Patent ID: 8925501
Filing Date: 2015-01-06
Classification: F02B,F02M,F16C,Y02T,Y10T

Abstract:
1. A crankshaft for an internal combustion engine comprising: at least four main journals aligned on a crankshaft axis of rotation; and at least three crankpins, each disposed about a respective crankpin axis and positioned between the main journals; each of the respective crankpin axes being oriented parallel to, and spaced radially from, the crankshaft axis of rotation; each of the crankpins being joined to a pair of crank arms for force transmission between the crankpin and the pair of crank arms; each pair of crank arms being joined to a respective main journal for transmitting torque between the pair of crank arms and the main journal; at least two of the crankpins being spaced radially a first semi-stroke distance from the crankshaft axis of rotation, and a third crankpin being spaced radially a second semi-stroke distance from the crankshaft axis of rotation, wherein the first semi-stroke distance differs from the second semi-stroke distance.