FIELD: engines and pumps.
SUBSTANCE: this combustion chamber has wall and vent channel rigidly jointed therewith. Said vent channel makes the spark plug seat exposed to said combustion chamber. Spark plug guide is arranged in said vent channel to displace across channel axis and incorporates plug guide cylindrical section and control collar fitted in the thrust sliding over vent channel stop surface. Spark plug guide incorporates cooling chamber with air feed holes for chamber cooling. Cooling chamber is configured to allow cooling by affecting the spark plug wall arranged at plug guide. Note here that said cooling chamber is arranged between cylindrical wall guide section and combustion chamber and has cylindrical wall cooling section made between cylindrical wall guide section and sealing collar.
EFFECT: optimum cooling irrespective of aircraft flight phase and difference in thermal conditions between combustion chamber and crankcase.
4 cl, 3 dwg
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