FIELD: internal combustion engines. SUBSTANCE: neck of throttle device (Venturi tube) is additionally provided with swirler with passages supplying the air from the atmosphere located at the blade passage inlet. Applied on the inner surface of throttle device and surface of the swirler is catalyst. Damper mounted on suction branch pipe is connected in synchronism with throttle valve of the engine. EFFECT: enhanced efficiency. 3 cl, 1 dwg
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