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:
Dec. 04, 2018
Filed:
Apr. 25, 2017
GM Global Technology Operations Llc, Detroit, MI (US);
Carlos Ildefonso Hoyos Velasco, Turin, IT;
Vincenzo Alfieri, Turin, IT;
Maria Camuglia, Francavilla di Sicilia, IT;
Giuseppe Conte, Turin, IT;
Giuseppe Mazzara Bologna, Turin, IT;
Carmen Pedicini, Turin, IT;
David Tulli, Turin, IT;
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
An automotive vehicle includes an internal combustion engine and an exhaust system. The exhaust treatment system includes a dosing system that injects NHinto an exhaust gas stream generated by the engine. An SCR device stores an amount of the NHand converts NOx into diatomic nitrogen (N) and water (HO) based on the stored amount of the NH. The vehicle further includes an SCR status estimator device and a controller. The SCR status estimator device determines an NHcoverage ratio (R), which indicates a stored amount of NHwith respect to a maximum NHstorage capacity of the SCR device. The controller determines a target NOx reduction efficiency (η) of the SCR device, and an NHcoverage ratio set point (R) based on the η. The controller also generates an NHcontrol signal (u) that controls the dosing system based on a comparison between the R and the R.