Lubricating apparatus for an internal combustion engine

摘要

A lubricating apparatus for an internal combustion engine includes an oil pump 12 comprising a feed pump 13 and scavenging pumps 14 and 15 . Then oil pump 12 and an oil tank 16 are arranged at the outside of the internal combustion engine 9 . A pump shaft for the pumps 13, 14 and 15 can be arranged in a same direction as that of a crank shaft of the engine 9 . The feed pump 13 and two scavenging pumps 14 and 15 are arranged in serial order with the feed pump being farthest from the engine 9 . A check valve 24 can be arranged in a passage of the discharge side of the feed pump 13 . A relief valve 23 can be arranged between a passage of the discharge side of the feed pump 13 and a passage of the intake side of the scavenging pump 14.