JP5691771B2 - Pump control module - Google Patents

Description

  The present invention relates to a pump control module that controls a fuel pump that supplies fuel to an internal combustion engine (hereinafter referred to as an “engine”).

  In recent years, with the trend related to fuel consumption regulations, in order to reduce electric power consumed by vehicles and the like, electric fuel pumps that consume a large amount of electric power have been reduced in power. For example, in the in-tank fuel pump disclosed in Patent Document 1, a fuel pump controller (hereinafter referred to as “FPC”) is used to control the voltage applied to the fuel pump in accordance with the fuel flow rate required by the engine. The power consumption of the fuel pump is reduced.

  In the in-tank fuel pump of Patent Document 1, an FPC unit (pump control unit) is provided on a flange (lid member) that closes the opening of the fuel tank, and is connected to the fuel pump in the fuel tank. Thus, by arranging the FPC unit near the fuel pump, noise generated from the wiring connecting the FPC unit and the fuel pump is reduced. In addition, by providing the FPC unit outside the fuel tank, the fuel in the fuel tank is prevented from entering the FPC unit.

Japanese Patent No. 4178354

  By the way, in the in-tank type fuel pump of patent document 1, the FPC unit and the flange are integrally formed by molding only the metal terminal portion of the FPC unit with a flange made of an insulating resin material. In this configuration, when the resin flange is deformed due to thermal expansion or fuel swelling, a stress may be generated due to a difference in expansion between the resin and the metal, which may cause a problem that the joint portion of the metal terminal is broken.

  In order to solve this problem, it is conceivable to mold most of the FPC unit with a resin flange. However, for example, if the FPC unit is molded with a resin flange so that it surrounds the entire circumference without interruption, the FPC unit is deformed so that the FPC unit is tightened by shrinking the flange after molding. Residual stress in the tensile direction may be generated at the contact point. In particular, a large residual stress may be generated in a portion of the flange that contacts the corner of the FPC unit. Here, when the molding shrinkage rate of the resin material forming the flange is large, there is a concern that excessive residual stress is generated in the flange.

  Also, if the FPC unit is less likely to cause thermal expansion or contraction or fuel swelling, and the resin-made flange that molds the periphery of the FPC unit is likely to cause thermal expansion or thermal shrinkage or fuel swelling, the ambient temperature change or the inside of the fuel tank The flange may be deformed by the influence of the fuel and excessive stress may be generated in the flange. In particular, when the flange is thermally contracted due to a change in ambient temperature, an excessive tensile stress may occur in the flange. In general, since the tensile strength of a resin material is significantly lower than the compressive strength, if a tensile stress is generated particularly on a resin flange that molds the periphery of the FPC unit, there is a possibility that the flange may crack or break.

  This invention is made | formed in view of the above-mentioned problem, The objective is to provide the pump control module which can suppress that a crack and a crack arise in a member.

  The invention described in claim 1 is a pump control module for controlling a fuel pump disposed in a fuel tank, and includes a pump control unit and a lid member. The pump control unit has a control circuit that controls electric power supplied to the fuel pump, and a circuit case that houses the control circuit. The lid member is a plate-like lid member main body that closes the opening of the fuel tank, and a plate-like lid member wall that is formed so as to extend substantially perpendicularly from the lid member main body so that one surface contacts the outer wall of the circuit case. Has a part. The lid member is integrally formed with the pump control unit by resin. That is, the pump control unit and the lid member are integrally formed by molding. In the present invention, the lid member wall portion is formed so as to abut on the outer wall of the circuit case in a predetermined range of the entire circumferential range of the circuit case.

  As described above, the lid member wall portion does not surround the entire circumference of the circuit case without interruption, but surrounds a part of the circumference of the circuit case. That is, a gap is formed between circumferential ends of the circuit case of the lid member wall. In this configuration, when the lid member (lid member wall portion) is subjected to molding shrinkage or heat shrinkage, tensile stress that can be generated on the lid member wall portion can be reduced. Further, when the lid member (lid member wall) is thermally expanded or fuel swells, stress may be generated on the lid member wall, but the stress can be reduced by the gap.

  In the present invention, since the lid member wall portion surrounds a part of the periphery of the circuit case, the impact is applied to the circuit case (pump control unit) by blocking the external impact by the lid member wall portion. Can be suppressed. That is, the pump control unit can be protected from impact by the lid member wall. Furthermore, since the lid member wall portion is formed so as to contact the outer wall of the circuit case, the pump control unit can be prevented from being displaced in the surface direction of the lid member body with respect to the lid member.

  In this way, in the present invention, in the configuration in which the pump control unit and the lid member are molded, the lid member wall portion protects the pump control unit from impact and while suppressing the displacement of the pump control unit with respect to the lid member, The stress that can occur in the lid member (lid member wall) can be reduced. Therefore, it can suppress that a crack and a crack arise in especially a cover member wall part of a cover member. In this configuration, for example, when the molding shrinkage rate, thermal expansion rate, or fuel swelling rate of the lid member is larger than that of the circuit case, the above-mentioned effect of “reducing tensile stress that can be generated on the lid member wall” becomes higher. .

  In the invention described in claim 2, a plurality of lid member wall portions are formed at predetermined intervals in the circumferential direction of the circuit case. In this configuration, a gap is formed between adjacent lid member wall portions. Therefore, even if the lid member wall portion is molded shrinkage, thermal shrinkage, thermal expansion, or fuel swelling, it is possible to suppress the occurrence of excessive stress on the lid member wall portion. Further, by forming a plurality of lid member wall portions, the above-described effects of “protecting the pump control unit from impact” and “suppressing displacement of the pump control unit relative to the lid member” can be further enhanced. .

  In the invention according to claim 3, the lid member has a molding shrinkage rate, a thermal expansion rate or a fuel swelling rate larger than that of the circuit case. Thereby, the above-mentioned effect of “reducing tensile stress that can occur in the lid member wall” can be further enhanced.

In the invention according to claim 4, one of the circuit case and the lid member has a recess formed to be recessed toward the opposite side to the other. The other of the circuit case and the lid member has a filling convex portion formed so as to protrude to one side by being filled in the concave portion.
For example, when the concave portion is formed in the circuit case and the filling convex portion is formed on the lid member, when the lid member is subjected to molding shrinkage or heat shrinkage, tensile stress is hardly generated in the filling convex portion of the lid member. Further, in this configuration, when the lid member is thermally expanded or fuel swells, the filling convex portion of the lid member is hardly subjected to tensile stress although compressive stress is generated in the concave portion. Thus, in the present invention, in the configuration in which the pump control unit and the lid member are molded, it is possible to reduce the tensile stress that can occur on the filling convex portion of the lid member. Therefore, it can suppress that a crack and a crack arise in a cover member. In this configuration, for example, when the molding shrinkage rate, thermal expansion rate, or fuel swelling rate of the lid member is larger than that of the circuit case, the above-mentioned effect of “reducing tensile stress that can occur on the filling convex portion of the lid member” is more effective. Get higher.

  Further, for example, when the concave portion is formed on the lid member and the filling convex portion is formed on the circuit case, when the circuit case is subjected to molding shrinkage or heat shrinkage, the filling convex portion of the circuit case is unlikely to generate tensile stress. . Further, with this configuration, when the circuit case is thermally expanded or the fuel is swollen, the filling convex portion of the circuit case generates a compressive stress in the concave portion but hardly generates a tensile stress. Thus, in the present invention, the tensile stress that can be generated on the filling convex portion of the circuit case can be reduced in the configuration in which the pump control unit and the lid member are molded. Therefore, it can suppress that a crack and a crack arise in a circuit case. In this configuration, for example, when the molding shrinkage rate, thermal expansion rate, or fuel swelling rate of the circuit case is larger than that of the lid member, the above-described effect of “reducing tensile stress that can be generated on the filling protrusion of the circuit case” is more effective. Get higher.

In the fifth aspect of the present invention, the filling convex portion is formed on the “surface contacting the circuit case” of the lid member wall portion. The recess is formed in the “surface that contacts the lid member wall” of the circuit case. In this configuration, even if the lid member is subjected to molding shrinkage, thermal shrinkage, thermal expansion, or fuel swelling, tensile stress is hardly generated on the filling convex portion formed on the lid member wall. Therefore, it is possible to reduce the tensile stress that can occur in the filling convex portion of the lid member wall portion, and to suppress the occurrence of cracks and cracks in the lid member wall portion.
In the invention described in claim 6, the pump control unit is provided on the opposite side of the lid member body from the fuel pump. The filling convex portion is formed on the “surface opposite to the fuel pump” of the lid member main body. The recess is formed on a predetermined surface of the circuit case facing the “surface opposite to the fuel pump” of the lid member main body. In this configuration, even if the lid member main body is subjected to molding shrinkage, heat shrinkage, thermal expansion, or fuel swelling, tensile stress is hardly generated on the filling convex portion formed on the lid member main body. Therefore, the tensile stress that can occur in the lid member body can be reduced, and cracks and cracks can be prevented from occurring in the lid member body.

In the invention according to claim 7 , the lid member has a rib formed between the “surface opposite to the surface contacting the circuit case” of the lid member wall and the lid member main body. Thereby, the base part of the plate-like lid member wall portion can be reinforced, and the above-mentioned effects of “protecting the pump control unit from impact” and the effect of “suppressing displacement of the pump control unit with respect to the lid member” Can be further enhanced.

The inventions according to claims 8 and 9 more specifically illustrate the configuration of the above-described invention.
In the invention according to claim 8 , the circuit case is formed in a substantially rectangular parallelepiped shape. The lid member wall portion is provided so as to contact the four side surfaces of the circuit case. In this configuration, although the lid member wall portion is in contact with the four side surfaces of the circuit case, a gap is formed between the end portions of the lid member wall portion in the circumferential direction of the circuit case. Therefore, even if the lid member wall portion is molded shrinkage, thermal shrinkage, thermal expansion, or fuel swelling, it is possible to suppress the occurrence of excessive stress on the lid member wall portion.

In the invention according to claim 9 , the circuit case is formed in a substantially rectangular parallelepiped shape. The lid member wall portion is formed to abut against three of the four side surfaces of the circuit case. The lid member has a connector portion formed so as to extend substantially vertically from the lid member body at a position away from a side surface where the lid member wall portion is not in contact with the four side surfaces of the circuit case. ing. The connector portion is used for connecting a wire harness for the purpose of power supply and signal communication to the pump control unit and the fuel pump, for example.

In this configuration, the lid member wall portion is in contact with three of the four side surfaces of the circuit case, but is not in contact with the remaining one side surface. Therefore, even if the lid member wall portion is molded shrinkage, thermal shrinkage, thermal expansion, or fuel swelling, it is possible to suppress the occurrence of excessive stress on the lid member wall portion.
Further, by enclosing three of the four side surfaces of the circuit case with a lid member wall portion and forming a connector portion at a predetermined distance from the remaining one side surface, it is possible to prevent an impact from four directions around the circuit case. The pump control unit can be protected.

The invention described in claim 10 more specifically illustrates the configuration of the invention described in claim 8 or 9 . In the invention described in claim 10 , a plurality of lid member wall portions are formed so as to correspond to the respective side surfaces of the circuit case. The gap formed between the adjacent lid member wall portions is located at a corner formed by the adjacent side surfaces of the circuit case. Here, if the lid member wall portion is formed so as to cover the corner portion of the circuit case, the lid member wall portion covers the corner portion of the circuit case, such as when the lid member undergoes molding shrinkage or heat shrinkage. May cause a large tensile stress. On the other hand, in the present invention, since the lid member wall portion does not contact the corner portion of the circuit case, it is possible to suppress the occurrence of large stress on the lid member wall portion.

  The invention described in claim 10 more specifically exemplifies the configuration of the invention described in claims 4-9. In a tenth aspect of the present invention, the pump control unit is provided on the opposite side of the lid member body from the fuel pump. The filling convex portion is formed on the “surface opposite to the fuel pump” of the lid member main body. The recess is formed on a predetermined surface of the circuit case facing the “surface opposite to the fuel pump” of the lid member main body. In this configuration, even if the lid member main body is subjected to molding shrinkage, heat shrinkage, thermal expansion, or fuel swelling, tensile stress is hardly generated on the filling convex portion formed on the lid member main body. Therefore, the tensile stress that can occur in the lid member body can be reduced, and cracks and cracks can be prevented from occurring in the lid member body.

The figure which shows the fuel supply apparatus to which the pump control module by one Embodiment of this invention is applied. 1 is a schematic diagram showing a fuel supply apparatus to which a pump control module according to an embodiment of the present invention is applied, and a fuel supply system using the same. (A) is a perspective view showing a pump control module according to one embodiment of the present invention, (B) is a plan view showing a pump control unit of the pump control module according to one embodiment of the present invention, (C) is (B) CC sectional view, (D) is a perspective view which shows the pump control unit of the pump control module by one Embodiment of this invention. (A) is a front view which shows the pump control module by one Embodiment of this invention, (B) is the IV-IV sectional view taken on the line of FIG. 5 (A). (A) is the figure which looked at FIG. 4 (A) from the arrow X direction, (B) is the VV sectional view taken on the line of FIG. 4 (A). (A) is a perspective view showing a pump control module according to a comparative example, (B) is a perspective view showing a state during the manufacture of a pump control unit of the pump control module according to the comparative example, and (C) is a perspective view of the pump control module according to the comparative example. The perspective view which shows a pump control unit. (A) is sectional drawing which shows the pump control module by a comparative example, (B) is the figure which looked at (A) from the arrow B direction. The figure for demonstrating the effective combination example of the material of the cover member of the pump control module of this invention, and the material of a circuit case.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(One embodiment)
FIG. 1 shows a pump control module according to an embodiment of the present invention and a fuel supply device using the same. The fuel supply device 1 is installed in a fuel tank 2 of a vehicle, for example, and supplies fuel in the fuel tank 2 to an engine 6 outside the fuel tank 2 via a fuel pipe 3, a fuel rail 4, and an injector 5 ( (See FIG. 2). The fuel supply device 1 includes a reservoir cup 10, a pump module 11, a pump control module 20, and the like. That is, the pump control module 20 according to the present embodiment constitutes a part of the fuel supply device 1.

  The reservoir cup 10 is formed in a bottomed cylindrical shape with, for example, resin. The reservoir cup 10 is installed inside the fuel tank 2 so that the bottom part comes into contact with the inner wall of the bottom part of the fuel tank 2. An opening 101 for introducing the fuel in the fuel tank 2 into the reservoir cup 10 is formed near the bottom of the reservoir cup 10.

The pump module 11 is accommodated inside the reservoir cup 10. The pump module 11 includes a fuel pump 12, a suction filter 13, a fuel filter 14, and the like.
The fuel pump 12 contains an electric motor (not shown) inside, and boosts the fuel sucked through the suction filter 13 by a rotating member such as an impeller rotated by the electric motor. The suction filter 13 removes foreign matters in the fuel in the reservoir cup 10 sucked by the fuel pump 12. As described above, the fuel pump 12 is disposed in the fuel tank 2. That is, the fuel pump 12 is an in-tank electric fuel pump.

  The fuel filter 14 covers the outside of the diameter of one end of the fuel pump 12. The fuel filter 14 removes foreign matters contained in the fuel discharged from the fuel pump 12. The fuel discharged from the fuel pump 12 and passing through the fuel filter 14 is supplied to the engine 6 via the pipe 15, a pump control module 20 described later, the fuel pipe 3, the fuel rail 4 and the injector 5.

  A liquid level gauge 16 is attached to the outer wall of the reservoir cup 10. The liquid level gauge 16 has a float 17. The float 17 has buoyancy with respect to the fuel in the fuel tank 2. The level gauge 16 can transmit a signal according to the position of the float 17 in the fuel tank 2 to the outside via the lead wire 161. That is, the amount of fuel in the fuel tank 2 can be detected by the level gauge 16.

The pump control module 20 includes an FPC unit 30 as a pump control unit, a flange 40 as a lid member, and the like.
The flange 40 is integrally formed with the FPC unit 30 with resin, and is attached to the opening 9 formed on the upper side in the gravity direction of the fuel tank 2 (see FIG. 1). In the present embodiment, the FPC unit 30 is located on the opposite side of the fuel pump 12 with respect to the flange 40, that is, outside the fuel tank 2 in a state where the flange 40 is attached to the opening 9.

An electronic control unit (hereinafter referred to as “ECU”) 7 and a battery 8 are connected to the FPC unit 30 (see FIG. 2).
The ECU 7 includes a CPU that performs control processing and arithmetic processing, a storage device including memories such as a read-only memory (ROM) and a writable memory (RAM) for storing various programs and data, an input circuit, an output circuit, and a power source. It is a small computer consisting of circuits and the like. The ECU 7 operates according to various programs stored in the ROM. The ECU 7 controls the state of the vehicle in an integrated manner by controlling the operation of various devices of the vehicle based on information from various sensors attached to the vehicle.

  The FPC unit 30 controls electric power supplied to the fuel pump 12 based on a command from the ECU 7. The FPC unit 30 and the fuel pump 12 are connected by a lead wire 121. Thereby, the power of the battery 8 is controlled by the FPC unit 30 and supplied to the fuel pump 12 via the lead wire 121. The amount of fuel discharged from the fuel pump 12 varies depending on the power supplied to the fuel pump 12. That is, the ECU 7 and the FPC unit 30 can adjust the amount of fuel supplied to the engine 6 by controlling the power supplied to the fuel pump 12.

  As shown in FIG. 1, in this embodiment, a shaft 18 and a spring 19 are provided between the flange 40 and the reservoir cup 10. One end of the two shafts 18 is press-fitted into the flange 40 and the other end is loosely inserted into an insertion hole formed in the reservoir cup 10. The spring 19 is provided outside the diameter of the shaft 18, and one end is locked to the flange 40 and the other end is locked to the reservoir cup 10. Thereby, the flange 40 and the reservoir cup 10 can reciprocate relatively up and down in the gravity direction of the fuel tank 2. Therefore, even if the fuel tank 2 in which the fuel supply device 1 is accommodated expands or contracts due to a change in internal pressure due to a temperature change or a change in fuel amount, the bottom of the reservoir cup 10 is attached to the bottom inner wall of the fuel tank 2 by the spring 19. It will always be pressed.

Next, the pump control module 20 will be described in detail with reference to FIGS.
As shown in FIG. 3A, the pump control module 20 molds the FPC unit 30 (see FIGS. 3B to 3D) as a primary molded product with a resin flange 40 (secondary molding). It is formed by doing. That is, the pump control module 20 is integrally formed by molding the FPC unit 30 and the flange 40.

As shown in FIGS. 3B to 3D, the FPC unit 30 includes an FPC circuit 31 as a control circuit, a heat sink 32, an FPC case 33 as a circuit case, and the like.
The FPC circuit 31, for example, is an electronic component that functions as a DC-DC converter packaged with a sealing material such as an epoxy resin, and is formed in a rectangular plate shape. The FPC circuit 31 has six terminals 300 that are connected to the electronic component and exposed from the sealing material. Connector terminals 311, 312, 313, 314, 315 and 316 are welded to each of the six terminals 300. The terminal 300 and the connector terminals 311, 312, 313, 314, 315 and 316 are made of a metal such as copper, for example.

  The heat sink 32 is formed of a metal such as aluminum. The heat sink 32 includes a rectangular plate-shaped base portion 321 and a plurality of heat radiation fins 322 formed so as to extend substantially vertically from one surface of the base portion 321. The surface of the base portion 321 opposite to the heat radiation fin 322 is in contact with one surface of the FPC circuit 31. When the FPC circuit 31 is operated, an internal electronic circuit generates heat. In the present embodiment, the heat generated by the electronic component can be radiated by the heat sink 32 that contacts the FPC circuit 31.

  In this embodiment, the FPC case 33 is made of, for example, polyphenylene sulfide resin (PPS resin), and accommodates the FPC circuit 31 therein. More specifically, the FPC case 33 is formed so as to cover the opposite side of the FPC circuit 31 in contact with the heat sink 32 from the heat sink 32. That is, the FPC circuit 31, the terminal 300, the connector terminals 311, 312, 313, 314, 315, 316, the heat sink 32, and the FPC case 33 are integrally formed by molding to constitute the FPC unit 30.

  In the present embodiment, the FPC case 33 is formed in a substantially rectangular parallelepiped shape. Therefore, the FPC case 33 has an upper surface 331, a lower surface 332, and four side surfaces (a side surface 333, a side surface 334, a side surface 335, and a side surface 336) as outer walls. The heat sink 32 is located on the upper surface 331 side of the FPC case 33.

  As shown in FIG. 3C, a recess 341 is formed on the lower surface 332 of the FPC case 33 so as to be recessed toward the upper surface 331 side. The inner wall (CS1) of the FPC case 33 forming the end portion on the upper surface 331 side of the recess 341 is formed in a curved surface shape. A space (CS2) between the inner wall of the FPC case 33 that forms the recess 341 and the outer wall of the FPC case 33 that forms the lower surface 332 is formed in a curved surface.

Further, as shown in FIG. 3D, a concave portion 342 is formed on the side surface 333 of the FPC case 33 so as to be recessed toward the side surface 334 side. Further, a concave portion 343 is formed on the side surface 334 of the FPC case 33 so as to be recessed toward the side surface 333 (see FIG. 5B).
In the present embodiment, a part of the corner formed by the lower surface 332 and the side surface 333 (CS3), a part of the corner formed by the lower surface 332 and the side surface 334 (CS4), and the lower surface 332 A part of the corner (CS5) formed by the side surface 335 is formed in a curved surface (see FIGS. 3C, 3D, and 4B).

  Here, one end of the connector terminals 311, 312, 313, 314, 315 and 316, that is, a welded portion with the terminal 300 is covered with the FPC case 33. On the other hand, the other end is not covered with the FPC case 33. Note that the connector terminals 311, 312, 313, 314, 315, and 316 are provided so that a part thereof is located inside the recess 341 of the FPC case 33 (see FIG. 3C).

  The connector terminals 311, 312, 313, and 314 are bent toward the side surface 336 so as to be substantially parallel to the lower surface 332 at a predetermined distance from the lower surface 332 of the FPC case 33, and at a predetermined position beyond the side surface 336. It is formed so as to be bent toward the upper surface 331 side so as to be substantially parallel to the side surface 336. The connector terminals 315 and 316 are bent toward the side surface 336 so as to be substantially parallel to the lower surface 332 at a predetermined distance from the lower surface 332 of the FPC case 33, and further, substantially the same as the side surface 336 at a predetermined location beyond the side surface 336. It is formed so as to be bent on the side opposite to the upper surface 331 so as to be parallel.

As shown in FIGS. 4 and 5, the flange 40 includes a flange body 41 as a lid member body, a flange wall part 421 as a lid member wall part, a flange wall part 422, a flange wall part 423, and the like. Yes.
In the present embodiment, the flange 40 is formed of, for example, polyacetal resin (POM resin). The material made of polyacetal resin has a larger molding shrinkage rate, thermal expansion rate, and fuel swelling rate than materials made of polyphenylene sulfide resin. Therefore, in the present embodiment, the flange 40 has a molding shrinkage rate, a thermal expansion rate, and a fuel swelling rate that are larger than those of the FPC case 33 of the FPC unit 30.

  As shown in FIGS. 3A, 4 and 5, the flange main body 41 is formed in a substantially disc shape. The flange 40 is attached to the fuel tank 2 such that the flange body 41 closes the opening 9 of the fuel tank 2 (see FIG. 1). As a result, the fuel in the fuel tank 2 can be prevented from jumping out of the fuel tank 2 via the opening 9.

  The FPC unit 30 is provided such that the lower surface 332 contacts the surface 411 of the flange body 41 on the side opposite to the fuel pump 12. The flange main body 41 has a filling convex portion 431 formed so as to protrude to the FPC case 33 side by filling the concave portion 341 formed on the lower surface 332 of the FPC case 33 (FIG. 4B). (See FIG. 5B). That is, the filling convex portion 431 is formed so that the shape corresponds to the shape of the concave portion 341. In addition, the outer wall of the end portion on the upper surface 331 side of the filling convex portion 431 is formed in a curved surface shape corresponding to the shape of the inner wall (CS1) of the concave portion 341. Further, the outer wall of the end portion of the filling convex portion 431 on the “surface 411 side of the flange main body 41” is formed in a curved surface shape corresponding to the shape of the wall surface (CS2) that comes into contact (see FIG. 4B). Here, the flange main body 41 is molded so as to cover the connector terminals 311, 312, 313, 314, 315 and 316 except for both ends (see FIG. 4B).

  As shown in FIGS. 3A, 4, and 5, the flange wall portion 421, the flange wall portion 422, and the flange wall portion 423 are all plate-like so as to extend substantially perpendicularly from the surface 411 of the flange main body 41. Is formed. The flange wall portion 421 is formed so that one surface abuts on the side surface 333 of the FPC case 33. The flange wall portion 422 is formed so that one surface is in contact with the side surface 334 of the FPC case 33. The flange wall portion 423 is formed such that one surface abuts on the side surface 335 of the FPC case 33.

  As shown in FIG. 5, the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 are formed at predetermined intervals in the circumferential direction of the FPC case 33. In this configuration, a gap CL1 is formed between adjacent flange wall portions (between the flange wall portion 421 and the flange wall portion 423 and between the flange wall portion 422 and the flange wall portion 423). The clearance CL <b> 1 is located at a corner 337 formed by the side surface 333 and the side surface 335 of the FPC case 33 and a corner 338 formed by the side surface 334 and the side surface 335.

As shown in FIG. 5B, the flange wall portion 421 has a filling convex portion 432 formed so as to protrude toward the FPC case 33 by being filled in the concave portion 342 formed on the side surface 333 of the FPC case 33. Have. Further, the flange wall portion 422 has a filling convex portion 433 formed so as to protrude toward the FPC case 33 by being filled in the concave portion 343 formed on the side surface 333 of the FPC case 33.
In the present embodiment, the shape of the abutting FPC case 33 between the “surface that abuts on the FPC case 33” of the flange wall portion 421, the flange wall portion 422, and the flange wall portion 423 and the surface 411 of the flange body 41. Corresponding to (CS3, CS4, CS5), it is formed in a curved surface shape (see FIG. 4B).

As shown in FIGS. 4 and 5, the flange 40 includes a flange wall portion 421, a flange wall portion 422, and a flange wall portion 423, which is a “surface opposite to the surface contacting the FPC case 33” and the flange body 41. It has ribs 44 formed between them. In this embodiment, a plurality of ribs 44 are formed.
Further, the flange 40 has a first upper connector 451 formed so as to extend substantially perpendicularly from the surface 411 of the flange main body 41 at a position separated from the side surface 336 of the FPC case 33 by a predetermined distance. The first upper connector 451 is formed in a cylindrical shape. The connector terminals 311, 312, 313, and 314 are exposed in the space inside the first upper connector 451 at the end opposite to the terminal 300. Here, the first upper connector 451 corresponds to a “connector portion” in the claims.

  An end portion of a wire harness connected to the ECU 7 and the battery 8 is inserted into the first upper connector 451. As a result, the ECU 7 and the connector terminals 311 and 312 are connected. Further, the battery 8 and the connector terminals 313 and 314 are connected.

  The flange 40 has a first lower connector 452 formed so as to extend from the surface 412 of the flange main body 41 on the fuel pump 12 side substantially vertically. The end portions of the connector terminals 315 and 316 opposite to the terminal 300 are exposed in the space inside the first lower connector 452. Connector terminals 315 and 316 and fuel pump 12 are connected by lead wire 121.

In the present embodiment, the connector terminal 311 is used to transmit a control signal from the ECU 7 to the FPC unit 30. The connector terminal 312 is used to transmit a signal (diagnostic signal) related to the failure of the FPC unit 30 from the FPC unit 30 to the ECU 7.
The electric power from the battery 8 flows to the FPC circuit 31 via the wire harness and the connector terminal 313 or 314, is controlled by the FPC circuit 31, and is supplied to the fuel pump 12 via the connector terminal 315 or 316 and the lead wire 121. Is done.

  The flange 40 has a cylindrical discharge port 46 formed so as to penetrate the flange main body 41 in the plate thickness direction. The end portion 461 of the discharge port 46 on the fuel pump 12 side is connected to the end portion of the pipe 15 on the side opposite to the fuel pump 12. An end portion 462 of the discharge port 46 opposite to the fuel pump 12 is connected to an end portion of the fuel pipe 3 opposite to the fuel rail 4.

  Further, the flange 40 has a cylindrical second connector 47 formed so as to penetrate the flange main body 41 in the plate thickness direction. The end of the second connector 47 on the fuel pump 12 side is inserted into the end of the lead wire 161 opposite to the liquid level gauge 16. The end of the wire harness connected to the ECU 7 is inserted into the end 472 of the second connector 47 opposite to the fuel pump 12. With this configuration, the level gauge 16 and the ECU 7 are connected via the lead wire 161, the terminal provided inside the second connector 47, and the wire harness. Thus, the ECU 7 can detect the amount of fuel in the fuel tank 2 based on the signal transmitted from the liquid level gauge 16.

  As described above, the pump control module 20 in which the FPC unit 30 and the flange 40 are integrated can be obtained by molding the FPC unit 30 as a primary molded product with a resin (see FIG. 3A). ). In the present embodiment, the flange wall portion 421, the flange wall portion 422, and the flange wall portion 423 are molded so as to contact the FPC case 33, and the flange 40 is provided in the recess 341, the recess 342, and the recess 343 of the FPC case 33. The FPC unit 30 and the flange 40 are integrally formed by being partially filled.

Next, the operation of the fuel supply device 1 will be described.
The ECU 7 calculates the amount of fuel to be supplied to the engine 6 based on information from various sensors. Subsequently, the ECU 7 transmits a control signal to the FPC unit 30 so that electric power corresponding to the calculated amount of fuel is supplied to the fuel pump 12. The FPC unit 30 controls the electric power supplied to the fuel pump 12 based on the control signal transmitted from the ECU 7. Specifically, the power supplied to the fuel pump 12 is controlled by transforming the voltage of the battery 8 by the DC-DC converter inside the FPC circuit 31 and applying it to the fuel pump 12.

  When the fuel pump 12 is operated by being supplied with electric power, the fuel in the reservoir cup 10 is sucked into the fuel pump 12 and discharged from the discharge port 46 to the outside of the fuel tank 2 via the pipe 15. The fuel discharged from the discharge port 46 is supplied to the engine 6 via the fuel pipe 3, the fuel rail 4 and the injector 5.

Next, the advantageous effects of the present embodiment over the comparative example will be clarified by describing the configuration of the pump control module according to the comparative example.
As shown in FIGS. 6 and 7, the pump control module 70 according to the comparative example includes an FPC unit 80, a flange 90, and the like.

As shown in FIG. 6A, the pump control module 70 is formed by molding (secondary molding) an FPC unit 80 (see FIG. 6C) as a primary molded product with a resin flange 90. Has been. That is, the pump control module 70 is integrally formed by molding the FPC unit 80 and the flange 90.
As shown in FIGS. 6B and 6C, the FPC unit 80 includes an FPC circuit 81, a heat sink 82, an FPC case 83, and the like.

The FPC circuit 81 has the same configuration as the FPC circuit 31 of this embodiment. The FPC circuit 81 has a plurality of terminals 800.
The heat sink 82 is formed in a substantially rectangular parallelepiped shape from a metal such as aluminum. A plurality of heat radiation grooves 821 are formed on the upper surface of the heat sink 82. An accommodation recess 822 is formed on the lower surface of the heat sink 82. The FPC circuit 81 is housed in the housing recess 822. A connector terminal 811 is welded to each of the plurality of terminals 800.

  The FPC case 83 is made of polyphenylene sulfide resin and accommodates an FPC circuit 81 therein. More specifically, the FPC case 83 is formed so as to cover a part of the FPC circuit 81, the terminal 800, and the connector terminal 811 and to fill the housing recess 822 of the heat sink 82. That is, the FPC circuit 81, the terminal 800, the connector terminal 811, the heat sink 82, and the FPC case 83 are integrally formed by molding to constitute the FPC unit 80. Here, the connector terminal 811 is molded so that one end is exposed from the FPC case 83.

As shown in FIG. 6C, the FPC unit 80 (heat sink 82) is formed in a substantially rectangular parallelepiped shape. Therefore, four corners 837 are formed in the FPC unit 80 by the adjacent side surfaces.
As shown in FIG. 7, the flange 90 includes a flange main body 91, a flange wall portion 92, and the like.

  The flange 90 is made of polyacetal resin. A material made of polyacetal resin has a molding shrinkage rate, a thermal expansion rate, and a fuel swelling rate higher than those of a metal such as aluminum or a material made of polyphenylene sulfide resin. Therefore, in the comparative example, the flange 90 has a larger molding shrinkage rate, thermal expansion rate, and fuel swelling rate than the heat sink 82 and the FPC case 83 of the FPC unit 80.

The flange main body 91 is formed in a substantially disc shape. The flange 90 is attached to the fuel tank 2 such that the flange main body 91 closes the opening 9 of the fuel tank 2. An FPC unit 80 is provided on the surface 911 of the flange body 91 opposite to the fuel pump 12.
The flange wall portion 92 is formed in a cylindrical shape so as to extend substantially perpendicularly from the surface 911 of the flange main body 91. The flange wall 92 is formed so that the inner wall abuts the outer wall of the FPC unit 80 (the side wall of the heat sink 82) over the entire circumference in the circumferential direction. That is, the flange wall portion 92 is formed so as to cover the entire circumference of the FPC unit 80 (including the corner portion 837).

The flange 90 is formed so as to cover the FPC case 83 and a part of the connector terminal 811 exposed from the FPC case 83. As described above, the FPC unit 80 as the primary molded product is molded with resin, whereby the pump control module 70 in which the FPC unit 80 and the flange 90 are integrated is configured.
As shown in FIG. 7B, in the comparative example, the FPC unit 80 is molded with a resin flange 90 (flange wall 92) so as to surround the entire circumference without interruption. Therefore, after molding, the flange 90 (flange wall portion 92) contracts to deform the FPC unit 80, and there is a possibility that residual stress in the tensile direction may be generated in the portion of the flange 90 that contacts the FPC unit 80. . In particular, there is a possibility that a large residual stress may be generated in a portion of the flange 90 (flange wall portion 92) that contacts the corner portion 837 of the FPC unit 80 (a portion indicated by S in FIG. 7B). Since the molding shrinkage rate of the resin material (polyacetal resin) forming the flange 90 is large, there is a concern that excessive residual stress is generated in the flange 90.

  Further, in the comparative example, the heat sink 82 and the FPC case 83 constituting the FPC unit 80 are formed of a metal such as aluminum or polyphenylene sulfide resin, and thus hardly cause thermal expansion and contraction and fuel swelling. Since the flange 90 that molds the periphery of the FPC unit 80 is made of polyacetal resin, it tends to cause thermal expansion and contraction and fuel swelling. Therefore, the flange 90 may be deformed due to the ambient temperature change or the influence of the fuel in the fuel tank 2, and an excessive stress may be generated in the flange 90. In particular, when the flange 90 is thermally contracted due to a change in ambient temperature, an excessive tensile stress may occur in the flange 90. In general, since the tensile strength of the resin material is significantly lower than the compressive strength, there is a possibility that the flange 90 may be cracked or cracked when particularly a tensile stress is generated in the resin flange 90 molded around the FPC unit 80. .

  On the other hand, in the present embodiment, although the FPC unit 30 and the flange 40 are integrally formed by molding, the flange 40 does not have a configuration that surrounds the entire periphery of the FPC unit 30 (FIG. 3A). FIG. 4 and FIG. 5). More specifically, the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 do not surround the FPC case 33 without being interrupted all around, but surround a part of the periphery of the FPC case 33. It is. That is, a gap (CL1) is formed between the end portions in the circumferential direction of the FPC case 33 of the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422. In this configuration, when the flange 40 is subjected to molding shrinkage or heat shrinkage, tensile stress that can be generated in the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 can be reduced. Further, when the flange 40 is thermally expanded or fuel swells, stress may be generated in the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422, but the stress can be reduced by the gap CL1.

  In the present embodiment, since the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 surround a part of the periphery of the FPC case 33, an external impact is applied to the flange wall portion 421 and the flange wall portion 423. Further, by blocking with the flange wall portion 422, it is possible to suppress the impact from being applied to the FPC case 33 (FPC unit 30). That is, the FPC unit 30 can be protected from impact by the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422. Furthermore, since the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 are formed so as to contact the outer wall of the FPC case 33, the FPC unit 30 is displaced in the surface direction of the flange main body 41 with respect to the flange 40. Can be suppressed.

  As described above, in the present embodiment, in the configuration in which the FPC unit 30 and the flange 40 are molded, the FPC unit 30 is protected from an impact by the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422, and the flange 40 is protected. While suppressing the displacement of the FPC unit 30, it is possible to reduce the stress that can be generated in the flange 40 (the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422). Therefore, it is possible to suppress the occurrence of cracks and cracks in the flange 40, particularly the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422. In the present embodiment, since the molding shrinkage rate, thermal expansion rate, and fuel swelling rate of the flange 40 are larger than those of the FPC case 33, the above-described “flange wall portion 421, flange wall portion 423, and flange wall portion 422 may occur. The effect of “reducing tensile stress” becomes higher.

  In the present embodiment, the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 are formed at predetermined intervals in the circumferential direction of the FPC case 33. In this configuration, a gap CL1 is formed between adjacent flange wall portions (between the flange wall portion 421 and the flange wall portion 423 and between the flange wall portion 422 and the flange wall portion 423). Therefore, even if the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 are molded shrinkage, thermal shrinkage, thermal expansion, or fuel swelling, excessive stress is applied to the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422. Can be suppressed. Further, by forming a plurality of flange wall portions (the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422), the above-mentioned effect of “protecting the FPC unit 30 from impact” and “the FPC unit for the flange 40” The effect of “suppressing the positional deviation of 30” can be further enhanced.

In the present embodiment, the FPC case 33 has a recess 341, a recess 342, and a recess 343 that are formed so as to be recessed toward the side opposite to the flange 40. The flange 40 includes a filling convex portion 431, a filling convex portion 432, and a filling convex portion 433 that are formed so as to protrude toward the FPC case 33 by filling the concave portion 341, the concave portion 342, and the concave portion 343.
In this configuration, when the flange 40 undergoes molding shrinkage or heat shrinkage, tensile stress is unlikely to occur in the filling convex portion 431, the filling convex portion 432, and the filling convex portion 433 of the flange 40. Further, in this configuration, when the flange 40 is thermally expanded or fuel swells, the filling convex portion 431, the filling convex portion 432, and the filling convex portion 433 of the flange 40 are compressed in the concave portion 341, the concave portion 342, and the concave portion 343. Although stress is generated, tensile stress is hardly generated. As described above, in this embodiment, in the configuration in which the FPC unit 30 and the flange 40 are molded, the tensile stress that can be generated in the filling convex portion 431, the filling convex portion 432, and the filling convex portion 433 of the flange 40 can be reduced. it can. Therefore, it can suppress that a crack and a crack arise in the flange 40. FIG. In the present embodiment, since the molding shrinkage rate, thermal expansion rate, and fuel swelling rate of the flange 40 are larger than those of the FPC case 33, the “filling convex portion 431, filling convex portion 432, and filling convex portion 433 of the flange 40 described above are used. The effect of “reducing the tensile stress that can occur in the case of the present invention” becomes higher.

  In the present embodiment, the filling convex portion 432 and the filling convex portion 433 are formed on the “surface that contacts the FPC case 33” of the flange wall portion 421 and the flange wall portion 422. The concave portion 342 and the concave portion 343 are formed on the “surface contacting the flange wall portion 421 and the flange wall portion 422” of the FPC case 33. In this configuration, even if the flange 40 is subjected to molding shrinkage, heat shrinkage, thermal expansion, or fuel swelling, tensile stress is generated in the filling convex portion 432 and the filling convex portion 433 formed on the flange wall portion 421 and the flange wall portion 422. Hateful. Therefore, it is possible to reduce the tensile stress that can be generated in the flange wall portion 421 and the filling convex portion 432 and the filling convex portion 433 of the flange wall portion 422, and to suppress the occurrence of cracks and cracks in the flange wall portion 421 and the flange wall portion 422. Can do.

  Further, in the present embodiment, the flange 40 is formed between the flange main body 41 and the flange wall portion 421, the flange wall portion 422, and the flange wall portion 423 and the “surface opposite to the surface that contacts the FPC case 33”. The rib 44 is provided. Accordingly, the base portions of the plate-like flange wall portion 421, the flange wall portion 422, and the flange wall portion 423 can be reinforced, and the above-described effects of “protecting the FPC unit 30 from impact” and “the FPC with respect to the flange 40”. The effect of “suppressing the displacement of the unit 30” can be further enhanced.

  In the present embodiment, the FPC case 33 is formed in a substantially rectangular parallelepiped shape. The flange wall portion 421, the flange wall portion 422, and the flange wall portion 423 are formed so as to contact three of the four side surfaces (the side surface 333, the side surface 334, and the side surface 335) of the FPC case 33. The flange 40 is formed so as to extend substantially vertically from the flange body 41 at a position away from a side surface (side surface 336) of the four side surfaces of the FPC case 33 where the flange wall portion is not in contact. One upper connector 451 is provided. The first upper connector 451 is used to connect a wire harness for power supply and signal communication to the FPC unit 30 and the fuel pump 12.

In this configuration, the flange wall portion 421, the flange wall portion 422, and the flange wall portion 423 are in contact with three of the four side surfaces of the FPC case 33, but are not in contact with the remaining one side surface. Therefore, even if the flange wall portion 421, the flange wall portion 422, and the flange wall portion 423 are molded shrinkage, thermal shrinkage, thermal expansion, or fuel swelling, excessive stress is applied to the flange wall portion 421, the flange wall portion 422, and the flange wall portion 423. Can be suppressed.
Further, three of the four side surfaces of the FPC case 33 are surrounded by the flange wall portion 421, the flange wall portion 422 and the flange wall portion 423, and the first upper connector 451 is formed at a position away from the remaining one side surface by a predetermined distance. By doing so, the FPC unit 30 can be protected from the impact from the four directions around the FPC case 33.

  In the present embodiment, the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 are formed so as to correspond to the respective side surfaces of the FPC case 33. A gap CL <b> 1 formed between adjacent flange wall portions is located at a corner portion 337 and a corner portion 338 formed by adjacent side surfaces of the FPC case 33. As described above, in the present embodiment, the flange wall portion 421, the flange wall portion 423, and the flange wall portion 422 do not contact the corner portion 337 and the corner portion 338 of the FPC case 33. It can suppress that a big stress arises in the part 423 and the flange wall part 422. FIG.

  In the present embodiment, the FPC unit 30 is provided on the opposite side of the flange body 41 from the fuel pump 12. The filling convex portion 431 is formed on the “surface 411 opposite to the fuel pump 12” of the flange main body 41. The recess 341 is formed on a predetermined surface (lower surface 332) of the FPC case 33 that faces the “surface 411 opposite to the fuel pump 12” of the flange body 41. In this configuration, even if the flange main body 41 undergoes molding shrinkage, heat shrinkage, thermal expansion, or fuel swelling, tensile stress is hardly generated in the filling convex portion 431 formed on the flange main body 41. Therefore, the tensile stress that can be generated in the flange main body 41 can be reduced, and the occurrence of cracks and cracks in the flange main body 41 can be suppressed.

In the present embodiment, the inner wall (CS1) of the FPC case 33 that forms the end portion on the upper surface 331 side of the concave portion 341, and the outer wall of the FPC case 33 that forms the inner wall and the lower surface 332 of the FPC case 33 that forms the concave portion 341. (CS2) is formed in a curved surface.
Further, a part of the corner (CS3) formed by the lower surface 332 and the side surface 333 of the FPC case 33, a part of the corner (CS4) formed by the lower surface 332 and the side 334, and the lower surface 332 and the side surface. A part (CS5) of a corner formed by 335 is formed in a curved surface shape.

Further, the outer wall of the end portion on the upper surface 331 side of the filling convex portion 431 is formed in a curved surface shape corresponding to the shape of the inner wall (CS1) of the concave portion 341. Further, the outer wall of the end portion of the filling convex portion 431 on the “surface 411 side of the flange main body 41” is formed in a curved surface shape corresponding to the shape of the wall surface (CS2) that comes into contact.
Further, between the “surface contacting the FPC case 33” of the flange wall portion 421, the flange wall portion 422 and the flange wall portion 423 and the surface 411 of the flange main body 41, the shape of the contacting FPC case 33 (CS3, CS4, It is formed in a curved surface shape corresponding to CS5).
Thus, in this embodiment, it can avoid that stress concentrates on the predetermined | prescribed location of each member by forming the location corresponding to the corner | angular part of each member in a curved surface shape.

(Other embodiments)
In the above-described embodiment, an example is shown in which the flange is formed of polyacetal resin (POM resin) and the FPC case is formed of polyphenylene sulfide resin (PPS resin). On the other hand, in another embodiment of the present invention, as shown in FIG. 8, the flange is formed of polyacetal resin (POM resin) and the FPC case is made of metal, polybutylene terephthalate resin (PBT resin), polyamide resin (PA Resin), polyphenylene ether resin (PPE resin), ABS resin, or polyphthalamide resin (PPA resin). Also, the flange is made of polyphthalamide resin (PPA resin), and the FPC case is either polyphenylene sulfide resin (PPS resin), metal, polybutylene terephthalate resin (PBT resin), polyphenylene ether resin (PPE resin) or ABS resin It is good also as forming by.

Polyacetal resin (POM resin) has molding shrinkage ratio, thermal expansion coefficient and fuel swelling ratio in metal, polybutylene terephthalate resin (PBT resin), polyamide resin (PA resin), polyphenylene ether resin (PPE resin), ABS resin and It is larger than polyphthalamide resin (PPA resin). Polyphthalamide resin (PPA resin) has a molding shrinkage rate, a thermal expansion rate, and a fuel swelling rate, such as polyphenylene sulfide resin (PPS resin), metal, polybutylene terephthalate resin (PBT resin), polyphenylene ether resin (PPE resin). ) And ABS resin. Therefore, if the flange and the FPC case are formed according to the combination of the above-described materials, the effect of “reducing the tensile stress that can be generated in the flange” described above can be enhanced.
Further, the flange and the FPC case are not limited to the materials described above, and may be formed of any material. Further, the flange and the FPC case may be formed of the same material.

  In the above-described embodiment, an example in which the flange has three “plate-like flange wall portions formed at predetermined intervals in the circumferential direction of the FPC case” has been described. On the other hand, in other embodiment of this invention, the structure which adjacent flange wall parts connect may be sufficient. Further, the number of flange wall portions is not limited to three, and any number of flange wall portions may be formed.

In the above-described embodiment, the FPC case has a “concave portion formed so as to be recessed toward the opposite side of the flange”, and the flange is formed so as to protrude toward the FPC case side by being filled in the concave portion. An example having a “filling convex portion” is shown. On the other hand, in another embodiment of the present invention, the flange has a “recess formed to be recessed toward the opposite side of the FPC case”, and the FPC case is projected to the flange side by being filled in the recess. It is good also as a structure which has the "filling convex part formed so that it may do." In this configuration, when the FPC case is subjected to molding shrinkage or heat shrinkage, tensile stress is hardly generated on the filling convex portion of the FPC case. Further, when the FPC case is thermally expanded or the fuel is swollen, the filling convex portion of the FPC case is hardly subjected to tensile stress although compressive stress is generated in the concave portion. Thus, with this configuration, it is possible to reduce the tensile stress that can occur in the filling convex portion of the FPC case. Therefore, it can suppress that a crack and a crack arise in a FPC case. In this configuration, when the molding shrinkage rate, thermal expansion rate, or fuel swelling rate of the FPC case is larger than that of the flange, the above-described effect of “reducing tensile stress that can be generated on the filling convex portion of the FPC case” becomes higher. .
Moreover, in other embodiment of this invention, it is good also as a structure which does not form the said recessed part and the said filling convex part.

  In another embodiment of the present invention, the flange wall portion may be provided so as to come into contact with the four side surfaces of the FPC case. In this configuration, the flange wall portion is in contact with the four side surfaces of the FPC case, but a gap is formed between the end portions of the flange wall portion in the circumferential direction of the FPC case. Therefore, even if the flange wall portion is molded shrinkage, heat shrinkage, thermal expansion, or fuel swelling, it is possible to suppress the occurrence of excessive stress on the flange wall portion.

Moreover, in other embodiment of this invention, how many ribs formed between a flange wall part and a flange main body may be formed. Alternatively, no rib may be formed.
Moreover, in the above-mentioned embodiment, the example which forms an FPC case in a substantially rectangular parallelepiped shape was shown. On the other hand, in another embodiment of the present invention, the FPC case may be formed in other shapes such as a polygonal column shape or a cylindrical shape. Further, the FPC unit may not have a heat sink.

  Thus, the present invention is not limited to the above-described embodiment, and can be applied to other various embodiments without departing from the gist thereof.

2 ... Fuel tank 9 ... Opening 12 ... Fuel pump 20 ... Pump control module 30 ... FPC unit (pump control unit)
31 ... FPC circuit (control circuit)
33 ... FPC case (circuit case)
40 ... Flange (lid member)
41 ... Flange body (lid member body)
421, 422, 423 ... Flange wall (lid member wall)

Claims (10)

A pump control module for controlling a fuel pump disposed in a fuel tank,
A control circuit for controlling the power supplied to the fuel pump, and a pump control unit having a circuit case for housing the control circuit;
A plate-shaped lid member body that is formed integrally with the pump control unit and closes the opening of the fuel tank, and extends substantially perpendicularly from the lid member body so that one surface abuts the outer wall of the circuit case. A resin lid member having a plate-like lid member wall portion to be formed,
The pump control module according to claim 1, wherein the lid member wall portion is formed so as to abut on the outer wall of the circuit case in a predetermined range of the entire circumferential range of the circuit case.   The pump control module according to claim 1, wherein a plurality of the lid member wall portions are formed at predetermined intervals in the circumferential direction of the circuit case.   3. The pump control module according to claim 1, wherein the lid member has a molding shrinkage rate, a thermal expansion rate, or a fuel swelling rate higher than that of the circuit case. One of the circuit case and the lid member has a recess formed to be recessed toward the opposite side of the other,
The other of the said circuit case and the said cover member has a filling convex part formed so that it may protrude to one side by being filled with the said recessed part, The Claim 1 characterized by the above-mentioned. Pump control module. The filling convex portion is formed on the “surface contacting the circuit case” of the lid member wall portion,
5. The pump control module according to claim 4, wherein the recess is formed in a “surface that contacts the lid member wall” of the circuit case. The pump control unit is provided on the opposite side of the lid member body from the fuel pump,
  The filling convex portion is formed on the “surface opposite to the fuel pump” of the lid member main body,
  The said recessed part is formed in the predetermined | prescribed surface of the said circuit case facing the "surface on the opposite side to the said fuel pump" of the said lid member main body. The pump control module described in. The said cover member has a rib formed between the "surface opposite to the surface which contacts the said circuit case" of the said cover member wall part, and the said cover member main body. 6 pump control module according to any one of. The circuit case is formed in a substantially rectangular parallelepiped shape,
The pump control module according to any one of claims 1 to 7 , wherein the lid member wall portion is provided so as to abut on four side surfaces of the circuit case. The circuit case is formed in a substantially rectangular parallelepiped shape,
The lid member wall portion is formed to abut on three of the four side surfaces of the circuit case,
The lid member is formed so as to extend substantially perpendicularly from the lid member body at a position away from a side surface of the four side surfaces of the circuit case where the lid member wall portion is not in contact. pump control module according to any one of claims 1 to 7, characterized in that it has a part. A plurality of the lid member wall portions are formed so as to correspond to the respective side surfaces of the circuit case,
The pump control module according to claim 8 or 9 , wherein a gap formed between the adjacent lid member wall portions is located at a corner portion formed by the adjacent side surfaces of the circuit case.

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