JP2012136966A - Vehicular fuel supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further surely retain fuel held in a fuel storage part in the fuel storage part, in a vehicular fuel supply device having a fuel pump held between a base member mounted to a bottom wall of a fuel tank and formed with the fuel storage part and an upper cup formed into a bottomed tubular shape with the upper end closed, connected to a base member and having a pressure regulator held thereto.SOLUTION: A tubular wall part 28c is formed integrally with a base member 28 to be connected to a lower part of an upper cup 29, and at least one fuel introduction hole 77 is formed on the tubular wall part 28c of the base member 28 out of the upper cup 29 and the base member 28 to be oriented to a side of a vehicle in mounting a fuel tank 21 on the vehicle.

Description

  The present invention provides a fuel pump having a cylindrical pump housing whose central axis is elongated in the vertical direction, a base member attached to the bottom wall of the fuel tank, a bottomed cylindrical shape with the upper end closed, and the fuel An upper cup that is coupled to the base member while covering the fuel pump so as to hold the pump between the base member, and an upper cup that is connected to the discharge port of the fuel pump. The present invention relates to a vehicular fuel supply device in which a fuel storage portion is formed in the base member for introducing and storing the fuel sucked by the fuel pump from the fuel tank.

  A fuel pump is held between the base member and the upper cup, which are coupled to each other, and a plurality of openings extending up and down on the side wall of the upper cup to guide the fuel in the fuel tank to a fuel reservoir formed in the base member Patent Document 1 discloses a vehicular fuel supply device in which a pressure regulator connected to a discharge port of a fuel pump is held by an upper cup. Yes.

JP 2010-77906 A

  However, in the one disclosed in Patent Document 1, in order to effectively introduce the fuel in the fuel tank into the fuel reservoir, a plurality of large and small openings are provided in the base member and the upper cup. When the amount of fuel remaining in the fuel tank is low, when the fuel moves in the fuel tank due to acceleration / deceleration of the vehicle, the fuel held in the fuel storage part may return to the fuel tank side. Is expected.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle fuel supply device that can more reliably retain the fuel held in the fuel storage section in the fuel storage section. To do.

  In order to achieve the above object, the present invention provides a fuel pump having a cylindrical pump housing whose central axis is elongated in the vertical direction, a base member attached to the bottom wall of the fuel tank, and a bottomed cylinder whose upper end is closed. An upper cup coupled to the base member while covering the fuel pump so that the fuel pump is held between the base member and the discharge port of the fuel pump. And a pressure regulator that is held by the upper cup, and the fuel for the vehicle in which a fuel storage part that introduces and stores the fuel sucked by the fuel pump from the fuel tank is formed in the base member In the supply device, a cylindrical wall formed in a cylindrical shape so as to cover a portion of the lower portion of the fuel pump that protrudes downward from the upper cup Is provided integrally with the base member so as to be connected to the lower part of the upper cup, and at least one fuel introduction hole for introducing the fuel in the fuel tank into the fuel reservoir is provided in the fuel tank. A first feature is that the upper wall and the base member are provided on the cylindrical wall portion of the base member so as to be directed to the side of the vehicle when the vehicle is mounted.

  According to the present invention, in addition to the configuration of the first feature, surplus fuel from the pressure regulator held in the upper cup is provided between the upper cup and the cylindrical wall portion and the pump housing. A second feature is that a gap functioning as an excess fuel passage leading to the fuel reservoir is formed.

  In addition to the configuration of the first or second feature, the third feature of the present invention is that the fuel introduction hole is formed in a slit shape by cutting out a part of the cylindrical wall portion.

  The present invention is characterized in that, in addition to the configuration of the third feature, the fuel introduction hole is formed in a vertically long slit shape.

  In the present invention, in addition to the configuration of the first feature, a conductive wire connected to the fuel pump is provided on an upper portion of the upper cup so as to be positioned on a side of the pressure regulator and above the fuel pump. It is the fifth feature that it is led out of the upper cup from the insertion hole formed.

  According to the present invention, in addition to the configuration of the first feature, a fuel outlet opening that opens in the fuel storage portion facing the bottom surface of the fuel pump is connected to a filter disposed outside the base member and the upper cup. In the sixth feature, the base member is integrally provided with a partition wall provided on the side wall of the base member and separating the deaeration hole provided on the bottom surface of the fuel pump and the fuel outlet port. And

  In addition to the configuration of the sixth feature of the present invention, the base member is provided with a connection pipe portion for intake that guides the fuel guided from the filter to the fuel pump side, and the fuel outlet and the desorption port are provided. A seventh feature is that the pores are arranged at positions sandwiching the suction connection pipe portion on a projection view on a plane orthogonal to the axis of the fuel pump.

  According to the first aspect of the present invention, the cylindrical wall portion connected to the lower portion of the upper cup is integrated with the base member so as to cover a portion of the lower portion of the fuel pump that protrudes downward from the upper cup. Since at least one fuel introduction hole directed to the side of the vehicle is provided in the cylindrical wall portion of the base member of the upper cup and the base member, the remaining amount of fuel in the fuel tank is small However, the fuel can be easily taken into the fuel storage part, and the fuel taken into the fuel storage part can be made difficult to return to the fuel tank even during acceleration / deceleration of the vehicle. Can be retained in the fuel reservoir.

  Further, according to the second feature of the present invention, the surplus fuel from the pressure regulator is directly supplied to the fuel storage portion through the surplus fuel passage formed as a gap between the upper cup and the cylindrical wall portion and the pump housing. The upper cup, which is formed in a bottomed cylinder with the upper end closed so as to cover the entire circumference of the fuel pump, is not provided with a fuel introduction hole. Return can be suppressed as much as possible.

  According to the third aspect of the present invention, a slit-like fuel introduction hole is formed by cutting out a part of the cylindrical wall portion, so that the fuel introduction hole is easily formed in the cylindrical wall portion connected to the upper cup. can do.

  According to the fourth feature of the present invention, by making the fuel introduction hole into a vertically long slit shape, it is possible to suppress the fuel in the fuel reservoir from returning to the fuel tank through the fuel introduction hole.

  According to the fifth feature of the present invention, since the insertion hole through which the conducting wire connected to the fuel pump is inserted is provided on the side of the pressure regulator and above the fuel pump at the upper part of the upper cup, It is not necessary to secure a space for arranging the conducting wire in the upper cup, and it becomes easy to form an excess fuel passage that guides excess fuel from the pressure regulator to the fuel reservoir.

  According to a sixth aspect of the present invention, the fuel pump includes a deaeration hole provided on a bottom surface of the fuel pump, and a fuel outlet port provided in the side wall of the base member so as to be connected to the filter by being opened in the fuel storage portion. Since the gap is separated by a partition wall provided integrally with the base member, it is possible to easily suppress the bubbles discharged from the deaeration holes from moving toward the fuel outlet.

  Further, according to the seventh feature of the present invention, the fuel outlet and the deaeration hole are configured to guide the fuel guided from the filter to the fuel pump side on a projection view on a plane orthogonal to the axis of the fuel pump. Since it arrange | positions in the position which pinches | interposes between the connection pipe parts provided in the base member, it can suppress more reliably that the bubble from a deaeration hole goes to the fuel outlet side.

1 is a side view of a motorcycle according to a first embodiment. It is a partially cutaway side view of a fuel tank. It is the figure which looked at the fuel supply apparatus from the 3 arrow direction of FIG. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is a perspective view which decomposes | disassembles and shows the attachment structure of the fuel supply apparatus to the bottom wall of a fuel tank. It is a bottom view of the upper cup seen from the 6-6 line arrow direction of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 4. It is the perspective view which looked at the base member from diagonally upward. It is a partially notched side view of the fuel tank of 2nd Embodiment. It is sectional drawing corresponding to FIG. 7 of 3rd Embodiment.

  Embodiments of the present invention will be described with reference to the accompanying drawings.

  A first embodiment of the present invention will be described with reference to FIGS. 1 to 8. First, in FIG. 1, a front fork 12 that supports a front wheel WF is operated at a front end of a body frame F of the motorcycle. It is supported in the direction that can be directed. The front end of the swing arm 14 that pivotally supports the rear wheel WR at the rear end portion is supported on the pivot plate 13 provided at the middle portion in the front-rear direction of the vehicle body frame F so as to be able to swing up and down. A rear cushion unit 16 is provided between the link mechanism 15 provided between the plates 13 and the vehicle body frame F.

  An internal combustion engine E disposed between the front wheel WF and the rear wheel WR is mounted on the vehicle body frame F, and an output of a transmission (not shown) housed in a crankcase 17 provided in the internal combustion engine E. Between the shaft 18 and the rear wheel WR, chain-type transmission means 20 including an endless chain 19 is provided.

  A fuel tank 21 positioned above the internal combustion engine E is mounted on the vehicle body frame F, and a tandem riding seat 22 positioned rearward of the fuel tank 21 is supported at the rear portion of the vehicle body frame F. The

  In FIG. 2, the fuel tank 21 is formed by joining the peripheral portions of an upper half 23 and a lower half 24 and can be divided into upper and lower parts, and the bottom of the lower half 24, that is, the bottom wall 25 of the fuel tank 21. A fuel supply device 26 for supplying the fuel in the fuel tank 21 to the internal combustion engine E side is attached to the front portion.

  3 to 5, the fuel supply device 26 includes a cylindrical pump housing 31 having a central axis that is elongated in the vertical direction, and a fuel pump 27 having a motor built in the pump housing 31. The fuel pump 27 has a base member 28 attached to the bottom wall 25 of the fuel tank 21 and a bottomed cylindrical shape whose upper end is closed and the fuel pump 27 is held between the base member 28 and the fuel pump 27. And an upper cup 29 coupled to the base member 28 and a pressure regulator 30 held by the upper cup 29 so as to be connected to the discharge port of the fuel pump 27.

  Referring also to FIG. 6, the upper cup 29 includes a cylindrical first tube portion 29a, a first flat surface portion 29b formed at the upper end of the first tube portion 29a, and a first tube portion 29a. A cylindrical second tube portion 29c that protrudes upward from the first flat surface portion 29b at a position deviated from the axis of the second tube portion 29c, a second flat surface portion 29d formed at the upper end of the second tube portion 29c, and a second tube portion 29c. And a protrusion 29e that protrudes upward from the second flat surface portion 29d at a position that is eccentric from the axis.

  The upper part of the pump housing 31 in the fuel pump 27 is inserted into the first cylinder part 29a and the second cylinder part 29c in the upper cup 29, and is a circular insertion hole formed by the second cylinder part 29c. The upper portion of the pump housing 31 is inserted into 33 so as to form an annular gap 32 between the outer peripheral surface thereof and the insertion hole 33.

  A first fitting recess 35 for fitting a discharge pipe portion 34 provided at the upper end portion of the pump housing 31 and a first regulator so as to fit the pressure regulator 30 are fitted inside the protrusion 29e. A second fitting recess 36 adjacent to the recess 35 is provided, and an annular first seal member 37 is interposed between the first fitting recess 35 and the discharge pipe portion 34, and the second fitting recess 36 and An annular second seal member 38 is interposed between the pressure regulators 30.

  The upper cup 29 has one end portion disposed at a position corresponding to the second fitting recess 36 and a first conduit portion 39a extending along the upper end of the protrusion 29e, and laterally from the protrusion 29. One end is connected to the other end portion of the first pipe portion 39a at a right angle at the protruding portion and extends vertically along the side surfaces of the protruding portion 29e and the second cylindrical portion 29c, and the other end portion is the first plane. A pipe line part 39 connected to the part 29b is formed in a substantially L shape and is provided integrally therewith, and in this pipe line part 39, a discharge port 40 at the upper end of the discharge pipe part 32 (see FIG. 4). And a passage 41 communicating with the pressure regulator 30 is formed.

  The upper cup 29 has a first discharge connecting pipe portion 44 extending downward from the first flat portion 29 b and having a lower end disposed below the lower end of the first tube portion 29 a. The first discharge connecting pipe portion 44 is disposed on the side of the lower portion of the fuel pump 27 so as to be integrated with the inner surface of the first cylinder portion 29a.

  Referring to FIGS. 7 and 8 together, the base member 28 is formed in a bottomed cylindrical shape with its lower end closed and is disposed below the bottom wall 25 of the fuel tank 21. And a flange portion 28b projecting laterally from the upper end of the bottomed cylindrical portion 28a and a portion of the lower portion of the fuel pump 27 that protrudes downward from the upper cup 29 while being formed in a cylindrical shape. A cylindrical wall portion 28c connected to the upper end of the bottomed cylindrical portion 28a is integrally provided.

  In order to attach the base member 28, an opening 46 having a diameter larger than that of the flange portion 28b is provided in the bottom wall 25 of the fuel tank 21, and the opening is formed so as to penetrate the cylindrical wall portion 28c. The entire outer periphery of a disc-shaped mounting plate 48 having a through hole 47 formed in a smaller diameter than the portion 46 at the center is welded to the lower surface of the bottom wall 25 at the periphery of the opening 46. Thus, the mounting plate 48 is formed to be thicker than the bottom wall 25 of the fuel tank 21 except for the outer peripheral portion 48a, but the portion to be welded to the bottom wall 25, that is, the outer peripheral portion 48a of the mounting plate 48. Is formed thin so as to have the same thickness as the bottom wall 25.

  Projection bolts 49, 49... Projecting downward through the mounting plate 48 are formed on the upper surfaces of a plurality of locations (four locations in this embodiment) spaced apart in the circumferential direction of the mounting plate 48 by projection welding. It is fixed.

  A set plate 50 through which the bottomed cylindrical portion 28a of the base member 28 is inserted is brought into contact with the lower surface of the flange portion 28b of the base member 28 from below. In this embodiment, cylindrical collars 51, 51... Through which the projection bolts 49, 49... Are inserted are welded, and the projection bolts 49 inserted through the collars 51, 51. , 49... Are respectively screwed into the nuts 52, 52.

  In addition, an annular protrusion 28d is provided on the upper surface of the flange portion 28b of the base member 28 so as to surround the cylindrical wall portion 28c below the mounting plate 48. The cylindrical wall portion 28c and the annular wall portion 28c The mounting groove 53 formed between the projecting portions 28d has an annular first pair of upper and lower lip portions 54a and 54b which are bent in contact with the lower surface of the mounting plate 48 and the upper surface of the flange portion 28b. A three-seal member 54 is attached.

  Thus, by tightening the nuts 52, 52... With the third seal member 54 interposed between the flange portion 28 b of the base member 28 and the mounting plate 48, the base member 28 is attached to the fuel tank 21. Although being attached to the bottom wall 25, a part of the collars 51, 51... Is arranged at a plurality of locations (four locations in this embodiment) spaced apart in the circumferential direction of the outer periphery of the flange portion 28b. Notches 55, 55...

  At a plurality of locations (three locations in this embodiment) spaced apart in the circumferential direction at the upper end of the cylindrical wall portion 28c, connecting arm portions 56... Extending toward the upper cup 29 are provided integrally. Engagement holes 57 are provided in the upper part of the arms 56. On the other hand, the lower side surface of the upper cup 29, that is, the side surface of the first cylindrical portion 29a accommodates a part of the connecting arm portion 56, so that the connecting arm portion 56 is connected to the outer side surface of the first cylindrical portion 29a from the outside. The recessed portions 58 are arranged so as to extend vertically, and the engaging protrusions 59 projecting from the upper portions of the recessed portions 58 are engaged with the engaging holes 57. The upper cup 29 and the base member 28 are coupled to the lower portion of the upper cup 29 so that the upper portion of the cylindrical wall portion 28c is connected.

  Meanwhile, a suction pipe portion 61 having a suction port 60 at the lower end portion is provided at the bottom portion of the pump housing 31 so as to protrude downward, and the inner surface of the lower closed end of the bottomed cylindrical portion 28a of the base member 28 is provided. The suction connection pipe portion 63 into which the suction pipe portion 61 is fitted via the annular fourth seal member 62 is integrally provided so as to protrude upward, and the upper end of the suction connection pipe portion 63 is provided. In addition, a portion of the bottom of the pump housing 31 around the suction pipe 61 is abutted and supported.

  One end of the bottomed cylindrical portion 28a is orthogonally connected to the lower portion of the suction connecting pipe portion 63 and extends in the radial direction of the bottomed cylindrical portion 28a, and the other end is the bottomed cylindrical portion 28a. A passage pipe portion 64 connected to the inner surface of the side wall and a first external connection pipe portion 65 projecting outward from the outer surface of the side wall of the bottomed cylindrical portion 28a on the extension of the passage pipe portion 64 are integrally provided. A passage 66 communicating with the suction port 60 of the fuel pump 27 is formed in the passage pipe portion 64 and the first external connection pipe portion 65 via the suction connection pipe portion 63.

  Further, on the inner surface of the lower closed end of the bottomed cylindrical portion 28a, a second discharge connecting pipe portion 68 fitted to the lower end portion of the first discharge connecting pipe portion 44 through an annular fifth seal member 67 is provided. The bottomed cylindrical portion 28a is integrally provided so as to be integrally connected to the inner surface of the side wall and protrude upward. A second external connection pipe 69 projecting outward is integrally provided on the outer surface of the side wall of the bottomed cylindrical part 28a at a position corresponding to the lower part of the second discharge connection pipe 68, and is provided for the second discharge. The connection pipe portion 68 and the second external connection pipe portion 69 are connected to the discharge port 40 of the fuel pump 27 via the passage 45 in the first discharge connection pipe portion 44 and the passage 40 in the pipe portion 39. A passage 70 is formed.

  One end of a pipe 71 such as a fuel hose is connected to the second external connection pipe 69, and the other end of the pipe 71 is a fuel injection valve 72 provided in the internal combustion engine E (see FIGS. 3 and 7). ) Etc.

  The upper cup 29 and the base member 28 are connected to each other with a contact portion between the upper end of the cylindrical wall portion 28c of the base member 28 and the lower end of the first cylindrical portion 29a of the upper cup 29 as a connection portion 74. The fuel pump 27 is sandwiched and held between the upper cup 29 and the base member 28 from above and below.

  In the cylindrical wall portion 28 c of the base member 28, a fuel storage portion 75 that introduces and stores the fuel sucked by the fuel pump 27 from the fuel tank 21 is stored in the base member 28 and the upper cup 29. It is formed so as to face the bottom surface of the fuel tank 27 held therebetween.

  On the other hand, between the cylindrical wall portion 28c of the upper cup 29 and the base member 28 and the pump housing 31 of the fuel pump 27, the insertion hole 33 in the second cylindrical portion 29c of the upper cup 29 is formed. A gap including an annular gap 32 formed between the inner circumferential surface and the upper outer circumferential surface of the pump housing 31 is formed. The gap is held by the pressure held in the upper cup 29. It functions as an excess fuel passage 76 that guides excess fuel from the regulator 30 to the fuel reservoir 75. That is, the surplus fuel derived from the pressure regulator 30 flows downward in the upper cup 29 without being returned from the upper cup 29 to the fuel tank 21 side, and is guided to the fuel storage portion 75.

  Of the upper cup 29 and the base member 28, at least one fuel introduction hole 77 for introducing the fuel in the fuel tank 21 into the fuel storage portion 75 is provided only in the cylindrical wall portion 28 c of the base member 28. The fuel tank 21 is provided so as to be directed to the side of the motorcycle, for example, the left side when the fuel tank 21 is mounted on the motorcycle.

  The fuel introduction hole 77 is formed in a slit shape by cutting out a part of the cylindrical wall portion 28c, and is formed in a slit shape that is long in the vertical direction.

  Incidentally, the first and second external connecting pipe portions 65 and 69 protrude from the outer surface of the side wall of the bottomed cylindrical portion 28a so as to be aligned on one diameter line of the bottomed cylindrical portion 28a of the base member 28. In the circumferential direction, the fuel storage portion is disposed on the side wall of the bottomed cylindrical portion 28a at a position slightly closer to the second external connection pipe portion 69 side from the central portion of the first and second external connection pipe portions 65 and 69. A fuel outlet 78 that opens to 75 is provided, and a third external connecting pipe 81 that forms a passage 80 that communicates with the fuel outlet 78 is formed so as to protrude laterally from the bottomed cylindrical portion 28a. Provided.

  One end of a pipe 82 such as a fuel hose is connected to the third external connection pipe 81, and the other end of the pipe 82 is outside the base member 28 and the upper cup 29 and outside the fuel tank 21. It is connected to the filter 79 to be arranged. Further, the other end of the pipe 83 such as a fuel hose connected to the filter 79 at one end is connected to the first external connection pipe 65.

  That is, the fuel in the fuel tank 21 is introduced into the fuel reservoir 75 through the fuel introduction hole 77, and the purified fuel guided to the filter 79 from the fuel outlet 78 is guided to the inlet 60 of the fuel pump 27. become.

  Incidentally, as shown in FIG. 7, the fuel pump 27 has a deaeration hole 84 on the bottom surface thereof, and the fuel guided from the filter 79 is projected on a plane orthogonal to the axis of the fuel pump 27. The fuel outlet port 78 and the deaeration hole 84 are disposed at a position sandwiching the suction connecting pipe portion 63 provided integrally with the bottomed cylindrical portion 28a of the base member 28 so as to be guided to the fuel pump 27 side. Is done.

  Moreover, in the bottomed cylindrical portion 28 a of the base member 28, a partition wall portion 85 separating the deaeration hole 84 and the fuel outlet port 78 is a substantially U-shaped portion opened to the opposite side of the fuel outlet port 78. At a position corresponding to the deaeration hole 84.

  As shown in FIGS. 3 to 6, the side surface of the first pipeline portion 39 a in the pipeline portion 39 that is continuous with the protrusion 29 e in the upper cup 29 extends to the side opposite to the second pipeline portion 39 b. A support arm portion 88 is integrally provided continuously, and a case 90 of a fuel gauge 89 for detecting the remaining fuel amount in the fuel tank 21 is attached to the tip end portion of the support arm portion 88. The fuel gauge 89 includes an arm 91 whose base end portion is rotatably supported by the case 90 and a float 92 attached to the tip end portion of the arm 91, and the fuel in the fuel tank 21. The float 92 moves up and down in response to the change in the remaining amount, and the arm 91 rotates in response thereto, so that the remaining amount of fuel in the fuel tank 21 is detected.

  A concave portion 97 is provided in the first cylindrical portion 29a of the upper cup 29 so as to be recessed inward, and a concave portion 98 corresponding to the concave portion 97 is provided in the cylindrical wall portion 28c of the base member 28 inwardly. It is done. A pair of conductors 93 and 94 connected to the fuel gauge 89 are guided to the recess 98 of the base member 28 through the recess 97 of the upper cup 29 and connected to a terminal (not shown) disposed in the recess 98. Connection terminals 95 and 96 are provided at the other end portions of the conducting wires 93 and 94.

  On the other hand, a pair of conducting wires 99 and 100 connected to the fuel pump 27 in the upper cup 29 are positioned on the side of the pressure regulator 30 and above the fuel pump 27 so that the upper cup 29 In this embodiment, the insertion holes 101, 102 are formed on the second flat portions 29 d on both sides of the protrusion 29 e in the upper cup 29. 102 is provided.

  Conductive wires 99, 100 having one end connected to the fuel pump 27 are recessed in the base member 28 via the recessed portion 97 of the upper cup 29 in the same manner as the conductive wires 93, 94 connected to the fuel gauge 89. Connection terminals 103 and 104 led to 98 and connected to terminals (not shown) arranged in the recess 98 are provided at the other ends of the conductive wires 99 and 100.

  Further, as shown in FIG. 3, FIG. 7 and FIG. 8, a portion of the base member 28 corresponding to the concave portions 97 and 98 of the bottomed cylindrical portion 28a protrudes laterally from the side wall of the bottomed cylindrical portion 28a. The connector portion 105 is integrally provided so as to be disposed outside the fuel tank 21 when the fuel supply device 26 is attached to the fuel tank 21, and the connection terminals 95, 96 are provided in the connector portion 105. , 103, 104 are individually connected to connection terminals (not shown).

  Moreover, at least one of the inner end blocking walls of the recess 98 provided in the cylindrical wall portion 28c of the base member 28 is in contact with and supported by the lower side surface of the pump housing 31 of the fuel pump 27 (this embodiment). In the embodiment, the support wall 106 is formed in an arc shape so as to form one support wall 106, and the support wall 106 is formed integrally with the cylindrical wall 28c.

  Next, the operation of the first embodiment will be described. A cylindrical wall portion 28c formed in a cylindrical shape so as to cover a portion of the lower portion of the fuel pump 27 that protrudes downward from the upper cup 29 is provided as an upper portion. At least one (one in the first embodiment) is provided integrally with the base member 28 so as to be connected to the lower portion of the cup 29 and introduces fuel in the fuel tank 21 into the fuel reservoir 75. ) In the upper cup 29 and the base member 28 of the base member 28 so that the fuel introduction hole 77 is directed to the left side of the motorcycle when the fuel tank 21 is mounted on the motorcycle. Therefore, even if the remaining amount of fuel in the fuel tank 21 is small, the fuel can be easily taken into the fuel reservoir 75 and the fuel taken into the fuel reservoir 75 can be It can also be difficult to return to the fuel tank 21 when motorcycle acceleration or deceleration, the fuel held in the fuel storage portion 75 can be more reliably fastened to the fuel reservoir 75.

  Further, excess fuel from the pressure regulator 30 held in the upper cup 29 is formed in the base member 28 between the upper cup 29 and the cylindrical wall portion 28 c and the pump housing 31 of the fuel pump 27. Since the gap functioning as the surplus fuel passage 76 that leads to the fuel storage portion 75 is formed, surplus fuel from the pressure regulator 30 can be directly taken into the fuel storage portion 75 via the surplus fuel passage 76, and the fuel pump 26 Since the fuel introduction hole is not provided in the upper cup 29 formed in a bottomed cylindrical shape with the upper end closed so as to cover the entire circumference of the fuel, the return of surplus fuel to the fuel tank 21 side is suppressed as much as possible. be able to.

  Further, since the fuel introduction hole 77 is formed in a slit shape by cutting out a part of the cylindrical wall portion 28 c, the fuel introduction hole 77 can be easily formed in the cylindrical wall portion 28 c connected to the upper cup 29. In addition, since the fuel introduction hole 77 is formed in a vertically long slit shape, the fuel in the fuel storage portion 75 can be prevented from returning into the fuel tank 21 through the fuel introduction hole 77.

  The lead wires 99 and 100 connected to the fuel pump 30 are inserted from the insertion holes 101 and 102 provided in the upper portion of the upper cup 29 so as to be positioned on the side of the pressure regulator 30 and above the fuel pump 27. Since it is led out of the upper cup 29, it is not necessary to secure a space for arranging the conductors 99 and 100 in the upper cup 29 below the pressure regulator 30, and surplus fuel from the pressure regulator 30 is guided to the fuel storage portion 75. It becomes easy to form the surplus fuel passage 76.

  The base member 28 has at least one (one in this embodiment) support wall 106 integrally connected to the cylindrical wall 28 c to support the lower side surface of the pump housing 31 in the fuel pump 27. Thus, the fuel pump 27 can be supported more reliably.

  Further, the bottom of the base member 28 is provided so that a fuel outlet 78 that opens to the fuel reservoir 75 facing the bottom surface of the fuel pump 27 is connected to the filter 79 disposed outside the base member 28 and the upper cup 29. A partition wall portion 85 provided on the side wall of the cylindrical portion 28a and separating the deaeration hole 84 provided on the bottom surface of the fuel pump 27 and the fuel outlet port 78 is provided integrally with the base member 28, and thus is discharged from the deaeration hole 84. It is possible to easily suppress the air bubbles flowing toward the fuel outlet 78 side.

  Further, the base member 28 is provided with a suction connecting pipe portion 63 that guides the fuel guided from the filter 79 to the fuel pump 27 side, and the fuel outlet port 78 and the deaeration hole 84 are planes orthogonal to the axis of the fuel pump 27. Since the intake connecting pipe portion 63 is disposed between the intake pipes 63 on the projection, the air bubbles from the deaeration holes 84 can be more reliably prevented from moving toward the fuel outlet 78 side.

  FIG. 9 shows a second embodiment of the present invention. The parts corresponding to those of the first embodiment are indicated by the same reference numerals, and the detailed description is omitted. .

  The fuel tank 108 is formed by joining the peripheral portions of the upper half 109 and the lower half 110 and can be divided into upper and lower parts. The fuel tank 108 is disposed at the bottom of the lower half 109, that is, at the rear of the bottom wall 111 of the fuel tank 108. A fuel supply device 26 for supplying the internal fuel to the internal combustion engine E (see the first embodiment) side is attached in the same manner as in the first embodiment.

  In the second embodiment, the same effect as that of the first embodiment can be obtained.

  As a third embodiment of the present invention, as shown in FIG. 10, the fuel in the fuel tank 21 is fueled only in the cylindrical wall portion 28 c of the base member 28 among the upper cup 29 and the base member 28. A pair of fuel introduction holes 77 and 77 for introduction into the reservoir 75 may be provided so as to be directed to the left side and the right side of the motorcycle when the fuel tank 21 is mounted on the motorcycle.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, the present invention is not limited to a motorcycle fuel supply device, and can be widely applied as a vehicle fuel supply device.

  In addition, the present invention is not limited to the fuel supply device in which the filter is disposed outside the fuel tank, and the present invention can also be applied to a device in which the filter is accommodated and disposed in a fuel storage portion formed in the base member.

21, 108 ... Fuel tanks 25, 111 ... Bottom wall 26 ... Fuel supply device 27 ... Fuel pump 28 ... Base member 28c ... Cylindrical wall 29 ... Upper cup 30 ... Pressure regulator 31 ... Pump housing 40 ... Discharge port 63 ... Suction connection conduit 75 ... Fuel storage part 76 ... Excess fuel passage 77 ... Fuel introduction hole 78 ... Fuel outlet 79 ... Filter 84 ... Deaeration hole 85 ... Partition 99, 100 ... Conductive wires 101, 102 ... Insertion hole 106 ... Support wall

Claims (7)

  A fuel pump (27) having a cylindrical pump housing (31) whose central axis is elongated in the vertical direction; a base member (28) attached to the bottom wall (25, 111) of the fuel tank (21, 108); The base member (28) is formed in a bottomed cylindrical shape with its upper end closed and covers the fuel pump (27) so as to hold the fuel pump (27) between the base member (28). An upper cup (29) coupled to the fuel pump (27), and a pressure regulator (30) held by the upper cup (29) so as to be connected to the discharge port (40) of the fuel pump (27), A fuel storage portion (75) is formed in the base member (28) for introducing and storing the fuel sucked by the fuel pump (27) from the fuel tank (21, 108). In the dual-purpose fuel supply device, a cylindrical wall portion (28c) formed in a cylindrical shape so as to cover a portion of the lower portion of the fuel pump (27) projecting downward from the upper cup (29) includes the upper Connected to the lower part of the cup (29) and provided integrally with the base member (28), at least for introducing the fuel in the fuel tank (21, 108) into the fuel reservoir (75) One fuel introduction hole (77) is directed to the side of the vehicle when the fuel tank (21, 108) is mounted on the vehicle so that the base of the upper cup (29) and the base member (28) is the base. A fuel supply device for a vehicle, which is provided on the cylindrical wall portion (28c) of the member (28).   Excess fuel from the pressure regulator (30) held in the upper cup (29) is interposed between the upper cup (29) and the cylindrical wall portion (28c) and the pump housing (31). The vehicular fuel supply device according to claim 1, wherein a gap functioning as an excess fuel passage (76) leading to the fuel reservoir (75) is formed.   The fuel supply device for a vehicle according to claim 1 or 2, wherein the fuel introduction hole (77) is formed in a slit shape by notching a part of the cylindrical wall portion (28c).   The fuel supply device for a vehicle according to claim 3, wherein the fuel introduction hole (77) is formed in a vertically long slit shape.   Conductor wires (99, 100) connected to the fuel pump (27) are positioned on the side of the pressure regulator (30) and above the fuel pump (27) so that the upper cup (29) The fuel supply device for a vehicle according to claim 1, wherein the fuel supply device for a vehicle is led out of the upper cup (29) from an insertion hole (101, 102) provided in an upper portion.   A fuel outlet (78) that opens to the fuel reservoir (75) that faces the bottom of the fuel pump (27) is disposed outside the base member (28) and the upper cup (29) ( 79) is provided on the side wall of the base member (28) so as to be connected to the partition member, and the fuel pump (27) separates the deaeration hole (84) provided on the bottom surface and the fuel outlet port (78). The vehicle fuel supply device according to claim 1, wherein (85) is provided integrally with the base member (28).   The base member (28) is provided with a suction connecting pipe (63) for guiding the fuel guided from the filter (79) to the fuel pump (27) side, and the fuel outlet (78) and the desorption port are provided. The pore (84) is arranged at a position sandwiching the intake connecting pipe portion (63) between each other on a projection view on a plane orthogonal to the axis of the fuel pump (27). 7. The fuel supply device for a vehicle according to 6.

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