| 摘要 |
A blowby gas-returning structure for an engine which is adapted to provide smooth returning of a blowby gas, and to provide a light-weight or compact engine. The blowby gas-returning structure is provided with passage-forming object or wall in order to continue blowby gas passages without interruption. Further, the cylinder block may be provided with void space sections which share space with the blowby gas passages and the cylinder head-mounting bolt holes. In addition, the blowby gas passage in the cylinder head may be disposed offset substantially midway along the length thereof.
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