| 摘要 |
The invention relates to an oil control ring ( 10 ) for pistons of internal combustion engines. The aim of the invention is to provide an improved shape-adaptation capacity in comparison to prior art, with a tangential force that enables the ring to guarantee low friction and also low oil consumption during the operation of the engine. To achieve this, the inventive oil control ring comprises a solid bearing surface ( 13 ) that lies against the cylinder wall, in addition to parallel ring flanks ( 11 a, 11 c), between which a radial recess ( 12 a) that runs around the periphery is configured in the rear ( 12 ) of the ring, said recess being designed to receive a coil spring (M). The peripheral region of the ring flanks is provided with undulating end faces ( 12 b, 12 c) that face towards the rear of the ring. Said undulating end faces ( 12 b, 12 c) of the upper and lower ring flanks ( 11 a, 11 c) are offset out of phase with one another.
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