Four wheel drive vehicle
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorToshikazu Sugiura
Life of this patent
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Abstract
A four-wheel drive vehicle includes a crankshaft that obtains the power of the engine. The rotation driving force of the crankshaft is transmitted to a secondary shaft through a belt type continuously variable transmission. The rotation driving force of the secondary shaft is transmitted to a rear wheel by a second drive shaft. A cam chain is arranged between the crank web of the crankshaft and the driving pulley of the belt type continuously variable transmission. The second drive shaft is arranged between the crank web and the driving pulley and under the cam chain. The second drive shaft is arranged to at least partly overlap the rotation trajectory C1 of the driving pulley when seen in a side view.
Claims9
A four-wheel drive vehicle comprising:
- a two-cylinder engine;
- a front wheel arranged to rotate due to a driving force of the engine;
- a rear wheel arranged to rotate due to the driving force of the engine;
- a crankshaft arranged in a widthwise direction of the vehicle to receive the driving force of the engine;
- a secondary shaft arranged parallel or substantially parallel to the crankshaft;
- a belt continuously variable transmission arranged to couple a first axial end of the crankshaft and a first axial end of the secondary shaft and to transmit a rotation of the crankshaft to the secondary shaft;
- a cam chain arranged between a crank web of the crankshaft and the belt continuously variable transmission;
- and
- a drive shaft arranged under the cam chain and at least partly overlapping a pulley in the continuously variable transmission when seen in an axial direction of the crankshaft to transmit rotation of the secondary shaft to the front wheel and the rear wheel.
Dependencies are inferred from the claim text.