Patent ID: 7191871

Claim:
A lubricating system for an engine, said lubricating system comprising: an oil pump connected to an oil filter via a discharge port of the oil pump; a main gallery being connected to the discharge port of the oil pump via the oil filter, wherein said main gallery is provided in a crankcase of the engine; a sub-gallery for leading oil to a cylinder head side of the lubricating system, said sub-gallery being provided in said crankcase in such a manner as to be operatively connected to an outlet of said oil filter and in parallel to said main gallery; an oil cooler operatively connected to said sub-gallery and said main-gallery, wherein oil flowing through said main gallery is in parallel flow to oil flowing in said sub-gallery, and wherein a center line of said sub-gallery, a center line of said main gallery, a center line of a communication passage for communicating said outlet of said oil cooler to said main gallery, and a center axis of said oil filter and a center axis of said oil cooler are all located within the same plane.