Method and a system for determining a flow resistance across a particulate filter

US10724418B2 · kind B2 · utility

Assignee

• Scania CV AB · SE

Inventors

• Niklas Vila Karpe · Täby, SE
• Krister Pettersson · Katrineholm, SE
• Robert Svensson · Loftahammar, SE

Key dates

• Filing date: Jan 18, 2016
• Grant date: Jul 28, 2020
• Expiry date: May 27, 2036

Classification

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

Abstract

A method of determining a flow resistance across a particulate filter located downstream of an internal combustion engine in an exhaust system. The method comprises measuring a first differential pressure across the particulate filter, measuring a second differential pressure downstream of the particulate filter, determining a pressure ratio of the first differential pressure and the second differential pressure, and from said pressure ratio, determining a flow resistance across the particulate filter. The second differential pressure is measured across a selective catalytic reduction system.