Title:
バルブ異常判定装置およびその方法
Document Type and Number:
Japanese Patent JP7338597
Kind Code:
B2
Abstract:
To suppress erroneous determination of abnormality of a tank valve without increasing gas discharge force.SOLUTION: A pressure of a closed space is detected by a sensor provided with the closed space formed at a downstream side from a tank valve as a first valve, the pressure of the closed space is increased by a pressure of gas charged into the tank, the gas of the closed space is released into the external by temporarily opening a second valve from a first state of closing the first valve, thus the pressure of the closed space is lowered with respect to the pressure in the first state, and a second state in which the second valve is closed is made. Then, presence or absence of valve closing abnormality of the first valve is determined by a predetermined first determination method when a pressure reduction amount to the second state is less than a predetermined threshold value, and determined by a second determination method having accuracy higher than that of the first determination method when the pressure in the second state is the threshold value or more.SELECTED DRAWING: Figure 2
Inventors:
Kazuo Yamamoto
Application Number:
JP2020160620A
Publication Date:
September 05, 2023
Filing Date:
September 25, 2020
Export Citation:
Assignee:
Toyota Motor Corporation
International Classes:
F16K51/00; G01M3/04; G05D16/20; H01M8/04; H01M8/0438; H01M8/04664
Domestic Patent References:
| JP2019149234A | ||||
| JP201892737A | ||||
| JP2007134063A | ||||
| JP291932U |
Foreign References:
| US20200119378 | ||||
| KR1020180013255A |
Attorney, Agent or Firm:
Patent Attorney Corporation Meisei International Patent Office
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