JPS60169324A - Fuel tank for automobile - Google Patents

Abstract

PURPOSE:To facilitate the layout and assembling operations of a reservoir tank by molding the reservoir tank integral with a fuel filler tube with resin material. CONSTITUTION:A reservoir tank 6A interposed on the way of an evaporator hose 5 connectively communicating to an upper air chamber 4 of a tank body 1 for affording ventilation between the inside and outside of the tank is molded integral with a neck portion 2a of a fuel filler tube 2 with resin material. By such arrangement of the fuel filler tube 2 can be disposed the reservoir tank 6A without any particular fixed members. Further, since the neck portion 2a is located above the tank body 1 in a dead space of a car body, any particular consideration concerning the arrangement of the tank 6A can be dispensed with.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a fuel tank for a 011m vehicle.

Prior art automobile fuel tank (as shown in Figure 1, air vent hose 3 connected to the neck @ 21L of the tube 2 + 4 opening fl13a)
k, penetrates the upper wall 1a' of the tank body 1 and protrudes to an arbitrary height position, and when refueling, the fuel level slowly closes the opening @3 & until it reaches the level of the opening fffi3a. By doing so, the full amount is regulated and an air chamber 4 is secured in the upper part of the tank body 1. Further, an evaporator hose 5 communicating with the air chamber 4 is connected to the upper wall 1a of the tank body, and fuel vapor generated due to temperature rise is introduced into a canister (not shown) via the evaporator hose 5. I'm trying to process it.

The air chamber 4 in the upper part of the tank body described above must have a sufficiently large volume so that even if the fuel expands due to a rise in fuel temperature, it will not flow into the fuel vapor volator hose 5. What if the planar projected area of the main body 1 was expanded to secure the predetermined volume of the air chamber 4?
Not only does this cause a major hindrance to the arrangement layout of the tank body 1, but also fuel tends to flow into the evaporator hose 5 when parked on a slope. Thus, the entire predetermined volume of the air chamber 4 is secured. However, if the height of the tank body 1 is set as a dog in this way, the ground clearance of the floor F becomes high and the interior space is reduced, especially in the car mK6 where the tank body 1 is mounted on the lower surface of the floor F. Because of this, the setting of the height of the tank body 1 is restricted due to the ground height of the floor F, and it is necessary to ensure a sufficiently large volume of the air chamber 4. As shown in page 141 of Nissan Cedric Gloria 430 type maintenance required flF published by Nissho Jidosha Co., Ltd. in July, the height of the tank body can be kept small by inserting a reservoir tanker in the middle of the evaporator hose. It is known that this was done. As shown in Fig. 2, this is a separately formed reservoir tank 6'j: interposed in the middle of the evaporator hose 5 mentioned above, and the tank body l is the upper layer when the fuel is filled to a specified level. The height dimension is set to be as small as possible, hl, so that the air chamber 4 is formed with a slight height at the part. The above-mentioned air chamber and the position where the evaporator hose 5 is connected to the top wall 1a of the methane tank body are such that when the vehicle is tilted at the maximum allowable level with a full fuel level, the connection part of the evaporator hose 5 is lower than the fuel level. It is appropriately set so that it is upward. By interposing the reservoir tank 6 in the middle of the evaporator hose 5 in this way, when the fuel expands due to a rise in fuel temperature, the overflow of the fuel is detected and stored in the reservoir tank 6 as shown by the chain line in the figure, and the evaporated fuel is The air is led from an air chamber 7 in a part of the upper part of the reservoir tank 6 through an evaporator hose 5 to a canister (not shown).

Therefore, even if the height of the tank body 1 is small, the expansion of the fuel can be absorbed and the evaporated fuel can be processed without any problems, making it possible to lower the ground clearance of the vehicle floor and expand the single-chamber space. There are advantages.

However, although this reservoir tank attached type offers the above-mentioned advantages, it is necessary to mount the reservoir tank 6 on the vehicle body separately from the tank body 1, so for example, all the reservoir tanks 6 must be mounted near the tank body 1 mounting part. It is necessary to use a bracket or the like to install the reservoir tank 6 on the side of the trunk room where there is relatively free space, which makes the installation layout of the reservoir tank 6 difficult, and the assembly work is likely to become a blind spot for workers on the side of the trunk room. Since this process had to be carried out manually, it caused problems such as a major hindrance to work efficiency.

Purpose of the Invention In view of the above-mentioned conventional situation, it is an object of the present invention to provide a fuel tank for an automobile with a reservoir tank, which allows easy layout and assembly of the reservoir tank. .

Structure of the Invention In order to achieve the above-mentioned object, the present invention has the following features: Even if there is a misalignment between the tank body mounting position and the filler vessel setting location, or a difference in the molding corner of the Tsuuel filler tube itself, Focusing on the fact that it is molded with a resin material so that it can absorb the misalignment when installing, the inside of the tank is connected to the outside of the tank, and the inside and outside of the tank are fully ventilated.
A reservoir tank inserted in the middle of the evaporator hose is integrally molded with the seven-wheel filler tube using a resin material.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, with the same reference numerals assigned to the same parts as in the conventional structure.

That is, in the present invention, as shown in FIG. 3.4, a reservoir tank 6Ai resin is inserted in the middle of an evaporator hose 5 that communicates with and is connected to the upper air chamber 4 of the tank body 1 and ventilates the inside and outside of the tank. It is integrally molded with the 7-year filler tube 2, specifically on the neck part 2a of the 7-year filler tube 2.

By integrally molding the reservoir tank 6Af onto the neck i2a of the fuel filler tube 2 in this manner, the reservoir tank 6A can be arranged without requiring any special fixing member by routing the fuel filler tube 2. Moreover, this filler neck 82
Dead space of the car body at a higher place than the AI tank body 1,
For example, since the reservoir tank 6A is placed in a space that does not interfere with the rear wheels, such as on the side of the trunk room or in the wheel house, there is no need to take special consideration in the arrangement of the reservoir tank 6A, and the layout and assembly work of the reservoir tank 6A is not necessary. It is possible to further improve your performance.

Figure 5 shows reservoir tank 6A all rear wheel houses 10
This shows an example in which the fuel inlet 2b of the fuel filler tube 2 is disposed protruding within the filler vessel 12 disposed in the fuel tank ender 11, and the reservoir tank 6A is integrally molded with the filler neck portion 2a. Together with the neck s2a, it is arranged at the back of the wheel house 10 approximately along the curved shape of the neck s2a so as not to interfere with the rear wheel 14. The outlet side of the evaporator hose 5 passes through the wheel house inner 10a't and is connected to a canister (not shown). In addition, in the figure, tab is the rear wheel house outer, and 13 is the filler vessel 12.
15 indicates the trunk floor.

Incidentally, depending on the case, the inlet side of the air vent hose 3 and the air vent hose 5 may be integrally molded with the tube filler tube 2 as shown by the chain line in FIG.

Effects of the Invention As described above, according to the present invention, since the reservoir tank is made of resin and is integrally molded with the TSUEL filler tube, the reservoir tank does not require a special attachment member when the TSUEL filler tube is routed. Moreover, even if there is a misalignment between the tank body mounting part and the reservoir tank arrangement part, it can be absorbed by the elasticity of the twer filler tube and properly arranged. Moreover, the reservoir tank can be placed in the free space inside the wheel house along with the 7-wheel filler lift.
Dead space in the car body can be used effectively, and even when placed in the wheel house, it has sufficient durability against chipping, splashing, etc., so it prevents fuel leakage caused by corrosion or damage. This is very advantageous in terms of disaster prevention measures as it does not occur. Furthermore, since the reservoir tank and the 7-element filler tube are integrally molded, the number of parts management steps can be reduced, which can greatly contribute to cost reduction, which has great practical effects.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views showing different conventional examples; Figure 3 is a cross-sectional view showing an embodiment of the present invention; Figure 4 is a perspective view of a beam reservoir tank; Figure 5 is an example of mounting the same reservoir tank. FIG. 1...tank body, 1a...tank body upper wall, 2.
... Tsuyuel fin tube, 3... Air vent hose, 4... Upper air chamber of tank body, 5... Ehaphorator hose, 6A... Reservoir tank. Two other people Figure 1 Figure 2 et al. Figure 4

Claims (1)

[Claims] (1) It has a structure in which a reservoir tank is interposed in the middle of the evaporator hose that communicates and is connected to the upper air chamber of the tank body, and the reservoir tank is integrally molded with the 7-wheel filler unit using a resin material. A fuel tank for automobiles.