JP2007291863A - Fuel supply module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize pressure of fuel extracted from a fuel ejection pipe to a predetermined value by damping pulsation to the utmost even though the discharge pressure of an electric pump is pulsated. <P>SOLUTION: In the fuel supply module M provided with: a mounting base member 2 with the fuel ejection pipe 12 projecting on its outer side; the electric pump Ep supported by the mounting base member 2 and stored in a fuel tank T; and a regulator valve R provided to the mounting base member 2 to regulate the discharge pressure of the electric pump Ep, a pressure regulating passage 35 opened from a fuel passage 28 communicating the discharge side of the electric pump Ep with the fuel ejection pipe 12 to the inside of the fuel tank T is formed in the mounting base member 2, the regulator valve R is arranged in the pressure regulating passage 35, and a baglike recessed part 45 to damp pressure pulsation generated on the fuel passage 28 side is branched from and formed in the pressure regulating passage 35 positioned further upstream from the regulator valve R. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fuel supply module that mainly supplies fuel to a fuel injection valve of an engine, and in particular, a mounting base member that is attached to a fuel tank mounting wall and projects a fuel take-out pipe to the outside, and is supported by the mounting base member And an electric pump which pumps up the fuel in the fuel tank and sends it to the fuel take-out pipe, and a part of the fuel discharged from the electric pump is returned to the fuel tank to adjust its discharge pressure. Therefore, the present invention relates to an improvement of a fuel supply module including a regulator valve provided on the mounting base member.

Such a fuel supply module is already known as disclosed in Patent Document 1 below.
JP 2004-138004 A

  In such a conventional fuel supply module, the regulator valve may not operate properly even though there is no structural failure in the regulator valve. When pulsating, it was found that the valve body of the regulator valve vibrates due to the effect.

  The present invention has been made on the basis of such investigations. Even if the discharge pressure of the electric pump pulsates, the pulsation is attenuated as much as possible, and the pressure regulating function of the regulator valve is not hindered, and the fuel take-out pipe It is an object of the present invention to provide the fuel supply module capable of stabilizing the fuel pressure taken out from the fuel tank at a predetermined value.

  To achieve the above object, the present invention provides a mounting base member that is attached to a fuel tank mounting wall and projects a fuel take-out pipe to the outside, and is supported by the mounting base member and accommodated in the fuel tank. An electric pump that pumps up fuel in the tank and sends it to the fuel take-out pipe, and a regulator valve provided on the mounting base member to recirculate part of the fuel discharged from the electric pump into the fuel tank and adjust the discharge pressure In the fuel supply module comprising: a pressure regulating path branched from a fuel passage communicating between the discharge side of the electric pump and the fuel take-off pipe and opened in the fuel tank; The regulator valve is provided in the pressure regulating path, and is generated on the fuel passage side in the pressure regulating path upstream of the regulator valve. A first feature in that a pulsation damping means for damping that pressure pulsation.

  In addition to the first feature, the second feature of the present invention is that the pulsation damping means is configured by a bag-like recess branched from a pressure regulating path upstream from the regulator valve.

  Furthermore, in addition to the first feature, the present invention has a third feature that the pulsation damping means is configured by a fuel filter loaded in a pressure regulating path upstream of the regulator valve.

  Furthermore, in addition to the first feature, the present invention has a fourth feature in that the pulsation damping means is configured by a rectifying member provided in a pressure regulating path upstream of the regulator valve.

  Furthermore, in addition to the first feature, the present invention has a fifth feature in that the pulsation damping means is configured by an expansion chamber formed in the middle of a pressure regulating path upstream from the regulator valve.

  In addition to the fifth feature of the present invention, the valve housing of the regulator valve is configured separately from the mounting base member, and is fitted and fixed to the mounting base member. A sixth feature is that a recess serving as the expansion chamber is formed on at least one of the surfaces facing the valve housing.

  In addition to the first feature of the present invention, the pressure adjusting path includes a horizontal pressure adjusting path upstream portion connected to the fuel passage and a vertical pressure adjusting path downstream portion provided with a regulator valve. In addition, the pressure regulating passage upstream portion and the pressure regulating passage downstream portion are arranged eccentrically with each other so that a throttle-like communication portion is formed therebetween, and the damping means is configured by the throttle-like communication portion. The seventh feature is provided.

  According to the first feature of the present invention, if the discharge pressure pulsates during the discharge of fuel from the electric pump to the fuel passage, the pulsation is transmitted to the pressure regulating path side, but before reaching the regulator valve, It can be attenuated by pulsation damping means. As a result, it is possible to prevent the regulator valve from vibrating due to the pulsation of the discharge pressure of the electric pump, and to ensure an appropriate pressure regulating function of the regulator valve.

  According to the second feature of the present invention, the pulsation damping of the discharge pressure of the electric pump can be achieved by a very simple damping means of branching the bag-like recess from the front of the regulator valve. There is no increase and the cost of the fuel supply module is not increased.

  According to the third feature of the present invention, the pulsation damping of the discharge pressure of the electric pump can be achieved by a very simple damping means of loading a fuel filter in the pressure regulating path upstream of the regulator valve. , Almost no increase in the cost of the fuel supply module. In addition, since fuel directed to the regulator valve can be filtered by the fuel filter, it is possible to prevent clogging of the regulator valve.

  According to the fourth aspect of the present invention, the pulsation damping of the discharge pressure of the electric pump can be achieved by a very simple damping means in which a rectifying member is disposed at the inlet of the regulator valve. Almost no increase in cost.

  According to the fifth aspect of the present invention, the pulsation damping of the discharge pressure of the electric pump is achieved by an extremely simple damping means that forms an expansion chamber in the middle of the pressure regulating path upstream from the regulator valve. There is no increase in the number of points, and the cost of the fuel supply module is not increased.

  According to the sixth aspect of the present invention, the expansion chamber is constituted by a recess formed in at least one of the facing surface of the mounting base member and the valve housing, so that the expansion chamber is simultaneously formed with the mounting base member or the valve housing. The rise in manufacturing cost can be suppressed.

  According to the seventh aspect of the present invention, the pulsation attenuation of the discharge pressure of the electric pump is formed by forming a throttle-like communication portion between the upstream portion in the horizontal direction and the downstream portion in the vertical direction. As described above, since it can be achieved by extremely simple damping means that are arranged eccentrically with each other, the number of parts is not increased and the cost of the fuel supply module is not increased.

  Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

  1 is a perspective view of a fuel supply module according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing the fuel supply module attached to a fuel tank, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a longitudinal sectional view of an essential part of the fuel supply module according to the third embodiment of the present invention, FIG. 5 is a sectional view taken along line 5-5 of FIG. 4, and FIG. FIG. 7 is a sectional view taken along the line 7-7 of FIG. 2, showing a fifth embodiment of the present invention, in which a fuel supply module according to a fourth embodiment of the present invention is shown.

  First, the first embodiment of the present invention shown in FIGS. 1 and 2 will be described.

  A fuel supply module M of the present invention for supplying the fuel in the fuel tank T to the fuel injection valve I of the engine is attached to the ceiling wall 1 of the fuel tank T mounted on a vehicle such as a motorcycle.

  The fuel supply module M includes an attachment base member 2, an electric pump Ep disposed directly below the attachment base member 2 with the axial direction directed up and down, and an upper pump holder 3 </ b> A formed integrally with the attachment base member 2. A lower pump holder 3B for housing and holding the electric pump Ep in cooperation with the mounting base member 2 and a fuel strainer attached to the lower end of the electric pump Ep. 4 is provided.

  An opening 5 for inserting the electric pump Ep is provided in the ceiling wall 1 of the fuel tank T, and a mounting ring 6 surrounding the opening 5 is fixed. A plurality of mounting bolts 7, 7... Projecting from the upper surface of the mounting ring 6 are fixed.

  The mounting base member 2 is overlaid on the upper surface of the mounting ring 6 so as to close the opening 5, and includes a plurality of mounting bolts 7, 7... And a plurality of nuts 8, 8. It is fixed to the mounting ring 6. At that time, an annular seal member 9 for sealing the opening 5 is interposed between the mounting base member 2 and the ceiling wall 1 of the fuel tank T.

  The attachment base member 2 is made of synthetic resin, and a fuel take-out pipe 12 protruding in the horizontal direction outside the fuel tank T is integrally formed on the upper portion of the attachment base member 2. Is connected to a fuel supply conduit 33 connected to the fuel injection valve I of the engine.

  The upper pump holder 3A formed integrally with the lower surface of the mounting base member 2 has a cylindrical shape so as to protrude into the fuel tank T and fit into the outer peripheral surface of the upper half of the electric pump Ep. The holder 3 </ b> A is provided with a plurality of T-shaped locking grooves 13 </ b> F whose lower ends are opened at regular intervals in the circumferential direction.

  On the other hand, the lower pump holder 3B is formed into a cylindrical shape with a synthetic resin so as to accommodate and hold the lower half of the electric pump Ep. At that time, a plurality of T-shaped locking claws 13 </ b> M protruding from the upper end are integrally formed. The lower pump holder 3B is coupled to the upper pump holder 3A by engaging the locking claws 13M with the locking grooves 13F. Thus, the electric pump Ep is accommodated and held between the upper pump holder 3A and the lower pump holder 3B.

  The electric pump Ep includes an electric motor E with the rotor 20 directed in the vertical direction and a fuel pump P driven by the electric motor E. The electric motor E is coupled to a cylindrical stator 17 having a plurality of magnets 17a arranged in the circumferential direction on the inner circumferential surface, an upper bearing bracket 18 that is caulked to the upper end of the stator 17, and a lower end thereof. The lower bearing bracket 19 and the rotor 20 on which the rotor shaft 20a is supported by the upper and lower bearing brackets 18 and 19 are configured.

  The fuel pump P includes a pump case 23 that is caulked to the stator 17 together with the lower bearing bracket 19 so as to define a pump chamber 22 between the lower surface of the lower bearing bracket 19 and a rotor shaft that is rotatably accommodated in the pump chamber 22. The pump impeller 24 connected to the lower end of 20a is configured in a Wesco type.

  The pump case 23 is provided with a suction port 25 that opens into the pump chamber 22, and the fuel strainer 4 disposed at the bottom of the fuel tank T is connected to the suction port 25. It is attached to a support shaft 26 projecting from the lower surface of the case 23. The lower bearing bracket 19 is provided with a discharge port 27 that communicates between the pump chamber 22 and the stator 17.

  The upper bearing bracket 18 is integrally formed with a fuel discharge pipe 30 that protrudes upward and has a final discharge port 34 that communicates with the interior of the stator 17, and in which the fuel flows backward to the final discharge port 34. A check valve 31 is provided to prevent this. The fuel discharge pipe 30 is fitted into a fitting hole 29 opened on the lower surface of the mounting base member 2 via a seal member 32.

  The mounting base member 2 includes a series of L-shaped fuel passages 28 that run inside the fuel take-out pipe 12 and the fuel discharge pipe 30, and branches from the middle of the fuel passage 28 to open the downstream end into the fuel tank T. Pressure regulating path 35 is formed. The pressure adjusting path 35 is bent downward from a downstream end of the pressure adjusting path upstream portion 35a formed on the extension line of the fuel passage 28 on the fuel take-out pipe 12 side, and the downstream end is bent. And a pressure regulating path downstream portion 35b opened in the fuel tank T. In the pressure regulating path downstream portion 35b, the pressure in the fuel passage 28 is set to a predetermined pressure suitable for fuel injection from the fuel injection valve I. A regulator valve R for adjustment is provided.

  The regulator valve R includes a bottomed cylindrical valve housing 36 formed separately from the mounting base member 2, and a valve hole 37 penetrating through the end wall of the valve housing 36, and the valve A conical valve seat 38 connected to the inner end of the hole 37 is formed. In the valve chamber 42 in the valve housing 36, a ball-type valve body 39 that can be seated on the valve seat 38, and a pressure regulating spring that biases the valve body 39 in a seating direction with the valve seat 38 with a predetermined set load. 40 and an annular retainer 41 that supports the fixed end of the pressure adjusting spring 40 are accommodated. The retainer 41 is press-fitted and fixed to the inner peripheral surface of the valve chamber 42 and is engaged with the opening of the valve chamber 42. The retaining ring 46 is retained by the retaining ring 46.

  The valve housing 36 is fitted and fixed to a fitting hole 43 provided in the mounting base member 2 so as to open on the lower surface thereof, with the valve hole 37 facing upward, and the valve hole 37 is fixed to the ceiling of the fitting hole 43. It communicates with the pressure regulating path upstream portion 35a through a through hole 44 provided in the wall. Thus, the through hole 44, the valve hole 37, and the valve chamber 42 constitute the pressure regulating path downstream portion 35b.

  Further, the attachment base member 2 is formed with a bag-like recess 45 that branches off from the pressure regulating path 35 upstream from the regulator valve R. In the illustrated example, the bag-like recess 45 is disposed on the extension line on the downstream end side of the pressure regulating path upstream portion 35a. Therefore, when the mounting base member 2 is molded, the fuel passage 28 in the fuel take-out pipe 12, the pressure regulating The road upstream portion 35a and the bag-like recess 45 can be formed by a common core.

  The fuel discharge pipe 30 is disposed on one side of the upper end surface of the upper bearing bracket 18, and a power supply terminal 47 of the electric motor E is projected on the other side. On the other hand, the mounting base member 2 is integrally formed with a power feeding coupler 48 protruding from the upper surface thereof, and a connection terminal 49 in the coupler 48 and the power feeding terminal 47 are connected via a relay conductor 50.

  The downstream end of the pressure adjusting path 35, that is, the lower open end of the valve chamber 42 of the regulator valve R is directed to the upper surface 18a of the upper bearing bracket 18 on which the power supply terminal 47 projects, that is, the upper surface of the electric pump Ep. The fuel discharged from the valve chamber 42 falls on the upper surface 18 a of the upper bearing bracket 18 around the power supply terminal 47. In order to recirculate the dropped fuel into the fuel tank T, a notch window 51 is provided on the peripheral wall of the upper pump holder 3A.

  Next, the operation of the first embodiment will be described.

  When the electric motor E is operated in the electric pump Ep, the pump impeller 24 is rotationally driven by the rotor shaft 20a. Along with this, the fuel in the fuel tank T is sucked into the pump chamber 22 from the suction port 25 while being filtered by the fuel strainer 4, boosted by the pump impeller 24, and pumped into the stator 17 from the discharge port 27, and the final discharge port 34. To the fuel injection valve I through the fuel discharge pipe 30 and the fuel take-out pipe 12, that is, the fuel passage 28.

  Meanwhile, the pressure of the fuel passage 28, that is, the discharge pressure of the electric pump Ep acts on the valve body 39 of the regulator valve R via the pressure regulating path upstream portion 35a. Therefore, if the discharge pressure of the electric pump Ep exceeds a predetermined value, When the body 39 opens against the set load of the pressure regulating spring 40, a part of the fuel in the fuel passage 28 is discharged to the valve chamber 42 side, and the pressure in the fuel passage 28 returns to a predetermined value, the valve body 39 is closed again by the set load of the pressure regulating spring 40. Thus, the pressure in the fuel passage 28 is automatically adjusted to a predetermined value, so that the fuel injection pressure from the fuel injection valve I is properly controlled.

  The fuel discharged from the valve chamber 42 of the regulator valve R falls on the upper surface 18a of the upper bearing bracket 18 around the power supply terminal 47, that is, the upper surface of the electric pump Ep, and passes through the notch window 51 of the upper pump holder 3A. To return to the fuel tank T. Accordingly, since the periphery of the power supply terminal 47 is washed all the time with the fuel discharged from the regulator valve R, the fuel does not stay around the power supply terminal 47, and the power supply terminal 47 of the power supply terminal 47 due to moisture contained in the retained fuel does not remain. Corrosion can be prevented in advance.

  Further, the fuel that has fallen on the upper surface 18a of the upper bearing bracket 18 is kinetic energy attenuated there, and then gently flows down from the cutout window 51 of the upper pump holder 3A onto the stored fuel in the fuel tank T. Therefore, the falling sound of fuel can be prevented.

  Further, if the discharge pressure pulsates during discharge of fuel from the electric pump Ep to the fuel passage 28, the pulsation is transmitted to the pressure regulating path upstream portion 35a side, but before reaching the regulator valve R, the regulator valve R It is attenuated by being transmitted to the bag-like recess 45 branched from before R and colliding with its inner wall. As a result, the vibration of the valve body 39 of the regulator valve R due to the pulsation of the discharge pressure of the electric pump Ep can be prevented, the proper pressure regulating function of the regulator valve R can be ensured, and the fuel of the fuel injection valve I can be secured. The injection pressure can be stabilized.

  Also, the pressure pulsation may occur in the fuel passage 28 even when the fuel injection valve I is opened and closed. The pulsation can also be attenuated by the same action as described above, and the regulator valve R can be opened and closed. Pressure pulsation may occur, but the pulsation can also be attenuated by the same action as described above.

  In addition, the pulsation damping of the pressure in the fuel passage 28 is achieved by an extremely simple damping means that branches the bag-like recess 45 from the front of the regulator valve R, so that the number of parts is not increased and the cost of the fuel supply module M is increased. It is not necessary to invite.

  Next, a second embodiment of the present invention shown in FIG. 3 will be described.

  This second embodiment has the same configuration as that of the previous embodiment except that the fuel filter 55 is loaded in the upstream side 35a of the pressure adjusting path. In FIG. 3, the same parts as those in the previous embodiment are the same. A referential mark is attached | subjected and the overlapping description is abbreviate | omitted.

  According to the second embodiment, the pulsation of the discharge pressure transmitted from the electric pump Ep to the pressure regulating path 35 side can be attenuated by the fuel filter 55. Further, if the fuel filter 55 is used in combination with the bag-like recess 45 of the previous embodiment, the pulsation of the discharge pressure can be attenuated more effectively.

  Thus, also in the second embodiment, it is possible to effectively prevent the vibration of the valve body 39 of the regulator valve R caused by the pulsation of the discharge pressure of the electric pump Ep and to ensure an appropriate pressure regulating function of the regulator valve R. . In addition, the pulsation damping of the discharge pressure of the electric pump Ep is achieved by a very simple damping means of loading the fuel filter 55 in the pressure regulating path upstream portion 35a, so that the cost of the fuel supply module M is hardly increased. . In addition, since the fuel directed to the regulator valve R can be filtered by the fuel filter 55, it is possible to prevent the regulator valve R from being clogged.

  Next, a third embodiment of the present invention shown in FIGS. 4 and 5 will be described.

  In the third embodiment, a rectifying member 56 formed by radially arranging a plurality of rectifying blades 56a, 56a ... is provided at the inlet of the regulator valve R to rectify the flow of fuel toward the regulator valve R. Except for this, the configuration is the same as that of the first embodiment. In FIGS. 4 and 5, the same reference numerals are assigned to the portions corresponding to those of the first embodiment, and the duplicated description is omitted.

  According to the third embodiment, the pulsation of the discharge pressure transmitted from the electric pump Ep to the pressure regulating path 35 side is attenuated by rectifying the flow of fuel toward the regulator valve R by the rectifying member 56. be able to. Further, if the rectifying member 56 is used in combination with the bag-like recess 45 of the first embodiment, the pulsation of the discharge pressure can be attenuated more effectively.

  Thus, also in the third embodiment, vibration of the valve body 39 of the regulator valve R due to pulsation of the discharge pressure of the electric pump Ep can be prevented, and an appropriate pressure regulating function of the regulator valve R can be ensured. In addition, the pulsation damping of the discharge pressure of the electric pump Ep is achieved by a very simple damping means in which the rectifying member 56 is disposed at the inlet of the regulator valve R, so that the cost of the fuel supply module M is hardly increased. .

  Next, a fourth embodiment of the present invention shown in FIG. 6 will be described.

  In the fourth embodiment, an expansion chamber 57 is formed in the middle of the pressure regulating path 35 upstream from the regulator valve R. Specifically, at least one of the opposing surfaces of the mounting base member 2 and the valve housing 36 is provided. A recess 57a is formed and the inside thereof is an expansion chamber 57. Since the other configuration is the same as that of the first embodiment, the same reference numerals are given to portions corresponding to those of the first embodiment in FIG.

  According to the fourth embodiment, the pulsation of the discharge pressure transmitted from the electric pump Ep to the pressure regulating path 35 side can be attenuated in the expansion chamber 57 before the regulator valve R. If the expansion chamber 57 is used in combination with the bag-like recess 45 of the first embodiment, the pulsation of the discharge pressure can be attenuated more effectively.

  Thus, also in the fourth embodiment, it is possible to prevent vibration of the valve body 39 of the regulator valve R due to pulsation of the discharge pressure of the electric pump Ep, and to ensure an appropriate pressure regulating function of the regulator valve R. Moreover, the pulsation damping of the discharge pressure of the electric pump Ep is achieved by an extremely simple damping means in which an expansion chamber 57 is formed in the middle of the pressure regulating path 35 upstream from the regulator valve R, so that the number of parts does not increase, There is no need to increase the cost of the fuel supply module M. In particular, if the expansion chamber 57 is constituted by a recess 57a formed on at least one of the mounting base member 2 and the opposed surface of the valve housing 36, the expansion chamber 57 is formed simultaneously with the molding of the mounting base member 2 or the valve housing 36. It is possible to suppress the increase in production cost.

  Finally, a fifth embodiment of the present invention shown in FIG. 7 will be described.

  In the fifth embodiment, the pressure regulating path 35 is constituted by a horizontal pressure regulating path upstream portion 35a connected to the fuel passage 28 and a vertical pressure regulating path downstream portion 35b provided with the regulator valve R. The pressure regulating path upstream portion 35a and the pressure regulating path downstream portion 35b are arranged eccentrically with each other so that a throttle-shaped communication portion 58 (a portion with a shaded pattern in the figure) is formed between them. Since the configuration is the same as that of the first embodiment, the same reference numerals are given to the portions corresponding to those of the first embodiment in FIG.

  According to the fifth embodiment, the pulsation of the discharge pressure transmitted from the electric pump Ep to the pressure regulation path 35 side is caused by the restriction of the throttle-like communication part 58 between the pressure regulation path upstream part 35a and the pressure regulation path downstream part 35b. This can be attenuated by resistance. If the expansion chamber 57 is used in combination with the bag-like recess 45 of the first embodiment, the pulsation of the discharge pressure can be attenuated more effectively.

  Thus, also in the fifth embodiment, vibration of the valve body 39 of the regulator valve R due to pulsation of the discharge pressure of the electric pump Ep can be prevented, and an appropriate pressure regulating function of the regulator valve R can be ensured. In addition, the pulsation attenuation of the discharge pressure of the electric pump Ep is mutually offset so that the horizontal pressure regulating path upstream portion 35a and the vertical pressure regulating path downstream portion 35b are formed between the throttle-shaped communication portions 58 therebetween. Since this is achieved by a very simple damping means that is arranged with care, the number of parts does not increase and the cost of the fuel supply module M does not increase.

  The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, when the upper end of the lower pump holder 3B protrudes upward beyond the upper surface 18a of the electric pump Ep, the fuel discharged from the regulator valve R dropped on the upper surface 18a is caused to flow down into the fuel tank T. The notch window 51 is provided in the lower pump holder 3B.

The perspective view of the fuel supply module which concerns on 1st Example of this invention. The longitudinal cross-sectional view which shows the fuel supply module in the attachment state to a fuel tank. The principal part longitudinal cross-sectional view of the fuel supply module which concerns on 2nd Example of this invention. The principal part longitudinal cross-sectional view of the fuel supply module which concerns on 3rd Example of this invention. FIG. 5 is a sectional view taken along line 5-5 of FIG. The principal part longitudinal cross-sectional view of the fuel supply module which concerns on 4th Example of this invention. FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 2, showing a fifth embodiment of the present invention.

Explanation of symbols

Ep ... Electric pump M ... Fuel supply module R ... Regulator valve T ... Fuel tank 1 ... Mounting wall (ceiling wall)
2... Mounting base member 12... Fuel take-out pipe 28... Fuel passage 35... Pressure regulating path 35 a. 45..Bag-shaped recess (pulsation damping means)
55... Fuel filter (pulsation damping means)
56 .... Rectifying member (pulsation damping means)
57 .... Expansion chamber (pulsation damping means)
58... Restricted communication part (pulsation damping means

Claims (7)

An attachment base member (2) attached to the attachment wall (1) of the fuel tank (T) and projecting the fuel take-out pipe (12) to the outside, and a fuel tank (T) supported by the attachment base member (2) An electric pump (Ep) pumped up in the fuel tank (T) and sent to the fuel take-out pipe (12), and a part of the fuel discharged from the electric pump (Ep) is supplied to the fuel tank (T). In a fuel supply module (M) comprising a regulator valve (R) provided on the mounting base member (2) to recirculate inside and adjust its discharge pressure,
A pressure regulating path (35) branched from a fuel passage (28) communicating between the discharge side of the electric pump (Ep) and the fuel take-out pipe (12) is opened into the fuel tank (T). The regulator valve (R) is provided in the pressure adjusting passage (35), and the fuel passage (28 is provided in the pressure adjusting passage (35) upstream of the regulator valve (R). A fuel supply module comprising pulsation damping means (45, 55, 56, 57, 58) for attenuating pressure pulsation generated on the) side. The fuel supply module according to claim 1,
The fuel supply module according to claim 1, wherein the pulsation damping means comprises a bag-like recess (45) branched from a pressure regulating path (35) upstream of the regulator valve (R). The fuel supply module according to claim 1,
The fuel supply module according to claim 1, wherein the pulsation damping means comprises a fuel filter (55) mounted in a pressure regulation path (35) upstream of the regulator valve (R). The fuel supply module according to claim 1,
The fuel supply module according to claim 1, wherein the pulsation damping means comprises a rectifying member (56) provided in a pressure regulating path (35) upstream of the regulator valve (R). The fuel supply module according to claim 1,
The fuel supply module, wherein the pulsation damping means comprises an expansion chamber (57) formed in the middle of a pressure regulating path (35) upstream of the regulator valve (R). The fuel supply module according to claim 5, wherein
The valve housing (36) of the regulator valve (R) is configured separately from the mounting base member (2), and is fitted and fixed to the mounting base member (2). These mounting base members (2) And a recess (57a) to be the expansion chamber (57) is formed on at least one of the surfaces facing the valve housing (36). The fuel supply module according to claim 1,
The pressure adjusting passage (35) is divided into a horizontal pressure adjusting passage upstream portion (35a) connected to the fuel passage (28) and a vertical pressure adjusting passage downstream portion (35b) provided with the regulator valve (R). The pressure regulating passage upstream portion (35a) and the pressure regulating passage downstream portion (35b) are arranged eccentrically with each other so that a throttle-like communication portion (58) is formed therebetween, and the throttle-like communication is provided. The fuel supply module is characterized in that the damping means is configured by the section (58).

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