Abstract: An apparatus and method for detecting and handling liquid separation in a liquid emulsion disposed in a tank 1 by preventing separated liquid from entering a withdrawal conduit 3 disposed in the lower portion of the tank 1 by a apparatus comprising a pump 9 driven by an electric motor 15 and taking its suction form the lower portion of the tank 1 and discharging adjacent the central portion of the tank 1, a float 5, which sinks in the emulsion and floats on the high density liquid is cooperatively associated with a relay 17 to start the pump motor 15 when accumulated high density liquid raises the float 5 a predetermined amount, a time delay 21 runs the pump 9 a predetermined length of time sufficient to reemulsify the accumulated high density and preventing it from entering the withdrawal conduit 3.

Abstract: A method and system for the control of the overall water content of an aqueous fuel in an internal combustion engine is provided. The disclosed fuel control system includes a post add water system and a control valve that is responsive to selected engine operating characteristics such as engine operating temperature, engine load, and carbon monoxide levels in the engine exhaust. The post add water system is adapted for selectively providing an additional supply of purified water via the control valve to the aqueous fuel in the fuel line. The fuel system controller is operatively associated with the control valve to regulate the quantity of water added and thereby control the overall content of water in the aqueous fuel emulsion delivered to the fuel injectors.