JP2006021748A - Electronic control unit storage box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic control unit storage box which is installed in an engine room of a car and cools an electric control unit with air introduced from a cabin, and is capable of eliminating the possibility that exhaust gas in the engine room flows into the cabin. <P>SOLUTION: The electronic control unit storage box comprises a box body 16 to store an electronic control unit 14, an inner lid 18 to cover an upper opening of the box body in an airtight manner, and an outer lid 20 to cover the upper opening of the box body from the top of the inner lid. An intake/exhaust pipe 40 to circulate air in the box body 16 with air in a cabin B is mounted below the inner lid 18. The electronic control unit 14 placed in a case 22 is stored in the box body 16, and the case 22 is fitted to the inner id 18 in an airtight manner. Even if the outer lid 20 is removed, airtightness between the inner lid 18 and the box body 16 is maintained, and exhaust gas in an engine room A does not flow into the cabin B. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic control unit housing box installed in an engine room of an automobile.

  The electronic control unit controls an electronic fuel injection device, an antilock brake control device, and the like. The electronic control unit is installed in a vehicle compartment or an engine room of the automobile while being housed in a box. The electronic control unit is preferably installed in the engine room in consideration of easiness of wiring and the like, but since the engine room is at a high temperature, cooling of the electronic control unit becomes a problem. Since the electronic control unit uses electronic parts such as a semiconductor integrated circuit, its performance cannot be guaranteed unless it is below a certain temperature. In view of this, a method has been proposed in which an electronic control unit installed in an engine room is cooled with air in the passenger compartment (see Patent Document 1).

  This system includes an inner box that houses the electronic control unit, an outer box that houses the inner box, and a lid that covers the outer box. Air between the inner box and the outer box And the electronic control unit is cooled.

JP-A-10-224955

  However, since the electronic control unit housing box disclosed in Patent Document 1 is a system that circulates the air between the inner box and the outer box with the air in the passenger compartment, in the unlikely event that the cover is removed, Exhaust gas in the engine compartment will flow into the passenger compartment, putting the passenger at risk.

  An object of the present invention is to provide an electronic control unit housing box in which exhaust gas in an engine room does not flow into the vehicle compartment.

  An electronic control unit storage box according to the present invention is installed in an engine room of an automobile and performs cooling of the electronic control unit with air introduced from a passenger compartment. An inner lid that airtightly closes the upper opening of the box and an outer lid that closes the upper opening of the box from above the inner lid. The box has air inside the box below the inner lid. An intake / exhaust pipe that circulates with air in the passenger compartment is attached.

  The electronic control unit storage box according to the present invention is preferably stored in the box with the electronic control unit being put in the case, and the case is airtightly attached to the inner lid.

  The electronic control unit storage box according to the present invention may be stored in the box with the electronic control unit supported by the support member.

  In the electronic control unit storage box according to the present invention, it is preferable that the inner lid is provided with a drain pipe for discharging the water accumulated on the upper surface to the outside of the box.

  According to the present invention, the box is covered with the inner lid and the outer lid, and the air inside the inner lid is circulated with the air in the passenger compartment, so that even if the outer lid is removed, Since the airtightness between the boxes is maintained, there is no possibility that exhaust gas in the engine room flows into the vehicle compartment. Therefore, the safety of the electronic control unit storage box installed in the engine room can be enhanced.

Embodiment 1 FIG. 1 shows an embodiment of an electronic control unit accommodation box according to the present invention. In the figure, 10 is an electronic control unit housing box, and 12 is a partition wall that partitions the engine room A and the vehicle compartment B of the automobile. The electronic control unit accommodation box 10 is installed in the engine room A. The electronic control unit housing box 10 includes a box 16 that houses the electronic control unit 14, an inner lid 18 that hermetically closes the upper opening of the box 16, and an upper opening of the box 16 from above the inner lid 18. And an outer lid 20 that closes the door.

  The electronic control unit 14 is built in the case 22. The case 22 is airtightly attached to the lower surface of the inner lid 18 through the packing 24 at the upper flange portion. A harness through hole 26 is formed in the inner lid 18 at a portion corresponding to the upper end opening of the case 22. The electronic control unit 14 is assembled with a connector terminal housing 30 attached to the tip of the wire harness 28 through the through hole 26. The wire harness 28 passes through the outer lid 20 and is led out to the engine room A.

  The periphery of the inner lid 18 is airtightly attached via a packing 34 on a receiving frame 32 formed on the upper inner surface of the box 16. Reference numeral 36 denotes a screw that attaches the inner lid 18 to the frame 32. Instead of the screw 36, it can be attached by a clip or a lock mechanism.

  The outer lid 20 is attached via a packing 38 so as to cover the upper end of the box 16. The outer lid 20 is for preventing water from entering the box 16 even if the electronic control unit housing box 10 is splashed with water. The portion of the outer lid 20 through which the wire harness 28 passes is preferably waterproofed with a grommet (not shown).

  An intake / exhaust pipe 40 that connects the inside of the box 16 and the interior of the vehicle compartment B is attached to the box 16 below the position where the inner lid 18 is attached. The intake / exhaust pipe 40 is simplified and shown as a single object in the drawing, but actually includes an intake pipe and an exhaust pipe. An electric fan 42 for circulating air is provided at the air inlet of the box 16.

  Since the electronic control unit housing box 10 is configured as described above, even if the outer lid 20 is removed as shown in FIG. 2, the airtightness between the inner lid 18 and the box body 16 is maintained, so that the engine There is no possibility that the exhaust gas in the room A flows into the passenger compartment B.

  Next, with reference to FIGS. 3A to 3D, a method for assembling the electronic control unit housing box 10 described above will be described. A harness through hole 26 and a screw hole 44 are formed in the inner lid 18 as shown in FIG. 4A, and a packing 34 is mounted around the lower surface of the inner lid 18. The case 22 containing the electronic control unit 14 is assembled to the lower surface of the inner lid 18 with a screw 46 as shown in FIG. A packing 24 is attached to the upper end flange portion of the case 22 in advance.

  Note that there are electronic control units that are not necessary depending on the vehicle type and grade. In that case, the harness through hole 26 to which the electronic control unit is not attached may be closed by sticking a seal from the upper surface of the inner lid 18.

  On the other hand, an intake / exhaust pipe 40 and an electric fan 42 are attached to the box 16 in advance as shown in FIG. The box 16 with the intake / exhaust pipe 40 and the electric fan 42 is installed at a predetermined position in the engine room A. Next, the inner lid 18 in which the case 22 with the electronic control unit 14 is assembled is fixed to the box 16 installed in the engine room A with screws 36. Thereafter, as shown in (D), the connector terminal housing 30 attached to the tip of the wire harness 28 is assembled to the electronic control unit 14 from the harness through hole 26 of the inner lid 18. Finally, as shown in FIG. 1, when the wire harness 28 is pulled out of the outer lid 20 and the outer lid 20 is put on the upper end of the box 16 via the packing 38, the electronic control unit housing box 10 is completed.

  The electronic control unit storage box according to this embodiment has a plurality of electronic control units by assembling an inner lid in which a plurality of electronic control unit built-in cases are assembled in advance to a box body that is installed in the engine room in advance in a vehicle assembly line. Since the units can be assembled together, there is an advantage that the work efficiency in the vehicle assembly line is improved.

  Even if some electronic control units do not exist, depending on the type of vehicle installed, the common interior lid and electronic control unit storage case (empty case where there is no ECU) are installed as they are, so that the vehicle compartment and engine Double shielding between rooms is possible.

[Embodiment 2] FIG. 4 shows another embodiment of an electronic control unit accommodation box according to the present invention. The electronic control unit housing box 10 is different from that of the first embodiment in that the electronic control unit 14 is housed in the box 16 while being supported by the support member 48, and the inner lid 18 The water drain pipe 50 for discharging the water accumulated on the upper surface to the outside of the box body 16 is provided. In this case, since the wire harness 28 is introduced into the box 16 through the inner lid 18, a grommet 52 is attached to a portion where the wire harness 28 penetrates the inner lid 18 to maintain airtightness. . Since the configuration other than the above is the same as that of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted. The drain pipe 50 can also be provided in the electronic control unit housing box of the first embodiment.

Sectional drawing which shows one Embodiment of the electronic control unit accommodation box which concerns on this invention. Sectional drawing which shows a state when the outer cover of the electronic control unit accommodation box of FIG. 1 removed. (A)-(D) is explanatory drawing which shows the process of assembling the electronic control unit accommodation box of FIG. Sectional drawing which shows other embodiment of the electronic control unit accommodation box which concerns on this invention.

Explanation of symbols

10: Electronic control unit housing box 12: Partition wall 14 between engine room A and vehicle compartment B 14: Electronic control unit 16: box 18: inner lid 20: outer lid 22: case 24: packing 26: harness through hole 28: wire Harness 30: Connector terminal housing 32: Receiving frame 34: Packing 36: Screw 38: Packing 40: Intake / exhaust pipe 42: Electric fan 48: Support member 50: Drain pipe 52: Grommet

Claims (4)

  An electronic control unit storage box that is installed in an engine room of an automobile and that cools the electronic control unit with air introduced from the passenger compartment. The box for storing the electronic control unit and the upper opening of the box are hermetically sealed. And an outer lid that closes the upper opening of the box body from above the inner lid, and the box body circulates the air in the box body with the air in the vehicle compartment below the inner lid. An electronic control unit storage box having an intake / exhaust pipe attached thereto.   2. The electronic control unit housing box according to claim 1, wherein the electronic control unit is housed in the box in a state of being put in the case, and the case is airtightly attached to the inner lid. Unit storage box.   2. The electronic control unit housing box according to claim 1, wherein the electronic control unit is housed in the box while being supported by the support member.   The electronic control unit storage box according to any one of claims 1 to 3, wherein a drain pipe for discharging water accumulated on the upper surface of the inner lid to the outside of the box is provided. Electronic control unit storage box.

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