Patent ID: 8899206

Claim:
A balancing device for an engine, comprising: a crankshaft for converting reciprocal motion of a piston of the engine to rotary motion; at least one electromagnetic force generator mounted and aligned on an imaginary horizontal line passing a rotation axis of the crankshaft at both left and right sides of the crankshaft with respect to the rotation axis of the crankshaft and generating an electromagnetic force; a control portion controlling the electromagnetic force generator that is mounted at an interior circumference of a crank case of an engine cylinder block to generate an electromagnetic force offsetting an unbalanced force occurring according to a rotational position of the crankshaft by directly engaging the crankshaft via the electromagnetic force of the electromagnetic force generator; and a position sensor detecting the rotational position of the crankshaft and transmitting the rotational position of the crankshaft to the control portion; wherein the electromagnetic force generator has a solenoid.