Method and apparatus to enhance fractional efficiency of diesel and gasoline particulate filters
AssigneeCummins Emission Solutions Inc.
InventorsChangsheng C. Su, A. Carl McDonald, Ramakrishna Gopal Dontha, Niklas M. Schmidt, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc, Yujun Wang
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Abstract
An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.
Claims10
An exhaust gas aftertreatment system for operative connection to an engine, the exhaust gas aftertreatment system comprising:
- a particulate filter;
- an ash dispenser coupled to an exhaust conduit upstream of the particulate filter, the ash dispenser configured to release a predetermined amount of ash into exhaust gas produced by the engine so as to pre-condition the particulate filter;
- and
- a controller configured to maintain an operating parameter of the engine constant while the ash dispenser releases the predetermined amount of ash.
Dependencies are inferred from the claim text.