| Patent Number |
Title Of Patent |
Date Issued |
| 8141349 |
Exhaust emission control device and method for internal combustion engine, and engine control un |
March 27, 2012 |
| An exhaust emission control device for an internal combustion engine, which is capable of supplying a just enough amount of reducing agent to the NOx catalyst even when a catalyst is provided on an upstream side of the NOx catalyst. A catalyst and a NOx catalyst are disposed at respe |
| 8117829 |
Exhaust emission control device and method for internal combustion engine, and engine control un |
February 21, 2012 |
| An exhaust emission control device for an internal combustion engine which is capable of supplying a just enough amount of reducing agent to a NOx catalyst while causing the consumption amount of reducing agent dependent on the degradation degree of an upstream catalyst to be reflect |
| 7997067 |
Exhaust emission control device and method for internal combustion engine, and engine control un |
August 16, 2011 |
| An exhaust emission control device for an internal combustion engine, which is capable of accurately estimating the amount of NOx trapped by a NOx catalyst even when a catalyst is provided on an upstream side of the NOx catalyst. A catalyst having the function of purifying NOx and a NOx |
| 7618605 |
Exhaust emission control device and method for internal combustion engine, and engine control un |
November 17, 2009 |
| An exhaust emission control device for an internal combustion engine, which is capable of supplying a just enough amount of reducing agent to a NOx catalyst, thereby reducing exhaust emission and improving fuel economy. The device includes a three-way catalyst, a NOx catalyst provide |
| 7591986 |
Exhaust emission control device and method for internal combustion engine, and engine control un |
September 22, 2009 |
| An exhaust emission control device which is capable of supplying a just enough amount of reducing agent to a NOx catalyst while causing the amount of reducing agent consumed in an upstream catalyst to be reflected thereon. A NOx catalyst for trapping NOx and reducing NOx to change the |
