JP5276848B2 - Fuel supply module - Google Patents

Abstract

A fuel supply module is provided that includes a module body (B) formed from a mounting base (4), a fuel feed pipe (5), and a pump holding part (7) provided so as to be connected to a lower part of the mounting base (4), wherein the module body (B) is divided into a first block (B1) that includes the mounting base (4), a second block (B2) that includes the fuel feed pipe (5) and its boss (5a), and a fourth block (B4) that includes the pump holding part (7), a boss extension part (5b) extending downward from the boss (5a) is fitted into a support tube (4a) formed in the first block (B1), the support tube (4a) and the second block (B2) are welded, a third block (B3) is welded to an end face of the boss extension part (5b), the first and third blocks (B1, B3) are welded to each other, and the boss extension part (5b) and the third block (B3) are provided with first and second through holes (45, 46). It is thereby possible to provide at low cost a fuel supply module that includes a plurality of types of module bodies having, for example, different directions for a fuel feed pipe.

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 attached to an outer wall of a fuel tank, a fuel take-out pipe protruding from the upper surface of the mounting base, and a lower portion of the mounting base A module body comprising a pump holding part connected to the fuel pump, and holding the electric pump for pumping fuel in the fuel tank and discharging it to the fuel take-out pipe through the fuel passage in the pump holding part It relates to the improvement of the supply module.

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

  In the conventional fuel supply module, since 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 molds corresponding to the types are formed. Needed. Therefore, the total production cost of a plurality of types of molds is increased, 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 comprises a mounting base attached to an outer wall of a fuel tank, a fuel take-out pipe projecting from the upper surface of the mounting base, and a pump holding portion connected to a lower portion of the mounting base. A fuel supply module that holds an electric pump that pumps fuel in a fuel tank and discharges the fuel in a fuel tank to the fuel take-out pipe through a fuel passage. a first block including a mounting base, a second block including a boss for supporting the fuel takeout tube and its root, is divided into a third block including the pump holding part, in the first block, the mounting base forming a support tube that protrudes from the upper surface of the inner periphery of the support tube, extending axially downwardly from the boss Fitted scan extension, the a first bonding surface of the annular formed in the upper end of the support tube, welded and a second joint surface of the annular formed in the second block to each other, also of the boss extension part An annular third joint surface formed at the lower end and an annular fourth joint surface formed on the third block are welded together, and the first and third blocks are welded together, and the boss extension and the third block, Rutotomoni provided with the first and second through holes of the fuel passage, respectively, the two through holes, the inner side of the welded portion formed the third and fourth joint surface mutual annular The first feature is that they communicate with each other directly .

In addition to the first feature, the present invention has a second feature that the third and fourth joint surfaces are arranged closer to the inside of the fuel tank than the support tube.

In addition to the second feature of the present invention, the first block is provided with a relief on the lower surface of the first block for opening the peripheral edges of the third and fourth joint surfaces to the internal space of the fuel tank. Three features.

Furthermore, in addition to any of the first to third features, the present invention has the third and fourth joint surfaces and the joint surfaces to which the first and third blocks are welded arranged on the same plane. This is the fourth feature.

  The boss corresponds to the first boss 5a in the embodiment of the present invention described later.

  According to the first feature of the present invention, a plurality of types having different shapes and dimensions are prepared for a part of the first to third blocks, and some of the plurality of types of blocks are combined with other blocks to mutually A plurality of types of module bodies having different shapes and dimensions can be obtained by welding to each other. Therefore, when manufacturing such multiple types of module bodies, it is possible to respond by simply preparing a mold corresponding to some blocks of multiple types. Compared with the case where a plurality of types are prepared, the manufacturing cost of the mold can be greatly reduced. In addition, by dividing the module body into the first to third 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.

Moreover, in the first block, to form a support tube that protrudes from the upper surface of the mounting base, the inner periphery of the support tube, extending axially downwardly from the boss for supporting the fuel take-out pipe and the base of the second block The boss extension is fitted, the first joint surface at the upper end of the support cylinder and the second joint surface of the second block are welded, and the third joint surface at the lower end of the boss extension and the fourth joint surface of the third block welded to each other, the boss extension part and the third block is provided with a first and second through holes constituting the fuel passage respectively Rutotomoni, the two through holes, the third and fourth joint surface mutual annular The welded portions of the first and second joint surfaces are arranged on the atmosphere side of the welded portions of the third and fourth joint surfaces through which the fuel passage passes. Therefore, the pressure of the fuel passage does not act on the welded portion of the first and second joint surfaces. . Therefore, even if the high-pressure fuel discharged from the electric pump leaks from the welded portions of the third and fourth joint surfaces on which the pressure acts due to poor welding or the like, the first and second joint surfaces The effect of preventing leakage to the outside can be expected by blocking at the welded portion.

  According to the second feature of the present invention, the third and fourth joint surfaces to be welded are arranged closer to the inside of the fuel tank than the support cylinder, so that the fuel is welded from the weld portion of the third and fourth joint surfaces. In the case of leakage, it can be immediately returned to the fuel tank, and coupled with the presence of the welded portions of the first and second joint surfaces, fuel leakage to the outside can be more reliably prevented.

  According to the third feature of the present invention, a relief for opening the peripheral edges of the third and fourth joint surfaces to be welded to the internal space of the fuel tank is provided on the lower surface of the first block. When fuel leaks from the welded portions of the third and fourth joint surfaces, it can be smoothly returned to the fuel tank through the escape immediately, and fuel leakage to the outside can be prevented more reliably.

  According to the fourth aspect of the present invention, the boss extension, that is, the welding of the first block and the third block, and the welding of the first and third blocks can be simultaneously performed by using the same hot plate, and the productivity is improved. It can contribute to improvement.

  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 includes a module body B made of synthetic resin, an electric pump 2 held at the lower part of the module body B, and a fuel strainer 3 attached to the lower end of the electric pump 2. The module body B includes a mounting base 4, a fuel take-out pipe 5 protruding from the upper surface of the mounting base 4, a coupler 6 protruding 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 seal 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 projects horizontally 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 continuously provided 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 portion 7. On the other hand, a plurality of elastic locking claws 20 are provided on the outer periphery of the upper end portion of the electric pump 2, and the locking holes 19 and the locking claws 20 are connected to the upper end portion of the electric pump 2 on the inner periphery of the pump holding portion 7. Are engaged with each other, and the electric pump 2 is held by the pump holding portion 7.

  The electric pump 2 includes an electric motor 23 having the rotor 25 oriented 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 fixed with a plurality of magnets 26a arranged 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. A lower bearing bracket 28, and a rotor 25 on which the rotor shaft 25a is supported by the upper and lower bearing brackets 27 and 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 surface of the lower bearing bracket 28 and a rotor shaft that is rotatably accommodated in the pump chamber 30. The pump impeller 32 connected to the lower end portion of 25a is configured as 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 interior of the stator 26. A check valve 37 is provided for blocking. On the other hand, the attachment base 4 is integrally formed with a connecting cylinder 38 coupled to the inside of the pump holding portion 7, 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 that communicates the fuel discharge pipe 36 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 module body B.

  1 and 2, the module body B includes a first block B1 including a mounting base 4, a second block B2 including a first boss 5a for supporting the fuel take-out pipe 5 and its root, a pump holding portion 7 and It is divided into a third block B3 including the connecting cylinder 38 and a fourth block B4 including the coupler 6 and the second boss 6a supporting the root thereof, all of which are individually molded using synthetic resin as a material.

  The first block B1 is integrally formed with a cylindrical support cylinder 4a that protrudes from the upper surface thereof. A tapered first joint surface P1 is formed at the upper end of the support cylinder 4a. On the other hand, the second block B2 has a boss extension 5b extending coaxially downward from the first boss 5a and fitting into the inner periphery of the support cylinder 4a, and an annular groove 21 sandwiching the upper portion of the boss extension 5b. A tapered second joint surface P2 is formed that is surrounded by The second bonding surface P2 and the first bonding surface P1 are welded to each other by ultrasonic welding or the like. Burrs generated during the welding are received in the annular groove 21.

  The boss extension 5b passes through the support cylinder 4a, and a lower end surface of the boss extension 5b is formed on a third joint surface P3 orthogonal to the axis of the first boss 5a. A vertical first through hole 45 opening in the surface P3 is provided in the second block B2. The second block B2 is formed with a semi-cylindrical connecting tube 56 that extends below the third joint surface P3, and a return hole 50 that communicates the fuel take-out pipe 5 with the upper end of the connecting tube 56. It is done.

  A regulator valve 41 is attached to the connection cylinder 56. The regulator valve 41 includes a bottomed cylindrical valve housing 60 that is molded separately from the mounting base 4 and is press-fitted into the connection cylinder 56 via a seal member 68. A valve hole 61 that passes through the wall and communicates with the return hole 50 and a conical valve seat 62 that communicates with the inner end of the valve hole 61 are formed in the wall. 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 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. After the regulator valve 41 is mounted on the connection cylinder 56, the lower end portion of the connection cylinder 56 is heat-caulked to prevent the regulator valve 41 from coming off.

  A fourth joint surface P4 facing the third joint surface P3 of the second block B2 is formed on the upper surface of the third block B3. On the lower surface of the first block B1, a lower end surface of the boss extension 5b fitted to the support cylinder 4a, that is, a fifth joint surface P5 arranged on the same plane as the third joint surface P3 is formed. A sixth joint surface P6 facing the fifth joint surface P5 is formed on the upper surface of the third block B3 so as to be aligned on the same plane as the fourth joint surface P4. The third block B3 has a second through hole 46 that opens to the fourth joint surface P4 and communicates with the first through hole 45, and a connecting cylinder 38 that communicates with the second through hole 46 inside. Provided in 3 blocks B3. In the third and fourth joint surfaces P3 and P4, annular grooves 47 and 48 are formed so as to surround the openings of the first and second through holes 45 and 46, respectively.

Thus, the third joint surface P3 and the fourth joint surface P4, and the fifth joint surface P5 and the sixth joint surface P6 are welded to each other, but the third joint surface P3 and the fifth joint surface P5. Since the fourth joint surface P4 and the sixth joint surface P6 are arranged on the same plane, these joint surfaces can be welded simultaneously by using the same hot plate. According to the welding of the third and fourth joint surfaces P3 and P4, the first through hole 45 and the second through hole 46 are inward of the welded portion that forms an annular shape between the third and fourth joint surfaces P3 and P4. The fuel passage 40 that communicates directly with each other on the side and communicates the fuel discharge pipe 36 of the electric pump 2 with the fuel take-out pipe 5 is formed. At this time, the burrs generated when the third and fourth joint surfaces P3 and P4 are welded to each other are received in the annular groove 21, so that the burrs protrude into the first and second through holes 45 and 46. Can be prevented.

  The lower surface of the first block B1 is provided with a concave relief 42 for opening the peripheral portions of the third and fourth joint surfaces P3 and P4 to be welded into the fuel tank T.

  Further, on the upper surface of the first block B1, a seventh joint surface P7 adjacent to the support cylinder 4a and a through hole 22 penetrating the central portion of the seventh joint surface P7 are provided. On the other hand, on the lower surface of the second boss 6a of the fourth block B4, an eighth joint surface P8 facing the seventh joint surface P7, and a semi-cylindrical protective cylinder projecting downward from the center of the eighth joint surface P8. 51 is integrally formed, and the protective cylinder 51 penetrates the through hole 22. In the fourth block B <b> 4, a power feeding terminal 53 is embedded so that both ends of the coupler 6 and the protective cylinder 51 are exposed. The power supply terminal 53 in the protective 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 seventh and eighth joint surfaces P7 and P8 are welded to each other, whereby the first and fourth blocks B1 and B4 are joined together.

  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, the 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, pressurized by the pump impeller 32, and pumped into the stator 26 from the discharge port 34, and the final discharge port 35. To the fuel injection valve I through the fuel discharge pipe 36, the fuel passage 40, that is, the first and second through holes 45 and 46, the fuel take-out pipe 5 and the fuel supply pipe 18, and 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 return 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 from the valve chamber 42 of the regulator valve 41 falls onto the upper surface of the upper bearing bracket 27 and returns to the fuel tank T from the locking hole 19 or the like of the pump holding portion 7.

  In assembling the module body B, first, the regulator valve 41 is mounted on the connection cylinder 56 of the second block B2, and then the boss extension 5b of the first block B1 is fitted to the support cylinder 4a of the first block B1. The first and second joint surfaces P1 and P2 are welded as described above. Further, the seventh joint surface P7 of the first block B1 and the eighth joint surface P8 of the fourth block B4 are welded as described above. Thus, the assembly of the mounting base 4, the fuel take-out pipe 5 and the coupler 6 is first manufactured.

  Next, the fourth joint surface P4 and the sixth joint surface P6 of the third block B3 are welded to the third joint surface P3 of the second block B2 and the fifth joint surface P5 of the first block B1, respectively, as described above. The module body B is completed.

  In the fuel supply module M, the module body B includes the first block B1 including the mounting base 4 and the second block B2 including the first boss 5a supporting the fuel take-out pipe 5 and the root thereof, as described above. And a third block B3 including the pump holding portion 7 and a fourth block B4 including the coupler 6 and the second boss 6a supporting the root thereof, which are individually molded and welded to form a module body. Since it constitutes B, a plurality of types having different shapes and dimensions are prepared for a part of the first to fourth blocks B1 to B4, and these plural types of partial blocks are combined with other blocks and welded to each other. By doing so, a plurality of types of module bodies B having different shapes and dimensions can be obtained. Therefore, when manufacturing such a plurality of types of module bodies B, it is possible to cope only by preparing a molding die corresponding to a plurality of types of partial blocks. Compared with the case where a plurality of types are prepared, the production cost of the mold can be greatly reduced. Moreover, since the module body B is divided into the first to fourth blocks B1 to B4, the shape of each block can be simplified, and therefore the shape of the mold 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.

  At this time, in particular, a support cylinder 4a is formed in the first block B1, and a boss extension 5b extending downward in the axial direction from the first boss 5a is fitted to the inner periphery of the support cylinder 4a. The first joint surface P1 at the upper end and the second joint surface P2 of the second block B2 are welded, and the third joint surface P3 at the lower end of the boss extension 5b and the fourth joint surface P4 of the third block B3 are welded. Further, the fifth joint surface P5 on the lower surface of the first block B1 and the sixth joint surface P6 on the upper surface of the third block B3 are welded, and the fuel passage 40 is in direct communication with the boss extension 5b and the third block B3. Since the first and second through holes 45 and 46 constituting the first and second through holes are provided, the first and second joint surfaces P1 are formed on the atmosphere side of the welded portions of the third and fourth joint surfaces P3 and P4 through which the fuel passage 40 passes. , P2 are disposed, and the first and second joints are arranged. P1, the pressure in the fuel passage 40 to the welded portion of the P2 does not act. Therefore, even if the high-pressure fuel discharged from the electric pump 2 leaks from the welded portions of the third and fourth joint surfaces P3 and P4 where the pressure acts, due to poor welding or the like, An effect of preventing leakage to the outside by blocking at the welded portions of the second joint surfaces P1 and P2 can be expected.

  In particular, since the third and fourth joint surfaces P3 and P4 to be welded are arranged closer to the inside of the fuel tank T than the support cylinder 4a, the fuel from the welded portions of the third and fourth joint surfaces P3 and P4. Can be returned to the fuel tank T, combined with the presence of the welded portions of the first and second joint surfaces P1 and P2, more reliably prevent fuel leakage to the outside. Can do.

  In addition, the first block B1 is provided with a relief 42 for opening the periphery of the third and fourth joint surfaces P3 and P4 to be welded to the internal space of the fuel tank T, so that the third and fourth joints are provided. When fuel leaks from the welded portions of the surfaces P3 and P4, it can be smoothly returned to the fuel tank T through the escape 42, and fuel leakage to the outside can be prevented more reliably.

  The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention.

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... Joint surfaces (first to sixth joint surfaces)
T ... fuel tank 2 ... electric pump 4 ... mounting base 4a ... support cylinder 5 ... fuel take-out pipe 5a ... boss (first boss )
7. Pump holding part 10 ... Outer wall (ceiling wall)
40 ... Fuel passage 42 ... Escape 45 ... First through hole 46 ... Second through hole

Claims (4)

An attachment base (4) attached to the outer wall (10) of the fuel tank (T), a fuel take-out pipe (5) protruding from the upper surface of the attachment base (4), and a lower part of the attachment base (4) are connected. A module body (B) comprising a pump holding part (7) and pumping up the fuel in the fuel tank (T) to the pump holding part (7) through the fuel passage (40). In the fuel supply module that holds the electric pump (2) that discharges to (5),
The module body (B) includes a first block (B1) including the mounting base (4), and a second block (B2) including the fuel take-out pipe (5) and a boss (5a) supporting the root thereof. , the pump holding part (7) is divided into a third block (B3) comprising, in the first block (B1), to form a support tube that protrudes from the upper surface of the mounting base (4) (4a) A boss extension (5b) extending axially downward from the boss (5a) is fitted to the inner periphery of the support cylinder (4a) , and an annular first joint formed at the upper end of the support cylinder (4a). An annular third joint formed by welding the surface (P1) and the annular second joining surface (P2) formed on the second block (B2) to each other and at the lower end of the boss extension (5b). a surface (P3), formed in the third block (B3) rings Fourth welded a bonding surface (P4) to each other, further welded the first and third blocks (B1, B3) to each other, the boss extension part (5b) and the third block (B3) is, It said first and second through holes (45, 46) is provided respectively Rutotomoni of a fuel passage (40), its Ryotsuana a (45, 46), said third and fourth joint surface (P3, P4 ) A fuel supply module, wherein the fuel supply modules are in direct communication with each other on the inner side of the annular welded portions . The fuel supply module according to claim 1, wherein
The fuel supply module, wherein the third and fourth joint surfaces (P3, P4) are arranged closer to the inside of the fuel tank (T) than the support tube (4a). The fuel supply module according to claim 2, wherein
A relief (42) is provided on the lower surface of the first block (B1) to open the periphery of the third and fourth joint surfaces (P3, P4) to the internal space of the fuel tank (T). A fuel supply module. The fuel supply module according to any one of claims 1 to 3,
The third and fourth joint surfaces (P3, P4) and the joint surfaces (P5, P6) to which the first and third blocks (B1, B3) are welded are arranged on the same plane. Fuel supply module.

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