US 12,085,005 B2
Systems and methods for operating passive nitrogen oxide adsorbers in exhaust aftertreatment systems
Jinyong Luo, Columbus, IN (US); Xiaobo Song, Columbus, IN (US); Xing Jin, Columbus, IN (US); David Schmidt, Indianapolis, IN (US); Lu Qiu, Columbus, IN (US); Lisa A. Orth-Farrell, Columbus, IN (US); Ying Yuan, Columbus, IN (US); Manik Narula, Columbus, IN (US); and Lars K. Henrichsen, Columbus, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Jan. 3, 2024, as Appl. No. 18/403,438.
Application 18/403,438 is a division of application No. 17/748,559, filed on May 19, 2022, granted, now 11,898,483.
Application 17/748,559 is a continuation of application No. PCT/US2020/060718, filed on Nov. 16, 2020.
Claims priority of provisional application 62/938,499, filed on Nov. 21, 2019.
Prior Publication US 2024/0151174 A1, May 9, 2024
Int. Cl. F01N 3/08 (2006.01); B01D 53/02 (2006.01); B01D 53/94 (2006.01); F01N 3/28 (2006.01); F01N 9/00 (2006.01); F02D 29/06 (2006.01)
CPC F01N 3/2892 (2013.01) [B01D 53/02 (2013.01); B01D 53/9418 (2013.01); B01D 53/9431 (2013.01); B01D 53/9481 (2013.01); B01D 53/9495 (2013.01); F01N 3/0842 (2013.01); F01N 3/2803 (2013.01); F01N 9/00 (2013.01); F02D 29/06 (2013.01); B01D 2253/108 (2013.01); B01D 2253/112 (2013.01); B01D 2253/1124 (2013.01); B01D 2257/404 (2013.01); B01D 2259/4566 (2013.01); F01N 2370/04 (2013.01); F01N 2900/10 (2013.01); F01N 2900/1602 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a catalyst for receiving and treating exhaust gas generated by an engine;
a passive NOx adsorber (PNA) positioned upstream of the catalyst and fluidly coupled with the catalyst;
a bypass valve positioned upstream of the catalyst and the PNA; and
a controller configured to:
while controlling the bypass valve to direct exhaust gas to the PNA, detect a torque demand that is greater than a threshold value;
responsive to detecting that the torque demand is greater than the threshold value, engage a motor, coupled with a battery system, with a drive shaft of the system to meet at least a portion of the torque demand; and
in response to the engagement of the motor with the drive shaft not meeting all of the torque demand, engage the engine with the drive shaft to meet a remainder of the torque demand.