bereichen der Abgassammelleitung einstellenden Druckdifferenz selbsttätig und es entsteht ein Durchgang, über den das Abgas des Zylinders 3 in den mit der Turbine 6 verbundenen Abschnitt der Abgassammelleitung überströmt. Das gesamte Abgas aller Zylinder gelangt zur Turbine 6.When the exhaust gas recirculation shutdown, the valve 11 in the closed position is brought in accordance with Figure 2b, the valve 10 opens due to the in the vom Valve 10 separated areas of the exhaust manifold adjusting pressure difference automatically and it creates a passage through which the exhaust gas of the cylinder 3 in the with the turbine 6 connected portion of the exhaust manifold overflows. The entire Exhaust gas from all cylinders reaches the turbine 6.

Um die rückgeführte Abgasrate zu variieren, ist es auch möglich, das Ventil 11 in der Abgasrückführleitung 7 nur zu einem Teil zu öffnen, so dass nur ein Teil des Abgases des Zylinders 3 (Spenderzylinder) in die Ansaugleitung zurückgeführt wird, während der andere Teil zusammen mit dem Abgas der übrigen Zylinder 2 zur Abgasturbine gelangt. Der Abgasdruck in der Abgasrückführleitung ist unter anderem abhängig von der Öffnung des Ventils 11. Je größer die Öffnung des Ventils 11 ist, um so geringer ist der aufgrund des Rückstaus bewirkte Abgasdruck in der Abgasrückführleitung, um so größer wird auch die zurückgeführte Abgasmenge sein. Die Stellung des Ventils 10 hängt ab von der Stellung des Ventils 11.In order to vary the recirculated exhaust gas rate, it is also possible, the valve 11 in the Exhaust gas recirculation line 7 to open only a part, so that only a part of the exhaust gas of the Cylinder 3 (donor cylinder) is returned to the suction line while the other Part passes together with the exhaust gas of the remaining cylinder 2 to the exhaust gas turbine. Of the Exhaust gas pressure in the exhaust gas recirculation line is dependent inter alia on the opening of the Valve 11. The larger the opening of the valve 11, the lower is the due to the Backpressure caused exhaust pressure in the exhaust gas recirculation line, the larger is the be recycled exhaust gas. The position of the valve 10 depends on the position of the valve 11.

Die dargestellte Ventileinrichtung aus den Ventilen 10 und 11 zur Abgasrückführung erlaubt im Bereich der Abgassammelleitung 7 eine konstruktiv einfache Ausführung, weil aufgrund der Anordnung einer steuerbaren Ventileinrichtung in der Abgasrückführleitung 7 in der Abgassammelleitung 5 lediglich ein selbsttätiges Rückschlagventil genügt. Das als federbelastete Klappe ausgebildete Rückschlagventil ist auch in engen Einbauverhältnissen ohne aufwendige konstruktive Maßnahmen darstellbar. Im Falle einer gekühlten Abgassammelleitung entfällt insbesondere auch die aufwendige Durchführung der notwendigen Antriebswelle durch den Wassermantel hindurch.The valve device shown from the valves 10 and 11 for exhaust gas recirculation allowed in the exhaust manifold 7 a structurally simple design, because due to the arrangement of a controllable valve device in the exhaust gas recirculation line 7 in the exhaust manifold 5 only an automatic check valve is sufficient. That as spring-loaded flap trained check valve is also in tight Installation conditions can be displayed without complex design measures. In case of a cooled exhaust manifold especially eliminates the costly implementation the necessary drive shaft through the water jacket.

Die Verwendung einer selbsttätigen Klappe in der Abgassammelleitung hat im weiteren den Vorteil, dass sie als Sicherheitseinrichtung für den Fall dienen kann, dass das Abgas des Spenderzylinders, z. B. bei einem Defekt des Ventils 11, bei Störungen in der Steuerung, bei Verschmutzung bzw. Verstopfung des Abgaskühlers oder sonstigen Bauteilen in der Rückführleitung dennoch abströmen kann.The use of an automatic flap in the exhaust manifold has in the further the advantage that it can serve as a safety device in the event that the exhaust gas the donor cylinder, z. B. in case of a defect of the valve 11, in case of disturbances in the Control, in case of contamination or blockage of the exhaust gas cooler or other Nevertheless, components in the return line can escape.

Claims (3)

  1. Device for exhaust-gas recirculation in a multicylinder internal combustion engine, having an intake line (4) for feeding combustion air to the cylinders, and having an exhaust-gas collection line (5) for discharging exhaust gas from the cylinders of the internal combustion engine, a valve (10) being provided in the exhaust-gas collection line (5) between two regions of the exhaust-gas collection line (5) which are assigned to two groups of cylinders (2, 3), and it being possible to connect one region of the exhaust-gas collection line (5) to an exhaust-gas recirculation line (7) which opens into the intake line (4), characterized in that the valve (10) which is arranged in the exhaust-gas collection line (5) is an automatic non-return valve which, as a function of the prevailing pressure difference, permits exhaust gas to flow over out of that region of the exhaust-gas collection line (5) which is connected to the exhaust-gas recirculation line (7) into the other region of the exhaust-gas collection line (5) which is delimited by the valve (10), but the said valve prevents flow in the reverse direction by closing, and in that, furthermore, a controllable valve (11) is arranged in the exhaust-gas recirculation line (7), which valve (11) controls a flow cross section of the exhaust-gas recirculation line (7).
  2. Device according to Claim 1, characterized in that the non-return valve is configured as a flap valve which is loaded by a restoring spring (12) in the closing direction as far as the stop on an abutment (13).
  3. Device according to Claim 1 or 2, characterized in that the controllable valve (11) controls the flow cross section in the exhaust-gas recirculation line (7) as a function of engine operating parameters.
EP00991170A 1999-12-17 2000-12-12 Exhaust gas recirculation device Expired - Lifetime EP1238194B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19960998A DE19960998C1 (en) 1999-12-17 1999-12-17 Exhaust gas recycling device, with self-operating no-return valve in exhaust gas collector line
DE19960998 1999-12-17
PCT/EP2000/012573 WO2001044650A1 (en) 1999-12-17 2000-12-12 Exhaust gas recirculation device

Publications (2)

Publication Number Publication Date
EP1238194A1 EP1238194A1 (en) 2002-09-11
EP1238194B1 true EP1238194B1 (en) 2005-03-09

Family

ID=7933103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00991170A Expired - Lifetime EP1238194B1 (en) 1999-12-17 2000-12-12 Exhaust gas recirculation device

Country Status (6)

Country Link
US (1) US6752132B2 (en)
EP (1) EP1238194B1 (en)
JP (1) JP2003519311A (en)
DE (1) DE19960998C1 (en)
ES (1) ES2237493T3 (en)
WO (1) WO2001044650A1 (en)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10351546A1 (en) * 2002-12-03 2004-06-24 Behr Gmbh & Co. Kg Device for cooling of charge air and exhaust gas of especially motor vehicle with internal combustion engine has exhaust gas stream cooled by first and second heat exchanger, and charge air stream cooled by third heat exchanger
DE10327442A1 (en) * 2003-06-18 2005-01-05 Daimlerchrysler Ag Internal combustion engine with exhaust gas recirculation device and method for this purpose
DE102005024895A1 (en) * 2004-06-11 2006-01-12 Kabushiki Kaisha Toyota Jidoshokki, Kariya Inlet and exhaust device for a multi-cylinder engine
US7721541B2 (en) * 2004-11-08 2010-05-25 Southwest Research Institute Secondary internal combustion device for providing exhaust gas to EGR-equipped engine
JP2007040136A (en) * 2005-08-02 2007-02-15 Denso Corp Exhaust gas recirculation system of internal combustion engine with supercharger
US7311090B2 (en) * 2006-01-31 2007-12-25 International Engine Intellectual Property Company, Llc Engine exhaust gas passage flow orifice and method
US8091614B2 (en) * 2006-11-10 2012-01-10 International Business Machines Corporation Air/fluid cooling system
DE102006054043A1 (en) 2006-11-16 2008-05-21 Volkswagen Ag Internal combustion engine with exhaust gas recirculation
DE102007011680B4 (en) * 2007-03-09 2009-08-27 Mtu Friedrichshafen Gmbh Internal combustion engine
US8020525B2 (en) 2007-07-12 2011-09-20 Ford Global Technologies, Llc Cylinder charge temperature control for an internal combustion engine
US7801664B2 (en) * 2007-07-12 2010-09-21 Ford Global Technologies, Llc Cylinder charge temperature control for an internal combustion engine
US7779823B2 (en) * 2007-07-12 2010-08-24 Ford Global Technologies, Llc Cylinder charge temperature control for an internal combustion engine
WO2009100451A2 (en) * 2008-02-08 2009-08-13 Cummins, Inc. Apparatus, system, and method for efficiently operating an internal combustion engine utilizing exhaust gas recirculation
US8291891B2 (en) 2008-06-17 2012-10-23 Southwest Research Institute EGR system with dedicated EGR cylinders
US8752532B2 (en) * 2010-05-21 2014-06-17 Toyota Jidosha Kabushiki Kaisha Internal combustion engine and control device for internal combustion engine
US8944034B2 (en) 2011-02-11 2015-02-03 Southwest Research Institute Dedicated EGR control strategy for improved EGR distribution and engine performance
US8561599B2 (en) 2011-02-11 2013-10-22 Southwest Research Institute EGR distributor apparatus for dedicated EGR configuration
US20120260897A1 (en) * 2011-04-13 2012-10-18 GM Global Technology Operations LLC Internal Combustion Engine
US8904786B2 (en) * 2011-04-13 2014-12-09 GM Global Technology Operations LLC Internal combustion engine
US8915081B2 (en) * 2011-04-13 2014-12-23 GM Global Technology Operations LLC Internal combustion engine
US8555638B2 (en) 2011-04-14 2013-10-15 Caterpillar Inc. Internal combustion engine with improved exhaust manifold
US9109545B2 (en) * 2011-07-29 2015-08-18 General Electric Company Systems and methods for controlling exhaust gas recirculation composition
DE102011117104A1 (en) 2011-10-27 2012-08-23 Mtu Friedrichshafen Gmbh Internal combustion engine comprises exhaust gas recirculation system with exhaust pipe, which is fluidically connected with internal combustion engine, where exhaust gas treatment device is fluidically connected to exhaust gas line
US20140034027A1 (en) * 2012-07-31 2014-02-06 Caterpillar Inc. Exhaust gas re-circulation system
US10012153B2 (en) 2012-08-15 2018-07-03 General Electric Company System and method for engine control
US9051903B2 (en) * 2012-08-24 2015-06-09 Caterpillar Inc. NOx emission control using large volume EGR
FR3000999A1 (en) * 2013-01-14 2014-07-18 Peugeot Citroen Automobiles Sa Combustion engine i.e. three-cylinder combustion engine, for car, has separation edge placed in front of introduction openings of exhaust gas from combustion cylinder into exhaust manifold such that wall divides exhaust gas into flows
DE102013201710B4 (en) 2013-02-01 2018-05-03 Mtu Friedrichshafen Gmbh Internal combustion engine with dispenser cylinder concept
US20140238363A1 (en) * 2013-02-26 2014-08-28 GM Global Technology Operations LLC Exhaust gas recirculation system
GB2519136B (en) * 2013-10-11 2017-09-27 Cummins Ltd Engine with turbocharger and exhaust gas recirculation system
US9926839B2 (en) * 2014-05-30 2018-03-27 Nissan Motor Co., Ltd. Internal combustion engine and method for controlling internal combustion engine
US10233809B2 (en) 2014-09-16 2019-03-19 Southwest Research Institute Apparatus and methods for exhaust gas recirculation for an internal combustion engine powered by a hydrocarbon fuel
US10125726B2 (en) 2015-02-25 2018-11-13 Southwest Research Institute Apparatus and methods for exhaust gas recirculation for an internal combustion engine utilizing at least two hydrocarbon fuels
CN104895705A (en) * 2015-04-28 2015-09-09 潍柴动力股份有限公司 Waste gas recirculating system, motor vehicle, and control method of waste gas recirculating system
US9797349B2 (en) 2015-05-21 2017-10-24 Southwest Research Institute Combined steam reformation reactions and water gas shift reactions for on-board hydrogen production in an internal combustion engine
US9657692B2 (en) 2015-09-11 2017-05-23 Southwest Research Institute Internal combustion engine utilizing two independent flow paths to a dedicated exhaust gas recirculation cylinder
US10221798B2 (en) 2015-12-01 2019-03-05 Ge Global Sourcing Llc Method and systems for airflow control
US9874193B2 (en) 2016-06-16 2018-01-23 Southwest Research Institute Dedicated exhaust gas recirculation engine fueling control
DE102016214784A1 (en) * 2016-08-09 2018-02-15 Mahle International Gmbh Valve device of an internal combustion engine
CN107489564A (en) * 2016-12-23 2017-12-19 宝沃汽车（中国）有限公司 A kind of multicylinder engine and the vehicle with the multicylinder engine
US10495035B2 (en) 2017-02-07 2019-12-03 Southwest Research Institute Dedicated exhaust gas recirculation configuration for reduced EGR and fresh air backflow

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1952573A1 (en) 1968-10-22 1970-04-23 Davy Plasties Machinery Ltd Measuring device for the deviation of a workpiece elongated in the feed direction from the feed path
US4249382A (en) * 1978-05-22 1981-02-10 Caterpillar Tractor Co. Exhaust gas recirculation system for turbo charged engines
JPS55114864A (en) * 1979-02-28 1980-09-04 Nissan Motor Co Ltd Fuel feed controller for multi-cylinder
JPS5853182B2 (en) * 1979-05-07 1983-11-28 日産自動車株式会社 Exhaust recirculation device for engine with cylinder number control
GB2093909A (en) * 1981-02-19 1982-09-08 Ford Motor Co I.C. engines operable on less than all cylinders
DE3930243A1 (en) * 1989-09-11 1991-03-14 Bosch Gmbh Robert INTERNAL COMBUSTION ENGINE
IT1269973B (en) * 1993-07-20 1997-04-16 Mtu Friedrichshafen Gmbh DEVICE TO DECREASE HARMFUL SUBSTANCES IN THE OPERATION OF MULTI-CYLINDER INTERNAL COMBUSTION ENGINES
DE19521573C2 (en) * 1995-06-14 1998-05-28 Man Nutzfahrzeuge Ag Exhaust gas recirculation on a supercharged internal combustion engine

Also Published As

Publication number Publication date
EP1238194A1 (en) 2002-09-11
US6752132B2 (en) 2004-06-22
WO2001044650A1 (en) 2001-06-21
JP2003519311A (en) 2003-06-17
DE19960998C1 (en) 2001-02-15
US20020189598A1 (en) 2002-12-19
ES2237493T3 (en) 2005-08-01

Similar Documents

Publication Publication Date Title
EP1238194B1 (en) Exhaust gas recirculation device
EP2097620B1 (en) Crank case ventilator
DE102009015656B4 (en) Modular EGR system, engine system, and method for cooling an EGR gas flow
DE69525773T2 (en) ARRANGEMENT FOR EXHAUST GAS RECIRCULATION IN CHARGED COMBUSTION ENGINE WITH PARALLEL SWITCHED TURBINES
EP1030050B2 (en) Exhaust gas recirculation system
DE60024776T2 (en) TURBOLADER AND EXHAUST GAS RECYCLING SYSTEM
EP1138927A2 (en) Turbocharged combustion engine with exhaust gas recirculation
DE102006054117B4 (en) Crankcase ventilation of an internal combustion engine controlled in partial and full load operation
EP2108807B1 (en) Exhaust gas recirculation device for an internal combustion engine
DE2823067A1 (en) RELIEF CONTROL FOR A TURBOCHARGER
DE102005024895A1 (en) Inlet and exhaust device for a multi-cylinder engine
DE3010787C2 (en) Internal combustion engine with cylinder deactivation in the partial load range
DE102005025434A1 (en) Emission control device for a motor
EP2305991B1 (en) Combustion engine with an exhaust gas turbocharger and an exhaust gas return system
DE3439999C1 (en) Four-stroke internal combustion engine with two exhaust turbochargers
DE102007025886B4 (en) Bypass insert for an exhaust gas recirculation cooler
AT522272A1 (en) COMBUSTION MACHINE
DE102007019089A1 (en) Exhaust gas heat exchanger, exhaust gas heat exchanger system, internal combustion engine and method for treating exhaust gases of an internal combustion engine
DE3441033A1 (en) DEVICE FOR TREATING COMBUSTION GAS AND REDUCING FUEL CONSUMPTION IN COMBUSTION ENGINES
DE202013103022U1 (en) Internal combustion engine with cylinder deactivation
DE102014215364B4 (en) Internal combustion engine
DE102008018324B4 (en) Exhaust gas recirculation system
EP2737195B1 (en) Supercharged internal combustion engine
DE102016214784A1 (en) Valve device of an internal combustion engine
DE3731991C1 (en) Supercharged internal combustion engine with a plurality of exhaust turbochargers functioning in parallel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20020228

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

RBV Designated contracting states (corrected)

Designated state(s): ES FR GB IT

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): ES FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050518

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2237493

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

ET Fr: translation filed
26N No opposition filed

Effective date: 20051212

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20071220

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20071228

Year of fee payment: 8

Ref country code: GB

Payment date: 20071218

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20071217

Year of fee payment: 8

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20081212

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081212

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20081213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081213

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081212