Process and apparatus for the regeneration of a soot-particle filter in an internal-combustion engine

US5042248A · kind A · utility

Assignee

• Daimler-Benz AG · DE

Inventors

• Jorg Abthoff · Plüderhausen, DE
• Hans-Dieter Schuster · Schorndorf, DE
• Hans-Joachim Langer · Waiblingen, DE
• Erwin Strohmer · Winnenden, DE
• Rolf Gabler · Waiblingen, DE
• Roland Schulte · Bad Marienberg, DE

Key dates

• Filing date: Apr 12, 1990
• Grant date: Aug 27, 1991
• Expiry date: Apr 12, 2010

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2009/0235
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An apparatus for the regeneration of a soot-particle filter is located in the exhaust-gas line of an air-compression, fuel-injected internal-combustion engine. The apparatus regenerates the filter using a process which burns off the soot particles in the filter. A device in the intake line is actuable as a function of the engine load and engine speed and controls the cross-section of the intake line. To prevent damage to the soot-particle filter body during a transition of the internal-combustion engine into the deceleration mode, immediately after the transition into the deceleration mode of the internal-combustion engine, the process and apparatus move the device for controlling the intake-line cross-section first out of its open position into a position to reduce the line cross-section to a minimum and thereafter continuously into its open position.