| 摘要 |
<p>A piston assembly comprising a housing (H) provided with an assembly of rotating pistons, preferably at least a pair of rotating pistons (PP1, PP2) forming air-tight chambers (C1, C2, C3, C4) in the housing (H) and a speed control means mounted on the housing (H) for controlling speed of the rotating pistons in the housing (H) is disclosed. A four-stroke engine comprising the piston assembly is also disclosed.</p> |
