Patent ID: 7249596
Filing Date: 2007-07-31
Classification: F02D,F02M,Y02T

Abstract:
1. A method for controlling a fuel system and delivering fuel to an internal combustion engine, the fuel system including at least one fuel injector having at least one capillary flow passage, a heat source arranged along the at least one capillary flow passage, the heat source capable of heating the liquid fuel in the at least one capillary flow passage to a level sufficient to convert at least a portion thereof from the liquid state to a vapor state, the method comprising the steps of: (a) determining engine air flow; (b) measuring a value indicative of degree of engine warm-up; (c) determining a portion of liquid fuel to be converted to the vapor state by the at least one capillary flow passage, said determining step employing the values measured in steps (a)-(b); (d) controlling power supplied to the heat source of the at least one fuel injector to achieve a predetermined target temperature, the predetermined target temperature operable to convert the portion of liquid fuel to the vapor state determined in step (c), said step of controlling power employing a binary power source; and (e) delivering the fuel to a combustion chamber of the internal combustion engine;