Integrated DPF-reformer

Details Integrated DPF-reformer Integrated DPF-reformer

2006-07-26

2008-10-14

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S295000, C060S297000, C060S301000, C060S311000

Reexamination Certificate

active

07434387

ABSTRACT:
A method of operating a power generation system involves operating a diesel engine to produce exhaust that is passed first through a combined DPF-fuel reformer and then a LNT. In response to the control signal to regenerate the LNT, fuel is injected into the exhaust at a rate that leaves the exhaust lean, whereby the injected fuel combusts in the combined DPF-reformer, warming it. There follows a rich phase in which fuel is injected into the exhaust at a rate that leaves the exhaust rich, whereby the DPF-reformer produces reformate and the LNT is regenerated. The combined DPF-reformer undergoes a regeneration that removes accumulated particulate matter with each LNT regeneration. Preferably, the DPF-reformer has a low thermal mass to facilitate heating. Preferably, the DPF-reformer includes a soot gasification catalyst, whereby a substantial amount of particulate matter is removed from the DPF-reformer during the rich phases.

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