JP2010112183A - Control device for fuel pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of part items and installation man-hours in a control device for a fuel pump. <P>SOLUTION: This control device 12 for the fuel pump has an IC21 for controlling a driving current supplied to a motor of the fuel pump, electronic parts 22-24 for removing electric noise from the IC21, a housing 14 for storing the IC21 and the electronic parts 22-24, a connector 15 arranged adjacent to the housing 14, and an external terminal 25a arranged in the connector 15 and connected to external wiring. The control device 12 has a plurality of wirings 25 including the external terminal 25a and an extension wiring part 25b integrally extending from its terminal 25a. The housing 14 is integrally molded with the plurality of wirings 25, and a part of the extension wiring part 25b is arranged so as to be exposed from the housing 14, and the electronic parts 22-24 are supported by and electrically connected to an exposed part of the extension wiring part 25b. The IC21 fixed to a cover 17 is connected to an internal terminal 25c of the wirings 25 via buss bar 27. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel pump control device used to control the movement of a fuel pump.

  Conventionally, a fuel supply apparatus described in Patent Document 1 below is known as this type of technology. This device is a closing member (set plate) that closes the opening formed in the upper part of the fuel tank, a container part provided in the set plate, and a motor for the fuel pump in the fuel tank that is accommodated in the container part Controller. This controller includes an IC chip including a switching element, and a filter circuit that absorbs noise generated in the IC chip and suppresses the outflow to others. The filter circuit includes a choke coil and a capacitor. The IC chip and the filter circuit are mounted on a circuit board. An electrical connector including wiring terminals is integrally formed in the container portion. The IC chip and the filter circuit are electrically connected to the terminals of the electrical connector via a circuit board and a bus bar.

JP 2007-303360 A

  However, in the apparatus described in Patent Document 1, since the circuit board and the bus bar are used to electrically connect the IC chip, the filter circuit, and the terminals of the electrical connector, the number of parts is increased accordingly. As a result, the assembly man-hours such as connection increased. Further, the space of the container part on the set plate needs to be as small as possible for reasons of vehicle mounting, and it is desired that the container part accommodates an IC chip and a filter circuit as compactly as possible.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a fuel pump control device that can reduce the number of parts and the number of assembly steps. Another object of the present invention is to provide a compact control device for a fuel pump.

  In order to achieve the above object, an invention according to claim 1 includes an integrated circuit for controlling a drive current supplied to a motor of a fuel pump, an electronic component for removing electrical noise from the integrated circuit, A fuel pump control device comprising: a housing for housing an integrated circuit and electronic components; a connector provided adjacent to the housing; and an external terminal provided on the connector and connected to an external wiring. A plurality of wires formed of the same material including an extended wiring portion integrally extending from the external terminal, and a housing is formed integrally with the plurality of wires, and a part of the extended wiring portion is exposed from the housing. The electronic component is supported and electrically connected to the exposed portion of the extension wiring portion.

  According to the configuration of the invention, the electronic component is directly supported and connected to the extension wiring portion provided in the housing integrally with the external terminal of the connector, so that a circuit board and a bus bar are not necessary.

  In order to achieve the above object, according to a second aspect of the present invention, in the first aspect of the present invention, the plurality of wirings are each formed of a long plate material, and the plurality of extended wiring portions are arranged so that the width surfaces face each other. The purpose is to arrange them in the same direction.

  According to the configuration of the above invention, in addition to the operation of the invention described in claim 1, a relatively wide pitch can be obtained between the plurality of extended wiring portions even in a limited space of the housing.

  In order to achieve the above object, according to a third aspect of the present invention, in the first or second aspect of the present invention, an electronic component is disposed between adjacent extension wiring portions and the electronic component is sandwiched therebetween. The purpose is that adjacent extension wiring portions are bent in accordance with the outer shape of the electronic component.

  According to the configuration of the invention, in addition to the operation of the invention according to claim 1 or 2, the electronic component is sandwiched between the adjacent extension wiring portions without intentionally expanding the space between the plurality of extension wiring portions. Arranged.

  In order to achieve the above object, according to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a recess for inserting an electronic component is provided in the housing, and at least the electronic component is provided in the concave portion. The purpose is to insert a part.

  According to the configuration of the above invention, in addition to the operation of the invention according to any one of claims 1 to 3, the electronic component is accommodated in the recess, so that the electronic component is positioned and protected.

  In order to achieve the above object, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein a recess is formed in a portion of the extension wiring portion connected to the electronic component, The intent is that the connection terminals of the recessed electronic components are engaged and connected.

  According to the configuration of the invention, in addition to the operation of the invention according to any one of claims 1 to 4, since the connection terminal of the electronic component is engaged with the recess of the extension wiring part, the connection terminal for the extension wiring part It becomes easy to position.

  In order to achieve the above object, according to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the housing includes a cover that covers the electronic component supported and connected to the extension wiring portion. The purpose is to provide an integrated circuit on the inner wall of the cover.

  According to the configuration of the invention, in addition to the operation of the invention according to any one of claims 1 to 5, the work of attaching the electronic component to the housing and the work of attaching the integrated circuit to the cover are separated.

  According to the first aspect of the present invention, as the fuel pump control device, the number of parts and the number of assembly steps can be reduced, and the cost can be reduced.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, it is possible to facilitate the connection of the electronic component to the extension wiring portion, and to achieve a compact fuel pump control device. be able to.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the fuel pump control device can be further downsized.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, it is possible to further facilitate the connection of the electronic component to the extension wiring portion. The durability of can be improved.

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the connection of the electronic component to the extension wiring portion can be made easy and strong.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, it is possible to make the production of the fuel pump control device more efficient.

[First Embodiment]
Hereinafter, a first embodiment of a fuel pump control device according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a sectional view showing a resin fuel tank 1 mounted on an automobile. In the fuel tank 1, a high-pressure filter cover 3 that is separate from the tank body 2 is provided. The high pressure filter cover 3 is provided with an electric fuel pump 4, fuel passages 5 a and 5 b, a pressure regulator 6, and a high pressure fuel filter 7. A fuel filter 8 is provided at the suction port of the fuel pump 4.

  When the fuel pump 4 is operated, the fuel stored in the tank main body 2 is sucked into the fuel pump 4 through the fuel filter 8, passes through the high-pressure fuel filter 7 through the fuel passage 5a, and further passes through the fuel passage 5b. Then, the pressure is regulated by the pressure regulator 6 and discharged from the outlet 9. The discharged fuel is supplied to the engine through a fuel line (not shown).

  A resin-covered set plate 11 that closes the opening 10 at the top of the fuel tank 1 is detachably attached to the uppermost portion of the high-pressure filter cover 3. The set plate 11 is provided with a control device 12 for controlling the fuel pump 4. The fuel pump 4 is electrically connected to the control device 12. The fuel pump 4 includes a motor 13 as a drive source and a pump unit 4a that is driven by the motor 13 and boosts the fuel. The pump unit 4 a is provided with a rotating member (not shown) such as a fin that is rotated by the rotor of the motor 13.

  FIG. 2 is a sectional view of the control device 12. The control device 12 includes a housing 14 partially molded with the set plate 11, a connector 15 integrally molded with the set plate 11 adjacent to the housing 14, and an integrated circuit (hereinafter “ IC ") 21 and a plurality of electronic components 22-24. The housing 14 includes a box-shaped housing main body 16 that opens upward, and a cover 17 that closes the opening of the main body 16. The housing main body 16 is formed of resin integrally with the set plate 11, and the cover 17 is formed of metal. The cover 17 is welded to the housing body 16. The connector 15 has a box shape smaller than the housing body 16 and opens upward. In the connector 15, a part of the plurality of external terminals 25a connected to the external wiring is exposed. In this embodiment, each of the plurality of external terminals 25 a constitutes a part of the wiring 25 extending from the connector 15 to the housing body 16. That is, a plurality of wires 25 formed of the same material including the external terminal 25a and the extended wiring portion 25b extending integrally from the external terminal 25a are provided from the connector 15 to the housing body 16. In this embodiment, the connector 15 and the housing main body 16 are formed by resin molding (insert molding) integrally with the plurality of wires 25, and the upper portion of the extended wiring portion 25 b is exposed from the bottom of the housing main body 16. The wiring 25 further includes an internal terminal 25c erected upward from one end of each extended wiring portion 25b.

  FIG. 3 is a plan view showing the housing body 16 and the connector 15 from which the cover 17 has been removed. FIG. 4 is a plan view showing a state where the electronic components 22 to 24 are removed from the housing main body 16 of FIG. FIG. 5 is an exploded sectional view of the control device 12 shown in FIG. In the connector 15, a part of the plurality of external terminals 25 a protrudes upward and is aligned. A plurality of extended wiring portions 25 b are exposed in the housing body 16. Each of the electronic components 22 to 24 is for removing electrical noise from the IC 21. Specifically, these electronic components 22-24 are comprised from a choke coil and a capacitor | condenser. Each electronic component 22-24 is provided with a pair of connecting terminals 22a, 23a, 24a at its lower end. The electronic components 22 to 24 are supported and electrically connected to the exposed portions of the extended wiring portions 25b via connection terminals 22a to 24a. As shown in FIG. 3, each electronic component 22-24 is arrange | positioned ranging over two adjacent extension wiring parts 25b, and those connection terminals 22a-24a are fixed by welding 30 on each extension wiring part 25b. The

  Here, the plurality of wirings 25 are each formed of a long plate material having a predetermined width. In this embodiment, each electronic component 22-24 has a vertically long shape. Each wiring 25 is provided with a twist of 90 ° with respect to the external terminal 25a and the internal terminal 25c on both sides of the extended wiring portion 25b only. As shown in FIGS. 2 to 4, the plurality of extension wiring portions 25 b are arranged in the same direction (in this case, in parallel) such that their width surfaces SW are arranged vertically and face each other. Moreover, each electronic component 22-24 is arrange | positioned so that the longitudinal direction may correspond with a perpendicular direction. That is, in this embodiment, the longitudinal direction of each electronic component 22-24 and the width surface SW of each extension wiring part 25b are arranged in the same direction (vertical direction).

  In FIG. 6, as an example, the connection relationship between the electronic component 23 and the extended wiring portion 25b is disassembled and shown in an enlarged cross-sectional view. As shown in FIGS. 4-6, V-shaped dent 25d is formed in the connection site | part with each electronic components 22-24 of the extended wiring part 25b. The connection terminals 22a to 24a of the electronic components 22 to 24 are engaged with the recesses 25d and connected by welding 30.

  The IC 21 is for controlling the drive current supplied to the motor 13 of the fuel pump 4. The IC 21 is attached to the ceiling inner wall of the cover 17 via a heat radiation pad 26. The IC 21 includes a protruding metal plate 21a for heat dissipation. The heat dissipating pad 26 is made of a liquid or sheet-like silicone material, and has a heat conduction function for transferring the heat of the metal plate 21 a to the cover 17. Since the heat dissipating pad 26 is provided in contact with the cover 17, the metal cover 17 also functions as a heat radiator of the IC 21. A bus bar 27 for wiring is connected to the IC 21. The front end portion of the bus bar 27 is connected to the internal terminal 25 c of the wiring 25 described above. The cover 17 to which the IC 21 or the like is attached is configured to cover the electronic components 22 to 24 while being fixed to the housing body 16. Therefore, in order to manufacture the control device 12, first, the electronic components 22 to 24 are supported on the extended wiring portions 25 b by the housing body 16 and connected by welding 30. Next, the cover 17 to which the IC 21 or the like is attached may be put on the housing body 16 and welded.

  According to the fuel pump control device 12 of this embodiment described above, the housing 14 is formed integrally with the plurality of wires 25, and a part of the extended wiring portion 25b of the wires 25 is exposed from the housing body 16. Provided. Moreover, each electronic component 22-24 is supported by the exposed part of each extension wiring part 25b, and is electrically connected. Accordingly, since the electronic components 22 to 24 are directly supported and connected to the extended wiring portions 25b provided in the housing body 16 integrally with the external terminal 25a of the connector 15, unlike the conventional example, a circuit board or a bus bar is provided. Is no longer necessary. As a result, as the fuel pump control device 12, the number of parts and the number of assembling steps can be reduced, and the cost can be reduced.

  According to this embodiment, the plurality of wirings 25 are each formed of a long plate material, and the plurality of extended wiring portions 25b are arranged in parallel in the housing body 16 so that their width surfaces SW face each other. Therefore, as shown in FIG. 4, a relatively wide pitch P1 can be obtained between the plurality of extended wiring portions 25b even in a limited space of the housing 14. Here, it is assumed that the width surfaces SW of the respective extended wiring portions 25b are arranged parallel to each other in the horizontal direction. In this case, if a pitch similar to the pitch P1 shown in FIG. 4 is to be secured, the width of the housing body 16 needs to be larger than that shown in FIG. For this reason, according to the present embodiment, the connection of the electronic components 22 to 24 to the respective extended wiring portions 25b in the housing body 16 can be facilitated by the wide pitch P1 between the adjacent extended wiring portions 25b. it can. In addition, the control device 1 can be made compact as much as it is not necessary to increase the width of the housing body 16.

  According to this embodiment, since the recess 25d is formed in the portion connected to the electronic components 22-24 of each extension wiring portion 25b, and the connection terminals 22a-24a are engaged with the recess 25d, each extension wiring portion 25b. Positioning of the connection terminals 22a to 24a with respect to is facilitated. As a result, the connection of the electronic components 22 to 24 to each extended wiring portion 25b can be made easy and strong.

  According to this embodiment, the housing 14 includes the cover 17 that covers the electronic components 22 to 24 and the like that are supported and connected to the extension wiring portion 25b, and the IC 21 and the like are attached to the ceiling inner wall of the cover 17, so the housing body 16 The work of attaching the electronic components 22 to 24 and the work of attaching the IC 21 to the cover 17 are divided. For this reason, the manufacturing of the fuel pump control device 12 can be made more efficient by performing each operation in parallel or attaching the IC 21 or the like to the cover 17 in advance.

[Second Embodiment]
Next, a fuel pump control apparatus according to a second embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different points are mainly described.

  This embodiment is different from the first embodiment in the mounting direction of each electronic component 22 to 24 and the configuration related to the mounting. FIG. 7 shows a cross-sectional view of the control device 31 of this embodiment. The height of the housing body 16 of the control device 31 is lower than half that of the first embodiment. A plurality of recesses 32 into which the electronic components 22 to 24 are inserted are provided on the bottom of the housing body 16. In this embodiment, the electronic components 22 to 24 are arranged upside down with respect to those of the first embodiment. In addition, most of the electronic components 22 to 24 are fitted in the recesses 32.

  FIG. 8 is a plan view of the housing body 16 and the connector 15 from which the cover 17 has been removed. FIG. 9 is a plan view showing a state where the electronic components 22 to 24 are removed from the housing main body 16 of FIG. FIG. 10 is an exploded cross-sectional view of FIG. As shown in FIGS. 8 and 9, in this embodiment, the electronic components 22 to 24 are arranged between adjacent extension wiring portions 25b. Moreover, the adjacent extended wiring part 25b which pinched | interposed each electronic component 22-24 contains the bending part 25e bent in the circular arc shape according to the outer shape of each electronic component 22-24. The concave portion 32 of the housing main body 16 is arranged in alignment with the bent portion 25e. Then, in a state where each electronic component 22-24 is fitted in the bent portion 25e and the recess 32 of the adjacent extension wiring portion 25b, each electronic component 22-24 is connected to each connection terminal 22a in each extension wiring portion 25b. Are supported and electrically connected through .about.24a. Also in this embodiment, the connection terminals 22 a to 24 a of the respective electronic components 22 to 24 are engaged by the V-shaped recess 25 d formed in the extended wiring portion 25 b and connected by welding 30.

  According to the fuel pump control device 31 of this embodiment described above, the electronic components 22 to 24 are arranged between the adjacent extended wiring portions 25b. In addition, a bent portion 25e adapted to the outer shape of each electronic component 22-24 is provided in the adjacent extended wiring portion 25b sandwiching each electronic component 22-24. Accordingly, the electronic components 22 to 24 are disposed between the adjacent extension wiring portions 25b without enlarging the space between the plurality of extension wiring portions 25b. In this sense, the fuel pump control device 31 can be made compact.

  In this embodiment, the housing body 16 is provided with recesses 32 for inserting the electronic components 22 to 24, and most of the electronic components 22 to 24 are fitted into the recesses 32. Therefore, since each electronic component 22-24 is accommodated in the recessed part 32, each electronic component 22-24 is positioned and protected. For this reason, the welding operation with respect to the extension wiring part 25b of each connection terminal 22a-24a can be made easy by positioning each electronic component 22-24. Moreover, durability of each electronic component 22-24 can be improved because each electronic component 22-24 can be protected. Moreover, in this embodiment, since the volume of the housing main body 16 can be made low, compared with 1st Embodiment, the apparent physique of the control apparatus 31 for fuel pumps can be made compact. Specifically, the protrusion of the housing 14 from the upper surface of the set plate 11 can be reduced, and the apparent volume of the housing 14 can be reduced.

  Other functions and effects of this embodiment are basically the same as those of the first embodiment.

  The present invention is not limited to the above-described embodiments, and a part of the configuration can be changed as appropriate without departing from the spirit of the invention. For example, the shape and arrangement of the plurality of wirings 25 may be changed, or the shape of the housing 14 may be changed.

Sectional drawing which concerns on 1st Embodiment and shows a fuel tank. Sectional drawing which concerns on 1st Embodiment and shows the control apparatus for fuel pumps. The top view which concerns on 1st Embodiment and shows a housing main body and a connector. The top view which shows the state which concerns on 1st Embodiment and removed the electronic component from the housing main body of FIG. FIG. 3 is an exploded cross-sectional view of the control device of FIG. 2 according to the first embodiment. The expanded sectional view which decomposes | disassembles and shows the connection relation of an electronic component and an extended wiring part concerning 1st Embodiment. Sectional drawing which concerns on 2nd Embodiment and shows the control apparatus for fuel pumps. The top view which concerns on 2nd Embodiment and shows a housing main body and a connector. The top view which concerns on 2nd Embodiment and shows the state which removed the electronic component from the housing main body of FIG. FIG. 8 is an exploded cross-sectional view of the control device of FIG. 7 according to the second embodiment.

Explanation of symbols

4 Fuel Pump 12 Control Device 13 Motor 14 Housing 15 Connector 16 Housing Body 17 Cover 21 IC (Integrated Circuit)
22 Electronic component 22a Connection terminal 23 Electronic component 23a Connection terminal 24 Electronic component 24a Connection terminal 25 Wiring 25a External terminal 25b Extension wiring part 25c Connection terminal 25d Recess 25e Bending part 31 Control device 32 Recessed part SW Width surface

Claims (6)

An integrated circuit for controlling the drive current supplied to the motor of the fuel pump;
Electronic components for removing electrical noise from the integrated circuit;
A housing for housing the integrated circuit and the electronic component;
A connector provided adjacent to the housing;
In a fuel pump control device comprising an external terminal provided in the connector and connected to an external wiring,
A plurality of wires formed of the same material including the external terminal and an extended wiring portion extending integrally from the external terminal;
The housing is formed integrally with the plurality of wires, and a part of the extended wiring portion is exposed from the housing, and the electronic component is supported and electrically connected to the exposed portion of the extended wiring portion. And a control device for a fuel pump. 2. The fuel pump control device according to claim 1, wherein each of the plurality of wirings is formed of a long plate material, and the plurality of extension wiring portions are arranged in the same direction so that the width surfaces face each other. 2. The electronic component is disposed between adjacent extension wiring portions, and adjacent extension wiring portions sandwiching the electronic component are bent in accordance with an outer shape of the electronic component. Or the control apparatus for fuel pumps of 2. 4. The fuel pump control device according to claim 1, wherein a concave portion for inserting the electronic component is provided in the housing, and at least a part of the electronic component is fitted into the concave portion. 5. . 5. The method according to claim 1, wherein a recess is formed in a portion of the extension wiring portion that is connected to the electronic component, and the connection terminal of the electronic component is engaged with the recess and connected. The fuel pump control device described. The said housing is provided with the cover which covers the said electronic component supported and connected to the said extension wiring part, The said integrated circuit was provided in the inner wall of the said cover, The Claim 1 characterized by the above-mentioned. Fuel pump control device.

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