Patent ID: 6557530
Filing Date: 2003-05-06
Classification: F02D,Y02T

Abstract:
A fuel control system for an internal combustion engine, the system comprising:a fuel collection unit configured to store pressurized fuel therein; a fuel injector configured to inject a quantity of fuel from said fuel collection unit into a combustion cylinder of an internal combustion engine; means for determining a first energy level associated with said fuel collection unit prior to injection of said quantity of fuel and a second energy level associated with said fuel collection unit after injection of said quantity of fuel; means for determining an injection pressure corresponding to a pressure of said quantity of fuel injected by said fuel injector; a temperature sensor producing a temperature signal corresponding to a temperature of one of said engine and said pressurized fuel; and a control circuit determining a first amount of fuel supplied by said fuel collection unit to said fuel injector as a function of said first and second energy levels, and determining a second amount of fuel corresponding to a portion of said first amount of fuel directed by said fuel injector back to a fuel supply as a function of said injection pressure and said temperature signal, said control circuit determining an estimate of said quantity of fuel as a difference between said first and second amounts of fuel.