Flat multi-layer metallic seal, e.g. a cylinder head gasket, has structured passage holes in the upper and lower layers to be aligned according to the required flow cross section

摘要

The flat multi-layer metallic seal has at least two overlaid layers (1,2), with matching passage zones and at least one passage opening (11,11') in the first zone at one layer. At least one hole (3,3') in the first layer has a given length and width over a hole (4) in the second layer. At least one further hole (4') in the second layer has a shorter length. It can have a width (W) with a maximum width extension larger than the width of the upper holes or more than the gap (D) between the upper holes.