JP2008082263A - Fuel supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a fuel supply device without deteriorating the efficiency of the fuel supply device. <P>SOLUTION: A casing 14 stores a fuel pump in such a manner that an axial direction of the fuel pipe is perpendicular to a plate 22. A filter 18 is arranged so that a filter part 48 is exposed in a fuel tank, and is attached to the casing 14 so that its longitudinal direction is perpendicular to the plate 22. Further, the casing 14 and the filter 18 are arranged so as to be housed in a surface of the plate 22 when they are viewed from the vertically upper side of the plate 22 (upper side of Fig. 1). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fuel supply apparatus. Specifically, the present invention relates to a fuel supply device that supplies fuel in a fuel tank to an internal combustion engine.

A fuel supply device that supplies fuel in a fuel tank to an internal combustion engine is disclosed in Patent Document 1, for example. The fuel supply device of Patent Document 1 communicates a fuel pump, an in-tank filter connected to the fuel pump suction port, a fuel filter connected to the discharge port of the fuel pump, a fuel filter, and a fuel supply pipe. A fuel delivery pipe is provided. The in-tank filter is made of woven fabric or the like. The fuel filter includes a filtration member made of a nonwoven fabric or the like and a casing that accommodates the filtration member.
In this fuel supply device, when the fuel pump is driven, the fuel in the fuel tank passes through the in-tank filter and is sucked into the fuel pump from the suction port. When the fuel passes through the in-tank filter, relatively large foreign matters mixed in the fuel are removed. The fuel whose pressure has been increased by the fuel pump is discharged from the discharge port to the fuel filter. Small foreign matters in the fuel discharged to the fuel filter are removed by the filtering member in the casing. The fuel from which the foreign matter has been removed is supplied to the internal combustion engine through the fuel delivery pipe and the fuel supply pipe.

When the volume of the fuel tank is small, such as a fuel tank mounted on a motorcycle or the like, the fuel supply device accommodated in the fuel tank must be downsized. The fuel supply device of Patent Document 1 includes two types of filters, a fuel filter and an in-tank filter. For this reason, if one of these two types of filters can be eliminated, the fuel supply device can be reduced in size accordingly.
When the in-tank filter is removed from the fuel supply device of Patent Document 1, a large foreign matter flows into the casing of the fuel filter. For this reason, foreign matter accumulates in the casing in a short time, and it becomes difficult for the fuel to pass through the fuel filter. This reduces the efficiency of the fuel supply device. Further, if the in-tank filter is removed, a large foreign substance flows into the fuel pump, which may damage the fuel pump.
On the other hand, when the fuel filter is removed from the fuel supply apparatus of Patent Document 1, small foreign matters contained in the fuel cannot be removed. For this reason, there is a possibility that small foreign matters are mixed in the fuel supplied to the internal combustion engine, and a failure occurs in the fuel supply to the internal combustion engine. Moreover, the in-tank filter of patent document 1 is extended and arrange | positioned in the orthogonal | vertical direction with respect to the axial direction of a fuel pump, and will enlarge a fuel supply apparatus to radial direction. There is a fuel supply device in which a filter on the suction port side is accommodated in a casing so that the filter does not spread in the radial direction of the fuel pump (for example, Patent Document 2). However, when the filter on the suction port side is housed in the casing, the filter on the suction port side removes large foreign matter contained in the fuel, so foreign matter accumulates in the casing in a short time, reducing the efficiency of the fuel supply device. I will let you.

JP 10-43513 A JP 2001-50129 A

  The present invention has been made in view of the circumstances described above, and an object of the present invention is to stably supply fuel to an internal combustion engine and to provide a fuel supply device without reducing the efficiency of the fuel supply device. It is to provide a technology that can be miniaturized.

A fuel supply apparatus according to the present invention is a fuel supply apparatus that supplies fuel in a fuel tank to an internal combustion engine, and includes a plate member that closes an opening provided at the bottom of the fuel tank, and an attachment of the plate member inside the fuel tank. A casing erected on the surface, a fuel pump accommodated in the casing, and a filter attached to the suction port of the fuel pump are provided. The filter is a bag-shaped filter member made of nonwoven fabric, a communication member that communicates the internal space of the filter member and the suction port of the fuel pump, and is accommodated in the internal space of the filter member and holds the filter member in a bag shape. It has a frame member, the filter is arranged in parallel with the casing, and its outer surface is exposed in the fuel tank.
In this fuel supply apparatus, since the filter is arranged in parallel with the casing, the filter is not arranged so as to spread in the direction perpendicular to the axial direction of the casing. For this reason, it can prevent that a fuel supply apparatus enlarges in the direction perpendicular | vertical with respect to the axial direction of a casing.
In addition, since the filter is attached to the suction port, foreign matters can be removed from the fuel flowing into the fuel pump. Thereby, damage to the fuel pump can be prevented. Since the filter removes foreign matters in the fuel with a filtering member made of a nonwoven fabric, even small foreign matters in the fuel can be removed. Therefore, fuel can be stably supplied to the internal combustion engine. Moreover, since even small foreign matters in the fuel can be removed, it is not necessary to provide a filter on the discharge port side of the fuel pump, and the fuel supply device can be downsized.
Further, since the filter member of the filter is exposed in the fuel tank, even if foreign matter adheres to the surface of the filter member, the foreign matter does not accumulate in the casing. For this reason, the fall of the filtration capability of a filter is suppressed and the efficiency of a fuel supply apparatus can be maintained highly. Further, since the frame member holds the shape of the filter member from the inside of the filter member, the filter member can maintain the initial shape even if foreign matter adheres to the filter member.

  The casing and the filter are preferably arranged in a space formed by moving the mounting surface of the plate member in a direction perpendicular to the mounting surface. In this configuration, the casing and the filter member are arranged so that the fuel supply device does not increase in the direction perpendicular to the axial direction of the mounting surface of the plate member. Thereby, the mountability to the fuel tank of a fuel supply apparatus can be improved.

One end of the filter is located near the mounting surface of the plate member, while the distance from the mounting surface to the other end of the filter is substantially the same as the distance from the mounting surface to the end of the fuel pump opposite to the plate member It is preferable that
By arranging one end of the filter in the vicinity of the mounting surface of the plate member, the fuel at the bottom of the fuel tank can be sucked into the filter. Further, the position of the other end of the filter (specifically, the position in the vertical direction with respect to the plate member) is substantially the same as the position of the end of the fuel pump on the side opposite to the plate member (specifically, the position in the vertical direction with respect to the plate member). Therefore, even when a pressure regulating member for adjusting the pressure of fuel discharged from the fuel pump is arranged on the end side on the side opposite to the plate member of the fuel pump, what is an obstacle to the arrangement of the pressure regulating member by the filter? In addition, an increase in the size of the fuel supply device can be suppressed.

The fuel supply device of the present invention is connected to a discharge port of a fuel pump, adjusts the pressure of fuel discharged from the discharge port, and discharges surplus fuel into the fuel tank, and is connected to the pressure adjustment member. A fuel passage that guides the fuel regulated by the pressure regulating member to the outside of the fuel tank, and a fuel diffusion portion that diffuses surplus fuel discharged from the pressure regulating member into the fuel tank can be further provided. And it is preferable that a fuel diffusion part diffuses a fuel so that at least one part of the surplus fuel discharged from the pressure regulation member may flow toward a filter.
The fuel discharged from the pressure regulating member into the fuel tank is boosted by the pressure regulating member. Therefore, by applying the pressurized fuel to the filter, the foreign matter adhering to the filter surface can be removed by filtering the fuel. At this time, the pressurized fuel is diffused in the fuel diffusion portion, and at least a part of the diffused fuel flows toward the filter, so that a wide range of the filter surface is washed with the diffused fuel. As a result, it is possible to prevent a decrease in the efficiency of the fuel supply device due to clogging of the filter. Moreover, the lifetime of the filter can be extended.

Another fuel supply apparatus of the present invention is a fuel supply apparatus that supplies fuel in a fuel tank to an internal combustion engine. The fuel supply device includes a plate member that closes an opening provided in a bottom portion of a fuel tank, a casing that is erected on a mounting surface inside the fuel tank of the plate member, a fuel pump that is accommodated in the casing, a fuel A filter attached to the suction port of the pump and having a filter member made of nonwoven fabric, and a pressure regulator connected to the discharge port of the fuel pump to adjust the pressure of the discharged fuel and discharge excess fuel into the fuel tank The fuel, the fuel passage for guiding the fuel regulated by the pressure regulating member to the outside of the fuel tank, and the fuel so that at least a part of the surplus fuel discharged from the pressure regulating member into the fuel tank flows toward the filter. And a fuel diffusing section for diffusing.
The pressure regulating member discharges fuel boosted by the fuel pump into the fuel tank. The fuel discharged from the pressure adjusting member is diffused by the fuel diffusing section, and the diffused fuel is allowed to flow toward the filter, so that foreign matters adhering to the surface of the filter can be effectively removed.
The fuel diffusion portion can be a convex surface protruding from the outer surface of the fuel passage. According to this configuration, the fuel diffusion portion can be easily provided and can be manufactured at low cost.

The main features of the techniques described in the following examples are listed.
(Mode 1) The casing accommodates the fuel pump such that the axial direction of the fuel pump is perpendicular to the mounting surface of the plate member.
(Mode 2) The casing includes a fuel suction port, a fuel discharge port, a housing portion that houses the fuel pump, a fuel passage connected to the fuel discharge port, and a fuel diffusion portion that protrudes from the outer peripheral surface of the fuel passage. These are integrally formed.
(Mode 3) The pressure adjusting member has a fuel discharge port for discharging surplus fuel. The fuel diffusion portion has a flat plate shape and is disposed at a position separated from the fuel discharge port of the pressure adjusting member by a predetermined distance.

An embodiment of a fuel supply apparatus embodying the present invention will be described with reference to the drawings. FIG. 1 is a front view of the fuel supply apparatus 10 of this embodiment, and FIG. 2 is a side view of the fuel supply apparatus 10 as viewed from the right side of FIG.
The fuel supply device 10 of this embodiment is installed in a fuel tank 1 of a motorcycle and is used to supply fuel in the fuel tank 1 to an internal combustion engine (engine) (not shown). As shown in the drawing, the fuel supply device 10 is inserted and attached to the opening 1 a formed at the bottom of the fuel tank 1 from the outside of the fuel tank 1. The fuel supply device 10 includes a set plate 12, a casing 14, a pressure regulator 16, a fuel filter 18 and the like.
The set plate 12 has a disk-shaped plate 22. A cylindrical fitting portion 24 is formed on one surface of the plate 22 (the upper surface in FIG. 1). On the upper surface of the plate 22, a rubber gasket 23 that wraps around the fitting portion 24 is fixed outside the outer peripheral surface 24 a of the fitting portion 24. On the other surface of the plate 22, a fuel discharge port 20 through which fuel discharged from a fuel pump 33 (shown in FIG. 6) is guided and a connection terminal 26 for supplying power to the fuel pump and the like are attached. . One end of a fuel supply pipe (not shown) is connected to the fuel discharge port 20, and the other end of the fuel supply pipe is connected to an internal combustion engine (engine or the like). The fuel discharged from the fuel pump 33 is supplied from the fuel discharge port 20 to the internal combustion engine through the fuel supply pipe. The set plate 12 is attached to the fuel tank 1 in a state in which the outer peripheral surface 24a of the fitting portion 24 is fitted to the opening 1a of the fuel tank 1. The inner diameter of the gasket 23 is larger than the inner diameter of the opening 1 a of the fuel tank 1. Therefore, the upper and lower positional relationship between the fuel tank 1 and the set plate 12 is determined by the upper surface (the upper end portion shown in FIG. 1) of the gasket 23 being in contact with the outer surface of the fuel tank 1.

A casing 14 is attached to the plate 22 of the set plate 12 on the same side as the fitting portion 24. The casing 14 is formed by integrally molding a housing portion 58 that houses the fuel pump 33, a fuel inlet 30, a fuel outlet 32, a fuel passage 52, and a flat plate 54.
The accommodating part 58 is formed in a cylindrical shape. When the casing 14 is attached to the plate 22, the accommodating portion 58 is in a state perpendicular to the upper surface of the plate 22. The accommodating portion 58 accommodates a well-known Wesco-type fuel pump 33 (shown in FIG. 6). As shown in FIG. 6, when the fuel pump 33 is accommodated in the accommodating portion 58, the longitudinal axis of the fuel pump 33 is perpendicular to the upper surface of the plate 22. Further, in a state where the fuel pump 33 is housed in the housing portion 58, the suction port 33a (shown in FIG. 6) of the fuel pump 33 is positioned on the lower side, and the discharge port 33b (shown in FIG. 6) of the fuel pump 33 is located. Located on the upper side. The fuel pump 33 is connected to the connection terminal 26 via a conducting wire 41. The fuel pump 33 is supplied with electric power from an external power source via the conductor 41 and the connection terminal 26.
A fuel suction port 30 (also shown in FIG. 6) is formed at the lower end of the casing 14 (lower end of the accommodating portion 58), and the fuel discharge port 32 (FIG. 6) is formed at the upper end of the casing 14 (upper end of the accommodating portion 58). Are formed). The fuel filter 18 described in detail later is connected to the suction port 33a of the fuel pump 33 via the fuel suction port 30, and the fuel discharge port 32 is connected to the discharge port 33b of the fuel pump 33.
A float 36 is rotatably attached to the side surface of the casing 14 via an arm 34. A sensor 38 is disposed at an end of the arm 34 on the casing side (that is, an end opposite to the float 36), and the sensor 38 is fixed to the casing 14. A terminal 40 is connected to the sensor 38. The terminal 40 is connected to an external power source via the conductive wire 42 and the connection terminal 26, and power is supplied to the sensor 38 from the external power source. The float 36 floats on the fuel in the fuel tank 1. That is, the float 36 rotates with respect to the casing 14 as the liquid level of the fuel in the fuel tank 1 moves up and down. The sensor 38 detects the rotation angle of the arm 34. The sensor 38 converts the rotation angle into a signal and transmits it to a control device (not shown). Thereby, the control apparatus can calculate the fuel remaining amount in the fuel tank.

The filter 18 will be described with reference to FIGS. 3 is a front view of the filter 18 viewed from the casing 14 side (right side of FIG. 1), FIG. 4 is a sectional view taken along the line IV-IV shown in FIG. 3, and FIG. 5 is a view of the filter frame viewed from the casing side. It is a front view. As shown in FIGS. 3 to 5, the filter 18 includes a connection member 44, a frame 46, and a filtration member 48.
The connecting member 44 is a member that connects the fuel pump 33 and the filter 18 (that is, the connecting member 44 corresponds to a communicating member in the claims). A fuel delivery port 50 that opens upward is formed at one end of the connection member 44. The other end of the connection member 44 is provided with a connection port 51 that opens to the side (left side in FIG. 4). A connection port 47 provided at the lower end of the frame 46 is fitted into the connection port 51. As shown in FIG. 6, the connecting member 44 is inserted into the casing 14 (specifically, inside the accommodating portion 58) from the fuel inlet 30 of the casing 14, and the inlet of the fuel pump 33 is connected to the fuel delivery port 50 of the connecting member 44. 33a is press-fitted. Thereby, the fuel pump 33 and the filter 18 are connected.
As shown in FIG. 5, the frame 46 has a lattice-shaped frame 45 and a connection port 47 attached to the frame 45. A plurality of convex portions 46 a are formed on one surface of the frame 45 (surface on the side opposite to the connection member 44). When the filter 18 is connected to the fuel pump 33, the longitudinal direction of the frame 46 is perpendicular to the plate 22. The connection port 47 is attached to the lower end of the frame 45. As described above, the connection port 51 of the connection member 44 is connected to the connection port 47. The frame 46 is accommodated in the filter member 48.
The filter member 48 is made into a bag shape using a nonwoven fabric. An opening is formed in the filter member 48, and a connection port 47 of the frame 46 is disposed in this opening. When the connection port 51 of the connection member 44 is connected to the connection port 47, the edge of the opening of the filtration member 48 is sandwiched between the frame 46 and the connection member 44. Thus, the filter member 48 is supported by the frame 46 so as not to be loosened, and fuel in the filter member 48 is prevented from leaking from the opening of the filter member 48. A pair of surfaces of the filtering member 48 facing each other across the frame 46 are separated from each other by the height of the convex portion 46 a (height in the direction perpendicular to the frame 46) by the convex portion 46 a of the frame 46. Thereby, when the fuel pump sucks the fuel, it is possible to prevent the pair of opposed surfaces of the filtering member 48 from coming into close contact with each other due to the suction pressure. The filter member 48 is disposed so as to be within the plane of the plate 22 when viewed from the upper side of the fuel supply device 10 (that is, the upper side in FIG. 1) in a state where the frame 46 is accommodated.

  As shown in FIG. 6, the fuel discharge port 32 of the casing 14 is connected to one end of a cylindrical fuel passage 52 refracted in an L shape. The pressure regulator 16 is connected to one end of the fuel passage 52. The pressure regulator 16 adjusts the pressure of the fuel discharged from the fuel pump 33 and discharges surplus fuel generated thereby into the fuel tank 1. As well shown in FIG. 1, the pressure regulator 16 is disposed above the filter 18. The pressure regulator 16 includes a fuel discharge port 16a that discharges surplus fuel. The fuel discharge port 16 a is disposed so as to discharge fuel in a direction parallel to the fuel passage 52. A rectangular flat plate 54 projects from the outer peripheral surface of the fuel passage 52. The flat plate 54 faces the fuel discharge port 16a of the pressure regulator 16 and is separated from the fuel discharge port 16a by a predetermined distance. The fuel discharge port 20 is connected to the other end of the fuel passage 52 (the lower end in FIG. 6) via a communication passage 56.

  Next, the operation of the fuel supply device 10 will be described. When power is supplied from an external power source to the fuel pump 33, the fuel pump 33 housed in the casing 14 is driven. When the fuel pump 33 is driven, the fuel in the fuel tank 1 is sucked into the filter member 48 of the filter 18. Thereby, the fuel in the fuel tank 1 flows through the filter member 48 from the outside to the inside. At this time, the foreign matter contained in the fuel adheres to the surface of the filter member 48, and the foreign matter is removed from the fuel sucked by the fuel pump 33. Since the filter member 48 is made of a nonwoven fabric, even fine foreign matters in the fuel can be removed. The fuel that has passed through the filter member 48 is sucked into the fuel pump 33 from the suction port 33 a through the opening 50 of the connection member 44.

  The fuel sucked into the fuel pump 33 is pressurized by the fuel pump 33 and discharged from the discharge port 33 b of the fuel pump 33 to the fuel discharge port 32. The fuel that has flowed into the fuel discharge port 32 flows into the pressure regulator 16 through the fuel discharge port 32. The pressure regulator 16 regulates the fuel pressure boosted by the fuel pump 33 to a predetermined pressure corresponding to the operating state of the internal combustion engine. The pressure-adjusted fuel is supplied from the fuel discharge port 20 to the internal combustion engine via the fuel passage 52 and the communication passage 56. Further, the pressure regulator 16 discharges the excessively supplied fuel from the fuel pump 33 to the outside of the casing 14 from the fuel discharge port 16a when adjusting the pressure of the fuel.

Excess fuel discharged from the fuel discharge port 16 a flows toward a flat plate 54 protruding from the outer peripheral surface of the fuel passage 52. Excess fuel discharged from the pressure regulator 16 is boosted by a fuel pump. Therefore, the fuel that has collided with the flat plate 54 is diffused into the fuel tank 1. A part of the diffused fuel flows toward the filter 18 disposed below the pressure regulator 16. The fuel discharged from the pressure regulator 16 is fuel from which foreign matter has been removed by the filter 18. Accordingly, the extraneous fuel flowing toward the filter 18 removes foreign matter adhering to the surface of the filter member 48 of the filter 18. The nonwoven fabric that is the material of the filter member 48 has high foreign matter removal performance, and can remove even small foreign matters mixed in the fuel. On the other hand, foreign matter removed from the fuel may adhere strongly to the surface of the nonwoven fabric. However, the fuel adhering to the filter member 48 can be removed by flowing the pressure-increased fuel from which foreign substances have been removed on the surface of the filter member 48. Thereby, even if the filter member 48 is made of a nonwoven fabric, it is possible to prevent a decrease in pump efficiency of the fuel pump 33 due to clogging of the nonwoven fabric. Moreover, the lifetime of the filter member 48 can be lengthened.
Furthermore, in the fuel supply apparatus 10 of the present embodiment, the filter 18 connected to the suction side of the fuel pump 33 is a nonwoven fabric, and even small foreign matters are removed by the filter 18. For this reason, a filter disposed on the discharge port side of the fuel pump, which has been conventionally required, is unnecessary, and the fuel supply device 10 is significantly reduced in size.

The frame 46 of the filter 18 holds the filtering member 48 without slack, and the pair of opposed surfaces of the filtering member 48 are held apart by the convex portions 46 a of the frame 46. Thereby, even if the filtration member 48 receives pressure from the fuel sucked into the fuel pump 33, the pair of opposed surfaces are not in close contact with each other, and the shape of the filtration member 48 can be maintained. For this reason, the fuel in the fuel tank 1 can be stably sucked into the filter member 48.
The casing 14 is integrally formed with a housing 58 for housing the fuel pump 33, a fuel inlet 30, a fuel outlet 32, a fuel passage 52 and a flat plate 54. Thereby, the number of parts of the fuel supply apparatus 10 is reduced, and the number of assembly steps of the fuel supply apparatus 10 can be reduced.

In the fuel supply device 10 described above, the flat plate 54 is integrally formed with the fuel passage 52. However, the present invention is not limited to this configuration, and a flat plate formed separately from the fuel passage 52 is attached to the outer peripheral surface of the fuel passage 52. May be. Further, the casing 14 is also integrally formed with the housing portion 58, the fuel passage 52, etc., but may be formed separately.
The filter 18 is arranged so that its longitudinal direction is perpendicular to the plate 22. However, in addition to this, the arrangement and shape of the filter can be changed as appropriate according to the required design specifications. Even in such a case, when the surplus fuel discharged from the pressure regulator 16 is diffused by the flat plate 54 serving as the fuel diffusion portion, it is preferable that a part of the diffused surplus fuel flows toward the filter. For example, the angle of the flat plate 54 with respect to the fuel discharge port 16a may be changed according to the position where the filter is disposed, and the fuel diffusion portion may be a dome shape or a curved surface instead of a flat plate. Further, the fuel diffusing portion may be rotatably supported by the fuel passage 52. For example, the fuel diffusion part may have a rotating shaft fixed to the fuel passage 52, and a flat plate supported rotatably on the rotating shaft may be used. According to this configuration, the fuel can be diffused by rotating the flat plate by the pressure of the fuel discharged from the fuel discharge port 16a. As described above, the fuel diffusion portion can be appropriately changed depending on the filter shape, the mounting position, and the like.

As mentioned above, although the several specific example of this invention was demonstrated in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
In addition, the technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

The front view of a fuel supply apparatus. Same side view. The front view which looked at the filter from the casing side. Sectional drawing of IV-IV of FIG. The front view which looked at the flame | frame of the filter from the casing side. The partial cross section figure of a fuel supply apparatus.

Explanation of symbols

1: Fuel tank 10: Fuel supply device 12: Set plate 14: Casing 16: Pressure regulator 16a: Excess fuel discharge port 18: Filter 20: Fuel supply pipe 44: Connection portion 46: Frame 48: Filtration portion 54: Flat plate

Claims (6)

A fuel supply device for supplying fuel in a fuel tank to an internal combustion engine,
A plate member that closes an opening provided at the bottom of the fuel tank;
A casing erected on the mounting surface inside the fuel tank of the plate member;
A fuel pump housed in the casing;
It has a filter attached to the fuel pump inlet,
The filter is a bag-shaped filter member made of nonwoven fabric, a communication member that communicates the internal space of the filter member and the suction port of the fuel pump, and is accommodated in the internal space of the filter member and holds the filter member in a bag shape. Has a frame member,
A fuel supply device, wherein the filter is arranged in parallel with the casing, and an outer surface thereof is exposed in the fuel tank.   The fuel supply device according to claim 1, wherein the casing and the filter are arranged in a space formed by moving a mounting surface of the plate member in a direction perpendicular to the mounting surface.   One end of the filter is located near the mounting surface of the plate member, while the distance from the mounting surface to the other end of the filter is substantially the same as the distance from the mounting surface to the end of the fuel pump opposite to the plate member The fuel supply device according to claim 1, wherein:   A pressure adjusting member that is connected to the discharge port of the fuel pump, adjusts the pressure of the fuel discharged from the discharge port and discharges surplus fuel into the fuel tank, and is adjusted by the pressure adjusting member connected to the pressure adjusting member. A fuel passage for guiding fuel to the outside of the fuel tank; and a fuel diffusion portion for diffusing surplus fuel discharged from the pressure regulating member into the fuel tank, wherein the fuel diffusion portion is surplus fuel discharged from the pressure regulating member. The fuel supply device according to claim 3, wherein the fuel is diffused so that at least a part of the fuel flows toward the filter. A fuel supply device for supplying fuel in a fuel tank to an internal combustion engine,
A plate member that closes an opening provided at the bottom of the fuel tank;
A casing erected on the mounting surface inside the fuel tank of the plate member;
A fuel pump housed in the casing;
A filter attached to the suction port of the fuel pump and having a filter member made of nonwoven fabric;
A pressure regulating member that is connected to the discharge port of the fuel pump, adjusts the pressure of the discharged fuel, and discharges surplus fuel into the fuel tank;
A fuel passage for guiding the fuel regulated by the pressure regulating member to the outside of the fuel tank;
And a fuel diffusing section for diffusing the fuel so that at least part of the surplus fuel discharged from the pressure adjusting member into the fuel tank flows toward the filter.   6. The fuel supply device according to claim 5, wherein the fuel diffusion portion is a convex surface projecting from the outer surface of the fuel passage.

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