JP2005124358A - Hydrogen leakage detecting device for vehicle with fuel cell system mounted thereto - Google Patents

Hydrogen leakage detecting device for vehicle with fuel cell system mounted thereto Download PDF

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JP2005124358A
JP2005124358A JP2003359362A JP2003359362A JP2005124358A JP 2005124358 A JP2005124358 A JP 2005124358A JP 2003359362 A JP2003359362 A JP 2003359362A JP 2003359362 A JP2003359362 A JP 2003359362A JP 2005124358 A JP2005124358 A JP 2005124358A
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fuel cell
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cell system
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JP4310736B2 (en
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Ryuichi Miyano
竜一 宮野
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Suzuki Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

<P>PROBLEM TO BE SOLVED: To improve the detecting accuracy of hydrogen leakage by detecting the hydrogen leakage by two kinds of hydrogen detectors in a hydrogen leakage detecting device for a vehicle to which a fuel cell system provided with a fuel cell and an auxiliary machine for the fuel cell is mounted, and to improve the reliability of a vehicle system. <P>SOLUTION: A plurality of hydrogen detecting points for detecting the hydrogen leakage of the fuel cell system is provided to the upper part of the vehicle provided with at least a front chamber and a compartment. Two kinds of the hydrogen detectors having different systems are provided to the hydrogen detecting point where the approximately same concentration is detected. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、燃料電池システムを搭載した車両の水素漏れ検出装置に係り、特に水素漏れを精度良く検出する燃料電池システムを搭載した車両の水素漏れ検出装置に関するものである。   The present invention relates to a hydrogen leak detection device for a vehicle equipped with a fuel cell system, and more particularly to a hydrogen leak detection device for a vehicle equipped with a fuel cell system for accurately detecting hydrogen leak.

車両の燃料電池システムには、例えば、水素と酸素との電気化学反応によって、化学エネルギを電気エネルギに直接変換するものが用いられている。この燃料電池システムにおいて、水素漏れのおそれがあることから、車両の停止時・走行中のいかなる場合でも水素漏れを検出可能な水素漏れ検出装置を設けている。   As a vehicle fuel cell system, for example, a system that directly converts chemical energy into electrical energy by an electrochemical reaction between hydrogen and oxygen is used. In this fuel cell system, since there is a risk of hydrogen leakage, a hydrogen leakage detection device capable of detecting hydrogen leakage at any time when the vehicle is stopped or running is provided.

従来、燃料電池システムの水素漏れ検出装置には、水素漏れを検出する水素センサを、プロトンと酸化物イオンを伝導するイオン伝導体とからなる固体電解質を設け、この固体電解質の表面に水素の酸化反応に対して触媒作用を有する材料の第１〜第３の電極を設けて構成したものがある。
また、燃料電池システムの水素漏れ検出装置には、水素センサにより、燃料電池の改質器又は改質器にて発生した水素の配管経路からの水素漏れを検出するものがある。
更に、燃料電池システムの水素漏れ検出装置には、水素センサとしての電気化学式センサにおいて、基体から遠ざかるに従って濃度勾配が増加した触媒の含有量である電極層を基体上に積層し、感度の良い電極を構成したものがある。
特開２００３−１６６９７２号公報 特開２００２−２２７００号公報 特開２００３−１９４７６１号公報 2. Description of the Related Art Conventionally, a hydrogen leak detection device for a fuel cell system has been provided with a hydrogen sensor that detects hydrogen leak and a solid electrolyte composed of an ion conductor that conducts protons and oxide ions. There is one configured by providing first to third electrodes made of a material having a catalytic action for the reaction.
Some hydrogen leak detection devices for fuel cell systems use a hydrogen sensor to detect hydrogen leak from a reformer of a fuel cell or a hydrogen piping path generated in the reformer.
Further, in the hydrogen leak detection device of the fuel cell system, in an electrochemical sensor as a hydrogen sensor, an electrode layer having a concentration of a catalyst whose concentration gradient increases as the distance from the substrate increases, and the electrode has a high sensitivity. There is something that made up.
JP 2003-166972 A Japanese Patent Laid-Open No. 2002-22700 Japanese Patent Laid-Open No. 2003-194761

ところで、従来、燃料電池システムの水素漏れ検出装置においては、車両の停止時・走行中のいかなる場合でも水素漏れを検出可能としていることから、水素センサには常に電力を供給しておかなければならないので、消費電力をできるだけ小さく抑える必要があった。しかしながら、消費電力の小さな水素センサにあっては、車両の走行中において水素漏れの応答が遅くなり、一方、車両の走行中に水素漏れの応答が速い水素センサにあっては、消費電力が大きくなるという相反する不都合があった。   By the way, in the conventional hydrogen leak detection device of a fuel cell system, since hydrogen leak can be detected at any time when the vehicle is stopped or running, it is necessary to always supply power to the hydrogen sensor. Therefore, it was necessary to keep power consumption as small as possible. However, in a hydrogen sensor with low power consumption, the response of hydrogen leakage is slow while the vehicle is traveling, whereas in a hydrogen sensor where response of hydrogen leakage is fast while the vehicle is traveling, power consumption is large. There was a conflicting inconvenience.

この発明は、燃料電池と燃料電池用補機とを備えた燃料電池システムを搭載した車両の水素漏れ検出装置において、少なくともフロント室と車室とを備えた車両の上部に複数の水素検出点を設け、略同じ濃度が検出される水素検出点には、方式の異なる二種類の水素検出器を設けたことを特徴とする。   The present invention provides a hydrogen leak detection device for a vehicle equipped with a fuel cell system including a fuel cell and a fuel cell auxiliary device, wherein a plurality of hydrogen detection points are provided at an upper portion of the vehicle including at least a front chamber and a vehicle interior. Two types of hydrogen detectors having different systems are provided at the hydrogen detection points where substantially the same concentration is detected.

この発明の燃料電池システムを搭載した車両の水素漏れ検出装置は、少なくともフロント室と車室とを備えた車両の上部に複数の水素検出点を設け、略同じ濃度が検出される水素検出点には、方式の異なる二種類の水素検出器を設けていることから、二種類の水素検出器によって水素漏れを検出し、水素漏れの検出精度が高く、且つ、車両システムの信頼性を高くすることができる。   A hydrogen leak detection device for a vehicle equipped with the fuel cell system of the present invention is provided with a plurality of hydrogen detection points at the top of a vehicle having at least a front chamber and a vehicle compartment, and the hydrogen detection points at which substantially the same concentration is detected. Since two types of hydrogen detectors with different methods are provided, hydrogen leaks are detected by two types of hydrogen detectors, and the hydrogen leak detection accuracy is high and the reliability of the vehicle system is increased. Can do.

この発明は、水素漏れの検出精度を高くする目的を、略同じ位置に二種類の水素検出器を設けることで実現するものである。
以下、図面に基づいてこの発明の実施例を詳細且つ具体的に説明する。 The present invention achieves the purpose of increasing the detection accuracy of hydrogen leakage by providing two types of hydrogen detectors at substantially the same position.
Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

図１〜図２は、この発明の実施例を示すものである。   1 to 2 show an embodiment of the present invention.

図１〜図２において、２は燃料電池や車両駆動用補機等を備える燃料電池システム（図示せず）を搭載した車両である。この車両２は、ボディ４内に車室６とリア室８とを備えるとともに、フード１０で覆われたフロント室１２を備えている。   1 and 2, reference numeral 2 denotes a vehicle equipped with a fuel cell system (not shown) including a fuel cell, a vehicle driving auxiliary machine, and the like. The vehicle 2 includes a vehicle compartment 6 and a rear chamber 8 in a body 4 and a front chamber 12 covered with a hood 10.

車両２には、燃料電池システムの水素漏れ検出装置１４が設けられる。この水素漏れ検出装置１４においては、少なくともフロント室１２と車室６とを備えた車両２の上部に、水素漏れを検出するための複数の水素検出点として、例えば、２つの第１水素検出点１６−１と第２水素検出点１６−２が設けられ、この場合、第１水素検出点１６−１が、例えば、フロント室１２の後端上部に設けられ、また、第２水素検出点１６−２が、例えば、車室６の後端上部に設けられ、そして、略同じ濃度が検出される各水素検出点には、方式の異なる二種類の水素検出器１８が設けられる。   The vehicle 2 is provided with a hydrogen leak detection device 14 for the fuel cell system. In this hydrogen leak detection device 14, as a plurality of hydrogen detection points for detecting hydrogen leak, for example, two first hydrogen detection points at the upper part of the vehicle 2 including at least the front chamber 12 and the vehicle compartment 6. 16-1 and a second hydrogen detection point 16-2 are provided. In this case, the first hydrogen detection point 16-1 is provided, for example, at the upper rear end of the front chamber 12, and the second hydrogen detection point 16 is provided. -2 is provided, for example, in the upper part of the rear end of the passenger compartment 6, and two types of hydrogen detectors 18 having different systems are provided at each hydrogen detection point where substantially the same concentration is detected.

この方式の異なる二種類の水素検出器１８は、応答が遅いが、消費電力が小さな電気化学式水素センサ２０と、応答が速く且つ分解性が優れ、消費電力が大きな半導体式水素センサ２２とから構成される。   The two types of hydrogen detectors 18 having different systems are composed of an electrochemical hydrogen sensor 20 having a low response but low power consumption, and a semiconductor hydrogen sensor 22 having a quick response and excellent decomposability and high power consumption. Is done.

つまり、水素検出器１８は、電気化学式水素センサ２０を備え、水素漏れと判定された場合には車両２を停止する第一の検出システム２４を構築し、この第一の検出システム２４は、常に水素漏れを検出し、応答が遅いが、消費電力が小さな系統であり、また、半導体式水素センサ２２を備え、車両２の走行時のみ水素漏れ判定が可能な第二の検出システム２６を構築し、この第二の検出システム２６は、消費電力が大きいが、応答性と分解性に優れた系統である。   In other words, the hydrogen detector 18 includes an electrochemical hydrogen sensor 20, and when it is determined that hydrogen leaks, the first detector system 24 that stops the vehicle 2 is constructed. A second detection system 26 is constructed that detects hydrogen leak and is slow in response but has low power consumption and is equipped with a semiconductor-type hydrogen sensor 22 that can determine hydrogen leak only when the vehicle 2 is running. The second detection system 26 is a system that consumes a large amount of power but has excellent responsiveness and decomposability.

図２示す如く、第一の検出システム２４には、第１水素検出点１６−１に設けられた第１電気化学式水素センサ２０−１と、第２水素検出点１６−２に設けられた第２電気化学式水素センサ２０−２と、これら第１電気化学式水素センサ２０−１と第２電気化学式水素センサ２０−２とに連絡した水素漏れ判定器２８とが設けられている。また、第二の検出システム２６には、第１水素検出点１６−１で第１電気化学式水素センサ２０−１に近接して設けられた第１半導体式水素センサ２２−１と、第２水素検出点１６−２で第２電気化学式水素センサ２０−２に近接して設けられた第２半導体式水素センサ２２−２と、これら第１半導体式水素センサ２２−１と第２半導体式水素センサ２２−２とに連絡した車両制御器３０とが設けられている。   As shown in FIG. 2, the first detection system 24 includes a first electrochemical hydrogen sensor 20-1 provided at the first hydrogen detection point 16-1 and a first hydrogen detection point 16-2 provided at the second hydrogen detection point 16-2. A two-electrochemical hydrogen sensor 20-2 and a hydrogen leak determination device 28 communicating with the first electrochemical hydrogen sensor 20-1 and the second electrochemical hydrogen sensor 20-2 are provided. The second detection system 26 includes a first semiconductor hydrogen sensor 22-1 provided in the vicinity of the first electrochemical hydrogen sensor 20-1 at the first hydrogen detection point 16-1, and a second hydrogen. A second semiconductor hydrogen sensor 22-2 provided in the vicinity of the second electrochemical hydrogen sensor 20-2 at the detection point 16-2, the first semiconductor hydrogen sensor 22-1 and the second semiconductor hydrogen sensor The vehicle controller 30 communicated with 22-2 is provided.

即ち、電気化学式水素センサ２０と半導体式水素センサ２２とは、水素漏れがあった場合に同程度の濃度を検出できるように、各水素検出点で略同じ位置に配設される。但し、この電気化学式水素センサ２０と半導体式水素センサ２２とを同じ位置に設置できない場合には、水素漏れがあった場合に同程度の濃度を検出できると予想される位置に、例えば、車室６の後部天井の左側に電気化学式水素センサ２０を配設するとともに、車室６の後部天井の右側に半導体式水素センサ２２を配設したり、あるいは、フロント室１２の後部上部で、電気化学式水素センサ２０と半導体式水素センサ２２とを、左右に振り分けて配設することも可能である。   That is, the electrochemical hydrogen sensor 20 and the semiconductor hydrogen sensor 22 are disposed at substantially the same position at each hydrogen detection point so that the same level of concentration can be detected when hydrogen leaks. However, when the electrochemical hydrogen sensor 20 and the semiconductor hydrogen sensor 22 cannot be installed at the same position, for example, in the passenger compartment at a position where a similar concentration can be detected when hydrogen leaks. An electrochemical hydrogen sensor 20 is disposed on the left side of the rear ceiling of the vehicle 6 and a semiconductor hydrogen sensor 22 is disposed on the right side of the rear ceiling of the vehicle compartment 6. It is also possible to arrange the hydrogen sensor 20 and the semiconductor hydrogen sensor 22 separately on the left and right.

この水素漏れ検出装置１４においては、図１に示す如く、電池３２に第１電線３４で水素漏れ判定器２８が接続され、この水素漏れ判定器２８に第２電線３６で電気化学式水素センサ２０が接続され、電池３２と水素漏れ判定器２８間の第１電線３４に第３電線３８が接続されている。   In this hydrogen leak detector 14, as shown in FIG. 1, a hydrogen leak determiner 28 is connected to a battery 32 via a first electric wire 34, and an electrochemical hydrogen sensor 20 is connected to the hydrogen leak determiner 28 via a second electric wire 36. A third electric wire 38 is connected to the first electric wire 34 between the battery 32 and the hydrogen leak determination device 28.

この第３電線３８途中には、車両停止手段としての緊急停止用リレー４０の接点４０Ａの一側が接続されている。この緊急停止用リレー４０の接点４０Ａの他側には、第４電線４２が接続されている。この第４電線４２には、イグニションスイッチ４４の一側に連絡した第５電線４６が接続されている。このイグニションスイッチ４４の他側には、第６電線４８で車両制御器３０が接続されている。この車両制御器３０には、第７電線５０で半導体式水素センサ２２が接続されている。イグニションスイッチ４４と車両制御器３０間の第６電線４８には、第８電線５２が接続されている。   In the middle of the third electric wire 38, one side of a contact 40A of an emergency stop relay 40 as a vehicle stop means is connected. A fourth electric wire 42 is connected to the other side of the contact 40 </ b> A of the emergency stop relay 40. A fifth electric wire 46 connected to one side of the ignition switch 44 is connected to the fourth electric wire 42. The vehicle controller 30 is connected to the other side of the ignition switch 44 by a sixth electric wire 48. A semiconductor hydrogen sensor 22 is connected to the vehicle controller 30 through a seventh electric wire 50. An eighth electric wire 52 is connected to the sixth electric wire 48 between the ignition switch 44 and the vehicle controller 30.

車両制御器３０には、第１一側信号線５４−１及び第１他側信号線５４−２で第１の補機（補機１）５６が接続され、第２信号線５８で第２の補機（補機２）６０が接続され、第３一側信号線６２−１及び第３他側信号線６２−２で第３の補機（補機Ａ）６４が接続され、第４信号線６６で第４の補機（補機Ｂ）６８が接続されている。   A first auxiliary machine (auxiliary machine 1) 56 is connected to the vehicle controller 30 through a first one-side signal line 54-1 and a first other-side signal line 54-2, and a second signal line 58 is connected to a second one. The auxiliary machine (auxiliary machine 2) 60 is connected, and the third auxiliary machine (auxiliary machine A) 64 is connected by the third one-side signal line 62-1 and the third other-side signal line 62-2, and the fourth A fourth auxiliary machine (auxiliary machine B) 68 is connected to the signal line 66.

第１の補機（補機１）５６は、第９電線７０で第８電線５２に接続されている。第２の補機（補機２）６０は、第１０電線７２で第８電線５２に接続されている。第３の補機（補機Ａ）６４は、第１１電線７４で第４電線４２に接続されている。第４の補機（補機Ｂ）６８は、第１２電線７６で第４電線４２に接続されている。   The first auxiliary machine (auxiliary machine 1) 56 is connected to the eighth electric wire 52 by the ninth electric wire 70. The second auxiliary machine (auxiliary machine 2) 60 is connected to the eighth electric wire 52 by a tenth electric wire 72. The third auxiliary machine (auxiliary machine A) 64 is connected to the fourth electric wire 42 by an eleventh electric wire 74. The fourth auxiliary machine (auxiliary machine B) 68 is connected to the fourth electric wire 42 by a twelfth electric wire 76.

前記緊急停止用リレー４０のコイル４０Ｂは、第５信号線７８で水素漏れ判定器２８に接続されている。前記電気化学式水素センサ２０は、第６信号線８０で水素漏れ判定器２８に接続されている。また、半導体式水素センサ２２は、第７信号線８２で車両制御器３０に接続されている。   The coil 40 </ b> B of the emergency stop relay 40 is connected to the hydrogen leak determination device 28 by a fifth signal line 78. The electrochemical hydrogen sensor 20 is connected to the hydrogen leak determination device 28 via a sixth signal line 80. The semiconductor hydrogen sensor 22 is connected to the vehicle controller 30 through a seventh signal line 82.

水素漏れ判定器２８と車両制御器３０とには、第８信号線８４と第９信号線８６とで、水素漏れ時の警告灯等からなる監視警告手段８８に接続されている。   The hydrogen leak determiner 28 and the vehicle controller 30 are connected to a monitoring warning means 88 including a warning light or the like at the time of hydrogen leak through an eighth signal line 84 and a ninth signal line 86.

次に、この実施例の作用を説明する。   Next, the operation of this embodiment will be described.

電気化学式水素センサ２０は、常に動作され、車両制御器３０とは別の水素漏れ判定器２８によって車両２を停止することができる。そして、車両２の走行中には、半導体式水素センサ２２が動作され、車両制御器３０にその検出信号を送っている。   The electrochemical hydrogen sensor 20 is always operated, and the vehicle 2 can be stopped by a hydrogen leak determination unit 28 different from the vehicle controller 30. During the traveling of the vehicle 2, the semiconductor hydrogen sensor 22 is operated, and the detection signal is sent to the vehicle controller 30.

そして、車両２の停止時に、規定以上の水素漏れが電気化学式水素センサ２０によって検出された場合に、水素漏れ判定器２８が、運転者に監視警告手段８８で警告を行い、運転者が車両２の起動動作を行なったとしても、車両２を起動することができない。   When the vehicle 2 is stopped and a hydrogen leak exceeding a specified level is detected by the electrochemical hydrogen sensor 20, the hydrogen leak determination unit 28 warns the driver with the monitoring warning means 88, and the driver Even if the starting operation is performed, the vehicle 2 cannot be started.

また、車両２の走行中には、規定以上の水素漏れが半導体式水素センサ２２によって検出された場合に、車両制御器３０が、運転者に監視警告手段８８で警告を行い、その車両２の停止を行う。このとき、電気化学式水素センサ２０及び半導体式水素センサ２２の双方が動作していることにより、たとえ、電気化学式水素センサ２０が故障よって正確な水素漏れの検出が行われなくても、車両２を半導体式水素センサ２２により車両制御器３０で停止させることができる。   In addition, when the vehicle 2 is traveling, if a hydrogen leak exceeding a specified level is detected by the semiconductor hydrogen sensor 22, the vehicle controller 30 warns the driver with the monitoring warning means 88, and the vehicle 2 Stop. At this time, since both the electrochemical hydrogen sensor 20 and the semiconductor hydrogen sensor 22 are operating, the vehicle 2 can be operated even if the electrochemical hydrogen sensor 20 fails and accurate hydrogen leak detection is not performed. The semiconductor controller 22 can be stopped by the vehicle controller 30.

この結果、少なくともフロント室１２と車室６とを備えた車両２の上部に複数の水素検出点を設け、略同じ濃度が検出される水素検出点には、方式の異なる二種類の水素検出器１８を設けたことから、この水素検出器１８によって水素漏れを検出することから、水素漏れの検出精度が高くなり、車両システムの信頼性を高くすることができる。   As a result, a plurality of hydrogen detection points are provided in the upper part of the vehicle 2 including at least the front chamber 12 and the vehicle compartment 6, and two types of hydrogen detectors having different systems are provided at the hydrogen detection points where substantially the same concentration is detected. Since the hydrogen detector 18 detects the hydrogen leak, the hydrogen leak detection accuracy is increased and the reliability of the vehicle system can be increased.

また、方式の異なる二種類の水素検出器１８は、電気化学式水素センサ２０と半導体式水素センサ２２とから構成されたことから、特徴のある２つの各種水素センサを用いているので、同時に両方の水素センサが故障するおそれがなく、また、一方の水素センサが故障した場合でも、他方の水素センサで水素漏れを検出することができるので、水素漏れの信頼性を向上することができる。   In addition, since the two types of hydrogen detectors 18 having different systems are composed of the electrochemical hydrogen sensor 20 and the semiconductor hydrogen sensor 22, two characteristic hydrogen sensors are used. There is no possibility that the hydrogen sensor will fail, and even if one hydrogen sensor fails, hydrogen leakage can be detected by the other hydrogen sensor, so the reliability of hydrogen leakage can be improved.

更に、水素検出器１８は、電気化学式水素センサ２０を備えて水素漏れと判定された場合には車両２を停止する第一の検出システム２４と、半導体式水素センサ２２を備えて車両２の走行時のみ水素漏れ判定が可能な第二の検出システム２６とを有することから、水素漏れと判定された場合には、直ちに車両２を停止することができ、また、車両２の走行中には、二つの水素センサ２０、２２により二系統で水素漏れを監視することができるので、水素センサ２０、２２の故障等に対して信頼性の高いシステムとすることができる。また、車両２の停止時には、消費電力の少ない電気化学式水素センサ２０を用いているので、水素漏れを検出した上で、消費電力を少なくして車両システム全体に与える影響を最小限に抑えつつ、水素漏れを検出することができる。   Furthermore, the hydrogen detector 18 includes an electrochemical hydrogen sensor 20 and a first detection system 24 that stops the vehicle 2 when it is determined that hydrogen leaks, and a semiconductor hydrogen sensor 22 that travels the vehicle 2. And the second detection system 26 capable of determining hydrogen leakage only when the vehicle 2 can be immediately stopped when it is determined that hydrogen leakage has occurred. Since the two hydrogen sensors 20 and 22 can monitor hydrogen leakage in two systems, a highly reliable system against failure of the hydrogen sensors 20 and 22 can be achieved. In addition, since the electrochemical hydrogen sensor 20 with low power consumption is used when the vehicle 2 is stopped, while detecting hydrogen leakage, the power consumption is reduced and the influence on the entire vehicle system is minimized. Hydrogen leakage can be detected.

なお、この発明においては、車両の停止時に、水素漏れを警告する必要がなければ、水素検出器の第一の検出システムにおける水素漏れ検出を車両の停止時に行えば、水素漏れ判定器の消費電力を節約した上で、水素漏れ検出を確実に行うことができる。また、水素ガスを使用して、車両の起動・停止を繰り返す機器には、全て適用することが可能である。   In the present invention, if it is not necessary to warn of hydrogen leak when the vehicle is stopped, if hydrogen leak detection in the first detection system of the hydrogen detector is performed when the vehicle is stopped, the power consumption of the hydrogen leak determiner This makes it possible to reliably detect hydrogen leaks. In addition, the present invention can be applied to all devices that use hydrogen gas to repeatedly start and stop a vehicle.

水素漏れの検出精度を向上する構造を、他の検出装置にも適用することができる。   A structure that improves the detection accuracy of hydrogen leakage can also be applied to other detection devices.

水素漏れ検出装置の制御ブロック図である。It is a control block diagram of a hydrogen leak detection apparatus. 水素漏れ検出装置を備えた車両の側面図である。It is a side view of the vehicle provided with the hydrogen leak detection apparatus.

符号の説明Explanation of symbols

２ 車両
６ 車室
１２ フロント室
１４ 水素漏れ検出装置
１６ 水素検出点
１８ 水素検出器
２０ 電気化学式水素センサ
２２ 半導体式水素センサ
２４ 第一の検出システム
２６ 第二の検出システム
２８ 水素漏れ判定器
３０ 車両制御器
４０ 緊急停止用リレー 2 Vehicle 6 Car compartment 12 Front chamber 14 Hydrogen leak detection device 16 Hydrogen detection point 18 Hydrogen detector 20 Electrochemical hydrogen sensor 22 Semiconductor hydrogen sensor 24 First detection system 26 Second detection system 28 Hydrogen leak determination device 30 Vehicle Controller 40 Emergency stop relay

Claims (3)

燃料電池と燃料電池用補機とを備えた燃料電池システムを搭載した車両の水素漏れ検出装置において、少なくともフロント室と車室とを備えた車両の上部に複数の水素検出点を設け、略同じ濃度が検出される水素検出点には、方式の異なる二種類の水素検出器を設けたことを特徴とする燃料電池システムを搭載した車両の水素漏れ検出装置。   In a hydrogen leak detection device for a vehicle equipped with a fuel cell system including a fuel cell and a fuel cell auxiliary machine, a plurality of hydrogen detection points are provided at the upper part of the vehicle including at least a front chamber and a vehicle compartment, and are substantially the same. A hydrogen leak detection device for a vehicle equipped with a fuel cell system, wherein two types of hydrogen detectors having different systems are provided at a hydrogen detection point where the concentration is detected. 前記方式の異なる二種類の水素検出器は、電気化学式水素センサと半導体式水素センサとから構成されたことを特徴とする請求項１に記載の燃料電池システムを搭載した車両の水素漏れ検出装置。   2. The hydrogen leak detection apparatus for a vehicle equipped with a fuel cell system according to claim 1, wherein the two types of hydrogen detectors having different systems are composed of an electrochemical hydrogen sensor and a semiconductor hydrogen sensor. 燃料電池と燃料電池用補機とを備えた燃料電池システムを搭載した車両の水素漏れ検出装置において、水素検出器は、電気化学式水素センサを備えて水素漏れと判定された場合には車両を停止する第一の検出システムと、半導体式水素センサを備えて車両の走行時のみ水素漏れ判定をする第二の検出システムとを有することを特徴とする燃料電池システムを搭載した車両の水素漏れ検出装置。   In a hydrogen leak detection device for a vehicle equipped with a fuel cell system including a fuel cell and a fuel cell auxiliary device, the hydrogen detector includes an electrochemical hydrogen sensor and stops the vehicle when it is determined that hydrogen leaks. A hydrogen detection device for a vehicle equipped with a fuel cell system, comprising: a first detection system configured to perform a second detection system that includes a semiconductor hydrogen sensor and performs hydrogen leak determination only when the vehicle is traveling .
JP2003359362A 2003-10-20 2003-10-20 Hydrogen leak detection device for vehicles equipped with fuel cell system Expired - Fee Related JP4310736B2 (en)

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