The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2024
Filed:
May. 19, 2022
Systems and methods for operating passive nitrogen oxide adsorbers in exhaust aftertreatment systems
Cummins Inc., Columbus, IN (US);
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);
Lars K. Henrichsen, Columbus, IN (US);
Cummins Inc., Columbus, IN (US);
Abstract
A system includes a catalyst for receiving and treating exhaust gas generated by an engine, a passive NOx adsorber (PNA) positioned upstream of the catalyst, a bypass valve positioned upstream of the catalyst and the PNA, and a controller. The controller is configured to, determine that the catalyst is operating under cold start conditions, control the bypass valve to direct exhaust gas to the PNA, determine that the catalyst is no longer operating under cold start conditions and continue to control the bypass valve to direct exhaust gas to the PNA for a predetermined duration, and after the elapse of the predetermined duration, control the bypass valve to direct exhaust gas to the catalyst bypassing the PNA. The controller is also configured to detect a high transient torque demand while the exhaust gas is provided to the PNA, and split the torque demand between the engine and an electric motor.