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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsMasakazu Yamazaki, Fuminori Kawashima, Shinji Yamada, Chiharu Shimizu
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A secondary balancer device provided below a cylinder block of an engine including a front balancer shaft and a rear balancer shaft which are rotated in opposite directions and have longitudinally central main journal portions carried in a balancer holder, respectively. Bracing journal portions are provided on axial ends of one of the front and rear balancer shafts and supported in a pump body and a pump cover of an oil pump provided below the cylinder block, respectively. A pump shaft of the oil pump and the front balancer shaft are connected to a crankshaft by a common endless chain and rotated at different numbers of revolutions. Thus, the number of parts for supporting the balancer shafts can be reduced, while maintaining the freedom of setting the number of revolutions of the oil pump of the engine.
A balancer shaft supporting structure in an engine including a balancer shaft disposed below a cylinder block, said balancer shaft supporting structure comprising an oil pump disposed below the cylinder block, said balancer shaft and a pump shaft of said oil pump being driven independently and disposed substantially coaxially with each other in a separated manner, at least one end of said balancer shaft being supported by a pump housing of said oil pump.
Dependencies are inferred from the claim text.