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US 2018/0003127 A1Published application
Engine and method of manufacturing cylinder block of engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKenichi SAKURAI
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AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKenichi SAKURAI
Estimating the term…
An engine includes a cylinder block including a cylinder hole, a crank shaft as an offset crank, and a connecting rod that connects the piston and the crank shaft. An inclined surface is provided on an entire circumference of a crank-shaft-side opening edge of one end of the cylinder hole. When viewed in the axial direction of the crank shaft, a boundary line between the inclined surface and the cylinder hole extends towards the other end of the cylinder hole as it extends toward an offset side on which the crank shaft is offset from the center axis of the cylinder hole. The offset crank engine has the entire circumference of the crank-shaft-side opening edge of the cylinder hole chamfered without any bad influence on the sliding surface and posture of the piston to avoid interference between the crank-shaft-side opening edge of the cylinder hole and the connecting rod.
An engine comprising:
A method of manufacturing a cylinder block of an engine, the engine including a cylinder block including a cylinder hole into which a piston is movably fitted, and a crank shaft including an axis offset from a center axis of the cylinder hole, the method comprising the steps of:
A method of manufacturing a cylinder block of an engine, the engine including a cylinder block including a cylinder hole into which a piston is movably fitted, and a crank shaft including an axis offset from a center axis of the cylinder hole, the method comprising the steps of:
Dependencies are inferred from the claim text.