Method and apparatus to enhance fractional efficiency of diesel and gasoline particulate filters
AssigneeCummins Emission Solutions Inc.
InventorsChangsheng C. Su, A. Carl McDonald, JR., 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.
Claims32
A particulate filter comprising:
- a housing;
- a filter substrate positioned in the housing;
- and
- an aqueous solution or suspension applied to the filter substrate, the aqueous solution or suspension configured to decompose or evaporate into a predetermined amount of ash in response to exposure to heat so as to pre-condition the filter substrate.
An exhaust gas aftertreatment system comprising:
- a particulate filter;
- and
- an ash dispenser positioned upstream of the particulate filter, the ash dispenser configured to release ash into exhaust gas upstream of the particulate filter to pre-condition the particulate filter.
An exhaust gas aftertreatment system for an engine, the exhaust gas aftertreatment system comprising:
- a particulate filter;
- a filter positioned upstream of the particulate filter, the filter configured to release an additive material from which ash is generated, which ash pre-conditions the particulate filter;
- and
- a controller configured to maintain an operating parameter of the engine constant while the filter releases the additive material.
A particulate filter comprising:
- a housing comprising an inlet cone;
- a filter substrate positioned in the housing;
- and
- a predetermined amount of ash attached to the inlet cone and configured to be released into exhaust gas flowing through the inlet cone to pre-condition the filter substrate.
Dependencies are inferred from the claim text.