Power transmission system for snowmobile
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKazutaka Fukuda
Life of this patent
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Abstract
A snowmobile having an improved power transmission system that is comprised of a split engine having two cylinder blocks each containing at least a pair of cylinders with their output shafts connected to each other. A belt drive shaft is journaled by the engine assembly and is driven off the output shafts at the point where they are joined together. The belt drive shaft drives the drive belt of the snowmobile through a variable pulley transmission.
Claims35
A snowmobile having a body, a drive belt positioned beneath said body and supported by said body for propelling said snowmobile, an engine compartment formed by said body, an internal combustion engine mounted on said body in said engine compartment with a two piece output shaft rotatable about an axis disposed transversely to the longitudinal axis of said snowmobile, a pair of drive means each comprising a plurality of spaced combustion driven devices having a driving connection to a respective piece of said engine output shaft at spaced positions along the length of said engine output shaft, a splined connection interconnecting said pieces of said engine output shaft, a belt drive shaft supported for rotation about an axis parallel to the axis of said engine output shaft, means for driving said belt drive shaft directly from said splined connection and between a pair of adjacent combustion driven devices, and means for driving said drive belt from said belt drive shaft which means places an axial load on said belt drive shaft.
Dependencies are inferred from the claim text.