| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piston valve not projecting into a combustion chamber during an intake stroke, an exhaust stroke or the like, since the conventional piston valve projects into the combustion chamber during the intake stroke, the exhaust stroke or the like, and the shape of the combustion chamber or the lifting amount of the valve is limited as a result. <P>SOLUTION: The piston valve 1 retreats when seen from the combustion chamber during the intake stroke, the exhaust stroke or the like. Since the piston valve does not project into the combustion chamber during the intake stroke, the exhaust stroke or the like, such a combustion chamber is formed that the lifting amount of the valve does not need to be taken into account. <P>COPYRIGHT: (C)2012,JPO&INPIT |
