| 摘要 |
In a multi-cylinder engine, an inner space (17) is interposed between upper and lower female screws (9), (13) and an outer wall (14) of a cylinder block (6). Lower peripheral wall portions (15), (15) of a cylinder wall (1) continue with left and right both sides (2c), (2c) of a lower side portion (2b) of an inter-cylinder wall (2) in a front and rear direction and increase their thicknesses progressively as they approach the left and right both sides (2c), (2c).
|
