Patent ID: 8387583

Claim:
An engine balancer provided in an oil pan located at a bottom of an engine, the engine balancer comprising: a pair of balancer shafts extending in a fore and aft direction of the engine and disposed side by side in a lateral direction of the engine, the fore and aft direction of the engine being parallel to a crankshaft, the lateral direction of the engine being orthogonal to the fore and aft direction and to a vertical direction of the engine; a plate-shape cover member; and a balancer housing for housing the pair of balancer shafts, wherein the balancer housing includes: a pair of front and rear bearing walls disposed in the fore and aft direction of the engine, a pair of left and right bearing holes respectively penetrating the pair of front and rear bearing walls and supporting the pair of balancer shafts with rolling bearings interposed therebetween, and a housing body located between the pair of front and rear bearing walls, the bearing walls of the balancer housing are attached to bearing walls for supporting the crankshaft provided in the engine, the housing body has an aperture at a top thereof, the aperture extends in the fore and aft direction and is disposed between the front and the rear bearing walls, the plate-shaped cover member, which is disposed between the front and the rear bearing walls, substantially covers the aperture, and the plate-shaped cover member is separate from and uniformly thinner than a member forming the housing body.