Patent ID: 6705301
Filing Date: 2004-03-16
Classification: F02D,Y02T

Abstract:
A system for generating a charge flow command and an EGR fraction command for an air handling system of an internal combustion engine, the system comprising:means for determining engine rotational speed; a memory unit having a number of charge flow data sets and corresponding EGR fraction data sets stored therein, each of said number of charge flow data sets producing a different charge flow command value and each of said number of EGR fraction data sets producing a different EGR fraction command value as a function of said engine rotational speed and an engine fueling command; means for determining ambient air density; means for determining engine operating temperature; data subset selection logic selecting a subset of said number of charge flow and corresponding EGR fraction data sets as a function of an emission level cap value and of either of said ambient air density and said engine operating temperature; charge flow determination logic producing the charge flow command from said subset of said number of charge flow data sets as a function of said engine rotational speed and said engine fueling command; and EGR fraction determination logic producing the EGR fraction command from said subset of said number of EGR fraction data sets as a function of said engine rotational speed and said engine fueling command.