FIELD: mechanical engineering. SUBSTANCE: secondary combustion chamber of a carburetor-mixer is made without a gas nozzle and inlet pipe line of the engine is provided with an additional gas nozzle positioned under throttle gates and coupled with a passage for supplying gas through a controlled valve. The additional gas nozzle is made of a pipe provided with side holes positioned in the zone of branching of passages of intake pipe line. The valve for controlling the additional nozzle is connected to a diaphragm of the pneumatic chamber whose vacuum space is in communication with a space downstream of the throttle. EFFECT: enhanced reliability. 3 cl, 1 dwg
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