Patent ID: 8893682

Claim:
A multi-cylinder internal combustion engine comprising: a plurality of independent crank chambers formed by partitioning a crankcase by a plurality of support walls which are provided integrally with the crankcase and support a crankshaft, the support walls are formed by coupling lower support walls provided in a lower crankcase with upper support walls provided in an upper crankcase respectively, and one of the support walls is an inner wall which is located between two of the crank chambers; and a plurality of oil outflow holes which respectively communicate with the crank chambers and through which oil is discharged from each of the crank chambers, the plurality of oil outflow holes including a left outflow hole and a right outflow hole respectively located adjacent to left and right sides of the lower support wall of the inner wall, the left outflow hole being formed with an end projecting toward a left outer side in a vehicle width direction, and the right outflow hole being formed with an end projecting toward a right outer side in the vehicle width direction, wherein each of the left and right outflow holes extends in a front-to-rear direction of the engine from a position directly under the crankshaft to a position rearward of journal bolts that are located rearward of a centerline of the crankshaft, and each of the right and left outflow holes extends further in the front-to-rear direction of the engine than in a width direction of the engine.