Patent ID: 6357226
Filing Date: 2002-03-19
Classification: B01D,F01N,Y02A,Y02T

Abstract:
A control system for use in an internal combustion engine automobile having a NOx catalyst system and a urea injection system, comprising: a first temperature sensor placed upstream of the NOx catalyst system, the first temperature sensor detecting the temperature of the exhaust gas prior to introduction into the NOx catalyst system;a NOx sensor placed upstream of the NOx catalyst system, the NOx sensor sensing the level of NOx in the exhaust gas; a temperature control assembly upstream of the first temperature sensor and NOx sensor, the temperature control assembly selectively adjusting the temperature of the exhaust gas prior to the exhaust gas being introduced into the NOx catalyst system; and a second temperature sensor placed downstream of the NOx catalyst system, the second temperature sensor detecting the temperature of the exhaust gas after exiting the NOx catalyst system, wherein the NOx sensor, the second temperature sensor, and the urea injection system are in communication to enhance the removal of NOx from the exhaust gas.