Patent ID: 6305167
Filing Date: 2001-10-23
Classification: F02B,F02D,G01F,Y02T

Abstract:
A method of controlling an internal combustion engine, the engine including a variable geometry turbocharger (VGT) driven in response to a VGT command signal, the engine further including a variable flow exhaust gas recirculation (EGR) system driven in response to an EGR command signal to recirculate exhaust to an engine intake mixture, the method comprising:determining the EGR command signal based on at least one engine condition;determining a desired oxygen quantity of the intake mixture;estimating an actual oxygen quantity of the intake mixture;determining an engine torque demand;determining an engine speed;determining a feedforward term based on the torque demand and the engine speed; anddetermining the VGT command signal based on the desired oxygen quantity, the estimated actual oxygen quantity, the EGR command signal, and the feedforward term.