| 摘要 |
The invention relates to the propulsion engineering, namely to internal combustion engines and compressors.The piston (1) is provided with collars (5, 6), fixed with rivets (4) in the upper and lower parts of a groove (3), made in the head of the piston (1). The collars (5, 6) are made of heat-resistant, antifriction material and are tightly fit into the split joints and on the diameter of the cylinder. In the groove (3), between the collars (5, 6), is set a U-shaped compression ring (7), and in the groove of the U-shaped ring (7) is set another compression ring (8).
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