Taiho Kogyo Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Other

Nippon Gasket Company, Ltd.

Osamu Jinno

Yukio Kawai

Takeshi Kitamura

Yoshiyuki Hagiwara

Kenichi Yamaguchi

Akio Kuramoto

Hirotaka Kakuta

Tatsuhiko Fukuoka

Hideo Nakamura

Seiji Omura

Eisaburo Goto

Tatsuya Kawakita

Kazuya Nakata

Masanori Kusano

A cylinder head gaskethas a gas seal plate Pin which a combustion chamber holeis drilled, an oil seal plate Pin which an oil holeis drilled, and a main plate Pprovided between the gas seal plate and the oil seal plate. Plate thicknesses of the gas seal plate, the oil seal plate, and the main plate are made different from each other, the plate thickness of the gas seal plate is larger than the plate thicknesses of the oil seal plate and the main plate, and end portions of the gas seal plate, the oil seal plate, and the main plate are connected to each other. A combustion gas, lubricant oil or the like from a combustion chamber or an oil passage can be effectively sealed, and the cylinder head gasket can be manufactured inexpensively.

Cylinder head gasket

A cylinder head gasket includes a pair of first and second gasket substrates. The gasket substrates are each formed with a first and a second projection which project in opposite directions, with a clearance therebetween. According to a first aspect of the invention, each projection undergoes a plastic deformation toward the clearance defined between them when the gasket substrates are held sandwiched between a cylinder head and a cylinder block, each projection undergoing a magnitude of plastic deformation which is greater or lesser in accordance with the magnitude of a surface pressure therebetween. According to a second aspect of the invention, each projection is formed with a radially central part which projects toward the radially central part of the other projection and which is in close contact with each other continuously in the circumferential direction.

A method of manufacturing a metal gasket having a base plate and coating layers deposited thereon. A first coating layer (10) having a first vulcanizing agent is deposited on a metallic base plate (1). A second coating layer (20) is deposited on the first coating layer (10) and has a second vulcanizing agent. The first coating layer (10) and the second coating layer (20) are vulcanized with different vulcanized rates from each other. For instance, a cold type vulcanizing coating layer, which is vulcanized at an ordinary temperature, and a hot type vulcanizing coating layer, which is vulcanized at a higher temperature than the ordinary temperature, are formed, and heated at a predetermined temperature to vulcanize only the former, so that two layers having different vulcanized rates from each other are formed to provide a vulcanized layer and an unvulcanized layer on the base plate.

Method of manufacturing a metal gasket

The invention is directed to an arrangement for sealing a clearance between a cylinder head and a cylinder block of an engine with a metal gasket clamped therebetween. The metal gasket is formed of a metallic base plate which has a plurarity of openings and beads formed therearound. The base plate may include annular shims welded on the base plate around the openings and a resilient sealing member deposited on the base plate surrounding the openings. The gasket may be disposed in such a manner as to place tip ends of the beads toward the cylinder block which causes a smaller displacement relative to the beads in comparison with the cylinder head. The resilient sealing member may be arranged to have a section of different dimension between a portion located at a side facing the beads and other portion at the opposite side thereof, or between a portion located at a junction where two of the beads meet and other portion.

Metal gasket

A metal gasket having first and second base plates made of metal. In each base plate, at least an opening is defined and a bead is formed around the opening. The second base plate is disposed in parallel with the first base plate with the tip ends of the beads of the first and second base plates facing each other. An annular metallic shim is secured to the first base plate at the side of the bead between the inner periphery of the bead and the opening. And, a resilient sealing member is deposited on the second base plate at the side of the bead around the outer periphery of the bead. A non-vulcanized coating layer of fluoro rubber containing no vulcanizing agent may be deposited on the entire surface of the second base plate at the side of the bead. A vulcanized fluoro rubber may be deposited on the non-vulcanized coating layer at the side of the bead around the outer periphery of the bead.

Metal gasket with base plate having coatings of diverse thicknesses

The invention is directed to an arrangement for sealing a clearance between a cylinder head and a cylinder block of an engine with a metal gasket clamped therebetween. The metal gasket is formed of a metallic base plate which has a plurality of openings and beads formed therearound. The base plate may include annular shims welded on the base plate around the openings and a resilient sealing member deposited on the base plate surrounding the openings. The gasket may be disposed in such a manner as to place tip ends of the beads toward the cylinder block which causes a smaller displacement relative to the beads in comparison with the cylinder head. The resilient sealing member may be arranged to have a section of different dimension between a portion located at a side facing the beads and other portion at the opposite side thereof, or between a portion located at a junction where two of the beads meet and other portion.

A metal gasket having a base plate and coating layers deposited thereon. A first coating layer (10) having a first vulcanizing agent is deposited on a metallic base plate (1). A second coating layer (20) is deposited on the first coating layer (10) and has a second vulcanizing agent. The first coating layer (10) and the second coating layer (20) are vulcanized with different vulcanized rates from each other. For instance, a cold type vulcanizing coating layer, which is vulcanized at an ordinary temperature, and a hot type vulcanizing coating layer, which is vulcanized at a higher temperature than the ordinary temperature, are formed, and heated at a predetermined temperature to vulcanize only the former, so that two layers having different vulcanized rates from each other are formed to provide a vulcanized layer and an unvulcanized layer on the base plate.

Metal gasket having first and second diversely vulcanized coatings

The invention is directed to an arrangement for sealing a clearance between a cylinder head and a cylinder block of an engine with a metal gasket clamped therebetween. The metal gasket is formed of a metallic base plate which has a plurality of openings and beads formed therearound. The base plate may include annular shims welded on the base plate around the openings and a resilient sealing member deposited on the base plate surrounding the openings. The gasket may De disposed in such a manner as to place tip ends of the beads toward the cylinder block which causes a smaller displacement relative to the beads in comparison with the cylinder head. The resilient sealing member may be arranged to have a section of different dimension between a portion located at a side facing the beads and other portion at the opposite side thereof, or between a portion located at a junction where two of the beads meet and other portion.

Metal gasket with welded shim

Resin bearing material consists essentially of at least one thermoplastic resin material selected from the group consisting of polyacetal, polyamide, polycarbonate, polyphenylene sulfide, polyethylene terephthalate, and ultra-high molecular weight polyethylene, and of aromatic group, polyamide fiber, and is produced by the steps comprising kneading fand extruding said at least one thermoplastic resin material and the cutting the extruded material. The sliding characteristics are superior to the conventional oleo-bearing materials containing the carbon fiber, and glass fiber.

Bearing resin material

Resin bearing material consists essentially of at least one thermoplastic resin material selected from the group consisting of polyacetal, polyamide, polycarbonate, polyphenylene sulfide, polyethylene terephthalate, and ultra-high molecular weight polyethylene, and of aromatic group, polyamide fiber, and is produced by the steps comprising kneading and extruding said at least one thermoplastic resin material and the cutting the extruded material. The sliding characteristics are superior to the conventional oleo-bearing materials containing the carbon fiber, and glass fiber.

Growing community of inventors

Nagoya, Japan

Osamu Jinno