Dual fuel engine fuel system relates to systems for supplying fuel to an internal combustion engine. The object of the utility model is to provide a power supply system equipped with a gas cylinder with a multivalve, the possibility of draining gas from the cylinder, and the possibility of connecting an external pressure source for pressure testing system without podrazborki its nodes, ensuring compliance 03112194-1094-03 RD. Said technical result is achieved in that the power supply system comprising an equivalent petrol and gas supply system as well as the fuel type switching device, wherein the gas supply system includes a gas cylinder with a multivalve and threading device expenditure gas line, the gas supply system of the engine in expenditure highway near multivalve installed tee, which is connected to the drain valve, equipped with a device for attaching the drain hose. Speed valve multivalve is not installed in the housing, and the flow from tee line.; 2 yl.
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