Regeneration of diesel particulate filters
AssigneeCorning Incorporated
InventorsThomas Adam Collins, Achim Karl-Erich Heibel, Robert John Locker
Life of this patent
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Abstract
Porous ceramic diesel particulate filters are regenerated to combust accumulated carbon particulates trapped therein through a controlled regeneration process wherein heat is input to the filter at a ramped or staged heating rate below that rate at which the particulate combustion process would proceed so rapidly and extensively that filter temperatures would be raised to filter-damaging levels.
Claims5
A method for regenerating a diesel particulate filter to remove trapped combustible particulate material therefrom by the step of raising the temperature of the material to a material ignition temperature, wherein heat is introduced into the filter at a heating rate below a filter-damaging threshold heating rate, wherein a first regeneration phase comprises a first heating ramp rate effective to maintain the average temperature rise rate at the filter inlet face below 100° C. /minute, and a second regeneration phase comprises a heating ramp rate effective to achieve an average temperature rise rate at the filter inlet face of at least 125° C./minute.
Dependencies are inferred from the claim text.