KR19990004458U - Fuel tank ignition prevention device of car. - Google Patents

Abstract

The present invention relates to a fuel tank ignition prevention device for an automobile, and to provide a fuel device for an automobile that can automatically cut off fuel supply at the same time as a vehicle crash accident. The fuel tank ignition prevention device includes a fuel tank for storing fuel, a fuel supply / blocking valve connected to the fuel tank and supplying or blocking the fuel to the carburetor side, and installed before and after the vehicle and detecting a pressure change of the vehicle. And a collision sensor for outputting a signal accordingly. And a latch circuit for receiving a signal from the collision sensor and generating a relay driving signal, and a relay for blocking a voltage path from a battery to the fuel supply / shut valve in response to the relay driving signal.

Description

Fuel tank ignition prevention device of car.

The present invention relates to a fuel tank ignition prevention device of an automobile, and more particularly to a fuel tank ignition prevention apparatus of a vehicle that can automatically cut off the fuel supply in the event of a collision of a vehicle using LPG fuel.

Typically, most of the car accidents are caused by collisions of vehicles, and even minor collisions often cause fuel tanks to ignite, resulting in car damage or injury that far exceeds the damage that can be caused by a collision. . In particular, taxis using highly flammable and explosive LPG fuel will cause more serious accidents.

In order to solve this problem, conventionally, after installing a fuel cutoff switch in a driver's seat of a taxi, the driver cuts the LPG fuel by switching the fuel cutoff switch as needed (when the vehicle crashes). In addition, an overflow valve was installed in the fuel tank of the cab to prevent the LPG fuel from leaking by automatically locking the fuel tank when the pressure of the pipe through which LPG fuel flows was changed significantly or the pipe was damaged in the event of a vehicle accident. When the engine was turned off, the oil pressure switch was activated to automatically shut off LPG fuel at both controls.

However, the fuel cutoff switch becomes useless when the driver's or passenger's consciousness is unclear at the same time as the collision of the vehicle, and the fuel tank is ignited. In addition, if the overflow valve is not damaged enough to operate the overflow valve or there is a problem in the control module of the oil pressure switch without any abnormality in the cab, LPG fuel that has not reacted inside the engine is ejected as it is. . Therefore, LPG fuel is continuously ejected, and accordingly, there is a problem of causing a large explosion in the surrounding small firearms.

Accordingly, an object of the present invention is to provide a fuel tank ignition prevention device for a vehicle that can automatically cut off fuel supply at the same time as a vehicle crash.

Another object of the present invention is to provide a vehicle that can prevent the fuel tank from firing in the event of a vehicle crash.

In order to achieve the above object, an automotive fuel tank ignition prevention device of the present invention includes a fuel tank for storing fuel, a fuel supply / blocking valve connected to the fuel tank and supplying or blocking the fuel to a vaporizer side, and And a collision sensor installed before and after and detecting a change in pressure of the vehicle and outputting a signal accordingly. And a latch circuit for receiving a signal from the collision sensor and generating a relay driving signal, and a relay for blocking a voltage path from a battery to the fuel supply / shutoff valve in response to the relay driving signal.

1 is a side view of a vehicle showing the installation position of the collision sensor according to an embodiment of the present invention.

Figure 2 is a circuit diagram showing the internal configuration of the fuel tank ignition prevention device of the vehicle according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if a detailed description of related known functions or configurations may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a side view of a vehicle showing an installation position of a collision sensor according to an embodiment of the present invention. Figure 2 is a circuit diagram showing the internal configuration of the fuel tank ignition prevention device of the vehicle according to an embodiment of the present invention.

In the fuel tank ignition prevention apparatus of the vehicle according to an embodiment of the present invention, as shown in Figure 1 and 2, the collision of the vehicle to easily detect the collision of the vehicle since the collision with the vehicle before and after occupies most of the In order to achieve this, the collision sensor 30 is installed on the nose and tail of the vehicle 100, in particular above and behind the front bumper. In this case, the collision sensor 30 is electrically connected to the latch circuit 28 to apply the pressure change of the vehicle 100 to the latch circuit 28 in the form of an electric signal or a signal according to opening and closing of the switch.

The latch circuit 28 receives a power supply voltage from the battery 40 and generates a relay driving signal in response to the signal of the collision sensor 30. The latch circuit 28 supplies the voltage of the battery 40 to the fuel supply / shutoff valve 14 according to the switching of the ignition switch 32. The relay 20 supplies the voltage supplied from the battery 40 to the fuel supply / blocking valve 14 and blocks the voltage path from the battery 40 to the fuel supply / blocking valve 14 in response to the relay driving signal input from the latch circuit 28. . In this case, the relay 20 includes a coil 24 and a relay switch 22. That is, the coil 24 generates a predetermined electromagnetic force by the relay driving signal input from the latch circuit 28. The relay switch 22 cuts off the power supply voltage of the battery 40 while being switched by the electromagnetic force generated by the coil 24.

The fuel supply / shutoff valve 14 shuts off the fuel supplied to the carburetor 12 by the switching operation of the fuel cutoff switch 26 which the driver manually selects in the event of a collision and the relay 20 which operates automatically in the event of a collision. An overflow valve 16 is installed in the fuel tank 18 and prevents fuel (LPG fuel) from flowing out due to breakage of the piping and the connection of the fuel.

An operation process of the fuel tank ignition prevention device of the vehicle configured as described above will be described in detail with reference to the circuit diagram of FIG. 2.

When the pressure change of the vehicle occurs in the rose or tail of the vehicle 100, the collision sensor 30 generates a high signal. The latch circuit 28 receives the high signal input from the collision sensor 30 and generates a high level relay driving signal. At this time, if the collision sensor 30 is not detected, the latch circuit 28 goes low and does not generate a relay driving signal. Thereafter, the coil 24 of the relay 20 receives the relay driving signal from the latch circuit 28 to generate an electromagnetic force. The relay switch 22 is then switched by the electromagnetic force generated by the coil 24. Thereafter, the voltage path from the battery 40 to the fuel supply / exit valve 14 is shut off by driving the relay 20, so that the fuel supply / exit valve 14 is closed. As a result, the fuel supplied to the carburetor 12 (LPG fuel) is automatically shut off, thereby preventing a large explosion accident due to ignition.

At this time, when the ignition switch 32 is switched off, that is, the power supply of the vehicle is removed after the ignition switch 32 is switched off, the output of the latch circuit is cleared so that the latch circuit 28 returns from the battery 40 to the fuel supply / shutoff valve 14 so as to be required for normal driving. Connect the voltage path. Accordingly, the fuel supply / shutoff valve 14 is opened so that the fuel stored in the fuel tank 18 is supplied to the vaporizer 12 side.

As described above, the fuel tank ignition prevention device of the vehicle according to the embodiment of the present invention can automatically cut off fuel supplied to the carburetor from the fuel tank at the same time as the collision of the vehicle unconscious state of the driver or control device in case of an accident In case of abnormality, the fuel supply is cut off to prevent a large explosion and minimize the damage to life.

Claims (3)

In a fuel device of an automobile having a fuel tank for storing fuel and a fuel supply / shutoff valve connected to the fuel tank and supplying or blocking the fuel to the carburetor side, And a collision sensor installed before and after the vehicle and detecting a pressure change of the vehicle and outputting a signal accordingly. A latch circuit for receiving a signal from the collision sensor and generating a relay driving signal; And a relay for disconnecting a voltage path from a battery to the fuel supply / shutoff valve in response to the relay drive signal. The fuel tank ignition prevention apparatus of claim 1, wherein the latch circuit outputs a high level relay driving signal to the relay in response to a signal from the collision sensor to block a voltage path of the battery. . The fuel tank ignition of an automobile according to claim 1 or 2, wherein the latch circuit generates a low-level relay driving signal according to the switching of the ignition switch to supply the voltage of the battery to the fuel supply / shutoff valve side. Prevention device.