| 摘要 |
A multi-layer steel (MLS) cylinder head gasket includes a unitary stopp er Layer interposed between mirror image beaded outer layers. A stopper ring situated about the boundary of a combustion opening on the stopper layer is formed by folding over the boundary edge of the, stopper layer material. The stopper ring pre- stresses the gasket interface about the combustion opening during securement of a cylinder head to an engine block. The stopper layer includes at least one raised epox y bead structure, circumferentially and closely surrounding the outside edge of the stopper ring. The epoxy bead acts to spread load, and hence to avoid point loads at the combustion aperture boundary. The epoxy bead is applied to the gasket by screen- printing, and may incorporate a powdered metal for limiting bead resiliency. The bead height is greater than the thickness of the stopper ring, to reduce ris k of splitting the stopper layer material.
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