Ford Global Technolgoies, LLC

Klaus P Kuepper

Bernd Steiner

Stefan Quiring

Harald Stoffels

Jonathan Gregory

Systems and methods for reducing inertial forces of a reciprocating piston internal combustion engine are described. The systems and methods may provide for counterweights in a form of pistons in cylinders that are moved via electromagnets. The counterweights may be moved at a frequency that corresponds to engine speed via an alternating current.

Device for compensating free inertia forces of a reciprocating piston internal combustion engine

A counterweight arrangement for an internal combustion engine with three cylinders. The internal combustion engine having a crankshaft rotating about an axis of rotation, with three cranks which succeed one another in the axial direction with respect to the axis of rotation and are distributed at angular intervals of 120&#xb0; and each crank corresponding to a respective cylinder, the counterweight arrangement including at least two counterweights for at least partial compensation of inertia forces caused by rotating masses on the crankshaft, wherein exactly two counterweights are provided for the two outer cranks, at least one of the two counterweights being arranged in a position which is rotated about the crankshaft axis with respect to an assigned crank through angle (&#x3b1;), the amount of which differs from 30&#xb0;+N*180&#xb0;, N being equal to a natural number or equal to zero.

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Dormagen, Germany

Klaus P Kuepper