JP2006069359A - Fuel leak arrester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a fuel from leaking from a crack on a fuel tank when a collision occurs. <P>SOLUTION: A body 70 includes a gas generator 50 for generating a given expanding gas instantly, and a fuel solidifying agent 30 for solidifying a fuel. The body 70 is placed inside the fuel tank 400, which is covered with an air bag 10 capable of absorbing impact. The fuel tank 400 is provided with a valve 20 which opens at a prescribed pressure to make the inside and outside of the fuel tank 400 communicate with each other. A G sensor 40 detecting the acceleration of the fuel tank 400 is provided, and detection of an acceleration larger than a reference value by the G sensor initiates the generation of the gas by the gas generator 50. The pressure of the generated gas forces the fuel solidifying agent 30 to jet from the body 70 to the fuel and solidify it. The gas pressure opens the valve 20 also, allowing the gas to flow out of the fuel tank 400 to expand the air bag 10, which eases impact applied to the fuel tank 400. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel leakage prevention device that prevents fuel leakage to the outside due to a crack in a fuel tank of a vehicle when the vehicle collides.

Conventionally, when a vehicle collides or the like, fuel leaks to the outside due to damage to a fuel system such as a fuel tank or a fuel pipe through which fuel passes, and an accident that causes a fire has occurred. In view of this problem, Patent Document 1 discloses a fuel supply device that opens an electromagnetic on-off valve installed in a fuel line in conjunction with the operation of an air bag at the time of a vehicle collision and leaks high-pressure fuel to lower the fuel pressure. Proposed. Thereby, even if the fuel pipeline is damaged, fuel leakage due to the high-pressure fuel can be reduced. Patent Document 2 proposes a safety fire-fighting apparatus that extinguishes fire types by injecting digestive agent into the fuel tank, seat, and liquefier through the digestive tract when the vehicle receives an impact at 30 km / h or more. Yes.
Japanese Utility Model Publication No. 7-35758 Registered Utility Model Publication No. 3016343

  As described above, the invention described in Patent Literature 1 and Patent Literature 2 can reduce fire caused by fuel leakage when a vehicle collides. However, the fuel supply device of Patent Document 1 aims to reduce fuel leakage from the fuel pipe. Therefore, if a fuel leak occurs due to a crack in the fuel tank, it may still cause a fire. Moreover, in the safety fire fighting apparatus of patent document 2, the digestive agent is injected into a fuel tank etc. through a digestive tract path. Therefore, when the digestive tract is destroyed by a collision, the effect cannot be exhibited.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a fuel leakage prevention device that can prevent fuel leakage due to a crack in a fuel tank when a collision occurs.

  The fuel leakage prevention device according to claim 1, wherein an impact detection means for detecting an impact on a fuel tank of a vehicle, and generates a predetermined gas when the impact detection means detects an impact greater than a predetermined impact force. A gas generating means for expanding the fuel and a main body portion, which is installed in the fuel tank and contains a solidifying agent for solidifying the fuel for the vehicle, and is solidified by the pressure of the gas generated by the gas generating means. And an injection means for injecting the agent from the main body into the fuel tank.

  Thereby, even if a crack occurs in the fuel tank when a collision occurs, the fuel is solidified by the solidifying agent, so that the fuel can be prevented from flowing out. Further, since the solidifying agent is provided in the fuel tank, the fuel in the fuel tank can be solidified reliably. Therefore, it is possible to reduce fire due to fuel leakage from the fuel tank.

  The fuel leakage prevention apparatus according to claim 2 is characterized in that the gas generating means is included in the main body. As described above, by installing the fuel solidifying agent and the gas generating means in the same main body, the gas generated by the gas generating means can be directly transmitted to the fuel solidifying agent and injected from the main body.

  Furthermore, in the fuel leakage prevention apparatus according to claim 3, the bag is installed so as to cover the fuel tank, and is inflated with a gas to relieve an impact from the outside, and the pressure of the generated gas is a predetermined pressure. A valve that opens when the valve reaches the above, and is provided with a valve installed at a position where the inside and outside of the fuel tank are electrically connected when the valve is opened.

  Thereby, when a collision occurs, the valve is opened by the pressure of the gas for injecting the solidifying agent, and the gas is injected outside the fuel tank. Along with this, an impact mitigating bag installed so as to cover the fuel tank is inflated. Thereby, the impact force applied to the fuel tank from the outside is relieved, and damage to the fuel tank can be reduced.

  Further, with respect to the solidifying agent for solidifying the fuel, the fuel leakage preventing apparatus according to claim 4 is characterized in that the solidifying agent is a solidified fiber material that solidifies by entangled with the fuel or a solidified fuel that gels the fuel. It is characterized by being either one of the agents. Thereby, a fuel can be solidified.

  The fuel leakage prevention device according to claim 5 is a position detection means for detecting the current location of the vehicle, a map data storage means for storing road map data having road data with at least road type information, Road type identification means for identifying the road type of the road on which the vehicle is traveling with reference to road data of the road map data corresponding to the current location of the vehicle detected by the position detection means, and the gas generation When the road type identification unit identifies that the road on which the vehicle is traveling is an expressway, the gas is discharged when the impact detection unit detects an impact greater than a predetermined impact force. It is generated. It is considered that the highway is more likely to produce a traveling speed than a general road, and that the proportion of large vehicles traveling is high. For this reason, when a collision accident occurs, the fuel tank is easily damaged and a fire is likely to occur. Therefore, the fuel leakage prevention apparatus according to claim 5 is operated only when a collision occurs in the highway.

  Furthermore, the fuel leakage prevention apparatus according to claim 6 includes traffic jam identifying means for identifying whether or not the road on which the vehicle is running corresponds to traffic jam, and the gas generating means is configured by the traffic jam identifying means. When the road on which the vehicle is traveling is identified as being congested, the gas is generated when the impact detection means detects an impact greater than a predetermined impact force. Conventionally, an accident in which a large vehicle or the like collides with the last vehicle in a traffic jam in a traffic jam section on an expressway. In this case, it is considered that it is likely to cause a major accident that causes a fire due to damage to the fuel tank. Therefore, the fuel leakage prevention apparatus according to claim 6 is operated only when a collision exceeding a predetermined impact occurs in a traffic jam section.

  The fuel leakage prevention device according to claim 7 is an inter-vehicle distance calculation means for calculating an inter-vehicle distance between the own vehicle and a rear vehicle traveling behind the own vehicle, and a speed calculation for calculating a traveling speed of the rear vehicle. And the gas generation means is configured such that after the rear vehicle approaches a predetermined distance or less and the traveling speed of the rear vehicle is calculated to be equal to or higher than the predetermined speed, the shock detection means The gas is generated when an impact exceeding a force is detected. In general, since the fuel tank is often installed at the rear of the vehicle, it is considered that the fuel tank often cracks when the host vehicle collides from the rear. Therefore, the fuel leakage prevention device according to claim 7 operates only when a collision occurs after the rear vehicle approaches the vehicle at a predetermined distance and further detects that the vehicle behind the vehicle is at a predetermined speed or more. I am doing so. That is, it does not operate in a side collision or a front collision with a low probability of causing a fuel tank crack.

(First embodiment)
The first embodiment of the present invention will be described below.

  FIG. 1 is a block diagram illustrating a configuration of a fuel leakage prevention apparatus 100 according to the present embodiment. As shown in FIG. 1, the fuel leakage prevention device 100 includes a valve 20, a fuel solidifying agent 30, a G sensor 40, a gas generator 50, a control circuit 60, a main body 70 that wraps them, and an airbag 10. Each component will be described below.

  The airbag 10 is made of nylon similar to the well-known driver airbag and passenger airbag, and can be inflated by filling the inside with a gas at the time of a collision, so that the impact applied thereto can be reduced. In this embodiment, as shown in FIG. 3, it installs beforehand so that the fuel tank 400 may be covered. And at the time of a collision, the gas which generate | occur | produced with the gas generator 50 mentioned later is injected in the airbag 10 from the valve 20, and the airbag 10 is expand | deployed. Thereby, the impact from the outside can be relieved by the airbag 10 and the impact force applied to the fuel tank 400 can be reduced. Therefore, the occurrence of cracks in the fuel tank 400 can be prevented.

  The valve 20 is a valve that opens at a predetermined atmospheric pressure or higher, and is connected to a gas generator 50 described later. This is installed in the upper part of the fuel tank 400 as shown, for example in FIG. In this embodiment, as will be described later, when the gas generated by the gas generator 50 installed in the fuel tank 400 becomes a predetermined pressure or higher, the valve 20 is opened and the gas is outside the fuel tank 400. leak. As described above, the airbag 10 covering the fuel tank 400 is deployed.

  The fuel solidifying agent 30 is a substance that solidifies the fuel by being mixed in the fuel. Specifically, as shown in FIG. 2, a fibrous substance or a fuel that is solidified by entangled with the fuel is known. The lubricant solidifying agent is used. For example, a method of solidifying a fuel using sodium carboxylate fibers (Japanese Patent No. 3005677) is used as a method of entanglement of the fuel with a fibrous substance. In the present embodiment, the fuel solidifying agent 30 is connected to a gas generator 50 described later, and a main body 70 filled with these is installed inside the fuel tank 400 as shown in FIG. When a collision occurs, a gas generated by a gas generator 50, which will be described later, fills the inside of the main body 70. When a predetermined pressure is reached, the fuel solidifying agent 30 is injected from the main body 70 into the fuel. . For example, the main body 70 may be made of a material that breaks at a predetermined pressure or higher, or the main body 70 may be provided with a valve that opens at a predetermined pressure or higher for the fuel solidifying agent 30.

  The G sensor 40 is a known acceleration sensor for detecting the acceleration applied to the fuel tank 400, and converts the acceleration signal into an electrical signal. If the acceleration value is large, it can be said that the impact force applied to the fuel tank 400 is large. In the present embodiment, when the G sensor 40 detects a signal greater than or equal to a predetermined acceleration, the airbag 10 described above is deployed or the fuel solidifying agent 30 is injected.

  The gas generator 50 is a device that generates a predetermined gas based on a signal from a control circuit 60 described later. The gas generator 50 includes, for example, an electric heater, an igniter (zirconium perchlorate potassium salt), a transfer agent (boron + sodium nitrate), similar to a gas generator (inflator) of a known driver's seat airbag system. It consists of a gas generating agent (sodium nitride). When the collision occurs, the electric heater of the gas generator 50 is heated and ignited by the igniting agent by an operation signal from the control circuit 60 described later. Thereafter, the heat of the ignition agent propagates to the gas generating agent in a short time by the transfer agent, and a large amount of nitrogen gas is generated from the gas generating agent. The air bag 10 is expanded and the fuel solidifying agent 30 is injected by the pressure of the nitrogen gas. In the present embodiment, gas is generated by a signal from the control circuit 60, but a sensor that mechanically operates the G sensor 40 at a predetermined acceleration or higher is used. 50 igniters may be ignited. Alternatively, the gas generator 50 may be filled with compressed gas in advance, and the gas may be generated by releasing the compressed gas in the event of a collision.

  The control circuit 60 is configured as a normal computer, and includes a well-known CPU, ROM, RAM, I / O, and a bus line for connecting these configurations. In the ROM, a program to be executed by the control circuit 60 is written, and a CPU or the like executes various arithmetic processes according to this program. In the present embodiment, it is determined based on the detection signal of the G sensor 40 whether or not the acceleration is equal to or higher than a reference value. When it is determined that the value is equal to or greater than the reference value, the gas generator 50 is instructed to perform a gas generation process on the assumption that an accident that causes fuel leakage in the fuel tank 400 has occurred.

  Hereinafter, processing for preventing fuel leakage when a collision occurs in the present embodiment will be described with reference to the flowchart of FIG.

  In step S11, it is determined whether or not the vehicle has collided. This is because the control circuit 60 determines whether or not the acceleration is equal to or higher than a reference value based on the detection signal of the G sensor 40. Note that this determination may be performed by using a sensor that mechanically operates the G sensor 40 at a predetermined acceleration or more. Here, when it is determined that the acceleration applied to the G sensor 40 is equal to or less than the reference value (negative determination), the following processing is not performed on the assumption that the impact does not cause a crack in the fuel tank 400. On the other hand, if it is determined that the acceleration is equal to or higher than the reference value (affirmative determination), it is determined that a large impact that causes a crack in the fuel tank 400 has been applied, and the process proceeds to step S12.

  In step S12, the gas generator 50 performs a process for generating a gas. In the gas generation process, as described above, the electric heater of the gas generator 50 is heated and ignited by the igniting agent by the operation signal from the control circuit 60. Thereafter, the heat of the ignition agent propagates to the gas generating agent in a short time by the transfer agent, and a large amount of nitrogen gas is generated from the gas generating agent. In the present embodiment, gas is generated by a signal from the control circuit 60, but a sensor that mechanically operates the G sensor 40 at a predetermined acceleration or higher is used. 50 igniters may be ignited. Alternatively, the gas generator 50 may be filled with compressed gas in advance, and the gas may be generated by releasing the compressed gas in the event of a collision.

  Thereafter, the solidifying agent 30 is injected from the main body 70 when the pressure of the gas generated in step S12 reaches a predetermined pressure. As described above, the main body 70 is made of a material that breaks when the pressure of the generated gas reaches a predetermined pressure, or a valve that opens at a predetermined pressure or higher is provided on the main body 70. A solidifying agent is mixed into the fuel to solidify the fuel. Thereby, even if the fuel tank 400 is cracked, fuel leakage to the outside can be prevented.

  On the other hand, when the pressure of the gas generated in step S12 reaches a predetermined pressure, the valve 20 installed in the upper part of the fuel tank 400 is opened. Thereafter, gas flows out of the fuel tank 400 through the opened valve 20, and the airbag 10 is deployed. Thereby, the impact from the outside with respect to the fuel tank 400 is relieved, Therefore The damage of the fuel tank 400 can be reduced.

  Thus, in this embodiment, when a collision occurs, the fuel solidifying agent 30 is injected and the airbag 10 is simultaneously deployed, so that fuel leakage due to a crack in the fuel tank 400 can be prevented.

In this embodiment, the main body 70 includes the control circuit 60 and the G sensor 40 of the fuel leakage prevention apparatus 100. However, these are provided outside the fuel tank 400 and connected to the gas generator 50 with a cable or the like. May be.
(Second Embodiment)
The second embodiment of the present invention will be described below. In the second embodiment, an accident in which a large vehicle collides with the last vehicle in a congested section on a highway has occurred in the past, and such an accident is a larger accident than an accident on a general road. This is an embodiment made in view of the tendency to become. In the present embodiment, as described later, some functions are realized by using functions provided in the navigation device 200.

  FIG. 7 is a block diagram showing the configuration of the fuel leakage prevention apparatus 100 according to the present embodiment, and the navigation apparatus 200 and the rear monitoring apparatus 300 connected thereto. As shown in the figure, the configuration of the fuel leakage prevention device is the same as that of the first embodiment. Further, as shown in the figure, the navigation device 200 and the radar 300 are connected to the control circuit 60 of the fuel leakage prevention device 100 via the in-vehicle LAN 500.

  The navigation device 200 includes a position detector that detects the current location of a vehicle (not shown), a map data input device that stores road map data, a VICS receiver that acquires traffic jam information, a display screen that displays a road map, and the like. Processing such as displaying the current location on the screen, searching for the shortest route to the destination, and performing route guidance is performed. In the present embodiment, it is determined using the position detector of the navigation device 200, the road map data, and the traffic information received by the VICS receiver to determine whether or not the road type on which the vehicle is traveling corresponds to the road type. ing.

  Here, the position detector is a device for specifying the current location of the host vehicle, and any GPS (which detects the position of the vehicle based on radio waves from known geomagnetic sensors, gyroscopes, distance sensors, and satellites). It has a GPS receiver for the Global Positioning System. Since these have errors of different properties, they are configured to be used while being complemented by a plurality of sensors. Depending on the accuracy of each sensor, the position detector may be constituted by a part of the above-described parts, and a steering rotation sensor (not shown), a vehicle speed sensor for each rolling wheel, or the like may be used.

  The road map data is composed of link data and node data. This link divides each road on the map into multiple nodes such as intersections, branches, and merge points, and defines each link as a link. By connecting each link, the road is Composed. Link data is a unique number (link ID) that identifies the link, link length indicating the link length, link start and end node coordinates (latitude / longitude), road name, road type, road width, number of lanes, right turn・ Consists of data such as the presence of the left turn lane, the number of lanes, the speed limit, etc. On the other hand, the node data includes a node ID, a node coordinate, a node name, and a link ID of a link connected to the node, each node having a unique number for each node where roads on the map intersect, merge and branch. It consists of data such as ID and intersection type.

  The road type of the road on which the vehicle is traveling is determined by first detecting the position of the vehicle by a position detector, and overlaying the current location on the road map data to determine which road the vehicle is traveling on. It is determined whether it is. Since the road type information is attached to the link data corresponding to the road as described above, the road type is determined based on this information. In this embodiment, when the road on which the vehicle is traveling is a road other than the highway, the fuel leakage prevention device 100 is not operated as will be described later.

  The VICS receiver is a device that receives information on road traffic information distributed from a VICS (Vehicle Information and Communication System) (registered trademark) center via beacons laid on the road or FM broadcast stations in various places. is there. This road traffic information includes, for example, traffic jam information composed of traffic jam sections, traffic jam levels, travel time (time required) of traffic jam sections, types of traffic jams (lane restrictions, traffic accidents, etc.), traffic closures due to accidents and construction, This is regulatory information on the closing of entrances and exits on highways. Note that the degree of congestion is expressed in a plurality of evaluation stages (for example, congestion, congestion, empty space, etc.).

  The method of determining whether or not the road on which the vehicle is running corresponds to a traffic jam is as follows. First, the position of the vehicle is detected by a position detector, and the current location is overlaid on the road map data. Determine if you are driving on the road. And it is discriminate | determined with reference to the traffic information received with a VICS receiver whether the road where the own vehicle is running corresponds to traffic congestion. In the present embodiment, when the road on which the vehicle is traveling does not correspond to a traffic jam, the fuel leakage prevention device 100 is not operated as will be described later.

  The radar 300 is mounted in the vicinity of the rear portion of the vehicle, and for example, a millimeter wave radar using a radio wave such as a millimeter wave is employed. A laser radar using laser light may be employed. The radar 300 irradiates a transmission wave from an antenna (not shown) toward the rear of the vehicle, detects the reflected wave with the antenna, and detects the vehicle behind the vehicle based on the detected reflected wave. The radar 300 calculates the detected distance between the rear vehicle and the host vehicle and the relative speed between the host vehicle and the rear vehicle, and transmits this information to the control circuit 60 of the fuel leakage prevention apparatus 100. In the present embodiment, the fuel leakage prevention device 100 is not operated unless it is detected that the rear vehicle has approached the vehicle at a predetermined speed at a predetermined speed or higher.

  FIG. 8 shows the arrangement of the main body 70, the navigation device 200, and the radar of the fuel leakage prevention device 100 in this embodiment. As shown in the figure, the main body 70 is installed in the upper part of the fuel tank 400 as in the first embodiment. In addition, the fuel leakage prevention device 100 is connected to the navigation device 200 and the radar 300 via an in-vehicle LAN.

  Hereinafter, the process of permitting the operation of the fuel leakage preventing apparatus 100 in the present embodiment will be described with reference to the flowchart of FIG.

  In step S101, it is determined whether or not the road on which the vehicle is traveling corresponds to an expressway. As described above, this is performed based on road map data to which information such as a position detector that detects the current location of the vehicle included in the navigation device 200 and the road type is attached. Here, when it is determined that the vehicle does not correspond to the expressway (negative determination), the operation of the fuel leakage prevention device 100 is prohibited as described later. On the other hand, when it determines with falling into an expressway (affirmation determination), a process is advanced to step S102.

  In step S102, it is determined whether or not the road on which the vehicle is traveling corresponds to a congested road. As described above, this is performed based on the VICS traffic jam information received by the VICS receiver provided in the navigation device 200. For example, when “congestion XX km” of the VICS traffic information corresponds to a traffic congestion degree equal to or higher than a predetermined standard, it is determined that the traffic is a traffic jam. In addition, the vehicle speed and the moving distance for the past several minutes may be taken into consideration in the determination using a vehicle speed sensor or the like provided in the vehicle. Here, when it is determined that the traffic does not correspond to a traffic jam (negative determination), the operation of the fuel leakage prevention apparatus 100 is prohibited as will be described later. On the other hand, when it is determined that it corresponds to a traffic jam (positive determination), the process proceeds to step S103.

  In step S103, the radar 300 is operated to monitor the rear. As described above, this is performed by irradiating a transmission wave backward from an antenna provided in the radar 300 and detecting the reflected wave with the antenna. In step S104, the radar 300 analyzes the reflected wave, and calculates the inter-vehicle distance from the rear vehicle and the relative speed with the own vehicle. Thereafter, these pieces of information are transmitted to the control circuit 60 of the fuel leakage prevention apparatus 100.

  In step S105, the control circuit 60 determines whether or not the distance between the vehicle behind and the relative speed information sent from the radar 300 has reached a reference value indicating a high probability of collision. Here, as a reference value (reference inter-vehicle distance, reference relative speed) indicating that the probability of collision is high, for example, assuming that the rear vehicle is a large vehicle, the collision does not occur even if the large vehicle brakes. Set inevitable reference values (reference inter-vehicle distance, reference relative speed). Here, when the inter-vehicle distance with the rear vehicle and the relative speed with the rear vehicle are less than the reference value (negative determination), the operation of the fuel leakage prevention device 100 is prohibited as described later, assuming that there is no possibility of a collision. To do. On the other hand, when the reference value is reached (affirmative determination), it is determined that there is a high possibility of a collision, and in step S106, a flag that enables the operation of the fuel leakage prevention device is set. Thereafter, when a collision actually occurs, the processing shown in FIG. 6 is performed.

  Hereinafter, processing for preventing fuel leakage when the collision shown in FIG. 6 occurs will be described. Each process shown in the figure is the same as the process of the first embodiment (FIG. 4) except for step S22.

  First, in step S21, it is determined whether or not a collision has occurred as in the process of the first embodiment. Here, when the collision does not occur (negative determination), the following processing is not performed. On the other hand, if a collision has occurred (positive determination), the process proceeds to step S22.

  In step S22, it is determined whether or not a flag for enabling the operation of the fuel leakage prevention device is set (whether or not the processing in step S106 in FIG. 5 has been performed). Here, when this flag is not set (negative determination), the processing for preventing fuel leakage is not performed. On the other hand, when this flag is set (affirmative determination), the gas generating apparatus 50 generates a gas in step S23. Since this process is the same as in the first embodiment, a description thereof will be omitted. After that, as in the first embodiment, the fuel solidifying agent 30 is injected into the fuel and the airbag 10 is deployed, thereby preventing fuel leakage.

  As described above, in the present embodiment, when the own vehicle travels on the highway and falls into a traffic jam, after detecting that the rear vehicle is approaching at an inter-vehicle distance greater than the reference value, relative speed, Only when a collision actually occurs, a process for preventing fuel leakage is performed. This is because an accident in such a situation has been seen to develop into a major accident that would cause a fire due to fuel leakage, and this is an embodiment intended to prevent this. Therefore, for example, even if a side collision or a frontal collision occurs, the fuel leakage prevention device 100 does not operate.

  If the radar 300 is not installed, a flag indicating that the fuel leakage prevention device is permitted to operate when the navigation device 200 determines that the vehicle is traveling on a highway and a congested road (steps S101 and S102). You may stand up.

It is a block diagram which shows the structure of the fuel leak prevention apparatus 100 in 1st Embodiment. It is an image figure which shows the condition which entangles fuel with a fibrous substance. It is a figure for demonstrating arrangement | positioning of the main body 70 and the airbag 10 of the fuel leak prevention apparatus 100 in 1st Embodiment. It is a flowchart which shows the process which prevents a fuel leak when the collision in 1st Embodiment generate | occur | produces. It is a flowchart which shows the process which permits operation | movement of the fuel leak prevention apparatus in 2nd Embodiment. It is a flowchart which shows the process which prevents a fuel leak when the collision in 2nd Embodiment generate | occur | produces. It is a block diagram which shows the structure of the fuel leak prevention apparatus 100 in 2nd Embodiment, the navigation apparatus 200 connected with this, and the radar 300. FIG. It is a figure for demonstrating arrangement | positioning of the main body 70 and the airbag 10 of the fuel leak prevention apparatus 100 in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Fuel leak prevention apparatus 10 Air bag 20 Valve 30 Fuel solidifying agent 40 G sensor 50 Gas generator 60 Control circuit 70 Main body 200 Navigation apparatus 300 Radar 400 Fuel tank 500 Car interior LAN

Claims (7)

An impact detection means for detecting an impact on the fuel tank of the vehicle;
A gas generating means for generating and expanding a predetermined gas when the impact detecting means detects an impact of a predetermined impact force or more;
A main body part, which is installed in the fuel tank and includes a solidifying agent for solidifying the fuel for the vehicle, is supplied from the main body part to the fuel tank by the pressure of the gas generated by the gas generating means. A fuel leakage prevention device comprising: an injection means for injecting the fuel into the inside.   The fuel leakage prevention device according to claim 1, wherein the gas generation unit is included in the main body. An impact mitigating bag installed so as to cover the fuel tank and inflating with a gas to mitigate an external impact;
A valve that is opened when the pressure of the generated gas reaches a predetermined pressure or more, and is provided at a position where the inside and outside of the fuel tank are electrically connected when the valve is opened. The fuel leakage prevention device according to claim 1 or 2, wherein   The fuel according to any one of claims 1 to 3, wherein the solidifying agent is one of a fibrous substance that solidifies by entangled with the fuel or a solidifying agent that gels the fuel. Leakage prevention device. Position detection means for detecting the current location of the vehicle;
Map data storage means for storing road map data having road data with at least road type information;
Road type identification means for identifying the road type of the road on which the vehicle is traveling with reference to the road data of the road map data corresponding to the current location of the vehicle detected by the position detection means,
The gas generating means, when the road on which the vehicle is traveling is identified as a highway by the road type identifying means, when the impact detecting means detects an impact greater than a predetermined impact force, The fuel leakage prevention device according to claim 1, wherein the gas is generated. Congestion identifying means for identifying whether the road on which the vehicle is running corresponds to a traffic jam or not,
The gas generating means detects the gas when the impact detecting means detects an impact of a predetermined impact force or more when the road on which the vehicle is traveling is identified as a traffic jam by the traffic jam identifying means. The fuel leakage prevention device according to claim 1, wherein the fuel leakage prevention device is generated. An inter-vehicle distance calculating means for calculating an inter-vehicle distance between the host vehicle and a rear vehicle traveling behind the host vehicle;
Speed calculating means for calculating the speed of the rear vehicle,
The gas generating means is configured such that after the rear vehicle approaches a predetermined distance or less and the traveling speed of the rear vehicle is calculated to be equal to or higher than a predetermined speed, the shock detection means applies an impact equal to or higher than a predetermined impact force. The fuel leakage prevention device according to any one of claims 1 to 6, wherein the gas is generated when detected.

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