EP0704614B1 - Ventilhaube - Google Patents
Ventilhaube Download PDFInfo
- Publication number
- EP0704614B1 EP0704614B1 EP95114436A EP95114436A EP0704614B1 EP 0704614 B1 EP0704614 B1 EP 0704614B1 EP 95114436 A EP95114436 A EP 95114436A EP 95114436 A EP95114436 A EP 95114436A EP 0704614 B1 EP0704614 B1 EP 0704614B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve cover
- disc springs
- seal
- cover according
- plastic
- 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.)
- Expired - Lifetime
Links
Images
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
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/006—Camshaft or pushrod housings
-
- 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
- F02F5/00—Piston rings, e.g. associated with piston crown
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/06—Polyamides, e.g. NYLON
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/16—Fibres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/18—Filler
Definitions
- the invention relates to an acoustically decoupled valve cover for internal combustion engines based on plastic or metal as a hood material with a with elastic plastic seal as sealing material and connecting elements Disc springs that acoustically decouple the valve cover from the engine housing.
- Valve covers cover the camshafts of internal combustion engines.
- On the The underside of the hood is usually the connection to the cylinder head with a Sealed gasket. This seal is attached to the Cylinder head preloaded to provide the required surface pressure for sealing the connection between the valve cover and the cylinder head.
- the valve cover is traditionally made of aluminum. Sometimes when the hood shape and the fastening concept allow it, also plastic used, e.g. Polyamide.
- plastic used, e.g. Polyamide.
- the use of plastic as a hood material is advantageous compared to the use of metal, in particular aluminum, since it does so Manufacturing costs can be saved, the hood a lower weight and a has better surface quality.
- valve cover material The use, in particular of plastic as the valve cover material, proves in the previously known valve cover designs for the following reasons as disadvantageous:
- the preload load case occurs for a long time (ie over 10 3 - 10 4 hours) in connection with high temperature fluctuations (from -40 ° C - 140 ° C) or also with time-lapse testing within 10 3 h and a temperature of 130 - 150 ° C .
- a high temperature and the longevity of the load prove to be unfavorable for thermoplastics and the creep of the material is accelerated. Creep is understood here to mean a permanent change in shape resulting in a loss of preload until leakage of the valve cover occurs.
- the fastening screws would have to be tightened at regular intervals to compensate, but this is not possible for various reasons.
- decoupling elements mentioned are comparatively expensive to manufacture. Since they also have a soft intermediate layer made of an elastomer, they increase the risk of a loss of pre-tension by setting and creeping effects. This makes it clear that e.g. uncoupled plastic hoods so far have been used.
- the object of the invention is an acoustically decoupled valve cover To provide, especially made of plastic, preferably thermoplastic Plastic, as a hood material, which does not have the disadvantages mentioned and in particular the acoustic decoupling while maintaining the Prestressing over a long period possible.
- an acoustically decoupled Valve cover for internal combustion engines based on plastic, in particular thermoplastic, or metal, especially aluminum, magnesium, Steel or titanium, particularly preferably made of glass fiber reinforced polyamide-66, with an elastic plastic seal as a sealing material and one or several connecting elements, preferably screws, for connecting the Valve cover with the motor housing, for fixing the valve cover on the motor housing fasteners are underlaid with disc springs that the Pass on the pretensioning of the fastening elements to the valve cover, in Operating point a horizontal characteristic curve in the force / travel characteristic have (corresponding to a spring rate of 0) and at which the disc springs be guided in a seat of the valve cover.
- the structure shown in FIG. 2 is an example of a central screw connection described.
- the valve cover 1 is underlaid with a plate spring 5 Fastening screw 4 with the housing of the engine block 2 below connected.
- the sealing of the valve cover 1 with the help of the seal 3 can under Using the usual temperature-resistant sealing materials will. Because of the low Shore hardness that can be achieved, in particular silicone seals, e.g. Silopren LSR 2030, Bayer, as proven acoustic decoupling elements.
- the fastening screw 4 can be a in a variant shown in FIG have small paragraph 8 at the top of the screw shaft to prevent premature Prevent the disc spring from being placed on the underside of the screw head. Accordingly, a support surface 7 can also be in the disc spring seat 6 of the valve cover be provided. An additional sealing membrane 9, which may be used can prevent the escape of oil in the area of the fastening elements.
- valve covers e.g. Flange fittings according to the invention be provided.
- the flange advantage becomes the cost advantage compared to known valve covers reinforced due to the larger number of required fasteners.
- With the central screw connection shown is considered another effect that would otherwise be due to different coefficients of thermal expansion between the plastic (the valve cover) and the Cast iron or aluminum (of the motor housing) inevitable temperature dependence the preload is eliminated.
Landscapes
- 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)
- Bolts, Nuts, And Washers (AREA)
- Gasket Seals (AREA)
- Check Valves (AREA)
Description
- Fig. 1
- ein schematisches Federkraft-Vorspannungsdiagramm einer Tellerfeder,
- Fig. 2
- eine Schnittzeichnung der erfindungsgemäßen Ventilhaube,
- Fig. 3
- eine bevorzugte Tellerfederform bei der Verwendung von Standardschrauben.
Claims (6)
- Akustisch entkoppelte Ventilhaube (1) für Verbrennungsmotoren auf Basis von Kunststoff oder Metall als Haubenmaterial mit einer elastischen Kunststoffdichtung (3) als Dichtmaterial und einem oder mehreren Verbindungselementen (4), bei der zur Befestigung der Ventilhaube (1) auf dem Motorgehäuse (2) die Befestigungselemente (4) mit Tellerfedern (5) unterlegt sind, die die Vorspannung der Befestigungselemente (4) an die Ventilhaube (1) weitergeben, die Tellerfedern (5) im Betriebspunkt einen horizontalen Kennlinienverlauf in der Kraft/Federweg-Kennlinie aufweisen und bei der die Tellerfedern (5) in einem Sitz (6) der Ventilhaube (1) geführt werden.
- Ventilhaube nach Anspruch 1, dadurch gekennzeichnet, daß als Haubenmaterial ein thermoplastischer Kunststoff oder Aluminium, Magnesium, Stahl oder Titan eingesetzt wird.
- Ventilhaube nach Anspruch 1, dadurch gekennzeichnet, daß das Haubenmaterial glasfaserverstärktes Polyamid ist.
- Ventilhaube nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß als Befestigungselemente (4) Schrauben eingesetzt werden, die eine zusätzliche Auflagefläche (8) aufweisen.
- Ventilhaube nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß der Sitz (6) der Ventilhaube (1) zur Führung der Tellerfeder (5) eine zusätzliche Auflagefläche (7) aufweist.
- Ventilhabe nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß als Dichtungsmaterial für die Ventilhaubendichtung (3) Silikon mit niedriger Shorehärte eingesetzt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4434453A DE4434453C2 (de) | 1994-09-27 | 1994-09-27 | Ventilhaube |
DE4434453 | 1994-09-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0704614A1 EP0704614A1 (de) | 1996-04-03 |
EP0704614B1 true EP0704614B1 (de) | 1998-03-25 |
Family
ID=6529284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95114436A Expired - Lifetime EP0704614B1 (de) | 1994-09-27 | 1995-09-14 | Ventilhaube |
Country Status (6)
Country | Link |
---|---|
US (1) | US5655489A (de) |
EP (1) | EP0704614B1 (de) |
JP (1) | JP3683014B2 (de) |
KR (1) | KR100385249B1 (de) |
DE (2) | DE4434453C2 (de) |
ES (1) | ES2113703T3 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5884594A (en) * | 1997-12-01 | 1999-03-23 | Wiehle; David C. | Valve cover system for motors |
US6257188B1 (en) * | 1998-09-02 | 2001-07-10 | Honda Giken Kogyo Kabushiki Kaisha | Structure for mounting cylinder head cover of internal combustion engine |
US6085709A (en) * | 1998-12-10 | 2000-07-11 | Detroit Diesel Corporation | Engine rocker arm cover having reduced noise transmission |
DE19910467C1 (de) * | 1999-03-10 | 2000-10-19 | Schott Glas | Halterung und Verfahren zur Herstellung einer Halterung für im wesentlichen flache Formkörper aus sprödbrüchigem Werkstoff |
DE10119892C2 (de) * | 2001-04-24 | 2003-04-03 | Skf Ab | Deckel, insbesondere zur Dämpfung des Geräusches eines Verbrennungsmotors |
US20040121674A1 (en) * | 2002-12-18 | 2004-06-24 | Robbins Jeffrey R. | Composite engine component and method for making the same |
US20050132997A1 (en) * | 2003-12-18 | 2005-06-23 | Marcus Vargas | Customization cover for engine valve covers |
US20050220564A1 (en) * | 2004-04-01 | 2005-10-06 | Hinson Kerry D | Fastener assembly with wave spring |
US7051695B1 (en) * | 2004-04-30 | 2006-05-30 | Kowis Albert L | Valve cover fastener and method |
US7255079B2 (en) * | 2004-10-18 | 2007-08-14 | Federal-Mogul World Wide, Inc. | Flanged cover assembly with flange pressure distribution compensator |
US7343890B1 (en) * | 2006-09-25 | 2008-03-18 | Platt Richard B | Two-piece valve cover |
CN105026705B (zh) * | 2013-02-25 | 2018-01-02 | 夏伊洛工业公司 | 具有压入配合紧固件孔的模块化组件 |
DE112019003424B4 (de) * | 2018-07-05 | 2023-12-14 | Ihi Corporation | Ventilmechanismus mit variabler Strömungsrate und Turbolader |
DE102019201357A1 (de) * | 2019-02-04 | 2020-08-06 | Continental Teves Ag & Co. Ohg | Vorrichtung zur Befestigung einer Luftfeder mit akustischer Entkopplung |
USD993283S1 (en) | 2021-12-07 | 2023-07-25 | Specialty Auto Parts U.S.A., Inc. | Valve cover for internal combustion engine |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1263077A (en) * | 1968-04-26 | 1972-02-09 | John Vickers And Sons Ltd | Improvements in machinery covers |
US4027644A (en) * | 1975-06-26 | 1977-06-07 | Cummins Engine Company, Inc. | Isolated engine cover |
JPS5812658U (ja) * | 1981-07-16 | 1983-01-26 | 日産自動車株式会社 | ロツカ−カバ− |
US4456268A (en) * | 1982-09-30 | 1984-06-26 | Allis-Chalmers Corp. | Fastening means in sealed gasket assembly including shoulder bolt |
US4571133A (en) * | 1984-07-23 | 1986-02-18 | General Motors Corporation | Loading washer assembly |
US4593659A (en) * | 1985-06-28 | 1986-06-10 | Cummins Engine Company, Inc. | Engine valve cover |
DE4221760C2 (de) * | 1991-12-17 | 1996-07-11 | Cr Elastomere Gmbh | Körperschallisolierter Deckel, insbesondere für Brennkraftmaschinen |
US5323740A (en) * | 1993-07-13 | 1994-06-28 | Saturn Corporation | Molded dual cam cover |
US5365901A (en) * | 1993-11-15 | 1994-11-22 | Freudenberg-Nok General Partnership | Low creep flange and engine cover assembly |
US5375569A (en) * | 1994-01-26 | 1994-12-27 | General Electric Company | Multi polymer structures for internal combustion engines |
-
1994
- 1994-09-27 DE DE4434453A patent/DE4434453C2/de not_active Expired - Fee Related
-
1995
- 1995-09-14 DE DE59501693T patent/DE59501693D1/de not_active Expired - Fee Related
- 1995-09-14 EP EP95114436A patent/EP0704614B1/de not_active Expired - Lifetime
- 1995-09-14 ES ES95114436T patent/ES2113703T3/es not_active Expired - Lifetime
- 1995-09-15 US US08/528,777 patent/US5655489A/en not_active Expired - Fee Related
- 1995-09-19 KR KR1019950031272A patent/KR100385249B1/ko not_active IP Right Cessation
- 1995-09-22 JP JP26804195A patent/JP3683014B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR100385249B1 (ko) | 2003-08-14 |
KR960011102A (ko) | 1996-04-20 |
JP3683014B2 (ja) | 2005-08-17 |
JPH08114154A (ja) | 1996-05-07 |
DE59501693D1 (de) | 1998-04-30 |
DE4434453A1 (de) | 1996-04-04 |
US5655489A (en) | 1997-08-12 |
ES2113703T3 (es) | 1998-05-01 |
EP0704614A1 (de) | 1996-04-03 |
DE4434453C2 (de) | 1996-07-18 |
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