JP4409260B2 - Mounting structure of the control unit installed in the engine room - Google Patents

Description

  The present invention relates to a mounting structure for a control unit installed in an engine room of an automobile.

  Conventionally, as a mounting structure for this type of control unit, a configuration is known in which a control unit is disposed in the vicinity of the engine mount formation position on the side member upper surface extending in the vehicle longitudinal direction in the engine room (for example, , See Patent Document 1). According to this, the load on the harness due to the vibration of the engine body can be reduced, and the wiring space for the harness can be reduced.

  Further, as an attachment structure for accommodating the control unit in the accommodation box and arranging it in the engine room, an inner box portion for accommodating the control unit and an outer box portion formed with a heat radiation gap between the inner box portion and And a second box body that is continuously provided at the lower end of the outer box portion of the first box body and surrounds the lower side wall and bottom wall of the inner box portion with a clearance for heat dissipation. (For example, refer to Patent Document 2). According to this, heat transfer from the outside to the control unit can be suppressed even in a high-temperature atmosphere, and the waterproof property is also excellent.

JP 2000-186593 A JP 9-163556 A

  However, when the control unit is mounted behind the wheel even in the engine room, the technique disclosed in Patent Document 1 may cause damage to the pebbles and the like jumped up by the wheel by hitting the control unit ( Hereinafter referred to as “chipping”).

  Further, in the case of a control unit for controlling relatively large electric power, it is preferable that the control unit is cooled by traveling wind generated by traveling of the automobile because the amount of heat generated by the control unit itself is large. However, the technique disclosed in Patent Document 2 aims to prevent the temperature of the control unit from rising due to the flow of ambient high-temperature air, and the control unit cannot be sufficiently cooled.

  The present invention has been made based on such knowledge. When installing the control unit in the engine room, the control unit can be prevented from being damaged by chipping or the like, and heat radiation of the control unit can be promoted. It is an object of the present invention to provide a control unit mounting structure that can be used.

In order to achieve the above object, according to the control unit mounting structure of the present invention, as shown in claim 1, a filter portion (20) for adjusting internal pressure via a bracket member (10) fixed in an engine room of a vehicle. Control unit mounting structure for fixing a control unit (6) having a vertical bead portion (11, 12) extending at least in a vehicle vertical direction to a bracket member, and a branch extending from the vertical bead portion toward a side wall of an engine room A bead portion (11a) is provided, the vertical bead portion is provided to be wider than the branch bead portion, and the vertical bead portion is disposed so as to overlap a position where the filter portion is provided. And extending to the end face of the bracket member. According to this, the bead portion serves as a passage for releasing the hot air staying between the bracket member and the control unit to the outside, and promotes heat dissipation of the control unit, while also having a reinforcing effect to improve the strength of the bracket member. . Further, since the control unit is not directly fixed in the engine room, the risk of the control unit being damaged due to deformation of the vehicle body is low.

Moreover, as shown in Claim 2, the said bead part can be set as the structure which has a branch part extended | stretched to a side wall direction .

According to a third aspect of the present invention, the control unit is disposed on the vehicle rear side of a damper base that supports the upper end of the damper on the vehicle body, and the bracket member has at least a front surface and a dashboard side of the control unit as a rear surface. It can be set as the structure which covers a bottom face.

  According to the present invention, when the control unit is installed in the engine room, damage to the control unit due to chipping or the like can be prevented, and heat dissipation of the control unit can be promoted.

  Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an outline of an engine room employing a control unit mounting structure according to the present invention. The engine 1 is accommodated in the approximate center in the engine room, and damper bases 4 and 5 for supporting the damper upper ends 2 and 3 of the suspension device on the vehicle body are provided in the vicinity of the left and right side edges in the engine room. ing. A control unit 6 for controlling the fuel injection of the engine 1 is disposed on the vehicle rear side of the right damper base 5. The control unit 6 is fixed with bolts to a dashboard 7 that partitions an engine room and a driver's seat and the like and a right side wall (not shown) of the engine room via a mounting bracket described later. Although not shown for simplicity, auxiliary devices are arranged around the engine 1, and the engine 1 and the control unit 6 are electrically connected by a harness. .

  2, 3 and 4 are a rear view, a bottom view and a cross-sectional view showing a bracket member used in the mounting structure of the control unit according to the present invention, respectively. The bracket member 10 includes four surfaces of the control unit 6 having a substantially rectangular parallelepiped (in the mounting structure shown in FIG. 1, the front and left sides of the control unit 6 excluding the dashboard 7 side (rear surface) and the right side wall side (right side surface). The first bead portion 11 has a flat cross section provided so as to protrude outwardly on the surface of the bracket member 10, corresponding to the top surface and the bottom surface. And a second bead portion 12, a bracket attachment portion 13-15 provided with a bolt hole for attachment in the engine room, and an opening 16 for exposing the connection terminal portion 23 of the control unit 6.

  Here, as an embodiment of the bracket member, a structure covering the four surfaces of the control unit 6 is shown. However, the present invention is not limited to this, and chipping caused by pebbles or the like that are flipped up by wheels is prevented. In order to function as a protective cover that protects the filter unit 20 for adjustment, any structure that covers at least two surfaces (front and bottom surfaces) of the control unit 6 may be used.

  As shown in FIG. 2, the bracket member 10 is provided with bolt holes 21 a to 21 c for attaching the control unit 6. Also, the control unit 6 side is provided with bolt holes 22a-22c at positions corresponding to the holes 21a-21c, and the control unit 6 is fixed to the back surface (inner surface) of the bracket member 10 with bolts. The At this time, the connection surface of the connection terminal portion 23 of the control unit 6 is exposed from the opening 16 of the bracket, and can be electrically connected to the outside. As shown in FIG. 4, a gap 24 is provided between the bracket member 10 and the control unit 6 so as to ensure a certain gap except for a portion that is generally fixed by a bolt. Here, the distance between the bracket member 10 and the control unit 6 in the gap portion 24 is preferably about 2 to 4 mm in order to promote heat dissipation without disturbing the air flow. The control unit 6 is attached to the engine room by bringing the attachment part 13 and the attachment parts 14 and 15 of the bracket member 10 into contact with the dashboard 7 and the right side wall 8 of the engine room, respectively, and fixing them with bolts.

  The first bead portion 11 traverses the bottom surface (end surface) of the bracket member 10 (see FIG. 3), extends the front surface of the bracket member 10 upward in the vehicle vertical direction (see FIG. 2), and further, the top surface of the bracket member 10 It reaches the edge of (end face) (see FIG. 4). Here, as shown in FIG. 2, the first bead portion 11 is disposed so as to substantially overlap the position where the internal pressure adjustment filter portion 20 is provided on the front surface of the control unit 6 while bypassing the bolt hole 21 b. ing. Moreover, the 1st bead part 11 has the branch part 11a extended | stretched in the direction of the right side wall 8 between the bolt hole 21b and the bolt hole 21c.

  The second bead portion 12 has a front portion of the bracket member 10 in the vertical direction of the vehicle in the same manner as the first bead portion 11 from a close portion 25 (see FIG. 4) between the bracket member 10 and the control unit 6 in the vicinity of the opening 16 of the bracket member 10. It extends upward in the direction (see FIG. 2), and further reaches the upper surface of the bracket member 10 (see FIG. 4).

  Although the present invention has been described in detail based on examples, these examples are merely examples, and the present invention is not limited to the examples. It goes without saying that those skilled in the art can make various modifications or changes without departing from the technical idea of the present invention defined by the claims. For example, the outer shape of the bracket member can be variously changed according to the shape of the control unit to be stored. Further, the arrangement and the number of the bead portions provided in the bracket member are not limited to the above-described embodiment, and various changes are possible as long as the function of promoting the heat radiation of the control unit is achieved by serving as a passage for releasing hot air to the outside. is there.

  The control unit mounting structure according to the present invention can prevent damage to the control unit due to chipping or the like and promote heat dissipation of the control unit when installing the control unit in the engine room. It is useful as a control unit mounting structure installed in

The perspective view which shows the outline of the engine room which employ | adopted the attachment structure of the control unit of this invention The rear view which shows the bracket member used for the attachment structure of the control unit of this invention The bottom view which shows the bracket member used for the attachment structure of the control unit of this invention The cross-sectional view which shows the bracket member used for the attachment structure of the control unit of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine 6 Control unit 7 Dashboard 8 Right side wall 10 Bracket member 11 1st bead part 12 2nd bead part 16 Opening 20 Filter part 23 Connection terminal part 24 Gap part

Claims (2)

In a control unit mounting structure for fixing a control unit having a filter portion for adjusting internal pressure via a bracket member fixed in an engine room of a vehicle,
The bracket member is provided with a vertical bead portion extending at least in the vehicle vertical direction, and a branch bead portion extending from the vertical bead portion toward the side wall of the engine room,
The vertical bead portion is provided to be wider than the branch bead portion,
The control unit mounting structure, wherein the vertical bead portion is disposed so as to overlap a position where the filter portion is provided and extends to an end surface of the bracket member. The control unit is disposed on the vehicle rear side of a damper base that supports the upper end of the damper on the vehicle body,
2. The control unit mounting structure according to claim 1 , wherein the bracket member covers a dashboard side of the control unit as a back surface and covers at least a front surface and a bottom surface.

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