COATINGLESS CYLINDER HEAD GASKET

摘要

A multi-layer cylinder head gasket providing improved sealing performance, stability, and a more rigid joint between two components is provided. The gasket includes a plurality of functional layers each including a full bead located between an inner edge and outer edge and surrounding a combustion chamber opening. A stopper is disposed between the functional layers and is located radially between the combustion chamber opening and the full bead. A coating material is applied to at least one surface of at least one functional layer and extends along a majority of the length of the functional layer. To achieve the improved performance, a region along the surface located between the inner edge and the full bead remains uncoated, or includes a reduced amount of the coating material. Alternatively, the stopper can be located between the combustion chamber opening and the inner edges of the functional layers to provide the uncoated region.

主权项

1. A multi-layer gasket, comprising:
a first functional layer extending between a first inner edge surrounding a combustion chamber opening and a first outer edge, said first inner edge and said first outer edge presenting a length therebetween, said first functional layer presenting a first outer surface and an oppositely facing first inner surface, said first functional layer including a first full bead disposed radially between said first inner edge and said first outer edge, a second functional layer extending between a second inner edge surrounding said combustion chamber opening and a second outer edge, said second inner edge and said second outer edge presenting a length therebetween, said second functional layer presenting a second outer surface and an oppositely facing second inner surface, and said second functional layer including a second full bead axially aligned with said first full bead; a stopper disposed between said first and second functional layers and radially between said inner edge and said full bead of at least one of said functional layers; a coating material disposed on at least one of said surfaces of at least one of said functional layers, said coating material extending along a majority of said length of said at least one surface; and wherein a reduced amount of said coating material is disposed along a region of said at least one surface located between said inner edge and said full bead.