DE19929449A1 - Exhaust gas recirculation line for internal combustion engines - Google Patents
Exhaust gas recirculation line for internal combustion enginesInfo
- Publication number
- DE19929449A1 DE19929449A1 DE19929449A DE19929449A DE19929449A1 DE 19929449 A1 DE19929449 A1 DE 19929449A1 DE 19929449 A DE19929449 A DE 19929449A DE 19929449 A DE19929449 A DE 19929449A DE 19929449 A1 DE19929449 A1 DE 19929449A1
- Authority
- DE
- Germany
- Prior art keywords
- exhaust gas
- gas recirculation
- recirculation line
- line
- internal combustion
- 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.)
- Withdrawn
Links
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
- F02M26/52—Systems for actuating EGR valves
- F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on 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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
-
- 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
- F02M26/40—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with timing means in the recirculation passage, e.g. cyclically operating valves or regenerators; with arrangements involving pressure pulsations
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)
Abstract
Die Erfindung bezieht sich auf eine Abgasrückführleitung für Brennkraftmaschinen. Bei der Abgasrückführung an Brennkraftmaschinen für Fahrzeuge bereiten die Raumprobleme Schwierigkeiten. Einerseits benötigt die Abgasrückführleitung zusätzlichen Bauraum und andererseits bereiten die Temperaturprobleme in dem zusätzlich beengten Bauraum Sorgen. Erfindungsgemäß wird daher vorgeschlagen, die Abgasrückführleitung in einem der stirnseitigen Zylinderköpfe anzuordnen, derart, daß die Abgasrückführleitung den Kühlwasserraum quer zur Längsrichtung der Brennkraftmaschine durchdringt. Das rückzuführende Abgas gelangt also von der Abgasleitung durch die vom Kühlwasser umströmte Abgasrückführleitung zur Ladeluftleitung. Dadurch wird eine eigene Abgasrückführleitung eingespart, das Abgas wird gekühlt und es wird jegliche Abstrahlung von Wärme in den umgebenden Raum vermieden, so daß evtl. Brandgefahr durch Wärmestau ausgeschlossen werden kann.The invention relates to an exhaust gas recirculation line for internal combustion engines. The space problems present difficulties in exhaust gas recirculation on internal combustion engines for vehicles. On the one hand, the exhaust gas recirculation line requires additional installation space and, on the other hand, the temperature problems in the additionally restricted installation space cause concern. According to the invention, it is therefore proposed to arrange the exhaust gas recirculation line in one of the end cylinder heads, such that the exhaust gas recirculation line penetrates the cooling water space transversely to the longitudinal direction of the internal combustion engine. The exhaust gas to be returned thus arrives from the exhaust gas line through the exhaust gas recirculation line around which the cooling water flows to the charge air line. This saves a separate exhaust gas recirculation line, the exhaust gas is cooled and any radiation of heat into the surrounding space is avoided, so that a possible fire hazard due to heat build-up can be excluded.
Description
Die Erfindung bezieht sich auf eine Abgasrückführleitung für Brennkraftmaschinen gemäß dem Gattungsbegriff des Patentanspruches 1.The invention relates to an exhaust gas recirculation line for internal combustion engines according to the preamble of claim 1.
Um Teile des Abgases von der Abgasleitung in die Ladeluftleitung zurückzuführen ist es üblich, eine Abgasrückführleitung vorzusehen, welche die Abgasleitung quer zur Längsachse der Brennkraftmaschine vor einem der stirnseitigen Zylinderköpfe mit der Ladeluftleitung verbindet. Eine derartige Lösung hat den Nachteil, daß an einer der Stirnseiten der Brennkraftmaschine zusätzlicher Bauraum beansprucht ist. Ferner muß die Abgasrückführleitung zur Vermeidung von Überhitzung benachbarter Bauteile iso liert oder abgeschirmt werden. Dies erfordert einen erheblichen baulichen und kosten mäßigen Aufwand.To return parts of the exhaust gas from the exhaust pipe to the charge air pipe it is common to provide an exhaust gas recirculation line which crosses the exhaust line Longitudinal axis of the internal combustion engine in front of one of the front cylinder heads with the Charge air line connects. Such a solution has the disadvantage that one of the End faces of the internal combustion engine additional space is required. Furthermore, must the exhaust gas recirculation line iso to avoid overheating of neighboring components be shielded or shielded. This requires considerable construction and costs moderate effort.
Der Erfindung liegt die Aufgabe zugrunde, den baulichen Mehraufwand einzusparen und benachbarte Bauteile vor der Abstrahlung von Wärme zu schützen.The invention has for its object to save the additional construction effort and to protect neighboring components from the radiation of heat.
Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Pa tentanspruches 1 gelöst.According to the invention this task is characterized by the characteristic features of the Pa claim 1 solved.
Durch die Integration der Abgasrückführleitung in den Zylinderkopf wird baulicher Mehraufwand eingespart, Wärmeabstrahlung gänzlich unterbunden und zugleich eine Vorkühlung des rückzuführenden Abgases erreicht.The integration of the exhaust gas recirculation line in the cylinder head makes it more structural Additional effort saved, heat radiation completely prevented and at the same time one Pre-cooling of the exhaust gas to be recycled reached.
Eine vorteilhafte Weiterbildung der Erfindung ist Anspruch 2 zu entnehmen.An advantageous development of the invention can be found in claim 2.
Durch die Integration der Absperrklappe in die Abgasrücktährleitung wird eine raumsparende Anordnung erzielt.By integrating the butterfly valve in the exhaust gas return line, a space-saving arrangement achieved.
Weitere vorteilhafte Ausbildungen der Abgasrückführleitung können den Ansprüchen 3 bis 6 entnommen werden.Further advantageous designs of the exhaust gas recirculation line can meet the claims 3 to 6 are removed.
Ein Ausführungsbeispiel der erfindungsgemäßen Abgasrückführleitung ist an Hand von Zeichnungen dargestellt. Es zeigt:An embodiment of the exhaust gas recirculation line according to the invention is on hand represented by drawings. It shows:
Fig. 1 eine Draufsicht auf einen Zylinderkopf mit stirnseitig in den Zylinderkopf integrierter Abgasrückführleitung Fig. 1 is a plan view of a cylinder head with the exhaust gas recirculation line integrated at the end in the cylinder head
Fig. 2 ein Detail aus Fig. 1 mit Rückschlagventil Fig. 2 shows a detail from Fig. 1 with check valve
Fig. 3 einen Schnitt III-III am stirnseitigen Ende des Zylinderkopfes mit Abgasrückführleitungen Fig. 3 shows a section III-III at the front end of the cylinder head with exhaust gas recirculation lines
Fig. 1 stellt einen Zylinderkopf 1 mit Abgasrückführsystem in der Draufsicht dar. Das Abgasrückführsystem wird im wesentlichen aus einer Abgasleitung 2, einem Rückschlagventil 3, einem Abgaskühler 4 und einer hier nicht dargestellten Ladeluft leitung gebildet. Das rückzuführende Abgas durchläuft von der Abgasleitung 2 kom mend zunächst eine Absperrklappe 5, strömt anschließend durch die Abgasrück führleitung 6 und gelangt bei auftretenden Druckspitzen über das Rückschlagventil 3, und den Abgaskühler 4 in das Ladeluftrohr. Fig. 1 shows a cylinder head 1 with exhaust gas recirculation system in plan view. The exhaust gas recirculation system is essentially formed from an exhaust pipe 2 , a check valve 3 , an exhaust gas cooler 4 and a charge air line, not shown here. The exhaust gas to be recirculated passes from the exhaust pipe 2 coming first a butterfly valve 5 , then flows through the exhaust gas return line 6 and arrives at pressure peaks via the check valve 3 , and the exhaust gas cooler 4 in the charge air pipe.
Erfindungsgemäß wird nun das Abgas vom Abgasrohr 2 zum Abgaskühler 4 durch eine Abgasrückführleitung 6 geführt, die in eine der Stirnseiten des Zylinderkopfes 1 derart integriert ist, daß sie durch den Kühlwasserraum 7 geführt wird. Eine derartige Lösung hat mehrere Vorteile. Zunächst wird eine Leitung eingespart, die an der Stirnseite des Zylinderkopfes 1 zusätzlichen Bauraum beanspruchen würde. Die Leitung würde in ih re Umgebung beträchtliche Wärme abstrahlen, die beim Einbau in ein Fahrzeug zu Brandgefahr führt und isoliert werden müßte. Ein weiterer Vorteil der erfindungsge mäßen Anordnung besteht darin, daß durch den Einbau in den Kühlwasserraum 7 eine spürbare Vorkühlung des Abgases erreicht wird, so daß der eigentliche Abgaskühler 4 kleiner dimensioniert werden kann. According to the invention, the exhaust gas is now led from the exhaust pipe 2 to the exhaust gas cooler 4 through an exhaust gas recirculation line 6 , which is integrated into one of the end faces of the cylinder head 1 in such a way that it is passed through the cooling water chamber 7 . Such a solution has several advantages. First, a line is saved, which would take up additional space on the end face of the cylinder head 1 . The line would radiate considerable heat in its environment, which would cause fire hazard when installed in a vehicle and would have to be insulated. Another advantage of the arrangement according to the invention is that a noticeable pre-cooling of the exhaust gas is achieved by the installation in the cooling water chamber 7 , so that the actual exhaust gas cooler 4 can be dimensioned smaller.
Die Kühlwirkung der Abgasrückführleitung 6 kann noch dadurch gesteigert werden, daß sie abgasseitige Kühlrippen aufweist, welche die Abgasrückführleitung 6 in Längs richtung durchziehen und die zusammen mit dem Zylinderkopf 1 in Gießtechnik aus geführt werden können.The cooling effect of the exhaust gas recirculation line 6 can be further increased in that it has exhaust-side cooling fins which run through the exhaust gas recirculation line 6 in the longitudinal direction and which can be guided together with the cylinder head 1 in casting technology.
Eine weitere Möglichkeit der Verbesserung der Kühlwirkung kann erreicht werden, wenn man in die Abgasrückführleitung 6 einen Rohrbündelwärmetauscher integriert, der in seiner Bauweise dem Abgaskühler 4 entspricht. Vorteilhafterweise wird auch die Absperrklappe 5 in den Zylinderkopf 1 und die Abgasrückführleitung 6 integriert. Mit der Absperrklappe 5 kann die Abgasrückführung unterbunden, oder zusätzlich mengenmäßig geregelt werden.Another possibility of improving the cooling effect can be achieved if a tube bundle heat exchanger is integrated in the exhaust gas recirculation line 6, the heat exchanger corresponding in its construction to the exhaust gas cooler 4 . The butterfly valve 5 is advantageously also integrated into the cylinder head 1 and the exhaust gas recirculation line 6 . With the butterfly valve 5 , the exhaust gas recirculation can be prevented or additionally regulated in terms of quantity.
Ein Detail aus Fig. 1 ist in Fig. 2 gezeigt. Das Rückschlagventil 3 ist als ein Flatter ventil ausgebildet, welches öffnet, wenn über die Abgasrückführleitung 6 Abgasdruck spitzen in der durch Pfeil angedeuteten Richtung auf eine Zunge 8 treffen. Das Rück schlagventil 3 kann vorteilhafterweise eine bauliche Einheit mit einer Dichtung 10 bilden, welche zwischen Zylinderkopf 1 (Fig. 1) und dem Abgaskühler 4 angeordnet ist. Der Ausschlag der Zunge 8 kann durch einen Anschlag 9 begrenzt werden, der wiederum einen Bestandteil der Dichtung 10 bildet. Das Abgas strömt nach Passieren der Zunge 8 in den als Rohrbündelwärmetauscher ausgebildeten Abgaskühler 4 und nach erfolgter Kühlung in die Ladeluftleitung.A detail from FIG. 1 is shown in FIG. 2. The check valve 3 is designed as a flutter valve, which opens when exhaust gas pressure peaks over the exhaust gas recirculation line 6 meet a tongue 8 in the direction indicated by the arrow. The check valve 3 can advantageously form a structural unit with a seal 10 which is arranged between the cylinder head 1 ( Fig. 1) and the exhaust gas cooler 4 . The deflection of the tongue 8 can be limited by a stop 9 , which in turn forms part of the seal 10 . After passing through the tongue 8 , the exhaust gas flows into the exhaust gas cooler 4, which is designed as a tube bundle heat exchanger, and, after cooling, into the charge air line.
Einen Schnitt III-III durchs stirnseitige Ende des Zylinderkopfes 1 stellt Fig. 3 dar. Die Abgasrückführleitung 6 ist hier zweiflutig ausgeführt. Die beiden Abgasrückführ leitungen 6a, 6b durchdringen den Kühlwasserraum 7. Das Abgas wird hier bereits vorgekühlt. Eine Wärmeabstrahlung an die Umgebung ist vollkommen ausgeschlossen, eine Isolierung ist somit nicht notwendig. Zum Absperren der Abgasrückführleitungen 6a, 6b ist eine Absperrklappe 5 (Fig. 1) vorgesehen, welche durch den Stelltrieb 5a betätigbar ist.A section III-III through the front end of the cylinder head 1 is shown in FIG. 3. The exhaust gas recirculation line 6 is designed here as a double flow. The two exhaust gas recirculation lines 6 a, 6 b penetrate the cooling water chamber 7 . The exhaust gas is already pre-cooled here. Heat radiation to the environment is completely excluded, so insulation is not necessary. To shut off the exhaust gas recirculation lines 6 a, 6 b, a butterfly valve 5 ( FIG. 1) is provided, which can be actuated by the actuator 5 a.
Claims (6)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19929449A DE19929449A1 (en) | 1999-06-26 | 1999-06-26 | Exhaust gas recirculation line for internal combustion engines |
EP00102592A EP1063411B1 (en) | 1999-06-26 | 2000-02-08 | Exhaust gas recirculation duct for an internal combustion engine |
DE50007662T DE50007662D1 (en) | 1999-06-26 | 2000-02-08 | Exhaust gas recirculation line for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19929449A DE19929449A1 (en) | 1999-06-26 | 1999-06-26 | Exhaust gas recirculation line for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19929449A1 true DE19929449A1 (en) | 2000-12-28 |
Family
ID=7912742
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19929449A Withdrawn DE19929449A1 (en) | 1999-06-26 | 1999-06-26 | Exhaust gas recirculation line for internal combustion engines |
DE50007662T Expired - Lifetime DE50007662D1 (en) | 1999-06-26 | 2000-02-08 | Exhaust gas recirculation line for internal combustion engines |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE50007662T Expired - Lifetime DE50007662D1 (en) | 1999-06-26 | 2000-02-08 | Exhaust gas recirculation line for internal combustion engines |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1063411B1 (en) |
DE (2) | DE19929449A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10119484B4 (en) * | 2001-04-20 | 2018-01-04 | Bayerische Motoren Werke Aktiengesellschaft | Liquid-cooled internal combustion engine with an exhaust gas recirculation system |
NZ531314A (en) * | 2004-02-23 | 2006-10-27 | Shuttleworth Axial Motor Compa | Recirculation system for motor |
FR2906574B1 (en) * | 2006-09-29 | 2010-09-17 | Peugeot Citroen Automobiles Sa | DEVICE FOR RECIRCULATING THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE EQUIPPED WITH SUCH A DEVICE |
EP2063097A1 (en) * | 2007-11-21 | 2009-05-27 | Perkins Engines Company Limited | Internal combustion engine having exhaust gas cooling in cooling jacket |
FR2935436B1 (en) * | 2008-08-29 | 2010-09-17 | Peugeot Citroen Automobiles Sa | RECIRCULATION LOOP OF EXHAUST GAS. |
FR2944061B1 (en) * | 2009-04-07 | 2011-04-01 | Renault Sas | EXHAUST SYSTEM OF A MOTOR VEHICLE. |
FR3005997B1 (en) * | 2013-05-22 | 2015-06-19 | Peugeot Citroen Automobiles Sa | MOTOR VEHICLE ENGINE WITH EXHAUST GAS RECIRCULATION WITH IMPROVED COOLING |
US9664153B2 (en) * | 2015-03-13 | 2017-05-30 | Ford Global Technologies, Llc | Engine with exhaust gas recirculation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4310839A1 (en) * | 1993-04-02 | 1994-10-06 | Bayerische Motoren Werke Ag | Air-compressing internal combustion engine with fuel injection, especially a diesel engine with direct fuel injection |
DE19543290C2 (en) * | 1995-11-21 | 1998-07-02 | Man Nutzfahrzeuge Ag | Exhaust gas recirculation on supercharged internal combustion engines |
DE19853455A1 (en) * | 1997-11-28 | 1999-06-02 | Avl List Gmbh | Cooling system for supercharged motor |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5289721A (en) * | 1976-01-20 | 1977-07-27 | Taiho Kogyo Co Ltd | Egr controlling system made of aluminum alloy |
IT8053504V0 (en) * | 1980-09-12 | 1980-09-12 | Fiat Auto Spa | DEVICE FOR HEATING THE INTAKE MANIFOLD OF INTERNAL COMBUSTION ENGINES |
JPS5949755U (en) * | 1982-09-27 | 1984-04-02 | 本田技研工業株式会社 | internal combustion engine |
JPS6318169A (en) * | 1986-07-09 | 1988-01-26 | Honda Motor Co Ltd | Cylinder for engine with exhaust reflux passage |
DE4319380C2 (en) * | 1992-06-12 | 1998-12-17 | Avl Verbrennungskraft Messtech | Internal combustion engine with an exhaust gas turbocharger |
JPH07259653A (en) * | 1994-03-25 | 1995-10-09 | Kubota Corp | Exhaust gas recirculating device of engine |
JPH09109995A (en) * | 1995-10-18 | 1997-04-28 | Sanshin Ind Co Ltd | Engine for outboard motor |
DE19642685A1 (en) * | 1996-10-16 | 1998-04-23 | Daimler Benz Ag | Exhaust recirculation and secondary air feed device for IC engine |
AT411546B (en) * | 1998-01-15 | 2004-02-25 | Man Steyr Ag | LIQUID-COOLED INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS RECIRCULATING DEVICE AND DEVICE FOR COOLING RECYCLED EXHAUST |
-
1999
- 1999-06-26 DE DE19929449A patent/DE19929449A1/en not_active Withdrawn
-
2000
- 2000-02-08 DE DE50007662T patent/DE50007662D1/en not_active Expired - Lifetime
- 2000-02-08 EP EP00102592A patent/EP1063411B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4310839A1 (en) * | 1993-04-02 | 1994-10-06 | Bayerische Motoren Werke Ag | Air-compressing internal combustion engine with fuel injection, especially a diesel engine with direct fuel injection |
DE19543290C2 (en) * | 1995-11-21 | 1998-07-02 | Man Nutzfahrzeuge Ag | Exhaust gas recirculation on supercharged internal combustion engines |
DE19853455A1 (en) * | 1997-11-28 | 1999-06-02 | Avl List Gmbh | Cooling system for supercharged motor |
Also Published As
Publication number | Publication date |
---|---|
EP1063411B1 (en) | 2004-09-08 |
EP1063411A2 (en) | 2000-12-27 |
EP1063411A3 (en) | 2001-07-11 |
DE50007662D1 (en) | 2004-10-14 |
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Legal Events
Date | Code | Title | Description |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8139 | Disposal/non-payment of the annual fee |