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. 24, 2026
Filed:
Sep. 28, 2023
Fca Us Llc, Auburn Hills, MI (US);
Matthew Delleree, Brighton, MI (US);
Roger C Sager, Munith, MI (US);
Rebecca M Riley, Howell, MI (US);
Steve Wante, Edgewater, FL (US);
Nithin Baradwaj, Ann Arbor, MI (US);
Mary M Arito, West Lafayette, IN (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
A method for detecting a source of a misfire for an engine having turbulent jet ignition (TJI) during a service routine is presented. A diagnostic tool is coupled to an engine controller of the TJI engine. An increase in revolutions per minute (RPM) of the TJI engine is commanded. An engine roughness is measured and a baseline engine roughness for the TJI engine while all cylinders are in an active state is established. A first main spark plug is commanded to deactivate. A first test engine roughness of the TJI engine is measured based on the first main spark plug being deactivated. The baseline engine roughness is compared to the first test engine roughness. A determination is made, based on the comparison, whether the first pre-chamber is fouled.