Method for model-based determination of a temperature distribution of an exhaust gas post-treatment unit

US9779218B2 · kind B2 · utility

Assignee

• MTU FRIEDRICHSHAFEN GMBH · DE

Inventors

• Marc Hehle · Konstanz, DE
• Ralf Müller · Geringswalde, DE
• Jens Niemeyer · Friedrichshafen, DE
• Jörg Remele · Hagnau, DE
• Guido Schäffner · Ravensburg, DE
• Holger Sinzenich · Markdorf, DE
• Tim Späder · Tettnang, DE

Key dates

• Filing date: Feb 7, 2012
• Grant date: Oct 3, 2017
• Expiry date: Dec 2, 2034

Classification

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

Abstract

In a method for a model-based determination of a temperature distribution of an exhaust gas post-treatment unit, a differentiation is made between steady operating states and non-steady operating states by taking into account the axial and the radial temperature distribution, and, on the basis of virtual segmentation of the post-treatment unit, in particular the radial heat transfer to the surroundings is taken into account in the model-based determination for steady operating states, and for non-steady operating states the heat transfer from the exhaust gas which flows axially through the post-treatment unit to the segments is taken into account by a heat transfer coefficient k.