EP1532359B1 - Cylinder head for a water-cooled multi-cylinder internal combustion engine - Google Patents

Cylinder head for a water-cooled multi-cylinder internal combustion engine Download PDF

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Publication number
EP1532359B1
EP1532359B1 EP03735626A EP03735626A EP1532359B1 EP 1532359 B1 EP1532359 B1 EP 1532359B1 EP 03735626 A EP03735626 A EP 03735626A EP 03735626 A EP03735626 A EP 03735626A EP 1532359 B1 EP1532359 B1 EP 1532359B1
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EP
European Patent Office
Prior art keywords
cylinder head
cylinder
cooling
spark plug
coolant
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP03735626A
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German (de)
French (fr)
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EP1532359A1 (en
Inventor
Peter Krotky
Albrecht Reustle
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication of EP1532359A1 publication Critical patent/EP1532359A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F01P3/14—Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 

Definitions

  • the invention relates to a cylinder head for a water-cooled multi-cylinder internal combustion engine according to the features of the preamble of claim 1.
  • the cooling circuit is shown and described for a multi-cylinder internal combustion engine in which about 2/3 of the coolant flow circulated to the engine cooling circulated through the cylinder head housing for needs-based coolant flow distribution. So that all cylinder head units are cooled uniformly, it is further provided that the cylinder head housing is traversed transversely by the coolant with respect to the longitudinal axis of the cylinder bank. These are measures to be able to dissipate the resulting during combustion high jet heat from the cylinder head housing. From the DE 199 43 001 C1 It is also known to cool a hot spot in the cylinder head by means of an additional channel leading to the hot spot. Furthermore, from the DE 35 16 453 C2 it is known to direct the flow of cooling liquid in the direction of a spark plug dome by means of ribs arranged in the cylinder head.
  • the object of the invention is to provide further measures to effectively and effectively cool the high-temperature-loaded areas of the cylinder head.
  • a temperature load in the cylinder head adapted cooling is achieved within the cylinder head of a multi-cylinder internal combustion engine, in which a main coolant flow between the two exhaust valves of the valve motor is guided in the direction of the spark plug, while the edge zones of the cylinder head cooling chambers are supplied by secondary cooling flows.
  • the coolant is passed in an advantageous manner in the region of the high temperature loaded spark plug dome. Characterized in that the cross sections of the two guide ribs are formed differently, a cross flow is generated behind the guide ribs, which counteracts the formation of so-called. Totwasser Theen and contributes to the fact that even in the intake valves sufficient coolant supply is present.
  • the diameter of the outflow openings is of different sizes.
  • a cooling channel is additionally provided on the inflow side in the cylinder head, which leads coolant directly to the hot spot.
  • the geometry of a water jacket, hereinafter referred to as the cylinder head cooling chamber 2, a cylinder for a multi-cylinder internal combustion engine, as for example in the DE 100 21 525 A1 is described.
  • the cylinder head cooling space 2 of each cylinder is supplied with cooling water via two inlet openings 4 and 6 provided in the cylinder head housing.
  • two outflow openings 8 and 10 are provided, via which the coolant heated by the cylinder head flows to the suction side of the water pump, not shown, of the internal combustion engine.
  • a centrally provided in the cylinder head cooling chamber 2 opening 16 forms the receptacle or the dome for the spark plug of the respective cylinder.
  • a centrally provided in the cylinder head cooling chamber 2 opening 16 forms the receptacle or the dome for the spark plug of the respective cylinder.
  • two rib-shaped recesses 18 and 20 are provided, which are formed in the cylinder head housing as positive to two guide ribs 18 'and 20'.
  • the cross sections of the two guide ribs 18 'and 20' are formed differently strong; the function of this embodiment will be explained later in more detail.
  • a recess 22 for the two intake valves of the cylinder head follows behind the two recesses 18, 20 and the central opening 16.
  • the inflow side of the cylinder head cooling chamber 2 is formed so that a main cooling flow Q 2 and Q 3 between the two exhaust valves (recess 12, 14) in the direction of the spark plug center (central opening 16) is guided via the inlet openings 4 and 6, while in the left and the right edge region of the cylinder head cooling chamber 2, a secondary cooling flow Q 1 and Q 4 is formed, which is guided over the two outflow openings 4 and 6 on the outside of the two recesses 24 and 26 in the direction of the ribs 18 'and 20' along.
  • the cooling streams Q 2 and Q 3 are, as shown by the arrows, due to the Zündkerzendomes in the direction of the guide ribs 18 'and 20' directed where they meet with the cooling streams Q1 and Q4 together.
  • the fact that the cross section of the guide rib 18 'with respect to the guide rib 20' is smaller and that the diameter of the discharge opening 8 is greater than the diameter of the discharge opening 10, in the region of the inlet valves (see recess 22) generates a transverse flow Q transverse to an optimal cooling of the cylinder head housing also contributes in this area, thus preventing the formation of so-called dead water areas.
  • coolant flowing through the cooling channel Q 5 directs coolant directly to a hot spot in the cylinder head housing, which is formed in the wall region of the combustion chamber at the level of the spark plug dome, the opening or the thread for receiving the spark plug encloses.

Abstract

The cylinder head has two exhaust and induction valves for each cylinder, a cylinder head cooling cavity (2) with inflow (4) and outflow (6) apertures for the coolant and a receiving aperture (16) for a spark plug. A main cooling flow (Q2, Q3) in the cylinder head cavity runs between the two exhaust valve recesses (12, 14) towards the receiving aperture for the spark plug. At the two edge regions of the inflow side, there are two adjacent cooling flows (Q1, Q4).

Description

Die Erfindung betrifft einen Zylinderkopf für eine wassergekühlte mehrzylindrige Brennkraftmaschine gemäß den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a cylinder head for a water-cooled multi-cylinder internal combustion engine according to the features of the preamble of claim 1.

In der DE 100 21 525 A ist der Kühlkreislauf für eine mehrzylindrige Brennkraftmaschine dargestellt und beschrieben, bei dem zur bedarfsgerechten Kühlmittelstromverteilung ca. 2/3 des zur Motorkühlung in Umlauf gebrachten Kühlmittelstromes durch das Zylinderkopfgehäuse geführt wird. Damit alle Zylinderkopfeinheiten gleichmäßig gekühlt werden, ist weiterhin vorgesehen, dass das Zylinderkopfgehäuse vom Kühlmittel - bezogen auf die Längsachse der Zylinderbank- quer durchströmt ist. Dies sind Maßnahmen, um die bei der Verbrennung entstehende hohe Strahlwärme aus dem Zylinderkopfgehäuse abführen zu können. Aus der DE 199 43 001 C1 ist weiterhin bekannt, eine Heißstelle im Zylinderkopf durch einen auf die Heißstelle ausgerichteten Kühlwasser führenden Zusatzkanal zu kühlen. Des weiteren ist aus der DE 35 16 453 C2 bekannt, durch im Zylinderkopf angeordnete Rippen den Kühlflüssigkeitsstrom in Richtung eines Zündkerzendomes zu lenken.In the DE 100 21 525 A the cooling circuit is shown and described for a multi-cylinder internal combustion engine in which about 2/3 of the coolant flow circulated to the engine cooling circulated through the cylinder head housing for needs-based coolant flow distribution. So that all cylinder head units are cooled uniformly, it is further provided that the cylinder head housing is traversed transversely by the coolant with respect to the longitudinal axis of the cylinder bank. These are measures to be able to dissipate the resulting during combustion high jet heat from the cylinder head housing. From the DE 199 43 001 C1 It is also known to cool a hot spot in the cylinder head by means of an additional channel leading to the hot spot. Furthermore, from the DE 35 16 453 C2 it is known to direct the flow of cooling liquid in the direction of a spark plug dome by means of ribs arranged in the cylinder head.

Schließlich zeigt die US 6,427,642 B1 einen Zylinderkopf für eine wassergekühlte Brennkraftmaschine, bei dem ein Kühlmittelhauptstrom zwischen die beiden Auslassventile des Vierventilmotors in Richtung des Zündkerzendomes geführt wird, während die Randzonen der Zylinderkopf-Kühlräume durch Nebenkühlströme versorgt sind. Ein Teil des Kühlmittelhauptstroms wird durch Leit- und Sperrippen auf eine Heißstelle im Zylinderkopf ausgerichtet, die damit gezielt gekühlt wird.Finally, the shows US 6,427,642 B1 a cylinder head for a water-cooled internal combustion engine, in which a main coolant flow between the two exhaust valves of the four-valve engine is guided in the direction of the spark plug dome, while the edge zones of the cylinder head cooling chambers are supplied by secondary cooling streams. Part of the coolant main stream is aligned by guiding and locking ribs on a hot spot in the cylinder head, which is thus selectively cooled.

Aufgabe der Erfindung ist es, weitere Maßnahmen vorzusehen, um gezielt die hochtemperaturbelasteten Bereiche des Zylinderkopfes effektiv und gleichmäßig zu kühlen.The object of the invention is to provide further measures to effectively and effectively cool the high-temperature-loaded areas of the cylinder head.

Die Aufgabe wird erfindungsgemäß durch die im Anspruch 1 angegebenen Merkmale gelöst.The object is achieved by the features specified in claim 1.

Durch die im Anspruch 1 angegebenen Merkmale wird innerhalb des Zylinderkopfes einer mehrzylindrigen Brennkraftmaschine eine der Temperaturbelastung im Zylinderkopf angepasste Kühlung erreicht, bei der ein Kühlmittelhauptstrom zwischen die beiden Auslassventile des Verventilmotors in Richtung des Zündkerzendomes geführt wird, während die Randzonen der Zylinderkopf-Kühlräume durch Nebenkühlströme versorgt sind. Durch die auf der Höhe der Aufnahmeöffnung für die Zündkerze vorgesehenen Leitrippen wird das Kühlmittel auf vorteilhafte Art und Weise in den Bereich des hochtemperaturbelasteten Zündkerzendomes geleitet. Dadurch, dass die Querschnitte der beiden Leitrippen unterschiedlich ausgebildet sind, wird hinter den Leitrippen eine Querströmung erzeugt, die der Ausbildung von sog. Totwassergebieten entgegenwirkt und dazu beiträgt, dass auch im Bereich der Einlassventile eine ausreichende Kühlmittelversorgung vorhanden ist. Alternativ oder ergänzend hierzu wird zur Erzeugung einer Querströmung im - in Strömungsrichtung des Kühlmittels gesehen - hinteren Bereich der Einlassventile vorgeschlagen, dass der Durchmesser der Abströmöffnungen unterschiedlich groß ausgebildet ist.By the features specified in claim 1, a temperature load in the cylinder head adapted cooling is achieved within the cylinder head of a multi-cylinder internal combustion engine, in which a main coolant flow between the two exhaust valves of the valve motor is guided in the direction of the spark plug, while the edge zones of the cylinder head cooling chambers are supplied by secondary cooling flows. By provided at the height of the receiving opening for the spark plug guide ribs, the coolant is passed in an advantageous manner in the region of the high temperature loaded spark plug dome. Characterized in that the cross sections of the two guide ribs are formed differently, a cross flow is generated behind the guide ribs, which counteracts the formation of so-called. Totwassergebieten and contributes to the fact that even in the intake valves sufficient coolant supply is present. As an alternative or in addition to this, in order to generate a transverse flow in the rear region of the intake valves, viewed in the direction of flow of the coolant, it is proposed that the diameter of the outflow openings is of different sizes.

im einzigen Unteranspruch ist eine weitere vorteilhafte Ausgestaltung und Verbesserung des erfindungsgemäßen Zylinderkopfes für eine wassergekühlte mehrzylindrige Brennkraftmaschine enthalten.in the single dependent claim, a further advantageous embodiment and improvement of the cylinder head according to the invention for a water-cooled multi-cylinder internal combustion engine is included.

Zur Unterstützung der im Zündkerzendombereich vorhandenen Heißstelle ist auf der Einströmseite im Zylinderkopf zusätzlich ein Kühlkanal vorgesehen, der auf direktem Weg Kühlmittel zur Heißstelle führt.To support the existing in Zündkerzendombereich hot spot a cooling channel is additionally provided on the inflow side in the cylinder head, which leads coolant directly to the hot spot.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend näher erläutert.An embodiment of the invention is illustrated in the drawing and will be explained in more detail below.

Es zeigen:

Fig. 1
einen geometrische Abbildung eines Wassermantels im Zylinderkopfgehäuse einer Brennkraftmaschine,
Fig. 2
einen Schnitt entlang der Linie II - II in Fig. 1,
Fig. 3
eine Seitenansicht des Wassermantels in Pfeilrichtung A in Fig. 1 und
Fig. 4
eine Ansicht auf den Wassermantel aus Richtung B in Fig. 3.
Show it:
Fig. 1
a geometric illustration of a water jacket in the cylinder head housing of an internal combustion engine,
Fig. 2
a section along the line II - II in Fig. 1 .
Fig. 3
a side view of the water jacket in the direction of arrow A in Fig. 1 and
Fig. 4
a view of the water jacket from direction B in Fig. 3 ,

Beschreibung des AusführungsbeispielsDescription of the embodiment

In den Figuren ist die Geometrie eines Wassermantels, im folgenden als Zylinderkopfkühlraum 2 bezeichnet, eines Zylinders für eine mehrzylindrige Brennkraftmaschine, wie sie beispielsweise in der DE 100 21 525 A1 beschrieben ist, dargestellt. Der Zylinderkopfkühlraum 2 jedes Zylinders wird über zwei im Zylinderkopfgehäuse vorgesehene Einströmöffnungen 4 und 6 mit Kühlwasser versorgt.
Auf der gegenüberliegenden Seite des Zylinderkopfkühlraumes 2 sind zwei Ausströmöffnungen 8 und 10 vorgesehen, über die das vom Zylinderkopf erwärmte Kühlmittel zur Saugseite der nicht dargestellten Wasserpumpe der Brennkraftmaschine abströmt. In der geometrischen Abbildung des Zylinderkopfkühlraumes 2 sind zwei Ausnehmungen 12 und 14 für die beiden Einlassventile der Brennkraftmaschine erkennbar; eine zentral im Zylinderkopfkühlraum 2 vorgesehene Öffnung 16 bildet die Aufnahme bzw. den Dom für die Zündkerze des betreffenden Zylinders. Links und rechts von der zentralen Öffnung 16 sind zwei rippenförmige Ausnehmungen 18 und 20 vorhanden, die im Zylinderkopfgehäuse als Positiv dazu als zwei Leitrippen 18' und 20' ausgebildet sind. Wie in Fig. 2 erkennbar, sind die Querschnitte der beiden Leitrippen 18' und 20' unterschiedlich stark ausgebildet; die Funktion dieser Ausgestaltung wird später noch näher erläutert. In Strömungsrichtung des Kühlmittels gesehen, schließt sich hinter den beiden Ausnehmungen 18, 20 und der zentralen Öffnung 16 eine Ausnehmung 22 für die beiden Einlassventile des Zylinderkopfes an.In the figures, the geometry of a water jacket, hereinafter referred to as the cylinder head cooling chamber 2, a cylinder for a multi-cylinder internal combustion engine, as for example in the DE 100 21 525 A1 is described. The cylinder head cooling space 2 of each cylinder is supplied with cooling water via two inlet openings 4 and 6 provided in the cylinder head housing.
On the opposite side of the cylinder head cooling chamber 2, two outflow openings 8 and 10 are provided, via which the coolant heated by the cylinder head flows to the suction side of the water pump, not shown, of the internal combustion engine. In the geometric illustration of the cylinder head cooling space 2, two recesses 12 and 14 for the two intake valves of the internal combustion engine can be seen; a centrally provided in the cylinder head cooling chamber 2 opening 16 forms the receptacle or the dome for the spark plug of the respective cylinder. Left and right of the central opening 16 are two rib-shaped recesses 18 and 20 are provided, which are formed in the cylinder head housing as positive to two guide ribs 18 'and 20'. As in Fig. 2 recognizable, the cross sections of the two guide ribs 18 'and 20' are formed differently strong; the function of this embodiment will be explained later in more detail. When viewed in the flow direction of the coolant, a recess 22 for the two intake valves of the cylinder head follows behind the two recesses 18, 20 and the central opening 16.

Auf der Einströmseite des Kühlmittels sind im Zylinderkopfkühlraum 2 zwei weitere Aussparungen 24 und 26 sichtbar, deren Positiv zwei im Zylinderkopfgehäuse angeordnete Aluminiumstege bilden. Eine zwischen den beiden Einströmöffnungen 4, 6 und zwischen den beiden Ausnehmungen 12, 14 im Zylinderkopfgehäuse verlaufende Bohrung 28 dient der direkten Zufuhr von Kühlmittel zu einer Heißstelle, die vom Brennraum des Zylinderkopfgehäuses erzeugt, im Bereich des Zündkerzendomes (Wandung der Zündkerzenaufnahme) ausgebildet ist.On the inflow side of the coolant 2, two further recesses 24 and 26 are visible in the cylinder head cooling space, the positive form two arranged in the cylinder head housing aluminum webs. An extending between the two inflow openings 4, 6 and between the two recesses 12, 14 in the cylinder head housing Bore 28 is used for the direct supply of coolant to a hot spot, which generates from the combustion chamber of the cylinder head housing, in the region of the spark plug dome (wall of the spark plug holder) is formed.

Die Einströmseite des Zylinderkopfkühlraumes 2 ist so ausgebildet, dass über die Einströmöffnungen 4 und 6 ein Hauptkühlstrom Q2 und Q3 zwischen den beiden Auslassventilen (Ausnehmung 12, 14) in Richtung des Zündkerzendomes (zentrale Öffnung 16) geführt wird, während im jeweils linken und rechten Randbereich des Zylinderkopfkühlraumes 2 ein Nebenkühlstrom Q1 und Q4 ausgebildet ist, der über die beiden Ausströmöffnungen 4 und 6 auf der Außenseite der beiden Ausnehmungen 24 und 26 in Richtung der Rippen 18' und 20' entlang geführt ist. Die Kühlströme Q2 und Q3 werden, wie anhand der Pfeile dargestellt, aufgrund des Zündkerzendomes in Richtung der Leitrippen 18' und 20' gelenkt, wo sie mit den Kühlströmen Q1 und Q4 zusammen treffen. Dadurch, dass der Querschnitt der Leitrippe 18' gegenüber der Leitrippe 20' kleiner ist und dass der Durchmesser der Abströmöffnung 8 größer ist als der Durchmesser der Abströmöffnung 10, wird im Bereich der Einlassventile (siehe Ausnehmung 22) eine Querströmung Qquer erzeugt, die zu einer optimalen Kühlung des Zylinderkopfgehäuses auch in diesem Bereich beiträgtund damit die Ausbildung von sogenannten Totwassergebieten verhindert.The inflow side of the cylinder head cooling chamber 2 is formed so that a main cooling flow Q 2 and Q 3 between the two exhaust valves (recess 12, 14) in the direction of the spark plug center (central opening 16) is guided via the inlet openings 4 and 6, while in the left and the right edge region of the cylinder head cooling chamber 2, a secondary cooling flow Q 1 and Q 4 is formed, which is guided over the two outflow openings 4 and 6 on the outside of the two recesses 24 and 26 in the direction of the ribs 18 'and 20' along. The cooling streams Q 2 and Q 3 are, as shown by the arrows, due to the Zündkerzendomes in the direction of the guide ribs 18 'and 20' directed where they meet with the cooling streams Q1 and Q4 together. The fact that the cross section of the guide rib 18 'with respect to the guide rib 20' is smaller and that the diameter of the discharge opening 8 is greater than the diameter of the discharge opening 10, in the region of the inlet valves (see recess 22) generates a transverse flow Q transverse to an optimal cooling of the cylinder head housing also contributes in this area, thus preventing the formation of so-called dead water areas.

Zusätzlich zu diesen Vorkehrungen wird durch den vom Kühlkanal 28 erzeugten - Kühlstrom Q5 Kühlmittel auf direktem Weg zu einer Heißstelle im Zylinderkopfgehäuse geführt, die im Wandbereich des Brennraums auf der Höhe des Zündkerzendomes ausgebildet ist, der die Öffnung bzw. das Gewinde zur Aufnahme der Zündkerze umschließt.In addition to these provisions, coolant flowing through the cooling channel Q 5 directs coolant directly to a hot spot in the cylinder head housing, which is formed in the wall region of the combustion chamber at the level of the spark plug dome, the opening or the thread for receiving the spark plug encloses.

Claims (2)

  1. Cylinder head for a water-cooled multi-cylinder internal combustion engine, having two inlet valves and two outlet valves per cylinder, having a cylinder head cooling chamber with inflow and outflow openings for the coolant, and having a receiving opening, which is arranged centrally in relation to the cylinder head cooling chamber of a cylinder, for a spark plug, wherein on the inflow side (supply flow openings 4, 6), a main cooling flow (Q2, Q3) runs in the cylinder head cooling chamber (2) between the two outlet valves (recess 12, 14) in the direction of the receiving opening (16) for the spark plug, while two secondary cooling flows (Q1, Q4) are provided at the two edge regions of the inflow side, characterized in that, to generate a transverse flow, at least one of the following features is provided:
    - at the level of the receiving opening (16) for the spark plug, guide ribs (18', 20') are provided to the sides of the opening, the cross sections of which guide ribs (18', 20') are of different sizes;
    - two outflow openings (8, 10) of different diameter are formed on the outflow side of the cylinder head cooling chamber (2).
  2. Cylinder head according to Claim 1, characterized in that a cooling duct (28) is additionally provided on the inflow side, which cooling duct (28) conducts coolant on a direct path to a hot point in the cylinder head housing.
EP03735626A 2002-08-16 2003-06-14 Cylinder head for a water-cooled multi-cylinder internal combustion engine Expired - Lifetime EP1532359B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10237664 2002-08-16
DE10237664A DE10237664A1 (en) 2002-08-16 2002-08-16 Cylinder head for water-cooled multi-cylinder internal combustion engine has main cooling flow on inflow side between two exhaust valves
PCT/EP2003/006307 WO2004022961A1 (en) 2002-08-16 2003-06-14 Cylinder head for a water-cooled multi-cylinder internal combustion engine

Publications (2)

Publication Number Publication Date
EP1532359A1 EP1532359A1 (en) 2005-05-25
EP1532359B1 true EP1532359B1 (en) 2010-01-06

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EP03735626A Expired - Lifetime EP1532359B1 (en) 2002-08-16 2003-06-14 Cylinder head for a water-cooled multi-cylinder internal combustion engine

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US (1) US6883472B2 (en)
EP (1) EP1532359B1 (en)
JP (1) JP2005535835A (en)
AT (1) ATE454548T1 (en)
DE (2) DE10237664A1 (en)
WO (1) WO2004022961A1 (en)

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DE102004015134A1 (en) 2004-03-27 2005-10-13 Dr.Ing.H.C. F. Porsche Ag Water-cooled cylinder head for a multi-cylinder internal combustion engine
US7164292B2 (en) * 2004-06-12 2007-01-16 Rambus Inc. Reducing electrical noise during bus turnaround in signal transfer systems
WO2006116788A2 (en) 2005-05-03 2006-11-09 Avl List Gmbh Exhaust system for an internal combustion engine
AT501229B1 (en) * 2005-05-03 2006-11-15 Avl List Gmbh Exhaust system for internal combustion engine has first and second exhaust pipes, in whose opening area, uniting first and second exhaust pipes span angle at reference points of inner wall of exhaust pipes
AT502089B1 (en) * 2005-06-23 2007-07-15 Man Nutzfahrzeuge Ag CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE
DE102007012907A1 (en) * 2007-03-19 2008-09-25 Bayerische Motoren Werke Aktiengesellschaft Cylinder head for a liquid-cooled internal combustion engine
DE102009008237B4 (en) * 2009-02-10 2021-01-21 Audi Ag Internal combustion engine with separate coolant spaces in the cylinder head
AT506473B1 (en) * 2009-04-23 2010-12-15 Avl List Gmbh CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE
US8539929B2 (en) 2009-11-18 2013-09-24 Harley-Davidson Motor Company Cylinder head cooling system
DE102010041105A1 (en) * 2010-09-21 2012-03-22 Bayerische Motoren Werke Aktiengesellschaft Coolant jacket for a liquid-cooled cylinder head
GB2511136B (en) 2013-02-26 2019-12-04 Mclaren Automotive Ltd Engine cooling
DE102016216360B4 (en) 2016-08-30 2023-01-26 Bayerische Motoren Werke Aktiengesellschaft Cylinder head for an internal combustion engine
JP2018131921A (en) * 2017-02-13 2018-08-23 ヤマハ発動機株式会社 Water cooled SOHC engine

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DE3516453A1 (en) 1985-05-08 1986-11-13 Audi AG, 8070 Ingolstadt LIQUID-COOLED CYLINDER HEAD
JPH0719106A (en) * 1993-06-30 1995-01-20 Yamaha Motor Co Ltd Cooling structure for four-cycle engine
DE19608576C1 (en) * 1996-03-06 1997-06-19 Daimler Benz Ag Liquid cooled motor cylinder head
DE19943003C1 (en) * 1999-09-09 2000-11-09 Porsche Ag Cylinder head for water-cooled internal combustion engine has control mechanism operating next to hot spot in cooling channel causing cross-flow of cooling water in cylinder head
DE19943001C1 (en) * 1999-09-09 2000-10-26 Porsche Ag Water-cooled motor cylinder head has a unit in the coolant flow channel for an additional coolant flow at the known cylinder head hot spots
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AT5301U1 (en) * 2001-01-29 2002-05-27 Avl List Gmbh CYLINDER HEAD FOR MULTIPLE CYLINDERS

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Publication number Publication date
US20040177818A1 (en) 2004-09-16
EP1532359A1 (en) 2005-05-25
ATE454548T1 (en) 2010-01-15
DE10237664A1 (en) 2004-02-19
US6883472B2 (en) 2005-04-26
JP2005535835A (en) 2005-11-24
DE50312321D1 (en) 2010-02-25
WO2004022961A1 (en) 2004-03-18

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