Patent ID: 8036811
Filing Date: 2011-10-11
Classification: F02D,Y02T

Abstract:
1. A method for evaluating the quantity of a fuel with of an electrically controlled fuel injector that is actually injected into a corresponding cylinder of an internal combustion engine, that includes a crankshaft with associated an detector adapted to provide a signal representative of a speed of the crankshaft, the method comprising the steps of: acquiring a signal while the electrically controlled fuel injector is energized for a predetermined period in which substantially all other fuel injectors are de-energized; processing the signal so as to data representative of an amplitude of a harmonic component of the signal; calculating a power value of the harmonic component; and assuming the power value of the harmonic component as an estimation of the quantity of the fuel actually injected by the electrically controlled fuel injector in the predetermined period.