Power unit for motorcycle

Details Power unit for motorcycle Power unit for motorcycle

2008-06-19

2011-10-04

Kamen, Noah (Department: 3783)

Internal-combustion engines

Frame construction

Horizontal cylinder

C123S192200, C123S1960CP

Reexamination Certificate

active

08028669

ABSTRACT:
A power unit for a motorcycle includes an internal combustion engine provided with a crankcase rotatably supporting a crankshaft with an axial line extending in a vehicle-width direction. An oil pump is mounted on the crankcase with a balancer rotatably supported by the crankcase. Rotational power from the crankshaft is transmitted to a pump driven member provided on a pump shall of the oil pump and to a balancer driven member coaxially interlinked with and connected to the balancer so as to transmit power to the balancer. The power unit is downsized by bringing a balancer and an oil pump into a close arrangement. The pump driven member and the balancer driven member are offset from each other in a vehicle-width direction and are located at such a position so as to at least partially overlap each other as viewed from the side of the vehicle-width direction.

REFERENCES:
patent: 6659061 (2003-12-01), Nomura
patent: 2008/0081714 (2008-04-01), Ogasawara et al.
patent: 1491762 (2004-12-01), None
patent: 07063034 (1995-03-01), None
patent: 2001-065650 (2001-03-01), None
patent: 2003/085285 (2003-10-01), None
patent: 2005009465 (2005-01-01), None

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