JP2016188812A - Electronic control device and method for manufacturing electronic control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic control device which is provided with a sealing resin inside the casing and which makes detection with an atmospheric pressure sensor possible without increasing the number of components, and a method for manufacturing the electronic control device.SOLUTION: An electronic control device 20 comprises a circuit board 30 on which an atmospheric pressure sensor 30a is mounted, a bag-shaped casing 31 for accommodating the circuit board 30 and having an opening 41, and a connector 32 mounted on the circuit board 30 and closing up the opening 41. The electronic control device 20 is also equipped with a potting member 60 which, provided in an accommodation area, seals up the circuit board 30 without covering the atmospheric pressure sensor 30a, and which forms an inner space 31a together with the casing 31 in which the atmospheric pressure sensor 30a is disposed. Furthermore, the electronic control device 20 is equipped with a filter 30b that shuts off the flow of a liquid between the inner space 31a and the outside of the casing 31 while allowing the flow of a gas between the inner space 31a and the outside of the casing 31.SELECTED DRAWING: Figure 10

Description

  The present invention relates to an electronic control device in which a circuit board is provided in a bag-shaped housing whose opening is closed with a connector, and a method for manufacturing the electronic control device.

  Conventionally, as an example of an electronic control device, for example, one disclosed in Patent Document 1 is known.

JP 2014-180949 A

  By the way, although it is not a prior art, the electronic control device includes an atmospheric pressure sensor mounted on the circuit board and a filter for ventilating the inside and outside of the housing in order to detect the atmospheric pressure around the electronic control device. Can be considered. Moreover, although it is not a prior art, an electronic control apparatus can also consider sealing the inside of a housing | casing with sealing resin for the purpose of waterproofing a circuit board.

  However, the electronic control device has a problem that the atmospheric pressure cannot be accurately detected if the atmospheric pressure sensor or the filter is sealed with the sealing resin in the housing. For this reason, it is conceivable that the electronic control device processes the atmospheric pressure sensor with a protective case provided with a filter so that the atmospheric pressure sensor is not covered with the sealing resin. In this case, the electronic control device has a problem that a protective case is required and the number of parts increases.

  The present invention has been made in view of the above problems, and an electronic control device capable of performing detection with an atmospheric pressure sensor while providing a sealing resin in a housing without increasing the number of components, and a method for manufacturing the electronic control device The purpose is to provide.

In order to achieve the above object, the present invention provides:
A circuit board (30) on which the circuit element (30c) is mounted;
A housing (31) having a bag shape and having a bottom (40) on one end in the depth direction and an opening (41) on the other end, and containing a circuit board;
An electronic control device comprising a connector (32) mounted on a circuit board and closing an opening of a housing to electrically relay the circuit board and an external device,
An atmospheric pressure sensor (30a) mounted on a circuit board and provided in a housing area closed by a housing and a connector;
A sealing circuit that is provided in the housing area and seals the circuit board without covering the atmospheric pressure sensor, and forms an internal space (31a) in which the atmospheric pressure sensor is disposed together with at least one of the housing and the connector. Resin (60, 61);
A filter (30b) that is provided in a part of the housing and blocks a flow of liquid between the internal space and the outside while allowing a gas flow between the internal space and the outside of the housing; It is characterized by having.

  As described above, according to the present invention, the circuit board and the atmospheric pressure sensor are accommodated in the accommodation region in which the opening in the bag-shaped housing is closed by the connector. Further, the present invention is provided in this accommodation region and seals the circuit board without covering the atmospheric pressure sensor, and an internal space in which the atmospheric pressure sensor is arranged together with at least one of the housing and the connector. A sealing resin to be formed is provided. That is, the sealing resin seals the heating element together with the circuit board. Furthermore, the present invention includes a filter that blocks the flow of liquid between the internal space and the external environment while allowing the flow of gas between the internal space and the outside of the housing.

  For this reason, the atmospheric pressure sensor can detect the atmospheric pressure in the internal space through which gas can flow through the filter without being covered with the sealing resin. Therefore, the present invention eliminates the need to provide a protective case or the like for preventing the atmospheric pressure sensor from being covered with the sealing resin, that is, while providing the sealing resin in the housing without increasing the number of components. Can be detected with a barometric sensor.

Further features of the invention include
A circuit board (30) on which the circuit element (30c) and the atmospheric pressure sensor (30a) are mounted;
A housing (31) having a bag shape and having a bottom (40) on one end in the depth direction and an opening (41) on the other end, and containing a circuit board;
A connector (32) that is mounted on the circuit board and closes the opening of the housing to electrically relay the circuit board and the external device;
A filter (30b) that is provided in a part of the housing and blocks a liquid flow while allowing a gas flow;
A sealing resin (60, 61) provided in a part of a housing area closed by a housing and a connector, and a method of manufacturing an electronic control device comprising:
An accommodating step of closing an opening with a connector while accommodating a circuit board on which a circuit element, an atmospheric pressure sensor, and a connector are mounted in a housing;
A step of injecting the sealing resin into the storage region after the storage step, wherein the bottom of the storage region when the sealing resin is injected is below the position where the filter is formed and the atmospheric pressure sensor; and An injection step of injecting a sealing resin in a state where the circuit board is inclined at an acute angle with respect to the direction of gravity, and
In the injection step, the position at which the filter is formed and the atmospheric pressure sensor so as to form an internal space (31a) in which an atmospheric pressure sensor is arranged and gas flows between the outside of the housing through the filter. It is in the point which injects sealing resin, without reaching.

  Thus, according to the present invention, when the sealing resin is injected, the internal space is formed, and the sealing resin is injected without reaching the position where the filter is formed and the atmospheric pressure sensor. At this time, according to the present invention, the bottom of the housing region when the sealing resin is injected is located below the position where the filter is formed and the atmospheric pressure sensor, and the circuit board is at an acute angle with respect to the direction of gravity. Sealing resin is injected in an inclined state. Therefore, this invention can manufacture the electronic control apparatus provided with the atmospheric pressure sensor which can detect the atmospheric pressure of the internal space which is not covered with sealing resin and can distribute | circulate a gas with the exterior through a filter. Therefore, the present invention can manufacture an electronic control device that can detect with the atmospheric pressure sensor while providing the sealing resin in the housing without increasing the number of components. Further, the present invention injects the sealing resin in a state where the circuit board is inclined at an acute angle with respect to the direction of gravity, so that the sealing resin does not reach the position where the filter is formed and the atmospheric pressure sensor, and the inside of the accommodating area. It is easy to increase the volume of the sealing resin.

Further features of the invention include
A circuit board (30) on which the circuit element (30c) and the atmospheric pressure sensor (30a) are mounted;
A housing (31) having a bag shape and having a bottom (40) on one end in the depth direction and an opening (41) on the other end, and containing a circuit board;
A connector (32) that is mounted on the circuit board and closes the opening of the housing to electrically relay the circuit board and the external device;
A filter (30b) that is provided in a part of the housing and blocks a liquid flow while allowing a gas flow;
A sealing resin (60, 61) provided in a part of a housing area closed by a housing and a connector, and a method of manufacturing an electronic control device comprising:
An accommodating step of closing an opening with a connector while accommodating a circuit board on which a circuit element, an atmospheric pressure sensor, and a connector are mounted in a housing;
A process of injecting sealing resin into the storage area after the storage process, wherein the bottom of the storage area when injecting the sealing resin is below the position where the filter is formed and the atmospheric pressure sensor Then, an injection step of injecting a sealing resin,
Prior to the injection step, the gas flow by the filter is cut off, and after the injection step, the cutoff step to release the cutoff,
In the injection process, the injection amount of the sealing resin is adjusted based on the atmospheric pressure in the accommodation area, which is the detection result of the atmospheric pressure sensor, the atmospheric pressure sensor is disposed, and between the outside of the housing through the filter The sealing resin is injected without reaching the position where the filter is formed and the atmospheric pressure sensor so that the internal space (31a) through which gas flows is formed.

  Thus, according to the present invention, when the sealing resin is injected, the internal space is formed, and the sealing resin is injected without reaching the position where the filter is formed and the atmospheric pressure sensor. At this time, this invention inject | pours sealing resin in the state in which the bottom part of the accommodation area | region at the time of inject | pouring sealing resin has become the position where a filter is formed, and an atmospheric pressure sensor. Moreover, this invention interrupts | blocks the gas flow by a filter, adjusts the injection quantity of sealing resin based on the atmospheric pressure in the accommodating area | region which is a detection result of an atmospheric pressure sensor, and injects sealing resin.

  Thus, the present invention can manufacture an electronic control device including an atmospheric pressure sensor that can detect the atmospheric pressure in the internal space that is not covered with the sealing resin and that allows gas to flow outside through the filter. Therefore, the present invention can manufacture an electronic control device that can detect with the atmospheric pressure sensor while providing the sealing resin in the housing without increasing the number of components. Further, the present invention adjusts the injection amount of the sealing resin based on the atmospheric pressure in the accommodation area, which is the detection result of the atmospheric pressure sensor, and injects the sealing resin, so that the position where the filter is formed and the atmospheric pressure Without the sealing resin reaching the sensor, it is easy to increase the volume of the sealing resin in the accommodation region.

  The reference numerals in parentheses described in the claims and in this section indicate the correspondence with the specific means described in the embodiments described later as one aspect, and the technical scope of the invention is as follows. It is not limited.

It is a top view showing the schematic structure of the vehicles by which the electronic control unit of an embodiment is arranged. It is a top view which shows arrangement | positioning of an electronic control apparatus in an engine compartment. It is a perspective view which shows the electronic control apparatus arrange | positioned beside a battery and a battery. It is a top view which shows the electronic control apparatus arrange | positioned beside a battery and a battery. It is a top view which shows the electronic control apparatus arrange | positioned beside a battery and a battery. It is a perspective view which shows an electronic control apparatus. It is an expanded view which shows the structure of a bracket among electronic control apparatuses. It is a top view which shows the housing | casing in which the connector and the board | substrate were accommodated among electronic control apparatuses. It is a top view which shows the housing | casing in which the board | substrate was accommodated. It is sectional drawing which follows the XX line of FIG. It is an enlarged view of the junction part of the connector and housing | casing of FIG. It is sectional drawing which shows the manufacturing method of an electronic control apparatus. It is a figure which shows a thermal analysis result. It is a figure which shows a thermal analysis result. It is a perspective view which shows the electronic controller of the modification 1. It is sectional drawing which shows the electronic controller of the modification 2. FIG. 10 is a block diagram illustrating a manufacturing measure for an electronic control device according to Modification 2; 10 is a flowchart showing a method for manufacturing the electronic control device of Modification 2. It is a perspective view which shows the electronic controller of the modification 3. It is a top view which shows the electronic controller of the modification 3. It is a top view which shows the electronic controller of the modification 3. It is a top view which shows the electronic controller of the modification 3.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings shown below, common or related elements are given the same reference numerals. Further, the depth direction of the bag-shaped casing is the Z direction, the thickness direction of the casing orthogonal to the Z direction (the thickness direction of the circuit board) is the X direction, the Z direction and the X direction of the casing orthogonal to both directions. The width direction is indicated as the Y direction. In the following, the Y direction is also referred to as the horizontal direction, the Z direction as the vertical direction, and the X direction as the height direction.

  First, based on FIG.1 and FIG.2, an example of the mounting environment of the electronic control apparatus 20 of this embodiment is demonstrated. As shown in FIG. 1, the vehicle 10 has a hood 12 in front of the front windshield 11. The bonnet 12 is also referred to as a hood. A front fender 13 is attached to both sides of the bonnet 12 in the left-right direction of the vehicle in order to protect the occupant from unillustrated tires and splashes of stones, mud, water and the like. Further, headlights 14 are provided in front of the vehicle 10 on both the left and right sides. A front grille 15 is provided between the headlights 14 for taking in air from the outside.

  As shown in FIG. 2, an engine 18, a vehicle auxiliary machine, and the like are arranged in an engine compartment 17 below the hood 12 that is separated from a passenger compartment (cabin) in which an occupant is boarded by a partition wall 16. The engine compartment 17 is also referred to as an engine room. It can be said that the engine compartment 17 is a compartment and the bonnet 12 is a lid on the compartment. The engine compartment 17 is defined by a front fender 13, a front grill 15, a partition wall 16, and the like.

  In addition to the engine 18, the engine compartment 17 includes a battery 19, an electronic control unit 20, a relay box 21, and the like. The electronic control unit 20 is configured as an engine ECU (Electric Control Unit). The battery 19 can also be said to be a box-shaped member. The electronic control unit 20 executes calculation of a target torque that the engine 18 should output. Further, the electronic control unit 20 controls the opening degree of the throttle valve, the fuel injection amount, the ignition timing, and the like through the wire harness 22 in order to generate the target torque required by the engine 18. Further, the electronic control unit 20 detects the atmospheric pressure with an atmospheric pressure sensor 30a, which will be described later, because the atmospheric pressure changes due to a change in altitude and the intake air density of the engine changes while the vehicle 10 is traveling. Air-fuel ratio control of the engine is performed according to the detected value.

  The relay box 21 includes a large number of relays and fuses in order to distribute the power of the battery 19 to the electrical components in the vehicle. The relay box 21 is supplied with electric power to the electronic control device 20 through a part of the wire harness 23 or a control signal is input from the electronic control device 20. The electronic control unit 20 controls the supply of electric power to the electrical components mounted on the vehicle 10 by this control signal. The remainder of the wire harness 23 is connected to various body-type ECUs, meters, various switches, and the like (not shown) through through holes 16 a provided in the partition wall 16. As a result, signals can be exchanged between the electronic control unit 20 and the various ECUs and controlled objects of the body. In order to distinguish the wire harness 22 and the wire harness 23 from each other, the wire harness 22 can be referred to as an engine-side harness, and the wire harness 23 can be referred to as a relay-side harness.

  Next, the battery 19 and the electronic control unit 20 disposed next to the battery 19 will be described with reference to FIGS.

  The battery 19 is charged and discharged in order to control various electric devices and electronic devices. As shown in FIGS. 3 and 4, the battery 19 has a substantially rectangular parallelepiped shape, and as an outer surface, an upper surface 19 a on which terminals and the like (not shown) are formed, a long side surface 19 b and a short side surface 19 c which are side surfaces, And a bottom surface (not shown) opposite to the top surface 19a. The long side surface 19b is a side surface connected to the long side of the upper surface 19a having a substantially rectangular shape, and the short side surface 19c is a side surface connected to the short side of the upper surface 19a. The pair of long side surfaces 19b and the pair of short side surfaces 19c are both substantially flat surfaces, that is, flat portions 19d. The battery 19 is disposed on a bottom plate portion 55 that constitutes a tray portion 54 of the bracket 33 described later.

  The battery 19 is fixed to the tray portion 54 and eventually the vehicle 10. A clamp member 24 that clamps the battery 19 is disposed on the upper surface 19 a of the battery 19. The clamp member 24 is disposed so as to straddle the upper surface 19a along the short side direction in the vicinity of the center of the long side. As shown in FIGS. 3 and 5, both ends of the clamp member 24 are extended outward from the upper surface 19 a. J-shaped hook members 25 are connected to both ends of the clamp member 24. In the hook member 25, the lower end portion opposite to the connection end with the clamp member 24 is bent in a J-shape. Of the horizontal plate portions 56 and 57 constituting the tray portion 54 described above, a latching portion 59 is formed on the horizontal plate portion 57 disposed opposite to the long side surface 19b of the battery 19, and a hook is attached to the latching portion 59. The lower end portion of the member 25 is latched. As described above, the battery 19 is sandwiched between the bottom plate portion 55 and the clamp member 24.

  As shown in FIGS. 8, 9, 10 and the like, the electronic control unit 20 includes a circuit board 30, a housing 31, an atmospheric pressure sensor 30a, a filter 30b, a connector 32, a potting material 60, and the like. doing. Electronic components are mounted on the circuit board 30. Electronic components mounted on the circuit board 30 include an atmospheric pressure sensor 30a, a heating element 30c, and the like. That is, it can be said that the electronic control unit 20 includes the atmospheric pressure sensor 30a and the heating element 30c in addition to the components 30, 30b, 31, 32. Furthermore, in this embodiment, the electronic control device 20 in which the casing 31 is filled with the potting material 60 is employed.

  The circuit board 30 is obtained by forming a conductor pattern or the like on an insulating base material. As the circuit board 30, a printed board or a ceramic board can be adopted. The circuit board 30 is a flat board, for example. The circuit board 30 is a board whose mounting surface on which the atmospheric pressure sensor 30a and the like are mounted has a rectangular shape, for example.

  The heating element 30c is a semiconductor element that generates heat when operated, and an IGBT, a MOSFET, or the like can be employed. The atmospheric pressure sensor 30a outputs a detection signal indicating the atmospheric pressure as its detection result. In addition, since it is a well-known technique regarding the structure of the heat generating element 30c and the atmospheric pressure sensor 30a, detailed description is abbreviate | omitted.

  As shown in FIG. 10 and the like, the circuit board 30 is accommodated in the casing 31 and is fixed to the casing 31 by a potting material 60. In addition to the potting material 60, the circuit board 30 may be fixed to the housing 31 by fixing means (not shown). A connector 32 is also mounted on the circuit board 30. The connector 32 will be described later. Further, the circuit board 30 may be mounted with a circuit element such as an aluminum electrolytic capacitor in addition to the atmospheric pressure sensor 30a and the heating element 30c. In addition, the circuit board 30, the atmospheric pressure sensor 30 a, and the heating element 30 c are arranged in an accommodation area that is closed by the housing 31 and the connector 32.

  The casing 31 is formed using a metal material, that is, a metal as a main component, and functions to radiate the heat generated by the circuit board 30 to the outside of the casing 31. The heat generated by the circuit board 30 can be regarded as the heat generated mainly by the heating element 30c.

  As shown in FIG. 10 and the like, the casing 31 has a bag shape, and has a bottom 40 on one end side in the Z direction that is the depth direction of the casing 31 and an opening on the other end opposite to the bottom 40. 41. The housing 31 has a side wall portion 42 that is connected to the bottom portion 40 and forms a space for accommodating the circuit board 30 and the like together with the bottom portion 40. That is, the side wall part 42 is provided in an annular shape. In addition, since the bottom part 40 forms a part of wall part of the housing | casing 31 with the side wall part 42, it can also be called the bottom wall part 40. FIG.

  As shown in FIG. 10, the side wall portion 42 is partially formed with a through hole 42 a. The side wall portion 42 has a filter 30b attached to the through hole 42a. The filter 30b blocks a liquid flow while allowing a gas flow. More specifically, the filter 30b is provided in a part of the casing 31, and allows the gas to flow between the inner space 31a and the outside of the casing 31, which will be described later. The flow of liquid between the outside of 31 is interrupted. For this reason, the filter 30b can also be called a breathing filter. Note that the filter 30b having the above-described function is a well-known technique, and thus description thereof is omitted. The through hole 42a is also used as an injection port when the potting material 60 is injected.

  Since the electronic control unit 20 is provided with the filter 30b, it can be detected by the atmospheric pressure sensor 30a. Further, since the electronic control device 20 is provided with the filter 30b, the internal pressure of the internal space 31a generated by a temperature change or the like can be relieved. Furthermore, since the electronic control device 20 is provided with the filter 30b, stress applied to the waterproof seal member 32c, which will be described later, due to the cooling / heating cycle can be alleviated, and the durability can be improved as compared with the completely sealed electronic control device.

  The casing 31 having such a bag shape can be configured by a single member or can be configured by assembling a plurality of members. In this embodiment, the housing | casing 31 is comprised with the single member by employ | adopting the impact processing method using a punch. When the impact processing method is employed, the length in the X direction, that is, the thickness of the casing 31 can be reduced as compared with the assembly of a single member or a plurality of members using the aluminum die casting method.

  As shown in FIGS. 7, 8, 9, and 10, the casing 31 has a bottom surface 43 a that is an outer surface of the bottom portion 40 and a facing surface 43 b that is disposed to face the flat portion 19 d of the battery 19. And a back surface 43c opposite to the facing surface 43b, and a pair of connecting surfaces 43d that connect both ends of the facing surface 43b and the back surface 43c in the Y direction. The pair of connecting surfaces 43d is at least part of the Z direction and is inclined to the predetermined range in the X direction so that the distance between the pair of connecting surfaces 43d in the Y direction becomes narrower as the back surface 43c is approached. Respectively. It can also be said that the pair of inclined surface portions 43e are inclined so that the interval between the pair of inclined surface portions 43e gradually decreases from the opposing surface 43b to the back surface 43c. The pair of slope portions 43e are provided to face each other. The interval between the pair of connecting surfaces 43d is a distance in the Y direction from one connecting surface 43d to the other connecting surface 43d. The through hole 42a is provided not on the facing surface 43b side but on the back surface 43c side.

  In the present embodiment, the opposing surface 43b and the back surface 43c are substantially flat surfaces. And the connection surface 43d becomes the slope part 43e except the bending part which is a connection part with the opposing surface 43b and the back surface 43c. That is, almost the entire connection surface 43d is a slope portion 43e. For this reason, as shown in FIG. 9, the housing 31 has a substantially trapezoidal shape as viewed from the Z direction. Further, as shown in FIG. 9, a screw hole 44 having a predetermined depth that opens to the bottom surface 43a is formed in the bottom portion 40.

  As shown in FIGS. 3 and 4, the casing 31 configured in this manner is disposed next to (beside) one short side surface 19 c of the battery 19. More specifically, the housing 31 has a facing surface 43b opposed to the short side surface 19c. The housing 31 is disposed beside the short side surface 19c (plane portion 19d) so that the opening 41 is located above the bottom portion 40. That is, the connector 32 is disposed so as to be above the bottom portion 40.

  The connector 32 is mounted on the circuit board 30 and electrically relays the circuit board 30 and an external device. A part of the connector 32 is exposed to the outside from the housing 31 as shown in FIG. The connector 32 is fitted with a connector (female connector) on the external device side, and the circuit board 30 and the like are electrically connected to the wire harnesses 22 and 23 via the connector 32 and the female connector. For example, in the electronic control device 20, the circuit board 30 and the engine 18 are electrically connected via the connector 32, the female connector, and the wire harness 22. In the electronic control device 20, the circuit board 30 and the relay box 21 are electrically connected via the connector 32, the female connector, and the wire harness 23.

  As shown in FIGS. 10 and 11, the connector 32 includes a housing 32a formed using an electrically insulating material such as a resin, and a plurality of terminals formed using a conductive material and held by the housing 32a. 32b. The plurality of terminals 32b are, for example, arranged in the Y direction with respect to the housing 32a and arranged in multiple stages in the X direction. The number of stages is not particularly limited. The terminal 32b is electrically and mechanically connected to the circuit board 30.

  The connector 32 is disposed at and around the opening 41 of the housing 31 and closes the opening 41. The housing 32 a and the housing 31 are fitted around the opening 41. Further, a waterproof sealing material (not shown) is disposed between the housing 32a and the peripheral portion of the opening portion 41 in the side wall portion. Thereby, as for the electronic control apparatus 20, the internal space of the housing | casing 31 is waterproofing space. In FIG. 12, the terminals 32 b are inserted and mounted on the circuit board 30, but a surface mounting structure can also be adopted.

  Further, as shown in FIG. 11, the connector 32 closes the opening 41 in a state in which the waterproof seal member 32 c is provided over the entire circumference between the connector 32 and the housing 31. The connector 32 is provided with a waterproof seal member 32c, for example, over the entire outer peripheral surface of the housing 32a. That is, the waterproof seal member 32 c is an annular seal member and is disposed so as to surround the opening 41. As a result, the electronic control unit 20 can suppress moisture from entering the storage area formed by the housing 31 and the connector 32.

  As shown in FIG. 3, FIG. 6, FIG. 8, and the like, the housing 32a of the connector 32 has three ports (in other words, fitting ports). The connector 32 is an engine block in which a part of the three ports is provided for connection to the wire harness 22 for driving the engine 18. The connector 32 is a body block whose remaining ports are used for connection to the relay box 21 and the wire harness 23 corresponding to the body ECU. In the arrangement shown in FIG. 2, the wiring harnesses 22, 23 are arranged so that the engine block is closer to the engine 18 and the body block is closer to the relay box 21 and the through hole 16 a in the arrangement shown in FIG. 2. Considering this, the arrangement of each block is determined. Note that the number of ports of the connector 32 is not particularly limited.

  The potting material 60 is provided in the housing 31, that is, in the accommodation area. The potting material 60 corresponds to the sealing resin in the claims. The potting material 60 covers the circuit board 30 and the heating element 30c. The potting material 60 is provided for heat dissipation measures and vibration measures.

  As shown in FIG. 10, the potting material 60 seals the circuit board 30 without covering the atmospheric pressure sensor 30a. Further, the potting material 60 seals the circuit board 30 without covering the filter 30b. The potting material 60, together with the housing 31, forms an internal space 31a in which the atmospheric pressure sensor 30a is disposed. That is, the potting material 60 is provided not in the entire area of the accommodation area but in an area excluding the internal space 31a in which the atmospheric pressure sensor 30a is disposed. In other words, the potting material 60 fills the region excluding the internal space 31a in which the atmospheric pressure sensor 30a is disposed in the accommodation region. Further, as shown in FIG. 10, the potting material 60 has an imaginary plane along the boundary surface 60 a in contact with the internal space 31 a intersecting the circuit board 30 in an inclined state.

  In the electronic control unit 20, an internal space 31a is formed so that the potting material 60 does not cover the atmospheric pressure sensor 30a. For this reason, it is preferable for the electronic control device 20 to provide the atmospheric pressure sensor 30a at the corner of the circuit board 30 because it is easy to form the internal space 31a. For example, the atmospheric pressure sensor 30 a is provided at one of the four corners of the circuit board 30.

  Further, the potting material 60 employs a material having thermal conductivity in order to transmit the heat generated from the heating element 30 c to the housing 31. As the potting material 60, for example, a resin such as an epoxy resin, a urethane resin, a silicone resin, an acrylic resin, or an olefin resin can be used. The potting material 60 is preferably mixed with a filler such as silica, alumina, boron nitride, silicon nitride, silicon carbide, and magnesium oxide in a predetermined content ratio in order to further improve the heat dissipation. As a result, the electronic control unit 20 can improve heat dissipation as compared with the case where the potting material 60 is not provided.

  Further, the potting material 60 can improve the bonding strength of the bonding portion by sealing the heating element 30c, the aluminum electrolytic capacitor as other circuit elements, and the bonding portion between these circuit elements and the circuit board 30. That is, even if the electronic control device 20 is mounted in a vibrating environment, the bonding portion is sealed with the potting material 60, so that the bonding life can be improved. That is, it is preferable that the potting material 60 seals a heating element 30c, which is a circuit element that generates heat, or a joint where a crack or the like is generated in the joint with the circuit board 30 due to vibration.

  Here, the manufacturing method of the electronic control unit 20 will be described with reference to FIG. In this manufacturing method, first, the circuit board 30 on which the atmospheric pressure sensor 30a, the heating element 30c, and the connector 32 are mounted is accommodated in the housing 31, and the opening 41 is closed with the connector 32 (accommodating step). By this housing step, a structure without the potting material 60 is formed. Thus, the structure is a stage at the stage where the housing process is completed, and the circuit board 30 on which the atmospheric pressure sensor 30a, the heating element 30c, and the connector 32 are mounted is housed in the housing 31, and In this state, the opening 41 is closed by the connector 32. Furthermore, in this embodiment, the opening part 41 of the housing | casing 31 is plugged with the connector 32 in the state which has arrange | positioned the waterproof seal member 32c between the housing | casing 31 and the connector 32 at the time of an accommodation process.

  The electronic control unit 20 can be waterproofed with a potting material 60. However, in this manufacturing method, there is a concern that the potting material 60 may leak from between the housing 31 and the connector 32 during the injection process for a structure in a state as shown in FIG. Therefore, by providing the waterproof seal member 32c between the housing 31 and the connector 32 during the housing process, it is possible to suppress the potting material 60 from leaking between the housing 31 and the connector 32 during the injection process. That is, the waterproof seal member 32c can be said to be a temporary waterproof member in the structure. The waterproof seal member 32c is particularly effective when an injection process is performed on a structure in a state as shown in FIG.

  This manufacturing method performs the injection | pouring process which inject | pours the potting material 60 into an accommodation area | region after an accommodation process. In other words, the potting material 60 is potted in the accommodation area. In the injection process, the bottom of the accommodation region when the potting material 60 is injected is located below the position where the filter 30b is formed and the atmospheric pressure sensor 30a, and the circuit board 30 is at an acute angle with respect to the direction of gravity. It is performed in a tilted state. The implantation step is performed, for example, with the structure tilted as shown in FIG. Therefore, in the present embodiment, a portion where the housing 32a and the side wall portion 42 on the facing surface 43b side are in contact is the bottom portion. In this injection step, the place where the potting material 60 is injected can be controlled by changing the angle at which the structure is tilted. Therefore, in this manufacturing method, the potting material 60 can be formed at a place where the potting material 60 is desired to be formed. Further, the electronic control device 20 may have a second circuit board on which circuit elements and the like are mounted in a position facing the circuit board 30 in the housing 31. In such a case, the present manufacturing method is mounted on the second circuit board or the second circuit board without changing the angle at which the structure is tilted to cover the atmospheric pressure sensor 30a or the filter 30b with the potting material 60. Since it becomes easy to cover a circuit element with the potting material 60, it is preferable.

  In the present embodiment, the through hole 42 a provided in the housing 31 is used as an inlet for the potting material 60. That is, the through hole 42 a in which the filter 30 b is formed is used as an inlet for the potting material 60. Therefore, the filter 30b is not attached to the housing 31 during this injection process. Further, in the injection step, the potting material 60 is injected without reaching the position where the filter 30b is formed and the atmospheric pressure sensor 30a so that the internal space 31a is formed. When the injection of the potting material 60 is completed, the filter 30b is attached to the through hole 42a. In the present invention, the potting material 60 may be injected from an inlet different from the through hole 42a.

  The electronic control device 20 manufactured in this way is fixed to the bracket 33. The bracket 33 is a member for attaching the housing 31 in which the circuit board 30 is accommodated to the vehicle 10. In other words, the bracket 33 is a member for attaching the electronic control device 20 to the vehicle. That is, the electronic control device 20 is attached to the vehicle 10 via the bracket 33. Further, the electronic control device 20 may be provided with a heat transfer member between the housing 31 and the bracket 33 in order to dissipate its own heat from the housing 31 to the bracket 33.

  The bracket 33 has at least a metal interposition part 50 and a pair of metal leaf spring parts 51. The interposition part 50 is interposed between the flat part 19 d (short side surface 19 c) of the battery 19 and the facing surface 42 b of the housing 31. Since the interposition part 50 connects a pair of leaf | plate spring parts 51, it can also be called a connection part. Moreover, since the leaf | plate spring part 51 is each connected to the Y direction both ends, the interposition part 50 can also be called a base (base).

  The leaf spring portion 51 extends from the both ends of the interposition portion 50 in the Y direction toward the back surface 43c in the X direction, contacts with the slope portions 43e of the pair of connecting surfaces 43d, and reacts with the corresponding slope portions 43e due to spring deformation. Is granted. The connection method of the leaf | plate spring part 51 and the interposition part 50 is not specifically limited. The interposition part 50 and the leaf | plate spring part 51 may be comprised by another member, and may be connected by welding, for example. In the present embodiment, as shown in FIG. 7, the bracket 33 is configured by processing a flat metal plate into a predetermined shape. That is, the leaf | plate spring part 51 and the interposition part 50 are integrally connected as a part of the same metal plate. In FIG. 7, the boundary (connection part) between the interposition part 50 and the leaf | plate spring part 51 is shown with the broken line. The other boundaries are also indicated by broken lines.

  The leaf spring portions 51 are provided at both ends of the interposition portion 50 in the Y direction, and are bent to the opposite side of the interposition portion 50 from the battery 19. Specifically, the leaf spring portion 51 has an acute angle with the interposition portion 50 so as to contact the slope portion 43e of the housing 31. The leaf spring portion 51 has a bent portion (bent portion) at the connection end with the interposition portion 50, thereby contacting the corresponding slope portion 43 e and applying a reaction force due to spring deformation to the slope portion 43 e. Can be granted. That is, the leaf spring portion 51 is bent with respect to the interposition portion 50 so as to press the slope portion 43e. The pair of slope portions 43 e is pressed by the pair of leaf spring portions 51. For this reason, the housing 31 is fixed by the leaf spring portion 51. In other words, the electronic control device 20 is held (fixed) to the bracket 33 by the inclined surface portion 43e being pressed by the leaf spring portion 51. The leaf spring portion 51 can also be referred to as a fixed portion 51.

  In the present embodiment, as shown in FIGS. 3 and 4, the leaf spring portion 51 is connected to only a part of the interposition portion 50 in the Z direction. Specifically, in the Z direction, the leaf spring portion 51 is connected only to a portion within a predetermined range from the upper end of the interposition portion 50 from the upper end to the lower end, and is not connected to a partial range upward from the lower end. However, the leaf spring portion 51 may be connected from the upper end to the lower end of the interposition portion 50. The bending angle of the leaf spring part 51 with respect to the interposition part 50 is substantially constant in the Z direction.

  Further, the bracket 33 may be configured such that, for example, a protrusion is provided on a portion of the leaf spring portion 51 facing the slope portion 43e, and the protrusion comes into contact with the slope portion 43e. According to this, the contact area between the leaf spring portion 51 and the slope portion 43e can be reduced, and the housing 31 including the circuit board 30 and the connector 32 can be easily attached to the bracket 33. Note that when the casing 31 and the bracket 33 are fixed, the circuit board 30 is accommodated in the casing 31, and the connector 32 is mounted on the circuit board 30. Therefore, strictly speaking, the housing 31 including the circuit board 30 and the connector 32 and the bracket 33 are fixed. However, in the following, it will be shown that the casing 31 and the bracket 33 are simply fixed. It can also be said that the electronic control unit 20 and the bracket 33 are fixed.

  Furthermore, in this embodiment, as shown in FIGS. 3 and 6, the bracket 33 includes a support portion 52 and a tray portion 54. The support part 52 and the tray part 54 are connected to other parts constituting the bracket 33. As a constituent material of the support part 52 and the tray part 54, at least one of a metal material and a resin material can be adopted. The bracket 33 is formed by integrally forming the support portion 52 and the tray portion 54 of a resin material, and fixing a metal member having the interposition portion 50 and the leaf spring portion 51 to the formed member by, for example, press-fitting. You may connect. In addition, the bracket 33 is a metal having the interposition part 50, the leaf spring part 51, and the support part 52 by connecting the support part 52 formed using a metal material to either the interposition part 50 or the leaf spring part 51. The member may be press-fitted and fixed to the tray portion 54 formed of resin. Moreover, the bracket 33 may connect the support part 52 formed using the metal material and the tray part 54 formed using the metal material, for example, by welding. Furthermore, the bracket 33 may connect the support part 52 and the tray part 54 formed using a metal material to the interposition part 50 and the leaf spring part 51 by welding or the like.

  In the present embodiment, as described above, the bracket 33 is configured by processing a flat metal plate into a predetermined shape. That is, not only the interposition part 50 and the leaf | plate spring part 51 but the support part 52 and the tray part 54 are comprised as a part of the same metal plate.

  As shown in FIGS. 3, 5, and 6, the support portion 52 supports the bottom portion 40 of the housing 31. In the present embodiment, a through hole 53 for screwing the housing 31 is formed in the support portion 52. 5 is fixed to the support portion 52 by inserting the screw 34 shown in FIG. 5 through the through hole 53 and screwing into the screw hole 44 formed in the bottom portion 40 of the housing 31.

  Moreover, the support part 52 is connected with the bottom plate part 55 which comprises the tray part 54, as shown in FIG.5 and FIG.7. In FIG. 7, the boundary between the support portion 52 and the bottom plate portion 55 is indicated by a broken line. The support portion 52 is an end portion in the X direction of the bottom plate portion 55 and is connected to the vicinity of both ends in the Y direction. The support portion 52 overlaps the vicinity of both ends in the Y direction at the bottom portion 40 of the housing 31 in the projection view from the Z direction.

  The tray portion 54 is a portion of the bracket 33 where the battery 19 is disposed. The tray portion 54 has a bottom plate portion 55 and horizontal plate portions 56 and 57. It can be said that the bottom plate portion 55 is a support portion and the horizontal plate portion 57 is a reinforcement portion. In the present embodiment, the bottom plate portion 55 and the horizontal plate portions 56 and 57 are also configured as part of the metal plate that constitutes the interposition portion 50, the leaf spring portion 51, and the support portion 52. That is, in the present embodiment, the bottom plate portion 55 and the horizontal plate portions 56 and 57 are configured as a part of the same metal plate. However, the bottom plate portion 55 and the horizontal plate portions 56 and 57 can be separate members. Furthermore, the horizontal plate portion 56 and the horizontal plate portion 57 may be separate members.

  The bottom plate part 55 supports the battery 19. The bottom plate portion 55 has a rectangular shape (rectangular shape) corresponding to the battery 19 in the shape of the XY plane. As described above, the support portion 52 is connected to one end of the bottom plate portion 55 in the X direction, that is, one of the end portions corresponding to the short side surface 19 c of the battery 19. Further, the bottom plate portion 55 is connected to the lower end of the interposition portion 50 between the two support portions 52 at the end where the support portion 52 is connected. The support portion 52 is located on the same plane as the bottom plate portion 55 and extends from the bottom plate portion 55 in the X direction. That is, the support portion 52 is not bent with respect to the bottom plate portion 55. On the other hand, the interposition part 50 is bent with respect to the bottom plate part 55 so that the angle formed with the bottom plate part 55 is approximately 90 degrees.

  The bottom plate portion 55 has a fixing hole 58 formed so as to penetrate near the center. With the fixing hole 58, the bracket 33, that is, the electronic control unit 20, is screwed to the body of the vehicle 10 or an attachment portion fixed to the body. Note that the fixed portion of the electronic control device 20 to the vehicle 10 is not limited to the bottom plate portion 55. The electronic control unit 20 can be fixed at other portions of the bracket 33. Further, the electronic control device 20 can be fixed to an attachment portion such as a radiator support via the clamp member 24.

  The horizontal plate portion 56 is connected to the end portion of the bottom plate portion 55 opposite to the end portion to which the interposition portion 50 and the support portion 52 are connected. The horizontal plate portion 56 has a rectangular shape (rectangular shape) on the YZ plane, and has the same length as the bottom plate portion 55 in the Y direction. The horizontal plate portion 56 is bent with respect to the bottom plate portion 55 so that the angle formed with the bottom plate portion 55 is approximately 90 degrees. As shown in FIG. 6, the interposition part 50 and the horizontal plate part 56 face each other.

  The pair of horizontal plate portions 57 is connected to the end portion in the Y direction of the bottom plate portion 55, that is, the end portion corresponding to the long side surface 19 b of the battery 19. The pair of horizontal plate portions 57 are bent with respect to the bottom plate portion 55 so that the angle formed with the bottom plate portion 55 is approximately 90 degrees. The pair of horizontal plate portions 57 face each other. One end of the horizontal plate portion 57 in the X direction is connected to an end portion of the horizontal plate portion 56 in the Y direction, for example, by welding.

  Moreover, as shown in FIG. 6, the other end of the X direction in the horizontal plate part 57 is connected with the edge part of the Y direction in the interposition part 50, for example by welding. That is, the lateral plate portion 57 extends to the opposite side of the leaf spring portion 51 in the X direction with respect to the interposition portion 50. The facing interval between the pair of horizontal plate portions 57 is held by the interposition portion 50 and the horizontal plate portion 56. Since the bracket 33 surrounds the periphery of the bottom plate portion 55 by the interposition portion 50 and the horizontal plate portions 56 and 57, the positioning of the battery 19 is easy and the displacement of the battery 19 can also be suppressed.

  However, the lateral plate portion 57 can also be connected to the leaf spring portion 51 by welding, for example. In this case, the electronic control device 20 can be made thinner in the X direction by the thickness of the horizontal plate portion 57 than in the configuration shown in FIG.

  The height in the Z direction of the horizontal plate portion 57 is substantially the same as that of the horizontal plate portion 56 in a predetermined range in the X direction from the connecting end with the horizontal plate portion 56, specifically, in a range from the vicinity of the center in the X direction. It is height. On the other hand, at the end on the interposition part 50 side, the height of the horizontal plate part 57 is substantially the same as that of the interposition part 50. The height of the horizontal plate portion 57 gradually increases from the vicinity of the center in the X direction toward the end portion on the interposed portion 50 side. Thus, the height of the horizontal plate portion 57 is higher on the side closer to the circuit board 30 in the X direction. Further, the horizontal plate portion 57 is formed with a latching portion 59 around which the J-shaped lower end portion of the hook member 25 is latched near the center in the X direction.

  Next, a procedure for assembling the electronic control device 20 to the vehicle 10 will be described with reference to FIG.

  First, the main wire including the relay box 21 and the wire harness 23 is arranged in the engine compartment 17.

  Next, the engine module is installed in the engine compartment 17 from the lower side of the vehicle 10. The engine module is constructed by assembling the engine 18 with auxiliary equipment such as a starter, alternator and compressor, a drive system such as a transmission and a drive shaft, a braking system such as a shock absorber and a brake rotor, and an intake and exhaust system excluding an air cleaner. is there. Further, in addition to these, the engine module may be assembled with an engine mounting component, an under cover, and a wire harness 22.

  Next, the remaining parts such as the remaining wire harness excluding the main wire and the wire harness 22, the air cleaner, the electronic control unit 20, and the battery 19 are assembled. That is, the battery 19 and the electronic control unit 20 are assembled between the engine 18 and the relay box 21 with the engine 18 and the relay box 21 already arranged.

  At that time, the housing 31 is disposed beside the short side surface 19 c of the battery 19 so that the connector 32 is positioned above the bottom 40 of the housing 31. Then, the electronic control device 20 (bracket 33) is assembled to the body of the vehicle 10 or an attachment portion fixed to the body, and then the battery 19 is disposed on the bottom plate portion 55 of the bracket 33. Then, the female connector on the external device side is fitted into the connector 32. Thereby, the wire harnesses 22 and 23 are connected to the circuit board 30. The female connector can be fitted before the battery 19 is arranged.

  Next, effects of the electronic control device 20 described above will be described.

  In the present embodiment, the connecting surface 43d of the housing 31 is not a surface along the X direction, but the distance between the pair of connecting surfaces 43d in the Y direction becomes narrower as at least a part of the connecting surface 43d approaches the back surface 43c. It is set as the slope part 43e which inclines so that it may become. That is, in the present embodiment, the casing 31 is not substantially rectangular when viewed from the Z direction, but the distance between the pair of connection surfaces 43d in the Y direction increases as the back surface 43c approaches at least a part of the connection surface 43d. It is set as the slope part 43e which inclines so that it may become narrow.

  At the same time, in the present embodiment, a metal leaf spring portion 51 is provided on the bracket 33 so as to come into contact with the slope portions 43e of the pair of connecting surfaces 43d and to apply a reaction force due to spring deformation to the slope portions 43e. . When a reaction force due to spring deformation acts on the slope portion 43e, the slope portion 43e is pushed to the opposite slope portion 43e side in the Y direction and to the intervention portion 50 side in the X direction. That is, both ends of the housing 31 in the Y direction are pushed toward the interposition part 50 in the X direction. And the housing | casing 31 is clamped by the leaf | plate spring part 51 and the interposition part 50. FIG. In this way, the housing 31 can be fixed to the bracket 33. Therefore, compared to the conventional structure, for example, a structure in which the bracket is screwed to the housing in the X direction, or a structure in which the connecting surface is not a slope but a surface along the thickness direction, and the bottom surface and the back surface are sandwiched and fixed by the bracket. The electronic control unit 20 can be thinned. Moreover, since it fixes by holding, fixing structure can be simplified.

  Since the electronic control unit 20 can be thinned as described above, the electronic control unit 20 can be arranged in a narrow space next to the flat portion 19d of the battery 19, that is, the side of the battery 19, in the engine compartment 17 where the mounting space is limited. . Thereby, the position of the bonnet 12 positioned above the engine compartment 17 can be lowered as compared with the configuration in which the electronic control device is disposed under the battery. Therefore, the center of gravity position of the vehicle 10 can be lowered. Moreover, the design property can also be improved. In this embodiment, since the electronic control unit 20 is disposed in the engine compartment 17, the visibility (parting) of the driver can be further improved.

  Further, the opening 41 of the housing 31, in other words, the connector 32 is arranged so as to be above the bottom 40. Therefore, it is not necessary to route the wire harness from the lower side to the upper side as in the configuration in which the electronic control device is arranged under the battery. Therefore, the length of the wire harnesses 22 and 23 can be shortened.

  As described above, according to the present embodiment, in the electronic control device 20 arranged next to the battery 19, the position of the bonnet 12 on the engine compartment 17 is increased while suppressing the wire harnesses 22 and 23 from becoming longer. Can be suppressed.

  Further, the heat of the circuit board 30 is transmitted to the interposition part 50 and the leaf spring part 51 through the metal casing 31. Therefore, the heat of the circuit board 30 can be efficiently radiated by the metallic interposition part 50 and the leaf spring part 51. Further, the lower part of the engine compartment 17 is filled with heat, and the temperature is higher than that of the upper part. Therefore, the heat of the circuit board 30 can be radiated more efficiently than the configuration in which the electronic control device is disposed under the battery.

  In the electronic control device 20, the circuit board 30 and the atmospheric pressure sensor 30 a are accommodated in an accommodation area in which the opening 41 in the bag-shaped housing 31 is closed by the connector 32. The electronic control device 20 is provided in this accommodation area, and seals the circuit board 30 on which the heat generating element 30c is mounted without covering the atmospheric pressure sensor 30a, and includes at least a housing 31 and a connector 32. Along with this, a potting material 60 that forms the internal space 31a is provided. That is, the potting material 60 covers the heating element 30 c together with the circuit board 30. Further, the electronic control unit 20 includes a filter 30b that blocks the flow of liquid between the internal space 31a and the outside while allowing the flow of gas between the internal space 31a and the outside of the housing 31. Yes.

  For this reason, the atmospheric pressure sensor 30a can detect the atmospheric pressure of the internal space 31a through which the gas can flow through the filter 30b without being covered with the potting material 60. Therefore, the electronic control device 20 does not need to provide a protective case or the like for preventing the atmospheric pressure sensor 30a from being covered with the potting material 60, that is, without increasing the number of components, the potting material 60 in the casing 31. Can be detected by the atmospheric pressure sensor 30a.

  Furthermore, since the electronic control unit 20 includes the waterproof seal member 32c, there may be components (such as the atmospheric pressure sensor 30a) that are not covered with the potting material 60 in the housing 31. In addition, since the electronic control device 20 has the atmospheric pressure sensor 30 a disposed at the corner of the circuit board 30, the area where the potting material 60 is formed can be increased. Similarly, the electronic control unit 20 can suppress an increase in the internal space 31a more than necessary. That is, in the electronic control unit 20, the potting material 60 is formed in as wide an area as possible without sealing the atmospheric pressure sensor 30a and the filter 30b with the potting material 60.

  Further, in this manufacturing method, when the potting material 60 is injected, the internal space 31a is formed, and the potting material 60 is injected without reaching the position where the filter 30b is formed and the atmospheric pressure sensor 30a. At this time, according to the present manufacturing method, the bottom of the accommodation region when pouring the potting material 60 is located below the position where the filter 30b is formed and the atmospheric pressure sensor 30a, and the circuit board 30 is in the direction of gravity. On the other hand, the potting material 60 is injected in a state inclined at an acute angle.

  Therefore, the present manufacturing method is not covered with the potting material 60, and the electronic control device 20 includes the atmospheric pressure sensor 30a that can detect the atmospheric pressure of the internal space 31a through which the gas can flow through the filter 30b. Can be manufactured. Therefore, this manufacturing method can manufacture the electronic control apparatus 20 which can detect with the atmospheric pressure sensor 30a, providing the potting material 60 in the housing | casing 31, without increasing a number of parts. Further, in this manufacturing method, the potting material 60 is injected in a state where the circuit board 30 is inclined at an acute angle with respect to the direction of gravity. For this reason, the potting material 60 does not reach the position where the filter 30b is formed and the atmospheric pressure sensor 30a, and the volume of the potting material 60 in the accommodation region can be easily increased.

  Furthermore, in this embodiment, the shape of the housing | casing 31 is made into trapezoid shape seeing from a Z direction. That is, the substantially entire surface of the connecting surface 43d is a slope portion 43e. According to such a configuration, it is easy to fix the housing 31 and the bracket 33. For example, in a state where the pair of leaf springs 51 is slightly opened by applying an external force, the housing 31 is moved to a predetermined position in the Z direction, and then the application of the external force is canceled, so that the housing 31 and the bracket 33 Can be fixed. In addition, the connecting surface 43d has the inclined surface 43e only in a part thereof, and the housing 31 can be easily formed as compared with the configuration in which the remaining part is along the X direction. If the angle between the leaf spring portion 51 and the interposition portion 50 is reduced within a predetermined range from the upper end toward the lower end, the casing 31 can be moved to a predetermined position without applying external force. Can be moved. Further, as described above, even if a protrusion such as a wedge shape or a hemisphere is provided on the contact surface side of the leaf spring portion 51, the housing 31 can be moved to a predetermined position without applying an external force.

  Furthermore, in the present embodiment, the bracket 33 has a support portion 52, and the housing 31 is supported by the support portion 52. Therefore, it is possible to prevent the casing 31 from being displaced downward with the application of vehicle vibration. That is, the housing 31 can be fixed more stably. In particular, in the present embodiment, a through hole 53 is formed in the support portion 52, and the housing 31 is screwed to the support portion 52 through the through hole 53. As described above, since the screw is fastened under the bottom portion 40 of the housing 31, it is difficult to remove the housing 31 from the bracket 33, that is, the vehicle 10. Therefore, it is possible to prevent the housing 31 including the circuit board 30 from being taken out (for example, stolen) from the engine compartment 17. In particular, in the present embodiment, since the support portion 52 is formed using a metal material, the heat of the circuit board 30 is also transmitted to the support portion 52 through the bottom portion 40 of the metal casing 31. Therefore, the heat of the circuit board 30 can be radiated efficiently.

  Furthermore, in the present embodiment, the bracket 33 has a horizontal plate portion 57. The lateral plate portion 57 is connected to the interposed portion 50 or the leaf spring portion 51 and extends in a direction opposite to the direction in which the leaf spring portion 51 extends from the interposed portion 50. Therefore, it is possible to suppress the leaf spring portion 51 and the interposition portion 50 from falling due to the weight of the circuit board 30 and the casing 31. That is, the housing 31 including the circuit board 30 can be stably held by the side of the battery 19. Particularly in this embodiment, since the horizontal plate portion 57 is formed using a metal material, the heat of the circuit board 30 is also transmitted to the horizontal plate portion 57. Thus, the thermal mass of the entire bracket 33 is increased, and the heat of the circuit board 30 can be radiated more effectively. The thermal mass indicates a volume capable of absorbing heat.

  Further, in the present embodiment, the bracket 33 has the bottom plate portion 55 and can support the battery 19. In particular, in the present embodiment, since the bottom plate portion 55 is formed using a metal material, the heat of the circuit board 30 is also transmitted to the bottom plate portion 55. Thus, the thermal mass of the entire bracket 33 is increased, and the heat of the circuit board 30 can be radiated more effectively. In other words, in the present embodiment, the horizontal plate portion 57 and the bottom plate portion 55 can be used as a heat dissipation path for the heat propagated to the bracket 33.

  In the present embodiment, the tray portion 54 is configured including the bottom plate portion 55 and the horizontal plate portion 57, and the battery 19 can be supported by the bracket 33 in addition to the housing 31. In particular, in this embodiment, the interposition part 50, the leaf spring part 51, the support part 52, and the components (the bottom plate part 55, the lateral plate parts 56, 57) of the tray part 54 that supports the battery 19 are the same metal plate. Is configured as part of Therefore, the configuration of the bracket 33 including the tray portion 54 can be simplified. Further, the heat of the circuit board 30 can be radiated to the entire tray portion 54. In other words, in the present embodiment, the tray portion 54 can be used as a heat dissipation path for the heat propagated to the bracket 33.

  13 and 14 show thermal analysis results (simulation results). In FIG. 14, the battery 19 is omitted for convenience. As shown in FIGS. 13 and 14, most of the heat generated by the circuit board 30 is absorbed by the interposition part 50 and the leaf spring part 51. Further, a part of the signal is transmitted to the bottom plate portion 55 and the horizontal plate portion 57 constituting the tray portion 54 through the interposition portion 50 and the leaf spring portion 51. By including the tray portion 54 in the bracket 33, it can be seen that there is room as a thermal mass. That is, even if heat is transferred to the tray portion 54, the temperature of the battery 19 does not change greatly.

  Furthermore, in this embodiment, the housing | casing 31 of the electronic control apparatus 20 is arrange | positioned beside the battery 19 as a box-shaped member. In the engine compartment 17, the battery 19 is disposed not in the vicinity of the engine 18 but in a place where the temperature from the front grill 15 is low. Therefore, the temperature rise of the circuit board 30 can be effectively suppressed by arranging the circuit board 30 beside the battery 19.

  By the way, it is also possible to arrange | position the housing | casing 31 next to the long side surface 19b among the side surfaces of the battery 19. FIG. However, if arranged next to the long side surface 19b, the wire harnesses 22 and 23 must be routed so as to avoid the hook member 25. For this reason, the length of the wire harnesses 22 and 23 becomes long. In addition, a space for wiring is required. On the other hand, in this embodiment, since the housing | casing 31 is arrange | positioned next to the short side surface 19c of the battery 19, the length of the wire harnesses 22 and 23 can also be shortened by this.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Below, the modification of this invention is demonstrated. The above-described embodiments and modification examples can be implemented independently, but can be implemented in combination as appropriate. The present invention is not limited to the combinations shown in the mode for carrying out the invention, and can be implemented in various combinations.

(Modification 1)
In this modification, the description of the parts common to the electronic control device 20 shown in the above embodiment is omitted.

  As shown in FIG. 15, the electronic control device 20 of the present modification is mounted via a heat insulating member 70 for suppressing heat transfer with the battery 19 in addition to the configuration of the above embodiment. In FIG. 15, for the sake of convenience, the battery 19 is simplified, and the clamp member 24, the hook member 25, and the latching portion 59 are not shown. Further, the leaf spring portion 51 is connected from the upper end to the lower end of the interposition portion 50.

  As the heat insulating member 70, a well-known member applied to the vehicle 10, for example, a hollow sheet made of polypropylene can be employed. Of the portions of the battery 19 and the bracket 33 that face each other, the heat insulating member 70 is disposed at least between the flat surface portion 19 d and the interposition portion 50. The heat insulating member 70 can be arranged on five surfaces excluding the upper surface 19a with respect to the battery 19 having a substantially rectangular parallelepiped shape. In the present modification, the heat insulating member 70 is disposed on the side surfaces 19 b and 19 c and the five surfaces of the bottom surface of the battery 19. Specifically, heat insulation is provided between the interposition portion 50 and the short side surface 19c, between the pair of horizontal plate portions 57 and the long side surface 19b, between the horizontal plate portion 56 and the short side surface 19c, and between the bottom plate portion 55 and the bottom surface. A member 70 is disposed.

  The heat insulating member 70 may be disposed so as to cover almost the entire surface with respect to the surface of the battery 19 to be disposed. Further, an opening may be provided in a part of the heat insulating member 70 to enable heat dissipation from the battery 19 or to allow wind from the front grill 15 to be applied.

  As described above, with the configuration including the heat insulating member 70, the electronic control unit 20 suppresses that its own heat is transmitted to the battery 19 and the temperature of the battery 19 exceeds a predetermined management temperature (for example, 80 degrees). it can.

  In addition, when at least one part of the tray part 54 is comprised with resin as mentioned above, the heat insulation member 70 becomes unnecessary in the part comprised with resin. For example, when the bottom plate portion 55 is made of resin, the heat insulating member 70 on the bottom surface side is not necessary.

(Modification 2)
In this modification, the description of the parts common to the electronic control device 20 shown in the above embodiment is omitted.

  As shown in FIG. 16, the electronic control device 20 a of Modification 2 is different from the electronic control device 20 in the shape of the potting material 61, that is, the shape of the internal space 31 a. Moreover, the modification 2 differs in the manufacturing method of the electronic control apparatus 20a from the said embodiment.

  As shown in FIG. 16, in the electronic control unit 20 a, a virtual plane along the boundary surface 61 a in contact with the internal space 31 a of the potting material 61 is orthogonal to the circuit board 30. Further, in the electronic control unit 20a, an injection port 32a1 for the potting material 61 is provided in the housing 32a. That is, the housing 32a is provided with an injection port 32a1 that is a through hole penetrating in the thickness direction (Z direction) of the housing 32a. The circuit board 30 has a connector 32 mounted on one end, and an atmospheric pressure sensor 30a mounted on the end opposite to the end on which the connector 32 is mounted. And the filter 30b is provided in the position which opposes the atmospheric pressure sensor 30a in the side wall part 42. As shown in FIG. The filter 30b is preferably in the direction as close as possible to the atmospheric pressure sensor 30a, but may not be opposed to the atmospheric pressure sensor 30a. In addition, although the structure of the connector 32 differs in the modification 2 and the said embodiment, the same code | symbol is employ | adopted for convenience. Further, the electronic control device 20a may include a heating element 30c.

  In the manufacturing method of this modification, the injection amount of the potting material 61 is controlled using the detection result of the atmospheric pressure sensor 30a. That is, the manufacturing method of the present modification uses the fact that the pressure in the sealed space increases when the potting material 61 is poured into the sealed space. In the manufacturing method of the present modification, the atmospheric pressure in the accommodation region is measured by the atmospheric pressure sensor 30a, and the intended internal volume 31a is formed from the atmospheric pressure value as the detection result.

  As shown in FIG. 17, in the injection process of this modification, as an example, the injection apparatus 100 electrically connected to the terminal 32b is used. The injection device 100 includes an injection unit that injects the potting material 61 from the injection port 32a1 into the accommodation region, a control unit that controls injection of the potting material 61 by the injection unit, and the like. Moreover, the control part of the injection apparatus 100 acquires the detection signal which is a detection result of the atmospheric pressure sensor 30a via the terminal 32b. This detection signal is a signal indicating the pressure value in the accommodation area. The control unit of the injection device 100 controls the injection of the potting material 61 by the injection unit according to the detection signal. The injection device 100 is mechanically connected so that the potting material 60 can be injected from the injection port 32a1 of the structure.

  The manufacturing method of this modification performs an accommodating process similarly to the said embodiment. Also in this modified example, in the housing step, the opening 41 is closed with the connector 32 in a state where the waterproof seal member 32 c is disposed between the housing 31 and the connector 32.

  Moreover, in this manufacturing method, an injection | pouring process is performed after an accommodation process. In the injection step, the potting material 61 is injected in a state where the bottom of the accommodation region when the potting material 61 is injected is located below the position where the filter 30b is formed and the atmospheric pressure sensor 30a. In this modification, the potting material 60 is injected by placing the structure along the Z direction and with the bottom 40 positioned above the connector 32 in the Z direction. That is, in this manufacturing method, the potting material 60 is injected from the lower side of the structure. Therefore, the bottom of the accommodation area when the potting material 61 is poured becomes the connector 32.

  Moreover, in this manufacturing method, the gas flow by the filter 30b is interrupted prior to the injection process (blocking process). This is because, as described above, the atmospheric pressure in the accommodation region is measured by the atmospheric pressure sensor 30a, and the intended internal volume 31a is formed from the atmospheric pressure value as the detection result. That is, this is because the injection process is performed in a state where the accommodation region is a sealed space. The blocking step can block the filter 30b and block the gas flow through the filter 30b. In the blocking process, the through hole 42a to which the filter 30b is not attached may be closed, and the filter 30b may be attached to the through hole 42a after the injection process. In the blocking step, the blocking is released after the injection step.

  In the injection process, for example, the injection apparatus 100 executes processing as shown in FIG. The injection apparatus 100 starts the processing shown in FIG. 18 when a start instruction is given by an operator or the like in a state where the injection apparatus 100 is electrically and mechanically connected to the structure.

  In step S10, the potting material 60 is injected. The control unit of the injection apparatus 100 instructs the injection unit to inject the potting material 60. And the injection | pouring part of the injection apparatus 100 starts injection | pouring of the potting material 60 to the accommodation area | region of a structure.

  In step S20, a detection signal is acquired. The control unit of the injection device 100 acquires a detection signal from the atmospheric pressure sensor 30a. At this time, the control unit of the injection apparatus 100 acquires a detection signal from the atmospheric pressure sensor 30a via the circuit board 30, the terminal 32b, and the like.

  In step S30, it is determined whether the specified value has been reached. When it is determined that the value of the detection signal (atmospheric pressure value) has not reached the specified value, the control unit of the injection device 100 returns to step S10, and when it is determined that the value of the detection signal has reached the specified value, step S40. Proceed to The specified value is a value set based on the value of the detection signal and the space volume value of the internal space 31a. For example, the specified value is based on the internal space 31a in which the atmospheric pressure sensor 30a can be disposed, the gas can flow between the outside of the housing 31 via the filter 30b, and the space volume is minimized. Set.

  In step S30, the injection of the potting material 60 is stopped. The control unit of the injection apparatus 100 instructs the injection unit to stop the injection of the potting material 60. And the injection | pouring part of the injection apparatus 100 stops injection | pouring of the potting material 60 to the accommodation area | region of a structure.

  As described above, in the injection process, the injection amount of the potting material 60 is adjusted based on the atmospheric pressure (atmospheric pressure value) in the accommodation area, which is the detection result of the atmospheric pressure sensor 30a. In the injection step, the atmospheric pressure sensor 30a is arranged, and an internal space 31a in which gas flows between the outside of the housing 31 via the filter 30b is formed. At this time, in the injection step, the potting material 60 is injected without reaching the position where the filter 30b is formed and the atmospheric pressure sensor 30a.

  As described above, in this modification, the same effects as those in the above embodiment can be obtained. Further, in the present modification, the potting material 60 is injected by adjusting the injection amount of the potting material 60 based on the atmospheric pressure in the accommodation area which is the detection result of the atmospheric pressure sensor 30a. For this reason, the potting material 60 does not reach the position where the filter 30b is formed and the atmospheric pressure sensor 30a, and the volume of the potting material 60 in the accommodation region can be easily increased.

  Moreover, since the housing | casing 31 and the connector 32 are not normally transparent, it is difficult to form the above interior spaces 31a. That is, in the injection process, the potting material 60 cannot be visually injected into the accommodation region, so it is difficult to prevent the potting material 60 from reaching the position where the filter 30b is formed and the atmospheric pressure sensor 30a. However, in this modification, the potting material 60 is injected by adjusting the injection amount of the potting material 60 based on the atmospheric pressure, so that the internal space 31a is easily formed. Note that the casing 31 is not transparent when it is made of metal. On the other hand, the connector 32 is not transparent unless the housing 32a is formed of a transparent material.

(Modification 3)
In this modification, the description of the parts common to the electronic control device 20 shown in the above embodiment is omitted.

  As shown in FIGS. 19, 20, 21, and 22, the electronic control device 20 b of Modification 3 is different from the electronic control device 20 in the shape of the potting material 62, that is, the shape of the internal space 31 a. As shown in FIGS. 20 and 21, the electronic control unit 20 b has an atmospheric pressure sensor 30 a and a filter 30 b formed at its corners. That is, in the electronic control device 20 b, the atmospheric pressure sensor 30 a is mounted at the corner of the circuit board 30, and the filter 30 b is formed at the corner of the housing 31. For example, as shown in FIG. 20, the atmospheric pressure sensor 30a and the filter 30b are disposed to face each other. Further, as shown in FIG. 20, the electronic control unit 20b can be said to have an atmospheric pressure sensor 30a and a filter 30b formed at one of the four corners.

  Then, as shown in FIG. 19, in the injection step, the electronic control unit 20b is tilted so that the corners where the atmospheric pressure sensor 30a and the filter 30b are formed are the uppermost part. In other words, in this modification, the potting material 62 is injected while the structure is inclined in consideration of the three-dimensional direction. Accordingly, the electronic control device 20b can make the internal space 31a smaller than the electronic control device 20. In FIG. 19, the connector 32 is illustrated with two ports in order to simplify the drawing. Further, the electronic control device 20b may include a heating element 30c.

(Other variations)
Although the example in which the housing 31 is disposed beside the short side surface 19c of the battery 19 is shown, the present invention is not limited to this. You may arrange | position beside the long side surface 19b.

  Although the example of the battery 19 was shown as a box-shaped member, it is not limited to this. In addition, it is possible to employ any one that has a flat portion at a part of the side surface and is disposed in a compartment separated from the vehicle compartment by the partition wall 16. For example, the engine 18, the relay box 21, the air cleaner, or the like can be a box-shaped member.

  Although the example of the engine compartment 17 in which the engine 18 is arrange | positioned as a compartment and the example of the bonnet 12 was shown as a lid | cover on a compartment, it is not limited to this. A compartment in which the engine 18 is not arranged can also be adopted. For example, when the engine 18 is not provided as a drive source, such as a fuel cell vehicle or an electric vehicle, the present invention can be applied to a compartment in which a fuel cell or a motor as a drive source is disposed. When the engine 18 is not provided, the lid on the compartment is also referred to as a lid.

  Further, the present invention is not limited to the configuration in which the engine 18 is disposed in front of the vehicle interior, but can be applied to the configuration in which the engine 18 is disposed behind the vehicle interior. That is, it is good also considering the engine compartment 17 located behind the vehicle interior as a compartment.

  Although the example of engine ECU was shown as electronic control unit 20, it is not limited to this. The present invention can also be applied to other electronic control devices.

  The bracket 33 showed the example which has the interposition part 50, the leaf | plate spring part 51, the support part 52, the baseplate part 55, and the horizontal board parts 56 and 57. As shown in FIG. However, the bracket 33 may have at least the interposition part 50 and the leaf spring part 51. For example, a configuration having only the interposition part 50, the leaf spring part 51, and the lateral plate part 57 can be adopted. Moreover, the structure which has only the interposition part 50, the leaf | plate spring part 51, and the bottom board part 55 is also employable. Furthermore, a configuration in which only the horizontal plate portion 56 is eliminated in the tray portion 54 can be adopted.

  In the embodiment and the like, an example in which the electronic control device 20 is mounted on the vehicle 10 is employed. However, the present invention is not limited to this. Similarly, the present invention can achieve the object even if it is not disposed at a position adjacent to the battery 19.

  In the embodiment and the like, the electronic control device 20 including the bracket 33 is employed. However, the present invention is not limited to this. The electronic control device 20 may not include the bracket 33. Further, the electronic control devices 20, 20a, 20b may not include the heating element 30c.

  DESCRIPTION OF SYMBOLS 20 ... Electronic control device, 30 ... Circuit board, 30a ... Atmospheric pressure sensor, 30b ... Filter, 30c ... Heating element, 31 ... Housing, 32 ... Connector, 32a ... Housing, 32b ... Terminal, 60 ... Potting material

Claims (10)

A circuit board (30) on which the circuit element (30c) is mounted;
A casing (31) having a bag shape and having a bottom (40) at one end in the depth direction and an opening (41) at the other end, and housing the circuit board;
An electronic control device comprising: a connector (32) mounted on the circuit board and closing the opening of the housing to electrically relay the circuit board and an external device;
An atmospheric pressure sensor (30a) mounted on the circuit board and provided in an accommodation area closed by the housing and the connector;
An internal space (31a) that is provided in the housing region and seals the circuit board without covering the atmospheric pressure sensor, and in which the atmospheric pressure sensor is disposed together with at least one of the housing and the connector. Sealing resin (60, 61, 62) to form)
A filter that is provided in a part of the housing and blocks a flow of liquid between the internal space and the outside while allowing a gas flow between the internal space and the outside of the housing. (30b). An electronic control device comprising:   2. The electronic control device according to claim 1, wherein the connector closes the opening in a state in which a waterproof seal member (32 c) is provided over the entire circumference between the connector and the housing. 3. .   The sealing resin (60, 62) is characterized in that a virtual plane along a boundary surface (60a, 62a) in contact with the internal space intersects the circuit board in an inclined state. Item 3. The electronic control device according to Item 1 or 2.   The electronic control according to claim 1 or 2, wherein the sealing resin (61) has a virtual plane along a boundary surface (61a) in contact with the internal space orthogonal to the circuit board. apparatus.   The electronic control device according to claim 1, wherein the atmospheric pressure sensor is provided at a corner of the circuit board. The housing is formed mainly of metal,
The circuit board is mounted with a heating element that generates heat by operating as the circuit element.
The electronic control device according to claim 1, wherein the sealing resin has thermal conductivity in order to transmit heat generated from the heating element to the housing. A circuit board (30) on which the circuit element (30c) and the atmospheric pressure sensor (30a) are mounted;
A casing (31) having a bag shape and having a bottom (40) at one end in the depth direction and an opening (41) at the other end, and housing the circuit board;
A connector (32) mounted on the circuit board and closing the opening of the housing to electrically relay the circuit board and an external device;
A filter (30b) that is provided in a part of the housing and blocks a flow of liquid while allowing a flow of gas;
A sealing resin (60, 61) provided in a part of an accommodation area closed by the housing and the connector, and a method of manufacturing an electronic control device comprising:
A housing step of closing the opening with the connector while housing the circuit board on which the circuit element, the atmospheric pressure sensor, and the connector are mounted in the housing;
A step of injecting the sealing resin into the storage region after the storage step, wherein the bottom of the storage region when the sealing resin is injected is from a position where the filter is formed and the atmospheric pressure sensor; And injecting the sealing resin in a state where the circuit board is inclined at an acute angle with respect to the direction of gravity.
In the injection step, the filter is formed so that an internal space (31a) in which the atmospheric pressure sensor is arranged and gas flows between the outside of the housing through the filter is formed. A manufacturing method of an electronic control device, wherein the sealing resin is injected without reaching a position and the atmospheric pressure sensor. The filter is provided in a through hole (42a) provided in the housing,
After the injection step, the method includes an attachment step of attaching the filter to the through hole,
8. The method of manufacturing an electronic control device according to claim 7, wherein in the injection step, the sealing resin is injected from the through hole before the filter is attached. A circuit board (30) on which the circuit element (30c) and the atmospheric pressure sensor (30a) are mounted;
A casing (31) having a bag shape and having a bottom (40) at one end in the depth direction and an opening (41) at the other end, and housing the circuit board;
A connector (32) mounted on the circuit board and closing the opening of the housing to electrically relay the circuit board and an external device;
A filter (30b) that is provided in a part of the housing and blocks a flow of liquid while allowing a flow of gas;
A sealing resin (60, 61) provided in a part of an accommodation area closed by the housing and the connector, and a method of manufacturing an electronic control device comprising:
A housing step of closing the opening with the connector while housing the circuit board on which the circuit element, the atmospheric pressure sensor, and the connector are mounted in the housing;
A step of injecting the sealing resin into the storage region after the storage step, wherein the bottom of the storage region when the sealing resin is injected is from a position where the filter is formed and the atmospheric pressure sensor; In an injecting step of injecting the sealing resin,
Prior to the injection step, the flow of the gas by the filter is cut off, and after the injection step, the blocking step of releasing the cutoff,
In the injection step, the injection amount of the sealing resin is adjusted based on the atmospheric pressure in the accommodation area, which is a detection result of the atmospheric pressure sensor, the atmospheric pressure sensor is disposed, and the filter is inserted through the filter. Injecting the sealing resin without reaching the position where the filter is formed and the atmospheric pressure sensor so that an internal space (31a) through which gas flows between the outside of the housing is formed. A method for manufacturing an electronic control device.   The said housing | casing process closes the said housing | casing with the said connector in the state which has arrange | positioned the waterproof seal member (32c) over the perimeter between the said housing | casing and the said connector. The manufacturing method of the electronic control apparatus as described in any one of these.

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