Fuel efficient, low pollution carburetor

A carburetor system for an internal combustion engine comprising:

• source means for supplying liquid hydrocarbon fuel;
• variable fuel flow means associated with the source of fuel;
• fuel atomizing, vaporizing and air mixing means selectively receiving fuel from the source means across the variable fuel flow means and having a flow path along which said fuel is displaced, the fuel atomizing, vaporizing and air mixing means comprising a plurality of spaced turbulent vortical flow sites disposed along the flow path and means for introducing a quantity of air at each site;
• primary air means through which primary air passes and into which fuel and air from the fuel atomizing, vaporizing and air mixing means are discharged;
• means interposed between the engine and the fuel atomizing, vaporizing and air mixing means by which fumes are recycled, comingled with air and introduced into the flow path at at least one of said sites;
• means downstream of the primary air means receiving the effluent from the primary air means and comprising means separating the unvaporized fuel from said effluent and returning the same to said flow path for recycling and means delivering the remainder of the fuel/air mixture to the intake manifold of the engine;
• throttle means associated with the primary air means;
• means responsive to the vacuum of the engine;
• fuel metering means comprising control means (a) automatically maintaining the variable fuel flow means at a given setting during steady state conditions and (b) automatically adjusting the setting of the variable fuel flow means in response to variations in the throttle means and the vacuum responsive means during start-up, accelaration and deceleration.