DE10226013A1 - Cooled valve seat for IC engine has a sealed cooling duct covered by a streamlined injected insert - Google Patents

Cooled valve seat for IC engine has a sealed cooling duct covered by a streamlined injected insert Download PDF

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Publication number
DE10226013A1
DE10226013A1 DE2002126013 DE10226013A DE10226013A1 DE 10226013 A1 DE10226013 A1 DE 10226013A1 DE 2002126013 DE2002126013 DE 2002126013 DE 10226013 A DE10226013 A DE 10226013A DE 10226013 A1 DE10226013 A1 DE 10226013A1
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DE
Germany
Prior art keywords
valve seat
sealing ring
engine
valve
cooling duct
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.)
Granted
Application number
DE2002126013
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German (de)
Other versions
DE10226013B4 (en
Inventor
Johannes Dipl.-Ing. Leweux
Dieter Dipl.-Ing. Nowak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Priority to DE10226013A priority Critical patent/DE10226013B4/en
Publication of DE10226013A1 publication Critical patent/DE10226013A1/en
Application granted granted Critical
Publication of DE10226013B4 publication Critical patent/DE10226013B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
    • F01L3/04—Coated valve members or valve-seats
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/01—Absolute values

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

A cooled valve seat for a high performance IC engine has a cooling duct (6) around the seat and connected to a coolant circuit. The duct is covered by a seal (8) held in place by a ridge located into a groove and with an injection moulded cover sleeve (10) enclosing the whole seal and forming a streamlined contour for the valve seat. The valve seals directly onto the injection moulding which can be made of a metallic alloy, e.g. using an aluminium alloy for enhanced thermal conduction.

Description

Die Erfindung betrifft einen Ventilsitz nach dem Oberbegriff von Anspruch 1.The invention relates to a valve seat according to the preamble of claim 1.

Bei Hochleistungsmotoren, insbesondere Ottomotoren, kann auf Grund der auftretenden thermischen Belastung eine Kühlung des Zylinderkopfes im Bereich der Ventilsitze erforderlich sein. Die DE 43 28 904 C2 beschreibt gattungsbildend einen gekühlten Ventilsitz. Die Kühlung erfolgt durch einen Kühlkanal, der zwischen dem Zylinderkopf und dem Ventilsitzring verläuft. Der Kühlkanal ist so ausgestaltet, dass er einerseits vom Zylinderkopf, andererseits vom Ventilsitzring begrenzt wird. Zur Regulierung der Kühlmittelmenge, die durch den Kühlkanal fließt, wird ein zusätzlicher Füllerring eingesetzt, der eine erforderliche Strömungsgeschwindigkeit gewährleistet.In the case of high-performance engines, in particular gasoline engines, cooling of the cylinder head in the region of the valve seats may be necessary due to the thermal load that occurs. The DE 43 28 904 C2 describes generically a cooled valve seat. The cooling takes place through a cooling channel, which runs between the cylinder head and the valve seat ring. The cooling channel is designed so that it is bounded on the one hand by the cylinder head, on the other hand by the valve seat ring. To regulate the amount of coolant that flows through the cooling channel, an additional filler ring is used, which ensures a required flow rate.

Eine ähnliche Anordnung beschreibt die DE 32 05 676 A1 . Zur Abdichtung des Kühlkanals wird ein Metall galvanisch in einen Spalt zwischen dem Sitzring und dem Zylinderkopf eingebracht.A similar arrangement describes the DE 32 05 676 A1 , To seal the cooling channel, a metal is galvanically introduced into a gap between the seat ring and the cylinder head.

Beide Anordnungen erfordern jedoch einen hohen Montageaufwand um die Abdichtung des Kühlkanals zu gewährleisten.Both arrangements, however, require a high installation effort to the sealing of the cooling channel to ensure.

Die Aufgabe der Erfindung besteht darin, bei geringen Montageaufwand eine verbesserte Abdichtung des Kühlkanals zu erzielen.The object of the invention is therein, with low installation costs an improved seal of the cooling channel to achieve.

Die Lösung der Aufgabe besteht in einem Ventilsitz nach Anspruch 1.The solution to the problem consists in A valve seat according to claim 1.

Der erfindungsgemäße Ventilsitz nach Anspruch 1 zeichnet sich dadurch aus, dass ein Dichtring einen Kühlkanal abdichtet, der in einem Zylinderkopf ringförmig entlang eines Ventilsitzes verläuft. Der Dichtring liegt am Zylinderkopf an und bildet mit diesem Berührungsflächen. Die Berührungsflächen weisen Fugen auf, die zur Abdichtung mit einer thermischen Spritzschicht überzogen sind.The valve seat according to the invention according to claim 1 is characterized in that a sealing ring a cooling channel seals in a cylinder head annular along a valve seat runs. Of the Sealing ring abuts the cylinder head and forms with this contact surfaces. The Have contact surfaces Joints, which are covered with a thermal sprayed layer for sealing are.

Der Dichtring ist bevorzugt in Form einer Aluminium-Büchse ausgestaltet. Zur Montage wird der Dichtring in eine Aussparung des Zylinderkopfes eingelegt. Der Dichtring wird anschließen mit der Spritzschicht versehen. Die Spritzschicht gewährleistet den Halt des Dichtrings im Zylinderkopf während der Montage. Ebenfalls vorteilhaft ist eine gute Dichtwirkung der Spritzschicht gegenüber des Kühlkanals.The sealing ring is preferably in shape an aluminum box designed. For mounting the sealing ring is in a recess of the cylinder head inserted. The sealing ring will connect with the sprayed layer provided. The sprayed layer ensures the Stop the sealing ring in the cylinder head during assembly. Likewise advantageous is a good sealing effect of the spray layer over the Cooling channel.

Ein Ventil liegt im geschlossenen Zustand an der Spritzschicht an. Die Spritzschicht ist durch Feindrehen derart ausgestaltet, dass sie die Konturen des Ventils abbildet und mit dem Ventil eine dichte Passung bildet. Durch die Auswahl des Materials der Spritzschicht kann eine, bezüglich Verschleiß und Reibung optimierte Werkstoffpaarung zwischen dem Ventilwerkstoff und Schichtwerkstoff erzielt werden.A valve is closed Condition on the sprayed layer. The spray coat is by fine turning designed such that it depicts the contours of the valve and forms a tight fit with the valve. By selection of the material of the sprayed layer may be one, in terms of wear and friction Optimized material pairing between the valve material and coating material be achieved.

Unter einer thermischen Spritzschicht wird eine Schicht verstanden, die durch ein beliebiges thermisches Spritzverfahren aufgebracht werden kann. Hierunter fallen z. B. Plasmaspritzen, Flammspritzen, Lichtbogendrahtspritzen und kinetisches Kaltgaskompaktieren. Bevorzugt wird ein metallisches Schichtmaterial gewählt, das auf das Ventilmaterial abgestimmt ist. Keramische oder metallkeramische Schichtmaterialien sind bei entsprechenden Ventileigenschaften denkbar.Under a thermal sprayed coating is a layer understood by any thermal Spray method can be applied. These include z. B. Plasma spraying, flame spraying, arc wire spraying and kinetic cold gas compacting. Preferably, a metallic layer material is selected, the is tuned to the valve material. Ceramic or metal-ceramic Layer materials are conceivable with corresponding valve properties.

Eine vorteilhafte Ausgestaltungsform der Erfindung ist in den folgenden Figuren dargestellt.An advantageous embodiment The invention is illustrated in the following figures.

Es zeigen: Show it:

1 einen Ventilsitz mit einem Kühlkanal, einem Dichtring und einer Spritzschicht, 1 a valve seat with a cooling channel, a sealing ring and a sprayed layer,

1b eine vergrößerte Darstellung des Details b aus 1. 1b an enlarged view of the detail b 1 ,

In 1 ist ein Ausschnitt eines Zylinderkopfes 2 dargestellt, der einen Ventilsitz 4 eines Auslassventils 12 zeigt. Der Ventilsitz 9 weist einen Kühlkanal 6 auf, der durch eine Aussparung 7 im Zylinderkopf 2 einerseits und durch einen Dichtring 8 andererseits gebildet wird.In 1 is a section of a cylinder head 2 shown having a valve seat 4 an exhaust valve 12 shows. The valve seat 9 has a cooling channel 6 on, passing through a recess 7 in the cylinder head 2 on the one hand and through a sealing ring 8th on the other hand is formed.

Die vergrößerte Darstellung in 1b zeigt, dass der Dichtring 8 mit einer hier nicht maßstabgetreu wiedergegebenen Überdeckung 11 im Zylinderkopf 2 eingelassen ist. Die Überdeckung 11 beträgt üblicherweise weniger als 0,1 mm und ist gerade ausreichend, dass der Dichtring 8 in seiner Position vorfixiert ist. Zur endgültigen Fixierung des Dichtrings 8 und zur Abdichtung des Kühlkanals 6, ist der Dichtring 8 mit der Spritzschicht 10 überzogen. Die Spritzschicht 10 ist seitens eines Brennraums 14 so ausgeformt, dass sie im geschlossen Zustand des Ventils 12 (1b) mit diesem dicht abschließt.The enlarged view in 1b shows that the sealing ring 8th with a coverage not reproduced to scale here 11 in the cylinder head 2 is admitted. The cover 11 is usually less than 0.1 mm and is just enough for the sealing ring 8th prefixed in his position. For final fixation of the sealing ring 8th and for sealing the cooling channel 6 , is the sealing ring 8th with the sprayed layer 10 overdrawn. The sprayed layer 10 is on the part of a combustion chamber 14 so shaped that they are in the closed state of the valve 12 ( 1b ) closes tightly with this.

Die Spritzschicht 10 verläuft radial um den Ventilsitz 4. Von der Brennraumseite 14 zu einer Ventiltriebseite 16 bildet sie Oberflächenkonturen 22 des Ventilssitzes 4 aus. Hierbei kann die Spritzschicht 10 in ihrem axialen Verlauf (zu einer Ventilachse 24) unterschiedliche Dicken annehmen. Fugen 19, 21 die durch Berührungsflächen 18, 20 von Dichtring 8 und Zylinderkopf 2 gebildet werden, werden durch die Spritzschicht 10 abgedichtet. Hierdurch wird verhindert, dass Kühlmedium in den Brennraum 14 gelangt. Der Dichtring 8 besteht bevorzugt aus einer Aluminiumlegierung, was für eine gute Wärmeableitung sorgt.The sprayed layer 10 runs radially around the valve seat 4 , From the combustion chamber side 14 to a valve train side 16 it forms surface contours 22 of the valve seat 4 out. Here, the sprayed layer 10 in its axial course (to a valve axis 24 ) assume different thicknesses. Put 19 . 21 through contact surfaces 18 . 20 of sealing ring 8th and cylinder head 2 are formed by the sprayed layer 10 sealed. This will prevent coolant from entering the combustion chamber 14 arrives. The sealing ring 8th is preferably made of an aluminum alloy, which ensures good heat dissipation.

Claims (3)

Ventilsitz (4) für eine Brennkraftmaschine mit einem Dichtring (8), der einen in einem Zylinderkopf (2) ringförmig entlang eines Ventilsitzes (4) verlaufenden Kühlkanal (6) abdichtet dadurch gekennzeichnet, dass der Dichtring (8) mit einer thermischen Spritzschicht (10) derart überzogen ist, dass zumindest Fugen (19, 21), gebildet durch Berührungsflächen (18, 20) von Dichtring (8) und Zylinderkopf (2) durch die Spritzschicht (10) überdeckt sind.Valve seat ( 4 ) for an internal combustion engine with a sealing ring ( 8th ), one in a cylinder head ( 2 ) annularly along a valve seat ( 4 ) extending cooling channel ( 6 ) seals characterized in that the sealing ring ( 8th ) with a thermal spray coating ( 10 ) is coated such that at least joints ( 19 . 21 ), formed by Berüh areas ( 18 . 20 ) of sealing ring ( 8th ) and cylinder head ( 2 ) through the sprayed layer ( 10 ) are covered. Ventilsitz nach Anspruch 1, dadurch gekennzeichnet, dass ein Ventil (12) im geschlossenen Zustand an der Spritzschicht (10) anliegt.Valve seat according to claim 1, characterized in that a valve ( 12 ) in the closed state at the spray layer ( 10 ) is present. Ventilsitz nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Spritzschicht (10) aus einem metallischen Material besteht.Valve seat according to claim 1 or 2, characterized in that the sprayed layer ( 10 ) consists of a metallic material.
DE10226013A 2002-06-12 2002-06-12 Valve seat for internal combustion engine Expired - Fee Related DE10226013B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10226013A DE10226013B4 (en) 2002-06-12 2002-06-12 Valve seat for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10226013A DE10226013B4 (en) 2002-06-12 2002-06-12 Valve seat for internal combustion engine

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DE10226013A1 true DE10226013A1 (en) 2004-01-08
DE10226013B4 DE10226013B4 (en) 2006-10-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016006640A1 (en) 2016-06-02 2016-12-22 Daimler Ag Method for producing a valve seat ring for a reciprocating engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6042320A (en) * 1983-08-02 1985-03-06 チ−ズブロ−ポンズ、インコ−ポレ−テツド Manicure remover

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT381142B (en) * 1981-02-19 1986-08-25 List Hans COOLED VALVE SEAT FOR INLET AND EXHAUST VALVES OF INTERNAL COMBUSTION ENGINES
AT404390B (en) * 1992-09-24 1998-11-25 Avl Verbrennungskraft Messtech INTERNAL COMBUSTION ENGINE WITH A CHILLED VALVE SEAT RING

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6042320A (en) * 1983-08-02 1985-03-06 チ−ズブロ−ポンズ、インコ−ポレ−テツド Manicure remover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016006640A1 (en) 2016-06-02 2016-12-22 Daimler Ag Method for producing a valve seat ring for a reciprocating engine

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DE10226013B4 (en) 2006-10-12

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Legal Events

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OP8 Request for examination as to paragraph 44 patent law
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: DAIMLERCHRYSLER AG, 70327 STUTTGART, DE

8327 Change in the person/name/address of the patent owner

Owner name: DAIMLER AG, 70327 STUTTGART, DE

8320 Willingness to grant licences declared (paragraph 23)
8321 Willingness to grant licences paragraph 23 withdrawn
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee