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. 15, 2022
Filed:
Feb. 12, 2020
GM Global Technology Operations Llc, Detroit, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A process for detecting a low-level leak in a fuel cell system is provided. The process includes, within a computerized fuel cell controller, operating programming to monitor operation of the fuel cell system, determine an expected reduction in pressure within an anode gas loop of the fuel cell system based upon the monitored operation, determine a calibrated threshold pressure change based upon the expected reduction in pressure and a margin selected to indicate excess hydrogen gas within the anode gas loop indicating a fuel injector leak, when a fuel injector of the fuel cell system is commanded to a closed state, monitor a pressure within the anode gas loop through a time period, compare the monitored pressure within the anode gas loop through the time period to the calibrated threshold pressure change, and when the comparing indicates the excess hydrogen gas is present, taking remedial action.