EP0774575B1 - Cast cylinder head for an internal combustion engine - Google Patents

Cast cylinder head for an internal combustion engine Download PDF

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Publication number
EP0774575B1
EP0774575B1 EP96115800A EP96115800A EP0774575B1 EP 0774575 B1 EP0774575 B1 EP 0774575B1 EP 96115800 A EP96115800 A EP 96115800A EP 96115800 A EP96115800 A EP 96115800A EP 0774575 B1 EP0774575 B1 EP 0774575B1
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EP
European Patent Office
Prior art keywords
cylinder head
core
oil
longitudinal
passages
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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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EP96115800A
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German (de)
French (fr)
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EP0774575A1 (en
Inventor
Michael Dohn
Eduard Zaiss
Gerhard Eisberg
Erwin Escherle
Erhard Rau
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Daimler Benz AG
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DaimlerChrysler AG
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    • 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
    • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
    • 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
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the invention relates to a cast cylinder head Multi-cylinder internal combustion engine according to the preamble of Claim 1.
  • a generic cylinder head is one Multi-cylinder internal combustion engine known.
  • the cylinder head includes blind holes arranged in the cylinder head cover to accommodate valve lash compensation elements, the Blind holes through distribution channels with a longitudinal oil channel for supplying pressure oil to the valve lash adjusters and Connect to an oil collection chamber via return openings.
  • the blind holes and the longitudinal oil channel must be in one own production process and make production more expensive of the cylinder head.
  • the cylinder head according to the invention has in the cylinder head cover arranged blind holes for receiving valve clearance compensation elements.
  • the blind holes protrude Distribution channels with one extending in the longitudinal direction of the cylinder head Longitudinal oil channel for supplying pressure oil to the valve lash adjusters in connection. Every blind hole stands via a return opening at its lower end with a Oil collection room in connection.
  • the blind holes, the Longitudinal oil channel, the distributor channels, the return openings and the Oil collection space is poured in through a pouring core. Reached this is achieved through a multifunctional core, also as an oil gallery core referred to, which comprises several core sections.
  • a basic core is used to produce the return openings and the oil collecting space.
  • a first core section connected to the base core is used for the production of blind holes.
  • a second core section connected to the first core section serves for Manufacture of the longitudinal oil channel and distribution channels.
  • the multifunctional core is over two core bearings in the lower part of the mold supported. In another embodiment, it extends between gas exchange valves and chambers in the longitudinal direction of the cylinder head a secondary air duct leading to the individual exhaust ducts has branching connectors. The secondary air duct and the connectors are through a third core section manufactured that via a core bearing with the other core sections of the multifunctional core is connected.
  • the invention simplifies the manufacture of the cylinder head reached.
  • the multifunctional core serves for simultaneous Manufacture of several elements of the cylinder head, so that both machining processes, such as drilling of the longitudinal oil channel, as well as the insertion of individual cores can.
  • This will advantageously be the secondary air duct forming core section on the chain shaft facing away Core bearing held so that the secondary air duct is separated from the others Core sections are separated and thus only a connection to Has outlet channel.
  • the core section can also additionally be connected to the core bearing in the chain case, so that the core is given greater stability. Then the secondary air duct subsequently locked on this page become.
  • the secondary air duct runs arbitrarily, advantageously but meandering, between the gas exchange channels and the chambers, so that the cooling water chamber of the cylinder head largely preserved.
  • FIG. 1 to 3 is a cylinder head 1 for one here Multi-cylinder internal combustion engine not shown in detail.
  • the cylinder head 1 comprises a one-piece casting a cylinder head base 2 and from this up to a cover separation level 3 leading longitudinal outer walls 4.5 and front outer walls 6.7.
  • the cylinder head base 2 has a combustion chamber for each cylinder 13, of which an inlet channel (not shown here), an outlet channel 14 and also not shown here Chambers for receiving a spark plug, an injection nozzle or the like go out. Pass through the inlet and outlet channels 14 the cooling water chamber 9 up to the longitudinal outer walls 4.5.
  • each blind hole 16 via a transverse distribution channel 17 with that extending in the cylinder head longitudinal direction 18 Longitudinal oil channel 12 for supplying pressure oil to the valve clearance compensation elements communicates.
  • the multifunctional core a also referred to as the oil gallery core several core sections b to d.
  • a basic core b is used for production of the oil collection chamber 11 and the return openings 19.
  • Ein first core section c connected to the base core b is used for Production of blind holes 16.
  • a second with the first Core section c connected core section d is used for production of the tubular longitudinal oil channel 12 and the core of the Longitudinal oil channel 12 stabilizing distribution channels 17.
  • the multifunctional core a is via two core bearings a ', a' 'in the lower part of the mold supported.
  • a Valve guidance becomes a defined parting plane 22 between the base core b and one necessary to form the control room 10
  • Control room core f placed, inevitably when casting forms a cast skin, which in the subsequent processing of the Spring support surface 21 at least partially from the machining tool is cut open, so that automatically an oil drain to the rest of the oil room.
  • a secondary air duct 23 approximately in a meandering shape Longitudinal cylinder head direction 18 between the gas exchange channels 14 and the chambers in such a way that the cooling water chamber 9 of the cylinder head 1 largely preserved.
  • the secondary air duct 23 each has 14 branches to the individual outlet channels Connectors 24, which in the region 25 near the valve on the Inlet channel facing side of the outlet channel 14 open.
  • the secondary air duct 23 and the connecting pieces 24 are produced by a further core section e, which has a Core bearing a 'with the other core sections b to d of the multifunctional core a is connected. Processing operations are also omitted here, like the deep hole of the secondary air duct and drilling the connectors, and inserting one Single core.
  • the core section e projects into a region 25 in the region near the valve Outlet channel core, not shown, which is recessed accordingly is.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Description

Die Erfindung bezieht sich auf einen gegossenen Zylinderkopf einer mehrzylindrigen Brennkraftmaschine gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a cast cylinder head Multi-cylinder internal combustion engine according to the preamble of Claim 1.

Aus der FR-A-2 659 692 ist ein gattungsgemäßer Zylinderkopf einer mehrzylindrigen Brennkraftmaschine bekannt. Der Zylinderkopf umfaßt in der Zylinderkopfdecke angeordnete Sacklochbohrungen zur Aufnahme von Ventilspiel-Ausgleichselementen, wobei die Sacklochbohrungen über Verteilerkanäle mit einem Längsölkanal zur Druckölversorgung der Ventilspiel-Ausgleichselemente und über Rücklauföffnungen mit einem Ölsammelraum in Verbindung stehen. Die Sacklochbohrungen und der Längsölkanal müssen in einem eigenen Arbeitsgang erzeugt werden und verteuern die Herstellung des Zylinderkopfes.From FR-A-2 659 692 a generic cylinder head is one Multi-cylinder internal combustion engine known. The cylinder head includes blind holes arranged in the cylinder head cover to accommodate valve lash compensation elements, the Blind holes through distribution channels with a longitudinal oil channel for supplying pressure oil to the valve lash adjusters and Connect to an oil collection chamber via return openings. The blind holes and the longitudinal oil channel must be in one own production process and make production more expensive of the cylinder head.

Zum allgemeinen technischen Hintergrund wird noch auf die DE 44 17 480 C1, die EP 0 416 600 A1 und die DE 43 44 356 A1 verwiesen.For general technical background reference is made to DE 44 17 480 C1, EP 0 416 600 A1 and DE 43 44 356 A1.

Es ist die Aufgabe der Erfindung einen Zylinderkopf derart auszubilden, daß eine vereinfachte und damit kostengünstigere Herstellung gewährleistet ist.It is the object of the invention to design a cylinder head in such a way that a simplified and therefore cheaper production is guaranteed.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruchs 1 gegebenen Merkmale gelöst.This object is achieved by the in the characteristic of Features given claim 1 solved.

Der erfindungsgemäße Zylinderkopf besitzt in der Zylinderkopfdecke angeordnete Sacklochbohrungen zur Aufnahme von Ventilspiel-Ausgleichselementen. Die Sacklochbohrungen stehen über Verteilerkanäle mit einem sich in Zylinderkopflängsrichtung erstreckenden Längsölkanal zur Druckölversorgung der Ventilspiel-Ausgleichselemente in Verbindung. Jede Sacklochbohrung steht über eine an ihrem unteren Ende liegende Rücklauföffnung mit einem Ölsammelraum in Verbindung. Die Sacklochbohrungen, der Längsölkanal, die Verteilerkanäle, die Rücklauföffnungen und der Ölsammelraum werden durch einen Gießkern eingegossen. Erreicht wird dies durch einen Multifunktionalkern, auch als Ölgaleriekern bezeichnet, der mehrere Kernteilstücke umfaßt. Ein Grundkern dient zur Herstellung der Rücklauföffnungen und des Ölsammelraumes. Ein erstes mit dem Grundkern verbundenes Kernteilstück dient zur Herstellung der Sacklochbohrungen. Ein zweites mit dem ersten Kernteilstück verbundenes Kernteilstück dient zur Herstellung des Längsölkanals und der Verteilerkanäle. Der Multifunktionalkern ist über zwei Kernlager im Kokillenunterteil abgestützt. In einem weiteren Ausführungsbeispiel erstreckt sich zwischen Gaswechselventilen und Kammern in Zylinderkopflängsrichtung ein Sekundärluftkanal, der zu den einzelnen Auslaßkanälen abzweigende Verbindungsstücke besitzt. Der Sekundärluftkanal und die Verbindungsstücke werden durch ein drittes Kernteilstück hergestellt, das über ein Kernlager mit den anderen Kernteilstücken des Multifunktionalkernes verbunden ist.The cylinder head according to the invention has in the cylinder head cover arranged blind holes for receiving valve clearance compensation elements. The blind holes protrude Distribution channels with one extending in the longitudinal direction of the cylinder head Longitudinal oil channel for supplying pressure oil to the valve lash adjusters in connection. Every blind hole stands via a return opening at its lower end with a Oil collection room in connection. The blind holes, the Longitudinal oil channel, the distributor channels, the return openings and the Oil collection space is poured in through a pouring core. Reached this is achieved through a multifunctional core, also as an oil gallery core referred to, which comprises several core sections. A basic core is used to produce the return openings and the oil collecting space. A first core section connected to the base core is used for the production of blind holes. A second core section connected to the first core section serves for Manufacture of the longitudinal oil channel and distribution channels. The multifunctional core is over two core bearings in the lower part of the mold supported. In another embodiment, it extends between gas exchange valves and chambers in the longitudinal direction of the cylinder head a secondary air duct leading to the individual exhaust ducts has branching connectors. The secondary air duct and the connectors are through a third core section manufactured that via a core bearing with the other core sections of the multifunctional core is connected.

Durch die Erfindung wird eine vereinfachte Herstellung des Zylinderkopfes erreicht. Der Multifunktionalkern dient zur gleichzeitigen Herstellung mehrerer Elemente des Zylinderkopfes, so daß sowohl Bearbeitungsverfahren, wie beispielsweise das Bohren des Längsölkanals, als auch die Einlage von Einzelkernen entfallen können. Vorteilhafterweise wird das den Sekundärluftkanal ausbildende Kernteilstück an dem dem Kettenschacht abgewandten Kernlager gehalten, so daß der Sekundärluftkanal von den anderen Kernteilstücken abgetrennt ist und somit nur eine Verbindung zum Auslaßkanal besitzt. Das Kernteilstück kann aber auch noch zusätzlich an das Kernlager im Kettenkasten angebunden sein, so daß der Kern eine größere Stabilität erhält. Dann muß der Sekundärluftkanal auf dieser Seite allerdings nachträglich verschlossen werden. Der Sekundärluftkanal verläuft beliebig, vorteilhafterweise aber mäanderförmig, zwischen den Gaswechselkanälen und den Kammern, so daß der Kühlwasserraum des Zylinderkopfes weitgehend erhalten bleibt.The invention simplifies the manufacture of the cylinder head reached. The multifunctional core serves for simultaneous Manufacture of several elements of the cylinder head, so that both machining processes, such as drilling of the longitudinal oil channel, as well as the insertion of individual cores can. This will advantageously be the secondary air duct forming core section on the chain shaft facing away Core bearing held so that the secondary air duct is separated from the others Core sections are separated and thus only a connection to Has outlet channel. The core section can also additionally be connected to the core bearing in the chain case, so that the core is given greater stability. Then the secondary air duct subsequently locked on this page become. The secondary air duct runs arbitrarily, advantageously but meandering, between the gas exchange channels and the chambers, so that the cooling water chamber of the cylinder head largely preserved.

Weitere Ausgestaltungen und Vorteile gehen aus der Beschreibung hervor.Further configurations and advantages go from the description forth.

Ein Ausführungsbeispiel der Erfindung ist im folgenden in drei Zeichnungen mit weiteren Einzelheiten näher erläutert, und zwar zeigen:

Fig. 1
einen Querschnitt durch einen erfindungsgemäßen Zylinderkopf,
Fig. 2
den Zylinderkopf aus Fig. 1 im Längsschnitt und
Fig. 3
einen Teilschnitt durch den Zylinderkopf aus Fig. 1 und 2.
An embodiment of the invention is explained in more detail in the following in three drawings, showing:
Fig. 1
3 shows a cross section through a cylinder head according to the invention,
Fig. 2
the cylinder head of FIG. 1 in longitudinal section and
Fig. 3
2 shows a partial section through the cylinder head from FIGS. 1 and 2.

In den Figuren 1 bis 3 ist ein Zylinderkopf 1 für eine hier nicht näher dargestellte mehrzylindrige Brennkraftmaschine gezeigt. Der Zylinderkopf 1 umfaßt ein einteiliges Gußstück mit einem Zylinderkopfboden 2 und die von diesem nach oben bis zu einer Deckeltrennebene 3 abführenden längsseitigen Außenwände 4,5 und stirnseitigen Außenwände 6,7.In Figures 1 to 3 is a cylinder head 1 for one here Multi-cylinder internal combustion engine not shown in detail. The cylinder head 1 comprises a one-piece casting a cylinder head base 2 and from this up to a cover separation level 3 leading longitudinal outer walls 4.5 and front outer walls 6.7.

Im Zylinderkopf 1 ist mit Abstand zu dem Zylinderkopfboden 2 eine Zylinderkopfdecke 8 eingegossen, durch die ein Kühlwasserraum 9 von einem darüberliegenden Steuerraum 10 abgetrennt ist. In der Zylinderkopfdecke 8 ist ein Ölsammelraum 11 angeordnet über dem wiederum ein Längsölkanal 12 verläuft.In the cylinder head 1 there is a distance from the cylinder head base 2 Cylinder head cover 8 cast through which a cooling water chamber 9 is separated from an overlying control room 10. In the cylinder head cover 8 is an oil collecting space 11 arranged above which in turn runs a longitudinal oil channel 12.

Der Zylinderkopfboden 2 besitzt für jeden Zylinder einen Brennraum 13, von dem jeweils ein hier nicht dargestellter Einlaßkanal, ein Auslaßkanal 14 und hier ebenfalls nicht dargestellte Kammern zur Aufnahme einer Zündkerze, einer Einspritzdüse oder dergleichen ausgehen. Der Einlaß- und der Auslaßkanal 14 durchsetzen den Kühlwasserraum 9 bis zu den längsseitigen Außenwänden 4,5.The cylinder head base 2 has a combustion chamber for each cylinder 13, of which an inlet channel (not shown here), an outlet channel 14 and also not shown here Chambers for receiving a spark plug, an injection nozzle or the like go out. Pass through the inlet and outlet channels 14 the cooling water chamber 9 up to the longitudinal outer walls 4.5.

In der Zylinderkopfdecke 8 sind symmetrisch zur Längsmittelebene 15 V-förmig und versetzt zueinander stehende Sacklochbohrungen 16 zur Aufnahme von Ventilspiel-Ausgleichselementen angeordnet, wobei jede Sacklochbohrung 16 über einen querverlaufenden Verteilerkanal 17 mit dem sich in Zylinderkopflängsrichtung 18 erstreckenden Längsölkanal 12 zur Druckölversorgung der Ventilspiel-Ausgleichselemente in Verbindung steht. Um den Abfluß des Drucköls aus der Sacklochbohrung 16 zu ermöglichen, steht jede Sacklochbohrung 16 an ihrem unteren Ende über eine Rücklauföffnung 19 mit dem Ölsammelraum 11 in Verbindung durch den das öl aus dem Zylinderkopf 1 über einen Kettenschacht 20 und durch spezielle hier nicht dargestellte Ölrücklaufbohrungen in die Ölwanne der Brennkraftmaschine zurückfließen kann.In the cylinder head cover 8 are symmetrical to the longitudinal median plane 15 V-shaped and offset blind holes 16 arranged to accommodate valve clearance compensation elements, each blind hole 16 via a transverse distribution channel 17 with that extending in the cylinder head longitudinal direction 18 Longitudinal oil channel 12 for supplying pressure oil to the valve clearance compensation elements communicates. To drain the To allow pressure oil from the blind hole 16, each stands Blind hole 16 at its lower end via a return opening 19 with the oil collection chamber 11 in connection through which the oil from the cylinder head 1 via a chain shaft 20 and through special oil return holes not shown here in the oil pan the internal combustion engine can flow back.

Gemäß der Erfindung werden die Sacklochbohrungen 16, der Längsölkanal 12, die Verteilerkanäle 17, die Rücklauföffnungen 19 und der Ölsammelraum 11 durch einen einzigen Gießkern, der als Multifunkt:ionalkern a ausgebildet ist, ausgeformt. Das Bohren des Längsölkanals, der Verteilerkanäle und der Rücklauföffnungen als auch die Einlage von Einzelkernen entfallen damit. Lediglich die vorgegossenen Sacklochbohrungen 16 zur Aufnahme von Ventilspiel-Ausgleichselementen werden anschließend fertig gebohrt. Der Multifunktionalkern a, auch als Ölgaleriekern bezeichnet, umfaßt mehrere Kernteilstücke b bis d. Ein Grundkern b dient zur Herstellung des Ölsammelraumes 11 und der Rücklauföffnungen 19. Ein erstes mit dem Grundkern b verbundenes Kernteilstück c dient zur Herstellung der Sacklochbohrungen 16. Ein zweites mit dem ersten Kernteilstück c verbundenes Kernteilstück d dient zur Herstellung des rohrförmigen Längsölkanals 12 und der den Kern des Längsölkanals 12 stabilisierenden Verteilerkanäle 17. Der Multifunktionalkern a ist über zwei Kernlager a', a'' im Kokillenunterteil abgestützt. Im Bereich einer Federauflagefläche 21 einer Ventilführung wird eine definierte Trennebene 22 zwischen Grundkern b und einem zur Bildung des Steuerraumes 10 notwendigen Steuerraumkern f gelegt, in der sich beim Gießen zwangsläufig eine Gußhaut bildet, die bei der anschließenden Bearbeitung der Federauflagefläche 21 vom Bearbeitungswerkzeug zumindest teilweise aufgeschnitten wird, so daß hierdurch automatisch ein Ölablauf zum übrigen Ölraum hergestellt wird.According to the invention, the blind holes 16, the longitudinal oil channel 12, the distribution channels 17, the return openings 19 and the oil collection chamber 11 through a single pouring core, which as a multifunction: ionic core a is formed. Drilling the Longitudinal oil channel, the distribution channels and the return openings as there is also no need to insert individual cores. Only that pre-cast blind holes 16 for receiving valve lash compensation elements are then drilled to completion. The multifunctional core a, also referred to as the oil gallery core several core sections b to d. A basic core b is used for production of the oil collection chamber 11 and the return openings 19. Ein first core section c connected to the base core b is used for Production of blind holes 16. A second with the first Core section c connected core section d is used for production of the tubular longitudinal oil channel 12 and the core of the Longitudinal oil channel 12 stabilizing distribution channels 17. The multifunctional core a is via two core bearings a ', a' 'in the lower part of the mold supported. In the area of a spring support surface 21 a Valve guidance becomes a defined parting plane 22 between the base core b and one necessary to form the control room 10 Control room core f placed, inevitably when casting forms a cast skin, which in the subsequent processing of the Spring support surface 21 at least partially from the machining tool is cut open, so that automatically an oil drain to the rest of the oil room.

In einer weiteren Ausgestaltung der Erfindung verläuft im Kühlwasserraum 9 ein Sekundärluftkanal 23 in etwa mäanderförmig in Zylinderkopflängsrichtung 18 zwischen den Gaswechselkanälen 14 und den Kammern und zwar so, daß der Kühlwasserraum 9 des Zylinderkopfes 1 weitgehend erhalten bleibt. Der Sekundärluftkanal 23 besitzt jeweils zu den einzelnen Auslaßkanälen 14 abzweigende Verbindungsstücke 24, die im ventilnahen Bereich 25 an der dem Einlaßkanal zugewandten Seite des Auslaßkanals 14 münden.In a further embodiment of the invention runs in the cooling water room 9 a secondary air duct 23 approximately in a meandering shape Longitudinal cylinder head direction 18 between the gas exchange channels 14 and the chambers in such a way that the cooling water chamber 9 of the cylinder head 1 largely preserved. The secondary air duct 23 each has 14 branches to the individual outlet channels Connectors 24, which in the region 25 near the valve on the Inlet channel facing side of the outlet channel 14 open.

Der Sekundärluftkanal 23 und die Verbindungsstücke 24 werden durch ein weiteres Kernteilstück e hergestellt, das über ein Kernlager a' mit den anderen Kernteilstücken b bis d des Multifunktionalkernes a verbunden ist. Hier entfallen ebenfalls Bearbeitungsvorgänge, wie die Tieflochbohrung des Sekundärluftkanals und das Bohren der Verbindungsstücke, und das Einlegen eines Einzelkernes.The secondary air duct 23 and the connecting pieces 24 are produced by a further core section e, which has a Core bearing a 'with the other core sections b to d of the multifunctional core a is connected. Processing operations are also omitted here, like the deep hole of the secondary air duct and drilling the connectors, and inserting one Single core.

Das Kernteilstück e ragt im ventilnahen Bereich 25 in einen hier nicht dargestellten Auslaßkanal-Kern, der dazu entsprechend ausgespart ist. Die beim Gießen zwischen Auslaßkanal 14 und Verbindungsstück 24 entstandene Gußhaut liegt dadurch innerhalb des Auslaßkanals 14. Der Bereich 25 des Auslaßkanals 14 wird üblicherweise durch Formfräser bearbeitet, wodurch in vorteilhafter Weise gleichzeitig die Gußhaut entfernt wird.The core section e projects into a region 25 in the region near the valve Outlet channel core, not shown, which is recessed accordingly is. When casting between the outlet duct 14 and the connector 24 resulting cast skin lies within the Outlet channel 14. The area 25 of the outlet channel 14 is usually machined by form cutters, making it more advantageous Way the cast skin is removed at the same time.

Claims (3)

  1. Cast cylinder head (1) of a multi-cylinder internal combustion engine having exchange passages (14) arranged in the coolant water chamber (9) and compartments for ignition plugs or injection nozzles and having blind bores (16) arranged in the cylinder head cover (8) for receiving valve clearance-compensating elements, each blind bore (16) being connected to a longitudinal oil passage (12) extending in the cylinder head longitudinal direction (18) for supplying the valve clearance-compensating elements with pressurised oil and the bottom end of each blind bore (16) additionally being connected to a return orifice (19) to an oil catchment chamber (11), the blind bores (16) and the longitudinal oil passage (12) being connected by distributor passages (17), and the oil catchment chamber (11) being formed by a casting core (a)
    characterised in that
    the blind bores (16), the longitudinal oil passage (12), the distributor passages (17) and the return orifices (19) are also formed by casting cores (b, c, d) which are designed to make up a single casting core (a) in conjunction with the casting core (b) of the oil catchment chamber (11).
  2. Cast cylinder head as claimed in claim 1,
    characterised in that
    the cylinder head (1) has a secondary air passage (23) which is formed by a core part-piece (e) of the casting core (a).
  3. Cast cylinder head as claimed in claim 2,
    characterised in that
    the secondary air passage (23) formed by the core part-piece (e) extends in the cylinder head longitudinal direction (18) between the exchange passages (14) and the chambers in a more or less meandering design and the core part-piece (e) has connecting pieces (24) branching off respectively to the individual outlet passages (14).
EP96115800A 1995-11-15 1996-10-02 Cast cylinder head for an internal combustion engine Expired - Lifetime EP0774575B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542495 1995-11-15
DE19542495A DE19542495C5 (en) 1995-11-15 1995-11-15 Cast cylinder head of a multi-cylinder internal combustion engine

Publications (2)

Publication Number Publication Date
EP0774575A1 EP0774575A1 (en) 1997-05-21
EP0774575B1 true EP0774575B1 (en) 2001-05-16

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EP96115800A Expired - Lifetime EP0774575B1 (en) 1995-11-15 1996-10-02 Cast cylinder head for an internal combustion engine

Country Status (4)

Country Link
US (1) US5730095A (en)
EP (1) EP0774575B1 (en)
DE (2) DE19542495C5 (en)
ES (1) ES2158206T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19542495C5 (en) * 1995-11-15 2005-08-04 Daimlerchrysler Ag Cast cylinder head of a multi-cylinder internal combustion engine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19723342C1 (en) * 1997-06-04 1998-09-03 Vaw Mandl & Berger Gmbh Cylinder head with casting core for oilduct fabrication in multi-cylinder IC engine
DE10339653A1 (en) * 2003-08-28 2005-03-24 Deutz Ag Casting core minimized cylinder head
JP2007309136A (en) * 2006-05-16 2007-11-29 Toyota Motor Corp Internal combustion engine
JP4625425B2 (en) * 2006-05-22 2011-02-02 本田技研工業株式会社 Cylinder head oil passage structure
DE102008059832B4 (en) * 2008-12-01 2012-05-24 Audi Ag Method for casting a cylinder head
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DE19542495C1 (en) 1997-01-16
ES2158206T3 (en) 2001-09-01
DE59606903D1 (en) 2001-06-21
DE19542495C5 (en) 2005-08-04
US5730095A (en) 1998-03-24
EP0774575A1 (en) 1997-05-21

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