NOISE INSULATING STRUCTURE FOR ENGINE

摘要

An internal combustion engine comprises a reinforcing arrangement secured to an edge portion of a lower opening of the cylinder block at a peripheral edge portion. The reinforcing member has a plate-like shape, has connecting parts extending laterally with respect to the directon of the engine for connceting the facing edge portions of the lower opening of the cylinder block and is formed with openings for passage of oil at the front portion and is secured to an oil pan at the lower surface of its front portion. The rear portion of the reinforcing member forms a part of an outer lower wall of a crank case contg. a crank shaft. It bifurcates into an upper branch extending backwardly and upwardly and a lower branch extending backwardly and downwardly.