Device for removing soot from diesel exhaust

US4989408A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Rolf Leonhard · Schwieberdingen, DE
• Ulrich Projahn · Graus, ES

Key dates

• Filing date: Sep 29, 1989
• Grant date: Feb 5, 1991
• Expiry date: Sep 29, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/30
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A device for removing solid particles, in particular soot particles, from the exhaust gas of internal combustion engines includes a centrifugal separator or cyclone 11 to separate the untreated gas flow 10 into coaxially removed pure gas flow 23 and a particle-enriched carrier gas flow 24 and includes a combustion device 12 for burning the solid particles carried in the carrier gas flow. In order to reduce the manufacturing costs and to obtain a compact, small-volume assembly the combustion housing 16 of the combustion device 12 is integrated in the collecting piece 133 of the cyclone housing 13 such that an annular channel 18 is left between the combustion hosuing 16 and the collecting piece 133 through which a carrier gas flow is passed so as to enter the combustion housing 16 at the end of the latter facing away from the interior of the cyclone housing 13, to pass through a filter 27 heated up above combustion temperature of the solid particles and to finally enter into the vortex core of the cyclone and be removed together with pure gas flow 23. The free end of the collecting piece is closed so as to prevent carrier gas from escaping.