JPS609065Y2 - Fuel leak prevention device - Google Patents

Description

[Detailed description of the invention] The present invention prevents fuel from leaking from the fuel injection pipe due to a collision, thereby preventing secondary disasters such as fire.
It's something new.

Since a fuel tank built into a passenger car is generally suspended below a rear floor panel, a fuel injection pipe for injecting fuel into the fuel tank from the outside is attached to the fuel tank.

In many conventional fuel injection pipes, the base end is directly fixed to the fuel tank by brazing, but if the fuel injection pipe moves due to a collision or the like, the cap attached to the tip may be attached to the outer skin of the vehicle. There was a risk that it would get caught and come off, causing fuel to leak and cause a fire.

In recent years, safety standards for automobiles have become increasingly strict, and new safety standards are being considered to ensure that fuel does not leak even in a collision at speeds of about 50 km/h.

Due to this social background, it was necessary to develop a highly safe fuel leakage prevention device that would prevent the lid from getting caught on the outer skin of the car body and come off even if the fuel injection pipe moves with the fuel tank for some reason. desired.

In response to such demands, the present invention aims to provide a device that eliminates the risk of the fuel injection pipe cover getting caught on the outer skin of the vehicle body and prevents fuel from leaking from there, thereby preventing collisions. This is designed to make it more difficult for fire accidents to occur.

The structure of the fuel leakage prevention device of the present invention, which is distantly related to this purpose, is that the lower end is connected to the fuel tank and the upper end is placed on the side of the fuel injection pipe opposite to the fuel supply port formed in the outer panel of the vehicle body. a movement guide member provided with an inclined portion that guides the fuel injection pipe, which moves together with the fuel tank, into a space inside the vehicle body due to the impact of the fuel injection port, and prevents the upper end of the fuel injection pipe from interfering with the fuel supply port; It is characterized by

Hereinafter, an embodiment in which the fuel leakage prevention device of the present invention is applied to a 7-sided back type passenger car will be described in detail with reference to FIGS. 1 to 3. As shown in FIG. 1, a fuel tank 11 is suspended below the rear floor panel (not shown), and as shown in FIG. The lower end of the fuel injection pipe 14, the upper end of which opens into the fuel supply port 13 formed in the fuel supply port 12, communicates with the inside of the fuel tank 11 by brazing.

As shown in FIG. 3, which shows the planar shape of FIG.
A bracket 19 for fixedly supporting a movement guide member 18 is welded to the vehicle body plate 15 via a bolt 16 and a nut 17.

The movement guide member 18, which is formed with an inclined part 21 that can come into contact with the vertical part 20 of the fuel injection pipe 14, moves the fuel injection pipe 14, which is integrated with the fuel tank 11 that moves forward due to inertia in the event of a collision, to the inside of the vehicle body. It is designed to prevent the lid 22 attached to the upper end of the fuel injection pipe 14 from getting caught in the fuel supply port 13 by drawing it into the space.

As described above, in this embodiment, the movement guide member 18 is fixed to the vehicle body side, but it is also possible to attach it to the fuel injection pipe 14 conversely.

Therefore, when the fuel tank 11 and the fuel injection pipe 14 start to move leftward in FIG. Since the cover 22 is drawn into the inside of the vehicle body as shown by the dashed line, there is no risk that the cover 22 will hit the fuel supply port 13 and come off.

In other words, there is almost no risk of fuel leaking from the upper end of the fuel injection pipe 14 and causing a fire accident.

In this case, the brazing at the lower end of the fuel injection pipe 14 tends to deform (bend) around the lower end, and there is a risk that the brazing may break or crack and fuel may leak from there. be.

From this point of view, as shown in FIG. 4 showing the external appearance of another embodiment of the present invention, the fuel tank 11 and the fuel injection pipe 14 are not directly connected in a fixed state by brazing or the like. It is preferable to connect these using a bracket 23 via a highly flexible elastic material 24 such as a metal bellows or an oil-resistant rubber hose.

According to the fuel leakage prevention device of the present invention, a movement guide member for regulating the moving direction of the fuel injection pipe is provided between the vehicle body outer plate and the fuel injection pipe, and the lid of the fuel injection pipe is attached to the vehicle body outer plate. There is no possibility that the fuel will hit the formed fuel supply port and come off, and it is possible to prevent a fire accident due to fuel leakage.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram showing a schematic state of an embodiment in which the fuel leakage prevention device according to the present invention is applied to a notchback type passenger car, Fig. 2 is an external view of the section viewed from the arrow ■, and Fig. 3 is a plan view thereof. FIG. 4 is an external view of another embodiment of the present invention, and in the figure, 11 is a fuel tank, 12 is a car body outer plate, 13 is a fuel supply port, 14 is a fuel injection pipe, and 18 is a movement guide. The members include a bracket 19, a vertical portion 20 of the fuel injection pipe, an inclined portion 21 of the movement guide member, and a lid 22 of the fuel injection pipe.

Claims (1)

[Scope of utility model registration request] The fuel injection pipe, which moves together with the fuel tank due to the impact of a collision, is installed inside the vehicle body on the side of the fuel injection pipe whose lower end is connected to the fuel tank and whose upper end faces a fuel supply port formed in the outer skin of the vehicle body. 1. A fuel leak prevention device comprising a movement guide member having an inclined portion that guides the fuel injection pipe into the space and prevents the upper end of the fuel injection pipe from interfering with the fuel supply port.