Patent ID: 6378515
Filing Date: 2002-04-30
Classification: F02D,F02M,Y02T

Abstract:
An exhaust gas recirculation apparatus adapted for use on an internal combustion diesel engine, comprising:an engine operational model, with said engine operational model capable of outputting at least one engine operational characteristic; a feedback controller portion, said feedback controller portion receiving an emissions level feedback and generating a feedback control signal based on a difference between a predetermined EGR level and said emissions level feedback; a feedforward controller portion receiving a plurality of engine sensor inputs and using said plurality of engine sensor inputs in conjunction with said engine operational model to generate a feedforward control signal, said feedforward control signal capable of changing an EGR exhaust gas flow before said plurality of engine sensor inputs show a deviation from a predetermined emissions level; and a controller receiving said feedback control signal, said feedforward control signal, and accessing said engine operational model, said controller regulating an EGR exhaust gas flow in response to said feedback control signal, said feedforward control signal, and said engine operational model.