Non-intrusive fueling event measurement for fueling systems

A method of controlling an engine fueling system including a fuel rail in fluid communication with a plurality of fuel injectors, each of the plurality of fuel injectors configured to provide fuel to a respective one of a plurality of combustion cylinders, and a high-pressure fuel pump in fluid communication with the fuel rail, the method comprising:

• receiving pressure sensor output indicative of a fuel pressure of the fuel rail for a plurality of engine cycles,
• processing the pressure sensor output to determine a fueling value indicative of a fuel quantity of an injection event of one of the plurality of fuel injectors, and
• in response to the fueling value, at least one of:
• adjusting an injector control parameter to mitigate a difference between a commanded fueling quantity and an actual fueling quantity, displaying an operator perceptible output indicative of a condition of the system, and diagnosing a condition of the system.

A system comprising:

• an engine comprising a plurality of combustion cylinders;
• a fueling system comprising a fuel rail in fluid communication with a plurality of fuel injectors, each of the plurality of fuel injectors being configured to provide fuel to a respective one of the plurality of combustion cylinders, and a high-pressure fuel pump in fluid communication with the fuel rail;
• and
• an electronic control system in operative communication with the fueling system and configured to:
• receive pressure sensor output indicative of a fuel pressure of the fuel rail for a plurality of engine cycles,
• process the pressure sensor output to determine a fueling value indicative of a fuel quantity of a pumping event of a piston of the high-pressure fuel pump, and
• in response to the fueling value, at least one of:
• adjust a pump control parameter to mitigate a difference between a commanded pumping quantity and an actual pumping quantity, display an operator perceptible output indicative of a condition of the system, and diagnose a condition of the system.