FIELD: gas industry; automobiles, diesel locomotives, sea and river vessels. SUBSTANCE: engine has precombustion chamber installed in cylinder cover at angle to its axis and spark plug installed along working cylinder axis with standard electrode gap. Precombustion chamber is arranged at angle of 42-45 degrees. Placed inside precombustion chamber is additional spark plug with electrode gap of 0.28-0.34 mm. Electrode gap of main spark plug is 0.15-0.25 mm. EFFECT: efficiency increased to 39-40%; possibility of operation on any gaseous fuels such as biogas, mine gas. 1 dwg
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