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. 30, 2016
Filed:
Mar. 06, 2013
Delphi International Operations Luxembourg S.a.r.l., Bascharage, LU;
Julien Schmitt, Kuntzig, FR;
Eric L. P. Michel, Guelff, BE;
Delphi International Operations Luxembourg S A.R.L., Luxembourg, LU;
Abstract
A process for desulfation of a NOx adsorber in a diesel internal combustion engine exhaust system is disclosed, which comprises: determining an amount of post fuel (Q) required to reach a relatively rich target exhaust air fuel ratio (AFR) on the basis of a measured air flow; determining a heating-contributing fuel value (ηQ) required to reach or maintain a target desulfation temperature in said NOx adsorber by way of an exothermal reaction; calculating a target air flow (Air) corresponding to the air flow required for a substantially stoichiometric combustion of a torque-contributing main fuel quantity (Q) together with said heating-contributing fuel value (ηQ); and causing the engine to inject said post fuel amount (Q) and said main fuel quantity (Q) while controlling the air flow to meet said target air flow (Air).