Method and device for determining the load condition of particle filters

US5511413A · kind A · utility

Assignee

• J. Eberspaecher GmbH & Co. KG · DE

Inventors

• Wolfgang Pfister · Eßlingen, DE
• Walter Blaschke · Eßlingen, DE
• Erwin Burner · Adelberg, DE
• Heinrich Wacker · Weilheim, DE
• Peter Steiner · Edison, US

Key dates

• Filing date: Sep 8, 1993
• Grant date: Apr 30, 1996
• Expiry date: Sep 8, 2013

Classification

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

Abstract

A method and a device for determining the load condition of a particle filter (10) used in the exhaust gas system (11) of a diesel engine (12) employed in particular in a motor vehicle, wherein PA1 a pressure value (.DELTA.P.sub.filter, P.sub.abs.pre-filter or P.sub.rel.pre-filter) and a temperature value (t.sub.m,filter of the exhaust gas volume flow in the particle filter (12) are measured; PA1 the engine speed (n) proportional to the volume flow is measured; PA1 an actual characterizing value is calculated considering these measurement values; and PA1 a comparison between actual characteristic value (IK) and limit characteristic value (GK) is performed for initiating a regeneration process when the difference (DI) is sufficiently small.