Patent ID: 6453661
Filing Date: 2002-09-24
Classification: F01N,F02D,F02M,F02P,Y02A,Y02T

Abstract:
A method for controlling an engine coupled to an emission control device, the method comprising:determining an amount of oxidants stored in the emission control device; calculating a set-point amount of oxidants stored in the emission control device; adjusting a fuel injection amount into the engine so that said amount of oxidants stored in the emission control device approaches said set-point amount of oxidants stored in the emission control device based on an error between said amount of stored oxidants and said set-point, said oxidant set-point is a variable value that is determined during operation of the engine and said oxidant set-point is determined based on at least one engine operating parameter, said oxidant set-point is further determined based on an amount of oxidant storage capacity in a defined portion of the catalyst, wherein the catalyst includes multiple bricks; and said defined portion of the catalyst comprises a certain number of bricks.