Selective catalytic reduction (SCR) catalyst depletion control systems and methods

US8429898B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Rebecca J. Darr · Milford, US
• James M. Perrin · Livonia, US
• Paul Jasinkiewicz · Northville, US
• Jason Daniel Mullins · Brighton, US
• Kyle E. Crawford · Howell, US

Key dates

• Filing date: Jun 18, 2010
• Grant date: Apr 30, 2013
• Expiry date: Jun 22, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A dosing control system for a vehicle includes an adaption triggering module, a dosing management module, and an adaption ending module. The adaptation triggering module triggers performance of an adaptation event when a first amount of nitrogen oxides (NOx) measured by a first NOx sensor located downstream of a selective catalytic reduction (SCR) catalyst is greater than a predicted value of the first amount of NOx. The dosing management module disables dosing agent injection during the adaptation event. The adaptation ending module selectively delays ending the adaptation event after a predetermined number of phases of the adaption event have been completed based on a comparison of the first amount of NOx with a second amount of NOx measured by a second NOx sensor located upstream of the SCR catalyst.