Title:
VALVE ABNORMALITY DETERMINATION DEVICE AND METHOD
Document Type and Number:
Japanese Patent JP2022053799
Kind Code:
A
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
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Inventors:
YAMAMOTO KAZUO
Application Number:
JP2020160620A
Publication Date:
April 06, 2022
Filing Date:
September 25, 2020
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F16K51/00; G01M3/04; G05D16/20; H01M8/04; H01M8/0438; H01M8/04664
Domestic Patent References:
| JP2019149234A | 2019-09-05 | |||
| JP2018092737A | 2018-06-14 | |||
| JP2007134063A | 2007-05-31 | |||
| JPH0291932U | 1990-07-20 |
Foreign References:
| US20200119378A1 | 2020-04-16 | |||
| KR20180013255A | 2018-02-07 |
Attorney, Agent or Firm:
Meisei International Patent Office
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