Patent ID: 6260532
Filing Date: 2001-07-17
Classification: F02B,F02F

Abstract:
A variable compression ratio engine with an adjustable valve timing having an engine housing and a crankshaft having a crankshaft axis of rotation,a first crankshaft axis position relative to said housing, and a second crankshaft axis position relative to said housing, andone or more eccentric main bearing supports, rotatably mounted in said housing about an eccentric pivot axis in said housing, for adjusting said crankshaft axis from said first crankshaft axis position to said second crankshaft axis position,a drive gear mounted on said crankshaft, and a driven gear mounted on a secondary shaft having a second shaft axis of rotation, said second shaft axis of rotation being fixed in said housing, said drive gear being in mesh with said driven gear, said drive gear and said driven gear having a first mesh direction and a first mesh location,a first intake valve and a camshaft having a camshaft drive, said secondary shaft drives said camshaft drive, and said camshaft opens said intake valve,wherein said first mesh direction points generally away from said first intake valve, said first crankshaft axis position being closer to said first valve than said second crankshaft axis position, said camshaft has a first phase timing relative to said crankshaft at said first crankshaft axis position, and said camshaft has a second phase timing relative to said crankshaft at said second crankshaft axis position,wherein said intake valve has a later timing of opening relative to said crankshaft at said first crankshaft axis position than at said second crankshaft axis position,wherein said first mesh location is located between said eccentric pivot axis and said second shaft axis of rotation.