Adaptive high pressure fuel pump system and method for predicting pumped mass

A system for predicting a mass of fuel pumped by a pump during a pumping event to a fuel accumulator (“Qpump”) to control operation of the pump, comprising:

• a pressure sensor positioned to measure pressure of fuel in the fuel accumulator;
• a temperature sensor positioned to measure temperature of fuel in the fuel accumulator;
• and
• a processor in communication with the pressure sensor to receive pressure values representing the measured pressure of the fuel in the fuel accumulator and in communication with the temperature sensor to receive temperature values representing the measured temperature of the fuel in the fuel accumulator;
• wherein the processor is configured to
• generate a model of operation of the pump by determining a converged value of an estimated start of pumping (“SOP”) position of a plunger of the pump,
• use the model to predict (“Qpump”) by inputting to the model the converged value of the estimated SOP position, a pressure value and a temperature value, and
• control operation of the pump in response to the predicted (“Qpump”).