Fuel pump module

Abstract

To provide a return piping system that is low-cost and has a simpler structure. [Solution] The fuel pump module 1 includes a fuel filter 30 for filtering fuel, a fuel pump 10 for pumping the fuel that has passed through the fuel filter 30, a pressure control valve 40 for adjusting the fuel pressure by discharging a portion of the fuel as excess fuel, and a return pipe 50 for guiding the excess fuel to the outer surface of the fuel filter 30. The return pipe 50 includes a first pipe member 51 connected to the pressure control valve 40, a second pipe member 53 extending in a direction intersecting the first pipe member 51, and a connecting mechanism 90 for detachably connecting one end of the second pipe member 53 to one end of the first pipe member 51 so as to support one end of the second pipe member 53 in a cantilevered manner.

Description

Technical Field

[0001] The present disclosure relates to a fuel pump module.

Background Art

[0002] A vehicle equipped with an engine has a fuel supply system that supplies fuel to the engine. The fuel supply system usually has a fuel pump module including a fuel pump disposed in a fuel tank and a fuel filter for filtration. The fuel pump pumps up fuel through the fuel filter and pumps it to the engine.

[0003] Also, the fuel pump module usually has a pressure control valve that adjusts the pressure of the fuel by discharging a part of the pumped fuel from a supply passage. In this case, a return pipe that guides the discharged fuel to the fuel filter may be connected to the pressure control valve. Thereby, it is possible to suppress a shortage of fuel pumped up by the fuel pump when the vehicle body tilts and the contact between the liquid level and the fuel filter is lost. Such a fuel pump module is disclosed in, for example, Japanese Patent Application Laid-Open No. 2013-241884.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] One end of the return pipe described in the above publication is connected to the pressure control valve, and the other end is fixed to the connection port of the fuel filter with the fuel pump. Therefore, since it is necessary to form a fixing structure for the fuel filter in the return pipe, the structure of the mold for forming the return pipe becomes complicated and the cost increases. Therefore, a return pipe with a lower cost and a simpler structure is required. [Means for solving the problem]

[0006] One embodiment of a fuel pump module includes a fuel filter for filtering fuel, a fuel pump for pumping the fuel that has passed through the fuel filter, a pressure control valve for adjusting fuel pressure by discharging a portion of the fuel as excess fuel, and a return pipe for guiding the excess fuel to the outer surface of the fuel filter. The return pipe includes a first pipe member connected to the pressure control valve, a second pipe member extending in a direction intersecting the first pipe member, and a connecting mechanism that detachably connects one end of the second pipe member to one end of the first pipe member so as to support one end of the second pipe member in a cantilevered manner. In this way, the first pipe member supports the second pipe member in a cantilevered manner, eliminating the need for a fixing structure to the fuel filter on the return pipe, resulting in a simple configuration. Furthermore, because the second pipe member is detachable, various second pipe members can be switched and attached to the first pipe member. For example, even if the arrangement or orientation of the fuel filter relative to the pressure control valve is different, excess fuel can be easily supplied to the fuel filter by changing the second pipe member.

[0007] Furthermore, the connecting mechanism has an insertion portion formed in one of the first pipe member and the second pipe member, and an insertion portion formed in the other of the first pipe member and the second pipe member that receives the insertion portion. Therefore, the return piping can be formed with a simple configuration in which one of the pipe members is inserted into the other.

[0008] The connecting mechanism also includes an insertion portion formed in the first pipe member and an insertion portion formed in the second pipe member. This allows the first pipe member to be inserted into the second pipe member, forming a return pipe.

[0009] Furthermore, the insertion part is press-fitted into the part to be inserted so as not to create a gap between them. Therefore, the first pipe member and the second pipe member can be easily connected by press-fitting. In addition, fuel can be supplied to the fuel filter without leaking from the connecting mechanism.

[0010] Furthermore, the connecting mechanism has a claw portion formed on the first pipe member and an engaging piece formed on the second pipe member that snaps onto the claw portion when the insertion part is inserted. Therefore, the snap-fit ​​structure prevents the pipe members from coming apart. In addition, the circumferential positioning of the second pipe member relative to the first pipe member can be easily performed.

[0011] Furthermore, although the fuel filter has a flattened shape and has width in the direction intersecting the direction from the pressure control valve towards the fuel filter, the entire return piping is within the width of the fuel filter. Therefore, for example, when introducing a fuel pump module into the fuel tank, the return piping can be smoothly inserted into the fuel tank if the opening is large enough for the fuel filter to pass through.

[0012] Furthermore, the fuel filter has a recess to avoid interference with the return piping. This recess allows the return piping and fuel filter to be positioned close together without interfering with each other. This enables a more compact fuel pump module configuration. [Brief explanation of the drawing]

[0013] [Figure 1] This is a schematic diagram of a fuel tank equipped with a fuel pump module according to the first embodiment. [Figure 2] Figure 1 is a schematic diagram showing the fuel tank in a tilted position. [Figure 3] This is a perspective view of the fuel pump module. [Figure 4] This is a plan view of the fuel pump module. [Figure 5] This is a side view of the fuel pump module. [Figure 6] This is a bottom view of the fuel pump module. [Figure 7] Figure 4 is a cross-sectional view of the fuel pump module along the line VII-VII. [Figure 8] Figure 4 is a cross-sectional view of the fuel pump module along line VIII-VIII. [Figure 9] This is a perspective view of the return piping. [Figure 10] It is a perspective exploded view of the return pipe. [Figure 11] It is a sectional view taken along line XI-XI of the return pipe in FIG. 9. [Figure 12] It is a bottom view of a fuel pump module of another embodiment. [Figure 13] It is a perspective view of a return pipe of another embodiment. [Figure 14] It is a view showing a state in which the second pipe member in FIG. 13 is press-fitted.

Mode for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. As shown in FIG. 1, the fuel pump module 1 is provided, for example, in a fuel tank 2a of a motorcycle.

[0015] <Fuel tank>[[ID=2六]] As shown in FIG. 1, the fuel tank 2a has, for example, a horizontally long shape that is longer in the horizontal direction than in the height direction. An opening is formed in the upper part of the fuel tank 2a, and a set plate 2b is attached so as to close the opening.

[0016] <Fuel pump module> The fuel pump module 1 has a fuel pump 10 that pumps up fuel. The fuel pump 10 is connected to a fuel filter 30 disposed at the bottom of the fuel tank 2a. The fuel pump 10 sucks the fuel in the fuel tank 2a through the fuel filter 30. The sucked fuel is pumped to an injector 20. The injector 20 injects the pumped fuel into the engine.

[0017] The fuel pump module 1 also has a pressure control valve 40 that adjusts the pressure of the fuel pumped from the fuel pump 10 so that it does not exceed a set pressure. The pressure control valve 40 is configured to return a portion of the pumped fuel to the fuel tank 2a as excess fuel. In this way, the pressure control valve 40 can adjust the fuel pressure. A return pipe 50 is connected to the pressure control valve 40 to guide the excess fuel discharged from the pressure control valve 40 to the fuel filter 30. The excess fuel is discharged through the return pipe 50 toward the upper surface of the fuel filter 30.

[0018] As shown in Figure 2, excess fuel is returned directly to the fuel filter 30 via the return pipe 50. For example, suppose that the tilt of the fuel tank 2a due to the tilt of the vehicle body causes a situation where the fuel does not come into contact with the fuel filter 30. Even in such a case, the excess fuel is returned directly to the fuel filter 30 via the return pipe 50. This makes it easier to draw the excess fuel into the fuel pump 10. As a result, the time during which the fuel pressure is maintained when the fuel filter 30 is not in contact with the stored fuel can be extended as much as possible.

[0019] <Fuel pump> The components of the fuel pump module 1 will be described in detail below. As shown in Figure 7, the fuel pump 10 is a cylindrical device with its axis oriented in the front-rear direction. The fuel pump 10 has a pump section (not shown) that draws in fuel and pumps it to the engine, and a motor section (not shown) that rotates the pump section. The fuel pump 10 has an intake port 11 at one end (rear end) in the axial direction. The fuel pump 10 also has a discharge port 12 at the other end (front end) in the axial direction.

[0020] <Main Housing> As shown in Figure 3, the fuel pump module 1 has a main body housing 60 extending downward from the set plate 2b and a pump holding case 70 connected to the side of the main body housing 60. The fuel pump module 1 also has a discharge port 80 formed on the upper surface of the set plate 2b.

[0021] As shown in Figures 5 and 7, the main housing 60 is a cylindrical member extending in the vertical direction. The main housing 60 is integrally formed in the center of the lower surface of the set plate 2b. An axially extending fuel passage 61 is formed inside the main housing 60. The fuel passage 61 penetrates the set plate 2b vertically and communicates with the pipeline of the discharge port 80.

[0022] The main housing 60 has a pump insertion portion 62 that protrudes from its side toward the rear. The pump insertion portion 62 is generally cylindrical in shape and communicates with the fuel passage 61. The discharge end (front part) of the fuel pump 10 is inserted axially into the pump insertion portion 62. This connects the discharge port 12 of the fuel pump 10 to the fuel passage 61.

[0023] <Pump holding case> As shown in Figures 5 and 7, the pump holding case 70 is a cylindrical member oriented horizontally (front-to-back direction in the figures). The fuel pump 10 is housed inside the pump holding case 70. An engagement portion 72 for attachment to the main housing 60 is formed at the front of the pump holding case 70. The engagement portion 72 is assembled to the outside of the pump insertion portion 62 of the main housing 60 via a snap-fit ​​mechanism (Figure 3). This integrally connects the pump holding case 70 to the main housing 60. The fuel pump 10 is also held in place by the main housing 60.

[0024] An intake port 71 is formed at the rear of the pump holding case 70, protruding toward the rear. The intake port 11 of the fuel pump 10 is connected to the piping of the intake port 71. The connecting pipe 36 of the fuel filter 30, which will be described later, is connected to the protruding end of the intake port 71.

[0025] <Fuel filter> As shown in Figures 4 to 6, the fuel filter 30 has a filter body 31 that filters the fuel. The filter body 31 extends in a planar manner along the front-to-back and left-to-right directions. The filter body 31 is formed to form a roughly L-shape when viewed from above or from below. That is, the filter body 31 forms a polygon in which one of the corners of a rectangle is missing, resulting in a recess 35.

[0026] As shown in Figure 7, the filter body 31 has an upper filter member 32 and a lower filter member 33. The peripheral edges of each filter member 32 and 33 are welded to each other, forming the filter body 31 into a flat bag shape.

[0027] The upper filter member 32 has an opening in the center, and a connecting pipe 36 is attached to this opening. The connecting pipe 36 is made of resin and is formed in an L-shape. The connecting pipe 36 connects the inside of the filter body 31 and the intake port 71 of the pump holding case 70. Therefore, when the fuel pump 10 operates, fuel is drawn into the fuel pump 10 through the filter body 31 and the connecting pipe 36.

[0028] The fuel filter 30 has an internal frame member 34 provided between each filter member 32, 33. The internal frame member 34 maintains the spacing between each filter member 32, 33. This ensures that the internal volume of the filter body 31 is maintained. The internal frame member 34 can maintain the shape of the filter body 31 even when negative pressure is applied inside the filter body 31 by the fuel pump 10. This allows the fuel to pass through the inside of the filter body 31 properly. Therefore, pressure loss of the sucked fuel can be suppressed.

[0029] <Fuel flow> As shown in Figures 7 and 8, the fuel drawn into the fuel pump 10 is pressurized in the pump section and discharged from the discharge port 12 into the fuel passage 61. The discharged fuel is regulated by the pressure control valve 40 so as not to exceed the set pressure. The regulated fuel then flows to the discharge port 80 and is pumped to the injector 20 (see Figure 1).

[0030] <Pressure control valve> As shown in Figures 7 and 8, the pressure control valve 40 is located at the bottom of the main housing 60. The pressure control valve 40 has a substantially cylindrical casing 41 with its axes oriented vertically. The pressure control valve 40 has a pressure-receiving surface 42 at one end (upper end) in the axial direction of its casing 41, and a discharge port 43 at the other end (lower end). Although not shown, when the fuel pressure applied to the pressure-receiving surface 42 of the pressure control valve 40 becomes higher than the set pressure, the valve body inside the valve displaces against the spring force of the pressure regulating spring, opening the flow path. As a result, a portion of the fuel on the pressure-receiving surface 42 side is guided into the casing 41 as excess fuel and discharged from the discharge port 43.

[0031] <Return piping> As shown in Figures 9 and 10, the return pipe 50 is made up of a first pipe member 51 and a second pipe member 53 that extend in different directions from each other and are connected to each other. Therefore, the return pipe 50 has a bent shape in the middle. The first pipe member 51 is a pipe member that extends in a substantially straight line. An engaging cap portion 52 is formed at one end of the first pipe member 51. The engaging cap portion 52 has an engaging wall portion that is divided into multiple parts in the circumferential direction and is formed in a cap shape. An insertion portion 91 that constitutes a connecting mechanism 90 is formed at the other end of the first pipe member 51. The insertion portion 91 has a cylindrical shape that extends coaxially with the first pipe member 51.

[0032] As shown in Figures 9 and 10, the second pipe member 53 is a pipe member that extends in a substantially straight line. An insertion portion 96, which constitutes the connecting mechanism 90, is formed at one end of the second pipe member 53. An outlet 54 for discharging fuel discharged from the pressure control valve 40 is formed at the other end of the second pipe member 53. The insertion portion 96 has a cylindrical shape that is radially larger than the outer diameter of the insertion portion 91. Therefore, the insertion portion 91 can be inserted into the insertion portion 96.

[0033] The insertion portion 96 is provided such that its axial direction is different from the axial direction of the second pipe member 53. Therefore, when the insertion portion 91 and the insertion portion 96 are connected, the second pipe member 53 extends in a direction intersecting the extension direction of the first pipe member 51. By connecting the second pipe member in this way so that it extends in a different direction from the first pipe member, the bent pipe shape of the return piping can be easily formed.

[0034] <Press-fit structure> As shown in Figure 11, the insertion portion 91 has a tip portion 93 and an enlarged diameter portion 94 that is radially wider on the base end side than the tip portion 93. An inclined surface 95 is formed on the outer circumferential surface between the tip portion 93 and the enlarged diameter portion 94, with the outer diameter gradually widening.

[0035] An inclined surface 97 is formed at the end of the insertion portion 96 to facilitate insertion of the insertion portion 91. The outer diameter of the tip portion 93 is formed to be smaller than the inner diameter of the insertion portion 96. The outer diameter of the enlarged portion 94 is formed to be larger than the inner diameter of the insertion portion 96. Therefore, when the insertion portion 91 is inserted into the insertion portion 96, the enlarged portion 94 of the insertion portion 91 is press-fitted into the insertion portion 96. This causes the first pipe member 51 and the second pipe member 53 to be integrally connected to each other. When press-fitting the enlarged portion 94 into the insertion portion 96, the inclined surface 95 and the inclined surface 97 slide against each other, allowing the enlarged portion 94 to be press-fitted more smoothly.

[0036] When the first pipe member 51 and the second pipe member 53 are connected as described above, the second pipe member 53 is cantilevered to the first pipe member 51. In other words, the second pipe member 53 is not supported anywhere other than the first pipe member 51. Furthermore, the enlarged diameter portion 94 is connected so that there is no gap between its entire circumference and the portion to be inserted 96. This prevents excess fuel from leaking out from between the insertion portion 91 and the portion to be inserted 96.

[0037] <Snap-fit ​​mechanism> As shown in Figures 9 and 10, a claw portion 92 is formed on the outer circumferential surface of the insertion portion 91, projecting radially outward. Furthermore, a generally U-shaped, flexible engaging piece 98 is formed on the outer circumferential surface of the insertion portion 96, which can snap onto the claw portion 92 of the insertion portion 91. The engaging piece 98 flexes and overcomes the slope of the claw portion 92, catching onto the claw portion 92, thereby more reliably preventing the coupling mechanism 90 from coming loose. Additionally, the claw portion 92 and the engaging piece 98 allow for easy circumferential positioning of the second pipe member 53 relative to the first pipe member 51.

[0038] <Return piping connection> As shown in Figures 5 and 6, the engaging cap portion 52 engages with the main housing 60 so as to cover the lower part of the main housing 60 from the outer circumference. This connects the first pipe member 51 to the discharge port 43 of the pressure control valve 40. The first pipe member 51 connected to the main housing 60 extends toward the recess 35 of the fuel filter 30. It also extends upward as it approaches the fuel filter 30. In this way, the first pipe member 51 extends toward the fuel filter 30 while avoiding the pump holding case 70.

[0039] As shown in Figure 5, the connecting mechanism 90 extends upward above the filter body 31. The second pipe member 53 extends further upward from the connecting mechanism 90. As a result, the second pipe member 53 is positioned above the filter body 31.

[0040] As shown in Figure 4, the outlet 54 of the second pipe member 53 is positioned near the approximate center of the filter body 31 in the in-plane direction. This makes it easier for fuel to come into contact with the filter body 31 even if the fuel pump module 1 is tilted in any direction or if fuel discharged from the return pipe 50 is splashed due to the acceleration and deceleration of the vehicle. Since the second pipe member 53 is cantilevered by the connecting mechanism 90, the second pipe member 53 can be easily positioned in an appropriate location relative to the fuel filter 30 without directly connecting the second pipe member 53 and the fuel filter 30 to each other.

[0041] <Compact fuel pump module> As shown in Figure 5, the return pipe 50 extends through the recess 35 of the fuel filter 30 to approximately the center of the filter body 31 in the in-plane direction, as described above. In other words, the recess 35 allows the return pipe 50 to be positioned appropriately close to the filter body 31 while avoiding interference between the return pipe 50 and the filter body 31.

[0042] As shown in Figure 6, consider, for example, a hypothetical strip-shaped region 37 that extends forward from the filter body 31 towards the front (towards the pressure control valve 40) within the width 38 of the filter body 31 in the left-right direction. In this case, the return pipe 50 can be shaped and sized such that, when viewed from a direction perpendicular to the strip-shaped region (up and down direction), it fits entirely within the range of the strip-shaped region 37. That is, the return pipe 50 does not protrude from the left-right width of the filter body 31 in the left-right direction. This makes the fuel pump module 1 more compact. In particular, when inserting the fuel pump module 1 into the fuel tank 2a, the return pipe 50 can be smoothly passed through the opening through which the fuel filter 30 can pass.

[0043] Furthermore, the return pipe 50 enters from the outlet 54 side of the second pipe member 53 when inserting the fuel pump module 1 into the fuel tank 2a. As a result, the snap-fit ​​engaging piece 98 extends from the second pipe member 53 toward the first pipe member 51, which prevents the snap-fit ​​from coming undone, for example, when inserting the module into the fuel tank 2a, by preventing the engaging piece 98 from catching on the opening of the fuel tank 2a.

[0044] <Second pipe component with a different form> The second pipe member 53 is designed to be detachably attached to the first pipe member 51. Therefore, even if the size or shape of the fuel filter 30, or the mounting position or angle of the fuel pump 10, is changed, the excess fuel can be discharged to the appropriate position of the fuel filter simply by changing the shape of the second pipe member without changing the shape of the first pipe member 51. For example, second pipe members of different lengths or second pipe members extending in different directions from the first pipe member 51 can be attached. In this way, even if the configuration of the fuel filter changes, it can be easily accommodated by simply changing the second pipe member.

[0045] In summary, the fuel pump module 1 includes a fuel filter 30 for filtering fuel, a fuel pump 10 for pumping the fuel that has passed through the fuel filter 30, a pressure control valve 40 for adjusting the fuel pressure by discharging a portion of the fuel as excess fuel, and a return pipe 50 for guiding the excess fuel to the outer surface of the fuel filter 30. The return pipe 50 includes a first pipe member 51 connected to the pressure control valve 40, a second pipe member 53 extending in a direction intersecting the first pipe member 51, and a connecting mechanism 90 for detachably connecting one end of the second pipe member 53 to one end of the first pipe member 51 so as to support one end of the second pipe member 53 in a cantilevered manner. In this way, the first pipe member 51 supports the second pipe member 53 in a cantilevered manner, eliminating the need to provide a fixing structure for the return pipe 50 to the fuel filter 30, resulting in a simple configuration. Furthermore, since the second pipe member 53 is detachable, various second pipe members 53 can be switched and attached to the first pipe member 51. For example, even if the arrangement or orientation of the fuel filter 30 relative to the pressure control valve 40 is different, surplus fuel can be easily supplied to the fuel filter 30 by changing the second pipe member 53.

[0046] Furthermore, the connecting mechanism 90 has an insertion portion 91 formed on one of the first pipe member 51 and the second pipe member 53, and an insertion portion 96 formed on the other of the first pipe member 51 and the second pipe member 53 to receive the insertion portion 91. Therefore, the return piping 50 can be formed with a simple configuration in which one of the pipe members 51 and 53 is inserted into the other.

[0047] Furthermore, the connecting mechanism 90 has an insertion portion 91 formed in the first pipe member 51 and an insertion portion 96 formed in the second pipe member 53. As a result, the first pipe member 51 is inserted into the second pipe member 53 to form the return piping 50.

[0048] Furthermore, the insertion portion 91 is press-fitted into the insertion portion 96 so as not to create a gap between it and the insertion portion 96. Therefore, the first pipe member 51 and the second pipe member 53 can be easily connected by press-fitting. In addition, fuel can be supplied to the fuel filter 30 without leaking from the connecting mechanism 90.

[0049] Furthermore, the connecting mechanism 90 has a claw portion 92 formed on the first pipe member 51 and an engaging piece 98 formed on the second pipe member 53 that snaps onto the claw portion 92 when the insertion portion 91 is inserted. Therefore, the snap-fit ​​structure prevents the pipe members from coming apart. In addition, the circumferential positioning of the second pipe member 53 relative to the first pipe member 51 can be easily performed.

[0050] Furthermore, the fuel filter 30 has a flattened shape that extends in a planar manner and has a width 38 in a direction that intersects the direction from the pressure control valve 40 toward the fuel filter 30, but the entire return pipe 50 is within the width 38 of the fuel filter 30. Therefore, for example, when introducing the fuel pump module 1 into the fuel tank 2a, the return pipe 50 can be smoothly inserted into the fuel tank 2a if the opening is large enough for the fuel filter 30 to pass through.

[0051] Furthermore, the fuel filter 30 has a recess 35 to avoid interference with the return pipe 50. Therefore, the recess 35 allows the return pipe 50 and the fuel filter 30 to be positioned close together without interfering with each other. This makes the fuel pump module 1 more compact.

[0052] <First pipe member with a protrusion> In another embodiment, as shown in Figures 12 and 13, the first pipe member 100 may have a pair of left and right protrusions 101 projecting from its outer circumferential surface in the left-right direction. Each protrusion 101 can be, for example, triangular in shape when viewed from below. Each protrusion 101 has an engaging surface 102 that extends perpendicular to the axial direction of the first pipe member 100. The engaging surface 102 of each protrusion 101 extends perpendicular to the insertion direction of the insertion portion 91. The engaging surface 102 is formed so that its surface faces toward the end of the first pipe member 100 opposite to the end where the insertion portion 91 is formed.

[0053] As shown in Figure 14, the engaging surface 102 is brought into contact with a predetermined receiving jig 103 when connecting the first pipe member 100 and the second pipe member. The receiving jig 103 can be composed of, for example, two plate-shaped members that are divided into left and right halves and arranged with a gap between them, and the engaging surface 102 of each protrusion 101 is brought into contact with the corresponding plate-shaped member of this receiving jig 103. This ensures that the receiving jig 103 can reliably receive the load applied to the first pipe member 100 by the insertion of the second pipe member via each protrusion 101. As a result, the insertion portion 96 can be firmly inserted into the insertion portion 91 to the appropriate position. Furthermore, since the load is not transmitted to the engaging cap portion 52 but is released to the receiving jig 103 midway through the first pipe member 100, deformation of the first pipe member 100 due to the load can be suppressed.

[0054] As shown in Figure 13, each protrusion 101 can be formed approximately in the center of the extension direction of the first pipe member 100. Each protrusion 101 can be formed closer to the engaging cap portion 52 than to the claw portion 92 of the connecting mechanism 90. Each protrusion 101 can be formed in a position and size that does not interfere with the engaging piece 98 of the connecting mechanism 90. Furthermore, each protrusion 101 can be formed in a position and size that does not interfere with the fuel filter 30. Each protrusion 101 can be formed so as not to protrude vertically from the first pipe member 100. This prevents the vertical size of the first pipe member 100 from increasing.

[0055] In another embodiment, the protrusion 101 may protrude along the vertical direction. Alternatively, the protrusion 101 may be formed over the entire circumference of the first pipe member 100. The protrusion 101 may be formed at one location, three or more locations, rather than just two locations in the circumferential direction. The engaging surface 102 may be formed by a recess extending circumferentially along the outer surface of the first pipe member 100.

[0056] In summary, the first pipe member 100 has an engaging surface 102 that extends perpendicular to the insertion direction of the insertion portion 91 and faces toward the other end opposite to the end where the connecting mechanism 90 of the first pipe member 100 is formed. Therefore, when a load is applied to the first pipe member 100 by inserting the insertion portion 91, the first pipe member 100 can be properly supported via the engaging surface 102. This allows the insertion portion 91 to be properly inserted into the insertion portion 96.

[0057] Furthermore, the first pipe member 100 has a protrusion 101 that projects from its outer circumferential surface. The engaging surface 102 is formed on the protrusion 101. Therefore, the engaging surface 102 can be formed with a simple configuration in which the protrusion 101 projects from the first pipe member 100.

[0058] <Other examples> In another embodiment, the fuel pump module can be applied to vehicles other than motorcycles, such as (four-wheeled) automobiles, and also to vehicles other than automobiles. The filter body may have a flattened shape that extends planarly along the top and bottom.

[0059] In another embodiment, the return piping may be formed by press-fitting a second pipe member having an insertion portion into a first pipe member having an insertion portion. A snap-fit ​​engaging piece may be formed on the first pipe member, and a claw portion may be formed on the second pipe member. The second pipe member may be longer than the first pipe member.

[0060] Although various embodiments have been described above, this disclosure is not limited to those embodiments, and those skilled in the art can make various other modifications, substitutions, and improvements. [Explanation of symbols]

[0061] 1 Fuel pump module 2a Fuel tank 2b Set Plate 10 Fuel pump 11 Inlet 12 Outlet 20 Injectors 30 Fuel filter 31 Filter body 32 Upper filter member 33 Lower filter member 34 Internal bone members 35 recess 36 Connecting pipe 37. Band-shaped region 38 width 40 Pressure control valve 41 Casing 42 Pressure-receiving surface 43 Discharge Port 50 Return piping 51 First pipe member 52 Engaging cap portion 53 Second pipe member 54 Exit 60 Main Housing 61 Fuel passage 62 Pump insertion part 70 Pump holding case 71 Inhalation port 72 Engaging part 80 discharge ports 90 Connection mechanism 91 Insertion part 92 Claw part 93 Tip 94 Expanded diameter part 95 Slope 96 Inserted part 97 Slope 98 Engaging piece 100 First pipe member 101 Convex part 102 Engagement surface 103 Receiving jig

Claims

1. A fuel pump module located in a fuel tank, A fuel filter that filters the fuel, A fuel pump that pressurizes and delivers the fuel that has passed through the fuel filter, A pressure control valve adjusts fuel pressure by releasing a portion of the fuel as excess fuel, It has a return pipe that guides excess fuel to the outer surface of the fuel filter, The return pipe is A first pipe member connected to the pressure control valve, A second pipe member extending in a direction intersecting the first pipe member, A fuel pump module having a connecting mechanism that detachably connects one end of the second pipe member to one end of the first pipe member so as to support one end of the second pipe member in a cantilevered manner.

2. A fuel pump module according to claim 1, The fuel pump module having a coupling mechanism comprising an insertion portion formed in one of the first pipe member and the second pipe member, and an insertion portion formed in the other of the first pipe member and the second pipe member to receive the insertion portion.

3. A fuel pump module according to claim 2, The fuel pump module having the connecting mechanism an insertion portion formed in the first pipe member and an insertion portion formed in the second pipe member.

4. A fuel pump module according to claim 2 or claim 3, A fuel pump module in which the insertion portion is press-fitted into the insertion portion such that no gap is created between the insertion portion and the insertion portion.

5. A fuel pump module according to claim 2 or claim 3, The fuel pump module having a coupling mechanism comprising a claw portion formed on the first pipe member and an engaging piece formed on the second pipe member that snaps onto the claw portion when the insertion portion is inserted.

6. A fuel pump module according to claim 2 or claim 3, A fuel pump module in which the first pipe member extends perpendicular to the insertion direction of the insertion portion and has an engagement surface facing toward the other end of the first pipe member opposite to the end where the connecting mechanism is formed.

7. A fuel pump module according to claim 6, A fuel pump module in which the first pipe member has a protrusion projecting from its outer circumferential surface, and the engaging surface is formed on the protrusion.

8. A fuel pump module according to claim 1 or claim 2, The fuel filter has a flattened shape and has a width in a direction that intersects the direction from the pressure control valve toward the fuel filter. A fuel pump module in which the entire return piping is within the width range of the fuel filter.

9. A fuel pump module according to claim 1 or claim 2, A fuel pump module having a recess to avoid interference between the fuel filter and the return piping.

Images