Patent ID: 8676476
Filing Date: 2014-03-18
Classification: F02D

Abstract:
1. A method for learning performance characteristics of fuel injectors in an engine, said method comprising: identifying an initial calibration curve relating fuel injection quantity to pulse width time for the fuel injectors in the engine; defining a learned performance curve for each fuel injector in the engine as initially being equal to the initial calibration curve; determining a desired amount of fuel; calculating a pulse width time for each fuel injector based on the learned performance curve and the desired amount of fuel; using the pulse width time as calculated for each fuel injector during engine operation; measuring engine operational data; calculating an actual amount of fuel delivered by each injector based on the engine operational data; comparing the actual amount of fuel delivered by each injector based on the engine operational data to the desired amount of fuel corresponding to the pulse width time as calculated; and updating the learned performance curve for each fuel injector in the engine, based on the comparison of the actual amount of fuel delivered to the desired amount of fuel, using a Markov Decision Process.