CPC F02F 11/002 (2013.01) [B21D 53/84 (2013.01); B32B 3/04 (2013.01); B32B 3/08 (2013.01); B32B 3/266 (2013.01); B32B 15/015 (2013.01); F16J 15/0818 (2013.01); B32B 2581/00 (2013.01)] | 18 Claims |
1. An engine head gasket comprising:
a base layer having a base layer inner edge extending circumferentially around a cylinder opening defining a center axis, and a base layer outer edge;
an upper layer including an upper layer inner edge extending circumferentially around the cylinder opening and set back from the base layer inner edge;
a lower layer including a lower layer inner edge extending circumferentially around the cylinder opening and set back from the base layer inner edge;
an anti-preignition wrap defining the cylinder opening and wrapped around the base layer inner edge so as to extend into an upper setback zone defined radially between the base layer inner edge and the upper layer inner edge and a lower setback zone defined radially between the base layer inner edge and the lower layer inner edge;
a fluid transfer opening extending through the engine head gasket at a location radially outward of the cylinder opening;
a diameter of the cylinder opening is greater than a diameter of the fluid transfer opening; and
a summed layer thickness through the base layer, the upper layer, and the lower layer, is greater than a summed layer thickness through the base layer and the anti-preignition wrap.
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