US 11,753,975 B2
Method and apparatus to enhance fractional efficiency of diesel and gasoline particulate filters
Changsheng C. Su, Columbus, IN (US); A. Carl McDonald, Greenwood, IN (US); Ramakrishna Gopal Dontha, Columbus, IN (US); Niklas M. Schmidt, Madison, WI (US); Nathan A. Ottinger, Lenoir City, TN (US); Z. Gerald Liu, Madison, WI (US); James C. Clerc, Columbus, IN (US); and Yujun Wang, Columbus, IN (US)
Assigned to Cummins Emission Solutions Inc., Columbus, IN (US)
Filed by CUMMINS EMISSION SOLUTIONS INC., Columbus, IN (US)
Filed on Dec. 5, 2022, as Appl. No. 18/75,031.
Application 18/075,031 is a continuation of application No. 17/430,645, granted, now 11,519,310, previously published as PCT/US2019/018163, filed on Feb. 15, 2019.
Prior Publication US 2023/0160326 A1, May 25, 2023
Int. Cl. F01N 3/021 (2006.01); F01N 9/00 (2006.01)
CPC F01N 3/021 (2013.01) [F01N 9/002 (2013.01); F01N 9/005 (2013.01); F01N 2430/04 (2013.01); F01N 2610/102 (2013.01); F01N 2610/12 (2013.01); F01N 2610/1426 (2013.01); F01N 2610/1453 (2013.01); F01N 2900/1611 (2013.01)] 10 Claims
OG exemplary drawing
 
1. 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.