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. 18, 2025
Filed:
Dec. 01, 2023
Fca Us Llc, Auburn Hills, MI (US);
Mark E Ives, LaSalle, CA;
Kevin L Mason, Farmington Hills, MI (US);
Justin Neufeld, Cottam, CA;
Simon O Omekanda, Oakland Township, MI (US);
Muhammad Rizwan S Khan, Canton, MI (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
An engine control system includes one or more oxygen (O2) sensors disposed proximate to a three-way catalytic converter (TWC) in an exhaust system of the vehicle, the one or more O2 sensors each configured to measure an O2 level of exhaust gas produced by the engine. A controller is in signal communication with the one or more O2 sensors and programmed to detect a fuel shut-off (FSO) event where the engine ceases providing fuel to the engine, determine an accumulated gas flow through the TWC during the FSO event, determine the FSO event has ended, initiate an open loop fuel enrichment mode where the engine is supplied with a first fuel enrichment level having a first rich fuel/air ratio, and subsequently initiate a closed loop fuel enrichment mode where the engine is supplied with a second fuel enrichment level having a second rich fuel/air ratio, to thereby reduce NOx emissions.