Exhaust purification device and method of calculating NOx mass reduced from lean NOx trap during regeneration

US9835067B2 · kind B2 · utility

Assignees

• HYUNDAI MOTOR COMPANY · KR
• FEV Group GmbH · DE

Inventors

• Jin Ha Lee · Seoul, KR
• Jin-Woo Park · Suwon-si, KR
• Sera Lim · Hwaseong-si, KR
• Joschka Schaub · Aachen, DE
• Thomas Wittka · Hachenburg, DE
• Alexander Vovk · Aachen, DE

Key dates

• Filing date: Dec 1, 2015
• Grant date: Dec 5, 2017
• Expiry date: Feb 14, 2036

Classification

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

Abstract

A method of calculating a nitrogen oxide (NOx) mass reduced from a lean NOx trap (LNT) during regeneration includes calculating a C3H6 mass flow used to reduce the NOx among a C3H6 mass flow flowing into the LNT of an exhaust purification device, calculating a NH3 mass flow used to reduce the NOx among a NH3 mass flow generated in the LNT, calculating a reduced NOx mass flow based on the C3H6 mass flow used to reduce the NOx and the NH3 mass flow used to reduce the NOx, and calculating the reduced NOx mass by integrating the reduced NOx mass flow over a regeneration period.