JP2006022698A - Fuel pump module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a construction allowing easier manufacture and assembly in a fuel pump module. <P>SOLUTION: A jet pump nozzle module 8 is constructed separately from a main body 3a of a suspended part and includes jet pump nozzles 21, 26. The jet pump nozzle module 8 is mounted on a bottom of the suspended part and a tube 9 for transferring fuel from a subtank to the jet pump nozzle module 8 is constructed to be detachable. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel pump module.

  Conventionally, various fuel pump modules have been proposed. Patent Document 1 discloses a fuel pump module as an example.

The fuel pump module of the above publication is provided in a so-called vertical fuel tank having a main tank and a sub tank, and transfers fuel by using a fuel pump, a regulator, and a pressure drop when fuel is ejected. A jet pump nozzle is provided. The fuel pump module is provided with a plurality of jet pump nozzles, one of which is attached to the upper part of the side surface of the fuel pump module and transfers fuel from the sub tank to the main tank. A tube for introducing fuel from the sub tank to the negative pressure chamber is attached to the jet pump nozzle.
JP 2003-113751 A

  In the conventional fuel pump module, fuel can be efficiently transferred by the jet pump nozzle.

  However, in the conventional fuel pump module, since the tube is attached to the jet pump nozzle disposed at the upper part of the side surface of the fuel pump module, the fuel pump module is connected to the fuel pump module with the tube extending from the side surface of the fuel pump module. A complicated mounting operation of inserting into the tank is required, which is a cause of an increase in manufacturing cost.

  Further, the fuel pump module is provided with various components such as a fuel pump, a regulator, and a filter, and forms a passage for supplying fuel for jetting toward a jet pump nozzle disposed on the upper side of the fuel pump module. This is actually difficult, takes time for manufacturing, and increases manufacturing costs.

  The present invention has been made in view of the above circumstances, and an object thereof is to obtain a structure that can be more easily manufactured and assembled in a fuel pump module.

  In order to achieve the above object, the invention of claim 1 includes a fuel pump provided in a fuel tank, and a jet pump nozzle for transferring fuel by utilizing a pressure drop caused by jetting the fuel. In the fuel pump module, the jet pump nozzle configured separately from the main body of the fuel pump module is attached to the bottom of the fuel pump module.

  According to a second aspect of the present invention, in the first aspect of the present invention, the jet pump nozzle transfers fuel from the sub tank to the main tank, and a tube for introducing fuel from the sub tank to the jet pump negative pressure chamber is provided. Detachable configuration.

  According to a third aspect of the present invention, in the first aspect of the present invention, the jet pump nozzle for transferring fuel from the sub tank to the main tank, and a second jet pump for introducing the fuel in the main tank into the fuel pump module. A jet pump nozzle module integrated with the nozzle is attached to the bottom of the fuel pump module.

  According to the first aspect of the present invention, since the jet pump nozzle configured separately from the main body of the fuel pump module is attached to the bottom of the fuel pump module, the fuel passage to the jet pump nozzle is more easily provided in the fuel pump module. The jet pump nozzle can be easily attached to the fuel pump module. Therefore, the labor of manufacture can be reduced and manufacturing cost can be reduced.

  According to the second aspect of the present invention, since the tube is detachable from the jet pump nozzle attached to the bottom, the operation of inserting the fuel pump module into the fuel tank can be performed more easily. Therefore, the manufacturing effort can be reduced and the manufacturing cost can be reduced.

  According to the invention of claim 3, since the jet pump nozzle module is configured by integrating the two jet pump nozzles, it is possible to reduce the labor of manufacturing compared to the case where these are separately mounted, and the manufacturing cost is reduced. Can be reduced.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments embodying the invention will be described with reference to the drawings. In this embodiment, a fuel pump module mounted in a fuel tank of an automobile equipped with an internal combustion engine is exemplified.

  1 is a side view showing a schematic configuration of a fuel pump module mounted in a fuel tank, FIG. 2 is a plan view showing a bottom surface of a drooping portion of the fuel pump module, and FIG. 3 is a jet pump attached to the drooping portion. It is sectional drawing (AA sectional drawing of FIG. 1) of a nozzle.

  The fuel pump module 1 according to the present embodiment includes a lid portion 2 and a hanging portion 3.

  As shown in FIG. 1, the lid portion 2 is attached to an opening 4 a provided on the upper surface of the fuel tank 4. On the upper surface, the pipe 5 for supplying fuel to the internal combustion engine and the inside of the fuel tank 4 are provided. The connector 6 for energizing the electrical component and the outside is exposed.

  On the other hand, the drooping portion 3 is guided by a guide portion (not shown) provided on the lid portion 2 so as to be movable up and down, and biasing means (for example, a spring or the like) interposed between the lid portion 2 and the drooping portion 3 is illustrated. 2) against the bottom surface 4b of the fuel tank 4. In the present embodiment, main components of the fuel pump module 1 are mounted on the hanging portion 3. The constituent elements include a fuel pump that discharges fuel stored in the fuel tank 4 toward the outside of the fuel tank 4, a regulator that adjusts the discharge pressure of the fuel pump, and a filter that filters the fuel discharged from the fuel pump. There are a suction filter for filtering the fuel sucked into the fuel pump (none of them is shown), a jet pump nozzle module 8 and the like. A fuel storage part (not shown) for storing fuel is formed inside the drooping part 3, and the fuel pump sucks the fuel in the fuel storage part through the suction filter. In other words, the drooping portion 3 corresponds to a reservoir that stores fuel sucked into the fuel pump in the fuel tank 4. The lid 3 and the main body 3a of the hanging part 3 are made of an insulating resin.

  The fuel tank 4 includes a main tank 4A and a sub tank 4B, and is configured as a so-called vertical tank that straddles a floor tunnel portion or the like under the vehicle body floor. The fuel pump module 1 is disposed in the main tank 4A. . The fuel 7A in the main tank 4A is introduced into the fuel storage part in the drooping part 3 by the jet pump nozzle 26 (FIG. 3) in the jet pump nozzle module 8, and the fuel 7B in the sub tank 4B is supplied from the tube 9 and the jet pump. It is also introduced into the fuel storage part in the drooping part 3 via the jet pump nozzle 21 (FIG. 3) in the nozzle module 8.

  As shown in FIG. 2, on the bottom surface of the drooping portion 3, a partition wall 12 having a constant thickness and height is formed on the entire periphery thereof, and a recess 10 is formed surrounded by the partition wall 12. . The partition body 12 is formed with notches 13 at a constant pitch, and the notches 13 communicate the recess 10 with the bottom of the fuel tank 4 (main tank 4A). Further, a fuel introduction port 11 is formed on the upper surface of the recess 10, and fuel is introduced from the recess 10 through the fuel introduction port 11 to the fuel storage portion in the hanging portion 3. Here, as described above, since the drooping portion 3 is urged downward by the urging means and presses the bottom surface 4 b of the fuel tank 4, the bottom portion of the drooping portion 3 is the lowest point in the fuel tank 4. It has become. Therefore, by forming the concave portion 10 on the bottom surface of the drooping portion 3, when the remaining amount of fuel in the fuel tank 4 is small, the fuel that collects at the bottom of the fuel pump module 1 as the lowest point is more reliably obtained. The effect that it can introduce | transducing is acquired. Further, in this embodiment, a convex portion 14 is provided that protrudes downward from the upper surface of the concave portion 10, and the liquid level height of the fuel in the concave portion 10 is ensured by the volume of the convex portion 14, and particularly the remaining amount. When the amount of fuel is small, the fuel is more easily introduced. Further, the partition body 12 having the notch 13 functions as a filter for trapping dust larger than the width or height of the notch 13, so that the fuel in the fuel storage part in the recess 10 and thus in the drooping part 3 is more concentrated. There is an effect that it is maintained in a clean state.

  In addition, a shelf 30 that is substantially half-moon shaped in a plan view (FIG. 2) is formed on the bottom of the drooping portion 3 so as to cut out a corner portion of a substantially circular peripheral edge over a predetermined section. The jet pump nozzle module 8 is accommodated in the space formed by the shelf 30. In the present embodiment, as shown in FIG. 3, two circular holes 17 and 18 are formed in the side wall 31 of the shelf 30, and the projecting portion 15 of the jet pump nozzle module 8 is formed in these circular holes 17 and 18. , 16 are fitted in, the jet pump nozzle module 8 is mounted on the main body 3a of the hanging part 3. In the present embodiment, the jet pump nozzle module 8 is arranged so that its longitudinal direction is parallel to the bottom surface of the drooping portion 3 (that is, parallel to the bottom surface of the main tank 4A), and one end portion extending in the longitudinal direction. The tube 9 is fitted in (the left end portion in FIGS. 2 and 3), so that the tube 9 extends along the bottom surface of the main tank 4A in the vicinity of the bottom periphery of the drooping portion 3 as shown in FIG. It is.

  Here, as described above, the jet pump nozzle module 8 includes the jet pump nozzle 21 that introduces the fuel 7B in the sub tank 4B into the fuel storage section in the drooping portion 3, and the fuel 7A in the main tank 4A that droops. 3 and a jet pump nozzle 26 to be introduced into the fuel storage section in the interior 3.

  Specifically, as shown in FIG. 3, a hole 19 extending in the vertical direction and communicating with the regulator is provided on the bottom surface of the drooping portion 3, and the fuel discharged from the regulator is fueled through the hole 19. From a jet port 22 introduced into a jet pump nozzle 21 via a passage 20 and disposed in a tapered taper-shaped fuel passage (negative pressure chamber) 25 toward a fuel passage 23 at the back thereof. Erupted. Here, the fuel passage (negative pressure chamber) 25 communicates with the fuel passage 24 on the opposite side across the fuel passage 20 via a fuel passage (not shown) formed in an annular shape. The fuel passage 24 communicates with the inside of the tube 9. Accordingly, when a pressure drop occurs in the fuel passage (negative pressure chamber) 25 due to the ejection of fuel from the ejection port 22, the fuel in the sub tank 4B passes through the tube 9, the fuel passage 24, and the annular fuel passage. And introduced into the fuel passage 23.

  The fuel introduced into the fuel passage 23, that is, the fuel discharged from the regulator and the fuel transferred from the sub tank 4B are introduced into another jet pump nozzle 26 and arranged in the fuel introduction port 11. From the jet outlet 28, the fuel is ejected toward the tapered tapered fuel passage 27. Here, as described above, the fuel introduction port 11 communicates with the recess 10 formed in the bottom of the drooping portion 3, while the fuel passage 27 communicates with the fuel storage portion in the drooping portion 3. Therefore, when a pressure drop occurs in the fuel passage 27 due to the ejection of fuel from the ejection port 28, the fuel in the main tank 4A is introduced into the fuel passage 27 from the recess 10 via the fuel introduction port 11, and the drooping portion. 3 is introduced into the fuel storage section.

  In this way, the fuel 7A, 7B in the main tank 4A and the sub tank 4B is transferred to the fuel introduction part in the hanging part 3 by the two jet pump nozzles 21, 26 built in the jet pump nozzle module 8. .

  As described above, according to this embodiment, since the jet pump nozzle module 8 including the jet pump nozzles 21 and 26 configured separately from the main body 3a of the hanging part 3 is attached to the bottom of the hanging part 3, Compared with the case where the jet pump nozzle is disposed above the drooping portion 3, the fuel passage to the jet pump nozzles 21 and 26 can be more easily formed, and the jet pump nozzle module is formed in the main body 3 a of the drooping portion 3. 8 can be attached easily. Therefore, the labor of manufacture can be reduced and manufacturing cost can be reduced.

  Further, according to the present embodiment, the tube 9 can be attached to and detached from the jet pump nozzle module 8 attached to the bottom, and the tube 9 is disposed at the bottom of the fuel pump module 1. Therefore, the tube 9 can be inserted first into the fuel tank 4 from the opening 4a, and then the fuel pump module 1 can be easily inserted. Therefore, the manufacturing effort can be reduced and the manufacturing cost can be reduced. Furthermore, in this embodiment, the tube 9 is attached to the jet pump nozzle module 8 so as to extend along the bottom of the drooping portion 3. Therefore, the force acting on the jet pump nozzle module 8 and its attachment to the main body 3a by the elastic force accompanying the bending of the tube 9 can be reduced.

  In addition, according to the present embodiment, since the jet pump nozzle module 8 is configured by integrating the two jet pump nozzles 21 and 26, it is possible to reduce the manufacturing effort compared to the case where these are separately mounted. The manufacturing cost can be reduced.

  Further, according to the present embodiment, the jet pump nozzle module 8 can be easily attached after the main body 3a of the hanging portion 3 is assembled, and the jet pump nozzle module 8 having different specifications according to the specifications such as the fuel flow rate can be provided. There is also an advantage that the main body 3a of the hanging part 3 can be shared and the labor and cost of manufacturing can be reduced.

  Furthermore, in the present embodiment, in the jet pump nozzle module 8, the extending direction of the fuel passages 23 and 24 and the direction in which the fuel is ejected from the jet pump nozzle 21 are parallel to the side wall 31 of the shelf 30. 20 and the extending direction of the fuel passage 27 and the direction in which the fuel is ejected from the jet pump nozzle 26 are perpendicular to the side wall 31. By doing so, the jet pump nozzle module 8 can be efficiently arranged in the space around the bottom of the drooping portion 3 formed by the shelf 30 so that the longitudinal direction thereof follows the side wall 31. The protrusions 15 and 16 extending perpendicularly to the fuel pipe and the hanging part 3 can be used as attachment parts.

  (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a side view showing the main configuration of the bottom of the fuel pump module according to the present embodiment. The fuel pump module 1A according to the present embodiment includes the same components as the fuel pump module 1 according to the first embodiment. Therefore, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  The fuel pump module 1A according to the present embodiment is provided with a jet pump nozzle module 8A instead of the jet pump nozzle module 8 of the first embodiment. The jet pump nozzle module 8A includes only a jet pump nozzle 21A that introduces the fuel 7B in the sub tank 4B into the main tank 4A, and the jet that introduces the fuel 7A in the main tank 4A into the fuel storage section in the drooping portion 3. The pump nozzle 26 is not provided. Therefore, in this embodiment, a jet pump nozzle (not shown) that introduces the fuel 7A in the main tank 4A into the fuel storage part in the drooping part 3 is separately provided at the bottom of the drooping part 3, for example, facing the recess 10. Provided. The internal configuration of the jet pump nozzle module 8A is the same as that in the jet pump nozzle module 8 of the first embodiment shown in FIG. 3 from the middle of the fuel passage 23 (ie, the protrusion 16 and the jet pump nozzle 26). Should be removed.

  Also in this embodiment, since the jet pump nozzle module 8A is attached to the bottom of the drooping portion 3, it is easy to form a fuel passage to the jet pump nozzle module 8A in the main body 3a of the drooping portion 3. Since the tube 9 is attached to the bottom of the drooping portion 3, there is an advantage that the fuel pump module 1 </ b> A can be easily inserted into the fuel tank 4.

  The present invention can be embodied in another embodiment as follows. That is, in the said embodiment, the shelf part 30 which becomes a substantially half moon shape by planar view is formed so that the corner | angular part of a substantially circular periphery may be notched over a predetermined area, and the droop formed by this shelf part 30 Although the jet pump nozzle module 8 is accommodated in the space at the bottom periphery of the portion 3, the jet pump nozzle module 8 may be directly attached to the bottom periphery of the drooping portion 3 without forming the shelf 30. Also in this embodiment, the same operation and effect as the above embodiment can be obtained.

  Further, technical ideas other than the claims that can be grasped from the above embodiment will be described together with the effects thereof.

  (A) In the fuel pump module according to claims 1 to 3, it is preferable that the tube is attached to the jet pump nozzle module so that the tube extends along the bottom of the hanging part.

  If it carries out like this, the curvature of a tube will be reduced in the drooping vicinity, and the force which acts on a jet pump nozzle module and its attaching part with the elastic force accompanying bending of a tube can be reduced.

The external view (side view) in the state with which the fuel pump module concerning the embodiment of this invention was mounted | worn with the fuel tank. The top view which shows the bottom part of the fuel pump module concerning 1st Embodiment of this invention. Sectional drawing (AA sectional drawing of FIG. 1) of the jet pump nozzle module contained in the fuel pump module concerning 1st Embodiment of this invention, and its attachment part. The side view of the fuel pump module concerning 2nd Embodiment of this invention.

Explanation of symbols

1,1A Fuel pump module 3a body (fuel pump module body)
4 Fuel tank 4A Main tank 4B Sub tank 7A, 7B Fuel 8 Jet pump nozzle module 9 Tube 10 Recess 21, 21A Jet pump nozzle 26 Jet pump nozzle (second jet pump nozzle)

Claims (3)

A fuel pump that is provided in the fuel tank and discharges the fuel stored in the fuel tank toward the outside of the fuel tank; and a jet pump nozzle that transfers the fuel by using a pressure drop caused by jetting the fuel; A fuel pump module comprising:
A fuel pump module, wherein a jet pump nozzle configured separately from a main body of the fuel pump module is attached to the bottom of the fuel pump module. The fuel tank has a main tank into which the fuel pump module is inserted, and a sub tank different from the main tank,
2. The fuel according to claim 1, wherein the jet pump nozzle is configured to transfer fuel from the sub tank to the main tank, and is configured to be detachable from a tube for introducing fuel from the sub tank to the jet pump negative pressure chamber. Pump module. A jet pump nozzle module in which a jet pump nozzle that transfers fuel from the sub tank to the main tank and a second jet pump nozzle that introduces fuel in the main tank into the fuel pump module is integrated with the bottom of the fuel pump module. The fuel pump module according to claim 1, wherein the fuel pump module is attached to the fuel pump module.

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