Advanced science.  Applied technology.

Search

Estimation of Engine-Out NOX for Real Time Input to Exhaust Aftertreatment Controller

Abstract: 

A method and system for estimating engine-out NOx from a diesel engine. The estimation is calculated from a mathematical model that expresses engine-out NOx as functions of cylinder pressure, intake oxygen, and effective temperature, respectively. Input data for each of these functions may be obtained from fuel quantity data and from measured data, the latter including intake pressure, cylinder pressure, intake oxygen concentration, coolant temperature, and intake manifold temperature.

Patent Number: 
7,779,680
Date Of Issue: 
08/24/2010
Inventors: 

Shizuo Sasaki; Jayant V. Sarlashkar; Gary D. Neely