The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2010
Filed:
May. 12, 2008
Shizuo Sasaki, San Antonio, TX (US);
Jayant V. Sarlashkar, San Antonio, TX (US);
Gary D. Neely, San Antonio, TX (US);
Shizuo Sasaki, San Antonio, TX (US);
Jayant V. Sarlashkar, San Antonio, TX (US);
Gary D. Neely, San Antonio, TX (US);
Southwest Research Institute, San Antonio, TX (US);
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.