JP4777281B2 - Fuel pump module - Google Patents

Description

  The present invention relates to a fuel pump module.

There is known a fuel pump module that stably supplies fuel even when the remaining amount of fuel in the fuel tank decreases (see, for example, Patent Document 1). The fuel pump module of Patent Document 1 has a sub tank that accommodates the fuel pump. This fuel pump has two pump parts, and one of the pump parts sucks the fuel in the sub tank and supplies it outside the fuel tank. The other pump unit sucks fuel outside the sub tank and pumps it into the sub tank. The fuel pump has two suction ports, a first suction port that sucks fuel in the sub tank and a second suction port that sucks fuel outside the sub tank. The second suction port is inserted into a communication passage formed at the bottom of the sub tank and protrudes out of the sub tank. A filter medium for filtering the fuel to be sucked is attached to each suction port.
US Pat. No. 5,596,970

  However, in the fuel pump module of Patent Document 1, the filter medium for filtering the fuel pumped up to the sub tank is a bag-shaped filter medium having a hole to which the second suction port is connected. For this reason, it is necessary to process the filter medium into a bag shape or to form a hole to which the second suction port is connected in the filter medium, and the fuel pump module becomes expensive.

  An object of the present invention is to provide a fuel pump module that can be manufactured at low cost.

In order to achieve the above object, according to the first aspect of the present invention, the fuel tank is housed in the fuel tank, and the wall portion has the first communication passage that communicates the inside and the outside, and the fuel is accumulated in the inside. A sub-tank, a first pump that is accommodated in the sub-tank, sucks fuel inside the sub-tank, and supplies the fuel to the outside of the fuel tank; and is accommodated in the sub-tank and connected to the first communication path, and fuel outside the sub-tank is A second pump that pumps into the sub-tank through the first communication path, a plate-shaped filter medium that is provided on the outer wall surface of the bottom of the sub-tank wall, and filters the fuel flowing into the first communication path ; An engaging projection that extends downward from the bottom of the sub-tank with the filter medium pressed from the bottom to the outer wall surface between the bottom surface and the outer wall surface of the fuel tank. Club By being elastically deformable form to tip engages passing through the engaging hole, it is characterized by comprising a mounting plate for mounting the filter medium in the sub-tank, the.

According to this configuration, the filter medium is attached to the sub tank by pressing the filter medium against the outer wall surface of the bottom of the sub tank with the mounting plate, so that the filter medium can be processed into a bag shape as in the prior art, There is no need to form a hole to be attached to the second suction port in the filter medium. For this reason, the structure of the filter medium can be simplified, and the fuel pump module can be manufactured at low cost.

  According to the second aspect of the present invention, the mounting plate has the second communication path that communicates the inner side surface facing the outer wall surface and the outer surface on the opposite side, and the mounting plate has the mounting plate on the outer wall surface. When attached to the outer wall surface, the first annular protrusion extends toward the inner surface so that the first communication path and the second communication path are disposed on the inner side, and compresses the filter medium between the tip and the inner surface. It is characterized in that a part is formed.

  According to this configuration, since the mounting plate has the second communication path that communicates the inner side surface facing the outer wall surface and the outer side surface opposite to the inner side surface, the fuel outside the sub tank is supplied to the plate-like filter medium. It can be made to flow into the end face in the plate thickness direction. Thereby, compared with the case where it flows in from the side surface of a plate-shaped filter medium, an effective filtration area can be enlarged.

  In addition, when the mounting plate is attached to the sub tank, the outer wall surface extends toward the inner side surface of the mounting plate so that the first communication path and the second communication path are arranged on the inner side, and the front end portion and the inner side surface thereof The 1st annular projection part which compresses a filter medium between is formed. Thereby, it can suppress that a fuel penetrate | invades from the side surface of a filter medium. As a result, fuel can be prevented from flowing between the filter medium and the outer wall surface into the first communication path, that is, fuel can be prevented from flowing through the first communication path without passing through the filter medium. Will improve.

  When the filter medium is deformed by the suction force of the second pump part and is in close contact with the first communication path, the fuel that has flowed into the filter medium is discharged only from the portion facing the opening of the first communication path. Will decrease.

  According to the invention described in claim 3, the outer wall surface is formed with a raised portion on the inner side of the first annular protrusion. According to this, it is possible to prevent the surface facing the outer wall surface of the filter medium from coming into close contact with the first communication path by the raised portion, and to form a gap between the outer wall surface and the surface facing the outer wall surface of the filter medium. And the reduction of the effective filtration area of the filter medium can be suppressed.

  According to the fourth aspect of the present invention, the mounting plate has the second communication path that communicates the inner surface facing the outer wall surface and the outer surface on the opposite side, and the mounting plate has the mounting plate on the inner surface. When attached to the outer wall surface, the second annular protrusion extends toward the outer wall surface so that the first communication path and the second communication path are arranged on the inner side, and compresses the filter medium between the tip and the outer wall surface. It is characterized in that a part is formed.

  According to this configuration, since the mounting plate has the second communication path that communicates the inner side surface facing the outer wall surface and the outer side surface opposite to the inner side surface, the fuel outside the sub tank is supplied to the plate-like filter medium. It can be made to flow into the end face in the plate thickness direction. Thereby, compared with the case where it flows in from the side surface of a plate-shaped filter medium, an effective filtration area can be enlarged.

  In addition, when the mounting plate is attached to the outer wall surface, the inner side surface extends toward the outer wall surface so that the first communication path and the second communication path are disposed on the inner side, and the tip and the outer wall surface A second annular protrusion for compressing the filter medium is formed therebetween. Thereby, it can prevent that a fuel penetrate | invades from the side surface of a filter medium. As a result, the fuel can be prevented from flowing into the first communication path between the filter medium and the outer wall surface, that is, the fuel can be prevented from flowing into the first communication path without passing through the filter medium. improves.

  According to the fifth aspect of the present invention, the outer wall surface is formed with a raised portion on the inner side of the second annular projecting portion. According to this, it is possible to prevent the surface facing the outer wall surface of the filter medium from coming into close contact with the first communication path by the raised portion, and to form a gap between the outer wall surface and the surface facing the outer wall surface of the filter medium. And the reduction of the effective filtration area of the filter medium can be suppressed.

  According to the invention described in claim 6, a plurality of raised portions are formed so as to spread radially from the first communication path. According to this configuration, since the plurality of raised portions are formed radially on the outer wall surface from the first communication path, a flow path toward the first communication path is formed on the outer wall surface by the adjacent raised portion. . As a result, the filtered fuel flows into the first communication path without being disturbed by the raised portions.

  According to the seventh aspect of the present invention, the first communication path is formed at the bottom of the sub tank. According to this configuration, since the first communication path is formed at the bottom of the sub tank, the fuel can be pumped into the sub tank even when the remaining amount of fuel in the fuel tank decreases.

  According to the eighth aspect of the present invention, a check valve is provided between the second pump and the filter medium to allow the fuel to flow from the filter medium to the second pump. When fuel is passed through the filter medium to filter the fuel, an oil film is formed on the upstream side of the filter medium. Since the oil film has a water repellent effect, the moisture contained in the fuel is repelled by the oil film and the water can be prevented from flowing downstream of the filter medium. According to the structure of Claim 8, since the non-return valve is provided between the 2nd pump and the filter medium, sticking of the non-return valve due to water freezing can be suppressed.

According to the ninth aspect of the present invention, the check valve is attached to the bottom of the sub tank. According to this configuration, since the check valve is attached to the bottom of the sub tank, the structure of the check valve can be simplified, and the fuel pump module can be made inexpensive.

  According to invention of Claim 10, a filter medium is a nonwoven fabric, It is characterized by the above-mentioned. According to this configuration, the fuel can be filtered three-dimensionally, and the filtration efficiency is improved.

  According to invention of Claim 11, a filter medium is manufactured by cutting out the lump of a nonwoven fabric, It is characterized by the above-mentioned. Since a non-woven fabric lump cut to a predetermined plate thickness can be used as a filter medium, the manufacturing cost of the filter medium can be suppressed, and the fuel pump module can be made inexpensive.

  According to the invention described in claim 12, the filter medium is made of polyester, nylon, polypropylene, or polyacetylene. Polyester, nylon, polypropylene, or polyacetylene has excellent fuel resistance. By using these materials as filter media, the life of the fuel pump module can be extended.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
FIG. 1 is a cross-sectional view showing a state where the fuel pump module 1 is installed in the fuel tank 2. FIG. 1 shows a cross section taken along line II in FIG. In addition, the up-down direction shown by the arrow in FIG. 1 shows the gravity direction of the fuel tank 2 mounted in the vehicle. The fuel pump module 1 supplies the fuel in the fuel tank 2 to, for example, an internal combustion engine outside the fuel tank 2. As shown in FIG. 1, the fuel pump module 1 is disposed by being inserted into the fuel tank 2 from the opening 21 of the fuel tank 2, and is installed on the bottom surface 22 of the fuel tank 2. A flange 3 is attached to the opening 21, and the opening 21 is closed by the flange 3.

  The fuel pump module 1 is configured by assembling a pump unit 5 and the like to a sub tank 4 accommodated in a fuel tank 2. The sub tank 4 is connected to the flange 3 by a shaft 34.

  The flange 3 is made of resin and has a substantially disk shape. In the flange 3, the fuel discharge pipe 31 and the electrical connector 33 are integrally molded with resin. The fuel discharge pipe 31 is connected to the pump unit 5 housed in the sub tank 4 via a hose 32, and discharges the fuel discharged from the pump unit 5 to the outside of the fuel tank 2.

  The electrical connector 33 is electrically connected to an electrical connector (not shown) provided on the pump unit 5 by a lead wire and a power supply connector (not shown) provided on the pump unit 5, and supplies power to the pump unit 5.

  A shaft 34 for connection to the sub tank 4 is fixed to the end surface of the flange 3 on the sub tank 4 side by press fitting or the like. Although only one shaft 34 is shown in FIG. 1, in this embodiment, the flange 3 and the sub tank 4 are connected by two shafts 34.

  The sub tank 4 is made of resin, and includes a substantially disk-shaped bottom 41 and a side wall 42 extending upward from the outer peripheral edge of the bottom 41. An opening 43 is formed at the upper end of the side wall 42. An insertion portion 44 for inserting the other end side of the shaft 34 is formed on the inner wall surface of the side wall 42. The shaft 34 is inserted in the insertion portion 44 so as to be movable in the axial direction.

  A coil spring 35 is provided between the flange 3 and the sub tank 4 to urge the sub tank 4 downward and press the sub tank 4 against the bottom surface 22 of the fuel tank 2. One end of the spring 35 is supported by the flange 3 and the other end is supported by the insertion portion 44.

  Accordingly, even if the distance between the opening 21 and the bottom surface 22 of the fuel tank 2 fluctuates because the resin fuel tank 2 expands or contracts due to a change in internal pressure or a change in fuel amount due to a temperature change, the sub tank 4 can follow the position variation of the bottom surface 22.

  Legs 412 extending toward the bottom surface 22 of the fuel tank 2 are formed on the outer wall surface 411 of the bottom portion 41 of the sub tank 4, and a gap 45 is formed between the outer wall surface 411 and the bottom surface 22 of the fuel tank 2. . The bottom portion 41 is formed with a first opening 413 serving as a first communication passage according to a claim that communicates the inside and the outside of the sub tank 4. Further, a check valve 46 is provided on the bottom 41. The check valve 46 is a valve that opens and closes the first opening 413, and permits only fuel to flow from the outside to the inside of the sub tank 4. A second suction filter 59 as a filter medium according to the claims is attached to the outer wall surface 411 of the bottom portion 41. The fuel flowing into the sub tank 4 is filtered by the second suction filter 59.

  The pump unit 5 is supported on the side wall 42 of the sub tank 4 by a support mechanism (not shown). The pump unit 5 is configured by housing an electric fuel pump 52 in a case 51. The fuel pump 52 sucks the fuel in the sub-tank 4 and supplies it to the outside of the fuel tank 2. The first pump unit 521 as the first pump according to claim 2, and pumps the fuel outside the sub-tank 4 into the sub tank 4 It is comprised from the 2nd pump part 522 as a 2nd pump of description, and the electric motor part 523 which drives the 1st, 2nd pump parts 521 and 522.

  The first and second pump sections 521 and 522 are each formed with a flow path, and one impeller 524 is accommodated in each flow path. The impeller 524 has blade portions formed at positions corresponding to the first and second pump portions 521 and 522, and is rotationally driven by the electric motor portion 523.

  The case 51 houses a fuel filter 53 and a pressure regulator 54 in addition to the fuel pump 52. The fuel filter 53 is a filter medium formed in an annular shape so as to surround the outer periphery of the fuel pump 52, and filters the fuel discharged from the first pump unit 521. The pressure regulator 54 adjusts the pressure of the fuel filtered by the fuel filter 53.

  A first suction passage 55 having a first suction port 551 is connected to the upstream side of the first pump portion 521. The first suction port 551 is provided with a first suction filter 58 formed in a bag shape. When the first pump unit 521 is operated by the electric motor unit 523, a suction force is generated in the first pump unit 521. The suction force causes the fuel in the sub tank 4 to be sucked into the first pump unit 521 and then discharged from above the fuel pump 52. The fuel discharged from the fuel pump 52 is filtered by the fuel filter 53, and then the pressure is adjusted by the pressure regulator 54 and discharged from the first discharge port 56. The fuel discharged from the first discharge port 56 is supplied to the internal combustion engine outside the fuel tank 2 through the hose 32 and the fuel discharge pipe 31. When the pressure of the fuel discharged from the first pump unit 521 exceeds a predetermined value, the excess pressure fuel flows out from a drain port (not shown) of the pressure regulator 54 and returns into the sub tank 4.

  A second suction passage 57 having a second suction port 571 is connected to the upstream side of the second pump unit 522. A partition wall 414 surrounding the first opening 413 and the check valve 46 is provided on the inner wall surface of the bottom 41 of the sub tank 4, and the second suction port 571 side of the second suction passage 57 is inserted into the partition wall 414. Yes. An O-ring is provided between the partition wall 414 and the second suction passage 57. Since the check valve 46 is provided at the bottom 41 of the sub tank 4, a simple structure can be used, and the fuel pump module 1 can be made inexpensive.

  A second suction filter 59 for filtering the fuel flowing into the first opening 413 is attached to the outer wall surface 411 of the bottom 41. The second suction filter 59 is made of a plate-like non-woven fabric, and is attached to the sub tank 4 by pressing the filter 59 against the outer wall surface 411 with the plate 6 as an attachment plate according to the claims. Moreover, since the 2nd suction filter 59 consists of a plate-shaped nonwoven fabric, a fuel can be filtered three-dimensionally and filtration efficiency improves.

  In the present embodiment, the second suction filter 59 is pressed against the outer wall surface 411 by the plate 6 and the second suction filter 59 is attached to the sub tank 4, so that the filter medium can be processed into a bag shape as in the prior art. There is no need to form a hole to which the suction port is attached to the filter medium. For this reason, the structure of the second suction filter 59 can be simplified, and the fuel pump module 1 can be manufactured at low cost. In the present embodiment, the second suction filter 59 is manufactured by cutting a lump of nonwoven fabric.

  In addition, the nonwoven fabric used for the 2nd suction filter 59 is comprised from what made the fiber of polyester, nylon, a polypropylene, or polyacetylene. These materials have a relatively high durability against fuel. By using a nonwoven fabric made of these materials for the second suction filter 59, the life of the fuel pump module 1 can be extended.

  Further, when fuel is passed through the second suction filter 59, an oil film is formed on the upstream side. Since the oil film has a water-repellent effect, it is possible to prevent water from flowing into the sub tank 4. In the present embodiment, since the check valve 46 is provided between the second pump part 522 and the second suction filter 59, it is possible to prevent the check valve 46 from adhering to the bottom 41 of the sub tank 4 due to freezing of moisture. Can be suppressed.

  In addition, the first opening 413 may be formed in the side wall 42, but the bottom 41 is preferable. By forming the first opening 413 in the bottom 41, the fuel can be pumped into the sub tank 4 even if the remaining amount of fuel in the fuel tank 2 decreases.

  The plate 6 is formed in a substantially disk shape, and has an engagement hole 62 that engages with a plurality of engagement protrusions 416 extending downward from the outer wall surface 411 of the bottom 41. The plate 6 is fixed to the sub tank 4 by engaging the engagement hole 62 with the engagement protrusion 416.

  The number of the engagement protrusions 416 and the engagement holes 62 is determined when the second suction filter 59 is sandwiched between the plate 6 and the outer wall surface 411 and the engagement protrusions 416 and the engagement holes 62 are engaged. Any number can be used as long as it can secure a holding force enough to prevent the engagement holes 62 from being detached from the engagement protrusions 416 by the repulsive force generated in the second suction filter 59. The intervals between the engaging protrusions 416 should be as equal as possible, so that the plate 6 can be stably fixed to the sub tank 4.

  FIG. 2 shows an arrow view in the II direction in FIG. As shown in FIG. 2, the plate 6 is formed with a second opening 61 serving as a second communication path according to claim 2, wherein the inner surface facing the outer wall surface 411 and the outer surface opposite to the outer wall surface 411 are communicated. ing. Since the second opening 61 faces the end surface of the second suction filter 59 in the plate thickness direction, the effective filtration area of the second suction filter 59 can be increased.

  FIG. 3 shows a state where the plate 6 and the second suction filter 59 are removed from the bottom 41. On the outer wall surface 411 of the bottom portion 41, an annular protrusion 415 is formed as a first annular protrusion according to the claim that extends toward the inner surface of the plate 6. As shown in FIG. 3, the annular protrusion 415 is located on the inner peripheral side with respect to the engagement protrusion 416 and when the plate 6 is attached to the sub tank 4, the first opening 413 formed in the bottom 41. And the 2nd opening part 61 formed in the plate 6 is formed so that it may be arrange | positioned at the inner peripheral side.

  When the plate 6 is attached to the sub-tank 4, the annular protrusion 415 presses the second suction filter 59 against the inner surface of the plate 6 at its distal end and compresses it. Thereby, it is possible to suppress the fuel outside the sub tank 4 from entering from the side surface of the second suction filter 59. As a result, the fuel passes through the space between the outer wall surface 411 and the second suction filter 59 and is sucked into the first opening 413, that is, the fuel does not pass through the second suction filter 59 and the first opening. Since suction to 413 can be suppressed, the reliability of the fuel pump module 1 is improved.

  Here, when the second suction filter 59 attached to the outer wall surface 411 operates the second pump unit 522 and sucks the fuel outside the sub tank 4, the second suction filter 59 tries to adhere to the outer wall surface 411 by the sucked fuel. When the second suction filter 59 is brought into close contact with the first opening 413, the flow path of the fuel flowing through the second suction filter 59 despite the fact that the second opening 61 is formed in the plate 6 and the effective filtration area is increased. Becomes narrow and the effective filtration area decreases.

  Here, in this embodiment, a plurality of ribs 417 as the raised portions described in the claims are formed on the outer wall surface 411 (see FIGS. 1 and 3). By this rib 417, a gap can be formed between the outer wall surface 411 and the second suction filter 59, and the reduction of the effective filtration area can be suppressed.

  The ribs 417 are formed radially from the first opening 413 as shown in FIG. For this reason, a flow path toward the first opening 413 is formed between the outer wall surface 411 and the second suction filter 59 by the adjacent rib 417. As a result, the fuel filtered by the second suction filter 59 can flow into the first opening 413 without being blocked by the ribs 417.

  When the second pump unit 522 is operated by the electric motor unit 523, a suction force is generated in the second pump unit 522. Due to the suction force, the fuel outside the sub tank 4 is sucked into the second pump portion 522 via the second opening 61, the second suction filter 59, the first opening 413, the check valve 46, and the second suction passage 57. Thereafter, the liquid is discharged from the second discharge port 572 formed in the second pump unit 522 and pumped into the sub tank 4.

  FIG. 4 shows a state where the second suction filter 59 and the plate 6 are attached to the sub tank 4. As shown in FIG. 4, the second suction filter 59 and the plate 6 are attached with the bottom 41 of the sub tank 4 facing upward.

  First, the second suction filter 59 is attached to the bottom 41 of the sub tank 4. Specifically, the worker or the work machine places the end surface of the second suction filter 59 in the plate thickness direction on the annular protrusion 415 formed on the bottom 41. At this time, the tip of the annular protrusion 415 is in contact with the end face of the second suction filter 59 over the entire circumference.

  As shown in FIG. 4, the height of the engaging protrusion 416 is higher than the height of the annular protrusion 415. For this reason, the radial position of the second suction filter 59 can be easily determined by the engaging protrusion 416.

  Next, the worker or the work machine puts the plate 6 on the second suction filter 59, engages the engagement protrusion 416 with the engagement hole 62 formed in the plate 6, and attaches the plate 6 to the sub tank 4. Fix it. The outer diameter of the distal end portion of the engagement protrusion 416 is larger than the inner diameter of the engagement hole 62. Since the distal end portion of the engagement projection portion 416 is formed to be elastically deformable, the distal end portion of the engagement projection portion 416 can pass through the engagement hole 62. Since the tip portion returns to the original outer diameter again after passing through the engagement hole 62, the plate 6 can be fixed to the sub tank 4.

  In the present embodiment, the second pump unit 522 is driven by the electric motor unit 523, but the drive source is not limited to this. For example, a jet pump using a fuel flow discharged from the first pump unit 521 may be used.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view of a main part of the fuel pump module according to the second embodiment.

  As shown in FIG. 5, an annular protrusion 415 a is formed on the inner side surface of the plate 6 as the second annular protrusion described in the claim extending toward the outer wall surface 411 of the bottom 41 of the sub tank 4. Thus, even if the place where the annular protrusion 415a is formed is formed on the inner surface of the plate 6, the engagement hole 62 of the plate 6 is engaged with the engagement protrusion 416 formed on the outer wall surface 411. Thus, the second suction filter 59 can be compressed at the tip of the annular protrusion 415a, and the intrusion of fuel from the side surface of the second suction filter 59 can be suppressed.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a cross-sectional view of a main part of the fuel pump module according to the third embodiment. FIG. 7 is a view taken in the direction of arrow VII in FIG.

  As shown in FIG. 7, the second opening 61 formed in the plate 6 of the first embodiment is not formed in the plate 6 a that fixes the second suction filter 59 to be pressed against the outer wall surface 411. . Only the engagement hole 62 with which the engagement protrusion part 416 of the outer wall surface 411 engages is formed in the plate 6a. Moreover, the rib 417 which was formed in the outer wall surface 411 of 1st Embodiment is not formed, but the outer wall surface 411 is a plane. As shown in FIG. 6, the fuel outside the sub tank 4 enters from the side surface of the second suction filter 59 and flows into the first opening 413 through the inside of the second suction filter 59. Even with such a configuration, since the structure of the second suction filter 59 attached to the sub tank 4 can be simplified, the fuel pump module 1 can be manufactured at low cost.

It is sectional drawing which shows the fuel pump module by 1st Embodiment of this invention. It is an II direction arrow line view of FIG. It is a top view of the bottom part of the sub tank of the state which removed the plate and the 2nd suction filter from the fuel pump module of FIG. FIG. 2 is an exploded cross-sectional view of a sub tank, a second suction filter, and a plate in FIG. 1. It is principal part sectional drawing of the fuel pump module by 2nd Embodiment of this invention. It is principal part sectional drawing of the fuel pump module by 3rd Embodiment of this invention. It is a VII direction arrow line view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel pump module 2 Fuel tank 21 Opening part 22 Bottom face 3 Flange 4 Sub tank 41 Bottom part (wall part)
411 outer wall surface 413 first opening (first communication path)
414 Partition 415 Annular projection (first annular projection)
416 Engagement protrusion 417 Rib (protrusion)
42 Side wall (wall)
46 Check valve 5 Pump unit 51 Case 52 Fuel pump 521 First pump section (first pump)
522 Second pump section (second pump)
523 Electric motor portion 57 Second suction passage 571 Second suction port 58 First suction filter 59 Second suction filter (filter medium)
6 Plate (Mounting plate)
61 Second opening (second communication path)
62 engagement hole

Claims (12)

A sub-tank housed in a fuel tank, having a first communication passage in the wall portion that communicates the inside and the outside, and storing fuel in the inside;
A first pump housed in the sub-tank, sucking the fuel inside the sub-tank and supplying it to the outside of the fuel tank;
A second pump housed in the sub-tank and connected to the first communication path, and pumps the fuel outside the sub-tank into the sub-tank through the first communication path;
A plate-like filter medium that is provided on the outer wall surface of the bottom of the wall portion of the sub tank and filters the fuel flowing into the first communication path;
It has engaging holes, wherein the said bottom surface of the lower between the bottom and the outer wall surface of the fuel tank is disposed via a gap, in a state of pressing the filter medium from below the outer wall surface, the sub-tank An attachment plate for attaching the filter medium to the sub-tank by engaging with a tip portion that is formed to be elastically deformable and that passes through the engagement hole among the engagement protrusions extending downward from the bottom of
A fuel pump module comprising: The mounting plate has a second communication path that communicates an inner surface facing the outer wall surface and an outer surface opposite to the inner surface.
When the attachment plate is attached to the outer wall surface, the outer wall surface extends toward the inner surface so that the first communication path and the second communication path are arranged on the inner side, and a tip portion thereof. The fuel pump module according to claim 1, wherein a first annular protrusion that compresses the filter medium is formed between the inner surface and the inner surface.   The fuel pump module according to claim 2, wherein a protruding portion is formed on the outer wall surface on the inner side of the first annular projecting portion. The mounting plate has a second communication path that communicates an inner surface facing the outer wall surface and an outer surface opposite to the inner surface.
When the attachment plate is attached to the outer wall surface, the inner side surface extends toward the outer wall surface so that the first communication path and the second communication path are arranged on the inner side, 2. The fuel pump module according to claim 1, wherein a second annular protrusion for compressing the filter medium is formed between the outer wall surface and the outer wall surface.   The fuel pump module according to claim 4, wherein a protruding portion is formed on the outer wall surface inside the second annular protrusion.   6. The fuel pump module according to claim 3, wherein a plurality of the raised portions are formed so as to spread radially from the first communication path.   The fuel pump module according to any one of claims 1 to 6, wherein the first communication passage is formed in a bottom portion of the sub tank.   8. A check valve is provided between the second pump and the filter medium, wherein a check valve that allows fuel to flow from the filter medium to the second pump is provided. The fuel pump module according to item. The fuel pump module according to claim 8, wherein the check valve is attached to a bottom portion of the sub tank.   The fuel pump module according to any one of claims 1 to 9, wherein the filter medium is a non-woven fabric.   The fuel filter module according to any one of claims 1 to 9, wherein the filter medium is manufactured by cutting a lump of nonwoven fabric.   The fuel filter module according to any one of claims 1 to 11, wherein the filter medium is made of polyester, nylon, polypropylene, or polyacetylene.

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