FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: device has carburetor or system to inject fuel into intake branch, liquid fuel evaporator accommodating multiple-layer hygroscopic element, and diffuser-mixer. Fuel-air mixture is divided in evaporator into two flows, one of which is lean air mixture with light fuel fractions, and the other, enriched air mixture with heavy fractions of fuel and nonevaporated fuel drops. Diffuser-mixer provides controlled mixing of flows to prepare fuel-air mixture of optimum composition. EFFECT: enhanced quality of prepared fuel-air mixture in gasoline internal combustion engines. 8 cl, 1 dwg
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