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:
Mar. 23, 2021
Filed:
Mar. 01, 2019
Amit Shrestha, Rochester Hills, MI (US);
Bei Jin, Rochester Hills, MI (US);
Jingjing LI, Troy, MI (US);
Fadi Estefanous, Troy, MI (US);
Lurun Zhong, Troy, MI (US);
Singalandapuram Mahedevan Boopathi, Ann Arbor, MI (US);
Mitchell Ober, Northville, MI (US);
Amit Shrestha, Rochester Hills, MI (US);
Bei Jin, Rochester Hills, MI (US);
Jingjing Li, Troy, MI (US);
Fadi Estefanous, Troy, MI (US);
Lurun Zhong, Troy, MI (US);
Singalandapuram Mahedevan Boopathi, Ann Arbor, MI (US);
Mitchell Ober, Northville, MI (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
An emissions control system for a vehicle having an exhaust system with an exhaust gas conduit and a catalytic converter configured to receive exhaust gas from an engine is provided. In one example implementation, the system includes an engine controller configured to control the engine to adjust an air to fuel ratio (lambda) thereof. The engine controller is configured to operate the engine with at least one of the following lambda control strategies (i) a first control strategy comprising operating at a first reference lambda modified by a first percent kick, and a first rich lambda lag time shorter than a first lean lambda lag time, and (ii) a second control strategy comprising operating at a second reference lambda modified by a second percent kick, and a second rich lag time longer than a second lean lambda lag time, to thereby simultaneously meet predetermined NOx and CO emissions targets.