EP0126854A1 - Valve guide for an internal-combustion engine - Google Patents

Valve guide for an internal-combustion engine Download PDF

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Publication number
EP0126854A1
EP0126854A1 EP84102087A EP84102087A EP0126854A1 EP 0126854 A1 EP0126854 A1 EP 0126854A1 EP 84102087 A EP84102087 A EP 84102087A EP 84102087 A EP84102087 A EP 84102087A EP 0126854 A1 EP0126854 A1 EP 0126854A1
Authority
EP
European Patent Office
Prior art keywords
guide
valve guide
valve
bushes
bore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84102087A
Other languages
German (de)
French (fr)
Inventor
Walter Dipl.-Ing. Mittermeier (FH)
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0126854A1 publication Critical patent/EP0126854A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • 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
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis

Definitions

  • the invention relates to a valve guide for internal combustion engines with a guide bore which has at least two ring-like guide sections arranged at a distance from one another.
  • valve guide In a known internal combustion engine (DE-AS 11 48 812), the valve guide is equipped with two plastic bushings arranged at a distance from one another. This design has the disadvantage that it does not withstand the increasing requirements with regard to heat and wear resistance.
  • the object of the invention is to design a valve guide for an internal combustion engine in such a way that it is wear-resistant with low-cost manufacture, has good sliding properties and remains functional even with changing and high temperatures.
  • the ceramic guide sections of the valve guide are wear-resistant and temperature-resistant; they also have good sliding properties.
  • These guide sections can either be provided directly in the cylinder head or in metallic inserts. Is the metal metallic insert is made of a bronze alloy, it is in conjunction with the ceramic guide portions an advantageous Z weistoffaus entry with particularly good sliding properties.
  • the ceramic guide sections can be coated by coating the valve guide bores, e.g. B. are formed at their end regions.
  • the cylinder head 1 according to FIG. 1 has a channel which can be opened and closed in the direction of a combustion chamber 3 by means of a valve, not shown. This valve interacts with a valve seat and a valve guide 5.
  • valve guide 5 is shown in Fig. 1 directly in, e.g. made of a light metal alloy, cylinder head 1 provided, d. H. the guide bore 6 is part of the cylinder head.
  • guide sections 7, 8 are attached, which consist of ceramic and preferably extend over the end regions 9, 10 of the guide bore 6, adjacent zones A and B.
  • the ceramic guide sections 7, 8 are formed by coating zones A and B.
  • valve guide 11 by a metallic insert 12, for. B. made of a bronze alloy, which is pressed into the bore 13 of the cylinder head 14.
  • the guide sections 15, 16 are formed here by bushings 17, 18 made of ceramic, which are pressed into the guide bore 19 of the valve guide 11 (non-positive attachment).
  • the valve guide 20 has ceramic bushings 21, 22 which are connected to the valve guide 20 when it is cast.
  • an intermeshing section 24 is provided between the bushing 21 and the guide bore 23, which section is formed by an annular extension 25 of the bushing 21.
  • the projection 25 is arranged at the same distance from the upper and lower ends of the socket 21.
  • the extension 26 of the socket 22 is attached to the upper end thereof.
  • valve guide is directly assigned to the cylinder head 1, the above anchoring measure of the bushings 21 and 22 can be applied analogously.
  • the socket 26 has on its outer lateral surface 27 a recess 28 into which a corresponding section 29 of the insert 30 is rolled.

Landscapes

  • 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 IC engine valve guide is a drilling with at least two separate guiding elements. These (7,8) are ceramic, permanently fixed to the drilling wall (6). They may be applied as coatings, or take the form of bushes fastened into the drilling, pref. near the ends. Where the drillings are directly in the cylinderhead, or in an insert in this, the bushes may be embodied during the casting process. Anchorage may be provided by means of interlocking portions. Alternatively the bushes may be a press-fit. With an insert, the bushes may be externally-grooved and the insert rolled-in.

Description

Die Erfindung betrifft eine Ventilführung für Brennkraftmaschinen mit einer Führungsbohrung, die wenigstens zwei ringartige mit Abstand zueinander angeordnete Führungsabschnitte aufweist.The invention relates to a valve guide for internal combustion engines with a guide bore which has at least two ring-like guide sections arranged at a distance from one another.

Bei einer bekannten Brennkraftmaschine (DE-AS 11 48 812) ist die Ventilführung mit zwei im Abstand zueinander angeordneten Kunststoff-Buchsen ausgestattet. Dieser Ausführung haftet der Nachteil an, daß sie den steigenden Anforderungen hinsichtlich Wärme- und Verschleißresistenz nicht standhält.In a known internal combustion engine (DE-AS 11 48 812), the valve guide is equipped with two plastic bushings arranged at a distance from one another. This design has the disadvantage that it does not withstand the increasing requirements with regard to heat and wear resistance.

Aufgabe der Erfindung ist es, eine Ventilführung für eine Brennkraftmaschine so zu gestalten, daß sie bei günstiger Herstellung verschleißfest ist, gute Gleiteigenschaft besitzt und auch bei wechselnden sowie hohen Temperaturen funktionsfähig bleibt.The object of the invention is to design a valve guide for an internal combustion engine in such a way that it is wear-resistant with low-cost manufacture, has good sliding properties and remains functional even with changing and high temperatures.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere, die Erfindung ausgestaltenden Merkmale sind in den Unteransprüchen enthalten.According to the invention, this object is achieved by the characterizing features of claim 1. Further features embodying the invention are contained in the subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, daß die Keramik-Führungsabschnitte der Ventilführung verschleißfest und temperaturbeständig sind; auch besitzen sie gute Gleiteigenschaften. Diese Führungsabschnitte können entweder direkt im Zylinderkopf oder aber in metallischen Einsätzen vorgesehen werden. Besteht der metallische Einsatz aus einer Bronzelegierung, so bildet sie in Verbindung mit den Keramik-Führungsabschnitten eine vorteilhafte Zweistoffausführung mit besonders guten Gleiteigenschaften. Die Keramik-Führungsabschnitte können durch Beschichten der Ventilführungsbohrungen, z. B. an deren Endbereiche, gebildet werden.The main advantages achieved with the invention are that the ceramic guide sections of the valve guide are wear-resistant and temperature-resistant; they also have good sliding properties. These guide sections can either be provided directly in the cylinder head or in metallic inserts. Is the metal metallic insert is made of a bronze alloy, it is in conjunction with the ceramic guide portions an advantageous Z weistoffausführung with particularly good sliding properties. The ceramic guide sections can be coated by coating the valve guide bores, e.g. B. are formed at their end regions.

Es besteht aber auch die Möglichkeit, Keramik-Buchsen in die Ventilführungsbohrung einzusetzen und diese form- und/oder kraftschlüssig, gegebenenfalls auch stoffschlüssig zu befestigen.However, there is also the possibility of inserting ceramic bushings into the valve guide bore and fastening them in a form-fitting and / or force-fitting manner, if necessary also in a material-fitting manner.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, die nachstehend näher beschrieben sind. Es zeigt

  • Fig. 1 einen Teilquerschnitt eines Zylinderkopfes mit der erfindungsgemäßen Ventilführung,
  • Fig. 2 eine Ansicht entsprechend Fig. 1,
  • Fig. 3 eine Teilansicht der Fig. 1 in größerem Maßstab,
  • Fig. 4 eine Einzelheit X der Fig. 1 in größerem Maßstab.
In the drawing, embodiments of the invention are shown, which are described in more detail below. It shows
  • Fi g. 1 shows a partial cross section of a cylinder head with the valve guide according to the invention,
  • 2 is a view corresponding to FIG. 1,
  • Fi g. 3 is a partial view of FIG. 1 on a larger scale,
  • Fi g. 4 shows a detail X of FIG. 1 on a larger scale.

Der Zylinderkopf 1 gemäß Fig. 1 weist einen Kanal auf, der in Richtung eines Brennraums 3 mittels eines nicht gezeigten Ventils geöffnet und geschlossen werden kann. Dieses Ventil wirkt mit mit einem Ventilsitz und einer Ventilführung 5 zusammen.The cylinder head 1 according to FIG. 1 has a channel which can be opened and closed in the direction of a combustion chamber 3 by means of a valve, not shown. This valve interacts with a valve seat and a valve guide 5.

Die Ventilführung 5 ist gemäß Fig. 1 direkt im, z.B. aus einer Leichtmetall-Legierung bestehenden, Zylinderkopf 1 vorgesehen, d. h. die Führungsbohrung 6 ist Bestandteil des Zylinderkopfs.The valve guide 5 is shown in Fig. 1 directly in, e.g. made of a light metal alloy, cylinder head 1 provided, d. H. the guide bore 6 is part of the cylinder head.

Innerhalb der Führungsbohrung 6 sind Führungsabschnitte 7, 8 angebracht, die aus Keramik bestehen und sich vorzugsweise über den Endbereichen 9, 10 der Führungsbohrung 6 benachbarte Zonen A und B erstrecken. Die Führungsabschnitte 7, 8 aus Keramik werden durch Beschichten der Zonen A und B gebildet.Inside the guide bore 6, guide sections 7, 8 are attached, which consist of ceramic and preferably extend over the end regions 9, 10 of the guide bore 6, adjacent zones A and B. The ceramic guide sections 7, 8 are formed by coating zones A and B.

In Fig. 2 ist die Ventilführung 11 durch einen metallischen Einsatz 12, z. B. aus einer Bronzelegierung dargestellt, die in die Bohrung 13 des Zylinderkopfes 14 eingepreßt wird.In Fig. 2, the valve guide 11 by a metallic insert 12, for. B. made of a bronze alloy, which is pressed into the bore 13 of the cylinder head 14.

Die Führungsabschnitte 15, 16 werden hier durch Buchsen 17, 18 aus Keramik gebildet, die in die Führungsbohrung 19 der Ventilführung 11 eingepresst sind (kraftschlüssige Befestigung).The guide sections 15, 16 are formed here by bushings 17, 18 made of ceramic, which are pressed into the guide bore 19 of the valve guide 11 (non-positive attachment).

Nach Fig. 3 weist die Ventilführung 20 keramische Buchsen 21, 22 auf, die beim Gießen der Ventilführung 20 mit dieser verbunden werden. Hierzu ist zwischen der Buchse 21 und der Führungsbohrung 23 ein ineinandergreifender Abschnitt 24 angebracht, der durch einen ringförmigen Ansatz 25 der Buchse 21 gebildet wird. Der Ansatz 25 ist mit gleichem Abstand zum oberen und zum unteren Ende der Buchse 21 angeordnet. Dagegen ist der Ansatz 26 der Buchse 22 am oberen Ende von dieser angebracht.3, the valve guide 20 has ceramic bushings 21, 22 which are connected to the valve guide 20 when it is cast. For this purpose, an intermeshing section 24 is provided between the bushing 21 and the guide bore 23, which section is formed by an annular extension 25 of the bushing 21. The projection 25 is arranged at the same distance from the upper and lower ends of the socket 21. In contrast, the extension 26 of the socket 22 is attached to the upper end thereof.

Ist die Ventilführung direkt dem Zylinderkopf 1 zugeordnet, so kann die vorstehende Verankerungsmaßnahme der Buchse 21 und 22 analog angewandt werden.If the valve guide is directly assigned to the cylinder head 1, the above anchoring measure of the bushings 21 and 22 can be applied analogously.

In Fig. 4 weist die Buchse 26 an ihrer äußeren Mantelfläche 27 eine Ausnehmung 28 auf, in die ein korrespondierender Abschnitt 29 des Einsatzes 30 eingerollt ist.In Fig. 4, the socket 26 has on its outer lateral surface 27 a recess 28 into which a corresponding section 29 of the insert 30 is rolled.

Claims (7)

1. Ventilführung für Brennkraftmaschinen mit einer Führungsbohrung, die wenigstens zwei ringartige mit Abstand zueinander angeordnete Führungsabschnitte aufweist, dadurch gekennzeichnet, das die Führungsabschnitte (7, 8) aus Keramik bestehen und fest mit der Führungsbohrung (6) verbunden sind.1. Valve guide for internal combustion engines with a guide bore which has at least two ring-like guide sections arranged at a distance from one another, characterized in that the guide sections (7, 8) consist of ceramic and are firmly connected to the guide bore (6). 2. Ventilführung nach Anspruch 1, dadurch gekennzeichnet, daß die Führungsabschnitte (7, 8) durch Beschichten gebildet sind.2. Valve guide according to claim 1, characterized in that the guide sections (7, 8) are formed by coating. 3. Ventilführung nach Anspruch 1, dadurch gekennzeichnet, daß die Führungsabschnitte (14, 15) durch vorzugsweise am Ende der Führungsbohrung (18, 22) angebrachte Buchsen (16, 17, 20, 21, 25) gebildet werden.3. Valve guide according to claim 1, characterized in that the guide sections (14, 15) by preferably at the end of the guide bore (18, 22) attached bushings (16, 17, 20, 21, 25) are formed. 4. Ventilführung, deren Führungsbohrung direkt in einen Zylinderkopf oder in einem metallischen Einsatz vorgesehen ist, nach den Ansprüchen 1 und 3, dadurch gekennzeichnet, daß die Buchsen (20, 21) durch beim Gießen des Zylinderkopfs (1) bzw. des metallischen Einsatzes (12) in der Führungsbohrung (22) . verankerte Teile dargestellt sind.4. Valve guide, the guide bore is provided directly in a cylinder head or in a metallic insert, according to claims 1 and 3, characterized in that the bushings (20, 21) by when casting the cylinder head (1) or the metallic insert ( 12) in the guide bore (22). anchored parts are shown. 5. Ventilführung nach Anspruch 4, dadurch gekennzeichnet, daß zur Verankerung der Buchsen (20, 21) zwischen diesen und der Führungsbohrung (20) ineinandergreifende Abschnitte (23) vorgesehen sind.5. Valve guide according to claim 4, characterized in that interlocking sections (23) are provided for anchoring the bushes (20, 21) between them and the guide bore (20). 6. Ventilführung nach Anspruch 1, dadurch gekennzeichnet, daß die Buchsen (16, 17) in die Führungsbohrung (18) der Ventilführung (11) eingepreßt sind.6. Valve guide according to claim 1, characterized in that the bushes (16, 17) in the guide bore (18) of the valve guide (11) are pressed. 7. Ventilführung nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Einsatz (29) wenigstens einen in Vertiefungen (29) der Buchse (25) eingerollten Bereich umfaßt.7. Valve guide according to one or more of the preceding claims, characterized in that the insert (29) comprises at least one area rolled into recesses (29) in the bushing (25).
EP84102087A 1983-05-25 1984-02-29 Valve guide for an internal-combustion engine Withdrawn EP0126854A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833318899 DE3318899A1 (en) 1983-05-25 1983-05-25 VALVE GUIDE FOR INTERNAL COMBUSTION ENGINES
DE3318899 1983-05-25

Publications (1)

Publication Number Publication Date
EP0126854A1 true EP0126854A1 (en) 1984-12-05

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ID=6199801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102087A Withdrawn EP0126854A1 (en) 1983-05-25 1984-02-29 Valve guide for an internal-combustion engine

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EP (1) EP0126854A1 (en)
DE (1) DE3318899A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3040526A1 (en) * 2014-12-30 2016-07-06 General Electric Company Multi-material valve guide system and method
CN114033523A (en) * 2021-10-31 2022-02-11 东风商用车有限公司 Air valve guide pipe of engine and manufacturing method thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3443393A1 (en) * 1984-11-28 1986-05-28 Voest-Alpine Friedmann GmbH, Linz Valve, especially for exhaust gas recirculation etc. in internal- combustion engines
DE3610534A1 (en) * 1986-03-27 1987-10-01 Porsche Ag VALVE GUIDE FOR AN EXHAUST VALVE OF AN INTERNAL COMBUSTION ENGINE
US4688527A (en) * 1986-03-31 1987-08-25 Chrysler Motors Corporation Ceramic valve guide and seat
US5564187A (en) * 1994-12-22 1996-10-15 Chrysler Corporation Apparatus and method for an aluminum alloy cylinder head having a valve guide bore with spaced wear resistant integral surfaces
CN103883373B (en) * 2014-03-27 2017-01-18 潍柴动力股份有限公司 Valve guide pipe and manufacturing method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134250A (en) * 1936-02-24 1938-10-25 Bendix Aviat Corp Valve seat and guide
US2722925A (en) * 1953-07-03 1955-11-08 Eric M Mcelhinney Valve guide
US2775024A (en) * 1953-05-29 1956-12-25 Thompson Prod Inc Powder metal multi-ring bushing
DE1148812B (en) * 1961-07-01 1963-05-16 Volkswagenwerk Ag Valve guide for internal combustion engines
FR2016346A1 (en) * 1968-08-24 1970-05-08 Maschf Augsburg Nuernberg Ag
US4106782A (en) * 1977-08-18 1978-08-15 Koppers Company, Inc. Ceramic coated piston rings
DE3200549A1 (en) * 1981-01-12 1982-10-07 Kennecott Corp., 06904 Stamford, Conn. Internal combustion engine with improved components
EP0067327A1 (en) * 1981-05-27 1982-12-22 Kabushiki Kaisha Toshiba Ceramic engine part with improved abrasion resistance

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134250A (en) * 1936-02-24 1938-10-25 Bendix Aviat Corp Valve seat and guide
US2775024A (en) * 1953-05-29 1956-12-25 Thompson Prod Inc Powder metal multi-ring bushing
US2722925A (en) * 1953-07-03 1955-11-08 Eric M Mcelhinney Valve guide
DE1148812B (en) * 1961-07-01 1963-05-16 Volkswagenwerk Ag Valve guide for internal combustion engines
FR2016346A1 (en) * 1968-08-24 1970-05-08 Maschf Augsburg Nuernberg Ag
US4106782A (en) * 1977-08-18 1978-08-15 Koppers Company, Inc. Ceramic coated piston rings
DE3200549A1 (en) * 1981-01-12 1982-10-07 Kennecott Corp., 06904 Stamford, Conn. Internal combustion engine with improved components
EP0067327A1 (en) * 1981-05-27 1982-12-22 Kabushiki Kaisha Toshiba Ceramic engine part with improved abrasion resistance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3040526A1 (en) * 2014-12-30 2016-07-06 General Electric Company Multi-material valve guide system and method
CN114033523A (en) * 2021-10-31 2022-02-11 东风商用车有限公司 Air valve guide pipe of engine and manufacturing method thereof

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Publication number Publication date
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Inventor name: MITTERMEIER, WALTER, DIPL.-ING. (FH)