Abnormality detecting device of fuel cell system
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
UP-0576788
(2004-10-14)
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등록번호 |
US-7718286
(2010-06-10)
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우선권정보 |
JP-2003-364524(2003-10-24) |
국제출원번호 |
PCT/IB2004/003365
(2004-10-14)
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§371/§102 date |
20060421
(20060421)
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국제공개번호 |
WO05/041333
(2005-05-06)
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발명자
/ 주소 |
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출원인 / 주소 |
- Toyota Jidosha Kabushiki Kaisha
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
3 인용 특허 :
4 |
초록
▼
An abnormality detecting device of a fuel cell system according to the invention includes a hydrogen off-gas circulation passage for making hydrogen off-gas discharged from a fuel cell flow back to an anode; a discharge passage for discharging part of the hydrogen off-gas, which is circulated throug
An abnormality detecting device of a fuel cell system according to the invention includes a hydrogen off-gas circulation passage for making hydrogen off-gas discharged from a fuel cell flow back to an anode; a discharge passage for discharging part of the hydrogen off-gas, which is circulated through the hydrogen off-gas circulation passage, from the hydrogen off-gas circulation passage; a hydrogen discharge valve provided in the discharge passage; abnormality determining means for determining whether an abnormality has occurred in opening/closing of the hydrogen discharge valve and gas state quantity detecting means for detecting a gas state quantity of the hydrogen off-gas, the gas state quantity detecting means being provided in the discharge passage at a position downstream from the hydrogen discharge valve. The abnormality determining means determines whether an abnormality has occurred in opening/closing of the hydrogen discharge valve based on the gas state quantity of the hydrogen off-gas.
대표청구항
▼
The invention claimed is: 1. An abnormality detecting device of a fuel cell system, comprising: a hydrogen off-gas circulation passage for making hydrogen off-gas discharged from a fuel cell flow back to an anode of the fuel cell; a discharge passage for discharging part of the hydrogen off-gas, wh
The invention claimed is: 1. An abnormality detecting device of a fuel cell system, comprising: a hydrogen off-gas circulation passage for making hydrogen off-gas discharged from a fuel cell flow back to an anode of the fuel cell; a discharge passage for discharging part of the hydrogen off-gas, which is circulated through the hydrogen off-gas circulation passage, from the hydrogen off-gas circulation passage; a hydrogen discharge valve provided in the discharge passage; and an abnormality determining portion for determining whether an abnormality has occurred in opening/closing of the hydrogen discharge valve, further comprising: a gas state quantity detecting portion for detecting a gas state quantity of the hydrogen off-gas, the gas state quantity detecting portion being provided in the discharge passage at a position downstream from the hydrogen discharge valve, wherein the abnormality determining portion determines whether an abnormality has occurred in opening/closing of the hydrogen discharge valve based on the gas state quantity of the hydrogen off-gas. 2. The abnormality detecting device of a fuel cell system according to claim 1, further comprising: a mixing chamber for mixing the hydrogen off-gas discharged from the discharge passage with external gas, wherein the gas state quantity detecting portion detects the gas state quantity of the hydrogen off-gas which is mixed with the external gas in the mixing chamber. 3. The abnormality detecting device of a fuel cell system according to claim 2, wherein the external gas is part of oxidizing gas to be supplied to a cathode of the fuel cell. 4. The abnormality detecting device of a fuel cell system according to claim 1, wherein the hydrogen discharge valve is an electromagnetic valve, and the abnormality determining portion determines whether an abnormality has occurred in opening/closing of the hydrogen discharge valve based on the gas state quantity detected by the gas state quantity detecting portion so as to deal with a change in an input of an opening/closing control signal to the electromagnetic valve. 5. The abnormality detecting device of a fuel cell system according to claim 4, wherein the abnormality determining portion determines whether an abnormality has occurred in opening/closing of the electromagnetic valve based on a change with time in the gas state quantity detected by the gas state quantity detecting portion so as to deal with the change in the input of the opening/closing control signal to the electromagnetic valve. 6. The abnormality detecting device of a fuel cell system according to claim 1, wherein the gas state quantity is a physical quantity related to one of a hydrogen concentration, a flow speed, a pressure, a proportion of each ingredient, a temperature and a dielectric constant of the hydrogen off-gas. 7. The abnormality detecting device of a fuel cell system according to claim 6, further comprising: a pressure sensor which is provided in the discharge passage at a position downstream from the hydrogen discharge valve, and which detects a pressure of the hydrogen off-gas. 8. The abnormality detecting device of a fuel cell system according to claim 6, further comprising: a temperature sensor which is provided in the discharge passage at a position downstream from the hydrogen discharge valve, and which detects a temperature of the hydrogen off-gas. 9. The abnormality detecting device of a fuel cell system according to claim 6, further comprising: paired electrodes which are provided in the mixing chamber and which are opposed to each other in order to detect a dielectric constant of the hydrogen off-gas. 10. The abnormality detecting device of a fuel cell system according to claim 6, further comprising: a heat wire resistance which is provided in the mixing chamber and which detects a heat conductivity of the hydrogen off-gas. 11. The abnormality detecting device of a fuel cell system according to claim 1, further comprising: a gas state quantity detecting portion for detecting the gas state quantity of the hydrogen off-gas, the gas state quantity detecting portion being provided in the discharge passage at a position upstream from the hydrogen discharge valve, wherein the abnormality determining portion detects an abnormality in opening/closing of the hydrogen discharge valve based on the gas state quantity detected by the gas state quantity detecting portion provided on each of an upstream side and a downstream side of the hydrogen discharge valve. 12. The abnormality detecting device of a fuel cell system according to claim 1, further comprising: a gas-liquid separating portion for separating the hydrogen off-gas into gas and liquid, wherein the gas state quantity detecting portion detects the gas state quantity of the hydrogen off-gas which has been separated into gas and liquid by the gas-liquid separator. 13. The abnormality detecting device of a fuel cell system according to claim 1, further comprising: a portion for dealing with a failure when the abnormality determining portion detects an abnormality in opening/closing of the hydrogen discharge valve. 14. The abnormality detecting device of a fuel cell system according to claim 1, wherein the gas state quantity detecting portion being provided in the discharge passage at a position outside the hydrogen off-gas circulation passage.
이 특허에 인용된 특허 (4)
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Ueda, Kenichiro; Murakami, Yoshikazu; Hayashi, Masanori; Aoyagi, Satoshi, Control device for fuel cell.
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Merritt Robert D. (Vancouver CAX) Gorbell Brian N. (North Vancouver CAX), Electrochemical fuel cell system with a regulated vacuum ejector for recirculation of the fluid fuel stream.
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Ueda,Kenichiro; Hayashi,Masanori; Numata,Hideo; Murakami,Yoshikazu, Fuel cell system.
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Meltser Mark Alexander ; Grot Stephen Andreas, PEM fuel cell monitoring system.
이 특허를 인용한 특허 (3)
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Kanno, Yoshihito, Fuel cell system.
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Maruo, Tsuyoshi; Naganuma, Yoshiaki; Ogawa, Tomohiro; Toida, Masashi, Fuel cell system.
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Kanno, Yoshihito, Fuel cell system and control method for an open/close mechanism thereof.
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