Dana Corporation

Sealed Power Technologies, L.p.

Stephen H Hill

Joseph C Hamelink

Mark L Davis

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.

Cylinder liner with reduced wall thickness on piston pin axis

An engine crankcase bypass system includes a scavenging mechanism for the collection and removal of oil entrained in engine bypass gases that include unburned gasoline fuel and water vapors. The improved bypass system, designed to replace a standard PCV (positive crankcase ventilation) system, senses manifold and crankcase vacuum pressures, and via utilization of either an electronic or mechanical valve provides continuous adjustments of bypass gas flows for the maintenance of a constant gas flow sufficient to exceed normal engine bypass flow rates. A deflector system positioned in a flow stream is designed to extract and separate oil vapor from unburned gasoline fuel and water vapors entrained in the bypass gases. The oil is collected and drained to a temporary reservoir for subsequent re-entry into the oil sump of the engine. The fuel and water vapors are immediately returned to the intake manifold of the engine for reburning of the fuel.

Crankcase bypass system with oil scavenging device

An oil separator positioned in the positive crankcase ventilation (PCV) system adjacent the engine such that the oil separator is subjected to a predetermined minimum operating temperature. The oil separator comprises an opening through which the oil, fuel and water particles pass with the gas stream. The oil separator is constructed and arranged to cause the oil particles to strike an impactor plate and be separated from the gas flow while fuel and water particles pass on through the system and re-enter the engine.

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Muskegon, MI, United States of America

Stephen H Hill