METHOD FOR REDUCING NH3 RELEASE FROM SCR CATALYSTS DURING THERMAL TRANSIENTS

A control system includes a temperature module that determines a temperature of a selective catalytic reduction (SCR) catalyst, a derivative module that determines a derivative of the temperature, and a dosing module that regulates a dosage of a reductant supplied to the SCR catalyst to regulate an...

Full description

Saved in:
Bibliographic Details
Main Authors SOLBRIG CHARLES E, PARATORE, JR. MICHAEL J
Format Patent
LanguageEnglish
Published 05.03.2009
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:A control system includes a temperature module that determines a temperature of a selective catalytic reduction (SCR) catalyst, a derivative module that determines a derivative of the temperature, and a dosing module that regulates a dosage of a reductant supplied to the SCR catalyst to regulate an engine out NOx level. A control module generates control signals based on the temperature derivative, wherein the control signals regulate an amount of reductant accumulated within the SCR catalyst to reduce reductant release from the SCR catalyst during thermal transients.
Bibliography:Application Number: US20080029644