Compact exhaust gas treatment system and method of operating the same

US9903244B2 · kind B2 · utility

Assignee

• Caterpillar Motoren GmbH & Co. KG · DE

Inventors

• Jan Dreves · Kiel, DE
• Carsten Rickert · Kiel, DE
• Thomas Obenaus · Graz, AT

Key dates

• Filing date: Jun 25, 2013
• Grant date: Feb 27, 2018
• Expiry date: Apr 25, 2034

Classification

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

Abstract

Directing exhaust gas around a catalyst may pre-heat the catalyst and may thereby bring the catalyst quickly in its operating temperature range. An exhaust gas treatment system for treating the exhaust gas may include a first flow path, a second flow path, and a control system. The first flow path may include a catalyst. The second flow path may be coaxially arranged in heat exchange relation with respect to the first flow path. The control system may be configured to control the flow of exhaust gas through the first flow path or the second flow path dependent upon the catalyst temperature.