Dry Sump Scavenge Pump System With Balance Shaft Capability For Application To Flat Plane V8 Engines

摘要

An internal combustion engine includes a balance shaft assembly having a housing mounted to the cylinder block wherein the housing supports a pair of balance shafts rotatably driven by the crankshaft. The pair of balance shafts rotate in opposite directions and each include a hollow tubular body with an internal eccentric mass. A first of the pair of balance shafts is drivingly connected to a drive sprocket at a first end and can include a first drive gear at a second end that is meshingly engaged with a first driven gear at an end of a second of the pair of balance shafts. A first oil pump is provided at the first end of the pair of balance shaft, and a second oil pump is provided at a second end of the pair of balance shafts. The gears of the oil pumps transfer torque between the pair of balance shafts.