EP0760902A1 - Head gasket - Google Patents
Head gasketInfo
- Publication number
- EP0760902A1 EP0760902A1 EP95918228A EP95918228A EP0760902A1 EP 0760902 A1 EP0760902 A1 EP 0760902A1 EP 95918228 A EP95918228 A EP 95918228A EP 95918228 A EP95918228 A EP 95918228A EP 0760902 A1 EP0760902 A1 EP 0760902A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel plate
- gasket
- thickness
- rubber
- rubber films
- 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
Links
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
- F02F11/00—Arrangements of sealings in combustion engines
- F02F11/002—Arrangements of sealings in combustion engines involving cylinder heads
Definitions
- the present invention relates to a gasket, and more specifi ⁇ cally to a cylinder head gasket for internal combustion engines.
- Present-day cylinder head gaskets consist in a pack of several thin metal plates, which are often riveted together.
- the pack may contain from three to six plates, which may have been coated with an extremely thin layer of paint, rubber or some other polymer that has been applied in the form of a solution or dispersion.
- a cylinder head gasket which comprises a metal band that has been coated with a layer of rubber on each side thereof.
- the rubber layer is applied in the form of a solution and is then heated to drive-off the solvent and form said layer.
- Prior publications DE-C2-3500071 and JP-A-62/101873 also teach gaskets of this kind that are produced from different types of rubber solutions.
- US-A 5,110,630 describes the manufacture of a metal-rubber gasket in which a thin steel band is treated with chromate and rubber adhesive in sequence in a continuous process followed by a heat-treatment process, whereafter a rubber layer is applied. This is said to be affected by coating the adhesive layer to a desired thickness.
- the laminate will thus have an adhesive layer between each rubber layer and the metal surface.
- the gaskets used today present problems and especially when used with engines in which the cylinder heads and engine blocks are comprised of dissimilar materials, as is becoming more and more usual. For instance, it is becoming more usual to produce the cylinder head from an aluminium alloy and to produce the engine block from cast iron. As a result of the different thermal properties of the materials, transverse movements occur between cylinder head and motor block while the engine is running.
- An ideal gasket material for modern internal combustion engines shall thus exhibit good properties with regard to compressibility and its ability to absorb shear forces while, at the same time, being thin and easy to manufacture cheaply, besides having an effective blow-by resistance, which is particularly important in the present context, i.e. the gasket shall provide the best possible seal under the difficult conditions that prevail in respect of a cylinder head gasket.
- the object of the present invention is to provide a cylinder head gasket which will fulfil the aforesaid high requirements that are placed on gaskets for modern engines which operate under highly advanced operating conditions.
- the inventive cylinder head gasket has the characteristic features set forth in the following Claims.
- the inventive cylinder head gasket is thus characterized in that it includes a laminate which comprises a thin stainless steel plate and/or heat-resistant steel plate.
- the plate is coated on each side with still thinner carrier-calendared rubber films which have a thickness of at least 0.05 mm and are affixed to the steel plate by vulcanization.
- the stainless and/or heat-resistant steel plate will suitably have a thickness of about 0.2-0.4 mm, and each of the rubber films will preferably have a thickness of 0.05-0.20 mm.
- the outwardly facing surface of the rubber films will suitably have a textile-carrier structure, preferably a roughened or "pimpled" structure.
- the specific combination of characteristic features defined in the Claims gives the laminate the unique combination of being compressible, having good shear-force absorbing ability and blow-by resistance (sealing ability), indicated above. It is thus important that the rubber coatings will have those specific properties and that specific structure that are exhibited by calendared rubber films, among other things homogeneity and uniformity with regard to both physical properties and dimensions, and shall be as pore-free as possible.
- a laminate comprised of a 0.20 mm stainless steel plate and two 0.08 mm rubber layers was subjected to a compressibility test in accordance with the following:
- a pack consisting in ten material samples measuring 40 x 40 mm was subjected to a pressure of 16.5 MPa with a force of 2.4 kN at room temperature. This was repeated seven times while maintaining the pressure for a period of one second.
- the pack of laminate samples was found to have been com ⁇ pressed by 16 ⁇ m, which corresponds to a specific compress ⁇ ibility of 2 ⁇ m/10 mPa.
- the engine was prepared by lowering the piston heads to receive a thinner cylinder head gasket produced from the above laminate.
- the gasket was produced from one single laminate consisting in 0.08 mm rubber/0.2 mm stainless steel/0.08 mm rubber of quality Rubore RGM-l-ST.
- the engine was bench-run in accordance with a test programme which simulated motor-way driving, including long periods of full load at maximum r.p.m. and maximum torque, interspersed with periods of intermediate loads and interrupted by an idling period at thirty-minute intervals.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9401401 | 1994-04-25 | ||
SE9401401A SE502513C2 (en) | 1994-04-25 | 1994-04-25 | Head gasket |
PCT/SE1995/000443 WO1995029333A1 (en) | 1994-04-25 | 1995-04-24 | Head gasket |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0760902A1 true EP0760902A1 (en) | 1997-03-12 |
EP0760902B1 EP0760902B1 (en) | 1999-03-24 |
Family
ID=20393771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95918228A Expired - Lifetime EP0760902B1 (en) | 1994-04-25 | 1995-04-24 | Head gasket |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP0760902B1 (en) |
AT (1) | ATE178121T1 (en) |
AU (1) | AU2422495A (en) |
CA (1) | CA2186629C (en) |
CZ (1) | CZ286582B6 (en) |
DE (1) | DE69508578T2 (en) |
DK (1) | DK0760902T3 (en) |
ES (1) | ES2129821T3 (en) |
GR (1) | GR3029793T3 (en) |
HU (1) | HU218781B (en) |
SE (1) | SE502513C2 (en) |
WO (1) | WO1995029333A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE509315C2 (en) | 1995-10-26 | 1999-01-11 | Trelleborg Rubore Ab | Packing |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2184133A5 (en) * | 1972-05-05 | 1973-12-21 | Farnam Co F D | |
SE450730B (en) * | 1981-07-10 | 1987-07-20 | Felt Products Mfg Co | LAMINATED CYLINDER COVER GASKING AND SET TO MAKE IT |
DE3500071A1 (en) * | 1985-01-03 | 1986-07-03 | Elring Dichtungswerke Gmbh, 7012 Fellbach | CYLINDER HEAD GASKET |
US5130203A (en) * | 1988-07-28 | 1992-07-14 | Nippon Leakless Industry Co., Ltd. | Metal gasket and method of producing the same |
SE465763B (en) * | 1990-03-09 | 1991-10-28 | Rubore Materials Sweden Ab | MANUFACTURED TO MAKE A MATERIAL COURSE FOR MANUFACTURING PACKAGING |
JPH0586070U (en) * | 1991-05-31 | 1993-11-19 | ニチアス株式会社 | Head gasket |
-
1994
- 1994-04-25 SE SE9401401A patent/SE502513C2/en not_active IP Right Cessation
-
1995
- 1995-04-24 DE DE69508578T patent/DE69508578T2/en not_active Expired - Fee Related
- 1995-04-24 ES ES95918228T patent/ES2129821T3/en not_active Expired - Lifetime
- 1995-04-24 AT AT95918228T patent/ATE178121T1/en not_active IP Right Cessation
- 1995-04-24 CZ CZ19963022A patent/CZ286582B6/en not_active IP Right Cessation
- 1995-04-24 HU HU9602939A patent/HU218781B/en not_active IP Right Cessation
- 1995-04-24 DK DK95918228T patent/DK0760902T3/en active
- 1995-04-24 CA CA002186629A patent/CA2186629C/en not_active Expired - Fee Related
- 1995-04-24 EP EP95918228A patent/EP0760902B1/en not_active Expired - Lifetime
- 1995-04-24 WO PCT/SE1995/000443 patent/WO1995029333A1/en active IP Right Grant
- 1995-04-24 AU AU24224/95A patent/AU2422495A/en not_active Abandoned
-
1999
- 1999-03-25 GR GR990400594T patent/GR3029793T3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9529333A1 * |
Also Published As
Publication number | Publication date |
---|---|
HU218781B (en) | 2000-12-28 |
SE9401401L (en) | 1995-10-26 |
AU2422495A (en) | 1995-11-16 |
SE9401401D0 (en) | 1994-04-25 |
CA2186629A1 (en) | 1995-11-02 |
EP0760902B1 (en) | 1999-03-24 |
CZ286582B6 (en) | 2000-05-17 |
ES2129821T3 (en) | 1999-06-16 |
SE502513C2 (en) | 1995-11-06 |
GR3029793T3 (en) | 1999-06-30 |
WO1995029333A1 (en) | 1995-11-02 |
DK0760902T3 (en) | 2003-04-14 |
DE69508578D1 (en) | 1999-04-29 |
CZ302296A3 (en) | 1997-02-12 |
HU9602939D0 (en) | 1996-12-30 |
DE69508578T2 (en) | 1999-07-15 |
ATE178121T1 (en) | 1999-04-15 |
CA2186629C (en) | 2003-06-17 |
HUT77502A (en) | 1998-05-28 |
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