JP3924152B2 - Fuel storage structure in pump module - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a fuel storage structure in a pump module that can quickly discharge the residual fuel when the residual fuel in the fuel tank decreases.
[0002]
[Prior art]
The fuel in the fuel tank is supplied to the engine through the fuel tube or the like by the suction force of the fuel pump from the pump module disposed in the fuel tank, but the remaining amount of the fuel is reduced. In this case, the fuel tank or the pump module is devised so that the remaining fuel remaining at the bottom of the fuel tank can be easily discharged from the fuel tank.
[0003]
FIG. 5 shows that the bottom A of the fuel tank is formed so as to incline toward the pump module B so that the remaining amount of fuel accumulates on the bottom of the inclined portion, and the collected residual fuel is supplied to the fuel pump. It is made to discharge by the suction force.
Also, as shown in FIGS. 6 and 7, a hook-like member C is attached to the outer shell of the pump module B, and the residual fuel accumulated at the bottom is introduced and accumulated in the hook-like member C by a forcing means such as a jet pump D. The fuel accumulated in the bowl-like member C is discharged by the suction force of the fuel pump.
[0004]
[Problems to be solved by the invention]
In the conventional example of FIG. 5 described above, the shape of the bottom portion A of the fuel tank needs to be inclined in advance, and the fuel tank must correspond to various shapes depending on the type of vehicle in which it is used. Under the constraints, it was difficult to determine the bottom A of the fuel tank as an inclined shape in advance in the product development and production stage.
6 and 7, since the bowl-shaped member C is attached to the outer shell of the pump module B so as to surround the pump module B, the volume of the pump module as a whole increases, and the recent trend toward smaller and lighter products In order to introduce the residual fuel into the bowl-shaped member C, a separate lifting device such as a jet pump D is required, and the number of parts is increased and the cost is not low.
The present invention solves the above problems.
[0005]
[Means for Solving the Problems]
The present invention solves the above-mentioned problems by forming a structure for accumulating fuel in a filter provided at a position on the fuel tank side serving as a suction path to the fuel pump.
[0006]
As a specific configuration, the pump module is disposed within the fuel tank, a bottom plate, a plurality of partition plates which form a communication hole in and bottom plate-side Ri partition a space above the standing wall and the bottom plate of the peripheral portion of the bottom plate A fuel storage space is configured by a box-shaped rigid protector having an upper portion opened and a filter cloth that surrounds the protector, and the bottom plate is similar to the partition plate on the bottom plate side. some notches in-cylinder body form standing設形 and a said fuel reservoir structure in the pump module in the projection of the outward composed as a fuel flow path by attaching the cap for connecting the discharge pipe of the tubular member To do.
[0007]
Further, the invention is characterized in that the fuel storage structure in the pump module is formed by forming an adhesion prevention rib having a predetermined interval on the back side of the bottom plate and having an intermittent shape.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[Example 1]
FIG. 1 is a perspective view of a fuel storage structure in a pump module of the present invention, and FIG. 2 is a cross-sectional view thereof. The fuel storage tank 1 also serves as a filter function for filtering dust contained in the fuel, and is disposed at the bottom of the fuel tank on the upstream side of the suction path to the fuel pump.
The fuel storage tank 1 has a substantially flat rectangular shape as a whole. A cap 2 connected to a suction path to a fuel pump is connected to the upper part of the fuel storage tank 1, and the cap 2 is connected to reinforce the fuel storage tank. And a filter cloth 5 surrounding the outer periphery of the protector 4.
[0009]
The cap 2 is formed in a cylindrical shape, one end portion 6 of which is connected to the suction passage of the fuel pump, the other end portion is formed with a flange portion 7, and a fitting portion 8 is formed on the inner wall portion thereof. .
[0010]
The protector 4 is manufactured from a synthetic resin or the like, has rigidity, and has an overall shape of a box shape with an upper portion opened, a bottom plate 9 constituting a bottom portion, and a peripheral portion standing upright from a peripheral portion of the bottom plate 9 And an appropriate number of partition plates 11 for partitioning the space on the standing wall 10 and the bottom plate 9. The bottom plate 9 side of the partition plate 11 is formed with an appropriately shaped opening 12 communicating with each other. Accordingly, a partitioned space 3 that is partially communicated is formed between the partition plates 11 on the bottom plate 9, and the space 3 serves as a fuel storage place.
[0011]
Further, the upper end portion of the partition plate 11 is substantially at the same level as the upper end portion of the peripheral wall 10, and the overall shape of the partition plate 11 is formed of a reinforcing body such as a parallel grid shape or a well frame shape. ing.
Further, from the bottom plate 9, similarly to the partition plate 11, a cylindrical body 13 with a part cut away is formed so as to stand higher than the partition plate 11, and the fitting portion 8 of the cap 2 is provided on the outer periphery of the tip portion. And a convex portion 14 to be fitted. Further, a protrusion 15 is formed outward from the outer peripheral portion of the cylindrical body 13 at a height position substantially the same as the edge of the upper end portion of the partition plate 11, thereby forming a receiving portion for the filter cloth 5. The protrusion 15 may be formed intermittently or may be formed in a bowl shape.
[0012]
The filter cloth 5 includes a filter through which fuel passes and removes dust. The filter cloth 5 includes a dish-shaped upper filter cloth 17 and a lower filter cloth 18 each having a flange portion 16. The protector is disposed on the inner upper surface of the lower filter cloth 18. The bottom filter 9 is disposed, and the upper filter cloth 17 is placed and disposed so as to cover the protector 4. It is also possible to form the upper and lower filter cloths 17 and 18 in a bag shape. A hole 19 is formed in the upper filter cloth 17, and the cylindrical body 13 is inserted into the hole 19, and the peripheral portion of the hole 19 of the upper filter cloth 17 is placed on the protrusion 15. The upper and lower filter cloths 17 and 18 are joined to each other by welding or the like at the flange portion 16 to form the sealed space 3.
[0013]
Since the cylindrical body 13 is erected and formed high, the upper part thereof protrudes from the upper filter cloth 17. The cap 2 is fitted into the protruding part, and the outer periphery of the distal end part of the cylindrical body 13 is inserted. The cap 2 is fixed on the upper filter cloth 17 by fitting the formed convex portion 14 with the fitting portion 8.
[0014]
With the above configuration, the fuel accumulated at the bottom of the fuel tank is adsorbed by the filter cloth 5, passes through the filters of the upper and lower filter cloths 17 and 18 constituting the filter cloth 5, and the partition plate on the bottom plate 9 of the protector 4. 11 is accumulated in the space 3 between 11 and passes through the cylinder 13 and the cap 2 by the suction force of the fuel pump, and is discharged from the suction passage to the engine.
[0015]
For the coupling between the cap 2 and the cylindrical body 13, appropriate means such as screwing, taper, etc. can be considered in addition to fitting.
[0016]
[Example 2]
FIG. 3 is a sectional view of another fuel storage tank 20, and FIG. 4 is a back view of the bottom plate 21 of the protector 4 having a box shape. A plurality of ribs 22 are intermittently formed on the back surface side of the bottom plate 21, so that a gap 24 is formed between the lower filter cloth of the filter cloth 23 and the back surface side of the bottom plate 21, and the bottom plate 21 and the filter cloth 23 are formed. Is prevented from sticking to each other.
Further, the bottom plate 21 may be provided with an appropriate discharge hole for sucking upward the fuel accumulated in the gap 24.
[0017]
【The invention's effect】
The fuel storage structure in the pump module of the present invention configured as described above has a function of storing fuel in addition to the conventional filter function in the filter cloth material disposed in the fuel tank. When discharging the fuel, it is no longer necessary to form the bottom of the fuel tank to be inclined or to install other parts for discharging separately.
Further, a predetermined space can be obtained between the upper and lower filter cloth materials by a rigid protector in the filter, and a space for storing the remaining fuel is secured.
Therefore, the upper and lower filter cloth materials can hold the predetermined space by the protector without being attracted to each other by the negative pressure in the space generated by the suction force of the pump or the like.
With the above configuration, it is possible to continue to supply fuel satisfactorily to the end even when the amount of residual fuel in the fuel tank is low.
[Brief description of the drawings]
FIG. 1 is a perspective view of a fuel storage structure in a pump module of the present invention.
FIG. 2 is a cross-sectional view of a fuel storage structure in the pump module of the present invention.
FIG. 3 is a cross-sectional view of another embodiment of the fuel storage structure in the pump module of the present invention.
FIG. 4 is a rear view of the protector.
FIG. 5 is a side view of a conventional pump module.
FIG. 6 is a cross-sectional view of a conventional pump module.
FIG. 7 is a cross-sectional view of a fuel system including a conventional pump module.
[Explanation of symbols]
1 .. Fuel storage tank 2 .. Cap 3 .. Space 4 .. Protector 5 .. Filter cloth 6 .. One end 7 .. Gutter 8 .. Fitting 9 .. Bottom plate 10. Partition plate 12, opening 13, tube 14, convex portion 15, projection 16, collar portion 17, upper filter cloth 18, lower filter cloth 19, hole 20, rib 21, and bottom plate 22 ・ ・ Rib 23 ・ ・ Filter cloth 24 ・ ・ Cavity

Claims (2)

In the pump module is disposed within the fuel tank, the bottom plate, the upper portion comprising more a plurality of partition plates a space on the standing wall and the bottom plate of the peripheral edge portion forming the communication hole in the partition Ri and the bottom plate side of the bottom plate a protector having a stiffness of the opened box shape, by a filter cloth made by surrounding the protector constitutes a fuel reservoir space, and the notch part of the partition switching plate similarly to the bottom plate side from the bottom plate cylinder A fuel storage structure in a pump module , wherein a body is erected and a cap connected to a discharge pipe is attached to a projecting portion of the cylindrical body outward to form a fuel flow path .   2. The fuel storage structure in a pump module according to claim 1, wherein an adhesion preventing rib having a predetermined interval is formed on the back surface side of the bottom plate and formed in an intermittent shape.

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