DE102005050509A1 - Cylinder head for internal combustion engine has inner peripheral surface protruding out of cast material of cylinder head and valve seat ring with L-shaped or Y-shaped cross-section in cylinder head - Google Patents

Cylinder head for internal combustion engine has inner peripheral surface protruding out of cast material of cylinder head and valve seat ring with L-shaped or Y-shaped cross-section in cylinder head Download PDF

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Publication number
DE102005050509A1
DE102005050509A1 DE102005050509A DE102005050509A DE102005050509A1 DE 102005050509 A1 DE102005050509 A1 DE 102005050509A1 DE 102005050509 A DE102005050509 A DE 102005050509A DE 102005050509 A DE102005050509 A DE 102005050509A DE 102005050509 A1 DE102005050509 A1 DE 102005050509A1
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Germany
Prior art keywords
cylinder head
valve seat
seat ring
inner peripheral
peripheral surface
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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.)
Ceased
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DE102005050509A
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German (de)
Inventor
Jurji Gartner
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
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Priority to DE102005050509A priority Critical patent/DE102005050509A1/en
Publication of DE102005050509A1 publication Critical patent/DE102005050509A1/en
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The cylinder head (1) consists of a cast material with an essentially annular valve seat (2) with an inner peripheral surface that acts as a single sealing surface for a gas exchange valve. Only the inner peripheral surface (2') protrudes out of the cast material of the cylinder head and the valve seat ring with an L-shaped or Y-shaped cross-section in the cylinder head.

Description

Die Erfindung betrifft einen Zylinderkopf für eine Brennkraftmaschine mit den Merkmalen aus dem Oberbegriff des Patentanspruches 1.The The invention relates to a cylinder head for an internal combustion engine with the features of the preamble of claim 1.

Sie geht von der deutschen Offenlegungsschrift DE 39 37 402 A1 aus. In dieser sind in den Zylinderkopf einer Brennkraftmaschine eingegossene Ventilsitzringe beschrieben. Die im Gussmaterial angeordneten Bereiche der Ventilsitzringe weisen eine räumliche Struktur auf, die den Wärmeübergang in den Zylinderkopf verbessert. Die Montage der Ventilsitzringe in den Zylinderkopf ist durch das Eingießen wesentlich vereinfacht und die Gesamtsteifigkeit des Verbundes aus Zylinderkopf und Ventilsitzring ist deutlich erhöht. Um diese hohe Steifigkeit des Verbundes zu erzielen, ragen die Ventilsitzringe in der Gasströmungsrichtung deutlich in die Ansaug- und Auslasskanäle hinein.It starts from the German publication DE 39 37 402 A1 out. In this valve cast in the cylinder head of an internal combustion engine valve seat rings are described. The arranged in the casting material areas of the valve seat rings have a spatial structure that improves the heat transfer into the cylinder head. The assembly of the valve seat rings in the cylinder head is considerably simplified by the pouring and the overall stiffness of the composite of cylinder head and valve seat ring is significantly increased. In order to achieve this high rigidity of the composite, the valve seat rings in the gas flow direction protrude significantly into the intake and exhaust ducts.

Nachteilig bei dieser beschriebenen Ausgestaltung ist, dass die Frischgas-Einlass- und die Abgas-Auslasskanalkontur im Bereich der Ventilsitzringe, soweit wie der Ventilsitzring selbst in den Frischgas-Einlass- und den Abgas-Auslasskanal hinein reicht, durch den Ventilsitzring selbst bestimmt ist. Eine Nacharbeit der Kanalkontur ist, wenn überhaupt, nur mit großem Aufwand möglich.adversely in this described embodiment is that the fresh gas inlet and the Exhaust gas outlet channel contour in the area of the valve seat rings, insofar like the valve seat ring itself in the fresh gas inlet and the Exhaust gas outlet port extends, is determined by the valve seat ring itself. A rework the channel contour is, if any, only with big Effort possible.

Aufgabe der vorliegenden Erfindung ist es, die Gestaltungsmöglichkeiten der Frischgas-Einlass- oder Abgas-Auslasskanalgeometrien zu verbessern.task It is the design possibilities of the present invention the fresh gas inlet or exhaust outlet duct geometries.

Diese Aufgabe wird durch die Merkmale im kennzeichnenden Teil des Patentanspruches 1 dadurch gelöst, dass nur die Innenumfangsfläche aus dem Gussmaterial des Zylinderkopfes und der Ventilsitzring mit einem L- oder Y-förmigen Querschnitt in den Zylinderkopf ragt.These The object is achieved by the features in the characterizing part of claim 1 solved by that only the inner peripheral surface from the casting material of the cylinder head and the valve seat ring with an L or Y-shaped cross-section protrudes into the cylinder head.

Durch die erfindungsgemäße Ausgestaltung lässt sich die Einlass- bzw. Auslasskanalgeometrie bis an die Dichtfläche für das Gaswechselventil, d. h. bis an die Innenumfangsfläche des Ventilsitzringes heran frei bestimmen und in einfacher Art bearbeiten. Ferner ergeben sich auch im Brennraum im Bereich der Ventilsitzringe mehr Freiheiten bei der Geometriebestimmung. Da der Ventilsitzring erfindungsgemäß nicht in den Ansaugkanal hineinragt, ergibt sich in vorteilhafter Weise ein geringerer Verschleiß der Schnittwerkzeuge bei der Bearbeitung der Ansaug- bzw. Auslasskanäle, da die harten Ventilsitzringe nicht bearbeitet werden. Durch den L- oder Y-förmigen Querschnitt jenes Bereiches des Ventilsitzringes der in den Zylinderkopf hineinragt, resultiert eine gute Krafteinleitung der Gaswechselventilschläge vom Ventilsitzring in den Zylinderkopf.By the embodiment of the invention can be the inlet or Auslasskanalgeometrie up to the sealing surface for the gas exchange valve, d. H. to the inner peripheral surface of the valve seat ring freely determine and edit in a simple way. Further also arise more in the combustion chamber in the valve seat rings Freedoms in the geometry determination. As the valve seat ring according to the invention not protrudes into the intake, results in an advantageous manner a lower wear of the cutting tools when processing the intake and exhaust ports, as the hard valve seat rings are not to be edited. Through the L or Y-shaped Cross section of that area of the valve seat ring in the cylinder head protrudes, results in a good force introduction of gas exchange valve strokes of the valve seat ring in the cylinder head.

Die Ausgestaltung gemäß Patentanspruch 2 verbessert zum einen die Festigkeit des Ventilsitzringes im Zylinderkopf und darüber hinaus den Wärmeübergang zwischen Ventilsitzring und Zylinderkopf.The Embodiment according to claim 2 improves on the one hand the strength of the valve seat ring in the cylinder head and above in addition, the heat transfer between valve seat ring and cylinder head.

Vorzugsweise ist der Ventilsitzring gemäß Patentanspruch 3 aus einem Sintermaterial.Preferably is the valve seat ring according to claim 3 made of a sintered material.

Die Verwendung eines Leichtmetalls gemäß Patentanspruch 4 verringert das Gewicht des Zylinderkopfes.The Use of a light metal according to claim 4 reduced the weight of the cylinder head.

Im Folgenden ist die Erfindung anhand von zwei Ausführungsbeispielen in zwei Figuren näher erläutert.in the The invention is based on two embodiments in two figures explained in more detail.

1 zeigt einen Schnitt durch einen Zylinderkopf mit zwei Ausführungsbeispielen für einen erfindungsgemäßen Ventilsitzring. 1 shows a section through a cylinder head with two embodiments of a valve seat ring according to the invention.

2 zeigt die Aufsicht auf vier dreidimensional dargestellte erfindungsgemäße Ventilsitzringe in der Lage, wie sie in einen Zylinderkopf eingegossen werden. 2 shows the top view of four three-dimensionally illustrated valve seat rings according to the invention in the position as they are poured into a cylinder head.

1 zeigt einen Schnitt durch einen Zylinderkopf mit eingegossenen, erfindungsgemäß ausgestalteten Ventilsitzringen 2 in zwei Ausführungsformen. Der Zylinderkopf 1 weist zwei Gaswechselkanäle 4, einen Frischgas-Einlass- und einen Abgas-Auslasskanal auf, die von Kühlmittelkanälen 5 umgeben sind. Die Gaswechselkanäle 4 münden beide einerseits in einem Brennraum 6 des Zylinderkopfes 1. Am Übergang zwischen einem Gaswechselkanal 4 und dem Brennraum 6 ist jeweils ein, in das Zylinderkopfgussmaterial eingegossener, erfindungsgemäß ausgestalteter Ventilsitzring 2 angeordnet. Ein im Wesentlichen ringförmiger Ventilsitzring 2 mit einem größeren Durchmesser ragt mit einem L-förmigen Querschnitt in den Zylinderkopf 1. Der zweite, ebenfalls im Wesentlichen ringförmige Ventilsitzring 2, jedoch mit einem kleineren Durchmesser, ragt mit einem Y-förmigen Querschnitt in den Zylinderkopf 1. Für beide Ausführungsbeispiele gilt, dass jeweils nur eine Innenumfangsfläche 2', die als einzige Dichtfläche für ein Gaswechselventil dient, aus dem Gussmaterial des Zylinderkopfes 1 heraus ragt. 1 shows a section through a cylinder head with cast-in, inventively designed valve seat rings 2 in two embodiments. The cylinder head 1 has two gas exchange channels 4 , a fresh gas inlet and an exhaust outlet channel, which are separated by coolant channels 5 are surrounded. The gas exchange channels 4 Both lead on the one hand in a combustion chamber 6 of the cylinder head 1 , At the transition between a gas exchange channel 4 and the combustion chamber 6 is in each case a, cast in the cylinder head casting material, inventively ausgestalteter valve seat ring 2 arranged. A substantially annular valve seat ring 2 with a larger diameter protrudes with an L-shaped cross section in the cylinder head 1 , The second, also substantially annular valve seat ring 2 but with a smaller diameter, projects into the cylinder head with a Y-shaped cross section 1 , For both embodiments, that in each case only an inner peripheral surface 2 ' , which serves as a single sealing surface for a gas exchange valve, from the casting material of the cylinder head 1 sticking out.

Aufgrund der L- bzw. Y-förmigen, in den Zylinderkopf 1 hineinragenden Querschnittskontur der Ventilsitzringe 2 wird eine hervorragende mechanische Festigkeit der Ventilsitzringe 2 in dem Gussmaterial, welches vorzugsweise ein Leichtmetall ist, erzielt. Auch die Krafteinleitung vom Ventilsitzring 2 in den Zylinderkopf 1 beim Aufschlagen eines Gaswechselventils auf dem Ventilsitzring 2 ist ausgezeichnet.Due to the L- or Y-shaped, in the cylinder head 1 protruding cross-sectional contour of the valve seat rings 2 will provide excellent mechanical strength of the valve seat inserts 2 achieved in the casting material, which is preferably a light metal. Also the introduction of force from the valve seat ring 2 in the cylinder head 1 when opening a gas exchange valve on the valve seat ring 2 is excellent.

In 2, in der die gleichen Bezugszeichen für gleiche Bauteile wie in 1 gelten, ist die Aufsicht auf vier dreidimensional dargestellte Ventilsitzringe 2 dargestellt, wie sie in einem Zylinderkopf 1 eingegossen werden. Dargestellt ist die Variante, die mit einem L-förmigen Querschnitt in den Zylinderkopf 1 ragt. Eine weitere Verbesserung der mechanischen Verankerung der Ventilsitzringe 2 in dem Zylinderkopf 1 wird dadurch erzielt, dass das L- bzw. Y-förmige Ende des Ventilsitzringes 2 radial außen zumindest eine Ausnehmung 3 aufweist. Vorzugsweise weist der Ventilsitzring 2 an seinem gesamten Umfang gleichmäßig, wie aus 2 zu entnehmen ist, oder auch ungleichmäßig verteilte Ausnehmungen 3 auf. Auch eine ungleichmäßige Verteilung der Ausnehmungen 3 ist möglich. Aufgrund der Ausnehmungen 3 am radial äußeren Ende des Ventilsitzringes 2 wird neben der verbesserten mechanischen Verankerung ein hervorragender Wärmeübergang zwischen dem Ventilsitzring 2 und dem Zylinderkopf 1 erzielt. Die Ventilsitzringe 2 bestehen beispielsweise aus einem Gussmaterial, wie z. B. Grauguß, werden aber vorzugsweise aus einem Sintermetall als Sinterbauteile hergestellt.In 2 in which the same reference numbers refer to the same components as in 1 apply, the supervision is on four three-dimensionally illustrated valve seat inserts 2 shown as in a cylinder head 1 be poured. Shown is the variant, with an L-shaped cross section in the cylinder head 1 protrudes. A further improvement of the mechanical anchoring of the valve seat rings 2 in the cylinder head 1 is achieved in that the L- or Y-shaped end of the valve seat ring 2 radially outside at least one recess 3 having. Preferably, the valve seat ring 2 uniform over its entire circumference, like out 2 it can be seen, or even unevenly distributed recesses 3 on. Also an uneven distribution of the recesses 3 is possible. Because of the recesses 3 at the radially outer end of the valve seat ring 2 In addition to the improved mechanical anchoring, there is an excellent heat transfer between the valve seat ring 2 and the cylinder head 1 achieved. The valve seat rings 2 consist for example of a cast material such. As gray cast iron, but are preferably made of a sintered metal as sintered components.

Zusammengefasst ergeben sich aufgrund der erfindungsgemäßen Ausgestaltung folgende Vorteile:

  • – Uneingeschränkte Gestaltungsmöglichkeiten bei der Geometrie der Gaswechselkanäle 4;
  • – mehr Freiheit bei der Brennraumgestaltung im Bereich der Ventilsitzringe 2;
  • – geringerer Verschleiß von Schnittwerkzeugen bei der Bearbeitung der Gaswechselkanäle 4;
  • – hervorragende mechanische Verankerung des Ventilsitzringes 2 im Zylinderkopf 1;
  • – hervorragender Wärmeübergang zwischen Ventilsitzring 2 und Zylinderkopf 1;
  • – sehr gute Krafteinleitung zwischen Ventilsitzring 2 und Zylinderkopf 1 beim Aufschlagen eines Gaswechselventiles auf der Innenumfangsfläche 2'.
In summary, the following advantages result from the design according to the invention:
  • - Unlimited design possibilities in the geometry of the gas exchange channels 4 ;
  • - More freedom in the design of the combustion chamber in the area of the valve seat rings 2 ;
  • - Less wear of cutting tools when processing the gas exchange channels 4 ;
  • - Excellent mechanical anchoring of the valve seat ring 2 in the cylinder head 1 ;
  • - Excellent heat transfer between valve seat ring 2 and cylinder head 1 ;
  • - very good force transmission between valve seat ring 2 and cylinder head 1 when opening a gas exchange valve on the inner peripheral surface 2 ' ,

11
Zylinderkopfcylinder head
22
VentilsitzringValve seat ring
2'2 '
InnenumfangsflächeInner circumferential surface
33
Ausnehmungrecess
44
GaswechselkanalGas exchange channel
55
KühlmittelkanalCoolant channel
66
Brennraumcombustion chamber

Claims (4)

Zylinderkopf (1) aus einem Gussmaterial für eine Brennkraftmaschine mit einem eingegossenen, im Wesentlichen ringförmigen Ventilsitzring (2) mit einer Innenumfangsfläche (2'), die als einzige Dichtfläche für ein Gaswechselventil dient, dadurch gekennzeichnet, dass nur die Innenumfangsfläche (2') aus dem Gussmaterial und der Ventilsitzring mit einem L- oder Y-förmigen Querschnitt in den Zylinderkopf (1) ragt.Cylinder head ( 1 ) of a casting material for an internal combustion engine with a cast, substantially annular valve seat ring ( 2 ) with an inner peripheral surface ( 2 ' ), which serves as a single sealing surface for a gas exchange valve, characterized in that only the inner peripheral surface ( 2 ' ) of the casting material and the valve seat ring with an L- or Y-shaped cross section in the cylinder head ( 1 protrudes. Zylinderkopf nach Patentanspruch 1, dadurch gekennzeichnet, dass das L- oder Y-förmige Ende des Ventilsitzringes (2) radial außen zumindest eine Ausnehmung (3) aufweist.Cylinder head according to claim 1, characterized in that the L- or Y-shaped end of the valve seat ring ( 2 ) radially outwardly at least one recess ( 3 ) having. Zylinderkopf nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass der Ventilsitzring (2) aus einem Sintermaterial ist.Cylinder head according to claim 1 or 2, characterized in that the valve seat ring ( 2 ) is made of a sintered material. Zylinderkopf nach einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, dass das Gussmaterial ein Leichtmetall ist.Cylinder head according to one of the claims 1 to 3, characterized in that the casting material is a light metal is.
DE102005050509A 2005-10-21 2005-10-21 Cylinder head for internal combustion engine has inner peripheral surface protruding out of cast material of cylinder head and valve seat ring with L-shaped or Y-shaped cross-section in cylinder head Ceased DE102005050509A1 (en)

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DE102005050509A DE102005050509A1 (en) 2005-10-21 2005-10-21 Cylinder head for internal combustion engine has inner peripheral surface protruding out of cast material of cylinder head and valve seat ring with L-shaped or Y-shaped cross-section in cylinder head

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Application Number Priority Date Filing Date Title
DE102005050509A DE102005050509A1 (en) 2005-10-21 2005-10-21 Cylinder head for internal combustion engine has inner peripheral surface protruding out of cast material of cylinder head and valve seat ring with L-shaped or Y-shaped cross-section in cylinder head

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DE102005050509A1 true DE102005050509A1 (en) 2007-04-26

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DE102005050509A Ceased DE102005050509A1 (en) 2005-10-21 2005-10-21 Cylinder head for internal combustion engine has inner peripheral surface protruding out of cast material of cylinder head and valve seat ring with L-shaped or Y-shaped cross-section in cylinder head

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008015854A1 (en) 2008-03-27 2009-10-01 Volkswagen Ag Valve seat ring for sealing in cylinder head of internal combustion engine, has circular geometry and is made up of wear resistant metal, where valve seat ring is connected with another valve seat ring to ring packet by bar

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE929157C (en) * 1951-10-18 1955-06-20 Volkswagenwerk G M B H Valve seat ring on cylinder heads for internal combustion engines
DE3937402A1 (en) * 1989-11-10 1991-05-16 Porsche Ag IC-engine cylinder head valve seat - is cast in cylinder head and projection extending into cylinder head away from combustion chamber
EP0244339B1 (en) * 1986-04-28 1991-06-05 Vsi Corporation Valve seat insert
DE4301632C2 (en) * 1993-01-22 2001-08-02 Audi Ag Valve seat ring

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE929157C (en) * 1951-10-18 1955-06-20 Volkswagenwerk G M B H Valve seat ring on cylinder heads for internal combustion engines
EP0244339B1 (en) * 1986-04-28 1991-06-05 Vsi Corporation Valve seat insert
DE3937402A1 (en) * 1989-11-10 1991-05-16 Porsche Ag IC-engine cylinder head valve seat - is cast in cylinder head and projection extending into cylinder head away from combustion chamber
DE4301632C2 (en) * 1993-01-22 2001-08-02 Audi Ag Valve seat ring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008015854A1 (en) 2008-03-27 2009-10-01 Volkswagen Ag Valve seat ring for sealing in cylinder head of internal combustion engine, has circular geometry and is made up of wear resistant metal, where valve seat ring is connected with another valve seat ring to ring packet by bar

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