FIELD: mechanical engineering; automobile engines. SUBSTANCE: gas pressure regulator in dual-fuel system including gas pipe and petrol pipe has different diameter diaphragms rigidly connected in center and spring-loaded towards blind chamber formed in between and separating regulator space communicating through gas pipeline with electromagnetic metering valve from regulator space communicating with engine intake manifold. The latter is connected with gas supply device through gas mixing spacer connected to electromagnetic metering valve and made in form of rigidly interconnected pack of three plates and box-shaped housing. Housing has inlet union connected to electromagnetic metering valve and gas space communicating with inlet hole made in plate adjoining the housing. Extreme plates in pack are provided with two coaxial ports, and middle plate is provided with hole forming closed slot in pack. Ports of extreme plates and inlet hole in plate adjoining the housing are arranged in pack within the limits of hole in middle plate. EFFECT: increased economy and enhanced reliability of operation. 3 cl, 8 dwg
