Diesel exhaust system variable backpressure muffler

Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...

Reexamination Certificate

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Details

C060S274000, C060S287000, C060S292000, C060S295000, C060S322000, C060S324000, C181S237000, C181S254000

Reexamination Certificate

active

07337609

ABSTRACT:
The invention concerns diesel particulate filter regeneration in an exhaust system of a vehicle having a diesel engine. The particulate filter regeneration is selectively accomplished by actuating a particulate filter backpressure valve located downstream of the diesel particulate filter. Exhaust noise is attenuated for both normal driving and regeneration modes of operation by directing the exhaust flow through different flow paths in a muffler downstream of the diesel particulate filter.

REFERENCES:
patent: 4264344 (1981-04-01), Ludecke et al.
patent: 4677823 (1987-07-01), Hardy
patent: 4916897 (1990-04-01), Hayashi et al.
patent: 5357755 (1994-10-01), Gillingham et al.
patent: 6588203 (2003-07-01), Hirota et al.
patent: 6739579 (2004-05-01), Rim

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