JP3866136B2 - Hydrogen sensor mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hydrogen sensor mounting structure for mounting a hydrogen sensor on a vehicle compartment side.
[0002]
[Prior art]
For example, Japanese Patent Application Laid-Open No. 7-276970 discloses a technique related to the attachment of a temperature sensor to the passenger compartment side of an automobile. In this publication, a temperature sensor is attached to the roof portion. This type of temperature sensor is generally attached to the lower surface of a roof member constituting the roof portion.
[0003]
[Problems to be solved by the invention]
By the way, in a fuel cell vehicle in which a fuel cell stack is mounted and the electric motor is driven by the electric power generated by the fuel cell stack and the wheels are rotated, it is necessary to dispose a hydrogen sensor on the vehicle compartment side. However, since this hydrogen sensor is used to confirm that hydrogen has not entered the passenger compartment, there is a problem that its function cannot be fully achieved unless it is provided at a position where hydrogen can be detected efficiently. End up. Such a problem cannot be generated in the above-described temperature sensor, and is a problem peculiar to the hydrogen sensor.
[0004]
Therefore, an object of the present invention is to provide a hydrogen sensor mounting structure in which a hydrogen sensor can be disposed at a position where it can be efficiently confirmed that hydrogen has not entered.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the hydrogen sensor mounting structure according to claim 1 of the present invention mounts a hydrogen sensor (for example, the hydrogen sensor 40 in the embodiment) on the side of the vehicle interior (for example, the vehicle interior 15 in the embodiment). A bracket (for example, the bracket 20 in the embodiment) is attached between the roof members (for example, the roof members 17c and 17d in the embodiment) so as to connect the roof members to each other, and the roof member and the bracket The hydrogen sensor is attached to the surface portion of the bracket (for example, the surface portion 34 in the embodiment) positioned higher than the attachment surface portion (for example, the attachment surface portions 24, 28, 29, and the surface portions 32, 36 in the embodiment). It is characterized by.
[0006]
Thus, since a hydrogen sensor is attached via a bracket between roof members, the position of a hydrogen sensor can be arranged in a higher position compared with the case where it attaches to the lower surface of a roof member.
[0007]
The hydrogen sensor mounting structure according to claim 2 of the present invention is related to that according to claim 1, wherein the hydrogen sensor is positioned at the uppermost position (for example, the uppermost position in the embodiment) of the roof panel (for example, the roof panel 14 in the embodiment). 13).
[0008]
As described above, since the hydrogen sensor is provided at the uppermost position of the roof panel, that is, the position where the rising hydrogen collects along the curved shape of the roof panel, the sensitivity of the hydrogen sensor is improved and the hydrogen sensor protrudes toward the vehicle compartment. Is minimized.
[0009]
In the hydrogen sensor mounting structure according to claim 3 of the present invention, with respect to the hydrogen sensor mounting structure according to claim 1 or 2, a cover for covering the hydrogen sensor (for example, the cover 53 in the embodiment) is detachable from the vehicle compartment side. It is characterized by that.
[0010]
In this way, the cover covering the hydrogen sensor is detachable from the passenger compartment side, and if the cover is removed, the hydrogen sensor is exposed to the passenger compartment side, so that the hydrogen sensor can be easily replaced from the passenger compartment side. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A hydrogen sensor mounting structure according to an embodiment of the present invention will be described below with reference to the drawings. In each figure, the FR direction indicated by the arrow is the front of the vehicle body.
As shown in FIG. 1, the roof portion 12 of the vehicle body of the fuel cell vehicle to which the hydrogen sensor mounting structure of the present embodiment is applied is the uppermost middle position in the vehicle longitudinal direction and the highest central position in the vehicle lateral direction. As shown in FIG. 2, the roof panel 14 is slightly curved with an upward convex shape so as to be at the position 13, and the vehicle body 15 side of the roof panel 14 is located at both ends of the vehicle body in the left-right direction on the vehicle body. A pair of roof side rails 16 that are provided along the roof side rails 16, and both ends are fixed to the roof side rails 16 so as to extend in the left-right direction of the vehicle body. The roof members 17a to 17f are disposed.
[0012]
And among the roof members 17a to 17f, in a state along the longitudinal direction of the vehicle body between two predetermined roof members 17c and 17d adjacent to each other and having the uppermost position 13 of the roof panel 14 disposed therebetween. A bracket 20 is attached so as to connect the roof members 17c and 17d.
[0013]
Of the two predetermined roof members 17c and 17d, the center portion of the roof member 17c on the front side of the vehicle body in the left-right direction of the vehicle body is the position where the surface portions 21 and 22 at both ends in the vehicle front-rear direction are the highest as shown in FIG. The surface portion 23 positioned at the lowest position is formed immediately after the surface portion 21 at the front end, and between the surface portion 23 and the surface portion 22 at the rear end, the surface portion 23 is higher than the surface portion 23 and more than the both surface portions 21 and 22. It has a shape in which a low mounting surface portion 24 is formed.
[0014]
Of the two predetermined roof members 17c and 17d, the center portion of the roof member 17d on the rear side of the vehicle body in the left-right direction of the vehicle body is located at the highest position of the surface portions 26 and 27 at both ends in the vehicle body front-rear direction. A mounting surface portion 28 positioned at the lowest position is formed immediately after the front surface portion 26 and a mounting surface portion 29 positioned at the lowest position is formed immediately before the rear surface portion 27. Between 29, it has the shape in which the surface part 30 higher than these attachment surface parts 28 and 29 and lower than the surface parts 26 and 27 of both ends was formed.
[0015]
The bracket 20 is attached to the attachment surface portion 24 of the roof member 17c and the attachment surface portions 28 and 29 of the roof member 17d in a state of being arranged at the center position in the left-right direction of the vehicle body, and the surface portion 32 attached to the attachment surface portion 24. A surface portion 33 positioned at a position higher than the surface portion 32 provided immediately after the surface portion 32, a surface portion 34 positioned at the highest position provided immediately after the surface portion 33, and a position immediately after the surface portion 34. A surface portion 35 located at the lowest position, and a surface portion 36 attached to the attachment surface portions 28 and 29 at a position higher than the surface portion 35 provided immediately after the surface portion 35. Here, the surface portion 34 positioned at the highest position of the bracket 20 is disposed immediately below the uppermost position 13 of the roof panel 14 so as to be close thereto.
[0016]
And the hydrogen sensor 40 is attached to the surface part 34 located in the highest position of the bracket 20. As shown in FIG. 3, a pair of bolt members 41 are fixed to the surface portion 34 of the bracket 20 so as to protrude downward with a space in the left-right direction of the vehicle body, and the hydrogen sensor 40 is attached to the flange portion 42. In a state where the bolt members 41 are inserted through the formed mounting holes (not shown), the nut members 44 are screwed into the bolt members 41 to be attached to the surface portion 34 of the bracket 20.
[0017]
The hydrogen sensor 40 uses heat that burns when hydrogen, which is a gas to be detected, contacts a catalyst such as platinum, and between the detection element that has become high temperature due to hydrogen combustion and the temperature compensation element under ambient temperature. Hydrogen gas is detected by utilizing the difference in electrical resistance, and includes a body portion 46 having the flange portion 42 and a gas detection portion 45 provided in the center between the flange portions 42 and facing downward. As shown in FIG. 1, it has a connector portion 49 that is electrically connected to the wiring on the roof portion 12 side by fitting into a socket 48 attached to the bracket 20. In the hydrogen sensor 40, a gas detection unit 45 that detects hydrogen is provided directly below the uppermost position of the roof panel 14.
[0018]
The roof portion 12 has a roof lining 51 disposed below the roof panel 14, the roof side rail 16, the roof members 17 a to 17 f, and the bracket 20. An opening 52 is formed in the roof lining 51 at the position of the hydrogen sensor 40, and a cover 53 for closing the opening 52 is detachably provided so as to cover the hydrogen sensor 40. The cover 53 has a plate-like shape as a whole, and has a mesh-shaped outer cover 54 provided on the opposite side to the hydrogen sensor 40 and a hole provided on the hydrogen sensor 40 side and larger than the mesh gap of the outer cover 54. The inner cover 56 having the portion 55 is integrated. The cover 53 has a clip portion 59 provided on the other end side of the roof member 17d in a state where the locking claw portion 58 provided on one end side is hooked on the upper side of the roof lining 51 located immediately before the opening 52. The surface portion 35 is attached to the roof portion 12 by being fitted into the fitting hole 60 shown in FIG.
[0019]
According to the hydrogen sensor mounting structure of the present embodiment described above, since the hydrogen sensor 40 is mounted between the roof members 17c and 17d via the bracket 20, it is compared with the case of mounting on the lower surface of any one of the roof members 17a to 17e. Thus, the hydrogen sensor 40 can be placed at a higher position. Therefore, the hydrogen sensor 40 can be arranged at a position where it can be efficiently confirmed that hydrogen, which is lighter than air and rises, does not enter the vehicle interior.
[0020]
In addition, since the hydrogen sensor 40 is provided at the uppermost position 13 of the roof panel 14, that is, the gathering position where the rising hydrogen collects along the curved shape of the roof panel 14, the sensitivity of the hydrogen sensor 40 is improved and the vehicle by the hydrogen sensor 40 is improved. The protrusion to the compartment 15 side is minimized, and the influence on the passenger compartment space can be minimized.
[0021]
In addition, a cover 53 that covers the hydrogen sensor 40 is detachable from the vehicle compartment 15 side, and if the cover 53 is removed, the hydrogen sensor 40 is exposed to the vehicle compartment 15 side, so the hydrogen sensor 40 from the vehicle compartment 15 side is exposed. Can be easily replaced. Specifically, by removing both nut members 44 from both bolt members 41 and detaching the connector portion 49 from the socket 48, the hydrogen sensor 40 is removed from the roof portion 12, and by reversing the roof portion, 12 will be attached. Therefore, the workability of maintenance such as replacement of the hydrogen sensor 40 that needs to be periodically replaced is greatly improved.
[0022]
【The invention's effect】
As described above in detail, according to the hydrogen sensor mounting structure of the first aspect of the present invention, since the hydrogen sensor is mounted via the bracket between the roof members, the hydrogen sensor is compared with the case of mounting on the lower surface of the roof member. Can be placed at a higher position. Therefore, the hydrogen sensor can be disposed at a position where it can be efficiently confirmed that hydrogen, which is lighter than air and rises, is not entering the vehicle interior.
[0023]
According to the hydrogen sensor mounting structure of claim 2 of the present invention, since the hydrogen sensor is provided at the uppermost position of the roof panel, that is, the position where the rising hydrogen collects along the curved shape of the roof panel, the sensitivity of the hydrogen sensor is good. In addition, the protrusion to the passenger compartment side by the hydrogen sensor can be minimized, and the influence on the passenger compartment space can be minimized.
[0024]
According to the hydrogen sensor mounting structure of claim 3 of the present invention, the cover that covers the hydrogen sensor is detachable from the passenger compartment side, and the hydrogen sensor is exposed to the passenger compartment side when the cover is removed. The hydrogen sensor can be easily replaced from the room side. Therefore, the workability of maintenance such as replacement of a hydrogen sensor that needs to be periodically replaced is greatly improved.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a hydrogen sensor mounting structure according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a hydrogen sensor mounting structure according to an embodiment of the present invention as viewed from the passenger compartment side, excluding a cover and roof lining.
FIG. 3 is an enlarged perspective view showing a hydrogen sensor mounting structure according to an embodiment of the present invention, as viewed from the passenger compartment side, excluding a cover and roof lining.
[Explanation of symbols]
13 Top position 14 Roof panel 15 Car compartments 17c, 17d Roof member 20 Bracket 40 Hydrogen sensor 53 Cover

Claims (3)

A hydrogen sensor mounting structure for mounting a hydrogen sensor on the passenger compartment side,
A bracket is attached between the roof members so as to connect the roof members to each other, and the hydrogen sensor is attached to a surface portion of the bracket positioned higher than an attachment surface portion between the roof member and the bracket. A hydrogen sensor mounting structure. The hydrogen sensor mounting structure according to claim 1, wherein the hydrogen sensor is provided at an uppermost position of a roof panel. The hydrogen sensor mounting structure according to claim 1, wherein a cover that covers the hydrogen sensor is detachable from a passenger compartment side.

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