| 摘要 |
PURPOSE:To improve the combustion stability and obtain high output by forming the primary intake port and an auxiliary intake port in one side housing and forming the secondary intake port in the other side housing. CONSTITUTION:In one side housing 14, the primary intake port 21 of the primary intake system 18 and an auxiliary intake port 22 of a supercharge intake system 20 are formed. In the other side housing 15, the secondary intake port 23 of the secondary intake system 19 is formed. Since the both intake ports 21 and 22 are not opened at a same time, a leak passage for the communication from the compression cycle side of a combustion chamber 16 to the intake cycle side through the ports 21 and 22 is removed, and blowing-by can be eliminated. Thus, the combustion stability with a low load can be improved, and the high output can be obtained. |
