Method for using two connecting rods per piston on an opposed piston engine.

Name of the inventor or inventors:
Brendan Lenski

Date of invention:
30 September 2009

Internal combustion engines require connecting rods to actuate its pistons; conventional engines use one connecting rod per piston. In the opposed piston internal combustion engine, when a crank shaft is located astride the cylinder, multiple connecting rods are required per piston.

Existing solution(s) use three or four connecting rods to connect the crankshaft to the pistons in an opposed piston engine. The proposed method allows the number of connecting rods per piston to be reduced to two.

By supporting the piston pin asymmetrically with the forked and of the connecting rod, only two connecting rods per piston are necessary to connect the piston to the crankshaft. This method does not require that the connecting rod be bent in a plane through the small end axis and big end axis of the connecting rod. This method also allows for the upper and lower connecting rod designs to be identical. There are two variations to this method that differ in which crankpin is connected to the small end.