JP2010038131A - Fuel supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce abnormal noise due to the vibration of a pressure regulator by preventing the vibration of the pressure regulator of a fuel supply device. <P>SOLUTION: The fuel supply device 1 is mounted on a fuel tank 2 for supplying fuel to an engine via a fuel pipe 3. The device includes a motor driven fuel pump 10 for pumping the fuel from the fuel tank and delivering it to the fuel pipe 3, the pressure regulator 20 for opening a valve to recirculate the fuel into the fuel tank when fuel pressure is a predetermined value or higher, and a case member 4 fixed to the fuel tank 2 and having a regulator mounting hole 25 for storing the pressure regulator 20. In the regulator mounting hole 25, a regulator holding spring 27 is mounted which has a holding piece 32 for elastically abutting on the pressure regulator 20. The pressure regulator 20 is held and fixed into the regulator mounting hole 25 by the regulator holding spring 27. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel supply device mounted on a vehicle such as a motorcycle, and more particularly, to a noise reduction technique for a pressure regulator used for fuel pressure adjustment of the fuel supply device.

  In fuel supply systems for vehicles mounted on motorcycles and four-wheeled passenger cars, diaphragm type, valve type, etc. to maintain the fuel pressure (fuel pressure) supplied to the engine at a suitable value and prevent fuel pulsation Various pressure regulators are used. Such a pressure regulator is attached to the fuel supply device as a pressure regulator unit in which a ball valve, a valve spring and the like are integrated. FIG. 8 is an explanatory view showing a pressure regulator attached state in a conventional fuel supply apparatus.

As shown in FIG. 8, in the conventional fuel supply apparatus, the pressure regulator 101 is attached in the case member 102 of the fuel supply apparatus in a united state. The pressure regulator 101 is usually disposed on the discharge side of the fuel supply device, and is attached to a regulator mounting hole 104 formed in a synthetic resin case member 102 via an O-ring 103. The fuel discharged from the fuel pump is appropriately adjusted in fuel pressure by the pressure regulator 101, and is sent to the engine via the fuel pipe. At that time, the excess fuel accompanying the pressure adjustment is returned to the fuel tank via the pressure regulator 101.
Japanese Patent Laid-Open No. 11-44279 JP 2005-113891 A JP 2007-239585 JP

  However, in the fuel supply apparatus as shown in FIG. 8, since the pressure regulator 101 is held by the O-ring 103, when fuel is returned from the pressure regulator 101 during the pump operation, the pressure regulator 101 is accompanied by the operation of the regulator. May vibrate and generate abnormal noise, and this has been a challenge. In particular, when the O-ring 103 is immersed in fuel and the reaction force decreases, the pressure regulator 101 is likely to vibrate, and the vibration when the pressure regulator 101 abuts against the case member 102 is transmitted to the entire device and is heard as abnormal noise. There is.

  In this case, if the pressure regulator 101 is press-fitted into the case member 102, the vibration is suppressed and the generation of abnormal noise is also suppressed. However, if the unit fixing force of the case member 102 decreases due to the creep of the synthetic resin, the generation of vibration is unavoidable. Further, in the case of unit press-fitting, generally, full-fitting press-fitting or three-point press-fitting is performed. However, in the case of full-fitting press-fitting, variation in the press-fitting load is large due to variations in the press-fitting allowance and it is difficult to manage the dimensions of the press-fitting allowance. On the other hand, in the case of the three-point press-fitting, although the press-fitting load is relatively stable with respect to the press-fitting allowance, the holding force is easily reduced correspondingly, and the generation of noise due to vibration cannot be effectively prevented.

  An object of the present invention is to prevent vibration of the pressure regulator of the fuel supply device without being affected by creep of the synthetic resin member, and to reduce noise caused by vibration of the pressure regulator.

  The fuel supply apparatus of the present invention is a fuel supply apparatus that is attached to a fuel tank and supplies fuel from the fuel tank to an engine via a fuel pipe, and sucks the fuel in the fuel tank, and the fuel pipe And a pressure that opens when the pressure of the fuel supplied to the fuel pipe side by the fuel pump exceeds a predetermined value and returns the fuel into the fuel tank A regulator, a case member made of synthetic resin fixed to the fuel tank and formed with a regulator mounting portion for housing the pressure regulator; and the pressure regulator mounted on the case member and housed in the regulator mounting portion. A regulator that elastically contacts and holds and fixes the pressure regulator in the regulator mounting portion. And having a motor fixing member.

  In the present invention, the fuel supply device is provided with a regulator fixing member that elastically contacts the pressure regulator housed in the regulator mounting portion and holds and fixes the pressure regulator in the regulator mounting portion. The attached pressure regulator is less likely to vibrate as the pump operates. For this reason, generation | occurrence | production of the abnormal noise by the vibration of a pressure regulator is suppressed, and improvement of product quality is aimed at.

  In the fuel supply apparatus, as the regulator fixing member, an annular side wall portion interposed between a peripheral wall of the regulator mounting portion recessed in the case member and the pressure regulator, and the side wall It is also possible to use one having a holding piece extending radially inward from the portion and elastically contacting the outer periphery of the pressure regulator. In addition, the regulator fixing member is formed in a flat plate shape, and is mounted in a fixing member accommodating portion formed in the vicinity of the regulator attaching portion of the case member, and the pressure regulator accommodated in the regulator attaching portion. You may use what elastically contacts an outer peripheral part. Further, a first O-ring that is interposed between the pressure regulator and the peripheral wall of the regulator mounting portion that is recessed in the case member is provided, and as the regulator fixing member, the peripheral wall and the pressure regulator A second O-ring interposed between the pressure regulator and disposed at a position higher than the oil level of the fuel tank may be provided. In this case, since the second O-ring does not always contact the fuel, the reaction force reduction due to the immersion of the fuel is not promoted, and the performance as the fixing member is maintained for a long time.

  According to the fuel supply device of the present invention, in the fuel supply device including the fuel pump and the pressure regulator, the case member formed with the regulator mounting portion for accommodating the pressure regulator is elastically applied to the pressure regulator in the regulator mounting portion. Since the abutting regulator fixing member is attached, it is possible to suppress the pressure regulator from vibrating with the pump operation, and it is possible to reduce noise caused by the vibration of the pressure regulator.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a configuration of a fuel supply apparatus that is Embodiment 1 of the present invention. A fuel supply device 1 in FIG. 1 is a device for a motorcycle, and is attached to an upper surface 2a of a fuel tank 2 in a form inserted from above the tank. The fuel supply device 1 is connected to a fuel supply system of an engine (not shown), and supplies fuel to a fuel injection valve of the engine via a fuel pipe 3.

  As shown in FIG. 1, the fuel supply device 1 has a configuration in which a fuel pump 10 and a pressure regulator 20 are accommodated in a case member 4 made of synthetic resin, and forms one fuel pump module. The case member 4 includes a cylindrical case portion 4a and a flange portion 4b. A fuel pump 10 is attached in the case portion 4a, and a pressure regulator 20 is attached to the back of the case portion 4a. The flange portion 4b extends in the radial direction from the upper outer periphery of the case portion 4a and is attached to the fuel tank upper surface 2a. The fuel pump 10 uses an electric motor as a drive source and includes a motor part M and a pump part P.

  A synthetic resin cover 5 is attached to the lower end side of the case portion 4a. The fuel supply device 1 is inserted into the tank through a pump attachment hole 2b formed in the upper surface 2a of the fuel tank with the cover 5 attached. At that time, the flange portion 4b is fixed to the upper portion of the fuel tank by bolts and nuts (not shown). An outlet pipe 6 and a power connector 7 are provided at the upper end of the case member 4. The fuel pipe 3 is connected to the outlet pipe 6, and a power supply wiring (not shown) is connected to the power connector 7. The power connector 7 accommodates a power terminal 8 and is electrically connected to the motor unit M.

  The fuel pump 10 is accommodated in a steel shell case 11. End covers 12 and 13 are fixed by crimping to both ends of the cylindrical shell case 11. The end cover 12 is formed of a synthetic resin and is attached to one end side (the upper end side in FIG. 1) of the shell case 11. The end cover 13 is formed by aluminum die casting and is attached to the other end side of the shell case 11. The end cover 12 is provided with a brush holder portion 15 that holds the brush 14 of the motor portion M, and serves as a cover for the shell case 11 and a brush holder.

  A fuel discharge portion 16 is formed in the end cover 12 so as to protrude in the axial direction. The fuel discharge part 16 is fitted and connected to an end cover attaching part 17 that is recessed in the case part 4 a back part of the case member 4. The end cover mounting portion 17 communicates with a fuel flow path 18 b formed in the outlet pipe 6 via a fuel flow path 18 a formed in the case member 4. The fuel discharge portion 16 is attached to the end cover attachment portion 17 through an O-ring 19 in an airtight state.

  A check valve (check valve) 21 is accommodated in the fuel discharge portion 16. The check valve 21 includes a ball valve 22, a return spring 23, and a spring holder 24, and prevents fuel from flowing backward from the fuel pipe 3 side to the fuel pump 10 side. One end side (outflow side) of the check valve 21 communicates with the fuel flow path 18 a side, and the other end side (inflow side) opens directly into the shell case 11. When the fuel pump 10 is operated, fuel is sent from the shell case 11 toward the fuel discharge portion 16. As a result, the check valve 21 is opened, and the fuel is sent from the fuel discharge section 16 to the fuel flow paths 18a and 18b. On the other hand, when the fuel pump 10 is stopped, the check valve 21 is closed by the urging force of the return spring 23, and fuel inflow from the fuel flow path 18 into the shell case 11 is blocked.

  The case member 4 further accommodates a pressure regulator 20 used for adjusting fuel pressure and preventing fuel pulsation. The pressure regulator 20 is a pressure regulator unit incorporating a ball valve, a valve spring, and the like. A regulator mounting hole (regulator mounting portion) 25 is recessed in the case member 4, and the pressure regulator 20 is mounted in the regulator mounting hole 25 in the form of this unit. In the fuel supply apparatus 1, a regulator holding spring 27 (regulator fixing member, hereinafter abbreviated as a spring 27) is interposed between the pressure regulator 20 and the regulator mounting hole 25 in addition to the O-ring 26. . The pressure regulator 20 is held and fixed in the regulator mounting hole 25 by the elastic force of the spring 27.

  One end side of the pressure regulator 20 is connected to a fuel flow path 18c opened to the fuel flow path 18a. On the other hand, the other end faces an oil chamber 28 formed between the end cover 12 and the case portion 4a. When the fuel pump 10 is attached to the case member 4, the oil chamber 28 is a gap formed between the two, and communicates with the inside of the fuel tank 2 through a communication hole (not shown) formed in the case portion 4 a.

  The pressure regulator 20 operates and opens when the fuel pressure in the fuel pipe 3 becomes higher than a predetermined value. When the pressure regulator 20 operates, the fuel flow path 18a and the oil chamber 28 communicate with each other, and the fuel discharged from the fuel pump 10 is appropriately returned into the fuel tank 2. Thereby, the fuel pressure of the fuel delivered from the fuel supply device 1 is adjusted, and the pulsation of the supplied fuel is suppressed. However, in the conventional fuel supply apparatus, as described above, when the pressure regulator is opened during the operation of the fuel pump and the fuel is returned into the tank, there is a problem that noise is generated due to vibration of the pressure regulator.

  On the other hand, in the fuel supply apparatus 1, since the pressure regulator 20 is held in the regulator mounting hole 25 by the spring 27, the vibration (resonance) of the pressure regulator 20 is suppressed, and compared with the conventional fuel supply apparatus. The noise is reduced. FIG. 2 is an explanatory view showing an attachment state of the pressure regulator 20 in the fuel supply device 1, and FIG. 3 is a perspective view showing a configuration of the spring 27.

  The spring 27 is made of metal such as stainless steel, and is formed in a substantially cylindrical shape as shown in FIGS. The spring 27 has a form in which a strip-shaped blank is formed into a C-shaped annular shape, and a cut 31 is formed at the end of the side wall 29. The spring 27 is provided with four holding pieces 32 extending inward in the radial direction. The holding piece 32 is formed in the shape of a cantilever leaf spring, and can be elastically displaced along the radial direction.

  Such a spring 27 is mounted between the peripheral wall 25a of the regulator mounting hole 25 and the pressure regulator 20, as shown in FIG. In the fuel supply device 1, the regulator mounting hole 25 is a circular hole, and the cylindrical pressure regulator 20 is accommodated therein. The outer diameter of the pressure regulator 20 is smaller than the inner diameter of the regulator mounting hole 25, and a gap G is formed between the pressure regulator 20 and the peripheral wall 25 a of the regulator mounting hole 25. The spring 27 is attached to the gap G so as to be inserted from the axial direction.

  In this case, the outer diameter of the spring 27 is slightly larger than the inner diameter of the regulator mounting hole 25, and the spring 27 is mounted in the gap G so as to reduce the outer diameter. As described above, the spring 27 is provided with the cut 31, and the entire spring can be bent while being elastically reduced in diameter so that the end portions of the side wall 29 facing the cut 31 are brought close to each other. For this reason, when the spring 27 is reduced in diameter and inserted into the gap G, and then the spring 27 is released to a free state, the spring 27 is elastically attached to the peripheral wall 25a of the regulator mounting hole 25 by its urging force. Is done.

  In addition, the holding piece 32 of the spring 27 is formed such that the inner diameter (diameter of the inscribed circle) connecting the tip ends thereof is slightly smaller than the outer diameter of the pressure regulator 20. For this reason, when attaching the spring 27 in the gap G, the holding piece 32 comes into contact with the outer peripheral portion 20a of the pressure regulator 20 and is pressed in the radial direction by the outer peripheral portion 20a. When the spring 27 is mounted in the gap G, the pressure regulator 20 receives the elastic repulsive force of the holding piece 32 and is held inside the spring 27 by this pressing force. In other words, the pressure regulator 20 is held in the regulator mounting hole 25 by the elastic force of the spring 27 interposed between the peripheral wall 25a.

  Thus, in the fuel supply device 1 according to the present invention, the spring 27 is disposed between the regulator mounting hole 25 and the pressure regulator 20, and the pressure regulator 20 is held and fixed in the regulator mounting hole 25 by the spring 27. . For this reason, it becomes difficult for the pressure regulator 20 to resonate with respect to vibrations from the outside, and vibrations associated with the pump operation are suppressed. Therefore, compared with the conventional O-ring holding, the generation of sound due to the vibration of the pressure regulator 20 is suppressed, and it is possible to reduce the abnormal noise.

  Further, since the pressure regulator 20 is held by the metal spring 27, there is no deterioration such as swelling due to fuel unlike the synthetic resin, and a predetermined holding force can be maintained for a long period of time. Further, since the pressure regulator 20 is not press-fitted into the synthetic resin member, dimensional management associated with the press-fitting is facilitated, and a reduction in fixing force due to creep can be suppressed. In addition, since the portion where the spring 27 comes into contact with the resin member has a structure in which the two come into contact with each other in a plane, it is easy to mount the spring 27.

  On the other hand, the motor part M is a DC motor with a brush. The shell case 11 also serves as a yoke of the motor part M, and a plurality of permanent magnets 35 are fixed to the inner peripheral surface thereof. An armature 36 is rotatably disposed inside the permanent magnet 35. The armature 36 includes a core 38 having a plurality of slots 37 extending in the axial direction, and a winding 39 wound around the slot 37. The armature 36 is fixed to a rotating shaft 40 that is rotatably supported. A commutator 41 is provided on the upper side of the armature 36 in FIG. The commutator 41 is also fixed to the rotating shaft 40. The brush 14 is in contact with the commutator 41 from the axial direction. As described above, this brush is accommodated in the brush holder portion 15 formed on the end cover 12 and is electrically connected to the power supply terminal 8.

  The pump part P is a non-volumetric regenerative pump and is arranged on the end cover 13 side. The pump part P is driven by the motor part M and is formed of a pump case 42 and an impeller 43. A cylindrical impeller accommodating portion 44 is sunk on the lower end side of the pump case 42. An impeller 43 connected to the rotating shaft 40 is disposed in the impeller accommodating portion 44. A D-cut portion 40 a is formed on the rotary shaft 40, and the impeller 43 is attached to the D-cut portion 40 a and rotates integrally with the rotary shaft 40. Near the outer periphery of the impeller 43, a large number of pump chambers 45 penetrating in the axial direction are provided along the circumferential direction.

  A fuel flow path 46 is formed in the end cover 13 in the axial direction so as to correspond to the pump chamber 45. The fuel flow path 46 communicates with the fuel suction port 47, and a filter (not shown) is attached to the fuel suction port 47. On the other hand, on the upper end side of the impeller accommodating portion 44, a communication hole 48 that opens into the shell case 11 is provided corresponding to the pump chamber 45, and this communication hole 48 is provided as the impeller 43 rotates. The fuel is sent into the shell case 11.

  The fuel supply apparatus 1 having such a configuration functions as follows. First, when the motor unit M is driven and the fuel pump 10 is operated, the impeller 43 rotates, the fuel in the fuel tank 2 is sucked through the filter, and flows into the shell case 11. The shell case 11 is filled with fuel, the check valve 21 is opened with the operation of the fuel pump 10, and the fuel is sent to the fuel flow paths 18a and 18b. On the other hand, when the fuel pressure exceeds a predetermined adjustment pressure, the pressure regulator 20 is opened, and the fuel in the shell case 11 is returned to the fuel tank 2. Thereby, the pressure of the fuel supplied to the fuel pipe 3 side is appropriately adjusted, and the pulsation of the fuel is also absorbed. The fuel pipe 3 is connected to the fuel injection valve of the engine as described above, and the fuel sucked from the fuel tank 2 by the fuel supply device 1 is supplied to the fuel injection valve via the fuel pipe 3.

  Next, a fuel supply apparatus 50 that is Embodiment 2 of the present invention will be described. FIG. 4 is a cross-sectional view showing a configuration in the vicinity of the pressure regulator in the fuel supply device 50, and FIG. 5 is an explanatory diagram showing an attachment state of the pressure regulator in the fuel supply device 50. In the following embodiments, the same members and portions as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 4 and 5, in the fuel supply device 50, the pressure regulator 20 is held and fixed in the regulator mounting hole 25 by a regulator holding spring 51 (regulator fixing member, hereinafter abbreviated as spring 51). . A spring accommodating portion (fixing member accommodating portion) 52 is provided in the vicinity of the regulator mounting hole 25, and a leaf spring-like spring 51 formed of a metal such as stainless steel is accommodated in the spring accommodating portion 52. ing. FIG. 6 is a plan view showing configurations of the regulator mounting hole 25 and the spring accommodating portion 52.

  As shown in FIG. 6, the spring accommodating portion 52 is provided in contact with a part of the regulator mounting hole 25, and is slightly inclined in the both sides of the spring accommodating portion 52 (for example, about 10 °) radially outward. It extends to. As with the regulator mounting hole 25, the spring accommodating portion 52 is opened on the lower surface side of the case member 4, and a slit portion 53 is formed in the inner portion thereof. The slit portion 53 is formed to be narrower than the opening 52 a of the spring accommodating portion 52, and both end portions of the spring 51 can be inserted. The spring 51 is mounted in the spring accommodating portion 52 in such a manner that both ends are held by the slit portion 53.

  In such a fuel supply device 50, the pressure regulator 20 is attached in a state where the flat spring 51 is disposed in the spring accommodating portion 52. At that time, the pressure regulator 20 is attached to the regulator attachment hole 25 with a light press fit while the spring 51 is bent in a “U” shape as shown in FIG. 5. As a result, the pressure regulator 20 is held in the regulator mounting hole 25 by the elastic force of the spring 51. Therefore, also in the fuel supply device 50 of the second embodiment, the pressure regulator 20 is less likely to resonate with vibrations from the outside, vibrations associated with the pump operation are suppressed, and abnormal noise compared to conventional O-ring holding. Can be suppressed.

  Further, since the pressure regulator 20 is held by a metal spring 51, there is no deterioration such as swelling due to fuel unlike a synthetic resin, and a predetermined holding force can be maintained for a long period of time. Furthermore, although the pressure regulator 20 is lightly press-fitted into the regulator mounting hole 25, the pressure-fitting allowance can be reduced due to the configuration in which the pressure regulator 20 is held in the regulator mounting hole 25 by the elastic repulsive force of the spring 51. Dimension management and creep are also suppressed. In addition, also in this case, the portion where the spring 51 contacts the resin member has a structure in which both are in contact with each other in a plane, so that the spring 51 can be easily mounted.

  It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

  For example, in the above-described embodiment, an example in which the fuel supply device according to the present invention is used for a motorcycle has been shown. However, the application is not limited to this, and the fuel supply device for various vehicles such as a four-wheeled vehicle. It can also be used. The configuration of the present invention can be applied not only to a fuel pump but also to a pump such as a liquid such as water or chemicals or a gas such as air. Furthermore, a diaphragm type pressure regulator can be used as the pressure regulator 20 as in FIG. In addition, in the above-described embodiment, an example in which a two-pole motor is used for the motor unit M has been shown. In addition, the present invention is applicable.

  In the above-described embodiment, the configuration in which the pressure regulator 20 is held by a metal elastic member is shown. However, as shown in FIG. 7, a configuration in which the pressure regulator is held by two O-rings is also possible. . That is, as shown in FIG. 7, the pressure regulator 61 may be held by the first O ring 62 and the second O ring (regulator fixing member) 63. In this case, the second O-ring 63 is disposed above the oil level L (see FIG. 1) when the fuel tank 2 is full, and more preferably is disposed above the lower surface 2c of the fuel tank 2. By adopting such a configuration, the pressure regulator 61 is housed and held in the case member 64 without play, and the pressure regulator 61 is less likely to vibrate. For this reason, the vibration when the pressure regulator 61 contacts the case member 64 is suppressed, and the generation of abnormal noise is also suppressed. Further, since the second O-ring 63 is not always in contact with the fuel, the reaction force decrease due to the immersion of the fuel is not promoted, and the performance as the fixing member is maintained for a long time.

It is sectional drawing which shows the structure of the fuel supply apparatus which is Example 1 of this invention. It is explanatory drawing which shows the attachment state of the pressure regulator in the fuel supply apparatus of FIG. It is a perspective view which shows the structure of a regulator holding spring. It is sectional drawing which shows the structure of the pressure regulator vicinity in the fuel supply apparatus which is Example 2 of this invention. It is explanatory drawing which shows the attachment state of the pressure regulator in the fuel supply apparatus of FIG. It is a top view which shows the structure of a regulator attachment hole and a spring accommodating part. It is explanatory drawing which shows the modification of this invention. It is explanatory drawing which shows the pressure regulator attachment state in the conventional fuel supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel supply apparatus 2 Fuel tank 2a Upper surface 2b Pump attachment hole 3 Fuel piping 4 Case member 4a Case part 4b Flange part 5 Cover 6 Outlet pipe 7 Power supply connector 8 Power supply terminal 10 Fuel pump 11 Shell case 12 End cover 13 End cover 14 Brush 15 Brush holder part 16 Fuel discharge part 17 End cover attaching part 18 Fuel flow path 18a Fuel flow path 18b Fuel flow path 18c Fuel flow path 19 O-ring 20 Pressure regulator 20a Outer peripheral part 21 Check valve 22 Ball valve 23 Return spring 24 Spring holder 25 Regulator mounting hole (Regulator mounting part)
25a peripheral wall 26 O-ring 27 regulator holding spring (regulator fixing member)
28 Oil chamber 29 Side wall portion 31 Cut 32 Holding piece 35 Permanent magnet 36 Armature 37 Slot 38 Core 39 Winding 40 Rotating shaft 40a D cut portion 41 Commutator 42 Pump case 43 Impeller 44 Impeller accommodating portion 45 Pump chamber 46 Fuel flow path 47 Fuel Suction port 48 Communication hole 50 Fuel supply device 51 Regulator holding spring (regulator fixing member)
52 Spring accommodating portion (fixing member accommodating portion)
52a Opening 53 Slit 61 Pressure Regulator 62 First O Ring 63 Second O Ring (Regulator Fixing Member)
64 Case member M Motor part P Pump part G Gap
101 pressure regulator
102 Case material
103 O-ring
104 Regulator mounting hole

Claims (4)

A fuel supply device attached to a fuel tank and supplying fuel from the fuel tank to an engine via a fuel pipe,
A fuel pump that sucks fuel in the fuel tank and delivers the fuel to the fuel pipe;
A pressure regulator that opens when the pressure of the fuel supplied to the fuel pipe side by the fuel pump exceeds a predetermined value, and returns the fuel into the fuel tank;
A synthetic resin case member fixed to the fuel tank and formed with a regulator mounting portion for accommodating the pressure regulator;
And a regulator fixing member attached to the case member, elastically contacting the pressure regulator housed in the regulator mounting portion, and holding and fixing the pressure regulator in the regulator mounting portion. Feeding device.   2. The fuel supply device according to claim 1, wherein the regulator fixing member is interposed between a peripheral wall of the regulator mounting portion recessed in the case member and the pressure regulator, and is formed in an annular shape. And a holding piece that extends radially inward from the side wall and elastically contacts the outer periphery of the pressure regulator.   2. The fuel supply device according to claim 1, wherein the regulator fixing member is formed in a flat plate shape, and is mounted in a fixing member housing portion formed in the vicinity of the regulator mounting portion of the case member. A fuel supply device that elastically abuts on an outer peripheral portion of the pressure regulator housed in the pressure regulator.   2. The fuel supply device according to claim 1, wherein a first O-ring that is interposed between a peripheral wall of the regulator mounting portion that is recessed in the case member and the pressure regulator and functions as a sealing material, and the regulator fixing member And a second O-ring interposed between the peripheral wall and the pressure regulator and disposed at a position higher than the oil level of the fuel tank.

Images