| 摘要 |
PURPOSE:To prevent blowby by providing notch parts in case-flange parts and a lower cover part, and providing engaging parts engaging the notch parts on an upper cover part. CONSTITUTION:Notch parts 22a, 22b, 24a, 24b are provided so as to respectively correspond to case-flange parts 14a, 14b of a case 8 and flange parts 12a, 12b of a lower cover 6. Engaging parts engaging the notch parts are provided respectively on flange parts 10a, 10b of an upper cover 4. Since the temperature differential between the case part and the case-flange parts can allow the case to thermally deform in the longitudinal direction, blowby of exhaust gas can thus be prevented. |
