Cylinder head gasket

A technology of gaskets and cylinder heads, which is used in engine sealing, engine sealing devices, machines/engines, etc., can solve the problems of easy cracks and accelerated deformation of cylinder barrels, so as to reduce indentation, restrain deformation, and restrain surface The effect of rising pressure

Inactive Publication Date: 2007-11-21
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in this cylinder head gasket, the tightening pressure (sealing pressure) at the edge of the cylinder port becomes the highest, so the problem of accelerated deformation of the cylinder bore cannot be solved.
In addition, the folded portion is directly folded back, and the folded radius of the folded portion is small, so there is a problem that cracks are likely to occur

Method used

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Embodiment Construction

[0042] Next, embodiments of the cylinder head gasket of the present invention will be described with reference to the drawings. In addition, Fig. 1 to Fig. 6 are schematic explanatory diagrams, in order to make the structure easier to understand, the dimensions such as the plate thickness, the size of the hole for the cylinder bore, the size of the folded part, and the size of the flange are all different from the actual size. , exaggerated to express.

[0043] The cylinder head gasket of the present invention is a metal gasket sandwiched between engine components such as the cylinder head and the cylinder block of the engine, and is resistant to the high temperature and high pressure combustion gas of the cylinder bore, the cooling water passage, the cooling oil passage, etc. Cooling water, engine oil and other fluids are sealed.

[0044] The cylinder head gasket is composed of a single or a plurality of metal constituent plates (metal substrates) formed of mild steel plates...

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PUM

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Abstract

The invention provide a cylinder head gasket having sufficient sealing performance around a cylinder bore hole while suppressing the deformation of a cylinder bore of an engine. The cylinder head gasket 1 comprises: a first metal structural plate 10 having a folded back portion 11 and formed around the cylinder bore hole 2; and full beads 21 formed opposite to each other on a second metal structural plate 20 and a third metal structural plate 30, respectively, holding the first metal structural plate 10 therebetween with their protrusions on the sides of the first metal structural plate 10, the full beads 21 which have protruded portions 21a arranged on the inner periphery side of an end 11a of the folded back portion 11. At least one or more sub plates 40, 50 are inserted and arranged inside the folded back portion 11. Thicknesses t2 of the second metal structural plate 20 and the third metal structural plate 30 around the cylinder bore hole 2 are respectively smaller than a half th of a thickness tg of the folded back portion 11.

Description

technical field [0001] The present invention relates to a cylinder head gasket sandwiched between two components such as a cylinder head and a cylinder block of an engine for sealing. In the event of misalignment, the increase in surface pressure on the front end of the cylinder bore can also be suppressed, thereby reducing the cylinder head gasket such as indentations that occur on components. Background technique [0002] The cylinder head gasket is clamped between the cylinder head and the cylinder block of the automobile engine, and is connected by the cylinder head bolts to seal fluids such as combustion gas, engine oil, and cooling water. [0003] In addition, due to the recent reduction in the weight and size of the engine, the engine tends to be lower in rigidity. When the cylinder head gasket is sealed, when a large sealing surface pressure is applied to the front part of the cylinder bore in order to ensure the sealing performance, due to the engine The rigidity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/08F02F11/00
Inventor 木下裕一安田纪章大贯卓吉岛一也
Owner TOYOTA JIDOSHA KK
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