Abstract: A fuel vapor charge producing device comprising a pure liquid fuel or mixture container which can be of any desired shape and material with a cover and a float secured inside said device to control the inflow of pure liquid fuel or mixture into the container, a fuel or mixture inlet-valve made on said container for the entry of fuel or mixture, an air inlet adapted to allow the entry of air into said container above the liquid or mixture level and another air inlet below the fuel or mixture level such that the incoming air comes in contact with the liquid fuel or mixture to aid and agitate in emulsifying and vaporizing said fuel or mixture evenly within the range of the operating temperature, and a vapor outlet connected to the intake manifold and/or to the air inlet of the carburetor of a conventional internal combustion engine, such that when the engine runs, the device is subjected to a vacuum pressure to force atmospheric air to be sucked into said device through the air inlets and to provide the proper o

Abstract: A fuel vapor producing device comprising a liquid fuel or mixture bowl-shape container; an associated cover for said container having a fuel inlet valve; and a float secured in said device, said cover integrally incorporating therewith a cylindrical air filter housing disposed vertically and concentrically on top thereof; an air agitator duct integrated in said device extending from the air filter housing to the bottom thereto to agitate the fuel or mixture therein; another air duct in said air filter housing, said air duct extending to the inside of said container having an outwardly bent portion to produce a swirling effect of the air to achieve a higher degree of mixture; a multi air jet selector disc provided on said air filter housing, said selector disc having a plurality of spaced holes of gradually increasing apertures adapted to the air duct opening on said housing, the opening of said air ducts depending on the requirement of an engine piston displacement to control the air-fuel mixture of the engin