Engine construction
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorYasuyuki Matsuno
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Abstract
An improved and compact accessory drive for an engine that facilitates transverse positioning in an engine compartment. One end of the engine crankshaft extends through an outer face of the engine body. A torsional damper is affixed to this crankshaft end. An accessory drive pulley is driven by a shaft that is juxtaposed to this end of the crankshaft and which is disposed axially from the torsional damper. Adjacent surfaces of the torsional damper and accessory drive pulley have mating tapered surfaces so that these elements overlap both axially and radially. A drive belt drives a plurality of engine accessories from this drive pulley so as to maintain case of access to the drive belt while maintaining a compact overall length.
Claims8
An internal combustion engine and accessory drive therefore, said engine being comprised of an engine body in which a crankshaft is supported for rotation about a longitudinally extending axis, one end of said crankshaft extending outwardly from one end of said engine body, a torsional damper affixed to said one end of said crankshaft, an accessory drive shaft driven by said engine crankshaft about a parallel, juxtaposed axis, said accessory drive shaft having an end that it is disposed adjacent said one end of said engine, and an accessory drive pulley affixed to said end of said accessory drive shaft and axially spaced from said torsional damper, the diameters of said torsional damper and of said accessory drive pulley being such that they overlap each other when viewed in an axial direction.
Dependencies are inferred from the claim text.