A method of using a lean NOx trap (LNT) catalyst to control vehicle engine emissions. While catalyst temperature is within a low range, the catalyst is allowed to store NOx until the catalyst is saturated. The saturated catalyst is heated to a temperature exceeding the low range. The heated catalyst is regenerated. This method can improve LNT catalyst performance at low temperatures while promoting fuel economy.

Title
(lnt) Catalyst performance
Application Number
200610008984
Publication Number
1817414
Application Date
February 9, 2006
Publication Date
August 16, 2006
Inventor
Paratore Michael J Jr
Brown David B
Agent
cheng tianzheng chen jingjun
Assignee
Gen Motors
IPC
F01N 03/00
B01D 53/94
B01D 53/56