JP2010144553A - Fuel supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel supply system attaching a lid member to the best position according to the shape of a fuel tank while positioning the suction opening of a fuel pump supported by the lid member to a lower portion in the fuel tank. <P>SOLUTION: In this fuel supply system, the fuel pump 40 is supported inside of the fuel tank 30 by the lid member 50 closing the opening of the fuel tank 30 and fluid-tightly fastened, a filter is provided in the suction opening 43 of the fuel pump 40, and fuel delivered from the delivery port of the fuel pump 40 is made to flow through the lid member 50 and is supplied to an internal combustion engine. A stay 55 projecting from the inner surface of the lid member 50 to the inside of the fuel tank extends downward toward the lower portion in the fuel tank 30, the fuel pump 40 is supported by the end of the stay 55 with the suction opening 43 positioned at a lower end, and the filter 45 is arranged along the longitudinal direction of the end of the stay 55. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel supply device that supplies fuel from a fuel tank to an internal combustion engine.

  A fuel supply device in which a fuel pump is disposed in a fuel tank has already been disclosed (see, for example, Patent Document 1).

JP 2008-82263 A

  In the fuel supply device disclosed in Patent Document 1, a fuel pump is erected on a lid member that closes an opening formed in a bottom plate of a fuel tank, and a filter is provided at an inlet provided at a lower portion of the fuel pump. It has been.

  Fuel in the fuel tank is sucked from a suction port at the bottom of the fuel pump in the fuel tank through a filter, discharged from a fuel discharge port provided outside the lid member, and supplied to the internal combustion engine through a fuel pipe. .

  Since the fuel pump that sucks the fuel in the fuel tank is erected on the lid member, the lid member needs to be installed at the lowest place on the bottom plate of the fuel tank, so that the installation location is limited and the flexibility of the installation position Is small.

  In addition, the opening portion of the bottom plate of the fuel tank to which the lid member is attached needs a sufficient area to attach the lid member on which the fuel pump is erected. Depending on this, the shape of the fuel tank is affected, and the degree of freedom of the shape of the fuel tank is also limited.

  The present invention has been made in view of the above points, and the object of the present invention is to freely install the lid member in a place where the suction port of the fuel pump supported by the lid member is positioned in the lower part of the fuel tank. The point is to provide a fuel supply device that can be attached to the optimal position according to the shape of the fuel tank.

  In order to achieve the above object, according to the first aspect of the present invention, a fuel pump is supported in the fuel tank by a lid member that is closed in a liquid-tight manner by closing the opening of the fuel tank, and an intake port of the fuel pump. The fuel supply device is provided with a filter and supplies fuel discharged from the discharge port of the fuel pump to the internal combustion engine through the lid member. A stay protruding from the inner surface of the lid member into the fuel tank is provided. The fuel pump extends downward toward the lower part in the fuel tank, the fuel pump is supported by the stay on the tip side with the suction port positioned at the lower end, and the filter extends along the longitudinal direction of the tip side of the stay. It was set as the fuel supply apparatus arrange | positioned.

  According to a second aspect of the present invention, in the fuel supply device of the first aspect, the stay is formed as an elongated flat plate member elongated in the extending direction, and the fuel pump is arranged along one plate plane of the stay. The filter is disposed on the other plate plane.

  According to a third aspect of the present invention, in the fuel supply device of the second aspect, the lid member closes the opening formed in the bottom plate of the fuel tank, and the stay protruding from the inner surface of the lid member is The stay has a shape that is bent in a square shape on the plate plane, and the stay is disposed such that a tip end side bent with the plate plane vertical is extended obliquely downward, and the fuel pump is disposed on the tip end side of the stay. It is supported along the longitudinal direction.

  According to a fourth aspect of the present invention, in the fuel supply device of the third aspect, the elastic boot member having a bottomed cylindrical shape and having a communication hole in the lower portion is supported along the tip side extending obliquely downward of the stay. The fuel pump and the lower part of the filter are accommodated and supported by the stay.

  According to a fifth aspect of the present invention, in the fuel supply device according to any one of the first to fourth aspects, the filter is disposed at a position lower than the lid member, and fuel is supplied from the filter to the fuel pump. The suction connecting pipe to be supplied is inclined downward from upstream to downstream.

  A sixth aspect of the present invention is the fuel supply apparatus according to any one of the first to fifth aspects, wherein a plurality of the filters are disposed around the fuel pump.

  According to the fuel supply device of the first aspect, the stay projecting into the fuel tank from the inner surface of the lid member extends downward toward the lower portion of the fuel tank, and the fuel pump is positioned at the lower end of the suction port. Since the filter is disposed along the longitudinal direction of the distal end side of the stay, the stay protruding from the lid member is matched with the shape of the fuel tank. By extending downward toward the lower part, the fuel pump suction port is positioned in the lower part of the fuel tank so that the fuel can be stably supplied to the internal combustion engine E even if the amount of stored fuel is small. In addition, the fuel pump is not directly supported by the lid member but supported by the stay, so the degree of freedom of the mounting position of the lid member is large, and the lid member is placed at the optimum position according to the shape of the fuel tank. Can be attached.

  According to the fuel supply device of the second aspect, the stay is an elongated plate member elongated in the extending direction, the fuel pump is disposed along one plate plane of the stay, and the other plate plane is provided with the fuel pump. Since the filter is arranged, the fuel pump and the filter can be gathered in the vicinity of the stay in a compact manner, and the opening to be inserted into the fuel tank can be reduced to increase the degree of freedom of the mounting position of the lid member. it can.

  According to the fuel supply device of the third aspect, the lid member closes the opening formed in the bottom plate of the fuel tank, and the stay protruding from the inner surface of the lid member is bent into a square shape on the plate plane. In this shape, the front end side bent with its plate plane vertical is arranged so as to extend obliquely downward, and the fuel pump is supported along the longitudinal direction on the front end side. Even if the fuel pump is supported on the tip side that extends obliquely below the stay to be placed at a low position in the tank, the stay is in a posture in which the plate plane is maintained vertically, so that the strength of the stay can be ensured. .

  According to the fuel supply device of claim 4, the elastic boot member having a bottomed cylindrical shape and having a communication hole in the lower part is supported along the tip side extending obliquely downward of the stay and the lower part of the filter Since the fuel pump and the lower part of the filter supported on the tip of the stay are immersed in the fuel accumulated in the elastic boot member, the fuel tank shakes together with the vehicle body and the fuel inside Even if the liquid level is greatly swollen, the liquid level with a small fuel area in the elastic boot member has a small vertical fluctuation, and the possibility that the inlet of the lower part of the fuel pump is exposed to the outside of the fuel is extremely low. Stable fuel supply is possible.

  In addition, with the bottom of the fuel pump supported by the stay and the lower part of the filter accommodated by the bottomed cylindrical elastic boot member, it is inserted through the opening formed in the bottom plate of the fuel tank and inserted into the lower part of the fuel tank. Therefore, the elastic boot member prevents the fuel pump and the filter from directly contacting the inner wall surface of the fuel tank, and the fuel pump, the filter, and the inner wall of the fuel tank can be protected.

  According to the fuel supply device of the fifth aspect, the filter is disposed at a position lower than the lid member, and the suction connection pipe that supplies fuel from the filter to the fuel pump is inclined downward from upstream to downstream. Therefore, since the fuel filtered by the filter flows down to the fuel pump side, the suction by the fuel pump is performed more smoothly, and the loss of the pump can be reduced.

  According to the fuel supply device of the sixth aspect, since a plurality of filters are disposed around the fuel pump, a large filtration area can be secured with a simple and compact configuration.

Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
A motorcycle 1 equipped with a fuel tank 30 incorporating a fuel supply apparatus F according to the present invention is shown in FIG.
In addition, in this specification or a claim, up and down, front and rear, and left and right mean up and down, front and rear, and left and right when based on the vehicle body.

  The body frame of the motorcycle 1 includes a head pipe 2 at the front end, a main frame 3 connected to the head pipe 2 and extending rearward, a pair of left and right down frames 4 and 4 extending diagonally downward, and a main frame. A pair of left and right seat rails 5 and 5 connected to the rear end of the main frame 3 and a pair of left and right center frames 6 connecting the rear end of the main frame 3 and the lower ends of the down frames 4 and 4. 6 and a pair of left and right subframes 7 and 7 that connect the rear lower portion of the center frames 6 and 6 and the rear ends of the seat rails 5 and 5.

A front fork 8 having a front wheel 10 pivotally supported at the lower end and a handle 9 attached to the upper end is supported on the head pipe 2 so as to be steerable.
A swing arm 13 is swingably attached via pivot shafts 12 to pivot plates 11 and 11 provided at the lower rear portions of the center frames 6 and 6.
A rear wheel 15 is pivotally supported at the rear end of the swing arm 13.

A power unit P that generates power for driving the rear wheels 15 as drive wheels is suspended from the down frames 4 and 4 and the center frames 6 and 6.
The power unit P is integrally provided with a horizontally disposed internal combustion engine E with a crankshaft oriented in the left-right direction (vehicle width direction) and a transmission T behind the engine.

  Above this power unit P, a fuel tank 30 is supported on the main frame 3 so as to straddle the left and right of the main frame 3 from above, and a tandem seat 16 is attached to the seat rails 5, 5 immediately after the fuel tank 30. It is supported and provided.

  The base end of the side stand 18 is pivotally supported by a bracket 17 provided at the rear lower part of the left center frame 6. When the side stand 18 is stood to support the motorcycle 1, the vehicle body is inclined to the left and supported. Is done.

A throttle body 23 is connected to an intake pipe 21 connected to the rear part of the cylinder head 20 which is slightly inclined forward of the internal combustion engine E and extends rearward, and a connecting tube 24 is connected between the throttle body 23 and an air cleaner 25 behind it. is doing.
A fuel injection valve 22 is attached to the intake pipe 21 (see FIG. 2).
An exhaust pipe 26 is connected to the front portion of the cylinder head 20, and the exhaust pipe 26 is connected to the muffler 27 by going around the lower surface of the power unit P rearward.

  The fuel tank 30 is formed by combining an inner bottom plate 32 having an inverted U shape in front view across the main frame 3 and an upper lid plate 31 covering the outer side, and a seam flange at the outer periphery of the bottom plate 32 and the upper lid plate 31. A tank is formed by welding together.

FIG. 3 is a perspective view of the inside of the fuel tank 30 seen through the upper lid plate 31 as seen from the diagonally rear right side. The upper lid plate 31 in the rear half of the fuel tank 30 is indicated by a two-dot chain line. 32 is shown as a solid line.
In the bottom plate 32, a center bottom wall portion 32c in the vehicle width direction bulges upward from the left and right bottom wall portions 32a and 32a through the inner wall portions 32b and 32b so as to straddle one main frame 3 from above.

The central bottom wall 32c extends obliquely downward and obliquely downward along the main frame 3 extending slightly obliquely downward to the rear of the head pipe 2 and then wraps behind the rear end of the main frame 3. A steeply inclined portion 32cs is formed by bending downward, and a lower end of the steeply inclined portion 32cs is bent rearward to form a horizontal rear end portion 32cr extending substantially horizontally.
A fuel reservoir recess 33 is formed in which the center of the horizontal rear end portion 32cr is slightly recessed and becomes a lower portion.

An oblong opening 34 that is elongated in the front-rear direction is formed in a portion of the center bottom wall portion 32c immediately before moving to the steeply inclined portion 32cs, and an outer peripheral portion of the opening 34 is an annular mounting seat 35.
A fuel pump 40 inserted into the fuel tank 30 from below through the opening 34 of the central bottom wall portion 32c is attached along the steeply inclined portion 32cs.

The fuel pump 40 is supported by a stay 55 that protrudes from the inner surface of the lid member 50 that closes the opening 34 and is bent and extended.
Referring to FIG. 4, the lid member 50 is an oblong member having substantially the same shape as the annular mounting seat 35, and is attached to the lower surface of the annular mounting seat 35 so as to substantially match the annular mounting seat 35.
The lid member 50 has a plurality of mounting holes 50h for that purpose.

A stay 55 projects from the center of the inner surface of the lid member 50.
The stay 55 is a long flat plate member elongated in the extending direction, and both side edges of the long flat plate portion 55a are bent in the same direction to form side plate portions 55s and 55s.
The stay 55 has a shape that is bent into a square shape on the plate plane of the long flat plate portion 55a.

  The base end of the stay 55 attached to the inner surface of the lid member 50 forms a base end mounting plate portion 55b in which the side plate portions 55s and 55s are bent and connected to each other, and the opposite tip side is the side plate portion 55s and 55s. Are wide and bent outward to form the mounting pieces 55c and 55c.

The base end mounting plate portion 55b of the stay 55 as described above is welded to the center of the inner surface of the lid member 50, and the stay 55 is projected.
The plate plane of the long flat plate portion 55 a of the stay 55 is perpendicular to the inner surface of the lid member 50.
The stay 55 protrudes obliquely in the major axis direction of the oval lid member 50, and the tip side bent into a square shape extends obliquely downward and rearward from the same plane as the inner surface of the lid member 50. .

  When the lid member 50 is attached to the annular mounting seat 35, the stay 55 projecting from the inner surface of the lid member 50 extends backward as shown in FIG. The bottom plate 32 of the tank 30 extends obliquely downward along the steeply inclined portion 32cs of the central bottom wall portion 32c.

Referring to FIG. 4, a fuel pump 40 having a cylindrical shape is disposed along the left side plate plane of the long plate portion 55a on the distal end side that is bent into the square shape of the stay 55.
The side plate portions 55s and 55s of the stay 55 are formed by bending the upper and lower side edges of the long flat plate portion 55a to the left side, and the fuel pump 40 disposed along the left plate plane of the long flat plate portion 55a includes: It is sandwiched between the upper and lower side plate portions 55s and 55s.

  A hollow disk-like support base 56 is fixed to the lower end surface of the fuel pump 40, and projecting pieces 56c, 56c extending in opposite directions of the support base 56 are attachment pieces at the tips of the side plate portions 55s, 55s of the stay 55. The fuel pump 40 is supported on the stay 55 along the left side plate plane by being applied to 55c, 55c from below and fastened by screws 57.

  A suction port portion 41 protruding from the lower end surface of the fuel pump 40 passes through the hollow portion of the support base 56, and a suction connection pipe 42 extends rightward from the suction port portion 41, and the suction connection pipe 42 is connected to the stay 55. A fuel suction port 43 is provided at a position extending below the long flat plate portion 55a to the right.

That is, the fuel that has been suction filtered by the filter 45 flows from the fuel suction port 43 to the suction port portion 41 connected to the mask of the fuel pump 40 via the suction connection pipe 42.
The suction connection pipe 42 is inclined downward from the upstream toward the downstream.
Therefore, the fuel filtered by the filter 45 flows down to the fuel pump 40 side, so that the suction by the fuel pump 40 is performed more smoothly, and the loss of the pump can be reduced.

An opening of a filter 45 formed in a bag shape using a nonwoven fabric is joined to the fuel suction port 43 so that only the inside of the bag-shaped filter communicates with the inside of the fuel suction port 43, and the fuel suction port 43 is a filter 45. It has a covered structure.
The shape of the bag-like filter 45 is maintained by an internal frame (not shown) formed inside.

  The lower part of the inner frame is fixed to the fuel suction port 43, and the distal end side of the long flat plate portion 55a of the stay 55 is extended obliquely upward along the right side plate plane. Therefore, the inner frame is supported by the inner frame. The filter 45 has a flat bag shape that is long along the long flat plate portion 55a of the stay 55 and has the same width as the long flat plate portion 55a (see FIG. 4).

  Accordingly, the fuel pump 40 supported by the stay 55 is disposed along the left side plane on the front end side of the long flat plate portion 55a bent in the square shape of the stay 55, and along the other right side plane. Thus, the filter 45 is supported by the fuel inlet 43 of the fuel pump 40 and disposed.

A discharge port part 46 extends from the upper part of the fuel pump 40, and a fuel outlet pipe 47 is connected to the discharge port part 46.
The fuel outlet pipe 47 is bent into a square shape from the discharge port portion 46 along the stay 55 and extends to the center of the lid member 50. The fuel outlet tube 47 penetrates the lid member 50 and protrudes to the outside. A connecting end 47c is formed in the upper part.

A pressure regulator 48 is provided at the lower portion of the discharge port portion 46 in the upper part of the fuel pump 40.
The pressure regulator 48 includes a fuel discharge port 48a that discharges surplus fuel, and the fuel discharge port 48a is directed slightly forward in the downward direction.

  As described above, the bottom of the fuel pump 40 and the filter 45 supported along the leading end side of the stay 55 projecting from the inner surface of the lid member 50 is formed into a bottomed cylindrical elastic boot. The member 60 is accommodated.

As shown in FIG. 4, the elastic boot member 60 is made of synthetic rubber and extends upward from the bottomed cylindrical part 61 and the bottomed cylindrical part 61 that accommodate the lower parts of the fuel pump 40 and the filter 45. The fuel recovery passage 62 is mainly configured.
The bottomed cylindrical portion 61 is formed of a cylindrical wall having a substantially square cylindrical shape that opens upward from the bottom wall. When the bottom wall is in a horizontal posture, the cylindrical wall extends obliquely upward and forward from the bottom wall.

A communication hole 61h is formed in a lower portion of a corner portion where the left side wall and the rear wall of the rectangular cylindrical wall intersect.
Mounting pieces 61e and 61e protrude symmetrically upward from the respective upper end edges of the opposite left and right side walls of the bottomed cylindrical portion 61, and slits 61es and 61es are formed in the mounting pieces 61e and 61e.

The right half of the front wall of the bottomed cylindrical portion 61 extends upward to form a fuel recovery passage portion 62.
The fuel recovery passage portion 62 extends upward from the right edge of the front wall of the bottomed tubular portion 61, then bends leftward and then extends further upward to form a passage bottom wall 62a in a crank shape. A peripheral wall 62s is formed on the peripheral edge of the passage bottom 62a by bending backward.

Therefore, the fuel recovery passage portion 62 forms a flat channel-like passage by the passage bottom wall 62a and the peripheral wall 62s, and the passage communicates with the inside of the bottomed tubular portion 61.
The upper part of the fuel recovery passage portion 62 is shifted to the left side with respect to the bottomed tubular portion 61, moves to the right as it goes downward, and continues to the right half of the bottomed tubular portion 61.
A mounting piece 62e protrudes from the edge of the left side wall of the peripheral wall 62s, and a slit 62es is formed in the mounting piece 62e.

Note that support plates 58 and 59 are welded to the stay 55 to which the elastic boot member 60 is attached at two front and rear positions on the front end side that are bent into a hem of the upper side plate portion 55s.
The front support plate 58 is a short rectangular plate piece, the base end is welded to the side plate portion 55s and protrudes to the left, and the locking claw 58c protrudes forward and backward at the tip.
The rear support plate 59 is a long rectangular plate piece, the center of which is welded to the side plate portion 55s and protrudes left and right, and the locking claws 59c protrude forward and backward at both ends thereof.

  When the bottomed cylindrical portion 61 of the elastic boot member 60 is covered from below the fuel pump 40 and the filter 45 supported along the distal end side bent at the hem of the stay 55, as shown in FIG. The lower half of the fuel pump 40 and the filter 45 is accommodated in the bottomed cylindrical portion 61, and the fuel recovery passage portion 62 is formed along the upper half of the fuel pump 40 and the filter 45 and the inclined lower surface of the discharge port portion 46. Be placed.

The upper part of the inclined fuel recovery passage 62 is located on the left side of the stay 55 (on the side where the fuel pump 40 is located), and the lower part is located on the right side of the stay 55 (on the side where the filter 45 is located). Located in.
The fuel discharge port 48 a of the pressure regulator 48 provided in the discharge port portion 46 at the upper portion of the fuel pump 40 faces the passage bottom wall 62 a at the upper end portion of the fuel recovery passage portion 62.

  Therefore, surplus fuel is discharged from the fuel discharge port 48a of the pressure regulator 48 to the upper portion of the fuel recovery passage portion 62, and the discharged surplus fuel is guided to the inclined fuel recovery passage portion 62 and flows to the right side and flows into the bottom. It is collected on the right side in which the filter 45 inside the cylindrical portion 61 is accommodated.

  Thus, after covering the bottomed cylindrical part 61 of the elastic boot member 60 on the lower part of the fuel pump 40 and the filter 45, the slits 61es of the left and right mounting pieces 61e, 61e projecting upward from the bottomed cylindrical part 61 , 61es are inserted and locked with locking claws 59c, 59c at both left and right ends of the support plate 59 welded to the stay 55, and the bottomed cylindrical portion 61 is suspended and supported.

  Further, the attachment piece 62e protruding from the fuel recovery passage portion 62 of the elastic boot member 60 is wound around the upper portion of the fuel pump 40, and the left end locking claw 58c of the support plate 58 welded to the stay 55 to the slit 62es at the tip. Then, the fuel pump 40 is fixed to the stay 55 (see FIG. 5).

  As described above, the opening formed in the central bottom wall portion 32c of the bottom plate 32 of the fuel tank 30 in a state where the elastic boot member 60 accommodates the lower portion of the fuel pump 40 and the filter 45 supported on the distal end side of the stay 55. The bottomed cylindrical portion 61 of the elastic boot member 60 is inserted from 34 at the top and is introduced toward the fuel reservoir recess 33 which is the lower portion in the fuel tank 30.

  Then, referring to FIG. 2, when the lid member 50 is brought into contact with the annular mounting seat 35 on the outer periphery of the opening 34 in a predetermined positional relationship via the seal member 70 to close the opening 34, the lid member 50 protrudes from the annular mounting seat 35. Since the plurality of bolts 71 penetrate through the mounting holes 50h of the lid member 50, the lid member 50 closes the opening 34 by screwing and tightening the nut 72 to the bolt 71, so that the fuel tank 30 A stay 55 fixed to the bottom plate 32 and projecting from the inner surface of the lid member 50 extends backward in the fuel tank 30, bends in a U-shape, and extends obliquely downward along the steeply inclined portion 32cs of the bottom plate 32. The position has reached the fuel reservoir recess 33.

  Therefore, as shown in FIG. 2, the fuel tank 30 and the filter 45 attached along the leading end of the stay 55 bent into the U-shape are the left and right centers of the upper cover plate 31 and the bottom plate 32 at the rear of the fuel tank 30. The bottom wall of the bottomed cylindrical portion 61 of the elastic boot member 60 covered by these is in the fuel reservoir recess 33, and the fuel inlet 43 at the lower end of the fuel tank 30 is also provided. It can be provided at the lowest position in the fuel tank 30.

  Since the fuel outlet pipe 47 protrudes outside from the lid member 50 that is closed and fixed to the bottom plate 32 of the fuel tank 30, the fuel outlet pipe 47 is connected to the connection end 47c of the fuel outlet pipe 47 and the intake pipe 21. The other end of the fuel pipe 75 having one end connected to the provided fuel injection valve 22 is connected so that fuel is supplied to the fuel injection valve 22 (see FIG. 2).

  The fuel supply device F is configured as described above, and the fuel in the fuel tank 30 passes through the bottomed cylindrical portion 61 of the elastic boot member 60 via the communication hole 61h in the lower portion of the fuel tank 30. When the fuel tank 30 is in communication and there is fuel in the fuel tank 30, there is always fuel in the bottomed tubular portion 61.

When the fuel pump 40 is driven, the fuel stored in the fuel tank 30 is sucked into the bag of the filter 45 in which the fuel in the bottomed tubular part 61 is accommodated in the bottomed tubular part 61.
As a result, the stored fuel flows from the outside to the inside of the bag-like filter 45, and foreign matters are removed.
The fuel that has passed through the filter 45 reaches the suction port portion 41 through the suction connection pipe 42 from the fuel suction port 43 and is sucked into the fuel pump 40.

The fuel sucked into the fuel pump 40 is boosted by the fuel pump 40, discharged from the discharge port section 46 to the pressure regulator 48, and the pressure of the fuel boosted by the fuel pump 40 by the pressure regulator 48 is used to operate the internal combustion engine E. The pressure is adjusted to an appropriate pressure according to the condition.
The pressure-adjusted fuel is sent to the fuel outlet pipe 47, flows through the lid member 50, exits the fuel tank 30, is guided to the fuel pipe 75, and is supplied to the fuel injection valve 22.

When the pressure is increased by the pressure regulator 48 and the fuel exceeds an appropriate pressure, surplus fuel is discharged from the fuel discharge port 48a.
As described above, surplus fuel is discharged from the fuel discharge port 48a to the upper portion of the fuel recovery passage portion 62 of the elastic boot member 60, guided to the inclined fuel recovery passage portion 62, and flows to the right side to flow to the right side. Since the filter 45 inside 61 is collected on the right side where it is accommodated, it is easy to be sucked again.

  In the fuel supply device F, a stay 55 projecting from the inner surface of the lid member 50 into the fuel tank 30 extends downward toward the lower part of the fuel tank 30, and the fuel pump 30 has a lower end of the fuel inlet 43. Since the filter 45 is arranged along the longitudinal direction of the distal end side of the stay 55, the stay 55 protruding from the lid member 50 is attached to the stay 55. By extending downward toward the lower part in the fuel tank 30 in accordance with the shape, the fuel intake port 43 of the fuel pump 40 is positioned in the lower part in the fuel tank, so that the amount of stored fuel is always small. The fuel can be stably supplied to the internal combustion engine E, and the fuel pump 30 is not attached to the lid member 50 integrally. The lid member 50 can be attached to the optimal position according to the In the fuel supply apparatus F, an opening 34 is provided adjacent to the steeply inclined portion 32cs of the central bottom wall portion 32c close to the fuel injection valve 22, and a lid member 50 is attached.

  The stay 55 is an elongated plate member elongated in the extending direction, the fuel pump 40 is disposed along one left plate plane of the stay 55, and the filter 45 is disposed on the other right plate surface. Therefore, the fuel pump 40 and the filter 45 can be gathered in the vicinity of the stay 55 in a compact manner, and the opening to be inserted into the fuel tank 30 can be reduced, and the degree of freedom of the mounting position of the lid member 50 can be further increased. .

  The lid member 50 closes the opening 34 formed in the bottom plate 32 of the fuel tank 30, and the stay 55 protruding from the inner surface of the lid member 50 has a shape bent in a square shape on the plate plane, Since the tip side bent with its plate plane vertical is arranged to extend obliquely downward, and the fuel pump 40 is supported along the tip side, the fuel pump 40 should be placed at a low position in the fuel tank. Even if the fuel pump 40 is supported on the tip side that extends obliquely below the stay, the stay 55 is in a posture in which the plate plane is maintained vertically, so that the strength of the stay 55 can be ensured.

  Note that the stay 55 of the present embodiment is bent in the same direction on both side edges of the long flat plate portion 55a with the plate plane kept vertical, so that the side plate portions 55s and 55s are formed, so that the strength and rigidity are sufficient. Secured.

  A bottomed cylindrical part 61 having a communication hole 61h at the lower part of the elastic boot member 60 accommodates the lower part of the fuel pump 40 and the filter 45 supported along the distal end side extending obliquely downward of the stay 55, and the stay 55 Therefore, the fuel pump and the lower part of the filter supported on the tip of the stay are immersed in the fuel accumulated in the bottomed cylindrical part 61. The fuel level in the bottomed tubular part 61 is small in the vertical direction even if the fuel 30 sways and the internal fuel level may greatly oscillate, and the fuel intake port at the bottom of the fuel pump 40 is small. The possibility that 43 is exposed to the outside of the fuel is extremely low, and a stable fuel supply can always be made.

  Further, the fuel pump 40 and the lower part of the filter 45 supported on the distal end side of the stay 55 are inserted through the opening 34 formed in the bottom plate 32 of the fuel tank 30 with the bottomed cylindrical portion 61 of the elastic boot member accommodated. Therefore, the elastic boot member 60 prevents the fuel pump 40 and the filter 45 from directly hitting the inner wall surface of the fuel tank 30 through the introduction of the elastic boot member 60. The fuel pump 40, the filter 45, and the inner wall of the fuel tank can be protected.

  The fuel reservoir recess 33 is formed lower than the left and right bottom wall portions 32a and 32a and set at the lowest position in the fuel tank 30 so that the fuel in the fuel tank 30 is always collected around the filter 45. Thus, fuel can be efficiently sucked.

Next, an example in which two filters 81 and 82 are disposed around the fuel pump 40 is shown in FIG.
The structure in which the stay 55 supports the fuel pump 40 is the same as in the previous embodiment (the same reference numerals are used), and the filter 81 arranged on the right side along the stay 55 is arranged in the same manner as the filter 45. The second filter 82 is arranged symmetrically with the filter 81 on the left side along the fuel pump 40.

Suction connection pipes 81p, 82p extend from the lower part of both filters 81, 82 to the suction port 41 projecting from the lower end surface of the fuel pump 40.
The lower ends of both filters 81 and 82 are in a fuel reservoir recess 33 which is the lower part in the fuel tank 30.
Since the two long filters 81 and 82 are disposed around the fuel pump 40 along the fuel pump 40, a large filtration area can be secured with a simple and compact configuration.
In FIG. 7, the elastic boot member is omitted.

FIG. 8 shows an example in which three filters 91, 92, 93 are arranged around the fuel pump 40.
In this example, the positions of the filters 91 and 92 corresponding to the filters 81 and 82 in the example shown in FIG. 7 are displaced, the filter 91 is somewhat close to the bottom plate 32 of the fuel tank 30, and the filter 92 is the bottom plate. Some distance from 32.

A third filter 93 is arranged in parallel along the right filter 91.
However, the filter 93 is separated from the bottom plate 32 while the filter 91 is close to the bottom plate 32, so that the filter 91 and the filter 93 are displaced from each other vertically.
At least the lower ends of the filters 91 and 92 are in the fuel reservoir recess 33 which is the lower part in the fuel tank 30.

  The suction port portion 95 protruding from the lower end surface of the fuel pump 40 is relatively long. The suction connection pipes 91p and 92p extend from the filters 91 and 92 to the proximal end side of the suction port portion 95, and the distal end side of the suction port portion 95. Further, a suction connecting pipe 93p extends from a filter 93 which is shifted to the side away from the bottom plate 32.

Since the third filter 93 is only disposed along the filter 91, the third filter 93 is not large and bulky, and a filtration area can be increased more and more with a simple and compact configuration.
Also in FIG. 8, the elastic boot member is omitted.

1 is an overall side view of a motorcycle equipped with a fuel tank incorporating a fuel supply device according to an embodiment of the present invention. It is a side view of the fuel tank vicinity. It is the perspective view which showed the fuel supply apparatus in a fuel tank seeing through an upper cover board. It is a perspective view which shows the state which removed the elastic boot member from the fuel supply apparatus. It is a perspective view which shows the state which attached the elastic boot member to the fuel supply apparatus. It is sectional drawing of a fuel supply apparatus. It is a perspective view which shows the principal part of the fuel supply apparatus provided with two filters. It is a perspective view which shows the principal part of the fuel supply apparatus provided with three filters.

Explanation of symbols

P ... Power unit, E ... Internal combustion engine, 1 ... Motorcycle, 2 ... Head pipe, 3 ... Main frame, 20 ... Cylinder head, 21 ... Intake pipe, 22 ... Fuel injection valve, 23 ... Throttle body, 25 ... Air cleaner,
30 ... Fuel tank, 31 ... Upper lid plate, 32 ... Bottom plate, 32a ... Bottom wall portion, 32c ... Center bottom wall portion, 33 ... Fuel reservoir recess, 34 ... Opening, 35 ... Ring mounting seat,
F ... Fuel supply device, 40 ... Fuel pump, 41 ... Suction port section, 42 ... Suction connection pipe, 43 ... Fuel suction port, 45 ... Filter, 46 ... Discharge port section, 47 ... Fuel outlet pipe, 48 ... Pressure regulator, 48a ... Fuel outlet,
50 ... Lid member, 55 ... Stay, 55a ... Long plate part, 55s ... Side plate part, 55b ... Base end mounting wall, 55c ... Mounting piece, 56 ... Support base, 57 ... Screw, 58, 59 ... Support plate,
60 ... elastic boot member, 61 ... bottomed cylindrical part, 61h ... communication hole, 62 ... fuel recovery passage part,
70 ... sealing member, 71 ... bolt, 72 ... nut, 75 ... fuel pipe.
81, 82 ... filter, 81p, 82p ... suction connection pipe,
91, 92, 93 ... filter, 91p, 92p, 93p ... suction connection pipe, 95 ... suction port portion.

Claims (6)

The fuel pump is supported in the fuel tank by a lid member that closes the opening of the fuel tank and is liquid-tightly fastened.
A filter is provided at the inlet of the fuel pump;
In the fuel supply device for supplying the fuel discharged from the discharge port of the fuel pump to the internal combustion engine through the lid member,
A stay projecting into the fuel tank from the inner surface of the lid member extends downward toward the lower part of the fuel tank,
The fuel pump is supported on the tip side of the stay with the suction port positioned at the lower end,
The fuel supply apparatus according to claim 1, wherein the filter is disposed along a longitudinal direction of a tip side of the stay. The stay is an elongated plate member elongated in the extending direction,
2. The fuel supply apparatus according to claim 1, wherein the fuel pump is disposed along one plate plane of the stay, and the filter is disposed on the other plate plane. The lid member closes the opening formed in the bottom plate of the fuel tank,
The stay protruding from the inner surface of the lid member has a shape that is bent into a square shape on a plate plane,
The stay is disposed so that the tip side bent with the plate plane vertical is extended obliquely downward,
3. The fuel supply apparatus according to claim 2, wherein the fuel pump is supported along the longitudinal direction on the tip side of the stay.   An elastic boot member having a bottomed cylindrical shape and having a communication hole in the lower portion accommodates the fuel pump and the lower portion of the filter supported along the distal end side extending obliquely downward of the stay and is supported by the stay. The fuel supply device according to claim 3. The filter is disposed at a position lower than the lid member;
The fuel according to any one of claims 1 to 4, wherein a suction connection pipe for supplying fuel from the filter to the fuel pump is inclined downward from upstream to downstream. Feeding device.   6. The fuel supply device according to claim 1, wherein a plurality of the filters are disposed around the fuel pump.

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