SU1703518A1 - System for prevention of conflagration of fuel tank in trunk of vehicle - Google Patents

Abstract

This invention relates to a vehicle fire extinguishing system. The aim of the invention is to prevent and contain a fire in a fuel tank and luggage compartment. The fuel tank fire prevention system contains a tank 1 with a fire extinguishing agent in which a pyrotechnic chain and an explosive charge are mounted. The tank 1 is connected to the fuel tank 4 and the luggage compartment 5 with pipes b and 7 with diffusers 8 and 9 at the ends. The luggage compartment 5 is separated from the passenger compartment by a fireproof partition 10. And the electrical circuit 13 of the fuel level sensor in the fuel tank 4 is equipped with a switch 15 located on the shield 16 of the instruments. 2 Il.

Description

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The invention relates to vehicle fire extinguishing systems and can be used on sports cars.

Fire extinguishing systems for vehicles are known, which contain a tank with a fire extinguishing agent, a device that ensures the ejection of a fire extinguishing agent in the event of a fire, and elements that scatter this substance in space.

This system is not able to effectively localize the spreading fire in the vehicle.

The closest in technical essence and the achieved result to the proposed system is an automatic fire extinguisher containing a tank with an extinguishing agent, explosive charge, a pyrotechnic chain.

This system is simpler in design and more reliable, but it is not able to completely localize the fire in the event of a fuel tank fire.

The purpose of the invention is to prevent and contain a fire in the fuel tank and luggage compartment.

This goal is achieved by the fact that in the system containing a tank with a fire extinguishing agent, explosive charge, a pyrotechnical chain, pipes with diffusers at the ends are used to supply the fire extinguishing agent to the baggage compartment and the fuel tank cavity. the tank is switched on forcibly, the reservoir with the fire extinguishing substance located in the luggage compartment, the lid of which is provided with locks preventing its opening in the event of an accident, and the electrical wiring is removed on of the luggage compartment, separated from the passenger compartment fireproof peregorrd- Coy.

Fig. 1 is a schematic diagram of the system; figure 2 - the location of the system in the car.

The fuel tank fire prevention system in the baggage compartment contains a tank 1 with fire extinguishing agent, in which a pyrotechnic chain 2 and a blast 3 are mounted, the tank 1 is connected to the fuel tank 4 and the baggage compartment 5 by means of pipelines b and 7 with diffusers 8 and 9 at the ends. The luggage compartment 5 is separated from the passenger compartment by a fireproof partition 10 and is closed by a lid 11, locked with locks 12, which prevent the luggage compartment 5 from opening in the event of an accident. To prevent the fuel that has been spilled from igniting from closing or sparking the electrical circuit, the electrical wiring is removed from the luggage compartment 5. And the electrical circuit 13 of the fuel sensor 14 in the fuel tank 4, if necessary, is turned on by means of the switch 15 on the instrument panel 16 and is de-energized under normal conditions.

The system works as follows.

Ignition of fuel can occur for the following reasons: a strong blow to the area of the fuel tank; the sparking of the metal case of the tank and the car upon impact; creating for some reason overpressure in the cavity of the tank (failure of the pressure valves and drainage device); spilling of a damaged fuel tank and its contact with the engine exhaust tract or with closed wiring located in the luggage compartment, as well as the electrical circuit of the fuel level sensor; hit by a fire source from the outside. In all cases of an accident, the lid 11 of the luggage compartment must be tightly closed with locks 12. As this helps to localize the fire and improves the efficiency of the system, which complies with the rules for operating sports cars.

In all cases of ignition of the fuel tank, the flame interacts with the pyrotechnic chain 2, which triggers an explosive charge 3, which opens the flow of fire-extinguishing substance from the tank 1 through pipelines 6 and 7 through diffusers 8 and 9 into the luggage compartment space 5 and the fuel cavity tank 4, which leads to extinguishing the fire. The source of ignition in the luggage compartment, in order to prevent the spread of fire into the passenger compartment, penetration of burned gases from burning and thus saving the lives of passengers, is separated from the passenger compartment by a fireproof partition 10.

In order that the electric circuit 13 of the fuel level sensor 14 in the fuel tank 4 does not become a source of ignition of the spilled fuel, the current from it is constantly disconnected. The circuit can be switched on if the driver determines the fuel level by turning on the switch 15 on the instrument panel 16.

Thus, the proposed system allows to provide highly efficient fire extinguishing, localization and prevention of spread.

Claims (1)

Invention Formula A fuel tank fire prevention system in the luggage compartment of a vehicle, comprising a tank with an extinguishing agent, an explosive charge for ejecting the fire extinguishing mixture, and a pyrotechnic chain leading to an explosive charge triggered by the action of fire, locale12. ten t The fire tank and luggage compartment fires, the tank is located in the luggage compartment, separated from the passenger compartment by a fireproof partition, and equipped with pipelines with receivers at the ends installed in the luggage compartment and the cavity of the fuel tank. 12 ft figure 1