| 摘要 |
The invention relates to a valve system in a radial-piston engine having relatively rotating sliding rings arranged to be yieldingly pressed against one another and formed with duct apertures, viz. one port ring and one valve ring. In accordance with the invention the face of the valve ring that is turned towards the port ring is formed with grooves encircling the apertures formed in the valve ring, said grooves, during part of the relative movement of the rings, coinciding locally with circumferentially extending grooves formed in the port ring. |
