JP3001714B2 - Car fuel tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel tank for an automobile which prevents running out of fuel when the automobile turns a curve when the fuel remaining in the fuel tank is small.

[0002]

2. Description of the Related Art A fuel tank of an automobile generally has a sectional structure as shown in FIG. A filler pipe 2 connected to the outside of the vehicle body is connected to the fuel tank 1, from which fuel 3 is injected. The injected fuel 3 is sucked up from a suction pipe 5 of a fuel pump 4 installed outside (or inside) the fuel tank 1 and sent to a fuel supply device of the engine. The suction pipe 5 hangs down near the bottom of the fuel tank 1 so that the fuel 3 can be used up to the end as much as possible.

[0003] On the bottom surface of the fuel tank 1, a chamber 6 configured to surround the end of the suction pipe 5 is provided. This chamber 6 is used to prevent the intake pipe 5 from sucking air and running out of fuel even when the vehicle runs in a curve and the fuel 3 leans when the fuel 3 in the fuel tank 1 becomes low. A certain amount of the fuel 3 is held at the end of the suction pipe 5 so that the fuel 3 does not exist.

As shown in FIGS. 5 and 6, the chamber 6 has a bottom plate 7 and a revolving wall 8 integrally assembled. The chamber 6 surrounds the suction pipe 5, and the circumference of the chamber 9 is approximately half a circumference. And a swirling flow path 10 for communicating the chamber chamber 9 with the outer peripheral portion.

FIGS. 7A and 7B show VII-VII of FIG.
It is sectional drawing which follows a line. As shown in FIG.
The fuel 3 flows into the chamber chamber 9 from the swirl flow path 10 even when the liquid level is lower than the height of the swirl wall 8. The liquid level is kept the same as the liquid level at the outer periphery of the chamber 6, and the suction pipe 5 can suck the fuel 3.

Now, when the vehicle enters a curve and acceleration in the vehicle width direction acts on the fuel tank 1, the remaining fuel 3 flows to one side of the fuel tank 1, but the fuel 3 in the chamber chamber 9 does not. As shown in FIG. 7 (b), the swirling wall 8 blocks and remains in the chamber 9 by v 1. For this reason, the end of the suction pipe 5 is kept below the liquid level of the fuel 3, and it is possible to prevent the suction pipe 5 from sucking air and causing the fuel to run out.

Here, when the dimension w1 in the vehicle width direction of the chamber 9 is increased to w2, the volume v1 of the fuel 3 held in the chamber 9 during the curve running increases to v2, The fuel 3 can be used effectively by delaying the occurrence of running out of fuel in. For this reason, it is desirable to make the dimension w1 of the chamber 9 in the vehicle width direction large.

[0008]

However, the chamber 6 configured as described above is inserted into the fuel tank 1 through a limited diameter of the opening 11 provided at the upper part of the fuel tank 1 as shown in FIG. As described above, if the dimension w1 of the chamber 9 in the vehicle width direction is increased as described above, the chamber 6 cannot be inserted into the fuel tank 1. In particular, in a synthetic resin injection-molded tank that occupies the mainstream of the fuel tank 1 in recent years, the diameter of the opening 11 cannot be increased in order to secure strength. There is a concern about running out of fuel when traveling on a curve as described above.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to effectively use fuel by delaying the occurrence of fuel shortage when a vehicle runs on a curve when the amount of fuel remaining in a fuel tank is low. Another object of the present invention is to provide a fuel tank for an automobile having a chamber that can be installed in the fuel tank even from a small opening.

[0010]

In order to achieve the above object, a fuel tank for an automobile according to the present invention communicates with a chamber chamber surrounding an end of a suction pipe connected to a fuel pump, and communicates the space inside the chamber with the outer periphery. Swirl channel and
In a fuel tank of an automobile having a chamber consisting of: a straight portion along the traveling direction of the automobile in the chamber by bending the longitudinal direction of the chamber substantially along the traveling direction of the automobile and bending an intermediate portion of the chamber. And a sloping portion extending obliquely with respect to the traveling direction of the vehicle, so that the size of the entire chamber in the vehicle width direction is adjusted to
The cross-sectional dimension of the chamber in the vehicle width direction is made wider, and the suction pipe is suspended substantially at the center of the sloping portion.

[0011]

In this manner, the apparent size of the entire chamber in the vehicle width direction can be ensured widely, so that running out of fuel when the vehicle is running in a curve is delayed, and fuel is effectively used. Used for Also the chamber car
Since the outer dimensions in the width direction can be set to the same level as the conventional one, even if the diameter of the upper opening of the fuel tank is small, it can be installed in the fuel tank without any problem, and the strength of the fuel tank can be sufficiently secured.

[0012]

An embodiment of the present invention will be described below.
1 is a plan view of a chamber according to the present invention, FIG. 2 is a perspective view of the chamber, and FIGS. 3 (a) and 3 (b) are III-III in FIG.
It is sectional drawing which follows a line.

The chamber 21 includes a bottom plate 22 and a swivel wall 23 erected on the bottom plate 22.
It has a chamber chamber 24 surrounding the suction pipe 5 connected to the fuel pump, and a swirling flow path 25 connecting the chamber chamber 24 to the outer peripheral part. As shown in FIGS. It is installed on the bottom surface 1 '. The fuel 3 in the fuel tank when the remaining amount of fuel is low flows into the chamber 24 through the swirl flow path 25 and is supplied to the suction pipe 5.
Is sucked up and sent to the engine.

As shown in FIG. 1, the longitudinal direction of the chamber 21 is substantially along the traveling direction of the vehicle, and
The external dimension w0 in the direction is constant over the entire length of the chamber 21 in the longitudinal direction. The external dimensions w0 in the vehicle width direction
Has such a size that the chamber 21 can be inserted into the upper opening 11 of the fuel tank 1 shown in FIG.

The middle portion of the chamber 21 is bent, so that a straight portion 24a along the traveling direction of the vehicle and a sloping portion 24b extending obliquely to the traveling direction of the vehicle are formed in the chamber 24. , Chamber
The dimension w1 of the entire chamber 24 in the vehicle width direction is
It is wider than the cross-sectional dimension w2 in the vehicle width direction . The angle of the skewed portion 24b may be about 15 ° with respect to the straight portion 24a, and may be inclined to the left or right. The order of the straight portion 24a and the skewed portion 24b is not limited. Note that the drooping position of the suction pipe 5 is substantially at the center of the skewing portion 24b.

Since the chamber 21 is configured as described above, when the remaining amount of the fuel 3 becomes low as shown in FIG. 3A, the vehicle enters a curve running, and as shown in FIG. When the liquid level of the fuel 3 held in the chamber is inclined , the dimension w1 of the entire chamber chamber 24 in the vehicle width direction is obtained.
The fuel 3 is held in a portion w3 (see also FIG. 1) which is a difference between the cross section dimension w2 of the chamber chamber 24 in the vehicle width direction . That is,
At the connection between the swirl flow path 25 through which fuel enters and exits and the chamber chamber 24, the retained fuel increases by the increment of the fuel provided by the portion w3. For this reason, the fuel holding amount v1 in the chamber
The fuel holding amount v2 is greatly increased as compared with the fuel holding amount v2 when the cross-sectional dimension of the entire chamber 24 in the vehicle width direction is only w2, and it is possible to delay the occurrence of fuel shortage when traveling on a curve, thereby effectively using the fuel 3. Can be used.

The chamber 21 extends in the vehicle width direction.
Of the vehicle width direction is constant
Even if the dimension w0 is small, it has a sufficient fuel holding capacity.
The upper opening 11 of the fuel tank 1 can be easily passed, and it is not necessary to increase the diameter of the opening 11. Therefore, the strength of the fuel tank 1 can be sufficiently secured.

[0018]

As described above, according to the present invention, a straight portion along the traveling direction of the vehicle is formed in the chamber by bending the middle portion of the chamber so that the longitudinal direction of the chamber is substantially along the traveling direction of the vehicle. A sloping part extending obliquely to the traveling direction of the car is formed to form the entire chamber.
Determine the size of the body in the vehicle width direction
Because the suction pipe is suspended at the approximate center of the sloping part, the apparent size of the chamber in the vehicle width direction can be secured widely, and the inside of the fuel tank can be secured. well into the vehicle is cornering when the remaining amount of fuel is low, tea
The vehicle width of the chamber
The fuel is held at the portion obtained by subtracting the cross-sectional dimension in the direction, so that the amount of fuel held in the chamber increases, and the running out of fuel is delayed, so that the fuel can be used effectively.

The chamber has an outer dimension in the vehicle width direction.
Because the method can be set to the same level as before, there is no need to increase the diameter of the upper opening of the fuel tank, and even if the diameter of the upper opening is small, it can be installed in the fuel tank without problems and the strength of the fuel tank is sufficient Can be secured.

[Brief description of the drawings]

FIG. 1 is a plan view of a chamber showing one embodiment of the present invention.

FIG. 2 is a perspective view of a chamber.

FIGS. 3A and 3B are cross-sectional views taken along line III-III in FIG.

FIG. 4 is a sectional view of a general automobile fuel tank.

FIG. 5 is a perspective view of a chamber showing a conventional technique.

FIG. 6 is a plan view of a chamber showing a conventional technique.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fuel tank 3 Fuel 4 Fuel pump 5 Suction pipe 11 Opening 21 Chamber 22 Bottom plate 23 Revolving wall 24 Chamber room 24a Straight part 24b Slanting part 25 Swirl channel w0 Horizontal width of chamber w1 Total width of chamber w2 Cross section of middle part of chamber Width

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60K 15/02 F02M 37/00 301 B65D 25/04

Claims (1)

(57) [Claims] And 1. A chamber chamber surrounding the end portion of the suction pipe leading to the fuel pump, the fuel tank of a motor vehicle having a chamber consisting of a swirl channel for communicating the chamber interior to the outer peripheral portion, the longitudinal of the chamber By refracting the middle part of the chamber so that the direction is substantially along the traveling direction of the vehicle, a straight portion along the traveling direction of the vehicle and a sloping portion extending obliquely to the traveling direction of the vehicle in the chamber. Forming the chamber chamber
Cut the overall dimension of the chamber width in the vehicle width direction.
A fuel tank for an automobile, wherein the suction pipe is made to be larger than a surface dimension and the suction pipe is suspended substantially at the center of the sloping portion.