Patent ID: 7600500
Filing Date: 2009-10-13
Classification: F01M

Abstract:
1. A lubricating system for an internal combustion engine, comprising: an oil tank provided in an engine body having a crankcase which rotatably bears a crankshaft fitted with a centrifugal clutch at one end portion thereof and which defines a crank chamber; a feed pump for supplying oil in said oil tank to a portion to be supplied with the oil of said engine body; and a scavenging pump for returning the oil collecting in a bottom portion of said crank chamber into said oil tank; a wall portion partitioning the inside of said oil tank and said clutch containing chamber from each other is provided with an opening portion for communication between said clutch containing chamber and the inside of said oil tank; and said opening portion is located on the outer side relative to the outermost rotational locus of said centrifugal clutch as viewed in the direction along the axis of said crankshaft,