FIELD: mechanical engineering; internal combustion engines; dual fuel supply system. SUBSTANCE: in addition to liquid fuel supply circuit, dual fuel system has gaseous fuel main supply circuit, with gas cylinder and charging device. Multistage gas filter, special design evaporator, single step pressure regulator with adjusting screw and diaphragm made of oil and gasoline resistant rubber of definite thickness, and shutoff electromagnetic valve with control circuit. Two additional gas lines are introduced into system: transient conditions and low pressure gas line and idling system gas line. EFFECT: enlarged operating capabilities. 4 cl, 4 dwg
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