FIELD: mechanical engineering; diesel operating on gaseous fuels. SUBSTANCE: proposed fuel system has high-pressure fuel injection pump, high-pressure line, closed-type nozzle with under-needle space and spray tip. Liquid diesel fuel tank, gas storage and supply bottles, diesel fuel low-pressure line, gaseous fuel supply line, supply pipe line, compressor for compression of gas and hydraulic control unit. Compressor is connected between gas storage and gas supply bottles. Supply pipes line is connected between gas supply bottle and hydraulic control unit. Gas supply line connects hydraulic control unit with nozzle under-needle space. High-pressure line connects high-pressure fuel pump with nozzle spray tip. Hydraulic control unit is made in form of groove on plunger forming control edge and gas supply cutoff edge, edges forming channel for passage of gas between supply pipeline and gas supply line. Nozzle is provided with control space and its needle is provided with groove, hole and injection channel arranged successively in line connecting high- pressure line with nozzle spray tip. EFFECT: improved performance of system owing to self-contained control of gas supply and diesel fuel supply nozzles. 2 dwg
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