FIELD: engine engineering. SUBSTANCE: head of cylinders has housing 1, gas exchange passageways 13 with sockets 15 of valves, step opening made in boss 2 of housing 2 of the head for receiving sleeve 4 of nozzle 10 and its sprayer. Bearing washer 5 is interposed between the surface of sleeve 4 and bearing surface 3 of boss 2. Bearing surface 3 of boss 2 is conical around the opening under the sprayer of the nozzle at the diameter which is equal to the diameter of the tip of the nozzle. The diameter of washer 5 is equal to the diameter of nozzle sleeve. The height of the washer and angle of inclination of the cone generatrix and bearing surface of the boss are determined by relationships presented in the invention description. EFFECT: improved design. 4 dwg
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