Abstract: A simple, inexpensive apparatus for introducing a mixture of vaporized fuel, air and combustion supporting particles to an internal combustion engine to improve combustion efficiency and to reduce emissions of incompletely combusted hydrocarbon fuels is provided. The apparatus includes a single chamber for containing a volume of liquid fuel and a volume of vaporized fuel, a supply of combustion supporting particles disposed within the chamber, a conduit for supplying liquid fuel to the chamber, a conduit for supplying air to the chamber, a liquid level controller for maintaining the volume of liquid fuel in the chamber within predetermined limits, and an outlet from the chamber for conveying a mixture of vaporized fuel, air and combustion supporting particles to a vacuum inlet of an internal combustion engine. The disclosed apparatus is utilized in a combination including an internal combustion engine and a fuel system therefor, to improve the fuel economy of motor driven vehicles.

Abstract: An apparatus for preparing and supplying a mixture of fuel, air and combustion supporting particles to an internal combustion engine for use therein. A first chamber open to the atmosphere is used to contain a controlled amount of liquid fuel, a portion of which is vaporized by an ultrasonic transducer to produce a mixture of vaporized fuel and air. A second chamber open to the atmosphere, and in fluid communication, is used to contain a supply of combustion supporting particles mixed with liquid fuel. Air enters the second chamber and pours through the mixture of fuel and carburetor supporting particles to produce a vaporized mixture of fuel, air and combustion supporting particles. The output of the first and second chambers are mixed together and supplied on demand to the mixed fuel and air mixture flowing from the carburetor into the engine to enhance the performance of the engine.