FIELD: engine building.
SUBSTANCE: engine comprises working cylinder 1 with working piston 2, combustion chamber 5, prechamber 6, annular channel 22 located around combustion chamber 5, compressor cylinder 13, with one or more fuel feed devices 12, 26, and with compressor piston 19 kinematically connected to working piston 2. Spark plugs 7 are installed with possibility to adjust depth of electrodes, in through cavities of cylindrical shape 35 made in head of working cylinder 1. Spark plugs 7 are arranged evenly along the circumference of annular channel 22 so that the axis of each of these cavities 35 passes through the middle of the distance between two adjacent radial channels 10, wherein in each cavity 35 there is ignition plug 7 so that from the outer part of annular channel 22 to the end of spark plug 7 there is a free volume of the cavity selected in range of 0.1 to 3 cm3. On the edges of cylindrical cavities 35, on the side of annular channel 10, bevels 36 can be made.
EFFECT: arrangement of electrodes of the plug in cavities will increase the ignition speed, which promotes more complete combustion of fuel assemblies, higher stability of engine operation and its efficiency, reduces fuel consumption and toxicity of exhaust gases.
1 cl, 3 dwg
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