US 12,275,387 B2
Hybrid system emissions management
Bijesh M. Shakya, Columbus, IN (US); and Kesavan Ramakrishnan, Columbus, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Appl. No. 18/014,403
Filed by Cummins Inc., Columbus, IN (US)
PCT Filed May 27, 2021, PCT No. PCT/US2021/034638
§ 371(c)(1), (2) Date Jan. 4, 2023,
PCT Pub. No. WO2022/010589, PCT Pub. Date Jan. 13, 2022.
Claims priority of provisional application 63/049,836, filed on Jul. 9, 2020.
Prior Publication US 2023/0286489 A1, Sep. 14, 2023
Int. Cl. B60W 10/08 (2006.01); B60W 10/06 (2006.01); B60W 10/26 (2006.01); F01N 11/00 (2006.01); F02D 29/02 (2006.01); F02D 41/02 (2006.01); F02D 41/06 (2006.01); B60W 20/16 (2016.01)
CPC B60W 10/06 (2013.01) [B60W 10/26 (2013.01); F01N 11/002 (2013.01); F02D 29/02 (2013.01); F02D 41/0255 (2013.01); F02D 41/062 (2013.01); B60W 20/16 (2016.01); B60W 2510/244 (2013.01); B60W 2510/246 (2013.01); B60W 2710/0677 (2013.01); F01N 2590/11 (2013.01); F01N 2900/08 (2013.01); F01N 2900/104 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1626 (2013.01); F02D 2200/0802 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An emissions management system for transient emissions at different engine powers of an engine in a hybrid system,
the emissions management system comprising:
a sensor assembly configured to provide an activation signal throughout engine operation and to detect information indicative of a catalyst temperature, the information including an exhaust flow rate, an exhaust temperature, an engine out NOx, and an engine power; and
a controller in communication with the sensor assembly, the controller being configured to:
receive the activation signal and, in response thereto, the information from the sensor assembly,
determine an emission penalty based on the information, the emissions penalty corresponding to a tradeoff after which increasing the exhaust temperature and engine power causes an exponential increase in the engine out NOx and exhaust flow rate;
determine, based on the emissions penalty, an emissions reduction mode at which to operate the hybrid system throughout operation of the engine so long as a combination of the engine in the emissions reduction mode and the battery are able to meet a driver demanded power, the emissions reduction mode having a threshold value for the catalyst temperature and both an emissions rate and an engine power corresponding thereto,
monitor the information indicative of the catalyst temperature,
compare the catalyst temperature to the threshold value,
cause the engine to operate in the emissions reduction mode while the catalyst temperature is less than the threshold value, and
allow the engine to operate in a normal operation mode while the catalyst temperature is greater than or equal to the threshold value.