Dana Corporation

Mark L Davis

Stephen H Hill

A cylinder liner has reduced wall thickness in a piston pin plane of the liner. A conventional wall thickness of the cylinder liner is maintained in piston thrust plane regions of the liner, where side-to-side motions of a piston reciprocating within the liner tend to produce deflections of the liner, and of a head gasket which bears against the liner. The piston pin plane of the liner is normally orthogonal to the piston thrust plane. The reduced wall thickness affects only external dimensions of the liner; the interior bore of the liner remains fully cylindrical. The exterior of the liner is slightly elliptical, having its minor axis aligned with the plane of the piston pin. The reduced exterior dimension permits an engine designer to reduce engine length due to shortened bore spacing requirements along the piston pin plane, and or to enlarge the space for coolant flow between individual liners.

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Southgate, MI, United States of America

Mark L Davis