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:
Jul. 28, 2026
Filed:
Jan. 30, 2025
Cummins Inc., Columbus, IN (US);
Nandagopal Methil Sudhakaran, Columbus, IN (US);
Cummins Inc., Columbus, IN (US);
Abstract
A fuel system includes including a fuel rail configured to receive fuel from a fuel supply and to supply fuel to a plurality of fuel injectors. A pressure sensor is operatively coupled with and configured to sense pressure of fuel in the fuel rail. An exhaust oxygen sensor operatively coupled with and configured to sense oxygen content of exhaust output by the engine. An electronic control system is configured to receive a fuel pressure signal from the pressure sensor, detect a predetermined frequency of the pressure signal, receive an exhaust oxygen signal from the exhaust oxygen sensor, and in response to an output of the resonating filter and the exhaust oxygen signal, diagnose one of an under-fueling failure mode and an over-fueling failure mode of a diagnosed injector of the plurality of injectors.