Patent ID: 8418669

Claim:
An internal combustion engine, comprising: a cylinder block defining a bank of cylinders and including a crankcase; a cylinder head attached to an end of the cylinder block remote from the crankcase; a crankshaft rotatably supported by the crankcase; a first and second balancer shaft extending in parallel with the crankshaft on either side thereof at positions intermediate between the crankshaft and cylinder head; at least one auxiliary device having a drive shaft extending in parallel with the crankshaft; a first gear fitted on the crankshaft; a second and third gear fitted on the first and second balancer shafts; a fourth gear fitted on the drive shaft of the auxiliary device; a first transmission gear meshing with both the first and second gears; and a second transmission gear meshing with both the first transmission gear and second gear; wherein the fourth gear is actuated by the first gear via one of the second gear and third gear.