Gas separation – With nonliquid cleaning means for separating media – With heating or cooling means
Reexamination Certificate
2008-01-07
2010-02-16
Griffin, Walter D (Department: 1797)
Gas separation
With nonliquid cleaning means for separating media
With heating or cooling means
C055S282000, C055S282100, C055S282200, C055S522000, C055S523000, C055S524000, C060S287000, C060S288000, C060S289000, C060S285000, C060S286000
Reexamination Certificate
active
07662197
ABSTRACT:
In a method for operating an exhaust-gas cleaning unit of a diesel engine including a particle filter and a nitrogen oxide storage device arranged upstream of the particle filter, wherein sulfur regeneration of the nitrogen oxide storage device is performed periodically at raised exhaust gas temperatures and, in certain phases, with a rich exhaust gas composition, and also soot regeneration of the particle filter is performed at raised exhaust gas temperatures with a lean exhaust gas composition, at least some of the sulfur regeneration and the soot regeneration phases are performed in a combined soot and sulfur regeneration phase, and for the sulfur regeneration, at least temporarily, a rich exhaust-gas composition with a temperature higher than the temperature of the lean exhaust gas composition is provided for the soot regeneration of the particle filter.
REFERENCES:
patent: 4902487 (1990-02-01), Cooper et al.
patent: 5402641 (1995-04-01), Katoh et al.
patent: 5746989 (1998-05-01), Murachi et al.
patent: 5809774 (1998-09-01), Peter-Hoblyn et al.
patent: 5974791 (1999-11-01), Hirota et al.
patent: 6161377 (2000-12-01), Boegner et al.
patent: 6230487 (2001-05-01), Blumenstock et al.
patent: 6293096 (2001-09-01), Khair et al.
patent: 6557340 (2003-05-01), Twigg et al.
patent: 6625974 (2003-09-01), Herynek
patent: 6637189 (2003-10-01), Boegner et al.
patent: 2002/0148218 (2002-10-01), Hertzberg et al.
patent: 19920515.9 (2000-11-01), None
patent: 0758713 (1997-02-01), None
Duvinags Frank
Kurze Stefan
Liebscher Thomas
Nolte Arno
Paule Markus
Bach Klaus J.
Daimler AG
Griffin Walter D
Orlando Amber
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