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:
Jun. 23, 2020
Filed:
Dec. 12, 2017
GM Global Technology Operations Llc, Detroit, MI (US);
Michael A. Smith, Clarkston, MI (US);
Sarah Funk, Canton, MI (US);
David E. Edwards, Rochester Hills, MI (US);
Min Sun, Troy, MI (US);
Gongshin Qi, Troy, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
An emissions control system for treating exhaust gas containing NOemissions from an internal combustion engine comprises a selective catalytic reduction (SCR) device that stores reductant that reacts with the NOemissions, a reductant supply system configured to inject the reductant according to a reductant storage model; NOmodule(s) configured to generate an NOconcentration signal indicating an NOconcentration, temperature module(s) configured to generate a temperature signal indicating an SCR temperature of the SCR device, and a control module operably connected to the reductant supply system, the NOmodule, and the temperature module. The control module is configured to determine an amount of the reductant that is parasitically oxidized based on the NOconcentration signal and the temperature signal, and to determine a correction factor based on the amount of parasitically oxidized reductant to modify the reductant storage model.