Powertrain assembly including modular transmission

Details Powertrain assembly including modular transmission Powertrain assembly including modular transmission

2007-04-03

2007-04-03

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

Reexamination Certificate

active

10925223

ABSTRACT:
A powertrain assembly having an improved engine configuration includes an engine and a transmission incorporated in a crankcase of the engine. The engine also comprises an oil pump and a water pump. The transmission is a cartridge-type shift drum transmission, which can be attached to or detached from a transmission attachment face which is a side face of the crankcase. The oil pump and the transmission attachment face are arranged in substantially non-overlapping relation in the side view of the engine. The water pump shaft is substantially coaxial with the oil pump shaft, and the water pump is positioned below a drive sprocket on the transmission countershaft so as to be overlapping while eliminating interference between them, allowing a close arrangement of components.

REFERENCES:
patent: 5216989 (1993-06-01), Iwata et al.
patent: 6631703 (2003-10-01), Tonnqvist et al.
patent: 7055487 (2006-06-01), Kawakubo et al.
patent: 2005/0087032 (2005-04-01), Kawakubo et al.
patent: 62-34950 (1987-07-01), None
patent: B 7-99086 (1995-10-01), None
patent: 3040361 (2004-05-01), None

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