Method for diagnosing failure of flowmeter in measuring machine and hydrogen filling device
US-11920733-B2 · Mar 5, 2024 · US
Flowmeter failure determination method and hydrogen filling apparatus
US12565969B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12565969-B2 |
| Application number | US-202118001879-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 14, 2021 |
| Priority date | Jun 18, 2020 |
| Publication date | Mar 3, 2026 |
| Grant date | Mar 3, 2026 |
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Abstract
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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.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A flowmeter failure determination method comprising: 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, by 1) calculating a first weight of the hydrogen gas in the fuel tank before a start of filling based on a first pressure, a first temperature, and a first capacity of the fuel tank before the start of filling, wherein the first capacity is calculated using the expansion rate and the first pressure, 2) calculating a second weight of the hydrogen gas in the fuel tank after the start of filling based on a second pressure, a second temperature, and a second capacity of the fuel tank after the start of filling, wherein the second capacity is calculated using the expansion rate and the second pressure, and 3) calculating the filling amount using the first weight and the second weight; 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. 2 . The flowmeter failure determination method according to claim 1 , wherein the first capacity is calculated using a first function that is non-linear with respect to the first pressure, and the second capacity is calculated using a second function that is linear or non-linear with respect to the second pressure. 3 . The flowmeter failure determination method according to claim 2 , further comprising a step of specifying a type of the fuel tank, wherein the first function and the second function are set according to the type of the fuel tank. 4 . A hydrogen filling apparatus comprising: a measurer structured to measure a filling amount of hydrogen gas filled in a fuel tank of an automobile, using a flowmeter; an acquirer structured to acquire information of a pressure and a temperature of the fuel tank; a filling amount calculator structured to calculate the filling amount of the hydrogen gas filled in the fuel tank from the measurer 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, by 1) calculating a first weight of the hydrogen gas in the fuel tank before a start of filling based on a first pressure, a first temperature, and a first capacity of the fuel tank before the start of filling, wherein the first capacity is calculated using the expansion rate and the first pressure, 2) calculating a second weight of the hydrogen gas in the fuel tank after the start of filling based on a second pressure, a second temperature, and a second capacity of the fuel tank after the start of filling, wherein the second capacity is calculated using the expansion rate and the second pressure, and 3) calculating the filling amount using the first weight and the second weight; and a determiner structured to determine presence or absence of a failure of the flowmeter using an error value between the filling amount measured using the flowmeter and the calculated filling amount.
Assignees
Inventors
Classifications
Coriolis or gyroscopic mass flowmeters · CPC title
for refuelling vehicle fuel tanks · CPC title
Pressure · CPC title
using computers · CPC title
Very high pressure, i.e. above 80 bars · CPC title
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- What does patent US12565969B2 cover?
- 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 th…
- Who is the assignee on this patent?
- Eneos Corp
- What technology area does this patent fall under?
- Primary CPC classification F17C13/02. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 03 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).