Method and device for diagnosis of a particle filter arranged in the exhuast gas system of a petro-operated internal combustion engine

US11136911B2 · kind B2 · utility

Assignee

• VITESCO TECHNOLOGIES GMBH · DE

Inventors

• Michael Nienhoff · Regensburg, DE
• Hao Chen · Walnut Creek, US
• Paul Rodatz · Landshut, DE

Key dates

• Filing date: Dec 17, 2019
• Grant date: Oct 5, 2021
• Expiry date: Dec 19, 2039

Classification

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

Abstract

Determining the presence of a particle filter in the exhaust gas tract of an engine, with the steps of determining a first exhaust gas temperature curve which occurs in the exhaust gas tract upstream of the particle filter; measuring a second exhaust gas temperature curve by a first temperature sensor arranged downstream of the particle filter; determining a first heat quantity by integration over a specific time of a first heat flow curve determined by a first exhaust gas mass flow, a first specific heat capacity and the first exhaust gas temperature curve; determining a second heat quantity by integration over the specific time of a second heat flow curve determined by a second exhaust gas mass flow, a second specific heat capacity and the second exhaust gas temperature curve, evaluating the first heat quantity and the second heat quantity to determine the presence of the correct particle filter.