JP5110099B2 - Fuel supply device - Google Patents

Description

  The present invention relates to a fuel supply device that supplies fuel to an internal combustion engine.

  Various electric devices are mounted on the vehicle, and it is necessary to reduce the power consumption of these electric devices as much as possible in order to improve the fuel consumption of the internal combustion engine.

  As an example of reducing the power consumption of the electric device, there is known an example in which a fuel supply device is provided with a control unit that controls electric power supplied to an electrically driven fuel pump (see Patent Document 1 and Patent Document 2). .

  The control unit finely controls the power supplied to the fuel pump according to the amount of fuel required by the internal combustion engine. As a result, the amount of fuel discharged from the fuel pump is controlled in accordance with the amount of fuel required by the internal combustion engine, so that the power consumption of the fuel pump is reduced.

  These fuel supply devices of Patent Documents 1 and 2 are so-called in-tank type fuel supply devices in which a fuel pump is installed in a fuel tank. These fuel supply devices include a fuel pump installed in the fuel tank, and a lid member that covers the hole formed in the fuel tank and supports the fuel pump. The control unit is mounted on the lid member.

  Since the controller generates heat during operation, it is necessary to dissipate heat generated by some method. In Patent Document 1, the lid member is provided with a case portion that accommodates the control portion, and a heat radiating plate for transmitting heat generated from the control portion to a metal fuel pipe. This heat radiating plate is embedded in the lid member.

  In Patent Document 2, the lid member is provided with a case portion that accommodates the control portion, and a heat dissipation lid that closes the opening of the case portion. The lid is attached to the case via a gasket and fastening means such as a screw. The gasket is for preventing intrusion of moisture or dust into a portion in which the control unit is accommodated.

Japanese Patent No. 3794879 Japanese Patent No. 4178354

  However, in patent document 1, the structure which forms the case part which accommodates a control part in a cover member is employ | adopted, and the resin-made cover plate which plugs up an opening part is attached to the case part. Thus, in this cover member, since the case part has the opening part opened upwards, the cover plate for protecting the control part accommodated in a case part is needed separately from a heat radiating member.

  On the other hand, in patent document 2, the cover for heat radiation is attached as what covers the opening part of the case part which accommodates a control part. The heat dissipation lid is attached to the case portion by a fastening means such as a screw through a gasket. In this Patent Document 2, a member having a heat dissipation effect is adopted as a member for closing the opening, but a fastening means is required to sandwich a gasket between the case portion and the lid or to fix both.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a fuel supply device including a lid member that can protect a control unit with a simple structure and is excellent in heat dissipation. That is.

The invention according to claim 1 is a fuel supply device that supplies fuel in a fuel tank to a fuel consuming device outside the fuel tank.
A resin lid member that covers a hole formed in the fuel tank, an electrically driven fuel pump that is installed in the fuel tank and sucks and discharges fuel in the fuel tank, and a fuel pump mounted on the lid member A control unit for controlling the power supplied to the radiating member, and a heat radiating member that is formed of a metal material having a higher thermal conductivity than the lid member and emits heat generated from the control unit,
The lid member is formed by insert molding in which a part of the heat radiating member is embedded, and the heat radiating member has an accommodating portion that forms an opening and accommodates the control unit inserted from the opening in contact with the inner wall surface. In the housing portion, at least the periphery of the opening portion is buried in the lid member as the buried portion, the opening portion is closed by the lid member, and the opening portion opens downward in the heat dissipation member, and the opening portion opens in the housing portion. An outer wall surface is formed at an end opposite to the portion, and the outer wall surface of the housing portion protrudes from a portion facing the outside of the fuel tank on the surface of the lid member .

  In this invention, since the heat radiating member has an accommodating portion that forms an opening and accommodates the control portion inserted from the opening in contact with the inner wall surface, the heat generated in the control portion is the heat radiating member. Absorbed and released. Furthermore, in this invention, at least the periphery of the opening part is embedded as a buried part in the lid member, and the opening part is closed by the lid member. For this reason, the control part accommodated in the accommodating part is isolated from the outside. Therefore, the controller can be protected with a simple structure without using a member for closing the opening. In addition, since the embedded portion is embedded in the lid member, the heat radiating member is firmly fixed to the lid member. Therefore, the fastening means for fixing the heat radiating member to the lid member is not required. As described above, according to the present invention, it is possible to provide a fuel supply apparatus including a lid member that can protect the control unit with a simple structure and is excellent in heat dissipation.

Moreover, in this invention, since the outer wall surface of the accommodating part protrudes from the surface of the lid member, the outer wall surface is outside air (air) outside the fuel tank or gas inside the fuel tank (mixed gas of air and evaporated fuel). ) Will increase the heat dissipation performance. Further, according to the present invention, since heat is released from the outer wall surface, it is not necessary to connect the heat radiating member to a fuel pipe or the like. That is, according to the present invention, the fixing position of the heat dissipation member with respect to the lid member can be set to an arbitrary position, and the degree of freedom in designing the lid member is increased. According to this invention, it can contribute to simplification of the structure of the lid member. Here, since the fuel pump is installed in the fuel tank, when the fuel pump is operated, the fuel is warmed and the temperature in the fuel tank rises. For this reason, the temperature in the fuel tank may be higher than the outside air temperature. In this invention, since the outer wall surface of the housing portion protrudes from the portion of the lid member that faces the outside of the fuel tank, the heat radiation performance can be improved compared to the case where the outer wall surface is installed in the fuel tank.

The invention according to claim 2 is characterized in that the heat radiating member protrudes outward from the embedded portion and has a protruding portion embedded in the lid member. In this invention, since the heat dissipation member has a protrusion protruding outward from the embedded portion, and the protrusion is embedded in the lid member, the surface area of the embedded portion is larger than when there is no protrusion. For this reason, the fixing strength between the lid member and the heat dissipation member is increased.

According to a third aspect of the present invention, the projecting portion extends along the axis of the fuel tank hole from the first projecting portion, the first projecting portion projecting in a direction intersecting the axis of the fuel tank hole from the buried portion. In the direction, it is characterized by comprising a buried protrusion and a second protrusion protruding at an interval.

  Here, the lid member may expand when heat received from the heat radiating portion or fuel vapor in the fuel tank permeates. In this application, the expansion of the member due to the penetration of the fuel is referred to as fuel swelling.

  On the other hand, the metal material generally does not easily penetrate the fuel as compared with the resin, and the fuel does not swell. Therefore, the expansion coefficient is smaller than that of the resin material. Further, the metal material has a smaller coefficient of thermal expansion than that of the resin material even in expansion due to heat. Therefore, the expansion rate of the metal material is smaller than that of the resin material even in the expansion due to heat. In this application, the rate at which the volume of the member expands due to heat or fuel swelling is referred to as the expansion rate. When a metal heat dissipating member is embedded in a resin lid member, the heat dissipating member is separated from the cover member due to the difference in expansion coefficient due to heat or fuel swelling, as described above, depending on the mode of embedding. There is a possibility that the fixing strength to the lid member is lowered.

  On the other hand, in this invention, the projection part consists of the 1st projection part and the 2nd projection part. The first protrusion protrudes from the embedded portion in a direction intersecting the axis of the fuel tank hole, and the second protrusion is embedded in the direction along the axis of the fuel tank hole from the first protrusion. It protrudes with a gap.

  According to the projecting portion configured as described above, the resin material of the lid member exists particularly between the heat dissipation member and the second projecting portion. For this reason, even if the lid member expands due to fuel or heat and the resin material in the vicinity of the protrusion attempts to move in a direction intersecting the axis of the hole, the protrusion protrudes in the direction along the axis of the hole. Therefore, the movement of the resin material in the vicinity of the protrusion in the above-described direction is hindered. Therefore, the fall of the fixed strength of the heat radiating member by the resin material of a cover member separating from the heat radiating member can be suppressed.

In particular, in the invention according to the third aspect, since it is possible to effectively suppress a decrease in the fixing strength of the heat radiating member with respect to the lid member as described above, the outer wall surface of the housing portion is protruded from the surface of the lid member. The structure of the invention described in claim 1 can be adopted. According to this, the heat dissipation performance can be enhanced while securing the fixing strength of the heat dissipation member to the lid member.

According to a fourth aspect of the present invention, the lid member is formed of a resin material having electrical insulation, and the lid member includes the first conductor member that electrically connects the control unit and the external device as the first housing. A first connector housed in the second housing and a second connector housed in the second housing for electrically connecting the control unit and the fuel pump to the lid member. The first housing and the second housing are integrally formed, and one end of the first conductor member is electrically connected to the control unit, and the other end is electrically connected to the external device in the lid member. In addition to being embedded, one end of the second conductor member is connected to the control unit, and the other end is embedded in the lid member so as to be electrically connected to the fuel pump.

  Here, in a fuel supply device of a type in which an electrically driven fuel pump is installed in a fuel tank, a connector having a conductor member for electrically connecting an external device and a control unit, a control unit and a fuel pump, And a connector having a conductor member for electrically connecting the two. In the fuel supply device according to any one of claims 1 to 5, in which the control portion is accommodated in the accommodation portion, it is conceivable that a connector that is electrically connected to an external device or a fuel pump is provided in the heat dissipation member. However, when a connector is provided on the heat dissipating member, an insulating connector housing that accommodates the conductor member is provided on the heat dissipating member, or an insulating member is provided on the heat dissipating member to ensure electrical insulation between the conductor member and the heat dissipating member. On the contrary, the number of parts of the lid member increases.

On the other hand, in the invention according to claim 4 , since the first connector and the second connector are provided on the lid member, the controller and the external device are electrically connected by the first conductor member of the first connector. The control part and the fuel pump can be electrically connected by the second conductor member of the second connector. Thus, the control unit can control the fuel pump installed in the fuel tank based on a command from the external device.

  Further, since the housing of each connector is formed integrally with the lid member, it is not necessary to provide the connector housing on the heat dissipating member. In addition, since each conducting wire member is embedded in a lid member made of an electrically insulating resin material, there is no need to separately provide a member that electrically insulates the conducting wire member from other components. Therefore, according to this invention, the structure of the heat radiating member becomes very simple, and an increase in the number of parts of the lid member can be suppressed.

According to the fifth aspect of the present invention, an adhesive layer is provided between the control unit and the inner wall surface of the housing unit, which is made of a silicone-based adhesive and adheres the control unit and the inner wall surface of the housing unit. It is characterized by that.

  If the control unit is simply fitted into the housing part of the heat radiating member and is fixed, a gap may be generated between the control unit and the heat radiating member due to a difference in expansion coefficient due to heat. If a gap is generated between the two, the heat transfer performance is degraded.

  Therefore, a form using an adhesive is conceivable as a method for firmly fixing the heat radiating member and the control unit. However, there are many types of adhesives. Typical adhesives include epoxy type and silicone type. Epoxy materials are hard and brittle when cured. On the other hand, silicone-based materials are generally more flexible than epoxy-based materials.

  In the present invention, a silicone-based adhesive is used as an adhesive for fixing the control unit to the inner wall surface of the housing unit. As described above, since the silicone-based adhesive has a property of being flexible, even if the heat dissipation member is heated by the control unit and the heat dissipation member expands, the adhesive layer can follow the expansion of the heat dissipation member. According to this action, generation | occurrence | production of the clearance gap between a control part and the inner wall face of an accommodating part is suppressed, and the fall of heat transfer performance can be suppressed.

It is explanatory drawing explaining the outline of the fuel supply system containing the fuel supply apparatus by one Embodiment of this invention. 1 is a schematic structural diagram of a fuel supply device according to an embodiment of the present invention. It is a perspective view of the flange by which FPC was mounted. It is a perspective view of FPC and a heat radiating member in FIG. It is sectional drawing of the VV line in FIG. It is sectional drawing of the VI-VI line in FIG. It is sectional drawing of the VII-VII line in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a fuel supply system 1 including a fuel supply device 6. The fuel supply system 1 is a system that supplies fuel in the fuel tank 2 to an internal combustion engine 10 that is a fuel consuming device.

  The fuel supply system 1 includes a fuel tank 2, a fuel supply device 6, a delivery pipe 7, a fuel injection valve 8, an electronic control device 9, and the like. The fuel supply device 6 sucks the fuel in the fuel tank 2 and discharges it toward the delivery pipe 7. A fuel injection valve 8 that supplies fuel to each cylinder (not shown) of the internal combustion engine 10 is connected to the delivery pipe 7. In this embodiment, the internal combustion engine 10 has four cylinders, and each fuel injection valve 8 is provided in each intake port (not shown) connected to each cylinder.

  In this embodiment, an example in which the fuel supply system 1 is applied to a so-called port injection type fuel supply system is described. However, so-called direct fuel in which fuel injected from a fuel injection valve is directly supplied to each cylinder is described. You may apply to an injection type system.

  The fuel supply device 6 includes a pump module 20 and a fuel pump controller (Fuel Pump Controller: FPC) 40 that controls the pump module 20. The pump module 20 sucks the fuel in the fuel tank 2, increases the pressure of the sucked fuel, and discharges the fuel toward the delivery pipe 7.

  The FPC 40 is supplied with electric power from the battery 11 and is supplied to an electrically driven fuel pump (hereinafter simply referred to as a fuel pump) 34 (see FIG. 2) installed in the fuel tank 2 provided in the pump module 20. To control the power. The structure of the fuel supply device 6 will be described in detail later.

  Specifically, the FPC 40 controls the power supplied to the fuel pump 34 by controlling the current value or voltage value supplied to the fuel pump 34. The amount of fuel discharged from the fuel pump 34 is controlled by controlling the power supplied to the fuel pump 34 by the FPC 40. The FPC 40 is electrically connected to an electronic control unit (ECU) 9 that controls the internal combustion engine 10.

  The ECU 9 sends a request signal to the FPC 40 so that the amount of fuel required by the internal combustion engine 10 can be secured, and supplies the fuel pump 34 corresponding to this request signal in order to secure the amount of fuel required by the internal combustion engine 10. The FPC 40 controls the power to be used. In this way, an amount of fuel required by the internal combustion engine 10 is sent from the fuel supply device 6 to the internal combustion engine 10.

According to this, since it is only necessary to operate the fuel supply device 6 according to the amount of fuel required by the internal combustion engine 10, the power consumption of the fuel pump 34 can be reduced as much as possible, and the power saving of the vehicle can be reduced. Can contribute. The ECU 9 grasps the operation state of the internal combustion engine 10 and the driver's request from detection signals of various sensors (not shown), and based on the grasped operation state and the driver's request, the injection amount of the fuel injection valve 8 and While controlling the injection timing, a signal corresponding to the amount of fuel required by the internal combustion engine 10 is transmitted to the FPC 40.
(Fuel supply device)
Next, the fuel supply device 6 will be described in detail. FIG. 2 shows a schematic configuration of the fuel supply device 6 according to the present embodiment. FIG. 3 shows the flange 22 on which the FPC 40 is mounted. FIG. 4 shows the FPC 40 and the heat dissipation member 44. FIG. 5 shows a cross section taken along line VV in FIG. 6 shows a cross section taken along line VI-VI in FIG. FIG. 7 shows a cross section taken along line VII-VII in FIG.

  The pump module 20 includes a flange 22 as a lid member, a sub tank 30, a fuel pump 34, a suction filter 35, a fuel filter 36, a pressure regulator 39, and the like. Parts other than the flange 22 are installed in the fuel tank 2.

  The flange 22 is a part formed in a disk shape that closes the hole 3 formed in a circle on the ceiling 4 of the fuel tank 2. The flange 22 is formed of a resin material such as POM (polyacetal) having excellent gasoline resistance and electrical insulation. The flange 22 includes a main body 24, a fuel supply pipe 25, a first connector 26, a second connector 27, and the like.

  The main body 24 protrudes radially outward from the outer peripheral portion of the disk portion located on the inner peripheral side of the hole portion 3 and the outer peripheral portion of the portion in a state where the hole portion 3 is closed, and on the outer surface of the fuel tank 2. It has a collar part supported by the part of the diameter direction outside.

  The fuel supply pipe 25 is a pipe member that supplies the fuel discharged from the fuel pump 34 to the internal combustion engine 10, and is formed integrally with the main body 24. As shown in FIG. 2, the fuel supply pipe 25 is formed so as to penetrate the main body 24 in the axial direction. A fuel pipe 12 is connected to an outer end 25 a that protrudes outside the fuel tank 2 in the fuel supply pipe 25, and a fuel hose 28 that communicates with the fuel pump 34 at an inner end 25 b that protrudes inside the fuel tank 2. Is connected. As a result, the fuel discharged from the fuel pump 34 can be supplied to the internal combustion engine 10.

  The first connector 26 is a connector that electrically connects the FPC 40 mounted on the flange 22 to the ECU 9 and the battery 11 that are external devices. The second connector 27 is a connector that electrically connects the FPC 40 and the fuel pump 34.

  As illustrated by a broken line in FIG. 2, an FPC 40 is embedded in the center of the main body 24. Further, the FPC 40 is embedded in the main body 24 in a state of being accommodated in a heat radiating member 44 described later. The heat radiating member 44 releases heat generated by the FPC 40. As shown in FIGS. 2 and 3, a part of the heat radiating member 44 protrudes from an outer surface 24 a located outside the fuel tank 2. Here, embedding means a state in which another member is embedded in a certain member and fixed by the certain member.

  Further, the main body portion 24 extends from the inner surface 24b of the main body portion 24 located inside the fuel tank 2 toward the bottom portion 5 of the fuel tank 2, and includes a sub tank 30 installed in the fuel tank 2, a flange 22, Two shafts 31 for connecting the two are provided. The two shafts 31 are provided at substantially equal intervals in the circumferential direction at the outer peripheral edge of the main body 24. The end on the flange 22 side is fixed by press-fitting to a press-fitting part provided in the main body part 24. The end on the sub tank 30 side is loosely inserted into the insertion hole formed in the insertion hole member 33. The insertion hole member 33 is provided in the sub tank 30.

  A coil spring 32 is provided on the outer periphery of each shaft 31. The end of the coil spring 32 on the flange 22 side is locked to the main body 24, and the end of the coil spring 32 on the sub tank 30 side is locked to the flange 22 side end surface of the insertion hole member 33. The coil spring 32 is engaged with the main body 24 and the end face of the insertion hole member 33 in a state where the coil spring 32 is compressed in the axial direction. According to this, the sub tank 30 is pressed against the bottom 5 of the fuel tank 2 with the flange 22 closing the hole 3.

  The sub tank 30 is a resin container formed in a bottomed cylindrical shape with an opening on the flange 22 side. The sub tank 30 accommodates a fuel pump 34, a fuel filter 36, a suction filter 35, and the like, and fuel in the fuel tank 2. To store. The sub tank 30 includes a jet pump (not shown) that pumps fuel around the sub tank 30 into the sub tank 30. The jet pump operates when a part of the fuel discharged from the fuel pump 34 is supplied. Thereby, while the fuel pump 34 is operating, the jet pump is operated, so that the sub tank 30 is filled with fuel.

  The fuel pump 34 is an electric drive type fuel pump, and includes an electric motor unit and a pump unit driven by the electric motor unit. The pump part forms an impeller directly connected to the rotor of the electric motor part and having a plurality of wing grooves on the outer peripheral edge, an arc-shaped pressure increasing flow path covering the wing grooves, and an inlet and a discharge opening communicating with the pressure increasing flow path And a pump case. The electric motor unit is electrically connected to the FPC 40 via the wiring 29 and the second connector 27, and rotates the rotor and the impeller with the controlled electric power supplied from the FPC 40.

  As the impeller rotates, the fuel sucked from the suction port is pressurized in the pressure increasing flow path and discharged from the discharge port. The discharged fuel passes through the inside of the electric motor portion, and is discharged toward the fuel filter 36 from the fuel discharge port provided at the upper end portion of the motor portion. The suction port provided at the lower end of the pump unit is provided with a suction filter 35 for filtering fuel sucked from the suction port. The suction filter 35 is a bag made of non-woven fabric made of resin fibers such as polyester or nylon, and is attached to the suction port.

  The fuel filter 36 is a filter that further filters the fuel discharged from the fuel pump 34. The fuel filter 36 includes a filter case 37 that covers the upper end of the fuel pump 34 and the outer periphery in the radial direction, a filter element 38 that filters the fuel discharged from the fuel pump 37, and the like. A housing portion 44 a for housing the filter element 38 is formed inside the filter case 37. A pressure regulator 39 that adjusts the pressure of the fuel filtered by the filter element 38 and discharges it toward the fuel hose 28 is provided outside the filter case 37 in the radial direction.

  The outline of the fuel supply device 6 has been described above. Next, the structure of the flange 22 on which the FPC 40 and the heat dissipation member 44 are mounted will be described in more detail.

  As shown in FIGS. 2 and 3, the FPC 40 and the heat radiating member 44 are mounted on the center portion of the flange 22. As shown in FIG. 4, the FPC 40 is accommodated in the accommodating portion 44 a of the heat dissipation member 44. The FPC 40 controls the power supplied to the fuel pump 34 in accordance with the instruction from the ECU 9 as described above, and is a hybrid IC in which a control IC, a power MOSFET (Metal Oxide Semiconductor Field Effect Transistor), etc. are housed in the same package. It is configured. In FIG. 4, conductor members 42 a to 42 d that are part of the first connector 26 that are electrically connected to the FPC 40 and conductor members 42 e and 42 f that are part of the second connector 27 are also illustrated. .

  The FPC 40 has four terminals 41 a, 41 b, 41 c, 41 d electrically connected to the ECU 9 and the battery 11, and two terminals 41 e, 41 f electrically connected to the fuel pump 34.

  The terminal 41a is a control terminal to which a request signal for the control IC from the ECU 9 is input. The terminal 41b is a diagnosis terminal for diagnosing the control IC by the ECU 9. The terminal 41 c is a power supply terminal that receives power from the battery 11. The terminal 41d is a grounding terminal that is grounded to a vehicle body or the like. The terminals 41 e and 41 f are power supply terminals for supplying power to the fuel pump 34.

  One end of each of the conductor members 42a to 42d of the first connector 26 is electrically connected to each of the terminals 41a to 41d by welding or the like (see FIGS. 4 and 5). The other ends of the conductor members 42a and 42b are electrically connected to the ECU 9 via electrical wiring (not shown). The other end of the conducting wire member 42c is electrically connected to the positive terminal of the battery 11 via electrical wiring (not shown). The other end of the conductor member 42d is electrically connected to the vehicle body via an electrical wiring (not shown).

  In addition, one end of each of the conductor members 42e and 42f of the second connector 27 is electrically connected to each terminal 41e and 41f by welding or the like (see FIGS. 4 and 6). The other end of the conducting wire member 42 e is electrically connected to the positive terminal of the fuel pump 34 via the electric wiring 29. The other end of the conducting wire member 42 f is electrically connected to the negative terminal of the fuel pump 34 via the electrical wiring 29.

  For example, the control IC performs switching control of the power MOSFET by PWM or the like according to a request signal from the ECU 9 input via the terminal 42a, for example, and controls the power supplied to the fuel pump 34. The FPC 40 supplies the controlled power to the fuel pump 34 through the terminals 42e and 42f. In the present embodiment, the rotational speed of the fuel pump 34 is adjusted in this way.

  As shown in FIG. 4, the heat radiating member 44 is formed in a box shape from a metal material having a relatively high thermal conductivity such as aluminum or an aluminum alloy. The heat dissipating member 44 is formed with an opening 44f opening on the flange 22 side and in a direction intersecting with the vertical direction of the fuel tank 2, and a concave housing portion 44a for housing the FPC 40 inserted from the opening 44f. (See FIGS. 4 to 7). The opening 44f has a size that allows the FPC 40 to pass therethrough.

  The FPC 40 is fixed to a bottom portion 44b located on the opposite side of the housing portion 44a from the flange 22 via an adhesive layer 44c made of a silicone-based adhesive. Thereby, FPC40 will be accommodated in the accommodating part 44a in the state which contacted the inner wall face of the accommodating part 44a. The term “contained in a contacted state” means a state in which heat can be transferred without substantially forming an air layer between the FPC 40 and the accommodating portion 44a. The state which has the contact bonding layer 44c between FPC40 and the accommodating part 44a like embodiment is also included. Moreover, each terminal 41a-41f is arrange | positioned so that it may protrude from the opening part 44f opened to the said crossing direction of the thermal radiation member 44. FIG.

  As shown in FIGS. 5 and 6, a resin portion 44 d is provided in the remaining space of the housing portion 44 a that houses the FPC 40. The resin portion 44d is a resin material different from the flange 22, and is made of, for example, PPS (polyphenylene sulfide). The resin portion 44d may be a POM. Thereby, the fixing strength of the FPC 40 to the heat radiating member 44 is further improved.

  The heat radiating member 44 has an outer wall surface 45 that protrudes from the outer surface 24 a in a state where the heat radiating member 44 is embedded in the flange 22 at the end opposite to the housing portion 44 a. Furthermore, a plurality of fins 46 extending upward are integrally formed on the outer wall surface 45.

  An embedded portion 47 embedded in the flange 22 is provided at least on the periphery of the opening 44f in the accommodating portion 44a (see FIG. 4). The peripheral edge of the opening 44f in the present embodiment means a portion on the outer peripheral side of the opening 44f and surrounding the opening 44f. Since the embedded portion 47 is embedded in the flange 22, the opening 44f is closed by the flange 22 (see FIG. 7). As a result, the FPC 40 and the heat dissipation member 44 are fixed to the flange 22 and the inside of the accommodating portion 44a is isolated from the outside.

  In addition, the embedded portion 47 is provided with two protruding portions 48 protruding outward. Each of the protrusions 48 includes a first protrusion 48a and a second protrusion 48b.

  As shown in FIGS. 4 and 7, the first protrusion 48 a protrudes from the embedded portion 47 in a direction intersecting the axis of the hole 3 of the fuel tank 2. The second protruding portion 48b protrudes from the first protruding portion 48a in the direction along the axis with a gap from the embedded portion 47. The first protrusion 48 a and the second protrusion 48 b are also embedded in the flange 22 in the same manner as the embedded portion 47.

  In the present embodiment, the first protrusion 48a protrudes from the embedded part 47 in a direction intersecting the axis of the hole 3, and the second protrusion 48b protrudes from the tip of the first protrusion 48a toward the fin 46. Yes. As shown in FIG. 7, the protrusion 48 is composed of a first protrusion 48 a and a second protrusion 48 b, so that when the embedded portion 47 is embedded in the flange 22, the embedded portion 47 and the second protrusion 48 b In between, the resin material of the flange 22 will enter. The length of the second protrusion 48b is such that it does not protrude from the outer surface 24a in a state where the embedded portion 47 is embedded.

  The FPC 40 and the heat dissipation member 44 have been described in detail above. Next, the flange 22 will be described in more detail.

  The first connector 26 provided on the flange 22 includes the above-described conductor members 42a to 42d and the first connector housing 26a. The second connector 27 includes conductor members 42e and 42f and a second connector housing 27a.

  As shown in FIGS. 3 and 5, the first connector housing 26 a is formed integrally with the main body portion 24 so as to protrude upward from the outer surface 24 a. The first connector housing 26a is formed in a cylindrical shape so as to expose the other ends of the conductor members 42a to 42d to the outside and to surround the conductor members 42a to 42d. Portions that are not exposed to the outside of the conductor members 42 a to 42 d are embedded in the main body 24.

  As shown in FIG. 6, the second connector housing 27a is formed integrally with the main body portion 24 so as to protrude downward from the inner surface 24b. The second connector housing 27a is formed in a cylindrical shape so that the other ends of the conductor members 42e and 42f are exposed to the outside and surround the conductor members 42e and 42f. Portions that are not exposed to the outside of the conductor members 42 e and 42 f are embedded in the main body 24.

  In the present embodiment, the flange 22 corresponds to the lid member described in the claims, and the FPC 40 corresponds to the control unit described in the claims. And the bottom part 44b in the accommodating part 44a of the thermal radiation member 44 is equivalent to the inner wall face as described in a claim. Further, the first connector housing 26a corresponds to the first housing described in the claims, and the second connector housing 27a corresponds to the second housing described in the claims. The conducting wire members 42a to 42d correspond to the first conducting wire member recited in the claims, and the conducting wire members 42e and 42f correspond to the second conducting wire member recited in the claims.

  The structure of the flange 22 has been described in detail above. Next, the operation of the fuel supply device 6 will be described.

  The FPC 40 receives a request signal from the ECU 9. The FPC 40 controls the power supplied to the fuel pump 34 in response to the request signal. The fuel pump 34 operates according to the supplied electric power, sucks the fuel filtered by the suction filter 35, pressurizes it, and discharges it toward the fuel filter 36. The discharged fuel is filtered by the fuel filter 36 and discharged toward the pressure regulator 39. The pressure regulator 39 adjusts the fuel pressure and discharges the pressure-adjusted fuel toward the fuel hose 28. The pressure-adjusted fuel is supplied to the internal combustion engine 10 via the fuel hose 28, the fuel supply pipe 25, the delivery pipe 7 and the fuel injection valve 8.

  Here, the FPC 40 generates heat when controlling the power supplied to the fuel pump 34. This heat is transmitted to the bottom portion 44b of the housing portion 44a of the heat dissipation member 44 through the adhesive layer 44c. Thereafter, the heat is transferred to the fins 46 formed on the outer wall surface 45, exchanges heat with the air outside the fuel tank 2, and is released to the outside air.

  Next, the manufacturing process of the flange 22 will be described. First, the FPC 40 is inserted from the opening 44f of the heat radiating member 44, and the FPC 40 is accommodated in the accommodating portion 44a. Thereafter, the FPC 40 is bonded to the housing portion 44 a of the heat radiating member 44 using a silicone-based adhesive. Next, the conductor members 42a to 42f are joined to the terminals 41a to 41f of the FPC 40 by welding or the like, respectively. As shown in FIG. 4, the conductor members 42 a to 42 f are bent so that the other end of the conductor member 42 is disposed in the first connector housing 26 a and the second connector housing 27 a when mounted on the flange 22. It has been.

  Next, the housing portion 44a that houses the FPC 40 is filled with a molten resin material that becomes the resin portion 44d by being cured. In this manner, a primary molded product in which the FPC 40 is accommodated in the heat dissipation member 44 is manufactured.

  In this embodiment, the flange 22 is manufactured by insert-molding the primary molded product. Specifically, the primary molded product is placed in a mold capable of forming the main body 24, the fuel supply pipe 25, the first connector housing 26a, and the second connector housing 27a, and filled with molten resin.

  Thus, the embedded portion 47 is embedded in the flange 22 so that the opening 44f of the accommodating portion 44a is closed, and the terminals 41a to 41f and part of the conductor members 42a to 42f are also embedded in the flange 22. In this way, the flange 22 on which the FPC 40 is mounted is manufactured.

  In the present embodiment, as described above, the embedded portion 47 of the heat dissipation member 44 is embedded in the flange 22, whereby the opening portion 44 f is closed by the flange 22. For this reason, FPC40 accommodated in the accommodating part 44a will be isolated from the exterior. Therefore, in this embodiment, the internal FPC 40 can be protected with a simple structure without using a member for closing the opening 44f. Further, since the embedded portion 47 is embedded in the flange 22, the heat radiating member 44 can be firmly fixed to the flange 22 without using fastening means or the like. According to the present embodiment, it is possible to provide the fuel supply device 6 including the flange 22 that can protect the FPC 40 with a simple structure and is excellent in heat dissipation.

  Moreover, in this embodiment, since the flange 22 which mounts FPC40 and the heat radiating member 44 is manufactured by insert molding, it can make it easy to raise the liquid-tightness and airtightness of the accommodating part 44a. For this reason, infiltration of moisture, dust and the like into the FPC 40 can be realized without a gasket.

  In addition, the outer wall surface 45 of the heat dissipation member 44 of the present embodiment protrudes from the main body portion 24. As a result, the outer wall surface 45 comes into contact with the outside air outside the fuel tank 2 or the mixed gas composed of the air inside the fuel tank 2 and the evaporated fuel, so that the heat radiation performance of the heat radiation member 44 is enhanced. Further, in the present embodiment, since a structure for radiating heat from the outer wall surface 45 is adopted, it is not necessary to connect a heat radiating member to a metal fuel pipe or the like as in the prior art. Therefore, the fixed position of the FPC 40 can be set to an arbitrary position. Since the freedom degree of design of the flange 22 increases, it can contribute to simplification of the structure of the flange 22.

  Further, in the present embodiment, the outer wall surface 45 is exposed outside the fuel tank 2. According to this, the heat dissipation of the heat radiating member 44 can be made higher than when exposed to the fuel tank 2. This is because the fuel in the fuel tank 2 is warmed by the operation of the fuel pump 34, and the temperature in the fuel tank 2 may rise above the outside air.

  In the present embodiment, a plurality of fins 46 are provided on the outer wall surface 45. According to this, since the surface area of the outer wall surface 45 can be increased, the heat dissipation performance of the heat dissipation member 44 can be enhanced.

  In addition, the heat radiating member 44 has a protrusion 48 protruding from the embedded portion 47. According to this configuration, the surface area of the portion embedded in the flange 22 of the heat radiating member 44 is larger than when the protrusion 48 is not provided. That is, the area of the flange 22 that contacts the resin material is increased. Therefore, the fixing strength of the heat radiating member 44 to the flange 22 is increased.

  In addition, since the protrusion 48 includes the first protrusion 48a and the second protrusion 48b, the flange 22 swells with fuel or expands with heat, and the resin material in the vicinity of the protrusion 48 is obtained. Even if it tries to move in the direction intersecting the axis of the flange 22, the movement of this portion is hindered by the second protrusion 48b. For this reason, the fall of the fixed strength of the heat radiating member 44 by the resin material of the flange 22 separating from the heat radiating member 44 can be suppressed.

  As described above, since the projecting portion 48 includes the first projecting portion 48a and the second projecting portion 48b, a decrease in the fixing strength of the heat dissipation member 44 can be effectively suppressed. For this reason, even if the outer wall surface 45 protrudes from the outer surface 24a of the flange 22 and the contact area between the heat radiating member 44 and the flange 22 is reduced, a decrease in the fixing strength of the heat radiating member 44 to the flange 22 can be suppressed. . According to these combinations, it is possible to achieve both the securing of the fixing strength of the heat radiating member 44 to the flange 22 and the improvement of heat dissipation.

  In the present embodiment, the first connector housing 26 a and the second connector housing 27 a are provided in the main body portion 24 having electrical insulation, and the conductor members 42 a to 42 f are embedded in the main body portion 24. For this reason, it is not necessary to provide the connector housing on the heat dissipation member 44. Further, it is not necessary to provide the heat radiating member 44 with an insulating member for electrically insulating the conductor member and the heat radiating member 44. For this reason, while being able to simplify the structure of the thermal radiation member 44, the increase in a number of parts can also be suppressed.

  Moreover, in this embodiment, the accommodating part 44a forms the opening part 44f opened toward a downward direction and a side. Each terminal 41a-41f is arrange | positioned so that it may protrude outside the accommodating part 44a from the opening part 44f of the accommodating part 44a. Thus, since the opening 44f having a very simple shape can be used as a passage for taking out the terminals 41a to 41f to the outside, it is possible to contribute to simplification of the configuration of the heat dissipation member 44.

  The FPC 40 is bonded to the housing portion 44a of the heat radiating member 44 with a silicone-based adhesive. According to this configuration, even if the outer surface of the FPC 40 and the heat radiating member 44 have different coefficients of thermal expansion, they can be absorbed even if they deviate from each other. According to this, the contact state between the FPC 40 and the heat dissipation member 44 via the adhesive layer 44c can be maintained. Thereby, the fall of the heat transfer performance by forming a clearance gap between both can be suppressed.

  Silicone adhesives are more flexible than, for example, epoxy adhesives. In the present embodiment, the above properties of the silicone-based adhesive are utilized. As described above, by using the silicone-based adhesive, even if the FPC 40 and the heat dissipation member 44 are displaced due to the heat generated by the FPC 40, these displacements can be absorbed.

  DESCRIPTION OF SYMBOLS 1 Fuel supply system, 2 Fuel tank, 6 Fuel supply apparatus, 7 Delivery pipe, 8 Fuel injection valve, 9 Electronic control unit (ECU), 10 Internal combustion engine, 11 Battery, 12 Fuel piping, 20 Pump module, 22 Flange (lid) Member), 24 body portion, 24a outer surface, 24b inner surface, 25 fuel supply pipe, 25a outer end portion, 25b inner end portion, 26 first connector, 26a first connector housing (first housing), 27 second connector 27a Second connector housing (second housing), 28 Fuel hose, 29 Wiring, 30 Sub tank, 31 Shaft, 32 Coil spring, 33 Insertion hole, 34 Fuel pump (electrically driven fuel pump), 35 Suction filter, 36 Fuel filter, 37 filter case, 38 fill 39, 39 pressure regulator, 40 fuel pump controller (FPC, controller), 41 controller, 41a-f terminals, 42a-d conductor member (first conductor member), 42e, f conductor member (second conductor member) ), 44 heat dissipation member, 44a accommodating portion, 44b bottom portion (inner wall surface), 44c adhesive layer, 44d resin portion, 45 outer wall surface, 46 fin, 47 embedded portion, 48 protrusion portion, 48a first protrusion portion, 48b second protrusion Part

Claims (5)

In the fuel supply device for supplying the fuel in the fuel tank to the fuel consuming device outside the fuel tank,
A resin lid member covering the hole formed in the fuel tank;
An electrically driven fuel pump installed in the fuel tank and sucking and discharging the fuel in the fuel tank;
A controller that is mounted on the lid member and controls the power supplied to the fuel pump;
A heat dissipating member that is formed of a metal material having a higher thermal conductivity than the lid member, and that releases heat generated from the control unit,
The lid member is formed by insert molding in which a part of the heat dissipation member is embedded,
The heat dissipating member includes an accommodating portion that forms an opening and accommodates the control unit inserted from the opening in contact with an inner wall surface, and at least a periphery of the opening is included in the accommodating portion. Embedded in the lid member as an embedded portion, the opening is closed by the lid member ,
In the heat dissipation member, the opening is opened downward,
An outer wall surface is formed at the end of the housing portion opposite to the opening,
The fuel supply device according to claim 1, wherein an outer wall surface of the housing portion protrudes from a portion facing the outside of the fuel tank on the surface of the lid member . 2. The fuel supply device according to claim 1, wherein the heat dissipating member protrudes outward from the embedded portion and has a protruding portion embedded in the lid member . The protruding portion protrudes from the buried portion in a direction intersecting the axis of the hole of the fuel tank, and extends in a direction along the axis of the hole of the fuel tank from the first protruding portion. The fuel supply device according to claim 2 , further comprising a second protrusion protruding from the embedded portion with a gap . The lid member is formed from a resin material having electrical insulation,
The lid member electrically connects a first conductor member that electrically connects the control unit and an external device in a first housing, and electrically connects the control unit and the fuel pump. The second conductor member has a second connector housed in the second housing;
The first housing and the second housing are integrally formed on the lid member, one end of the first conductor member is electrically connected to the control unit, and the other end is connected to the external device. The lid is embedded in the lid member so as to be electrically connected, and one end of the second conductor member is connected to the control unit, and the other end is electrically connected to the fuel pump. The fuel supply device according to any one of claims 1 to 3 , wherein the fuel supply device is embedded in a member . Between the control part and the inner wall surface of the housing part, an adhesive layer is provided which is made of a silicone-based adhesive and adheres the control part and the inner wall surface of the housing part. The fuel supply device according to any one of claims 1 to 4 .

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