JP2006226222A - Fuel pump module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a configuration of a fuel pump module capable of increasing amount of catching dust of a fuel filter without increasing its size as much as possible. <P>SOLUTION: In this fuel pump module 1, a suction filter 14 is constituted by setting a region 14a extending in the horizontal direction and a region 14b extending in the vertical direction by bending mesh like a flat bag. The region 14a extending in the horizontal direction is along a bottom wall 15a of a bottom part casing 15, and the region 14b extending in the vertical direction is along a side wall 15b of the bottom part casing 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel pump module that is provided in a fuel tank and supplies fuel in the fuel tank to an internal combustion engine.

  Conventionally, various fuel pump modules have been proposed. Patent Document 1 discloses a fuel pump module as an example.

  The fuel pump module of Patent Document 1 is integrally provided with a fuel pump and a fuel filter, and cleans the fuel in the fuel tank and sends it to the internal combustion engine.

In general, this type of fuel pump module is provided with a suction filter for removing dust from the fuel sucked by the fuel pump and a discharge filter for removing dust from the fuel discharged by the fuel pump. ing. The suction filter is disposed in a fuel storage portion formed in the fuel pump module, while the discharge filter is accommodated in an annular filter housing chamber formed in the fuel pump module.
JP-A-9-268957

  By the way, as for this kind of fuel filter, it is desirable to enlarge the fuel permeation | transmission area | region (mesh area), so that there is much dust mixing amount in a fuel. This is because the smaller the fuel permeation region of the fuel filter, the earlier it becomes clogged and the flow resistance increases and the discharge flow rate of the fuel pump may decrease.

  However, if the fuel permeation area of the discharge side filter of the fuel filter is increased, the volume of the discharge side filter, and thus the volume of the annular filter storage chamber for storing it, will increase, and the fuel pump module as a whole will also be large. It will become. Furthermore, since the discharge filter is disposed on the discharge side of the fuel pump, that is, on the high pressure side, it may be necessary to increase the thickness of the fuel pump module or provide a reinforcing member, which further increases the weight. May lead to

  This invention is made | formed in view of the said situation, The objective is to obtain the structure which can increase the dust trapping amount of a fuel filter in a fuel pump module, without enlarging as much as possible.

  In order to achieve the above object, the invention of claim 1 is characterized in that, in the fuel pump module, the suction filter is formed by bending a flat bag-like mesh.

  In the invention of claim 2, the suction filter of claim 1 is provided with a region extending in the horizontal direction and a region extending in the vertical direction.

  According to a third aspect of the present invention, in the suction filter according to the second aspect, the region extending in the lateral direction is along the bottom wall of the fuel storage portion, and the region extending in the vertical direction is along the side wall of the fuel storage portion. It is.

  According to the first aspect of the present invention, since the suction filter is formed by bending a flat bag-like mesh, the fuel permeation region of the suction filter can be expanded and the amount of dust trapped can be increased. Compared with the case where the fuel permeation area of the discharge filter is expanded, there is an advantage that the fuel pump module can be further reduced in size because the space of the fuel storage portion can be efficiently used.

  According to the second aspect of the present invention, the fuel permeation region of the suction filter can be expanded with a relatively simple configuration including a region extending in the horizontal direction and a region extending in the vertical direction.

  According to the third aspect of the present invention, the shape of the suction filter can be held relatively easily by arranging the region extending in the lateral direction and the region extending in the vertical direction along the bottom wall and the side wall forming the fuel reservoir. Can do.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments embodying the invention will be described with reference to the drawings. In this embodiment, a fuel pump module mounted in a fuel tank of an automobile equipped with an internal combustion engine is exemplified.

  FIG. 1 is a side view showing a schematic configuration of a fuel pump module mounted in a fuel tank, and FIG. 2 is a cross-sectional view of the fuel pump module.

  The fuel pump module 1 according to the present embodiment includes a lid portion 2 that is attached so as to close an opening 4 a provided in the upper portion of the fuel tank 4, and an in-tank housing that is accommodated in the fuel tank 4 below the lid portion 2. Part 3.

  The in-tank accommodating portion 3 is supported by the lid portion 2 so as to be movable up and down. In the present embodiment, two rods 5 extending downward from the lid 2 are loosely inserted into guide holes (not shown) provided in the in-tank accommodating portion 3.

  Further, a spring 6 serving as a compression spring is interposed between the lid 2 and the tank inner housing 3, and the tank inner housing 3 is moved downward with respect to the lid 2 by the urging force of the spring 6. The bottom surface of the tank accommodating portion 3 is pressed against the bottom surface 4 b of the fuel tank 4. Thereby, even when the height of the fuel tank 4 (the distance between the upper wall and the bottom wall) changes due to a change in the internal pressure of the fuel tank 4 or the like, the bottom surface of the in-tank accommodating portion 3 is the bottom surface of the fuel tank 4. 4b, the fuel can be easily introduced from the fuel tank 4 to the fuel storage portion 26 of the in-tank accommodating portion 3 even when the remaining amount is small.

  The in-tank accommodating portion 3 has a fuel pump 11, a discharge side filter 12, a regulator 13, a suction filter 14, and the like attached to one or both of an upper casing 16 and a bottom casing 15 made of resin. And the bottom casing 15 is integrated by overlapping vertically. A fuel storage part 26 for storing fuel is formed inside the tank storage part 3. The tank accommodating portion 3 is also provided with a fuel level gauge 9 for measuring the remaining amount of fuel according to the position of the float 10 floating on the fuel.

  The fuel pump 11 discharges the fuel in the fuel reservoir 26 toward the outside of the fuel tank 4, that is, toward the fuel injection valve of the internal combustion engine. In the present embodiment, the discharge port 29 side is inserted into a plurality of cylindrical portions 17 formed on the back surface of the upper wall of the upper casing 16, and is locked using a lock mechanism (for example, an engagement claw) 18. . The fuel pump 11 is connected to an external power source (or control device) via a cable 28 routed between the lid 2 and the tank housing 3 and a connector 7 provided on the upper surface of the lid 2. (Not shown).

  The discharge filter 12 removes dust from the fuel discharged by the fuel pump 11 and cleans it. In this embodiment, the discharge filter 12 is housed in a filter housing chamber 22 formed in the upper casing 16. In the configuration in which the discharge filter 12 is accommodated in the filter accommodating chamber 22, for example, an outer circumferential wall 19 and an inner circumferential wall 21 that are concentric with each other are provided on the annular bottom wall 20 to form an annular recess space (22). Is formed, and the discharge filter 12 is accommodated in the recess space, and then the lid member (the upper wall portion of the upper casing 16) is provided on the outer peripheral wall 19 and the inner peripheral wall 21 so as to close the upper opening of the recess space. Can be obtained by welding (welding).

  A regulator 13 is provided downstream of the discharge filter 12. The regulator 13 adjusts the pressure (fuel pressure) of the fuel supply line (not shown) leading to the discharge side of the fuel pump 11, that is, the fuel injection valve. In this embodiment, the inner peripheral wall of the filter housing chamber 22 is used. 21 is fitted into a two-stage bottomed cylindrical portion 23 provided at the lower end of 21 and fixed using a clasp (not shown).

  In the above configuration, the fuel discharged from the discharge port 29 of the fuel pump 11 flows into the annular region outside the discharge side filter 12 in the filter housing chamber 22 from the fuel passage 30 formed in the upper part of the tank housing portion 3. Then, it passes through the discharge side filter 12 from the outside to the inside.

  The fuel cleaned by the discharge-side filter 12 includes a tube 25 routed in an internal space between the lid 2 and the tank accommodating portion 3, a feed pipe 8 formed to protrude from the upper surface of the lid 2; And is sent to the internal combustion engine via a fuel pipe (not shown). However, a part of the fuel cleaned by the discharge filter 12 flows out from the regulator 13 and is returned to the fuel reservoir 26.

  The suction filter 14 removes dust from the fuel sucked by the fuel pump 11 and cleans it. In this embodiment, a flat bag-like mesh is used to enlarge the fuel permeation region (surface area of the bag). Is formed into a bent shape. Specifically, for example, the edges of two cloth-like meshes having substantially the same shape (for example, substantially rectangular shape) are bonded together and inflated to form a flat bag shape, which is bent into a substantially U-shape. Thus, a region 14 a extending in the horizontal direction and a region 14 b extending in the vertical direction are formed and accommodated in the bottom of the fuel storage portion 26. At this time, the region 14 a extending in the horizontal direction is along the bottom wall 15 a of the bottom casing 15, and the region 14 b extending in the vertical direction is along the side wall 15 b of the bottom casing 15. Then, the intake port (projection) of the fuel pump 11 is inserted into this bag. As a result, the fuel in the fuel reservoir 26 passes through the bag-shaped mesh from the outside to the inside and flows into the fuel pump 11. Note that the upper mesh of the two meshes to be bonded may be slightly smaller than the lower mesh to facilitate warping upward. In addition, the mesh may be appropriately attached to or covered with a frame (not shown) made of a resin or the like so that the shape of the bag is held by the frame to suppress stenosis or collapse.

  The jet pump nozzle module 27 transfers the fuel in the fuel tank 4 into the fuel storage part 26 of the tank accommodating part 3. In the present embodiment, a pipe 24 is provided projecting from the bottom wall 15a of the bottom casing 15 to the inside (upper side) to communicate the inside and outside of the bottom casing 15, that is, the inside of the fuel tank 4 and the fuel storage portion 26. A nozzle is protruded into the pipe 24, and a part of the fuel discharged from the fuel pump 11 is ejected toward the fuel storage section 26 side (that is, the upper side) by the nozzle. Due to this jet flow, the pressure at the nozzle tip and the surrounding area is lowered, and the fuel flows from the fuel tank 4 into the fuel reservoir 26.

  According to the above embodiment, since the suction filter 14 is formed by bending a flat bag-like mesh, the fuel permeation region of the suction filter 14 can be expanded and the amount of dust trapped can be increased. In addition, there is an advantage that the fuel pump module 1 can be downsized as compared with the case where the fuel permeation region of the discharge side filter 12 is expanded by the amount that the space of the fuel storage unit 26 can be efficiently used.

  Further, according to the present embodiment, the fuel permeation region of the suction filter 14 can be expanded with a relatively simple configuration including the region 14a extending in the horizontal direction and the region 14b extending in the vertical direction.

  Furthermore, according to the present embodiment, the region 14a extending in the lateral direction is aligned with the bottom wall 15a of the bottom casing 15 (the bottom wall 15a of the fuel storage unit 26), and the region 14b extending in the vertical direction is the side wall of the bottom casing 15. By being along 15b (bottom wall 15a of the fuel storage part 26), the attitude | position of the suction filter 14 can be hold | maintained comparatively easily.

  The present invention can be embodied in another embodiment as follows. In other embodiments described below, the same operations and effects as in the above embodiments can be obtained.

  (1) In the above embodiment, the main components of the fuel pump module, such as the fuel pump, are provided not on the lid but on the tank housing part. However, the present invention is similarly applied to an embodiment in which this is provided on the lid. Can be implemented.

  (2) The arrangement and shape of the suction filter are not limited to those disclosed in the above embodiment, and the present invention can be implemented as various modifications without departing from the spirit of the present invention.

  Further, technical ideas other than the claims that can be grasped from the above embodiment will be described together with the effects thereof.

  (A) In the fuel pump module according to claims 1 to 3, the suction filters are formed by bonding the peripheral edges of two bag-shaped meshes, and either one of the two bag-shaped meshes. It is preferable to make (the width) smaller than the other.

  If it carries out like this, when two meshes are bonded together, it will become easy to warp to the small mesh side, and a suction filter can be formed more easily.

  (B) In the fuel pump module according to any one of claims 1 to 3, it is preferable that the suction filter is provided with a frame for holding the shape of the bag-like portion.

Is preferred.

  In this way, narrowing and crushing of the bag-like portion can be suppressed, and an increase in fuel suction resistance can be suppressed.

The side view which shows schematic structure in the state with which it installed in the fuel tank of the fuel pump module concerning embodiment of this invention. Sectional drawing of the fuel pump module concerning embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel pump module 4 Fuel tank 11 Fuel pump 14 Suction filter 14a The area | region extended to the horizontal direction 14b The area | region extended to the vertical direction 15a Bottom wall 15b Side wall 26 Fuel storage part

Claims (3)

In a fuel pump module comprising a fuel pump provided in a fuel tank and discharging the fuel in the fuel tank toward the outside of the fuel tank, and a suction filter for purifying the fuel sucked into the fuel pump,
A fuel pump module, wherein the suction filter is formed by bending a flat bag-shaped mesh.   The fuel pump module according to claim 1, wherein the suction filter has a region extending in a horizontal direction and a region extending in a vertical direction. A fuel storage section formed by being surrounded by at least a bottom wall and a side wall of a casing of the fuel pump module;
3. The fuel pump module according to claim 2, wherein a region extending in the horizontal direction is along the bottom wall and a region extending in the vertical direction is along the side wall. 4.

Images