Method for operating a particulate filter in an exhaust aftertreatment system of a combustion engine

US11346268B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Alexandre Wagner · Stuttgart, DE
• Benedikt Alt · Heimsheim, DE
• Fabian Straub · Heßdorf, DE
• Thomas Baumann · Wettingen, CH
• Christoph Schweizer · Laufen, CH
• Michael Drung · Rochlitz, DE
• Oliver Krannich · Tamm, DE
• Rainer Maier · Tamm, DE
• Tobias Zolg · Bermatingen, DE

Key dates

• Filing date: May 11, 2020
• Grant date: May 31, 2022
• Expiry date: Sep 11, 2040

Classification

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

Abstract

A method for the operation of a particulate filter in an exhaust aftertreatment system of a combustion engine (200) with the following steps: set up (111, 116) a pressure difference model, which models a measured pressure difference (Δp) which drops across the particulate filter (210) as a function (220) of a volume flow ({dot over (V)}) through the particulate filter (210) with an offset value (a0, C); measure (120) multiple measurement values (245) for the pressure difference (Δp) at different volume flows ({dot over (V)}) and solve (130) the pressure difference model as a function of the pressure difference (Δp), whereby the offset value (a0, C) is also determined.