TWI693338B - Fuel supply device - Google Patents

Abstract

A fuel supply device has a lid member for closing an opening hole of an upper wall part of a fuel tank, a fuel pump configured to suction fuel from the fuel tank and to discharge said fuel, a pump casing holding the fuel pump and being attached to the lid member, a fuel filter including a bag-shaped filter member for filtering the fuel suctioned into the fuel pump, and a pressure regulator configured to control pressure of the fuel discharged from the fuel pump and including an excess fuel outlet for discharging excess fuel. An excess fuel discharge path for discharging the excess fuel discharged from the excess fuel outlet toward the filter member is formed as part of the pump casing.

Description

Fuel supply

The present invention relates to a fuel supply device, and particularly to a fuel supply device for vehicles.

A fuel supply device known in the prior art has a cover element, a fuel pump, a pump housing, a fuel filter, and a pressure regulator (see Japanese Early Publication No. 2010-112253). In Japanese Early Publication No. 2010-112253, the fuel supply device is attached to the bottom wall member of the fuel tank so that the cover element closes the opening hole formed in the bottom wall member. The fuel supply device sucks fuel from a fuel tank via a fuel pump and discharges the fuel to the outside. The pump housing holding the fuel pump is attached to the cover element. The fuel filter includes a bag-shaped filter element that filters the fuel drawn into the fuel pump. The pressure regulator controls the fuel discharged by the fuel pump, and has an excess fuel outlet for discharging excess fuel. The pressure regulator also includes a lower element and an upper element. The lower element is installed upright on the cover element. The upper element is attached to the lower element and suspended on the pump casing, so that the lower element and the upper element form an excess fuel discharge path. According to this configuration, the excess fuel discharged via the excess fuel outlet of the pressure regulator flows through the excess fuel discharge path and is then discharged toward the filter element.

According to the fuel supply device of Japanese Early Publication No. 2010-112253, it is necessary to use an additional component separate from the pump casing. That is, the pressure regulator needs to use an additional component to form an excess fuel discharge path between the two components corresponding to the lower element and the upper element. Therefore, the size and cost of the fuel supply device relatively increase as the number of components increases. Therefore, it is necessary to provide an improved fuel supply device.

The first aspect of the present invention is a fuel supply device having a cover element, a fuel pump, a pump housing, a fuel filter, and a pressure regulator. The cover element is used to close the opening of the upper wall part of the fuel tank. The fuel pump system is configured to draw fuel from the fuel tank and discharge fuel. The pump housing holds the fuel pump and is attached to the cover element. The fuel filter includes a bag-shaped filter element that filters the fuel sucked into the fuel pump. The pressure regulator is configured to control the pressure of the fuel discharged from the fuel pump, and includes an excess fuel outlet for discharging excess fuel. The excess fuel discharge path for discharging the excess fuel discharged from the excess fuel outlet toward the filter element is formed as a part of the pump housing.

According to the first aspect of the present invention, since the excess fuel discharge path is formed as a part of the pump housing, it is not necessary to use any additional components separate from the pump housing to form the excess fuel discharge path, and thus the number of components can be avoided in number increase. Therefore, it is possible to avoid increasing the size and cost of the fuel supply device.

A second aspect of the present invention is a fuel supply device based on the first aspect, wherein the pump housing includes an opposing wall member facing the excess fuel outlet including the pressure regulator, wherein the excess fuel storage wall member is formed at Opposite wall member, and wherein the excess fuel storage wall member supports the excess fuel outlet including the pressure regulator, and the excess fuel storage wall member forms an excess fuel storage member, the excess fuel storage member is used to export the excess fuel Immerse in the excess fuel stored in it, and pass through the excess fuel discharge path.

According to the second aspect of the present invention, the excess fuel discharged from the excess fuel outlet of the pressure regulator is stored in the excess fuel storage part, and then flows through the excess fuel discharge path. Therefore, the surplus fuel outlet of the pressure regulator is immersed in the surplus fuel temporarily stored in the surplus fuel storage part, so that the discharge sound of the surplus fuel discharged from the surplus fuel outlet can be suppressed.

The third aspect of the present invention is the fuel supply device based on the first or second aspect, wherein the pressure regulator is arranged in parallel with the fuel pump so that the excess fuel outlet is oriented downward.

According to a third aspect of the invention, the pressure regulator may be close to the fuel pump, and the excess fuel outlet may be a filter element close to the fuel filter. Therefore, the pump housing can be miniaturized.

The fourth aspect of the present invention is the fuel supply device based on any one of the first to third aspects, wherein the fuel pump is held between the cover member and the pump housing.

According to the fourth aspect of the present invention, in addition to the use of the cover element and the pump housing, there is no need to use any additional components to hold the pressure regulator, so that the increase in the number of components can be avoided.

Hereinafter, an embodiment of the present invention will be described in conjunction with the drawings. In this embodiment, a fuel supply device for vehicles (such as motorcycles and two-wheeled vehicles of SUV) will be described. Figure 1 is a perspective view of a fuel supply device. Figure 2 is a front view of the fuel supply device. Figure 3 is a right side view of the fuel supply device. Figure 4 is a cross-sectional side view of the fuel supply device. Fig. 5 is a perspective view of the fuel supply device in an exploded state. The arrows in each figure respectively indicate the front direction, the rear direction, the right direction, the left direction, the up direction, and the down direction of the fuel supply device. The upward direction and the downward direction correspond to the gravity direction in a state where the fuel supply device is installed on the fuel tank of the vehicle, that is, the upward direction and the downward direction correspond to the vehicle vertical height direction of the fuel supply device. The front direction, the rear direction, the right direction, and the left direction are not specifically specified with respect to the vehicle, in which case the front direction, the rear direction, the right direction, and the left direction may be one of a plurality of directions.

<Configuration of Fuel Supply Device> The configuration of the fuel supply device will be explained. As shown in FIG. 2, the fuel supply device 10 is configured to move fuel from the fuel tank 12 of the vehicle into the engine (internal combustion engine). The type of the fuel supply device (see FIG. 3) attached to the upper wall member 13 of the fuel tank 12 is referred to as the upper mounting type. The opening hole 14 formed in the upper wall member 13 of the fuel tank 12 has a circular through hole shape.

As shown in FIG. 4, the fuel supply device 10 has a cover member 16, a fuel pump 18, a pressure regulator 20, a pump housing 22 and a fuel filter 24. The cover member 16 is made of a resin material and has a cover body 26 in the shape of a disc. The cover member 16 has a portion that protrudes vertically upward from the radial center area of the cover body 26, and this portion is combined with the fuel delivery tube member 36. As shown in FIGS. 4 and 5, the fuel delivery tube member 36 extends rearward from the central portion of the cover body 26. FIG. 6 is a bottom view of the bottom surface of the cover member 16 of the fuel supply device 10. As shown in FIG. 6, on the bottom surface of the cover body 26, a substantially annular fitting wall member 27 is formed concentrically with the cover body 26 (see FIGS. 2 and 3 ), and this fitting wall member 27 is shared with the cover body 26 The same radial center. Because of the circumferential clearance between the cover body 26 and the fitting wall member 27, the outer diameter of the fitting wall member 27 having a single size is smaller than the outer diameter of the cover body 26, the amount of this radial clearance shown in FIG. 6 Includes single size. The fitting wall member 27 is formed by a plurality of circumferential arcs of unequal intervals along the circumferential direction (four in the embodiment shown in FIG. 6).

As shown in FIG. 4, the pump connecting cylindrical member 28 extending vertically at the central portion of the cover body 26 is formed in the shape of a hollow cylinder. The coupling cylindrical member 30 formed on the bottom surface of the cover body 26 is formed into a substantially hollow cylindrical shape surrounding the pump connecting cylindrical member 28. Compared to the pump-connected cylindrical member 28, the coupling cylindrical member 30 extends downward and radially outward in the vertical direction. A pair of left and right coupling protrusions 31 are formed in the left and right directions of the portion after coupling the surface of the cylindrical member 30 (see FIG. 6). The coupling protrusion 31 shown in FIG. 3 is formed approximately on the cover body 26 and The vertical middle of the downward convex portion of the coupling cylindrical member 30 above the lowest point of the coupling cylindrical member 30.

The regulator fitting cylindrical member 33 is formed on the cover body 26 in the shape of a hollow cylinder and extending upward in the vertical direction. The regulator fitting cylindrical member 33 is positioned in front of the coupling cylindrical member 30 and directly adjoins the coupling cylindrical member 30. The regulator fitting cylindrical member 33 and the coupling cylindrical member 30 are formed parallel to each other along the vertical direction. The regulator fitting cylindrical member 33 is formed in a stepped cylindrical shape having a small diameter upper member and a large diameter lower member. The rear end part of the lower part of the fitting fitting cylindrical member 33 and the front end part of the coupling cylindrical member 30 partially overlap each other in the front-rear direction. The amount of the regulator from the bottom surface of the cover body 26 to cooperate with the downward convex portion of the cylindrical member 33 is smaller than the amount of the downward convex portion coupled to the cylindrical member 30, but greater than the amount of the pump connection cylindrical shape from the bottom surface of the lid body 26 The amount of the downward projection of the component 28. Furthermore, the coupling convex portion 34 is formed to extend forward from the front surface of the adjuster fitting cylindrical member 33 (see FIGS. 4 and 6).

On the upper surface side of the cover body 26, a fuel delivery tube member 36 having a straight longitudinally extending tube shape is formed on the upper end member of the pump connection cylindrical member 28. The fuel delivery tube member 36 extends from the pump connection cylindrical member 28 It extends backwards in the front-rear direction. The front end part of the fuel delivery tube part 36 is connected to the upper end part of the regulator fitting cylindrical part 33. The inner space of the fuel delivery pipe member 36 is in fluid communication with the pump connecting cylindrical member 28 and the regulator fitting cylindrical member 33.

As shown in FIG. 5, the first electronic connector member 38 and the second electronic connector member 39 are provided on the upper surface of the cover body 26. The first electronic connector part 38 is located on the left side and extends behind the pump connection cylindrical part 28. The second electronic connector part 39 is located on the left side of the regulator fitting cylindrical member 33 and extends to the front of the regulator fitting cylindrical member 33.

As shown in FIG. 4, the upper end part of the vertically installed fuel pump 18 is assembled in the coupling cylindrical part 30. The fuel pump 18 is formed in a substantially cylindrical shape, the outer diameter of which is approximately the same as the inner diameter of the coupling cylindrical member 30, and the fuel pump 18 has a fuel suction port 41 on its bottom end side and on its top side There is a fuel discharge port 42 (see Figure 5). The fuel pump 18 is a Wesco-type electrically operated pump. In particular, the fuel pump 18 is operated by driving of a motor, and is configured to suck the fuel stored in the fuel tank 12 through the fuel suction port 41 and further pressurize and discharge the fuel from the fuel discharge port 42. The fuel discharge port 42 is assembled inside the circumferential direction of the pump connection cylindrical member 28 and is connected to the pump connection cylindrical member 28. The O-ring 44 is provided between the pump connecting cylindrical member 28 and the fuel discharge port 42 of the fuel pump 18, so that the O-ring 44 connects the pump to the cylindrical discharge member 42 and the fuel discharge port 42 of the fuel pump 18. To seal.

The cylindrical pressure regulator 20 is assembled and housed in the lower end part of the regulator fitting cylindrical part 33 protruding below the cover body 26. The pressure regulator 20 is a ball valve type pressure regulator. The pressure regulator 20 has a fuel inlet 46 on its upper surface side and an excess fuel outlet 47 on its lower surface side. The pressure regulator 20 controls the pressure of the fuel introduced from the fuel inlet 46 (that is, the fuel derived from the fuel delivery pipe member 36), and ejects (that is, discharges the excess fuel from the excess fuel outlet 47). The O-ring 48 is provided between the regulator fitting cylindrical member 33 and the pressure regulator 20 to seal the regulator fitting cylindrical member 33 and the pressure regulator 20. The pressure regulator 20 and the fuel pump 18 are arranged parallel to each other, so that the vertical vertical and vertical vertical axes of the pressure regulator 20 and the fuel pump 18 are parallel to each other.

On the bottom surface of the cover element 16, the pump housing 22 is used for containing the fuel pump 18 therein. FIG. 7 is a perspective view of the pump housing 22. FIG. 8 is a top view of the pump housing 22. As shown in FIG. 7, the pump housing 22 is made of a resin material and is formed into a cylindrical shape with a closed bottom. The pump housing 22 has a cylindrical member 50 and a bottom wall member 51, wherein the cylindrical member 50 is hollow In the shape of a cylinder, the bottom wall member 51 surrounds the opening member below the cylindrical member 50. The pair of left and right coupling pieces 53 protrude upward from the upper rear edge of the cylindrical member 50 (see FIGS. 5 and 7). On each of the bonding pieces 53, bonding holes 54 are formed in the inner area of the bonding pieces 53.

On the front surface side of the cylindrical member 50, a gauge attachment wall part 56 is formed in the shape of a flat plate. A gauge (not shown) is installed on the front surface side of the gauge attachment wall member 56. The center gauge is a liquid level gauge, which is used to detect the remaining amount of fuel in the fuel tank 12 (that is, the liquid level).

In the radial center region of the bottom wall member 51, the filter connecting cylindrical member 58 is formed in the shape of two steps of hollow hollow cylinders extending downward (see FIG. 4). At the lower end of the cylindrical member 50, a pair of left and right coupling pieces 59 extending downward are formed symmetrically in the left-right direction (Figure 7 only shows the right coupling piece. The left and right coupling pieces 59 are for extending through the cylindrical member 50 The radial center above and below the longitudinal axis, symmetrical in the left-right direction). The filter connecting cylindrical member 58 is provided between the coupling pieces 59 such that the coupling piece 59 is located at a predetermined interval in the left-right direction from the filter connecting cylindrical member 58 and is separated. The coupling convex portions 60 extending radially outward in the right/left direction of the left and right coupling pieces 59, respectively, are formed on the outer side surface of each of the coupling pieces 59.

The horizontally extending regulator support member 62 is formed integrally as a part of the member before the upper end member of the cylindrical member 50 and extends forward from the member before the upper end member of the cylindrical member 50. The upper end member of the gauge attachment wall member 56 is connected to the bottom end member of the regulator support member 62 (see FIG. 4). The regulator support member 62 faces the surface of the pressure regulator 20 which includes an excess fuel outlet 47. The regulator support member 62 corresponds to the "opposing wall member" of the above-mentioned pump casing in this description. The lower surface of the pressure regulator 20 corresponds to the above-mentioned "components including excess fuel outlets" and "discharge components" in this description.

The support protrusion 63 protruding upward from the upper surface of the adjuster support member 62 is formed into a substantially "C" shape (see FIG. 8). The support protrusion 63 supports the outer periphery of the lower surface of the pressure regulator 20 to form an excess fuel storage member 64 that stores excess fuel at the excess fuel outlet 47 (see FIG. 4). The open section of the support protrusion 63 (that is, the “C”-shaped open section) is oriented to the right rear area of the regulator support member 62. The support convex portion 63 in this description corresponds to "excess fuel storage wall member". The coupling piece 65 protruding upward is formed at the foremost end of the regulator support member 62. The coupling through hole 66 is formed inside the coupling piece 65.

The excess fuel discharge path 68 is integrally formed between the regulator support member 62 and the coupling cylindrical member 30 with a “U” shaped groove, which is directly adjacent to the excess fuel storage member 64 , And fluidly communicates to the excess fuel storage member 64 via the support convex portion 63. The excess fuel discharge path 68 includes a groove bottom member 69, a front groove wall member 70, and a rear groove wall member 71. The groove bottom member 69 includes a first inclined member 69a, a horizontal member 69b, and a second inclined member 69c. The first inclined member 69a is steeply inclined downward from the open section of the support convex portion 63 in the rear direction. The horizontal member 69b extends almost horizontally from the lowest end member of the first inclined member 69a to the right. The second inclined member 69c is gradually inclined from the end member of the horizontal member 69b (see FIG. 8). The front groove wall member 70 is formed into a vertical plate shape and is perpendicular to the right edge of the first inclined member 69a of the groove bottom member 69, the front edge of the horizontal member 69b, and finally the front edge of the second inclined member 69c To extend. The rear groove wall member 71 is formed in a vertical plate shape, and is vertically along the left edge of the first inclined member 69a of the groove bottom member 69, the rear edge of the horizontal member 69b, and finally the rear edge of the second inclined member 69c extend.

As shown in FIG. 4, the lower part of the fuel pump 18 is assembled in the cylindrical member 50 of the pump housing 22. The fuel suction port 41 of the fuel pump 18 is assembled in the filter connection cylindrical member 58, and the fuel suction port 41 of the fuel pump 18 is connected to the filter connection cylindrical member 58. The coupling hole 54 of the coupling piece 53 of the cylindrical member 50 is coupled to the coupling element of the cover element 16 via a snap connection due to elastic deformation (that is, the flexural deformation of the coupling piece 53 along the surface of the coupling protrusion 31) The coupling convex portions 31 of the member 30 are complementary coupled (see FIG. 3). The coupling through-hole 66 of the coupling piece 65 of the adjuster support member 62 is connected to each other via snap-fitting due to elastic deformation (that is, the flexural deformation of the coupling piece 65 along the surface of the coupling protrusion 34 (see FIG. 2)) The regulator of the cover member 16 cooperates with the coupling protrusion 34 of the cylindrical member 33 to complementarily couple. Therefore, the cover element 16 and the pump housing 22 can be fixed to each other in this way, and the fuel pump 18 is held between the cover element 16 and the pump housing 22. Therefore, the pressure regulator 20 fitted with the regulator of the cover member 16 and the cylindrical member 33 is held in place by the support protrusion 63 of the regulator support member 62 of the pump housing 22. That is, due to the integral design of the two components of the cover element 16 and the pump housing 22, when the fuel pump 18 is held (held) between the cover element 16 and the pump housing 22, the pressure regulator 20 is also held (held) Between the cover element 16 and the pump housing 22. The excess fuel outlet 47 of the pressure regulator 20 communicates with the excess fuel storage member 64 of the regulator support member 62 and the connected excess fuel discharge path 68.

The lower end part of the pump housing 22 is coupled to the fuel filter 24. The fuel filter 24 includes a filter element 73 and a connecting element 74. The filter element 73 is an element for filtering fuel, and is made of non-woven fabric, mesh material, filter paper, woven fiber, or the like. The filter element 73 is formed in a bag shape, and the filter element 73 is flat in the vertical direction (that is, it extends horizontally perpendicular to the vertical direction and lengthwise). The filter element 73 houses the inner support element 75 made of a resin material, and the inner support element 75 can rigidly hold the filter element 73 in the expanded state.

As shown in FIG. 5, the connecting element 74 is made of a resin material, and has a connecting pipe member 77, a flange member 78, and an attachment member 79, wherein the connecting pipe member 77 is formed as a hollow cylinder, and the flange member 78 The lower end member formed on the connecting pipe member 77 is an annular plate, and the attachment member 79 is formed on the outer periphery of the upper portion of the connecting pipe member 77. As shown in FIG. 4, the flange member 78 is provided on the upper surface of the filter element 73 and presses down the surface of the filter element 73 to be combined with the inner support element 75 via a snap connection or the like. In particular, as shown in FIG. 4, the periphery of the filter element 73 defines an attachment hole of the filter element 73, and the periphery of the filter element 73 is held between the flange member 78 and the inner support element 75. The connecting pipe member 77 is in fluid communication with the inner space of the filter element 73. The paired front and rear coupling holes 80 are formed in the attachment member 79 (see FIG. 5).

As shown in FIGS. 1 and 7, the coupling convex portion 60 of the coupling piece 59 of the pump housing 22 is connected by snapping due to elastic deformation (that is, the flexural deformation of the coupling piece 59 along the surface of the coupling hole 80) It is complementary to the coupling hole 80 of the attachment member 79 (see FIG. 3). Therefore, the bottom of the pump housing 22 can be coupled to the fuel filter 24 in this way. Furthermore, the filter connecting cylindrical member 58 of the pump housing 22 is fitted inside the connecting pipe member 77 of the connecting member 74 and is connected to the connecting pipe member 77 of the connecting member 74 (see FIG. 4).

Although not illustrated in the drawings, the lead wire including the electric wire extending from the fuel pump 18 is electrically connected to the first electronic connector part 38 on the bottom surface of the cover body 26. The lead wire is coupled to the wire of the central gauge to detect the liquid level, and is electrically connected to the second electronic connector part 39.

As shown in FIG. 2, by inserting the fuel supply device 10 through the opening hole 14 of the upper wall member 13 of the fuel tank 12, the fuel supply device 10 is installed in the fuel tank 12, and then the cover member 16 is attached Up to the upper wall member 13 (see FIG. 3). When the cover member 16 is attached to the upper wall member 13 in this way, the state of the cover member 16 is such that the matching wall member 27 of the cover member 16 is fitted in the opening hole 14 of the fuel tank 12, and the outer periphery of the cover body 26 is The radial position is outside the opening hole 14 and rests on the edge portion of the upper wall member 13 surrounding the opening hole 14. In this way, the opening 14 of the upper wall member 13 of the fuel tank 12 is completely closed by the cover element 16. The bottom surface of the filter element 73 of the fuel filter 24 is in contact (without spacing) or adjoins the bottom surface of the fuel tank 12 (not shown). Although not shown in the drawings, the end member (rear end member) of the fuel delivery pipe member 36 located above the upper surface side of the cover member 16 is coupled to the fuel supply pipe connected to the engine. Furthermore, the first electronic connector part 38 and the second electronic connector part 39 are coupled with an external connector, and each of the external connectors is connected to a control device (engine control unit (ECU)) .

<Operation of Fuel Supply Device 10> The operation of the fuel supply device 10 will be described below. When the fuel pump 18 is driven, the fuel in the fuel tank 12 is sucked in order through the filter element 73, the connecting pipe member 77 of the fuel filter 24, and finally the filter connecting cylindrical member 58 of the pump housing 22 The fuel pump 18 is then pressurized. In this way, the fuel pressurized by the fuel pump 18 is discharged to the fuel delivery tube member 36 via the pump connection cylindrical member 28 of the cover member 16, and then is forwardly supplied to the engine.

The pressure of the fuel supplied to the engine (that is, the pressure of the fuel in the fuel delivery pipe part 36) is controlled by the pressure regulator 20, so that the fuel can be pressurized to a predetermined pressure. The excess fuel in the pressure regulator 20 is discharged from the excess fuel outlet 47 to the excess fuel storage member 64 surrounded by the support protrusion 63 of the regulator support member 62 of the pump housing 22, and then is stored in the excess fuel storage member 64. Therefore, the excess fuel outlet 47 of the pressure regulator 20 is immersed in the excess fuel stored in the excess fuel storage member 64. The excess fuel flows from the excess fuel storage member 64 through the excess fuel discharge path 68, and then is finally discharged (released) from the discharge-side end member of the excess fuel discharge path 68. At this time, when the fuel level in the fuel tank 12 is lower than the height of the upper surface of the filter element 73 of the fuel filter 24, the excess fuel discharged (released) from the discharge-side end member of the excess fuel discharge path 68 It descends toward the upper surface of the filter element 73 (see arrow in Figure 2). When the remaining amount of fuel in the fuel tank 12 is small, this configuration can avoid insufficient fuel supply due to vibration, acceleration, deceleration, and movement of such vehicles.

<Function and effect of the fuel supply device 10> According to the fuel supply device 10, since the excess fuel discharge path 68 is integrally formed as a part of the pump housing 22, there is no need for an additional component separate from the pump housing 22 to form the excess fuel discharge path 68, and thus an increase in the number of components can be avoided. Therefore, it is possible to avoid an increase in the size and cost of the fuel supply device 10 while increasing the durability of the device and improving the mechanical integrity and life of the device.

The surplus fuel discharged from the surplus fuel outlet 47 of the pressure regulator 20 is stored in the surplus fuel storage member 64, and this surplus fuel storage member 64 serves as a buffer and then flows into the surplus fuel discharge path 68. Because the surplus fuel outlet 47 of the pressure regulator 20 is immersed in the surplus fuel temporarily stored in the surplus fuel storage member 64 as a buffer, the discharge sound of the surplus fuel discharged from the surplus fuel outlet 47 can be suppressed .

The pressure regulator 20 is arranged parallel to the fuel pump 18 so that the excess fuel outlet 47 is oriented downward. Therefore, the pressure regulator 20 may be close to the fuel pump 18, and the excess fuel outlet 47 may also be close to the filter element 73 of the fuel filter 24. Therefore, the pump housing 22 can be miniaturized.

The pressure regulator 20 is held between the cover element 16 and the pump housing 22. Therefore, in addition to using the cover element 16 and the pump housing 22, there is no need to use any additional components to hold the pressure regulator 20, and thus an increase in the number of components can be prevented.

The invention is not limited to this embodiment, and modifications can be made without departing from the scope of the invention. For example, in addition to two-wheel vehicles, the fuel supply device 10 of the present invention is applicable to various fuel supply devices, for example, for vehicles such as automobiles, ships, or industrial machines.

10‧‧‧ Fuel supply device 12‧‧‧ Fuel tank 13‧‧‧ Upper wall part 14‧‧‧ Opening hole 16‧‧‧ Cover element 18‧‧‧ Fuel pump 20‧‧‧ Pressure regulator 22‧‧‧ Pump Housing 24‧‧‧Fuel filter 26‧‧‧Cover body 27‧‧‧Mating wall part 28‧‧‧‧Pump connecting cylindrical part 30‧‧‧Coupling cylindrical part 31‧‧‧Combining convex part 33‧‧‧ The regulator fits the cylindrical member 34‧‧‧combination convex part 36‧‧‧ fuel delivery tube member 38‧‧‧‧first electronic connector part 39‧‧‧second electronic connector part 41‧‧‧fuel suction port 42‧ ‧‧Fuel discharge port 44‧‧‧O-ring 46‧‧‧ Fuel inlet 47‧‧‧Excess fuel outlet 48‧‧‧O-ring 50‧‧‧Cylindrical part 51‧‧‧Bottom wall part 53‧‧‧ Coupling piece 54 ‧ ‧ ‧ combined perforation 56 ‧ ‧ ‧ gauge attachment wall member 58 ‧ ‧ ‧ filter connection cylindrical member 59 ‧ ‧ ‧ coupling piece 60 ‧ ‧ ‧ coupling convex part 62 ‧ ‧ ‧ regulator support member 63 ‧ ‧Support convex part 64‧‧‧Excess fuel storage part 65‧‧‧Combination piece 66‧‧‧Combination through hole 68‧‧‧Excess fuel discharge path 69‧‧‧Grove bottom part 69a‧‧‧First inclined part 69b ‧‧‧Horizontal part 69c‧‧‧Second inclined part 70‧‧‧Front groove wall part 71‧‧‧‧Back groove wall part 73‧‧‧Filter element 74‧‧‧‧Connecting element 75‧‧‧Inner support Element 77‧‧‧Connecting pipe part 78‧‧‧ Flange part 79‧‧‧ Attachment part 80‧‧‧Combination hole

Fig. 1 is a perspective view of a fuel supply device according to an embodiment. Figure 2 is a front view of the fuel supply device. Figure 3 is a right side view of the fuel supply device. Figure 4 is a cross-sectional side view of the fuel supply device. Fig. 5 is a perspective view of the fuel supply device in an exploded state. Figure 6 is a bottom view of the cover element of the fuel supply device. Figure 7 is a perspective view of the pump housing of the fuel supply device. Figure 8 is an upper view of the pump housing.

10‧‧‧fuel supply device

16‧‧‧Cover element

18‧‧‧ fuel pump

20‧‧‧pressure regulator

22‧‧‧Pump housing

24‧‧‧ fuel filter

26‧‧‧Cover body

28‧‧‧Pump connected to cylindrical parts

33‧‧‧ Regulator with cylindrical parts

36‧‧‧Fuel delivery pipe parts

38‧‧‧ First electronic connector parts

39‧‧‧Second electronic connector parts

41‧‧‧Fuel intake port

42‧‧‧ Fuel Discharge Port

44‧‧‧O-ring

46‧‧‧ Fuel inlet

48‧‧‧O-ring

50‧‧‧Cylindrical parts

53‧‧‧Combined film

54‧‧‧Combined perforation

56‧‧‧ gauge wall attachment

58‧‧‧Filter connected to cylindrical parts

59‧‧‧Combined film

60‧‧‧Combined convex part

62‧‧‧ Regulator support parts

65‧‧‧Combined film

66‧‧‧Combined through hole

68‧‧‧Excess fuel discharge path

70‧‧‧Front groove wall parts

71‧‧‧Back groove wall parts

73‧‧‧Filter element

74‧‧‧Connecting element

77‧‧‧Connecting pipe parts

78‧‧‧Flange parts

79‧‧‧ Attached parts

80‧‧‧Combination hole

Claims (5)

A fuel supply device includes: a cover element for closing an opening of an upper wall part of a fuel tank; a fuel pump configured to suck a fuel from the fuel tank and discharge the fuel; a pump housing, held The fuel pump is attached to the cover element; a fuel filter includes a bag-shaped filter element that filters the fuel sucked into the fuel pump; and a pressure regulator, configured To control the pressure of the fuel discharged from the fuel pump, and include an excess fuel outlet that discharges excess fuel; wherein the excess fuel discharge from the excess fuel outlet is directed toward an excess fuel discharge path of the filter element Is formed as a part of the pump housing; wherein the pressure regulator has a discharge member, the discharge member includes the excess fuel outlet; wherein the pump housing includes a pair of facing wall members, the opposite wall member is directed toward the pressure regulator The discharge member; wherein the opposed wall member includes an excess fuel storage wall member that supports the discharge member of the pressure regulator; and wherein the excess fuel storage wall member forms an excess fuel storage member, The surplus fuel storage component is used to immerse the surplus fuel outlet in the surplus fuel stored therein, and thus connect the surplus fuel outlet with the surplus fuel discharge path; wherein the opposing wall member has a surplus fuel outlet The first side. The fuel supply device according to item 1 of the patent application scope, wherein the pressure regulator is disposed parallel to the fuel pump so that the excess fuel outlet is directed downward. According to the fuel supply device of claim 1 or 2, the pressure regulator is held between the cover element and the pump housing. According to the fuel supply device of claim 1 of the patent application range, the excess fuel storage wall member is a support convex portion extending from the first surface. The fuel supply device according to item 1 of the patent application range, wherein the excess fuel discharge path extends from the excess fuel storage member in the radial direction of the central axis of the excess fuel outlet of the pressure regulator.

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