Patent ID: 9261045
Filing Date: 2016-02-16
CPC Classification: F02B,F02F

Claim Text:
1. A casing structure of an internal combustion engine comprising an upper/lower divided crankcase structure in which a crankshaft and a first transmission shaft of a pair of transmission shafts parallel to the crankshaft of a transmission are supported at a dividing surface between an upper crankcase and a lower crankcase, an oil pan beneath the crankshaft having a bottom wall that is substantially horizontal when the internal combustion engine is installed for use in a vehicle, the dividing surface being inclined so that a second transmission shaft supported by the upper crankcase above the first transmission shaft is below the crankshaft when the bottom wall is substantially horizontal, a cylinder is formed in the upper crankcase so that a cylinder axial line is orthogonal to the dividing surface, and a balancer shaft supported by the lower crankcase on an opposite side portion of the lower crankcase as the first transmission shaft.