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Metal gasket

A gasket, metal technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of reduced sealing performance, damage to the sealing line, unable to obtain sealing performance, etc., to improve the sealing performance and increase the sealing surface pressure. Effect

Inactive Publication Date: 2008-07-09
ISHIKAWA GASKET CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] However, when arranging the grommet, the grommet is arranged on the periphery of the cylinder bore hole (hole for cylinder bore) in a state where the metal structural plate is sandwiched, so that the grommet member is directly connected to the cylinder head and the cylinder block. Contact forms the seal line on the innermost peripheral side. Therefore, there is a problem that in recent engine parts made of aluminum alloy with low rigidity and easy damage, damage will occur at the part of the seal line. The sealing performance is reduced, and proper sealing performance cannot be obtained
In addition, also in the folded structure, the folded portion is in direct contact with the cylinder head and cylinder block to form a seal line on the innermost peripheral side, so there is the same problem

Method used

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Embodiment Construction

[0027] Hereinafter, embodiments of the metal gasket according to the present invention will be described by taking a cylinder head gasket as an example with reference to the drawings. 1 and 2 are schematic explanatory diagrams, and in order to make the structure easier to understand, dimensions such as plate thickness, size of the hole to be sealed, size of the folded portion, and size of the bead are shown exaggeratedly different from the actual ones.

[0028] The metal gasket according to the embodiment of the present invention is a cylinder head gasket sandwiched between engine components such as the cylinder head and the cylinder block of the engine, and is used for the high-temperature and high-pressure combustion gas and cooling water passages of the cylinder bore. , Cooling oil passages and other fluids such as cooling water and cooling oil are sealed.

[0029] The cylinder head gasket has a plurality of metal structural plates (metal substrates) formed of low carbon st...

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Abstract

The present invention provides a metal gasket capable of improving the sealing performance around a hole to be sealed, such as a cylinder bore of an engine, by utilizing the pressure of a fluid to be sealed. The metal gasket (1) has two or more metal structural plates (10, 20), sandwiched between two parts for sealing, and the hole (2) facing the sealing object of the metal gasket (1) ), a U-shaped ring (30) protruding toward the outer peripheral side is arranged between the two metal structural plates (10, 20). Furthermore, a seal ring is provided inside the U-shaped ring (30).

Description

technical field [0001] The present invention relates to a metal gasket sandwiched between two parts such as a cylinder head and a cylinder block of an engine for sealing. A metal gasket that exhibits excellent sealing performance. Background technique [0002] The cylinder head gasket (cylinder head gasket) is clamped between the cylinder head and the cylinder block of the motor vehicle engine, and is fastened by cylinder head screws, and has the function of sealing combustion gas, oil, cooling water and other fluids role. [0003] In this cylinder head metal gasket, in order to prevent corrosive combustion gas at high temperature from entering between the metal structural plates of the gasket, a U-shaped ring guard is arranged so as to protrude toward the side of the cylinder bore hole. A grommet, a folded portion formed by folding a metal structural plate (for example, refer to Patent Document 1). [0004] However, when arranging the grommet, the grommet is arranged on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/08
CPCF16J15/0825F16J2015/0862F16J15/06
Inventor 木下裕一
Owner ISHIKAWA GASKET CO LTD
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