Patent ID: 6557516
Filing Date: 2003-05-06
Classification: F01M,F02B

Abstract:
An engine unit for a vehicle, comprising an engine case in which a crankshaft and a counter shaft are rotatably supported and an oil pump is provided so that rotation of the crankshaft is transmitted to the counter shaft at a reduced speed, wherein said counter shaft is arranged so as to serve as a driving shaft of the oil pump which is arranged coaxial with the counter shaft, said oil pump has a pump case, which is provided with a tubular engaging member concentrically surrounding the counter shaft so as to extend in an axial direction thereof and with a discharge passage extending so as to be apart from the counter shaft in the axial direction thereof, said tubular engaging member being fitted into a fitting hole for a counter shaft bearing, which is arranged on the engine case side, and said discharge passage having an end portion fitted into an oil supply port formed in the engine case.