US 2006/0232017 A1 · Metal gasket for cylinder head

Abstract

A metal gasket for a cylinder head has two base plates each constructed from a metal plate and layered over each other, an auxiliary plate constructed from a metal plate and interposed between the base plates, and hard metal-plated layers. The base plates each have cylinder holes, annular beads, coolant holes, and an outer peripheral bead. The cylinder holes correspond with the bore of each cylinder. The annular beads have an angled cross-sectional shape. The coolant holes correspond with a coolant jacket of the cylinder block and with a coolant hole of the cylinder head. The outer peripheral bead has a cross-sectional shape sloping on one side and surrounds the beads and the coolant holes. Each of the layers is extended from a position more radially inward than an annular bead of a base plate to a position radially outward.

Claims20

Dependent claims

A metal gasket for a cylinder head comprising:

two base plates (2) respectively made of metal plates and layered over each other, each of said base plates (2) including cylinder holes (2a) formed so as to correspond to respective cylinder bores on a cylinder block of an internal combustion engine, annular beads (2b) of an angled cross-sectional shape formed around said respective cylinder holes, coolant holes (2c) formed on outer peripheral portions of said respective annular beads so as to correspond to coolant jackets on said cylinder block and to coolant holes on a cylinder head of said internal combustion engine, and an outer peripheral bead (2d) having a cross-sectional shape sloping on one side and being formed in a position so as to totally surround said annular beads and said coolant holes;
an auxiliary plate (3) made of a metal plate and interposed between said two base plates;
and
a hard metal-plated layer (5) formed on at least one surface of said auxiliary plate and configured to extend from a position more radially inward than said annular bead to a position radially outward so as to overlap each of said annular beads of said base plate and to face a top portion of said annular bead, and thereby to surround each of said cylinder holes on said base plate annularly.

1 more element

A metal gasket for a cylinder head comprising:

two base plates (2) respectively made of metal plates and layered over each other, each of said base plates (2) including cylinder holes (2a) formed so as to correspond to respective cylinder bores on a cylinder block of an internal combustion engine, annular beads (2b) of an angled cross-sectional shape formed around said respective cylinder holes, coolant holes (2c) formed on outer peripheral portions of said respective annular beads so as to correspond to coolant jackets on said cylinder block and to coolant holes on a cylinder head of said internal combustion engine, and an outer peripheral bead (2d) having a cross-sectional shape sloping on one side and being formed in a position so as to totally surround said annular beads and said coolant holes;
an auxiliary plate (3) made of a metal plate and interposed between said two base plates;
a metal foil layer (5) made of a metal foil (6) to be attached onto at least one surface of said auxiliary plate and configured to extend from a position more radially inward than said annular bead to a position radially outward so as to overlap each of said annular beads of said base plate and to face a top portion of said annular bead and thereby to surround each of said cylinder holes on said base plate annularly;
and
an adhesive layer (7) made of an adhesive to attach said metal foil to said auxiliary plate while at least being pressurized.

2 more elements

Dependencies are inferred from the claim text.

Metal gasket for cylinder head

Life of this patent

Metal gasket for cylinder head

Life of this patent

Abstract

Claims20