Selective catalytic reduction fault detection

US10465589B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Alessandra Neri · Torino, IT
• Alessia Tuninetti · Piemonte, IT
• Maria Camuglia · Trecastagni, IT
• Giulio Binetti · San Nicolò a Trebbia, IT
• Giuseppe Mazzara Bologna · Barrafranca, IT
• Alberto Bemporad · Lucca, IT
• Daniele Bernardini · Sterling Heights, US

Key dates

• Filing date: Mar 19, 2018
• Grant date: Nov 5, 2019
• Expiry date: May 10, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Technical solutions are described for selective catalytic reduction diagnosis in an emissions control system or an exhaust system used for treating exhaust gas, such as in a motor vehicle including an internal combustion engine. An example emissions control system includes a selective catalytic reduction (SCR) device. The emissions control system further includes a controller that is performs SCR fault diagnosis. The SCR fault diagnosis includes computing a plurality of estimated NH3 storage capacity values (Θ) of an SCR catalyst of the SCR device. The diagnosis further includes determining a diagnostic parameter of the SCR device using the plurality of estimated NH3 storage capacity values.