Patent ID: 7258095

Claim:
An oil supply apparatus for an engine, comprising: an oil pan configured and dimensioned to be disposed beneath the engine to store oil therein; an oil pump mounted in the oil pan to pump the oil stored in the oil pan; and a chain-drive unit configured for mounting between the oil pump and a crankshaft of the engine to transmit a rotating force of the crankshaft to the oil pump, the chain-drive unit mounted partially immersed in the oil stored in the oil pan; wherein the oil pan includes: an upper oil pan configured and dimensioned for coupling to a lower end of the engine in a sealing manner; and a lower oil pan coupled to a lower end of the upper oil pan in a sealing manner, the oil being stored in the lower oil pan; and wherein the upper oil pan includes: a guide portion having a downwardly inclined bottom surface to guide oil dropped from the interior of the engine into the lower oil pan; and a pocket portion perforated at an end of the guide portion while being coupled to the lower oil pan, the oil pump and the chain-drive unit being mounted in the pocket portion.