JPS6155361A - Fuel tank - Google Patents

Abstract

PURPOSE:To enable the liquid level of fuel deviated during rapid turn to be ensured in a high level, by a method wherein a working hole is machined in the upper surface of a tank body, and a swirl tank, inserted through the working hole to place it to the bottom part of the tank body, is blocked throughout the whole surface, is installed. CONSTITUTION:A chamber 9 of a swirl tank 5 is formed in a block state throughout the whole surface. The swirl tank 5 is formed integrally with an outlet tube 13, a fuel introducing pipe 37, and a fuel pump 25, and is mounted integrally to a cover 27. The cover 27 is inserted through a working hole 7, bored in the upper surface of a tank body 3, to place it on the bottom of the tank body, and the cover 27 is secured to the tank body 3. Fuel is introduced in the swirl tank 5 through a fuel introducing pipe 37. If rapid turn is made when te is less fuel, the fuel in the swirl tank 5 is prevented from escaping to the outside, the surfaces (a) and (b) of liquid are ensured in a high level in the chamber 9, and thereby, a suction port 23 is prevented from being exposed.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a fuel tank.

[Prior art] In general, when making a sharp turn when the fuel in the fuel tank is low, or when parking on an incline such as on a slope, the fuel may shift in the tank, and depending on the direction in which the fuel is shifted, the suction port may close. There were problems with the engine being exposed, making it difficult to start, and causing suffocation and engine stalling. In order to solve this problem, a swirl tank is installed in the tank to minimize the deviation of the fuel, and the fuel is sucked from the swirl tank. The swirl tank 101 is, for example, welded and fixed to the bottom surface of the tank body 103 as shown in FIG. 4.

The upper part of the swirl tank 1°01 is open, and the circumferential wall of the swirl tank 101 is provided with a fuel intake window 107 and a water drain hole 109 that communicate with the inside of the tank body 103. As a result, when making a sharp left turn when fuel is low, a liquid level a shown by the chain line is ensured in the turning tank 101, and when making a sharp right turn, the liquid level a shown by the chain line is secured by the partition wall 111 provided in the turning MJ10.1. The liquid level shown is ensured.

On the other hand, an outlet tube 115 whose suction port 113 faces the filter F in the swirl tank 101 communicates a fuel pump 117 with an engine (not shown). Further, one end of the vapor removing vibrator 119 faces the filter F in the swirl tank 101, and the other end is open to the upper part of the tank body 103.

In addition, similar examples of fuel tanks with this type of structure include:
For example, there is Japanese Utility Model Application Publication No. 56-117049.

[Problems to be Solved by the Invention] The swirling tank 101 of the fuel tank 121 described above secures the liquid level at a higher position without causing the fuel to go outside during sharp turns, and performs stable suction. It is desirable to have a large shape and volume.

However, when the tank body 103 is integrally molded by blow molding, the swirling tank 101 cannot be fixed to the tank body 103 in advance and must be inserted through the working hole 105. In addition to having to make a large working hole 105, a large working hole 125 is also required on the floor panel 123 side, which causes problems in terms of strength, such as a reduction in surface rigidity.

Therefore, if the turning angle 4!101 is made smaller due to the decrease in surface rigidity, the working holes 105 and 125 will become smaller, but on the other hand, the number of fuel canisters to be secured during sharp turns will be reduced.

In addition, when parking on an incline such as on a slope, the tank body 103
Depending on the direction of inclination of the swirl tank 101, the fuel in the swirl tank 101 may escape from the drain hole 109 into the tank body 103.
There was a problem that caused problems in securing fuel for the 01.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fuel tank that can make the opening of the working hole small and that can secure fuel when making sharp turns or when parking on an incline such as on a slope.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a tank body in which a working hole is formed on the upper surface and the working hole is closed with a lid, and a tank body that is inserted through the working hole. a swirl tank placed on the bottom of the tank body and closed on the entire surface; an outlet tube coupled to the swirl tank and communicated with the bottom of the swirl tank; one end coupled to the outlet tube coupling side of the swirl tank; a fuel introduction vibrator connected to the bottom of the tank body and having the other end opened near the bottom of the tank body on the side opposite to the outlet tube connection side;
A vapor removing vibrator is provided, one end of which is opened at the top of the swirling tank, and the other end of which is opened at the top of the tank body. In a preferred embodiment, a filter is built in the swirl tank, an outlet tube is communicated with the filter, a fuel pump is connected to the eye tread tube in the tank body, and the fuel pump is connected to the lid. is supported through a bracket.

Further, one end of the vapor removing vibrator is opened in the filter, and a through hole is bored in a portion corresponding to the upper part of the swirling tank, and the other end is fixed to a bracket.

[Operation] In this configuration, fuel flows into the chamber of the swirl tank via the fuel introduction pipe.

In addition, when parking on an incline such as a slope, the fuel stays in the turning tank, and when making a sharp turn, the fuel in the turning tank will not escape to the outside even if it shifts to the outside. The liquid level is secured at a high position. Therefore, it is possible to downsize the rotating tank. Further, the vapor generated in the swirling tank is guided and discharged to the outside via a vapor removing vibrator.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 3.

In the figure, reference numeral 1 indicates a fuel tank disposed below a floor panel 50, and a swirling tank 5 is mounted and set on the bottom of the tank body 3 via a pan parabar 52.

The entire surface of the chamber 9 of the rotating 4F't 5 is formed in a closed state. A vapor removal vibrator 11 and an arrator tube 13 are respectively connected to the swirling tank 5. One end of the vapor removal vibe 11 is opened into a fuel filter 15 provided at the bottom of the chamber 5, and the other end is connected to a tank. It opens at the top of the main body 3. A through hole 17 is bored in the vapor removing vibe 11a at a portion corresponding to the upper part of the chamber 5. The other end of the vapor removing vibrator is fixed by welding to two brackets which will be described later.

On the other hand, a suction port 23 of the outlet duplex 13 opens into the fuel filter 15, and the other end communicates with an engine (not shown) via a fuel pump 25.

As shown in FIG. 3, the fuel pump 25 is fixed to the ff 127 that closes the working hole 7, and is assembled to the brackets 1 to 29 via anti-vibration rubber 54. It is a unit that detachably engages with the joint portion 33 of the outlet tube 13 protruding from the tank 5.

On the other hand, a fuel introduction vibe 37 is connected to the lower circumferential wall of the swirl tank 5 on the side where the chamber 9 and the outlet tube 13 are connected.

The fuel introduction vibe 37 protrudes from the peripheral wall and is inverted 3
7a, which is arranged along the circumferential wall of the rotating tank 5.
Three are set on the side opposite to the inversion 37a portion, that is, on the side opposite to the connection side of the outlet tube 13, and near the bottom of the tank body 3.

As is clear from the above explanation, the swirling tank 5 includes the outlet tube 13, the fuel introduction vibrator 37, and the fuel pump 25.
The lid 27 is integrally assembled as a unit, inserted through the working hole 7 formed on the top surface of the tank body 3, placed on the bottom of the tank body, and the lid 27 is fixed to the tank body 3. , it will be firmly set.

In the fuel tank 1 configured in this way, the swirl tank 5
Fuel is introduced into the interior via a fuel introduction vibrator 37. Next, when the vehicle is low on fuel, for example, if the vehicle makes a sharp turn, the fuel will shift depending on the direction of the turn.

At this time, the fuel in the swirl tank 5 does not escape to the outside and the liquid level a-b is maintained at a high position in the chamber 9, so that the suction port 23 is not exposed.

Therefore, even if the volume of the turning tank 5 is reduced, it is possible to secure fuel during sharp turns. You will be able to insert it. In addition, even if the tank body 3 is tilted in any direction when parking on an incline such as a slope, the fuel introduction vibrator 37 can be reversed 3.
The fuel is secured in the chamber 9 by the portion 7a, and the suction port 23 is not exposed.

In addition, the vapor pressure generated in the chamber 9 is guided and discharged into the internal space of the tank body 3 by the vapor removing vibrator 11, so that it does not adversely affect the engine.

[Effects of the Invention] As explained above, according to the present invention, since the chamber of the swirling tank is closed, the liquid level of the fuel, which tends to shift during sharp turns, can be maintained at a high position, so that the swirling tank can be made smaller. This makes it possible to make the working hole smaller. As a result, the strength of the tank body can be increased.

In addition, it is possible to prevent the engine from stalling if the engine stalls when taking a sharp turn, and it also prevents the engine from starting on slopes or other slopes. In addition, since the vapor in the chamber can be quickly guided and discharged outside, engine troubles due to vapor will not occur.

[Brief explanation of drawings]

Fig. 1 is a cutaway sectional view showing the swirling tank of the fuel tank of the present invention, Fig. 2 is a partially cutaway perspective view of the main parts, Fig. 3 is an exploded perspective view of Fig. 1, and Fig. 4 is a conventional example. FIG. 5 is a perspective view of the same rotating structure as shown in FIG.
Rotating tank 7... Working hole 9... Chamber
11... Vapor removal pipe 13... Outlet tube 17... Through hole 37... Fuel introduction pipe 39
...Intake port of fuel introduction pipe゛・cell:"l::'i"

Claims (3)

[Claims] (1) A tank body with a working hole opened in the upper surface and the working hole closed with a lid, and a rotating tank inserted through the working hole and placed on the bottom of the tank body and closed on the entire surface;
an outlet tube connected to the swirl tank and communicated with the bottom of the swirl tank, one end of which is coupled to the outlet tube coupling side of the swirl tank and communicated with the bottom of the swirl tank, and the other end opposite to the outlet tube coupling side; A fuel tank comprising: a fuel introduction pipe that opens near the bottom of the tank body on the side; and a vapor removal pipe that has one end opened at the top of the swirling tank and the other end opened at the top of the tank body. (2) A filter is built into the swirling tank, an outlet tube is communicated with the filter, a fuel pump is connected to the outlet tube within the tank body, and the fuel pump is supported on the lid via a bracket. The fuel tank according to claim 1, characterized in that: (3) Claims characterized in that one end of the vapor removal pipe is opened in the filter and a through hole is bored in a portion corresponding to the upper part of the swirl tank, and the other end is fixed to a bracket. The fuel tank described in item 2.