US 12,404,794 B2
Valve arrangement for split-flow close-coupled catalyst
Anand Srinivasan, Greenwood, IN (US); and John K. Heichelbech, 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, 2023, as Appl. No. 18/530,012.
Application 18/530,012 is a continuation of application No. 17/609,681, granted, now 11,867,111, previously published as PCT/US2019/031542, filed on May 9, 2019.
Prior Publication US 2024/0110499 A1, Apr. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F01N 3/28 (2006.01); B01D 53/94 (2006.01); B01J 19/00 (2006.01); B01J 23/745 (2006.01); B01J 29/072 (2006.01); F01N 3/021 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01); F01N 9/00 (2006.01); F01N 13/00 (2010.01); F01N 13/08 (2010.01); G05D 7/06 (2006.01)
CPC F01N 3/2892 (2013.01) [B01D 53/9418 (2013.01); B01D 53/9436 (2013.01); B01D 53/944 (2013.01); B01D 53/9477 (2013.01); B01D 53/9495 (2013.01); B01J 19/0033 (2013.01); B01J 23/745 (2013.01); B01J 29/072 (2013.01); F01N 3/021 (2013.01); F01N 3/106 (2013.01); F01N 3/2006 (2013.01); F01N 3/2066 (2013.01); F01N 3/2803 (2013.01); F01N 9/00 (2013.01); F01N 13/011 (2014.06); G05D 7/0635 (2013.01); B01D 2255/20723 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/904 (2013.01); B01D 2255/915 (2013.01); F01N 13/087 (2013.01); F01N 2240/12 (2013.01); F01N 2330/38 (2013.01); F01N 2370/04 (2013.01); F01N 2410/02 (2013.01); F01N 2550/10 (2013.01); F01N 2550/22 (2013.01); F01N 2610/1453 (2013.01); F01N 2900/0602 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An aftertreatment system comprising:
a first exhaust gas path comprising a heater;
a second exhaust gas path comprising a first decomposition chamber configured to receive reductant and a first selective catalytic reduction catalyst downstream of the first decomposition chamber;
a combined exhaust gas path downstream of the first exhaust gas path and the second exhaust gas path, the combined exhaust gas path configured to receive exhaust gas from both the first exhaust gas path and the second exhaust gas path;
a selector valve configured to divert the exhaust gas between the first exhaust gas path and the second exhaust gas path based on a temperature of the exhaust gas; and
a controller programmed to control the selector valve such that:
the selector valve diverts the exhaust gas to the first exhaust gas path when the temperature of the exhaust gas is equal to or less than a predetermined temperature threshold; and
the selector valve diverts the exhaust gas to the second exhaust gas path when the temperature of the exhaust gas is greater than the predetermined temperature threshold; wherein:
the heater is configured to heat the exhaust gas received in the first exhaust gas path;
the first decomposition chamber is configured to receive the exhaust gas that has been diverted to the second exhaust gas path by the selector valve; and
the first selective catalytic reduction catalyst is configured to receive the exhaust gas from the first decomposition chamber.