| 摘要 |
<p>In order to ensure the correctly timed flank change in spite of ever higher pressure levels in the working chamber of a piston 1 of an internal combustion engine with a piston ring system, in which the sealing rings 5 to 7 are inserted into the annular grooves 9 to 11 with axial clearance and each have a ring gap, in at least some of the sealing rings 6, 7 on the lower ring flank with a radial width S a step 20 with a radial width si is provided so that the respective support surface for the lower groove flank is reduced with respect to the entire surface on the crankcase side of radial width S. In addition the sealing rings 5 to 7 are constructed with ring joints becoming narrower from ring to ring in the direction of the crankcase. <IMAGE></p> |
