FIELD: engines and pumps.
SUBSTANCE: in the engine the first pair of cylinders is interconnected through inlet controlled valves with air inlet path and through discharge automatic valves with bypass channel, and the second pair of cylinders is interconnected through inlet controlled valves with bypass channel and through outlet controlled valves with exhaust main line. In the near-valve area of bypass channel at each expansion cylinder there installed is injector and ignition plug, and injector is installed in the head of each expansion cylinder. According to the invention, the first pair of cylinders is also equipped with the channel connecting both cylinders and with controlled bypass valves installed at the joint of channel with each cylinder. Drive opens each of the controlled valves when pistons of the first group of cylinders are located at the following points: one at upper dead point, and the other one at lower dead point.
EFFECT: higher engine efficiency.
4 cl, 3 dwg
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