Patent ID: 7104242

Claim:
An internal combustion engine, comprising: a crankcase; an oil pump; an oil storage chamber provided in the crankcase and disposed at a lower portion of the internal combustion engine; and an oil supply pipe having a pickup port disposed proximate the bottom of the oil storage chamber for drawing in oil stored in the oil storage chamber using the oil pump; wherein the oil storage chamber comprises a first subchamber having an opening on top thereof for receiving the oil supply pipe, and a second subchamber disposed adjacent the first subchamber so as to communicate therewith at the side thereof; a partitioning wall is provided between the first subchamber and the second subchamber, said partitioning wall comprising a portion extending substantially vertically and having an open and unobstructed communicating port formed in a rear portion thereof for establishing communication therebetween the first subchamber and the second subchamber; and the second subchamber comprises a ceiling wall located below a full oil level of the first subchamber.