JP4526893B2 - Fuel cell vehicle frame and fuel cell vehicle - Google Patents

Description

  The present invention relates to a frame for a fuel cell vehicle and a fuel cell vehicle. More specifically, for example, a fuel cell vehicle mounted with a fuel cell as a power source and driven by a motor driven by electricity generated by the fuel cell, The present invention relates to a fuel cell vehicle including the same.

  In the claims and the specification, the “vehicle” includes an automobile, a railway vehicle, a motorcycle, and the like.

  In recent years, fuel cell vehicles have been rapidly developed as low-emission vehicles and oil substitute vehicles. This fuel cell vehicle is equipped with a fuel tank for storing fuel for the fuel cell. This fuel tank is generally manufactured by winding reinforcing fibers such as carbon fibers around a cylindrical liner made of an aluminum alloy. In this fuel tank, for example, hydrogen is filled and stored at high pressure as fuel for the fuel cell.

By the way, according to the fuel cell vehicle described above, the travel distance can be increased by increasing the capacity of the fuel tank. However, when the capacity of the fuel tank is increased, the size of the fuel tank generally increases. Therefore, when a fuel tank having a large capacity is installed in a vehicle compartment or a luggage compartment in order to increase the travel distance of the automobile, the space is reduced. Therefore, conventionally, fuel tanks have been installed in limited places such as under the floor of an automobile or between two adjacent frames so that the vehicle compartment space and the cargo compartment space are not as narrow as possible (for example, patents). See references 1 and 2.)
Japanese Patent Laying-Open No. 2003-17107 (Claims 1, 1 and 2) Japanese Patent Laying-Open No. 2003-63457 (Claims 1, 1 and 2)

  Thus, the conventional fuel cell vehicle has the following difficulties.

  In other words, when the remaining amount of hydrogen stored in the fuel tank is reduced while the fuel cell vehicle is running, the vehicle must be driven to the hydrogen supply station in order to fill the fuel tank with hydrogen. However, the current number of hydrogen supply stations is small, and the mileage to the hydrogen supply station is long. Therefore, all the hydrogen remaining in the fuel tank is consumed until the automobile reaches the hydrogen supply station. Therefore, there is a possibility that a problem that the hydrogen supply station cannot be reached may occur. This problem is one of the factors that hinder the spread of fuel cell vehicles.

  Therefore, in order to solve this problem, the present inventor considered mounting a spare fuel tank for storing spare fuel for a fuel cell in a fuel cell vehicle. However, according to this method, it is necessary to secure a space for installing a spare fuel tank in an automobile. Since such a space is already used as a space for installing a main fuel tank, It was very difficult to secure the installation space. Therefore, it is necessary to change the layout of the vehicle body frame in order to secure the space for installing the spare fuel tank, or if such a change cannot be made, the spare fuel tank must be installed in the passenger compartment or cargo compartment. I had to. As a result, there is a difficulty in that the degree of freedom related to the layout of the body frame is limited, and the cabin space and the luggage space are narrowed.

  The present invention has been made in view of the above-described technical background, and an object of the present invention is to ensure a large vehicle compartment space and cargo space and to increase the degree of freedom with respect to the frame layout. It is an object to provide a fuel cell vehicle frame and a fuel cell vehicle including the same.

  The present invention provides the following means.

[1] A peripheral wall portion having a closed cross-sectional shape, a cavity portion is formed inside the peripheral wall portion, and the cavity portion is used as a fuel storage chamber for storing at least a part of fuel for a fuel cell. And a second peripheral wall portion spaced apart from the peripheral wall portion on the outside of the peripheral wall portion, the peripheral wall portion and the second peripheral wall portion being connected to each other via a connecting rib portion, and the cavity A fuel cell vehicle frame characterized in that a fuel in / out pipe is connected to the part via a fuel in / out channel provided in the connecting rib part .

  [2] The frame of the fuel cell vehicle according to [1], wherein a lid that closes the opening is attached to an end opening of the peripheral wall in a fuel leakage prevention state.

  [3] The frame of the fuel cell vehicle according to [1] or [2], wherein a corrosion prevention layer for preventing corrosion of the inner peripheral surface by fuel is provided on an inner peripheral surface of the peripheral wall portion.

  [4] The frame of the fuel cell vehicle according to any one of items 1 to 3, wherein a sealing layer for preventing fuel leakage is provided on at least a part of an inner peripheral surface of the peripheral wall portion.

[ 5 ] A plurality of layers of peripheral wall portions having closed cross-sectional shapes arranged at intervals in a direction from the inside toward the outside, and of the peripheral wall portions arranged on the innermost side among the peripheral wall portions of the plurality of layers. Cavities are respectively formed between the inner side and the adjacent peripheral wall parts, and at least one of the plurality of cavities stores at least a part of the fuel for the fuel cell as a filling fluid. A fuel cell vehicle frame characterized by being used as a fuel storage chamber.

[ 6 ] In the plurality of cavities, each of the cavities is filled with a filling fluid so that the filling pressure becomes higher in order from the outermost cavities to the innermost cavities. The frame of the fuel cell vehicle according to the above 5, wherein

[ 7 ] A pressure sensor that detects a filling pressure in each of the cavities, a flow rate adjustment valve that adjusts a flow rate of the filling fluid that flows through a filling fluid inlet / outlet pipe connected to each of the cavities, and a detection value of the pressure sensor frame, filling the pressure difference between the cavity adjacent the fuel cell vehicle of the preceding paragraph 6, characterized in that and a control means for controlling said flow control valve to be within a predetermined range based on.

[ 8 ] Further, an external pressure sensor for detecting an external pressure is provided, and the control means is arranged on the outermost side with the filling pressure difference between the adjacent cavities and the external pressure based on the detection value of the pressure sensor. 8. The fuel cell vehicle frame according to claim 7 , wherein the flow rate control valve is controlled so that a pressure difference with a filling pressure of the cavity portion positioned is within a predetermined range.

[ 9 ] Any one of the items 5 to 8 above , wherein a lid that closes the opening is attached to an end opening of at least one of the plurality of peripheral walls in a filling fluid leakage prevention state. The frame of the fuel cell vehicle according to the item.

[ 10 ] Any one of the preceding items 5 to 9 , wherein a corrosion prevention layer for preventing corrosion of the inner peripheral surface by a filling fluid is provided on an inner peripheral surface of at least one peripheral wall portion of the plurality of peripheral wall portions. The frame of the fuel cell vehicle according to the item.

[11] at least a portion of the inner peripheral surface of at least one of the peripheral wall portion of the peripheral wall portion of the plurality of layers, recited in any one of the aforementioned Items 5 to 10 of the sealing layer is provided to prevent leakage of fill fluid Fuel cell vehicle frame.

[ 12 ] The frame of the fuel cell vehicle according to any one of items 1 to 11 , wherein the fuel storage chamber stores spare fuel for the fuel cell.

[ 13 ] The fuel cell vehicle frame according to any one of the aforementioned Items 1 to 12 , wherein the frame is a main frame or a component frame thereof.

[14] frame subframe or frame of the fuel cell vehicle according to any one of the preceding 1 to 12 which is a configuration frame.

[15] frame frame of a fuel cell vehicle according to any one of the preceding 1 to 14 is made of aluminum or an aluminum alloy.

[ 16 ] The frame of the fuel cell vehicle according to any one of items 1 to 15 , wherein the frame is made of an extruded profile.

[17] a fuel cell vehicle, characterized by comprising either one of claims frames preceding 1-16.

  Next, the invention of each of the above items will be described below.

  In the invention of [1], the hollow portion of the frame is used as a fuel storage chamber for storing at least a part of the fuel for the fuel cell, thereby providing the following action.

  That is, when the cavity of the frame is used as a fuel storage chamber for storing a part of the fuel for the fuel cell, the size of the main fuel tank can be reduced. A room space can be secured, and the degree of freedom in frame layout can be increased. Further, when the frame cavity is used as a fuel storage chamber for storing all of the fuel for the fuel cell, it is not necessary to separately install the fuel tank itself in the vehicle. Therefore, as in the above case, it is possible to secure a large cabin space and luggage space, and it is possible to greatly increase the degree of freedom regarding the frame layout.

Further, when the hollow portion of the frame is used as a fuel storage chamber for storing a part of the fuel for the fuel cell, the remaining amount of fuel in the main fuel tank is reduced while the vehicle is running. When all the fuel is consumed, the travel distance of the vehicle can be extended by using the fuel stored in the cavity. As a result, it is possible to travel to a fuel supply station such as a hydrogen supply station.
Furthermore, since the frame has the second peripheral wall portion arranged away from the peripheral wall portion on the outer side of the peripheral wall portion, the cavity portion is protected by the second peripheral wall portion. For this reason, even when an impact is applied to the frame from the outside, fuel leakage can be reliably prevented.
The second peripheral wall portion may have a closed cross-sectional shape or an open cross-sectional shape.
Further, the fuel inlet / outlet pipe is connected to the cavity portion of the frame via the fuel inlet / outlet passage provided in the connecting rib portion, thereby providing the following effects.
That is, when the fuel inlet / outlet pipe is joined and connected to the frame, for example, by welding, thermal deformation of the second peripheral wall portion that may occur during welding is prevented by the connecting rib portion. Therefore, it is possible to reliably seal the gap between the fuel in / out pipe and the fuel in / out flow path. Further, when connecting the fuel inlet / outlet pipe to the cavity portion of the frame, it is not necessary to connect the fuel inlet / outlet pipe to the cavity portion through the second peripheral wall portion and the first peripheral wall portion. The number of joints can be reduced. Therefore, it is possible to easily connect the fuel access pipe to the frame.

  In the invention of [1], when the fuel cell vehicle is of a pure hydrogen type, for example, hydrogen (liquid hydrogen, compressed hydrogen, etc.) is stored in the cavity as the fuel for the fuel cell. On the other hand, when the fuel cell vehicle is of a reforming type, as fuel for the fuel cell, for example, hydrogen (liquid hydrogen, compressed hydrogen, etc.) or fuel as a hydrogen source supplied to the fuel reformer (Methanol, gasoline, natural gas, etc.) are stored in the cavity.

  In the invention of [1], the frame may be made of aluminum or an aluminum alloy as described later, or may be made of another metal (for example, steel material or magnesium alloy).

  In the invention of [2], since the lid that closes the opening is attached to the end opening of the peripheral wall of the frame in a fuel leakage preventing state, fuel leakage can be reliably prevented.

  In the invention of [3], since the corrosion prevention layer is provided on the inner peripheral surface of the peripheral wall portion of the frame, corrosion of the inner peripheral surface of the peripheral wall portion due to fuel can be prevented.

  In the invention of [4], since the sealing layer is provided on at least a part of the inner peripheral surface of the peripheral wall portion of the frame, fuel leakage can be prevented more reliably.

In the invention of [ 5 ], since the frame has a plurality of layers of peripheral wall portions, the rigidity of the frame is high. Therefore, even when an impact is applied to the frame from the outside, leakage of the filling fluid can be prevented.

In the invention of [ 6 ], in each of the plurality of cavities, the filling fluid is filled in each of the cavities so that the filling pressure becomes higher in order from the outermost cavities to the innermost cavities. The following effects are achieved.

  That is, in the peripheral wall portion arranged on the outermost side among the plurality of peripheral wall portions, the inward external pressure applied to the outer peripheral surface of the peripheral wall portion and the filling pressure applied outward to the inner peripheral surface of the peripheral wall portion Acts on the peripheral wall portion so as to cancel each other. Similarly, in the other peripheral wall portion, the inward filling pressure applied to the outer peripheral surface of the one peripheral wall portion and the outward filling pressure applied to the inner peripheral surface of the peripheral wall portion are applied to the peripheral wall portion so as to cancel each other. Works. Therefore, it is only necessary to set the pressure strength of each peripheral wall portion mainly taking into account only the pressure difference acting on both the inner and outer peripheral surfaces of each peripheral wall portion. For this reason, it is possible to reduce the thickness of each peripheral wall portion, thereby reducing the weight of the frame.

In the invention of [ 7 ], since the frame includes the pressure sensor, the flow rate adjusting valve, and the control means, the filling work of the filling fluid can be performed easily and reliably. The control by the control means is preferably performed so that, for example, each pressure difference is equal to or less than the set pressure strength of the corresponding peripheral wall portion.

In the invention of [ 8 ], since the frame further includes a pressure sensor for external pressure, even when the frame is disposed under an environment where the external pressure fluctuates, the filling work of the filling fluid can be easily performed. It can be done reliably.

In the invention of [ 9 ], since the lid that closes the opening is attached to the end opening of the peripheral wall in a state that prevents the filling fluid from leaking, leakage of the filling fluid can be reliably prevented.

In the invention of [ 10 ], since the corrosion prevention layer is provided on the inner peripheral surface of the peripheral wall portion, corrosion of the inner peripheral surface of the peripheral wall portion due to the filling fluid can be prevented.

In the invention of [ 11 ], since the sealing layer is provided on at least a part of the inner peripheral surface of the peripheral wall portion, the leakage of the filling fluid can be further reliably prevented.

[ 12 ] In the invention of [ 12 ], since the fuel storage chamber stores the fuel for the fuel cell (that is, the reserve fuel storage chamber), the remaining amount of fuel in the main fuel tank is small while the vehicle is running. Further, when the fuel is completely consumed, the travel distance of the vehicle can be extended by using the fuel stored in the cavity (preliminary fuel). As a result, it is possible to travel to a fuel supply station such as a hydrogen supply station.

[ 13 ] In the invention of [ 13 ], since the frame is the main frame or a component frame thereof, the above-described operational effects of the present invention can be reliably achieved.

[ 14 ] In the invention of [ 14 ], since the frame is a sub-frame or its constituent frame, the above-described operation and effect of the present invention can be reliably achieved.

[ 15 ] In the invention of [ 15 ], the frame can be reduced in weight by being made of aluminum or an aluminum alloy. Furthermore, since aluminum or aluminum alloy generally has a higher thermal conductivity than iron, even when the vehicle is driven at a high temperature such as in summer, the increase in pressure due to the thermal expansion of the fuel can be reduced. .

In the invention of [ 16 ], since the frame is made of an extruded profile, the frame can be efficiently and cost-effectively manufactured.

In the invention of [ 17 ], in the fuel cell vehicle, it is possible to secure a wide cabin space and cargo space and increase the degree of freedom with respect to the frame layout.

  Further, when the cavity of the frame is used as a fuel storage chamber for storing a part of the fuel for the fuel cell, a fuel tank for storing a part of the fuel for the fuel cell is accommodated in the cavity of the frame. If the remaining amount of fuel in the main fuel tank is low or the entire fuel is consumed while the vehicle is running, the fuel stored in the fuel storage chamber or the fuel tank in the cavity is removed. By using it, the travel distance of the vehicle can be extended. As a result, it is possible to travel to a fuel supply station such as a hydrogen supply station.

  The present invention has the following effects.

  According to the invention of [1], it is possible to secure a wide compartment space and a cargo space, and to increase the degree of freedom with respect to the frame layout.

Further, when the hollow portion of the frame is used as a fuel storage chamber for storing a part of the fuel for the fuel cell, the remaining amount of fuel in the main fuel tank is reduced while the vehicle is running. When all the fuel is consumed, the travel distance of the vehicle can be extended by using the fuel stored in the cavity. As a result, it is possible to travel to a fuel supply station such as a hydrogen supply station.
Furthermore, the cavity part as the fuel storage chamber can be protected by the second peripheral wall part, so that even when an external impact is applied to the frame, fuel leakage can be reliably prevented.
Further, the gap between the fuel in / out pipe and the fuel in / out flow path can be reliably sealed. Furthermore, the number of joints between the fuel inlet / outlet pipe and the frame can be reduced, and the connection work of the fuel inlet / outlet pipe to the frame can be easily performed.

  According to the invention [2], fuel leakage can be reliably prevented.

  According to the invention of [3], corrosion of the inner peripheral surface of the peripheral wall portion due to the fuel can be prevented.

  According to the invention [4], fuel leakage can be reliably prevented.

According to the invention of [ 5 ], since the frame has a plurality of layers of peripheral wall portions, the rigidity of the frame is high. Therefore, even when an impact is applied to the frame from the outside, leakage of the filling fluid can be prevented.

According to the invention of [ 6 ], it is possible to reduce the thickness of each peripheral wall portion of the frame, thereby reducing the weight of the frame.

According to the invention of [ 7 ], the filling operation of the filling fluid can be easily and reliably performed.

According to the invention of [ 8 ], the filling work of the filling fluid can be performed easily and reliably even when the frame is arranged in an environment where the external pressure varies.

According to the invention of [ 9 ], leakage of the filling fluid can be reliably prevented.

According to the invention of [ 10 ], corrosion of the inner peripheral surface of the peripheral wall portion due to the filling fluid can be prevented.

According to the invention of [ 11 ], the leakage of the filling fluid can be further reliably prevented.

According to the invention of [ 12 ], when the remaining amount of fuel in the main fuel tank is reduced or the whole fuel is consumed while the vehicle is running, the fuel stored in the cavity is used. The mileage of the vehicle can be extended. As a result, it is possible to travel to a fuel supply station such as a hydrogen supply station.

According to the invention of [ 13 ], the above-described effects can be surely achieved.

According to the invention of [ 14 ], the above-described effects can be surely obtained.

[ 15 ] According to the invention of [ 15 ], the weight of the frame can be reduced, and the increase in pressure due to the thermal expansion of the fuel can be reduced even when the vehicle is traveling at a high temperature such as in summer. it can.

According to the invention of [ 16 ], the frame can be manufactured efficiently and advantageously in terms of cost.

[ 17 ] According to the invention of [ 17 ], in the fuel cell vehicle, it is possible to secure a wide cabin space and cargo space, and to increase the degree of freedom with respect to the frame layout.

  Further, when the cavity of the frame is used as a fuel storage chamber for storing a part of the fuel for the fuel cell, a fuel tank for storing a part of the fuel for the fuel cell is accommodated in the cavity of the frame. If the remaining amount of fuel in the main fuel tank is low or the entire fuel is consumed while the vehicle is running, the fuel stored in the fuel storage chamber or the fuel tank in the cavity is removed. By using it, the travel distance of the vehicle can be extended. As a result, it is possible to travel to a fuel supply station such as a hydrogen supply station.

    Several preferred embodiments of the present invention will be described below with reference to the drawings.

  In FIG. 1, (10) is a frame according to the first embodiment of the present invention. In the first embodiment, the frame (10) is a side member of the subframe (2) as will be described later. Further, (1) is a fuel cell vehicle as a fuel cell vehicle provided with the frame (10).

  As shown in the figure, the fuel cell vehicle (1) includes, as a frame, two main frames (3) and (3) that are spaced apart from each other in the left-right direction of the vehicle body and extend in the front-rear direction of the vehicle body, And a subframe (2) arranged at the rear part. The fuel cell vehicle (1) further includes a fuel cell (4) (specifically, a fuel cell stack) and a main fuel tank (not shown) for storing fuel for the fuel cell (4). ing. The fuel cell (4) is disposed under the floor of the automobile (1). In addition, (5) is a wheel.

  The subframe (2) is used as a rear subframe. In the present invention, the subframe (2) may be used as a front subframe disposed at the front of the vehicle body. The sub-frame (2) supports a suspension device, a differential device, a steering device (all not shown), and the like.

  As shown in FIGS. 1 and 2, the sub-frame (2) includes a pair of side members (10) (10) that are spaced apart from each other in the left-right direction of the vehicle body and extend in the front-rear direction of the vehicle body. (10) It is composed of one or more (three in the figure) cross members (30) extending in the left-right direction of the vehicle body and interconnecting (10). In FIG. 2, reference numeral (31) denotes a connection bracket portion.

  The side member (10) of the subframe (2) is one of the constituent frames of the subframe (2), and is formed in a rod shape having a predetermined length. Furthermore, as shown in FIG. 3, joint members (20) connected to other members (not shown) are provided at both ends of the side member (10). In the present embodiment, the joint member (20) has a bush mounting cylindrical bracket portion (21). The bracket portion (21) has a bush mounting hole (21a). A bush (not shown) having a rubber elastic portion is mounted in the bush mounting hole (21a). The joint member (20) is connected to another member (for example, the main frame (3)) via a bush mounted in the bush mounting hole (21a) of the bracket portion (21).

The side member (10) is formed from a rod-like hollow material made of aluminum or an aluminum alloy extruded profile. As shown in FIGS. 3 and 4, the side member (10) has a plurality of layers of peripheral wall portions (11) and (12) arranged at intervals from the inside toward the outside. In the first embodiment, the number of layers of the peripheral wall portions (11) and (12) of the side member (10) is two. For convenience of explanation, of these two layers of the peripheral wall portions (11) and (12), the inner peripheral wall portion (11) is referred to as “first peripheral wall portion”, and the outer peripheral wall portion (12) is referred to as “second peripheral wall portion”. Call. Accordingly, the side member (10) includes a first peripheral wall portion (11) and a second peripheral wall portion (disposed from the first peripheral wall portion (11) outside the first peripheral wall portion (11) ( 12). In the present invention, the number of layers of the peripheral wall is not limited to two layers, it may be three or more layers.

  The first peripheral wall portion (11) of the side member (10) has a rectangular box-shaped closed cross-sectional shape. Therefore, the first peripheral wall portion (11) is disposed inside the first peripheral wall portion (11). Thus, a hollow portion (13) surrounded by the entire circumference is formed. The cavity (13) serves as a fuel storage chamber (6) for storing at least a part of the fuel for the fuel cell (4). In the first embodiment, the hollow portion (13) serves as a fuel storage chamber (6) for storing a spare fuel as a part of the fuel for the fuel cell (4), that is, the hollow portion (13 ) Is a reserve fuel storage room. The fuel (preliminary fuel) stored in the fuel storage chamber (6) is used when, for example, the remaining amount of fuel stored in the main fuel tank is insufficient.

  Also, the second peripheral wall portion (12) of the side member (10) has a rectangular box-shaped closed cross-sectional shape. Therefore, the second peripheral wall portion (12) has the first peripheral wall portion (11) around the entire circumference. It surrounds. In the present invention, the second peripheral wall portion (12) may have an open cross-sectional shape.

  The first peripheral wall portion (11) and the second peripheral wall portion (12) are connected to each other by a plurality (four in the present embodiment) of connecting rib portions (14) extending in the length direction. Further, as shown in FIG. 3 and FIG. 5, both end portions of the first peripheral wall portion (11) and the connecting rib portion (14) of the side member (10) are cut off, so that the side member (10 ) Are formed only by the second peripheral wall portion (12).

  Moreover, in this side member (10), as shown in FIG.3 and FIG.4, the connection rib part (14) is provided with the fuel in-and-out flow path (15) connected to the cavity part (13). More specifically, the fuel inflow / outflow passageway (15) is provided in the connecting rib portion (14) in such a manner that the connecting rib portion (14) penetrates in the connecting direction. Further, the fuel inlet / outlet pipe (16) is connected to the cavity (13) through the fuel inlet / outlet flow path (15). In this embodiment, the fuel inlet / outlet pipe (16) is inserted into the fuel inlet / outlet flow path (15), and the tip thereof reaches the cavity (13). Further, in this inserted state, the fuel inlet / outlet pipe (16) is joined and connected to the second peripheral wall portion (12) by welding (for example, MIG welding) in a fuel leakage preventing state (the joint portion W). On the other hand, the other end of the fuel inlet / outlet pipe (16) is connected to a fuel supply pipe of a fuel cell (4) or a fuel reformer (not shown).

  Further, as shown in FIG. 3, an aluminum or aluminum alloy lid body (17) that closes each opening is formed in the opening at both ends of the first peripheral wall (11) of the side member (10). It is mounted in a fuel leakage prevention state via the annular seal material (18), and in this mounted state, the lid (17) is welded to the first peripheral wall portion (11) over the entire circumference by welding (for example, MIG welding). It is joined (its joint W).

  Further, joint members (20) are joined and joined to both ends of the second peripheral wall portion (12) of the side member (10) by welding (for example, MIG welding).

  Thus, the fuel cell vehicle (1) is equipped with the main fuel tank as described above, and the fuel for the fuel cell (4) is stored in the main fuel tank. Similarly, the cavity (13) of the side member (10) of the sub-frame (2) lacks the remaining amount of fuel stored in the main fuel tank as part of the fuel for the fuel cell (4). Spare fuel for occasional use is stored. In the present invention, the filling pressure of the fuel into the cavity (13) is not limited. However, when the first peripheral wall (11) of the side member (10) is made of aluminum or aluminum alloy, the filling pressure is not limited. The pressure is preferably set in the range of 5 to 10 MPa, for example.

  Here, when the fuel cell vehicle (1) is of a pure hydrogen type, hydrogen (liquid hydrogen, compressed hydrogen, etc.) is stored as fuel in the main fuel tank and the cavity (13), respectively. This hydrogen is supplied to the fuel cell (4) together with air (oxygen) when the automobile (1) is traveling. On the other hand, when the fuel cell vehicle (1) is of the reforming type, fuel (methanol, high-grade gasoline, natural gas) as a hydrogen source supplied to a fuel reformer (not shown) is used as fuel. Etc.) are stored in the main fuel tank and the cavity (13), respectively. The fuel as the hydrogen source is supplied to the fuel cell (4) together with air (oxygen) through the fuel reformer when the automobile (1) travels. That is, the fuel as the hydrogen source becomes a hydrogen-based reformed gas through the fuel reformer, and this reformed gas is supplied to the fuel cell (4) together with air (oxygen).

  In the fuel cell vehicle (1), when the fuel in the main fuel tank is supplied to the fuel cell (4) together with air (oxygen), electricity is generated by the fuel cell (4). This electricity drives a motor (not shown), which is a power source of the automobile (1), so that the automobile (1) can run. Further, this electricity is stored in an electric storage (not shown) according to the driving situation of the automobile (1). On the other hand, the fuel in the main fuel tank is consumed as the fuel cell vehicle (1) travels.

  However, when the fuel storage amount (filling amount) in the main fuel tank is reduced or the entire fuel is consumed while the fuel cell vehicle (1) is running, it is provided in the fuel access pipe (16). By opening the open / close valve (not shown), the fuel (preliminary fuel) stored in the cavity (13) of the side member (10) of the subframe (2) is combined with air (oxygen) into the fuel cell (4 ). When the fuel cell vehicle (1) is of the reforming type, this fuel is supplied to the fuel cell (4) together with air (oxygen) through the fuel reformer.

  Thus, by supplying the fuel stored in the cavity (13) to the fuel cell (4), the travel distance of the fuel cell vehicle (1) can be extended. Therefore, according to this fuel cell vehicle (1), even when the amount of fuel stored in the main fuel tank is reduced or even when all the fuel is consumed during traveling, the fuel supply from the hydrogen supply station or the like It is possible to travel to the station.

  Furthermore, in this fuel cell vehicle (1), the cavity (13) of the side member (10) of the subframe (2) is formed as a fuel storage chamber (6), so the size of the main fuel tank is reduced. Therefore, it is possible to secure a wide cabin space and cargo space, and to increase the degree of freedom with respect to the layout of the frames (subframe (2), mainframe (3), etc.).

  If the cavity (13) is a fuel storage chamber for storing all of the fuel for the fuel cell (4), it is not necessary to separately install the fuel tank itself in the automobile (1). Therefore, as in the above case, it is possible to secure a large cabin space and luggage space, and it is possible to greatly increase the degree of freedom regarding the frame layout.

  Furthermore, since the lids (17) for closing the openings are mounted in the openings at both ends of the first peripheral wall (11) of the side member (10), the fuel leakage is prevented. Can be reliably prevented.

  In addition, the side member (10) has a second peripheral wall portion (12) disposed away from the first peripheral wall portion (11) on the outside of the first peripheral wall portion (11). The cavity (13) is protected by the second peripheral wall (12). Therefore, even when the impact is applied to the side member (10) from the outside, such as when the automobile (1) collides with an obstacle, fuel leakage can be reliably prevented.

  Furthermore, since the fuel inlet / outlet pipe (16) is connected to the cavity (13) of the side member (10) via the fuel inlet / outlet passage (15) provided in the connecting rib (14), When the pipe (16) is joined and connected to the second peripheral wall portion (12) by welding, thermal deformation of the second peripheral wall portion (12) that may occur during the welding is prevented by the connecting rib portion (14). It becomes like this. Therefore, it is possible to reliably seal the gap between the fuel in / out pipe (16) and the fuel in / out flow path (15). Further, since it is not necessary to connect the fuel inlet / outlet pipe (16) to the cavity (13) through the second peripheral wall (12) and the first peripheral wall (11), the side of the fuel inlet / outlet pipe (16) The number of joints with the member (10) can be reduced. Therefore, it is possible to easily connect the fuel access pipe (16) to the side member (10).

  Moreover, since the side member (10) is made of aluminum or an aluminum alloy, the weight of the subframe (2) can be reduced. Furthermore, since aluminum or aluminum alloy generally has a higher thermal conductivity than iron, even when the automobile (1) is driven at a high temperature such as in summer, the increase in pressure due to the thermal expansion of the fuel is reduced. be able to.

  Moreover, since the side member (10) is made of an extruded profile, the side member (10) can be manufactured efficiently and advantageously in terms of cost.

6 and 7, (10) is a frame according to the first embodiment of the present invention. In the first reference embodiment , the frame (10) is a side member of the subframe (2), as in the first embodiment.

In this side member (10), the number of layers of the peripheral wall portion (11) is one. The peripheral wall portion (11) has a rectangular box-shaped closed cross-sectional shape. Therefore, on the inner side of the peripheral wall portion (11), a hollow portion (13) surrounded by the peripheral wall portion (11) over the entire circumference. ) Is formed. The cavity (13) serves as a fuel storage chamber (6) for storing at least part of the fuel for the fuel cell (4). In the first reference embodiment , the hollow portion (13) is formed as a fuel storage chamber (6) for storing spare fuel as a part of fuel for the fuel cell (4), as in the first embodiment. That is, this cavity (13) is a reserve fuel storage chamber.

A joint member (20) is attached to each of the opening portions at both ends of the peripheral wall portion (11) of the side member (10) as a lid (17) for closing the opening portion so as to prevent fuel leakage. Further, in this mounted state, the joint member (20) is joined to the peripheral wall portion (11) by welding (for example, MIG welding) over the entire circumference (the joint portion W). That is, in the first reference embodiment , the joint member (20) also functions as a lid (17) that closes the corresponding end opening of the peripheral wall (11).

Further, a fuel inflow / outflow channel (15) is provided in a penetrating manner in the peripheral wall (11) of the side member (10). The fuel inlet / outlet pipe (16) is connected to the cavity (13) through the fuel inlet / outlet channel (15). In the first reference embodiment , the fuel inlet / outlet pipe (16) is inserted into the fuel inlet / outlet flow path (15), and the tip thereof reaches the cavity (13). In this inserted state, the fuel inlet / outlet pipe (16) is joined and connected to the peripheral wall portion (11) in a fuel leakage preventing state (the joint portion W).

  Resin that prevents corrosion of the inner peripheral surface and the cover surface by the fuel is formed on the entire inner peripheral surface of the peripheral wall portion (11) of the side member (10) and the entire cover surface of the joint member (20). A corrosion protection layer (23) of the system is laminated.

  The corrosion prevention layer (23) is formed by injecting a liquid corrosion inhibitor into the cavity (13) from the fuel entry / exit flow path (15) or the fuel entry / exit pipe (16), and the inner peripheral surface of the peripheral wall (11). And it is formed by solidifying in a laminated state on the cover surface of the joint member (20).

According to the side member (10) of the subframe (2) of the first reference embodiment , the corrosion prevention layer (23) is laminated on the inner peripheral surface of the peripheral wall portion (11), so that the peripheral wall portion (11 ) On the inner peripheral surface can be prevented.

Other configurations of the side member (10) of the sub-frame (2) of the first reference embodiment are the same as those of the first embodiment.

8 and 9, (10) is a frame according to the second embodiment of the present invention. In the second reference embodiment , the frame (10) is a side member of the subframe (2), as in the first embodiment.

In this side member (10), the number of layers of the peripheral wall portion (11) is one. The peripheral wall portion (11) has a round box-shaped closed cross-sectional shape. Therefore, on the inner side of the peripheral wall portion (11), a hollow portion (13) surrounded by the peripheral wall portion (11) over the entire circumference. ) Is formed. The cavity (13) serves as a fuel storage chamber (6) for storing at least a part of the fuel for the fuel cell (4). In the second reference embodiment , the hollow portion (13) is formed as a fuel storage chamber (6) for storing spare fuel as part of the fuel for the fuel cell (4), as in the first embodiment. That is, this cavity (13) is a reserve fuel storage chamber.

  Each joint member (20) has a fitting convex part (22) fitted to a corresponding end opening of the peripheral wall part (11) of the side member (10).

Then, the fitting protrusions (22) of the joint member (20) are fitted and attached to the openings at both ends of the peripheral wall (11) of the side member (10), thereby fitting the openings. It is blocked by the convex part (22). And in this fitting state, the joint member (20) is joined to the end portion of the peripheral wall portion (11) by the friction stir welding so as to be in a fuel leakage prevention state over the entire circumference (the joint portion W). . That is, in the second reference embodiment , the joint member (20) also functions as a lid (17) that closes the corresponding end opening of the peripheral wall (11).

Further, a fuel inflow / outflow channel (15) is provided in a penetrating manner in the peripheral wall (11) of the side member (10). The fuel inlet / outlet pipe (16) is connected to the cavity (13) through the fuel inlet / outlet channel (15). In the second reference embodiment , the fuel inlet / outlet pipe (16) is inserted into the fuel inlet / outlet flow path (15), and the tip thereof reaches the cavity (13). In this inserted state, the fuel inlet / outlet pipe (16) is joined and connected to the peripheral wall portion (11) in a fuel leakage preventing state (the joint portion W).

  Further, a sealing layer for preventing fuel leakage is formed on the entire inner peripheral surface of the peripheral wall portion (11) of the side member (10) and the entire front end surface of the fitting convex portion (22) of the joint member (20). (24) are stacked.

  The sealing layer (24) is formed by injecting a liquid sealing agent into the cavity (13) from the fuel inlet / outlet channel (15) or the fuel inlet / outlet pipe (16), and the inner peripheral surface and the joint of the peripheral wall (11). It is formed by solidifying in a laminated state on the front end surface of the fitting convex part (22) of the member (20).

  In the present invention, the sealing layer (24) may be provided only on a part of the inner peripheral surface of the peripheral wall portion (11).

According to the side member (10) of the subframe (2) of the second reference embodiment , the sealing layer (24) is laminated on the inner peripheral surface of the peripheral wall portion (11), so that fuel leakage can be further ensured. Can be prevented.

  Further, the joint member (20) is connected to the peripheral wall portion (10) in a state where the fitting convex portions (22) of the joint member (20) are fitted to the openings at both ends of the peripheral wall portion (11) of the side member (10). Since it is joined to the end of 11), the sealing performance is high, and fuel leakage can be more reliably prevented.

Other configurations of the side member (10) of the subframe (2) of the second reference embodiment are the same as those of the first embodiment.

In the present invention, in the side member (10) of the sub-frame (2) of the first embodiment, the corrosion preventing layer (23) and / or the sealing layer (23) is formed on the inner peripheral surface of the first peripheral wall (11). 24) may be provided. Further, in the side member (10) of the subframe (2) of the first embodiment and the first and second reference embodiments , fuel (for example, hydrogen) for the fuel cell (4) is placed in the cavity (13). A fuel storage alloy (for example, a hydrogen storage alloy) (not shown) for storage may be accommodated. Further, in the side member (10) of the sub-frame (2) of the first embodiment and the first and second reference embodiments , the fuel storage chamber (6) stores all the fuel for the fuel cell (4). It may be.

10 and 11, (10) is a frame according to the third embodiment of the present invention. In the third reference embodiment , the frame (10) is a side member of the subframe (2), as in the first embodiment.

  In this side member (10), the number of layers of the peripheral wall portion (11) is one. The peripheral wall portion (11) has a rectangular box-shaped closed cross-sectional shape. Therefore, on the inner side of the peripheral wall portion (11), a hollow portion (13) surrounded by the peripheral wall portion (11) over the entire circumference. ) Is formed.

Further, the fuel tank (27) is accommodated in the hollow portion (13) of the side member (10), and the fuel tank (27) is fixed to the inner peripheral surface of the peripheral wall portion (11) by a fixing jig (28 ). The fuel tank (27) stores at least part of the fuel for the fuel cell (4), and has a fuel storage chamber (6) therein. In the third reference embodiment , the fuel rank (27) stores spare fuel as part of the fuel for the fuel cell (4), that is, the fuel tank (27) is a spare fuel tank. ing. The fuel (spare fuel) stored in the fuel tank (27) is used when, for example, the remaining amount of fuel stored in the main fuel tank is insufficient.

  A fuel inlet / outlet pipe (16) is connected to the base of the fuel tank (27).

  In addition, an inlet portion (26) for inserting the fuel tank (27) into the hollow portion (13) is cut out in a part of the peripheral wall portion (11) of the side member (10). The fuel tank (27) is put into the cavity (13) from the inlet (26). A plate-like lid (29) for closing the inlet (26) is attached to the inlet (26), and in this state, the lid (29) is welded to the peripheral wall (11). (For example, MIG welding) is joined (its joint W).

  The lid (29) is provided with an insertion hole (29a) for the fuel entry / exit pipe (16), and the fuel entry / exit pipe (16) is led out through the insertion hole (29a). The other end is connected to the fuel supply pipe of the fuel cell (4) or the fuel reformer.

According to the side member (10) of the subframe (2) of the third reference embodiment , the fuel tank (27) is accommodated in the cavity (13), so that the fuel cell is the same as in the first embodiment. When the remaining amount of fuel in the main fuel tank is reduced or the entire fuel is consumed while the vehicle (1) is running, the fuel stored in the fuel tank (27) is used to The travel distance of 1) can be extended. As a result, it is possible to travel to a fuel supply station such as a hydrogen supply station.

  Furthermore, according to the side member (10) of the sub-frame (2), the fuel tank (27) is accommodated in the cavity (13), so that the size of the main fuel tank can be reduced. In addition, a large vehicle compartment space and cargo space can be secured, and the degree of freedom regarding the frame layout can be increased.

  In addition, when the fuel tank which stores all the fuel for fuel cells is accommodated in the cavity part (13), it becomes unnecessary to ensure the space which installs a fuel tank in a motor vehicle (1) separately. Therefore, as in the above case, it is possible to secure a large cabin space and luggage space, and it is possible to greatly increase the degree of freedom regarding the frame layout.

  Further, according to the side member (10) of the sub-frame (2), the inlet portion (26) for inserting the fuel tank (27) into the hollow portion (13) is cut out in the peripheral wall portion (11). Therefore, the accommodation operation and the installation operation in the hollow portion (13) of the fuel tank (27) can be easily performed.

  Moreover, since the lid (29) that closes the inlet (26) is attached to the inlet (26), dust and water are prevented from entering the cavity (13) from the inlet (26). Can be prevented. Furthermore, the rigidity of the side member (10) is improved, and the fuel tank (27) can be reliably protected.

The other structure of the side member (10) of the subframe (2) of the third reference embodiment is the same as that of the first embodiment.

In FIG. 12, (10) is a frame according to the fourth embodiment of the present invention. In the fourth reference embodiment , the frame (10) is a side member of the subframe (2), as in the first embodiment.

  In this side member (10), the number of layers of the peripheral wall portion (11) is one. The peripheral wall portion (11) has a rectangular box-shaped closed cross-sectional shape, and more specifically, has a so-called middle structure. That is, in the state in which the openings of the two substantially U-shaped channel members are joined to each other, the corresponding side edges are joined by MIG welding, TIG welding, spot welding, friction stir welding, etc. W), the both channel materials are integrated, and thereby the peripheral wall portion (11) is formed. Therefore, a hollow portion (13) surrounded by the peripheral wall portion (11) over the entire circumference is formed inside the peripheral wall portion (11).

Further, a fuel tank (27) is accommodated in the hollow portion (13) of the side member (10), and the fuel tank (27) is fixed to the inner peripheral surface of the peripheral wall portion (11) ( 28) is fixed by. The fuel tank (27) stores at least part of the fuel for the fuel cell (4), and has a fuel storage chamber (6) therein. In the fourth reference embodiment , the fuel tank (27) stores spare fuel as part of the fuel for the fuel cell (4), that is, the fuel tank (27) is a spare fuel tank. ing.

  The fuel tank (27) is housed and fixed in the cavity (13) before the two channel members described above are joined and integrated. A fuel inlet / outlet pipe (16) is connected to the base of the fuel tank (27).

  The peripheral wall (11) of the side member (10) is provided with an insertion hole (29a) for the fuel inlet / outlet pipe (16), and the fuel inlet / outlet pipe (16) passes through the insertion hole (29a). The other end is connected to the fuel supply pipe of the fuel cell (4) or the fuel reformer.

The other structure of the side member (10) of the subframe (2) of the fourth reference embodiment is the same as that of the first embodiment.

In FIG. 13, (10) is a frame according to the fifth embodiment of the present invention. In the fifth reference embodiment , the frame (10) is a side member of the subframe (2), as in the first embodiment.

  The peripheral wall portion (11) of the side member (10) has a substantially U-shaped open cross-sectional shape with one side surface opened. For this reason, a hollow portion (13) is formed inside the peripheral wall portion (11). (11a) shows an opening on one side of the peripheral wall (11).

  Further, a fuel tank (27) is accommodated in the hollow portion (13) of the side member (10), and the fuel tank (27) is fixed to the inner peripheral surface of the peripheral wall portion (11) ( 28) is fixed by. The fuel tank (27) is disposed within the outer diameter range of the peripheral wall portion (11). The fuel tank (27) is accommodated and fixed in the cavity (13) from the one side opening (11a) of the peripheral wall (11). A fuel inlet / outlet pipe (16) is connected to the base of the fuel tank (27). The fuel inlet / outlet pipe (16) is led to the outside through one side opening (11a) of the peripheral wall (11), and the other end is the fuel supply pipe of the fuel cell (4) or the fuel reformer. It is connected to the.

The other structure of the side member (10) of the subframe (2) of the fifth reference embodiment is the same as that of the first embodiment.

In the present invention, in the side member (10) of the subframe (2) of the third to fifth reference embodiments , the fuel tank (27) stores all the fuel for the fuel cell (4). Also good.

  Thus, in the present invention, the shape of the subframe (2) is not limited to that shown in FIG. For example, the sub-frame (2) may have a substantially cross-beam shape in plan view, or, as shown in FIG. 14, a U-shaped frame portion formed by bending a rod-shaped hollow material into a substantially U-shape in plan view ( 40) and a cross member (30) in which both ends of the U-shaped frame portion (40) are connected. In the subframe (2) shown in FIG. 14, the cavity inside the peripheral wall of the U-shaped frame (40) is used as the fuel storage chamber (6), or the fuel tank is accommodated in the cavity. ing. In the figure, (16) is a fuel access pipe.

  Furthermore, in the present invention, the shape of the subframe (2) is not limited to that shown in FIGS. For example, as shown in FIG. 15, the subframe (2) has two side members (10) (10) connected to each other via two cross members (30) (30). Alternatively, as shown in FIG. 16, the two side members (10) and (10) are connected to each other via two cross members (30) and (30), and the two cross members are connected. (30) (30) may be connected to each other via the reinforcing intermediate member (32).

  Furthermore, in the present invention, the mutual positional relationship between the subframe (2) and the main frame (3) is not limited to that shown in FIGS. 1, 15 and 16, and various setting changes can be made. is there.

The frames according to the first embodiment and the first to fifth reference embodiments are both side members (10) of the subframe (2), but the frame according to the present invention is the subframe (2). It is not limited to the side member (10). For example, the frame according to the present invention may be the cross member (30) of the subframe (2). In this case, in the description of the side member (10) of the subframe (2) according to the first embodiment and the first to fifth reference embodiments , the side member (10) of the subframe (2) is “crossed”. By reading “Member (30)”, the configuration will be easily understood. Furthermore, the frame according to the present invention may be both the side member (10) and the cross member (30) of the subframe (2) (that is, the subframe (2)). Furthermore, the frame according to the present invention may be the main frame (3) or its constituent frame. In this case, in the description of the side member (10) of the subframe (2) according to the first embodiment and the first to fifth reference embodiments , the side member (10) of the subframe (2) is “main”. By replacing it with “frame (3)” or “configuration frame of main frame (3)”, its configuration will be easily understood.

  Furthermore, in the frame according to the present invention, devices such as electric storage and electromagnetic valves (not shown), wiring (not shown), and the like may be accommodated in the cavity (13).

  Furthermore, the fuel cell vehicle according to the present invention is not limited to a fuel cell vehicle, and may be, for example, a fuel cell railway vehicle or a fuel cell motorcycle.

  FIG. 17 is a longitudinal sectional view showing a modified example of the side member of the subframe according to the first embodiment. The side member (10) shown in the figure will be described below with a focus on differences from the side member of the first embodiment.

  The side member (10) has a plurality of layers of peripheral wall portions (11) and (12) having a closed cross-sectional shape arranged at intervals in a direction from the inside toward the outside. In the present embodiment, the number of layers of the peripheral wall portions (11) and (12) is two. In the present invention, the number of layers of the peripheral wall portion is not limited to two, and may be, for example, three layers or four or more layers.

  In the present embodiment, for convenience of explanation, of these two layers of peripheral wall portions (11) and (12), the inner peripheral wall portion (11) is the “first peripheral wall portion (11)” and the outer peripheral wall portion (12). Are referred to as “second peripheral wall (12)”, respectively. Moreover, the cavity part (13-1) formed inside the first peripheral wall part (11) is referred to as “first cavity part (13-1)”, and the first peripheral wall part (11) and the second peripheral wall part (12). Cavities (13-2) formed between the two are called “second cavities (13-2)”. In the present embodiment, the side member (10) in which each of the hollow portions (13-1) and (13-2) is filled (stored) with gaseous fuel for the fuel cell as a filling fluid will be described as an example. That is, in this embodiment, “gaseous fuel for fuel cell” corresponds to “filling fluid”.

  In this side member (10), a joint member (20) serving as a lid that closes the opening is mounted in the opening at both ends of the second peripheral wall (12) in a fuel leakage prevention state. In this mounted state, the joint member (20) is joined to the second peripheral wall portion (12) by welding (for example, MIG welding) over the entire circumference (its joint portion W).

  In this side member (10), the fuel inlet / outlet pipes (16-1) and (16-2), which are filling fluid inlet / outlet pipes, are connected to the cavities (13-1) and (13-2).

  Each fuel inlet / outlet pipe (16-1) (16-2) is provided with a pressure sensor (R1) (R2) and a flow control valve (V1) (V2) which can be remotely controlled.

  Each pressure sensor (R1) (R2) is for detecting the fuel filling pressure of the corresponding cavity (13-1) (13-2).

  Further, an external pressure sensor (R0) for detecting external pressure is provided near the outside of the side member (10). This pressure sensor (R0) is for detecting atmospheric pressure as an external pressure at a place where the side member (10) of the present embodiment is installed.

  Each flow control valve (V1) (V2) is for adjusting the flow rate of the fuel flowing through the corresponding fuel inlet / outlet pipe (16-1) (16-2). Each flow control valve (V1) (V2) consists of a solenoid valve, for example.

  Here, for convenience of explanation, the fuel filling pressure of the first cavity (13-1), the fuel filling pressure and the atmospheric pressure of the second cavity (13-2) are P1, P2, and P0, respectively. Further, the pressure difference between the fuel filling pressure P1 of the first cavity portion (13-1) and the fuel filling pressure P2 of the second cavity portion (13-2) is ΔP1 (that is, ΔP1 = P1−P2), and the second cavity. The pressure difference between the fuel filling pressure P2 of the part (13-2) and the atmospheric pressure P0 is set to ΔP2 (that is, ΔP2 = P2−P0).

  Thus, the side member (10) is formed from the outermost cavity (that is, the second cavity (13-2)) of the two cavities (13-1) (13-2). The fuel is put into each cavity (13-1) (13-2) so that the filling pressure of the fuel becomes higher in order toward the innermost cavity (namely, the first cavity (13-1)). It is configured to be filled (stored). That is, the fuel is filled in each of the cavities (13-1) and (13-2) so as to satisfy the relationship of P0 <P2 <P1.

  In the figure, (50) is a control means. The control means (50) determines the fuel filling pressure P1 of the first cavity (13-1) and the fuel of the second cavity (13-2) based on the detection values of the pressure sensors (R1) (R2). Each flow rate control valve (V1) is set so that the pressure difference ΔP1 with the filling pressure P2 and the pressure difference ΔP2 between the fuel filling pressure P2 of the second cavity (13-2) and the atmospheric pressure P0 are within a predetermined range. ) For controlling (V2). In the present embodiment, the control means (50) includes the flow rate control valves (V1) so that the pressure differences (ΔP1) (ΔP2) are equal to or less than the set pressure resistance of the corresponding peripheral walls (11) (12). (V2) is controlled.

  Next, the operation and usage of the side member (10) will be described below.

  First, when the side member (10) is filled with fuel (stored), a fuel filling start switch (not shown) connected to the control means (50) is turned on to turn on the control means. (50) activates the two flow control valves (V1) and (V2) from the closed state to the open state. As a result, the fuel flows through the fuel inlet / outlet pipes (16-1) and (16-2) and is filled in the corresponding cavities (13-1) and (13-2).

  The atmospheric pressure (P0) and the fuel filling pressure (P1) (P2) of each cavity (13-1) (13-2) are detected by the corresponding pressure sensors (R0) (R1) (R2) and detected. The value (detection signal) is transmitted to the control means (50).

  Then, in the control means (50), based on these detected values, the pressure difference between the fuel filling pressure P1 of the first cavity (13-1) and the fuel filling pressure P2 of the second cavity (13-2). ΔP1 and a pressure difference ΔP2 between the fuel filling pressure P2 of the second cavity (13-2) and the atmospheric pressure P0 are respectively calculated.

  Then, each pressure difference (ΔP1) (ΔP2) is compared with a reference setting range stored in advance, and the corresponding flow rate control valve (R1) (R1) (ΔP2) is set so as to be within the reference setting range. R2) is activated and its valve opening changes. As a result, the flow rate of the fuel flowing through the corresponding fuel access pipes (16-1) and (16-2) is adjusted. By adjusting the flow rate of the fuel in this way, the fuel filling pressure in each cavity (13-1) (13-2) is increased while maintaining each pressure difference (ΔP1) (ΔP2) within the reference setting range. Let

  In the present embodiment, the upper limit value of the reference setting range is set to a value equal to or lower than the set withstand pressure strength of the peripheral wall portion (11) disposed between the adjacent hollow portions (13-1) and (13-2). More specifically, for example, it is set to a value equal to or lower than the fatigue strength of the peripheral wall portion (11).

  Then, the fuel filling pressure (P1) (P2) of each cavity (13-1) (13-2) is compared with the pre-stored maximum fuel filling pressure reference set value, and each fuel filling pressure is equal to this. When it is determined, the corresponding flow control valves (R1) (R2) are operated from the open state to the closed state. As a result, the flow of fuel into the corresponding cavity (13-1) (13-2) is blocked, and the fuel is sealed in the cavity (13-1) (13-2). finish.

  On the other hand, when the fuel is discharged from the side member (10), an operation opposite to the fuel charging operation described above is performed. That is, by turning on a fuel discharge start switch (not shown) connected to the control means (50), the two flow rate control valves (R1) and (R2) are closed by the control means (50). Actuated from state to open state. Thereby, the fuel with which each cavity part (13-1) (13-2) was filled distribute | circulates and discharge | releases the corresponding fuel in / out pipe | tube (16-1) (16-2). The released fuel is supplied to the fuel cell of the automobile.

  Thus, in the side member (10) of the above-described embodiment, in the state where each cavity (13-1) (13-2) is filled with fuel, of the two peripheral walls (11) (12) In the first peripheral wall portion (11), there is substantially only a pressure difference ΔP1 between the fuel filling pressure P1 of the first cavity portion (13-1) and the fuel filling pressure P2 of the second cavity portion (13-2). Therefore, the pressure strength of the first peripheral wall portion (11) may be set by mainly taking into consideration only the pressure difference ΔP1. For this reason, it is possible to reduce the thickness of the first peripheral wall portion (11). Similarly, only the pressure difference ΔP2 between the fuel filling pressure P2 of the second cavity portion (13-2) and the atmospheric pressure P0 substantially acts on the second peripheral wall portion (12). It is only necessary to set the pressure strength of the second peripheral wall portion (12) taking into account only ΔP2. Therefore, it is possible to reduce the thickness of the second peripheral wall portion (12). Therefore, in this embodiment, the weight of the side member (10) that also serves as the pressure vessel can be reduced, and further, by mounting the side member (10) on the vehicle, the fuel efficiency of the vehicle can be improved. it can.

  Further, since the side member (10) has two peripheral wall portions (11) (12), the rigidity of the frame (10) is high. Therefore, even when an impact is applied to the side member (10) from the outside, fuel leakage can be prevented.

  Furthermore, since the side member (10) has pressure sensors (R1) (R2), flow rate control valves (V1) (V2), and control means (50), the fuel filling operation is easy and reliable. Can be done.

  Further, since the side member (10) has a pressure sensor (R0) for external pressure, even if the side member (10) is disposed in an environment where the external pressure P0 varies, the fuel The filling operation can be easily and reliably performed.

  Other structures of the side member (10) of the present embodiment are the same as those of the first embodiment.

  In the present embodiment, it has been described that each cavity (13-1) (13-2) is filled with fuel as a filling fluid. However, in the present invention, each cavity can be filled with a separate filling fluid. For example, the first cavity (13-1) can be filled with fuel, and the second cavity (13-2) can be filled with an inert gas. Thus, the present invention can be filled with other types of fuel.

  As mentioned above, although several embodiment of this invention was described, it cannot be overemphasized that this invention is not limited to what was shown to the said embodiment.

  The frame of the fuel cell vehicle according to the present invention can be applied to, for example, a fuel cell vehicle, a fuel cell railway vehicle, and a fuel cell motorcycle.

1 is a schematic bottom view of a fuel cell vehicle including a subframe as a frame according to a first embodiment of the present invention. It is a top view of the subframe. It is a longitudinal cross-sectional view of the side member of the subframe. It is the sectional view on the AA line in FIG. FIG. 5 is a sectional view taken along line BB in FIG. 3. It is a longitudinal cross-sectional view of the side member of the sub-frame which concerns on the 1st reference form of this invention. It is CC sectional view taken on the line in FIG. It is a longitudinal cross-sectional view of the side member of the sub-frame which concerns on the 2nd reference form of this invention. It is the DD sectional view taken on the line in FIG. It is a partially cutaway perspective view of the side member of the subframe concerning the 3rd reference form of the present invention. It is the EE sectional view taken on the line in FIG. It is a cross-sectional view of the side member of the subframe which concerns on the 4th reference form of this invention. It is a transverse cross section of a side member of a subframe concerning the 5th reference form of the present invention. It is a top view of the sub-frame which concerns on another embodiment of this invention. It is a schematic bottom view of the fuel cell vehicle provided with the sub-frame as a frame concerning another embodiment of the present invention. It is a schematic bottom view of the fuel cell vehicle provided with the sub-frame as a frame concerning another embodiment of the present invention. It is a longitudinal cross-sectional view corresponding to FIG. 3 which shows the modification of the side member of the sub-frame which concerns on the said 1st Embodiment.

1: Fuel cell vehicle (fuel cell vehicle)
2: Subframe 3: Main frame 4: Fuel cell 6: Fuel storage room
10: Side member (sub-frame component)
11: First peripheral wall (peripheral wall)
12: Second peripheral wall
13: Cavity
14: Connecting rib
15: Fuel access path
16: Fuel inlet / outlet pipe (filling fluid inlet / outlet pipe)
17: Lid
20: Fitting member
23: Corrosion prevention layer
24: Sealing layer
26: Entrance
27: Fuel tank
29: Cover for entrance
30: Cross member (subframe)
32: Intermediate member for reinforcement (component frame of subframe)
W: Junction R1, R2: Pressure sensor V1, V2: Flow control valve
50: Control means

Claims (17)

A peripheral wall portion having a closed cross-sectional shape, and a hollow portion is formed inside the peripheral wall portion,
The cavity is used as a fuel storage chamber for storing at least a part of fuel for a fuel cell ;
Having a second peripheral wall portion arranged outside the peripheral wall portion and spaced from the peripheral wall portion;
The peripheral wall portion and the second peripheral wall portion are connected to each other via a connecting rib portion,
A fuel cell vehicle frame, wherein a fuel inlet / outlet pipe is connected to the hollow portion via a fuel inlet / outlet passage provided in the connecting rib portion .   The fuel cell vehicle frame according to claim 1, wherein a lid body that closes the opening is attached to an end opening of the peripheral wall in a fuel leakage prevention state.   The fuel cell vehicle frame according to claim 1 or 2, wherein a corrosion prevention layer for preventing corrosion of the inner peripheral surface by fuel is provided on an inner peripheral surface of the peripheral wall portion.   The frame of the fuel cell vehicle according to any one of claims 1 to 3, wherein a sealing layer for preventing fuel leakage is provided on at least a part of an inner peripheral surface of the peripheral wall portion. It has a peripheral wall portion of a closed cross-sectional shape of a plurality of layers arranged at intervals in the direction from the inside to the outside, among the peripheral wall portions of the plurality of layers, the inside of the peripheral wall portion arranged on the innermost side, Cavities are formed between adjacent peripheral walls, respectively,
  A fuel cell vehicle frame characterized in that at least one of the plurality of cavities is used as a fuel storage chamber for storing at least a part of fuel for the fuel cell as a filling fluid. In the plurality of cavities, each of the cavities is filled with a filling fluid so that the filling pressure becomes higher in order from the outermost cavities to the innermost cavities. The frame of the fuel cell vehicle according to claim 5. A pressure sensor for detecting the filling pressure of each cavity,
A flow rate adjusting valve for adjusting the flow rate of the filling fluid flowing through the filling fluid inlet / outlet pipe connected to each cavity,
The fuel according to claim 6, further comprising a control unit that controls the flow rate control valve so that a filling pressure difference between adjacent cavities falls within a predetermined range based on a detection value of the pressure sensor. Battery vehicle frame. Furthermore, it has a pressure sensor for external pressure that detects external pressure,
The control means is configured so that a filling pressure difference between adjacent cavities and a pressure difference between an external pressure and a filling pressure of the outermost cavity are within a predetermined range based on a detection value of the pressure sensor. The fuel cell vehicle frame according to claim 7, wherein the flow control valve is controlled. 9. The lid according to claim 5, wherein a lid that closes the opening is attached to an end opening of at least one of the plurality of peripheral walls in a state of preventing filling fluid from leaking. 9. Fuel cell vehicle frame. The corrosion prevention layer which prevents the corrosion of the said internal peripheral surface by a filling fluid is provided in the internal peripheral surface of the at least 1 peripheral wall part among the said multiple layers of peripheral wall parts. Fuel cell vehicle frame. The fuel according to any one of claims 5 to 10, wherein a sealing layer for preventing leakage of a filling fluid is provided on at least a part of an inner peripheral surface of at least one peripheral wall portion of the plurality of peripheral wall portions. Battery vehicle frame. The frame of the fuel cell vehicle according to any one of claims 1 to 11, wherein the fuel storage chamber stores spare fuel for the fuel cell. The frame of a fuel cell vehicle according to any one of claims 1 to 12, wherein the frame is a main frame or a constituent frame thereof. The frame of a fuel cell vehicle according to any one of claims 1 to 12, wherein the frame is a sub-frame or a constituent frame thereof. The frame of a fuel cell vehicle according to any one of claims 1 to 14, wherein the frame is made of aluminum or an aluminum alloy. The frame of a fuel cell vehicle according to any one of claims 1 to 15, wherein the frame is made of an extruded shape member. A fuel cell vehicle comprising the frame according to any one of claims 1 to 16.

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