ENGINE AND METHOD OF MANUFACTURING CYLINDER BLOCK OF ENGINE |
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| 申请号 | US15640634 | 申请日 | 2017-07-03 | 公开(公告)号 | US20180003127A1 | 公开(公告)日 | 2018-01-04 |
| 申请人 | YAMAHA HATSUDOKI KABUSHIKI KAISHA; | 发明人 | Kenichi SAKURAI; | ||||
| 摘要 | 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. | ||||||
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| 说明书全文 | |||||||
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