Aerodynamic Brake System

Abstract

To reduce a size of an aerodynamic brake device.SOLUTION: An aerodynamic brake system comprises: a resistance plate which generates air resistance against travel wind of a vehicle, takes a storage state stored inside a vehicle body of the vehicle during non-operation, and takes a projection state projecting from the vehicle body during operation; a lock mechanism which locks the resistance plate in the storage state; and an operation device which releases lock by the lock mechanism, and causes a part of the resistance plate to project from the vehicle body. The operation device is pyrotechnic.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an aerodynamic braking system. [Background technology]

[0002] Conventionally, an aerodynamic brake device for railway vehicles has been proposed that includes a locking mechanism that holds the aerodynamic brake plate in a stored position, an arm portion provided around the oscillating shaft, and a double-acting double-rod cylinder that releases the locking mechanism by pushing the rod when moving forward, and pushes the rod when moving backward to push the arm and rotate the oscillating shaft in the direction that stores the aerodynamic brake plate (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-144922 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, the aerodynamic brake device has been equipped with a locking mechanism and a double-rod cylinder, which tends to make the entire device large. This means that the space required to accommodate the aerodynamic brake device is large, which limits the space available in the passenger compartment, etc.

[0005] Therefore, the technology of the present disclosure aims to reduce the size of the aerodynamic brake device. [Means for solving the problem]

[0006] In order to solve the above problems, the present disclosure employs the following configuration. a resistance plate that generates air resistance against wind generated by a vehicle traveling, the resistance plate being stored in a body of the vehicle when inactive and being protruding from the body when active; a locking mechanism that locks the resistance plate in the stored state; an operating device that releases the locking mechanism and causes a portion of the resistance plate to protrude from the vehicle body; Equipped with The actuator is a pyrotechnic Aerodynamic braking system.

[0007] The actuator includes a piston that causes the resistance plate to protrude from the vehicle body. The aerodynamic braking system mentioned above.

[0008] The actuator causes the resistance plate to protrude from the vehicle body by releasing gas. The aerodynamic braking system mentioned above.

[0009] a drive unit that displaces the resistance plate to the stored state, The locking mechanism includes a locking portion that detachably locks the engaged portion of the resistance plate. The aerodynamic braking system mentioned above.

[0010] a plurality of the actuating devices for causing the resistance plates to protrude from the vehicle body; A different actuator is actuated each time the resistance plate is displaced from the retracted state to the extended state. The aerodynamic braking system mentioned above.

[0011] the resistance plate forms a part of the vehicle body in the stored state and is connected to the vehicle via a rotation axis perpendicular to the traveling direction of the vehicle; The rotation shaft is connected to a part of the resistance plate on the opposite side to the running direction. The aerodynamic braking system mentioned above.

[0012] The resistance plate is a flat member, and slides on a plane on which the resistance plate extends to change from the stored state to the extended state. The aerodynamic braking system mentioned above.

[0013] The resistance plate has a protruding portion that protrudes in the traveling direction of the vehicle along at least a part of the periphery of a wind-receiving surface that faces the traveling wind. The aerodynamic braking system mentioned above.

[0014] A plurality of combinations of the resistance plate and the actuator are provided. The aerodynamic braking system mentioned above.

[0015] a plurality of the resistance plates connected to be displaced in unison; The actuation device causes any one of the plurality of resistance plates to protrude from the vehicle body. The aerodynamic braking system mentioned above.

[0016] The above-described configurations can be combined or deleted as much as possible without departing from the spirit of the present disclosure. [Effects of the Invention]

[0017] According to the present disclosure, the weight of the aerodynamic brake device can be reduced. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic perspective view showing an example of a vehicle equipped with an aerodynamic brake system. [Figure 2] FIG. 2 is a cross-sectional view for explaining an example of the configuration and operation of an aerodynamic brake system. [Figure 3] FIG. 3 is a cross-sectional view illustrating a pyrotechnic device as an example of an actuator. [Figure 4] FIG. 4 is a cross-sectional view for explaining an example of the operation of the aerodynamic brake system. [Figure 5] FIG. 5 is a perspective view showing an example of a vehicle according to the second embodiment. [Figure 6] FIG. 6 is a cross-sectional view for explaining an example of the configuration and operation of an aerodynamic brake system according to the third embodiment. [Figure 7] FIG. 7 is a perspective view showing an example of a resistance plate according to the fourth embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of an aerodynamic brake system according to the fifth embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of an aerodynamic brake system according to the sixth embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of an aerodynamic brake system according to the seventh embodiment. [Figure 11] FIG. 11 is a diagram illustrating an example of an aerodynamic brake system according to the eighth embodiment. [Figure 12] FIG. 12 is a diagram illustrating an example of an aerodynamic brake system that includes one actuator for protruding each of the resistance plates. [Figure 13] FIG. 13 is a diagram illustrating an example of a vehicle equipped with an aerodynamic brake system according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0019] An aerodynamic brake system according to an embodiment of the present disclosure will be described below with reference to the drawings. Note that the configurations and combinations thereof in the embodiments are merely examples, and additions, omissions, substitutions, and other modifications of the configurations are possible as appropriate without departing from the spirit and scope of the present disclosure. The present disclosure is not limited to the embodiments, but is limited only by the claims.

[0020] <Embodiment 1> FIG. 1 is a schematic perspective view showing an example of a vehicle equipped with an aerodynamic brake system. The vehicle 10 is equipped with resistance plates 1 (1A, 1B) that protrude from its body and generate air resistance against the traveling wind. The resistance plates 1 are stored inside the body of the vehicle 10 when not in operation, and protrude from the body of the vehicle 10 when in operation. In the example of FIG. 1, the vehicle 10 is equipped with multiple resistance plates 1 on its ceiling. For convenience, resistance plate 1A is shown in a stored state and resistance plate 1B is shown in a protruding state, but all resistance plates 1 may be in the same state. Furthermore, the aerodynamic brake system may include one or more resistance plates 1, and the number of resistance plates 1 is not particularly limited. For example, in an emergency, when a traveling vehicle 10 activates the aerodynamic brake system, the resistance plates 1 are displaced from the stored state to the protruding state. Then, the protruding resistance plates 1 are exposed to the traveling wind, generating air resistance and reducing the traveling speed of the vehicle 10. 1, for convenience, the forward, backward, left, right, up and down directions are shown with the traveling direction of the vehicle 10 being the front. Since the traveling direction of the vehicle 10 is opposite in the so-called uphill direction and downhill direction, the vehicle 10 may be equipped with an aerodynamic brake system that operates when traveling forward and an aerodynamic brake system (not shown) that operates when traveling backward.

[0021] FIG. 2 is a cross-sectional view illustrating an example of the configuration and operation of an aerodynamic brake system. (1) shown in the upper part of FIG. 2 illustrates an example of an aerodynamic brake system in which the resistance plate 1 is in a stored state. The aerodynamic brake system includes the resistance plate 1 described above, an actuator 2, a control unit 3, a locking claw 4, an elastic member 5, a support wall 6, a rotating shaft 7, and a stopper 8. When the resistance plate 1 protrudes from the body of the vehicle 10, it generates air resistance against the traveling wind. The actuator 2 is an actuating device that causes the resistance plate 1 to spring up and protrude from the body of the vehicle 10. When activated, the actuator 2 protrudes a piston 21, which disengages the locking claw 4 from the vehicle 10 and causes the resistance plate 1 to spring up.

[0022] FIG. 3 is a cross-sectional view illustrating a pyrotechnic device as an example of an actuator. The actuator 2 includes a piston 21 held so as to be able to protrude from an opening in the housing, an elastic body 22 that maintains the piston 21 housed within the cylindrical housing, and a gas generator 23. The tip of the piston 21 is formed obliquely with respect to a plane perpendicular to the axial direction of the cylindrical actuator 2. The elastic body 22 is, for example, a compression spring, and urges the piston 21 toward the inside of the housing of the actuator 2. The gas generator 23 is, for example, an existing pyrotechnic gas generator. When an igniter included in the gas generator 23 is activated in response to a signal from the control unit 3, the gas generating agent is ignited and combustion gas is released. The gas pressure of the combustion gas causes the piston 21 to protrude from the opening in the housing against the urging force of the elastic body 22. The actuator 2 does not have to be a pyrotechnic device, and may be, for example, an electromagnet provided on the vehicle body side that generates an attractive or repulsive force between it and a magnet provided on the resistance plate 1 side, and when activated, the repulsive force causes the resistance plate 1 to bounce up.

[0023] The control unit 3 is, for example, a part of a computer provided in the vehicle 10, and controls the operation of the vehicle 10, for example. The actuator 2 is activated in response to an operation by the driver or an emergency stop instruction received from another device.

[0024] The locking claw (engaging portion) 4 and the elastic member 5 constitute a locking mechanism that engages with the body (engaged portion) of the vehicle 10 to maintain the resistance plate 1 in the stored state. The locking mechanism is connected to the resistance plate 1 and is housed inside the vehicle 10 in the stored state. In the stored state, the resistance plate 1 is flush with the exterior wall surface of the vehicle 10. In this state, the locking claw 4 functions as an engaging portion that engages with the edge of the exterior wall surface of the vehicle 10. The locking claw 4 is connected to the resistance plate 1 via the elastic member 5. One end of the elastic member 5 is connected to the locking claw 4, and the other end is connected to a support wall 6 provided on the resistance plate 1. The elastic member 5 is, for example, a compression spring, and biases the locking claw 4 in a predetermined direction (i.e., the direction of engaging with the engaged portion). The locking claw 4 also has a slope whose thickness decreases in the biasing direction of the elastic member 5. When the actuator 2 is activated, the inclined surface collides with the piston 21, and the locking claw 4 is displaced against the force of the elastic member 5. (2) shown in the middle of Figure 2 shows an example of a state in which the actuator 2 is activated and the piston 21 protrudes. As the piston 21 protrudes, the locking claw 4 moves toward the support wall 6, and the engagement with the vehicle 10 is released. At the same time, as the piston 21 protrudes, at least a portion of the resistance plate 1 protrudes from the vehicle 10 (ceiling). (3) shown in the bottom of Figure 2 shows a state in which the end of the resistance plate 1 on the traveling direction side (front side) has been flipped up. The flipped-up resistance plate 1 is caught in the traveling wind blowing from the front to the rear and rotates in a direction that stands up perpendicular to the body of the vehicle 10.

[0025] The pivot shaft 7 rotatably connects one end of the resistance plate 1 (the rear end in the traveling direction of the vehicle 10) to the vehicle 10. The stopper 8 is disposed between the resistance plate 1 and the outer surface of the vehicle body 10 and restricts the rotation of the resistance plate 1 so that the orientation of the resistance plate 1 displaced to the protruding state is maintained at a predetermined angle with respect to the traveling wind. FIG. 4 is a cross-sectional view illustrating an example of the operation of the aerodynamic brake system. FIG. 4 shows an example of the resistance plate 1 displaced to the protruding state. In FIG. 4, the stopper 8 is sandwiched between the resistance plate 1 and the vehicle 10, thereby restricting the rotation of the resistance plate 1. In the example of FIG. 4, the predetermined angle is approximately perpendicular to the traveling wind. The stopper 8 may be connected to the resistance plate 1 or the vehicle 10. Furthermore, when the stopper 8 is connected to the outside of the vehicle body, it is preferable that the stopper 8 has a shape that generates as little air resistance as possible when the vehicle 10 is traveling. In particular, the stopper 8 may act as a rectifying vane for the traveling wind when the resistance plate 1 is in the retracted state.

[0026] <Effects> The aerodynamic brake system according to this embodiment can be installed on the roof of the vehicle 10 as long as there is enough space to accommodate the actuator 2 and the locking mechanism. This allows for a more compact and lightweight system compared to, for example, a system that includes a pipe that supplies hydraulic fluid to a cylinder to push up the aerodynamic brake plate. Furthermore, because the resistance plate 1 according to this embodiment deploys quickly due to the wind generated by the vehicle's movement, the operating speed is improved compared to, for example, a system that includes aerodynamic brake plates that deploy in the front-to-rear direction in a mechanically linked relationship with each other.

[0027] <Embodiment 2> FIG. 5 is a perspective view showing an example of a vehicle according to the second embodiment. Note that the same components as those in the above-described embodiment are given the corresponding reference numerals, and description thereof will be omitted. FIG. 5 also shows a resistance plate 1A in a stored state and a resistance plate 1B in a protruding state. In the example of FIG. 5, the resistance plate 1 protrudes from the side of the vehicle 10, not from the ceiling. Even when the resistance plate 1 is provided on the side of the vehicle 10, the aerodynamic brake system as shown in FIGS. 1 to 4 can be installed. Furthermore, the resistance plate 1 is not limited to being provided on only one of the ceiling or side, but may also be provided on both.

[0028] <Embodiment 3> 6 is a cross-sectional view illustrating an example of the configuration and operation of an aerodynamic brake system according to the third embodiment. The same components as those in the above-described embodiments are given the same reference numerals, and their description will be omitted. In this embodiment, the resistance plate 1 is not raised by the piston 21 of the actuator 2, but by a gas generator 11 that emits combustion gas.

[0029] (1) shown in the upper part of Fig. 6 shows an example of an aerodynamic brake system in which the resistance plate 1 is in a stored state. In this embodiment, the locking mechanism includes a drive unit 9, instead of the elastic member 5, that mechanically displaces the locking claw 4 based on a control signal from the control unit 3, for example, to release the engagement with the vehicle 10. (2) shown in the middle part of Fig. 6 shows a state in which the drive unit 9 has moved the locking claw 4 toward the support wall 6. In this embodiment, the control unit 3 first causes the drive unit 9 to unlock the resistance plate 1 in response to an operation by the driver of the vehicle 10 or an emergency stop command received from another device.

[0030] The aerodynamic brake system also includes a gas generator 11 that discharges combustion gas instead of the actuator 2. The gas generator 11 does not include the piston 21 or elastic body 22 of the actuator 2 shown in FIG. 3, and discharges combustion gas from a gas discharge hole toward the resistance plate 1. (3) shown in the lower part of FIG. 6 illustrates a state in which the combustion gas discharged from the gas generator 11 causes at least a portion of the resistance plate 1, the end portion on the traveling direction side (front side), to be flipped up. According to this embodiment, the strength of the resistance plate 1 can be reduced compared to when the resistance plate 1 is flipped up by the piston 21. The flipped-up resistance plate 1 is engulfed in traveling wind flowing from the front to the rear and rotates in a direction perpendicular to the body of the vehicle 10. In this embodiment, the drive unit 9 and the gas generator 11 correspond to an operating device that releases the lock by the locking mechanism and flips up the resistance plate 1. It should be noted that the aerodynamic brake system does not need to include the drive unit 9 if sufficient force can be obtained to release the lock and lift up the resistance plate 1 by the release of combustion gas by the gas generator 11.

[0031] <Embodiment 4> FIG. 7 is a perspective view showing an example of a resistance plate according to a fourth embodiment. Note that the same components as those in the above-described embodiments are denoted by corresponding reference numerals, and their description will be omitted. In this embodiment, the resistance plate 1 includes a protruding portion 12 that protrudes toward the vehicle's traveling direction when the resistance plate 1 is in the protruding state, along the periphery of the wind-receiving surface 13 that receives the traveling wind during operation. In this manner, the resistance plate 1 in the protruding state and the process of the resistance plate 1 being displaced to the protruding state also incorporate the traveling wind, thereby enabling the resistance plate 1 to be deployed quickly and improving braking performance. Note that the protruding portion 12 is provided along at least a portion of the periphery of the wind-receiving surface 13. The protruding portion 12 may also be connected to the wind-receiving surface 13 at an angle ranging from 80° to 150°, for example. The protruding direction of the protruding portion 12 is not strictly limited to the traveling direction, as long as it extends in a direction that easily incorporates the traveling wind when the resistance plate 1 is fully opened.

[0032] <Embodiment 5> FIG. 8 is a diagram illustrating an example of an aerodynamic brake system according to a fifth embodiment. FIG. 8 is a schematic cross-sectional view of a vehicle 10 viewed from above. Note that the same components as those in the above-described embodiments are given the same reference numerals, and their description will be omitted. The resistance plate 1 in this embodiment slides to protrude outward from the side of the vehicle 10. Also, as in the fourth embodiment, the resistance plate 1 is provided with a protruding portion 12 along at least a portion of the periphery of its wind-receiving surface 13. The protruding portion 12 may be connected to the wind-receiving surface 13 at an angle ranging from 80° to 150°, for example.

[0033] In addition, the operating device such as the actuator 2 is configured to extend at least a part of the resistance plate 1. The resistance plate 1 is pushed out, for example horizontally, along the direction in which it is located. Note that the resistance plate 1 slides along a guide rail or the like (not shown). Even in this configuration, the resistance plate 1 and the protruding portion 12 catch the wind while the vehicle is running, and the resistance plate 1 is pulled out to the protruding state and functions as a brake for the vehicle 10. In addition, in the stored state, the protruding portion 12 may be flush with the outer wall surface of the vehicle 10.

[0034] <Embodiment 6> FIG. 9 is a diagram for explaining an example of an aerodynamic brake system according to a sixth embodiment. Note that components identical to those in the above-described embodiments are given corresponding reference numerals, and their explanation will be omitted. In this embodiment, the resistance plate 1 is connected to a motor-controlled reel 15 via a wire 14. The reel 15 is controlled based on a signal from the control unit 3, and by winding up the wire 14, the resistance plate 1, which has been displaced to a protruding state, can be returned to a stored state. (1) shown in the upper part of FIG. 9 shows an example of an aerodynamic brake system in which the resistance plate 1 is in a stored state. (2) shown in the lower part of FIG. 9 shows a state in which the end of the resistance plate 1 on the traveling direction side (front side) is flipped up. As shown in the figure, when the resistance plate 1 transitions from a stored state to a protruding state, the wire 14 is unwound from the reel 15, and then the resistance plate 1 can be stored by winding up the wire 14. In this way, a configuration for mechanically closing the deployed resistance plate 1 may be combined. The resistance plate 1 is stored when the aerodynamic brake system is activated. This is done later when the vehicle 10 is moved.

[0035] <Embodiment 7> FIG. 10 is a diagram illustrating an example of an aerodynamic brake system according to a seventh embodiment. Note that components identical to those in the above-described embodiments are denoted by corresponding reference numerals and will not be described again. In this embodiment, multiple actuators 2 are provided to protrude a single resistance plate 1, and each time the aerodynamic brake system is activated, different actuators 2 are activated in sequence. While a pyrotechnic gas generator 11 cannot be activated repeatedly, multiple activations can be achieved by using multiple actuators in sequence. The actuator according to this embodiment may include, for example, a cartridge-type actuator 2 or a magazine that can accommodate multiple gas generators 11, and a mechanism for replacing the cartridges after each use. Specifically, the igniter portion of the actuator may be formed into a cartridge shape, and multiple cartridges may be loaded into the magazine, which may then be attached to an actuator that houses, for example, a piston and magazine. After one cartridge is used, the magazine is slid open and a new cartridge is inserted. After all cartridges have been used, the magazine may be replaced with one containing unused cartridges. Sliding and replacing the cartridges can be activated by remote electrical control or mechanically performed using a motor or solenoid. When the aerodynamic brake system is used repeatedly in this way, it can be combined with the configuration shown in the sixth embodiment, in which the aerodynamic brake system is returned to each state after activation.

[0036] <Embodiment 8> FIG. 11 is a diagram illustrating an example of an aerodynamic brake system according to an eighth embodiment. FIG. 11 is a schematic cross-sectional view of a vehicle 10 viewed from the front (front). Components identical to those in the above-described embodiments are given corresponding reference numerals, and descriptions thereof will be omitted. In this embodiment, three resistance plates 1 are arranged side by side in the left-right direction, and the respective rotation shafts 7 are integrally formed and rotate together with the resistance plates 1. Therefore, when the actuator 2 flips up one resistance plate 1, the other resistance plates 1 are displaced in conjunction with the rotation shafts 7 via the rotation shafts 7. When the energy with which the actuator 2 projects the piston 21 is sufficiently large, the actuation device may project any one of the plurality of resistance plates 1.

[0037] FIG. 12 is a diagram illustrating an example of an aerodynamic brake system having one actuator 2 for projecting each of the resistance plates 1. FIG. 12 shows a vehicle 1 from the front. 12 is a schematic cross-sectional view of the resistance plate 1 as viewed from the direction of arrow 0. In the example of FIG. 12, there are multiple combinations of resistance plate 1 and actuator 2, and each resistance plate 1 is displaced to a protruding state by the paired actuator 2. In this case, the rotating shaft 7 does not rotate in conjunction with the resistance plate 1.

[0038] <Modification> An example in which a plurality of aerodynamic brake systems of this embodiment are provided on a vehicle will now be described with reference to FIG. 13. In FIG. 13, the aerodynamic brake system includes a brake system (a brake system including resistor plate 1B: a first aerodynamic brake system) that operates when vehicle 10 is traveling forward, and a brake system (a brake system including resistor plate 1A: a second aerodynamic brake system) that operates when vehicle 10 is traveling backward. That is, resistor plate 1B is arranged so that its wind-receiving surface 13 faces forward during operation, and resistor plate 1A is arranged so that its wind-receiving surface 13 faces rearward during operation. For example, when the aerodynamic brake system of FIG. 2 is used, the two systems are arranged so that their pivot axes 7 are spaced apart from each other, at the front end of resistor plate 1A and the rear end of resistor plate 1B, respectively.

[0039] The aerodynamic brake system of this embodiment further includes a sensor 16 that detects the traveling direction of the vehicle, and a signal from the sensor 16 depending on the traveling direction is sent to a decision circuit 17 that determines whether to activate the first aerodynamic brake system or the second aerodynamic brake system. As a result of the decision made by the decision circuit 17, an operating current flows to the control unit 3 (3A or 3B) that controls the aerodynamic brake system that needs to be activated.

[0040] When the aerodynamic brake system is to be activated, a diagnostic circuit 18 mounted on the vehicle detects an abnormality and determines that an emergency stop of the vehicle is necessary, and based on that determination, the aforementioned determination circuit 17 detects the direction of travel. The necessary aerodynamic brake system is then selectively activated. This series of operations may be performed automatically. Alternatively, when an emergency stop of the vehicle is performed manually, only one switch may be required to activate the aerodynamic brake system, and the aforementioned determination circuit 17 may use that switch to select the aerodynamic brake system to be activated and activate the control unit 3.

[0041] The positions of the first aerodynamic brake system 1B and the second aerodynamic brake system 1A are shown in FIG. The arrangement may be reversed, or the brake systems may be disposed on the side of the vehicle as shown in Fig. 8. Also, a plurality of each brake system may be disposed.

[0042] <Other> Although the embodiments and variations of the aerodynamic brake system according to the present disclosure have been described above, each aspect disclosed herein can be combined with any other feature disclosed herein.

[0043] Although the pyrotechnic actuator 2 and the gas generator 11 have been described as including a pyrotechnic gas generator, a so-called hybrid gas generator equipped with a gas generating agent and compressed gas may also be used. [Explanation of symbols]

[0044] 10: Vehicle 1(1A, 1B): Resistance plate 1: Aerodynamic braking system 2: Actuator (operating device) 21: Piston 22: Elastic member 23: Gas generator 3: Control unit 4: Locking claws 5: Elastic member 6:Supporting wall 7: Rotating axis 8: Stopper 9: Drive unit 11: Gas generator (actuator) 12:Protrusion 13: Wind surface 14: Wire 15: Reel

Claims

1. a resistance plate that generates air resistance against wind generated by a vehicle traveling, the resistance plate being stored in a body of the vehicle when inactive and being protruding from the body when active; a locking mechanism that locks the resistance plate in the stored state; an operating device that releases the locking mechanism and causes a portion of the resistance plate to protrude from the vehicle body; Equipped with the actuator is a pyrotechnic; a plurality of the actuating devices for causing at least a portion of the resistance plate to protrude from the vehicle body; A different actuator is actuated each time the resistance plate is displaced from the retracted state to the extended state. Aerodynamic braking system.

2. The actuator includes a piston that causes at least a portion of the resistance plate to protrude from the vehicle body.

10. The aerodynamic braking system of claim 1.

3. The actuating device causes at least a portion of the resistance plate to protrude from the vehicle body by releasing gas.

10. The aerodynamic braking system of claim 1.

4. a drive unit that displaces the resistance plate to the stored state, The locking mechanism includes a locking portion that detachably locks the engaged portion of the resistance plate.

4. An aerodynamic brake system according to any one of claims 1 to 3.

5. the resistance plate forms a part of the vehicle body in the stored state and is connected to the vehicle via a rotation axis perpendicular to the traveling direction of the vehicle; The rotation shaft is connected to a part of the resistance plate on the opposite side to the running direction.

5. An aerodynamic braking system according to any one of claims 1 to 4.

6. The resistance plate has a protruding portion that protrudes in the traveling direction of the vehicle along at least a part of the periphery of a wind-receiving surface that faces the traveling wind.

6. An aerodynamic brake system according to any one of claims 1 to 5.

7. A plurality of combinations of the resistance plate and the actuator are provided.

7. An aerodynamic braking system according to any one of claims 1 to 6.

8. A resistance plate that generates air resistance against the wind of a vehicle traveling, the resistance plate being stored inside the body of the vehicle when not in operation, and being protruding from the body when in operation; a locking mechanism that locks the resistance plate in the stored state; an operating device that releases the locking mechanism and causes a portion of the resistance plate to protrude from the vehicle body; Equipped with the actuator is a pyrotechnic; a plurality of the resistance plates connected to be displaced in unison; The actuation device causes at least a portion of any of the plurality of resistance plates to protrude from the vehicle body. Aerodynamic braking system.

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