| 摘要 |
The invention relates to propulsion engineering and particularly to internal-combustion engines. The problem solved by the present invention is improving fuel efficiency and ecological compatibility, as well as providing the ability to set advance ignition at higher rotation, increasing the rotation frequency of the working shaft and decreasing its vibration, thus making the manufacture of such engines more cost effective. This problem is solved by the operational rotor being oval-shaped when viewed in cross-section, whilst the compression rotor being square-shaped when viewed in cross-section.
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