| 摘要 |
PROBLEM TO BE SOLVED: To discharge the air exhausted from cylinders properly and easily prevent a situation where an exhaust valve is not kept closed, in a structure where exhaust passages extended from two of a plurality of cylinders are connected to each other.SOLUTION: A first exhaust port 10 extended from a first cylinder #1 and a fourth exhaust port 40 extended from a fourth cylinder #4 are connected to each other. A diameter of the first exhaust port 10 is made larger than a diameter of the fourth exhaust port 40. The fourth exhaust port 40 is connected to a side of the first exhaust port 10. |
