JP5048525B2 - Fuel supply module - Google Patents

Description

The present invention mainly relates to a fuel supply module for supplying fuel to an engine fuel injection valve, and in particular, a mounting base attached to a ceiling wall of a fuel tank, a fuel take-out pipe projecting from the upper surface of the mounting base, and a mounting base. A module body composed of a coupler projecting from the upper surface of the housing and a pump holding portion connected to the lower portion of the mounting base, and pumping the fuel in the fuel tank to the pump holding portion and projecting to the fuel take-out pipe A fuel supply module in which a pump is held, a power supply terminal for supplying power to the electric pump is embedded in the coupler, and a regulator valve for adjusting the pressure in the fuel passage to a predetermined pressure is attached to the lower surface of the mounting base. Regarding improvements.

Such a fuel supply module is already known as disclosed in Patent Document 1.
JP 2007-291867 A

  In such a conventional fuel supply module, the module body is integrally formed. For example, when molding multiple types of module bodies with different directions of the fuel take-out pipe, multiple types of molding dies corresponding to the types are formed. Needed. Therefore, the total production cost of a plurality of types of molds increases, which affects the cost of the fuel supply module, and it is extremely difficult to reduce the cost.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a fuel supply module including a plurality of types of module bodies at a low cost, such as by changing the direction of a fuel take-out pipe. .

In order to achieve the above object, the present invention provides a mounting base attached to a ceiling wall of a fuel tank, a fuel take-out pipe projecting from the upper surface of the mounting base, a coupler projecting from the upper surface of the mounting base, and a mounting base. A pump holding unit connected to the lower part of the module body, and the pump holding unit holds an electric pump that pumps up fuel in a fuel tank and discharges it to the fuel take-out pipe through a fuel passage; In the fuel supply module, a power supply terminal for supplying power to the electric pump is embedded in the coupler, and a regulator valve for adjusting a pressure in the fuel passage to a predetermined pressure is attached to a lower surface of the mounting base. and a first block comprising the mounting base, the fuel takeout tube and its root A second block including a first boss protrudes from the outer peripheral surface of the fuel take-out pipe supporting a third block including a second boss to support the coupler and its base, and the fourth block includes a pump holding portion divided, these split surfaces of the first to fourth blocks mutually welded as the bonding surface, is the first and at least one of the second joining surface is the weld to each other of the first and second blocks, said fuel An annular passage groove communicating with the take-out pipe is provided so as to concentrically surround the axis of the first boss, and the fuel passage is configured with the annular passage groove by opening the annular passage groove in the first block. The first feature is that there are provided a through hole and a communication hole that opens to the annular passage groove and communicates the annular passage groove with the valve hole of the regulator valve .

The communication hole corresponds to the small hole 50 in the embodiment of the present invention described later.

The present invention, in addition to the first feature, on the one and the other of said first and second joint surfaces, provided positioning shaft and positioning holes fitted to each other on the axis of the first boss, respectively This is the second feature.

According to a first aspect of the present invention, a portion of the first to fourth blocks, leave shapes and dimensions different kinds available, combined portion of only the other blocks and the set blocks of plurality of types As a result, a plurality of types of module bodies having different shapes and dimensions can be obtained. Therefore, when manufacturing such multiple types of module bodies, it is possible to respond by simply preparing molds corresponding to some blocks of multiple types. Compared to the case where multiple types are prepared, the production cost of the mold can be greatly reduced. In addition, by dividing the module body into the first to fourth blocks, the shape of each block can be simplified, and therefore the shape of the mold corresponding to each block is also simplified. Contributes to reduction of production costs. Thus, a fuel supply module including a plurality of types of module bodies can be provided at low cost.

Further , the fuel take-out pipe protrudes from the outer peripheral surface of the first boss, and at least one of the first and second joining surfaces welded to each other communicates with the fuel take-out pipe. By providing an annular passage groove concentrically surrounding the axis of the first boss, the first block rotates around the axis of the first boss when the first and second joint surfaces are welded together. Thus, the direction of the fuel take-out pipe can be freely set in a desired direction, and therefore, a plurality of types of module bodies having different directions of the fuel take-out pipe can be provided easily and inexpensively. In addition, the communication state of the electric pump / regulator valve and the fuel take-out pipe can be maintained via the annular passage groove.

According to the second feature of the present invention, when the orientation of the fuel take-out pipe is set to a desired direction by the rotation of the first boss, the first and second annular passage grooves are formed by fitting the positioning shaft and the positioning hole. The facing state can always be properly maintained.

  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 plan view showing a fuel supply module according to an embodiment of the present invention attached to a fuel tank, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG. 3 is an exploded view of the module body in FIG. It is.

  First, in FIG. 1 and FIG. 2, the fuel supply module of the present invention supplies fuel in the fuel tank T to the fuel injection valve I of the engine on the ceiling wall 10 of the fuel tank T mounted on a vehicle such as a motorcycle. M is attached.

The fuel supply module M is attached to a module body B made of synthetic resin, a regulator valve 41 attached to the module body B, the electric pump 2 held at the lower part of the module body B, and a lower end of the electric pump 2. The fuel strainer 3 is provided. The module body B includes a mounting base 4, a fuel take-out pipe 5 projecting from the upper surface of the mounting base 4, a coupler 6 projecting from the upper surface of the mounting base 4, and a pump connected to the lower portion of the mounting base 4. It consists of a holding part 7.

  On the other hand, the ceiling wall 10 of the fuel tank T is provided with an opening 11 for inserting the electric pump 2 therein, and a mounting ring 12 surrounding the opening 11 is fixed. A plurality of mounting bolts 15 protruding from the upper surface of the mounting ring 12 are fixed.

  The mounting base 4 is overlaid on the upper surface of the mounting ring 12 so that the outer periphery thereof closes the opening 11. A plurality of bolt holes 14 are provided in the outer peripheral portion of the mounting base 4, and the mounting base 4 is constituted by a plurality of mounting bolts 15 inserted through the bolt holes 14 and a plurality of nuts 16 screwed to these. Is fixed to the mounting ring 12. At that time, an annular sealing member 17 for sealing the opening 11 is interposed between the mounting base 4 and the ceiling wall 10 of the fuel tank T.

  A circular first boss 5 a that supports the base of the fuel take-out pipe 5 is formed at the center of the upper surface of the mounting base 4. The fuel take-out pipe 5 protrudes in the horizontal direction from the outer peripheral surface of the first boss 5a, and a fuel supply conduit 18 connected to the fuel injection valve I of the engine is connected to the outer end of the fuel take-out pipe 5. It has become so. A square second boss 6a for supporting the base of the coupler 6 is formed on the upper surface of the mounting base 4 adjacent to the first boss 5a.

  Further, a cylindrical pump holding portion 7 to which the outer periphery of the upper end portion of the electric pump 2 is fitted is formed on the lower surface of the mounting base 4. A plurality of locking holes 19 are provided in the peripheral wall of the pump holding part 7, while a plurality of elastic locking claws 20 are provided on the outer periphery of the upper end of the electric pump 2. The pawls 20 are engaged with each other when the upper end portion of the electric pump 2 is fitted to the inner periphery of the pump holding portion 7 so that the electric pump 2 is held by the pump holding portion 7.

  The electric pump 2 includes an electric motor 23 having a rotor 25 directed in the vertical direction and a fuel pump 24 driven by the electric motor 23. The electric motor 23 is coupled to a cylindrical stator 26 having a plurality of magnets 26a aligned in the circumferential direction on an inner peripheral surface, an upper bearing bracket 27 that is caulked to the upper end of the stator 26, and a lower end portion thereof. The lower bearing bracket 28 and the rotor 25 on which the rotor shaft 25 a is supported by the upper and lower bearing brackets 27, 28.

  The fuel pump 24 includes a pump case 31 that is caulked to the stator 26 together with the lower bearing bracket 28 so as to define a pump chamber 30 between the lower bearing bracket 28 and the lower surface of the lower bearing bracket 28. The pump impeller 32 connected to the lower end portion of 25a is configured in a Wesco type.

  The pump case 31 is provided with a suction port 33 that opens to the pump chamber 30, and the fuel strainer 3 disposed at the bottom of the fuel tank T in communication with the suction port 33 is attached to the pump case 31. The lower bearing bracket 28 is provided with a discharge port 34 that communicates with the pump chamber 30 and the stator 26.

  The upper bearing bracket 27 is integrally formed with a fuel discharge pipe 36 that protrudes upward and has a final discharge port 35 that communicates with the inside of the stator 26, and in which the fuel flows backward to the final discharge port 35. A check valve 37 is provided for blocking. On the other hand, a connecting cylinder 38 coupled to the inside of the pump holding portion 7 is integrally formed on the mounting base 4, and the fuel discharge pipe 36 is fitted to the inner peripheral surface of the connecting cylinder 38 via a seal member 39. The

  The module body B is provided with a fuel passage 40 through which the fuel discharge pipe 36 communicates with the fuel take-out pipe 5 through the inside of the connecting pipe 38, and the pressure in the fuel passage 40 is supplied to the fuel from the fuel injection valve I. A regulator valve 41 for adjusting to a predetermined pressure suitable for injection is attached to the attachment base 4.

  1 and 2, the module body B includes a first block B1 including a mounting base 4 and a regulator valve 41, a second block B2 including a first boss 5a and a fuel take-out pipe 5, a second boss 6a and a coupler. 6 and a fourth block B4 including the pump holding portion 7 and the connecting cylinder 38 are divided by horizontal dividing planes parallel to each other, all of which are individually molded using synthetic resin as a raw material. .

  Here, the opposing divided surfaces of the first block B1 and the second block B2 are first and second joining surfaces P1 and P2, and the opposing divided surfaces of the first block B1 and the third block B3 are 3 and the fourth joint surfaces P3 and P4, and the first and fourth blocks B1 and B4 facing each other are the fifth and sixth joint surfaces P5 and P6.

  The first and second joint surfaces P1 and P2 have a circular shape centered on the axis Y of the first boss 5a of the fuel take-out pipe 5, and the first and second joint surfaces P1 and P2 include the first and second joint surfaces P1 and P2. A positioning shaft 43 and a positioning hole 44 that are fitted to each other on the axis Y of the boss 5a are provided. In the illustrated example, a positioning shaft 43 is provided on the first joint surface P1 side and a positioning hole 44 is provided on the second joint surface side. On the contrary, the positioning shaft 43 and the first joint surface are provided on the second joint surface P2 side. A positioning hole 44 can also be provided on the side.

  The first and second joint surfaces P1 and P2 include first and second annular passage grooves 45 and 46 that concentrically surround the positioning shaft 43 and the positioning hole 44 and face each other. First and second annular grooves 47 and 48 are provided, which concentrically surround the annular passage grooves 45 and 46 and face each other. The second annular passage groove 46 is formed relatively deep so as to communicate with the inside of the fuel take-out pipe 5. The first block B1 is provided with a first through hole 49 and a small hole 50 that open to the first annular passage groove 45. The first through hole 49 communicates with the final discharge port 35 of the electric pump 2, and the small hole 50 communicates with the valve hole 61 of the regulator valve 41.

  Thus, the first and second joint surfaces P1 and P2 are welded to each other in the fitted state of the positioning shaft 43 and the positioning hole 44, whereby the first and second blocks B1 and B2 are integrally coupled to each other. Is done. At this time, the direction of the fuel take-out pipe 5 can be freely set in a desired direction by rotating the first boss 5a of the fuel take-out pipe 5 around the positioning shaft 43 by an arbitrary angle. In addition, since the opposing state of the first and second annular passage grooves 45 and 46 does not change, the first through hole 49 and the small hole 50 and the fuel take-out pipe 5 are interposed via the first and second annular passage grooves 45 and 46. In other words, the communication state between the electric pump 2 and the regulator valve 41 and the fuel take-out pipe 5 can be maintained. Further, burrs generated when the first and second joint surfaces P1 and P2 are welded are received in the first and second annular grooves 47 and 48 facing each other.

  The third block B3 is integrally formed with a connecting cylinder 51 that protrudes downward from the center of the fourth joint surface P4, and allows the connecting cylinder 51 to penetrate to the center of the third joint surface P3. A through hole 52 is provided in the first block B1. In the third block B <b> 3, a power feeding terminal 53 is embedded so that both ends of the coupler 6 and the connecting cylinder 51 are exposed. The power supply terminal 53 in the connection cylinder 51 is connected to a current-carrying terminal 54 protruding from the upper surface of the electric motor 23 through a conducting wire 57 that passes through the locking hole 19 of the pump holding portion 7.

  Thus, the third and fourth joint surfaces P3 and P4 are welded to each other, whereby the first and third blocks B1 and B3 are integrally coupled to each other.

  The lower end of the first through hole 49 is opened on the fifth joint surface P5 of the first block B1, and the second through hole 55 communicating with the first through hole 49 is opened on the sixth joint surface P6. Provided in the fourth block B4. The lower end of the second through hole 55 is formed so as to open into the connecting cylinder 38 of the fourth block B4. Accordingly, the first and second annular passage grooves 45, 46, the first through hole 49 and the second through hole 55 communicating with each other are connected to the fuel discharge pipe 36 of the electric pump 2 via the inside of the connecting cylinder 38. The fuel passage 40 communicating with the take-out pipe 5 is configured.

  The first block B1 is provided with an attachment hole 56 that opens to the fifth joint surface P5 so as to communicate with the small hole 50, and the regulator valve 41 is attached to the attachment hole 56. The regulator valve 41 includes a bottomed cylindrical valve housing 60 that is molded separately from the mounting base 4, and a valve hole 61 that passes through the end wall of the valve housing 60, and the valve hole 61. And a conical valve seat 62 connected to the inner end. In the valve housing 60, a ball-shaped valve body 63 that can be seated on the valve seat 62, a poppet-type valve retainer 64 that rotatably supports the valve body 63 on the side opposite to the valve seat 62, and the valve retainer A valve spring 65 for energizing the valve body 63 with a predetermined set load in the seating direction with the valve seat 62 via the 64 is accommodated, and supports a fixed end portion of the valve spring 65 and a stem of the valve retainer 64 A guide member 66 that slidably supports the portion 64 a in the opening / closing direction of the valve body 63 is press-fitted and fixed to the inner peripheral surface of the valve housing 60. The set load of the valve spring 65 on the valve body 63 is adjusted by adjusting the press-fitting depth of the guide member 66 into the inner peripheral surface of the valve housing 60. The guide member 66 is provided with an open hole 67 that communicates with the inside and outside of the guide member 66. The regulator valve 41 is attached to the first block B1 by press-fitting the valve housing 60 into the attachment hole 56 via the seal member 68. At this time, the small hole 50 and the valve hole 61 are connected to the attachment hole 56. It will be communicated through.

  Thus, the fifth and sixth joint surfaces P5 and P6 are welded to each other, whereby the first and fourth blocks B1 and B4 are integrally coupled to each other, and the first through hole 49 and the second passage are connected. The hole 55 is held in communication.

  Next, the operation of this embodiment will be described.

  In the electric pump 2, when the electric motor 23 is operated, the pump impeller 32 is rotationally driven by the rotor shaft 25a. Along with this, fuel in the fuel tank T is sucked into the pump chamber 30 from the suction port 33 while being filtered by the fuel strainer 3, boosted by the pump impeller 32, and pumped from the discharge port 34 into the stator 26, and the final discharge port 35 To the fuel injection valve I through the fuel discharge pipe 36, the fuel passage 40, the fuel take-out pipe 5 and the fuel supply pipe 18, and the fuel is injected into an engine (not shown).

  Meanwhile, the pressure of the fuel passage 40, that is, the discharge pressure of the electric pump 2, acts on the valve body 63 of the regulator valve 41 via the small hole 50 and the valve hole 61, so that the discharge pressure of the electric pump 2 exceeds a predetermined value. When the valve body 63 opens against the set load of the pressure regulating spring 65, a part of the fuel in the fuel passage 40 is discharged into the valve housing 60, and the pressure in the fuel passage 40 returns to a predetermined value, The valve body 63 is closed again by the set load of the pressure regulating spring 65. Thus, the pressure in the fuel passage 40 is automatically adjusted to a predetermined value, so that the fuel injection pressure from the fuel injection valve I is properly controlled.

  Further, the fuel discharged into the valve housing 60 falls from the opening hole 67 of the guide member 66 to the upper surface of the upper bearing bracket 27 and returns to the fuel tank T from the locking hole 19 of the pump holding portion 7 or the like.

By the way, in such a fuel supply module M, the module body B made of synthetic resin attached to the fuel tank T while holding the electric pump 2 includes the first block B1 including the attachment base 4 and the regulator valve 41, and the fuel take-out. The pipe 5 and the second block B2 including the first boss 5a, the coupler 6 and the third block B3 including the second boss 6a, and the fourth block B4 including the pump holding portion 7 and the connecting cylinder 38 are parallel to each other. Since the module body B is configured by welding the divided surfaces of the first to fourth blocks B1 to B4 as the joint surfaces P1 to P6, the first to fourth blocks B1 to B4 are divided. part, shape and size leave different types prepared, dissolved and some of these plural kinds blocks mutually combined saw other blocks and the set of By, it is possible to obtain different plural kinds of modules the body B of shapes and sizes. Therefore, when such a plurality of types of module bodies B are manufactured, it is possible to cope only by preparing a molding die corresponding to a plurality of types of partial blocks. Compared to the case where multiple types are prepared, the production cost of the mold can be greatly reduced. In addition, by dividing the module body B into the first to fourth blocks B1 to B4, the shape of each block can be simplified, and therefore the shape of the molding die corresponding to each block is also simplified. Contributes to a reduction in the production cost of the mold. Thus, a fuel supply module including a plurality of types of module bodies can be provided at low cost.

  In particular, the fuel take-out pipe 5 is protruded from the outer peripheral surface of the first boss 5a, and one and the other of the first and second joint surfaces P1, P2 welded to each other of the first and second blocks B1, B2 are respectively A positioning shaft 43 and a positioning hole 44 which are fitted to each other on the axis Y of the first boss 5a are provided, and the positioning shaft 43 and the positioning hole 44 are concentrically surrounded on the first and second joint surfaces P1 and P2. Thus, first and second annular passage grooves 45 and 46 that face each other are provided, and a first through hole 49 that communicates with the fuel discharge pipe 36 of the electric pump 2 is opened in the first annular passage groove 45 to form a second annular passage. Since the fuel take-out pipe 5 is communicated with the passage groove 46, when the first and second joint surfaces P1 and P2 are welded together, the fuel take-out pipe 5 is rotated by rotating the first block B1 around the positioning shaft 43. As shown by the chain line in FIG. It can be set freely in the direction of Nozomu, thus providing easy and inexpensive to a plurality of types of module bodies B having different orientations of the fuel extraction pipe 5. In addition, since the opposed state of the first and second annular passage grooves 45 and 46 can always be properly maintained by fitting the positioning shaft 43 and the positioning hole 44, the first and second annular passage grooves 45, The communication state between the first through hole 49 and the small hole 50 and the fuel take-out pipe 5 via the 46, that is, the communication state between the electric pump 2 and the regulator valve 41 and the fuel take-out pipe 5 can be maintained.

  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, only one of the first and second annular passage grooves 45 and 46 may be provided on the first joint surface P1 or the second joint surface P2, and the first through hole 49 and the fuel extraction pipe 5 may be communicated with each other. Similar effects can be obtained.

The top view which shows the fuel supply module which concerns on the Example of this invention in the attachment state to a fuel tank. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. The exploded view of the module body in FIG.

B... Module bodies B1 to B4... First to fourth blocks M... Fuel supply modules P1 to P6. Fuel tank 2... Electric pump 4... Mounting base 5... Fuel take-out pipe 5 a... First boss 6. 7. Pump holding part 10 ... ceiling wall 40 ... fuel passage
41 .... Regulator valve 43 ... Positioning shaft 44 ... Positioning hole 45 ... Ring passage groove (first ring passage groove)
46... Annular passage groove (second annular passage groove)
49 .... Through hole (first through hole)
50 ... Communication hole (small hole)
53... Feed terminal
61 ... Valve hole

Claims (2)

A mounting base (4) attached to the ceiling wall (10) of the fuel tank (T), a fuel take-out pipe (5) protruding from the upper surface of the mounting base (4), and also protruding from the upper surface of the mounting base (4) A module body (B) comprising a coupler (6) and a pump holding part (7) connected to the lower part of the mounting base (4). The pump holding part (7) includes a fuel tank (T). An electric pump (2) that pumps up the fuel inside and discharges it to the fuel take-out pipe (5) through the fuel passage (40) is held, and a power supply terminal (53) for supplying electric power to the electric pump (2) is provided. the embedded in coupler (6), a lower surface, a fuel supply module odor comprising the pressure in the fuel passage (40) is attached to the regulator valve (41) for adjusting the predetermined pressure of the mounting base (4) ,
The module body (B) is supported by the first block (B1) including the mounting base (4), the fuel take-out pipe (5), and the base of the fuel take-out pipe (5) from the outer peripheral surface. A second block (B2) including a first boss (5a) to be projected, a third block (B3) including a second boss (6a) supporting the coupler (6) and its root, and a pump holding portion (7 ) Including the fourth block (B4),
The divided surfaces of these first to fourth blocks (B1 to B4) are welded to each other as bonding surfaces (P1 to P6) ,
At least one of the first and second joint surfaces (P1, P2) welded to each other of the first and second blocks (B1, B2) has an annular passage groove (45) communicating with the fuel take-out pipe (5). , 46) so as to concentrically surround the axis (Y) of the first boss (5a),
The first block (B1) has a through hole (49) that opens into the annular passage groove (45, 46) and forms the fuel passage (40) together with the annular passage groove (45, 46). A communication hole (50) that opens into the annular passage groove (45, 46) and communicates the annular passage groove (45, 46) with the valve hole (61) of the regulator valve (41) is provided . Fuel supply module. The fuel supply module according to claim 1 ,
Said first and second joint surfaces (P1, P2) while the and the other of the positioning shaft to be fitted with each other on the axial (Y) of said first boss (5a) (43) and the positioning hole (44) Each of the fuel supply modules is provided.

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