Crankshaft balancing mechanism for a variable compression engine

Details Crankshaft balancing mechanism for a variable compression engine Crankshaft balancing mechanism for a variable compression engine

1992-01-28

1993-01-12

Wright, Dirk

Machine element or mechanism

Elements

Pitmans and connecting rods

123 78F, G05G 100

Patent

active

051780380

ABSTRACT:
A crankpin on the crankshaft of a variable compression engine carries an eccentric bushing which is positionable about the crankpin axis to determine the length of piston stroke. To counteract the relocation of the bushing center of gravity counterweights are rotatably housed in a counterbalance of the crankshaft. Partial rotation of each counterweight shifts their centers of gravity with respect to the crankshaft axis of rotation to achieve crankshaft balancing. For positioning of the counterweights coincident with shifting of the eccentric bushing the same are shown coupled with gears. Positioning of the eccentric bushing to change piston stroke of the engine is by a motor responsive to a microprocessor and engine performance criteria.

REFERENCES:
patent: 4887560 (1989-12-01), Heniges

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