GASEOUS FUEL SYSTEMS AND CONTROLS

A gaseous fueling system includes a fuel rail in fluid communication with an injector and a combustion chamber in fluid communication with the injector. An electronic controller opiates the injector perform an injection of gaseous fuel to the combustion chamber, obtaining a pressure measurement indicating a pressure of gaseous fuel in the rail during the operating, determines a upper value of the pressure measurement and a lower value of the pressure measurement, calculates a difference between the upper value of the pressure measurement and the lower value of the pressure measurement, calculates an injected fuel quantity estimate using the difference, and operates the gaseous fueling system using the injected fuel quantity estimate.