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. 03, 2026
Filed:
Jun. 14, 2021
Applicant:
Eneos Corporation, Tokyo, JP;
Inventors:
Assignee:
ENEOS Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F17C 13/02 (2006.01); F17C 5/06 (2006.01); G01F 1/84 (2006.01); G01F 25/10 (2022.01);
U.S. Cl.
CPC ...
F17C 13/02 (2013.01); F17C 5/06 (2013.01); G01F 1/84 (2013.01); G01F 25/15 (2022.01); F17C 2221/012 (2013.01); F17C 2225/0123 (2013.01); F17C 2225/036 (2013.01); F17C 2250/032 (2013.01); F17C 2250/043 (2013.01); F17C 2265/065 (2013.01);
Abstract
A flowmeter failure determination method includes: a step of measuring a filling amount of hydrogen gas filled in a fuel tank of an automobile, using a flowmeter; a step of acquiring information of a pressure and a temperature of the fuel tank; a step of calculating the filling amount of the hydrogen gas filled in the fuel tank based on the acquired pressure and temperature and a capacity of the fuel tank in which an expansion rate of the fuel tank is considered; and a step of determining presence or absence of a failure of the flowmeter using an error value between the measured filling amount and the calculated filling amount.