WO2014050591A1 - 電子制御装置 - Google Patents

電子制御装置 Download PDF

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Publication number
WO2014050591A1
WO2014050591A1 PCT/JP2013/074679 JP2013074679W WO2014050591A1 WO 2014050591 A1 WO2014050591 A1 WO 2014050591A1 JP 2013074679 W JP2013074679 W JP 2013074679W WO 2014050591 A1 WO2014050591 A1 WO 2014050591A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
vent
protective wall
ventilation
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/074679
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
良育 根岸
仁 古舘
尭之 福沢
建太郎 山中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Automotive Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Automotive Systems Ltd filed Critical Hitachi Automotive Systems Ltd
Priority to DE112013004771.3T priority Critical patent/DE112013004771B4/de
Priority to CN201380040195.6A priority patent/CN104509226B/zh
Priority to US14/424,675 priority patent/US9781849B2/en
Publication of WO2014050591A1 publication Critical patent/WO2014050591A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
    • H05K5/0047—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB
    • H05K5/0056—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB characterized by features for protecting electronic components against vibration and moisture, e.g. potting, holders for relatively large capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0239—Electronic boxes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0204—Mounting supporting structures on the outside of casings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0213—Venting apertures; Constructional details thereof
    • H05K5/0215—Venting apertures; Constructional details thereof with semi-permeable membranes attached to casings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
    • H05K5/0047—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/06—Hermetically-sealed casings
    • H05K5/068—Hermetically-sealed casings having a pressure compensation device, e.g. membrane

Definitions

  • the present invention relates to an electronic control device for a vehicle in which a circuit board is housed in a waterproof space inside a housing.
  • Electronic control devices mounted on a vehicle such as a general engine control unit or a control unit for an automatic transmission are provided in a protective space (waterproof space) formed by joining a plurality of casing members.
  • the circuit board on which various electronic components are mounted is accommodated.
  • Such an electronic control device is mounted in a vehicle engine room or the like, and thus requires high waterproofness.
  • the inside of the housing is a completely sealed space, the pressure inside the housing increases and decreases. There is a possibility that excessive stress is generated in the casing and its seal portion, resulting in a decrease in durability and reliability.
  • the inventor of the present application has a possibility of causing damage to the waterproof ventilation membrane due to the influence of high pressure water or the like of steam car washing, for example, and a technique for suppressing such damage has been studied. I found it not.
  • the present invention has been made in view of such circumstances, and an electronic control device capable of suppressing the influence of high-pressure water or the like on the breathable waterproof membrane and achieving both waterproofness and breathability inside the housing.
  • the electronic control device according to the present invention is a creation that can solve the above-described problems.
  • One aspect of the electronic control device is a circuit board in which electronic components are mounted in a space formed by joining a plurality of casing members.
  • a housing vent that penetrates at least one of the casing members in a thickness direction of the casing member, and an outer opening of the casing vent is formed in the outer opening.
  • a protective wall that covers the protective wall by providing a gap therebetween, a protective wall vent hole that penetrates the protective wall from the gap in a radial direction of the casing vent hole and is spaced from the casing vent hole, and the casing A breathable and waterproof breathable waterproof membrane attached to the inner opening of the vent hole, and the vent passage between the vent waterproof membrane and the protective wall vent hole is bent.
  • the present invention it is possible to suppress the influence of high-pressure water or the like on the breathable waterproof membrane, and to achieve both waterproofness and breathability inside the housing.
  • FIG. 7 is a schematic cross-sectional view illustrating an example of an electronic control device according to the present embodiment (corresponding to the XX cross-sectional view of FIG. 6).
  • FIG. 7 is a schematic cross-sectional view illustrating an example of an electronic control device according to the present embodiment (corresponding to the XX cross-sectional view of FIG. 6).
  • FIG. 7 is a schematic cross-sectional view illustrating an example of an electronic control device according to the present embodiment (corresponding to the XX cross-sectional view of FIG. 6).
  • the disassembled perspective view (perspective view from the upper side) which shows an example of the electronic controller in an Example.
  • the disassembled perspective view which shows an example of the electronic controller in an Example (perspective view from the downward side).
  • FIG. 7 is a schematic explanatory view showing an example of attachment of the electronic control device in the embodiment (corresponding to the YY sectional view of FIG. 6).
  • FIG. 7 is a schematic explanatory view showing an example of attachment of the electronic control device in the embodiment (corresponding to the YY sectional view of FIG. 6).
  • FIG. 6 is a schematic cross-sectional view showing an example of a housing vent according to the embodiment (corresponding to the XX cross-sectional view of FIG. 6). Schematic showing an example of a housing vent according to the embodiment (figure from information obtained by cross-sectional view of FIG.
  • An electronic control device includes a circuit board on which various electronic components are mounted in a space inside a casing formed by joining a plurality of casing members.
  • a protective wall is formed to cover the outer opening of the housing ventilation hole with a gap between the outer opening and the protective wall ventilation hole.
  • the protective wall penetrates in the radial direction of the casing ventilation hole from the gap and is separated from the casing ventilation hole.
  • the ventilation passage between the ventilation waterproof membrane and the protective wall ventilation hole is bent and has a bent portion, in addition to the function of the ventilation passage to obtain air permeability, the ventilation passage
  • the wall that forms the film also functions as a barrier against intrusion water.
  • a bent portion 6a is formed at the central portion of the ventilation passage 6 between the inner opening 2a of the housing ventilation hole 2 and the protective wall ventilation hole 3a (and 3c).
  • the wall surface of the ventilation passage 6 (for example, the surface near the bent portion 6a), for example, the inner wall surface of the protective wall 3 and the inner wall surface of the housing vent hole 2 (that is, the housing vent hole 2) as shown in FIG.
  • the outer opening 2b side of the inner opening 2a and the edge surface of the outer opening 2b function as barriers, the intruding water S easily collides with the barriers, and the water pressure of the invading water S that collides decreases. It will be. And in the ventilation waterproof film 5 attached to the inner side opening part 2a of the housing
  • the protective wall 3 is provided by providing the gap 3b between the outer opening 2a of the housing vent 2 and the outer opening 2a as shown in FIG.
  • the intruding water S can enter the inside of the housing vent 2 of the vent passage 6 through the pore 3a.
  • the vent passage 6 is bent by the bent portion 6a, the wall surface of the vent passage 6 is intruded.
  • the shape of the housing vent 2 and the protective wall vent 3 is reduced, or the distance between the casing vent 2 and the protective wall vent 3 is increased more than necessary.
  • the water pressure of the intrusion water S can be reduced by the wall surface of the ventilation passage 6 having the bent portion 6a. Therefore, according to the electronic control device of the present embodiment, sufficient air permeability can be easily obtained without causing an increase in the size of the housing, and both the air permeability and the waterproof property can be achieved.
  • the ventilation passage having the bent portion is formed as described above, various configurations of the electronic control device including the casing ventilation hole and the protective wall can be applied in various forms.
  • the shape of the casing ventilation hole, the gap, and the protective wall ventilation hole can be appropriately set as long as the bent ventilation passage can be formed as described above.
  • the cross-sectional shape of the housing vents and gaps, the inner and outer openings of the housing vents, and the shape of the protective wall vents are limited to shapes such as perfect circles, ellipses, and polygons. However, various shapes may be used.
  • the intrusion water can enter the ventilation passage at various angles from the outer peripheral side of the housing through the protective wall ventilation hole.
  • the water pressure of the intrusion water entering linearly may be relatively high.
  • an angle at which the intrusion water can enter is defined as shown below, and the shape of the housing vent hole or the like is set. Conceivable.
  • an intrusion water S that enters the inside of the housing vent of the ventilation passage through the protective wall vent is hypothesized as a projection line, and is shown in FIG. 1 (schematic diagram corresponding to the XX cross-sectional view of FIG. 6 described later).
  • the angle formed by the projection line (that is, the intrusion water) S and the inner opening 2a of the housing vent 2 of the housing member 1 (corresponding to the cover 13 described later) is ⁇ 1 , and the projection line S is passed through the housing.
  • the opening width of the inner opening 2a in the direction orthogonal to the two perpendicular lines orthogonal to the inner opening 2a of the air hole 2 is W
  • the axial length of the housing vent 2 is D
  • W and D the ratio D / W and tan ⁇ 2.
  • the wall surface of the ventilation passage that is, the inner wall of the protective wall 3, the housing passage
  • the inner wall surface of the pores 2 that is, the outer opening 2b side of the inner opening 2a of the housing vent 2
  • the edge surface of the outer opening 2b, etc. easily function as a barrier against the intruding water S and collide with the barrier.
  • the water pressure of the infiltrated water S decreases.
  • casing ventilation hole 2 the direct collision of the intrusion water S is suppressed.
  • the angle ⁇ 1 related to the intruding water S is, for example, the mounting position of the electronic control device with respect to the vehicle body, the shape of the housing (housing member 1 or the like), the shape of the protective wall 3 (the protective wall ventilation hole 3a or the gap 3b).
  • the shape is determined by the position of the housing vent 2 and the like, and even if the intruding water S enters the inside of the housing vent 2 through the protective wall vent 3a in the range, tan ⁇ 1 Since the housing vent hole 2 and the protective wall 3 having a shape designed so as to be relatively small (for example, designed to satisfy the relational expression ⁇ ) may be provided, the housing vent hole, the protective wall vent hole, etc.
  • the intrusion water S directly into the ventilation waterproofing membrane 5 can be obtained without reducing the shape of the ventilation waterproof membrane 5 more than necessary or increasing the distance between the housing ventilation hole and the protective wall ventilation hole more than necessary. Collisions can be suppressed.
  • the opening width of the inner opening differs depending on the direction of the cross section, such as a housing vent having an oval cross section (for example, when the ellipse has a minor axis or a major axis), it is the shortest.
  • the housing vent so that the opening width is W according to the relational expression ⁇ (when the cross section is elliptical, the tan ⁇ 1 is easily reduced).
  • a protrusion 2c is provided on the edge surface of the outer opening 2b (or the inner opening 2a) of the housing vent 2. Even in this case, tan ⁇ 1 can be easily reduced (the relational expression ⁇ can be more easily satisfied).
  • the gap with the housing ventilation hole, the shape of the housing ventilation hole, and the like can be set as appropriate.
  • a protrusion in the protective wall for example, a schematic diagram corresponding to FIG.
  • the protrusion 3d is a barrier against the intrusion water S. The direct collision of the intrusion water S with respect to the housing vent hole 2 is further suppressed.
  • the distance between the housing vent 2 and the protective wall vent 3 is L
  • the opening width (height) of the protective wall vent 3a is H
  • the ratio of L to H is L.
  • the inner wall surface of the protective wall 3, the edge surface of the outer opening 2b and the like function as a barrier against the intruding water S and reduce the water pressure of the intruding water S.
  • the direct collision of the intrusion water S against the ventilation waterproof film 5 is further suppressed.
  • the protective wall 3 may be formed not only with a single protective wall vent hole 3a but also with a plurality of vent holes, for example, protective wall vent holes 3a and 3c as shown in FIGS.
  • a plurality of vent holes for example, protective wall vent holes 3a and 3c as shown in FIGS.
  • the inner wall surface of the protective wall 3, and the protective wall vent holes 3a and 3c to have a tapered shape, for example, intrusion water S (intrusion water whose water pressure is reduced by the barrier) ) Or the like is accumulated in the housing vent hole 2 or the like, the accumulated water is easily discharged to the outside from the housing vent hole 2 or the like.
  • the cross-sectional direction of the housing vent 2 has a predetermined angle with respect to the horizontal direction (the horizontal direction according to the mounting position of the electronic control device), even if the intruding water S enters the housing vent 2. Even in a state where it can accumulate, the inside of the housing vent 2 is suppressed so as not to become full, and the drainage of the accumulated water is further promoted.
  • the material applied to the casing member and the protective wall is not particularly limited as long as it can form a ventilation passage having a bent portion, and for example, satisfies the relational expression ⁇ and the relational expression ⁇ as described above.
  • casing ventilation hole and a protective wall ventilation hole is mentioned.
  • resin molding using a resin material, or a metal material (aluminum, iron, etc.) integrally molded into a desired shape by a mold molding method or a casting method (die casting, etc.) can be mentioned.
  • the surface of the casing member or the like may be subjected to a thin film insulation treatment (for example, a surface treatment such as anodized or a coating treatment such as cationic electrodeposition). good.
  • a thin film insulation treatment for example, a surface treatment such as anodized or a coating treatment such as cationic electrodeposition.
  • the electronic control device 10 includes a casing formed by liquid-tightly bonding a substantially plate-like case 12 attached to the vehicle body side and a substantially box-shaped cover 13 (joining via a sealing material), and the inside of the casing.
  • the bracket 23 of the case 12 that is mounted in the engine room or the like and serves as a mounting surface on the vehicle body side is configured.
  • 24 are attached to the vehicle body side.
  • the mounting surface on the vehicle body side is configured in parallel with the bottom surface of the case 12, but depending on the shape of the mounting portion (brackets 23 and 24) on the vehicle body side, May tilt.
  • the circuit board 4 is not heated relatively on the upper side surface (the surface on the cover 13 side) 4a, such as a capacitor or a coil, or has a special heat dissipation such as a heat sink.
  • a non-exothermic component 6 that does not require treatment is mounted, and a so-called exothermic component 3 such as an arithmetic processing unit, a transistor, or an IC is mounted on the lower side surface (surface on the case 12 side) 4b.
  • a printed wiring board for example, a wiring circuit pattern is formed on the front and back surfaces of a plate material made of glass epoxy resin or the like, or inside thereof, and a heat generating component 3 and a non-heat generating component 6 are electrically connected to the wiring circuit pattern by soldering or the like. It is connected to the.
  • a connector 15 having two first and second connection ports 16 and 17 connected to external connectors is attached to a part of the peripheral side of the circuit board 4.
  • the connector 15 is obtained by integrating the connection ports 16 and 17 divided into two according to the connection destination via the attachment base 15a, and is connected to the circuit board 4 via the attachment base 15a. It is fixed (for example, fixed by a plurality of screws).
  • the connector 15 is configured such that a series of connection ports 16 and 17 connected by an attachment base portion 15a face the outside through a window portion 13a that is a space formed between the case 12 and the cover 13. Here, it is connected to a connector on the vehicle side.
  • the connector 15 is provided with a plurality of male terminals 16a and 17a that are electrically connected to the wiring circuit pattern on the circuit board 4, and these male terminals 16a and 17a are accommodated in a connector (not shown). By being connected to a plurality of female terminals, it is electrically connected to predetermined devices such as sensors and pumps connected to a connector (female terminal) outside the figure.
  • the case 12 is integrally formed in a substantially plate shape, more specifically, a shallow box shape with a slightly raised peripheral edge made of a metal material having excellent thermal conductivity such as aluminum.
  • the side wall 12b is erected on the outer peripheral edge (each side) of the substantially rectangular bottom wall 12a, and the whole is configured to open upward.
  • Cover fixing portions 28 for attaching and fixing the cover 13 are formed at the four corners of the side wall 12b, and each of the cover fixing portions 28 is provided with a through hole 28a penetrating in the vertical direction.
  • the mounting and fixing of the circuit board 11 is performed via a board fixing part 19 erected on the peripheral edge of the bottom wall 12a of the case 12 on the inner wall surface side.
  • a flat support surface for supporting the circuit board 4 is formed at the upper end of the board fixing portion 19, and a screw (not shown) for fixing the circuit board 4 is screwed onto each of the support surfaces.
  • a female screw hole 19a is formed.
  • brackets 23 and 24 for mounting the electronic control device 10 on a vehicle body are integrally provided on the outer side of the side wall 12b of the case 12.
  • Each of the brackets 23 and 24 is provided with a through hole 23a penetrating in the vertical direction and a notch groove 24a opened to the side.
  • the bolts and the like that pass through the through hole 23a and the notch groove 24a are used to move toward the vehicle body side. Is installed.
  • a plurality of strip-shaped heat radiation fins 12 c are provided in parallel at predetermined intervals on the back surface side of the bottom wall 12 a in the case 12.
  • the cover 13 is integrally formed in a substantially box shape with a predetermined synthetic resin material, which is lighter and lower in cost than a metal material, and includes an upper wall portion 25 that covers the circuit board 4 and the connector 15, and the above-described cover 13. And a side wall 26 surrounding three sides of the periphery of the upper wall portion 25 excluding the window portion 13a.
  • Positioning protrusions 27a having a shape that can be inserted into the through holes 28a of the cover fixing part 28 are formed at positions on the side wall 26 facing the cover fixing part 28 of the case 12, and the positioning protrusions 27a are respectively formed.
  • the joint part with the inner peripheral part of the window part 13a is each joined fluid-tightly through the sealing agent.
  • a seal groove is formed on one of them, or a protrusion is provided on the other, and this protrusion is inserted into the seal groove with a gap, It can be configured such that the desired sealability can be obtained by sufficiently securing the length of the sealing agent filled in the gap between the seal groove and the protrusion, that is, the so-called seal length.
  • the sealing agent is not particularly limited as long as it has fluidity. For example, epoxy, silicone, acrylic, and the like, meet the specifications and requirements of the electronic control device 10. It can be appropriately selected depending on the case.
  • the device 10 has a structure in which the connector 15 that opens to the side is attached to one end of the circuit board 4.
  • the cover 13 has a stepped shape corresponding to each of the circuit board 4 and the connector 15 having different dimensions (heights) in the thickness direction of the board.
  • an upper step portion 29 and a lower step portion 30 that are parallel to the mounting surface 11 of the case 12 are provided on the upper wall portion 25 of the cover that faces the case 12 with the circuit board 4 and the connector 15 interposed therebetween.
  • the upper step portion 29 covering the upper portion of the connector 15 is set to have a larger dimension in the substrate thickness direction than the lower step portion 30 covering the upper portion of the circuit board 4.
  • the inclined wall part 31 which connects the upper step part 29 and the lower step part 30 from which height differs in this way smoothly is provided.
  • the inclined wall portion 31 is flatly inclined with respect to the bottom wall 12a of the case 12 at a predetermined inclination angle, for example, an inclination angle of about 45 degrees, and therefore the same applies to the upper step portion 29 and the lower step portion 30. It is inclined at an inclination angle.
  • the inclined wall portion 31 is provided with a protective wall 3 in order to protect the housing vent 2 formed so as to penetrate in the thickness direction for the purpose of forming a so-called breathing filter.
  • the case ventilation hole 2 is provided with a thin-film ventilation waterproof film (not shown) such as Gore-Tex (registered trademark) having both waterproofness and air permeability. It is protected so that high-temperature and high-pressure water is not sprayed directly onto the ventilation waterproofing membrane.
  • a thin-film ventilation waterproof film such as Gore-Tex (registered trademark) having both waterproofness and air permeability. It is protected so that high-temperature and high-pressure water is not sprayed directly onto the ventilation waterproofing membrane.
  • the protective wall 3 covers the periphery of the outer opening 2b of the housing vent hole 2 with a predetermined gap 3b as shown in FIGS. 1 to 3 so as to allow ventilation to the housing vent hole 2.
  • the protective wall ventilation holes 3a and 3c are provided so as to communicate with the gap 3b.
  • the inner wall surface of the protective wall 3 for forming the gap 3b is a casing vent hole 2 to which the ventilation waterproof film 5 is attached so as to effectively protect the ventilation waterproof film 5 from intrusion water S such as car wash water. Larger area and dimensions are set.
  • the gap 3b of the protective wall 3 and the protective wall ventilation holes 3a and 3c constitute a series of ventilation passages that allow ventilation to the enclosure ventilation hole 2, and accumulate in the enclosure ventilation hole 2 as will be described later. It also functions as a drainage passage for draining the accumulated water S1 and the like due to the intruding water S and the like.
  • FIG. 7 ((B) is a schematic diagram corresponding to the YY sectional view of FIG. 6).
  • FIG. 8 ((B) is a schematic view corresponding to the YY cross-sectional view of FIG. 6)
  • the mounting surface 11 is set in a horizontal direction 48 as shown in FIG. It is either a standing posture.
  • the present inventors pay attention to this point, and the casing vent hole 2 is formed on the outer wall of the casing so that the ventilation waterproof film 5 is inclined at a predetermined angle with respect to the mounting surface 11 of the casing on the flat vehicle body side.
  • the inclined wall part 31 which inclines with respect to the attachment surface 11 to the vehicle body side.
  • the ventilation waterproof film 5 is inclined with respect to the horizontal plane (left and right direction in FIGS. 7 and 8) in both the vertical and horizontal mounting positions. For this reason, even if the accumulated water S1 due to the intruding water S or the like is accumulated in the casing vent hole 2, a part of the accumulated water S1 (water surface) at a time before full water (when a certain amount of accumulated water S1 is accumulated). ) Reaches the upper end of the slanted housing vent 2 and is drained to the outside through the gap 3b, and it is possible to suppress the accumulation of the accumulated water S1.
  • the air-permeable waterproof membrane 5 is prevented from being blocked by the intruding water S and the like, and the air-permeable waterproof membrane 5 ensures the desired air permeability and breathability while having a simple structure, and is reliable and durable. Can be improved.
  • the inclination angle of the breathable waterproof film 5 with respect to the mounting surface 11 may be set to, for example, 45 degrees or a predetermined range centered on 45 degrees, specifically, an inclination angle of about 30 to 60 degrees. As a result, it is possible to ensure a sufficient inclination angle of about 45 degrees with respect to the horizontal plane in both the vertical and horizontal mounting postures. Respirability can be ensured.
  • the dimensions and shape of the housing ventilation holes 2 and the like are premised on satisfying the relational expression ⁇ and the relational expression ⁇ .
  • the diameter (diameter dimension) of the housing vent 2 is set sufficiently larger (for example, set to be twice or more) than the depth (axial dimension) of the casing vent 2.
  • a projection is formed in the housing vent 2, for example, by forming a projection 2c near the outer opening 2b in the housing vent 2, as shown in FIG.
  • the radial dimension of the outer opening 2b may be reduced. According to such a configuration, the intrusion of the intrusion water S into the housing vent hole 2 can be suppressed.
  • the protrusion 2c as shown in FIG. 10, by forming a through hole 2d communicating with the inside of the housing vent hole 2 (for example, penetrating in the same penetration direction as the housing vent hole 2), For example, the accumulated water (corresponding to the accumulated water S1 in FIGS. 7 and 8) accumulated in the housing vent 2 is easily drained.
  • the through-hole 2d can be appropriately formed with respect to the protrusion 2c, but it is preferable to form the through-hole 2d at a position spaced apart from the protective wall ventilation holes 3a and 3c, for example.
  • the opening shape of the protective wall vents 3a and 3c may be various shapes such as a trapezoidal shape, a perfect circle shape, an elliptical shape, and a semicircular shape.
  • FIG. 11 and FIG. (Schematic cross-sectional view from the Z direction) may be applied with a protrusion 3e protruding inside the protective wall vent 3c, and the intrusion of the infiltration water S can be further suppressed. It becomes.
  • part which functions as a barrier of the intrusion water S in the apparatus 10 for example, when the intrusion water S can collide with the corner
  • the protective wall 3 may be inclined as in the present embodiment, which may cause an increase in the height dimension and the width dimension of the vehicle, or a decrease in vehicle mountability such as interference with other parts in the engine room.
  • the protective wall 3 is provided on the wall 31, the protective wall 3 swells into a space obliquely forward of the inclined wall 31 that does not affect the overall dimensions of the apparatus, and the apparatus associated with the provision of the protective wall 3. The increase in the size of the vehicle can be suppressed, and the vehicle mountability can be improved.
  • the cover is provided according to the difference in thickness between the connector 15 and the circuit board 4.
  • 13 is a stepped shape, that is, the upper wall portion 25 of the cover 13 is provided with an upper step portion 29 and a lower step portion 30 having different heights in parallel to the mounting surface 11, and more specifically, the upper step portion covering the thick connector 15.
  • the portion 29 is set to have a larger dimension in the substrate thickness direction than the lower step portion 30 that covers the thin circuit board 4.
  • the portion connecting the upper step portion 29 and the lower step portion 30 having different heights may be used as the inclined wall portion 31, and the housing vent hole 2 may be formed in the inclined wall portion 31, and the inclined wall portion 31 needs to be provided separately. Therefore, the application of the present invention is very easy.
  • the inclined wall portion 31 is inclined with respect to the upper step portion 29 and the lower step portion 30, for example, compared to a structure in which the upper step portion 29 and the lower step portion 30 are connected by a vertical wall portion, The inclination / curvature angle of the connecting portion (edge portion) between the lower step portion 30 and the inclined wall portion 31 becomes gentle, and stress concentration on this portion can be reduced.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Casings For Electric Apparatus (AREA)
PCT/JP2013/074679 2012-09-28 2013-09-12 電子制御装置 Ceased WO2014050591A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112013004771.3T DE112013004771B4 (de) 2012-09-28 2013-09-12 Elektronische Steuervorrichtung
CN201380040195.6A CN104509226B (zh) 2012-09-28 2013-09-12 电子控制装置
US14/424,675 US9781849B2 (en) 2012-09-28 2013-09-12 Electronic control device

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