The present invention relates to a fuel-saving air inlet device that can improve the engine output of a car and reduce the consumption of smoke and fuel. The present invention is designed to speed up the flow of air from the air filter to the engine block and to cause vortex flow. The present invention relates to a fuel-saving air inlet device for automobiles that can increase combustion efficiency by pulverizing fuel introduced into a room into ultra-fine particles.;The present invention has a fixed plate coupled between the air intake manifold and the engine block, a rotating body that is rotatably fitted to the fixed plate and rotates when the air is introduced, and a spiral formed at the inner edge of the rotating body. Composed of the rotary blades of the air flowing into the combustion chamber causing the vortex phenomenon is characterized in that the flow rate is made faster.;The present invention as described above is to crush the fuel introduced into the combustion chamber in the form of ultra-fine particles to form an optimum mixing ratio to increase the combustion efficiency to reduce fuel and smoke so as to improve the engine output.
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