Patent ID: 6871632

Claim:
A method regulating the fuel injection of an internal combustion engine, to which combustion air is fed through an intake tract having first and second air flow control elements spaced apart with respect to each other along the length of the tract to provide for control of the air flow into the engine, said method comprising the steps of: a) obtaining signals representative of the actual values of the position settings of the first and second air flow control elements and of engine rotational speed; b) utilizing the signals representative of the actual values of the position settings of the first and second air flow control elements and of engine rotational speed as input variables to calculate model values for air induction pressure an air mass flow in the intake tract; c) obtaining signals representative of the actual values of air induction pressure and air mass flow in the intake tract; d) utilizing the model values calculated for air induction pressure and air mass flow and the actual values of air induction pressure and air mass flow to calculate alignment values compensating for deviations between the model air mass flow and the actual air mass flow; e) supplying signals representative of values of a desired pressure and a desired mass air flow wanted in the intake tract; and f) utilizing the alignment values and desired values to calculate operating position setting values for the first and second control elements.