JP2014168981A - Mounting structure of electric component for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of an electric component for a vehicle which can reduce occurrence of failure caused by water immersion even when water intrudes in a cowl part without exposing an ECU to a high temperature, and can reduce effect on a layout of a component adjacent to the cowl part.SOLUTION: In a mounting structure for arranging an ECU 10 having a connector part 10A in a cowl part 1 arranged on a front side of a vehicle interior 2 and on a lower end side of a windshield 4, the cowl part 1 includes a dash panel 5 extending along a width direction and a vertical direction so as to partition the vehicle interior 2 and an outside of the vehicle interior, and a cowl panel 6 extending in an eave shape. The dash panel 5 includes a second inclined part 53 inclined more downward in the vertical direction toward a front side. The ECU 10 is mounted on the inclined part 53, and the connector part 10A is arranged on a back side from a front end part 6A of the cowl panel 6.

Description

  The present invention relates to a mounting structure for mounting a vehicle electrical component to a vehicle.

  Vehicle electrical components such as an engine control unit (hereinafter referred to as an ECU) have restrictions on the temperature of the usage environment in order to maintain performance. The engine room has many heat generating parts, so the ambient temperature is high, and there are restrictions on the arrangement of electrical parts. The electrical parts must be installed in a place where the ambient temperature is below the limit temperature. A cowl portion may be selected as an arrangement location of electrical components. The cowl portion is located on the rear side in the vehicle front-rear direction with respect to the engine room, on the front side in the vehicle front-rear direction with respect to the vehicle compartment, and on the lower end portion on the front side in the vehicle front-rear direction with respect to the windshield. Thus, since the cowl part is located in the lower end part of a windshield, the water etc. which transmitted the windshield may permeate in a cowl part. When an electrical component is disposed in the cowl, the electrical component may be damaged by water. 2. Description of the Related Art Conventionally, as a technique for arranging an ECU in a cowl part, a technique in which a waterproof partition part is provided in a cowl box defined at a position between a vehicle compartment and an engine room is known (for example, see Patent Document 1). In this prior art, since the ECU is disposed in the waterproof compartment, the possibility of failure of the ECU due to water exposure can be reduced.

JP-A-7-61293

  In the above prior art, since an opening for inserting the ECU is provided in the waterproof compartment, there is a possibility that water transmitted through the windshield may enter the waterproof compartment from this opening. Therefore, in order to prevent water from entering the waterproof compartment from this opening, it is necessary to provide another member for waterproofing in the opening. Further, when the opening is provided in the dashboard and the ECU can be inserted through the opening from the engine room side, it is possible to prevent water transmitted through the windshield from entering the waterproof compartment. However, the engine room and the opening communicate with each other, and high-temperature air in the engine room enters the waterproof compartment, so that the ECU is exposed to a high-temperature ambient temperature. Furthermore, if one side extending in the longitudinal direction is arranged along the vehicle front-rear direction, the length of the box-like portion where the ECU is arranged in the vehicle front-rear direction is increased, and the layout of other structures and parts adjacent to the waterproof compartment There is a problem of affecting the

  The present invention has been made in view of the above-mentioned problems, and without causing the electrical component to be exposed to a high-temperature atmosphere, even if water enters the cowl portion, the electrical component can be prevented from being damaged by water. It is an object of the present invention to provide a mounting structure for an electrical component for a vehicle that can be reduced and can reduce the influence on the layout of components adjacent to a cowl portion.

  In order to solve the above-described problems and achieve the object, according to an aspect of the present invention, an electrical component having a connector portion is disposed in a cowl portion disposed on the front side in the vehicle front-rear direction of the passenger compartment and on the lower end side of the windshield. In the mounting structure of the electrical component for a vehicle, the cowl portion includes a dash panel extending along the vehicle width direction and the vehicle vertical direction so as to partition the vehicle compartment and the vehicle exterior, and the vehicle front-rear direction front side from the upper portion of the dash panel And a cowl panel extending in a bowl-like shape toward the vehicle, and the dash panel is formed with an inclined portion that is inclined downward in the vehicle vertical direction toward the front side in the vehicle front-rear direction, and electrical components are attached to the inclined portion. The connector portion of the component is arranged on the rear side in the vehicle front-rear direction with respect to the front end portion of the cowl panel.

  In the above aspect, the cowl portion includes an under cowl panel that is positioned below the cowl panel in the vehicle vertical direction and extends from the dash panel. The under cowl panel extends from the front end of the cowl panel in a direction parallel to the surface of the inclined portion. Is preferably longer than the length of the inclined portion in the inclination direction.

  As the above aspect, it is preferable that at least one of the dash panel and the cowl panel is formed with a vent hole for communicating the vehicle interior and the cowl portion.

  As the above aspect, it is preferable that the engine room is disposed on the front side in the vehicle front-rear direction of the cowl part, and includes a cowl garnish having a wall part that partitions the engine room and the cowl part.

  As the above aspect, the cowl garnish is preferably formed with an internal / external communication hole for communication between the inside and outside of the vehicle.

  According to the present invention, it is possible to reduce the occurrence of a failure due to flooding of an electrical component even when water enters the cowl without exposing the electrical component to a high-temperature atmosphere, and the component adjacent to the cowl It is possible to realize a mounting structure for vehicle electrical components that can reduce the influence on the layout of the vehicle.

FIG. 1 is a perspective view of a vehicle to which a vehicle electrical component mounting structure according to an embodiment of the present invention is applied. FIG. 2 is a perspective view showing the main part of the vehicle to which the mounting structure for vehicle electrical components according to the embodiment of the present invention is applied. FIG. 3 is a perspective view of the main part of the vehicle showing a state in which the mounting structure of the vehicle electrical component according to the embodiment of the present invention is applied, the wire harness is removed, and the cowl garnish is removed. FIG. 4 is a perspective view of the main part of the vehicle showing a state in which the mounting structure of the vehicle electrical component according to the embodiment of the present invention is applied and the wire harness is attached and the cowl garnish is removed. . 5 is a cross-sectional view taken along the line VV in FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a cross-sectional view showing a water path during flooding in a state where a cowl garnish is not attached in the attachment structure for an electrical component for a vehicle according to the embodiment of the present invention. FIG. 8 is a cross-sectional view showing the arrangement of the wiper motor in the vehicle electrical component mounting structure according to the embodiment of the present invention. FIG. 9 is a cross-sectional explanatory view of a comparative example showing a layout when the longitudinal direction of the ECU is arranged along the longitudinal direction of the vehicle and a layout when the longitudinal direction of the ECU is arranged along the vertical direction of the vehicle. It is. FIG. 10 shows a state where the wiper motor is arranged in a layout when the longitudinal direction of the ECU is arranged along the longitudinal direction of the vehicle and a layout when the longitudinal direction of the ECU is arranged along the vertical direction of the vehicle. It is a section explanatory view of a comparative example.

  Below, the detail of the attachment structure of the electrical component for vehicles which concerns on embodiment of this invention is demonstrated based on drawing. The present embodiment is an attachment structure when an ECU is applied as an electrical component for a vehicle. In the present embodiment, the mounting structure is applied in the cowl portion 1 of the region A indicated by a circle in FIG.

(Composition of the cowl part)
As shown in FIGS. 1 to 5, the cowl portion 1 extends along the vehicle width direction on the vehicle front-rear direction front side of the passenger compartment 2, on the vehicle front-rear direction rear side of the engine room 3, and on the lower end side of the windshield 4. Are arranged. That is, the cowl portion 1 is located between the vehicle compartment 2 and the engine compartment 3. As shown in FIG. 5, the cowl portion 1 includes a dash panel 5 that extends along the vehicle width direction and the vehicle vertical direction so as to partition the compartment 2 and the exterior of the compartment (below the windshield 4), and the dash panel 5. A cowl panel 6 extending like a bowl from the upper part (upper edge) 5A of the panel 5 toward the front side in the vehicle front-rear direction, and an under cowl panel 7 extending from the lower part (lower edge) 5B of the dash panel 5 to the front side in the vehicle front-rear direction. Prepare.

  As shown in FIG. 5, the dash panel 5 includes a vertical portion 51, a first inclined portion 52, a second inclined portion 53, and a third inclined portion 54. The front end portion 6A of the cowl panel 6 is disposed so that the lower portion of the windshield 4 is located. The under cowl panel 7 includes a bottom plate portion 71 and a rising plate portion 72. As shown in FIGS. 5 to 7, the inner space 1 </ b> A of the cowl portion 1 extends along a direction indicated by an arrow B that is inclined so as to become lower from the rear side in the vehicle front-rear direction toward the front side. The longitudinal cross-sectional shape of the inner space 1 </ b> A in the vehicle front-rear direction is a substantially elliptical shape having a major axis in the direction indicated by the arrow B.

  The second inclined portion 53 is set so as to be substantially parallel to the direction indicated by the arrow B. That is, the 2nd inclination part 53 inclines so that the vehicle front-back direction front side may become low in the downward direction of a vehicle up-down direction. As shown in FIG. 6, the second inclined portion 53 faces the opening surface 1B from the front end of the cowl panel 6 to the upper edge portion of the rising plate portion 72 of the under cowl panel 7 with the inner space 1A interposed therebetween. Is formed. The distance L2 from the front end 6A of the cowl panel 6 to the upper edge of the rising plate 72 of the under cowl panel 7 is longer than the length L1 of the second inclined portion 53 in the inclination direction (arrow B). Is set.

  As shown in FIGS. 5 to 8, a plate-like bracket 9 is arranged on the inner side surface of the second inclined portion 53 so as to extend along the arrow B. An ECU 10 is attached to the surface of the bracket 9. The ECU 10 includes a connector portion 10A on one side in the longitudinal direction (arrow B direction in the figure). In the mounting structure according to the present embodiment, connector portion 10A is arranged so as to be positioned on the upper side in the direction indicated by arrow B. As shown in FIG. 3, the ECU 10 is disposed on the bracket 9. As shown in FIGS. 3 and 4, the ECU 10 is fixed by a bolt 11 to a bracket 9 (not shown in FIGS. 3 and 4) whose peripheral portion is located below the ECU 10. .

  As shown in FIG. 5, in the present embodiment, the vertical portion 51 of the dash panel 5 is formed with a ventilation communication hole 51 </ b> A that allows communication between the vehicle compartment 2 and the inner space 1 </ b> A of the cowl portion 1. This vent hole 51A is an outside air intake for introducing air into an air conditioner (not shown). The bottom plate portion 71 of the under cowl panel 7 is formed with a drainage communication hole 71A that communicates with the outside of the vehicle. The drainage communication hole 71 </ b> A ventilates the air in the inner space 1 </ b> A of the cowl portion 1 and allows water accumulated in the cowl portion 1 to be discharged to the outside of the vehicle.

  As shown in FIGS. 5 to 8, the front end portion 6 </ b> A of the cowl panel 6 is set so as to be positioned on the front side in the vehicle front-rear direction with respect to the connector portion 10 </ b> A of the ECU 10 disposed in the inner space 1 </ b> A of the cowl portion 1. Yes. That is, the connector portion 10A of the ECU 10 is attached so as to be disposed on the rear side in the vehicle front-rear direction with respect to the front end portion 6A of the cowl panel 6. As shown in FIG. 4, the wire harness connector 12 </ b> A of the wire harness 12 is connected to the connector portion 10 </ b> A of the ECU 10. The wire harness 12 in which the wire harness connector 12A is connected to the connector portion 10A is routed to the engine room 3 side through the suspension attachment portion 13.

(Composition of cowl garnish)
As shown in FIGS. 2 and 5, the cowl garnish 8 is disposed on the opening surface 1 </ b> B of the cowl portion 1. As shown in FIG. 5, the cowl garnish 8 has a wall portion 81 that partitions the engine room 3 and the cowl portion 1. The wall portion 81 of the cowl garnish 8 prevents high-temperature air in the engine room 3 from entering the cowl portion 1. The engine hood 31 is set on the upper end of the wall 81. As shown in FIG. 2, the cowl garnish 8 has a large number of slit-shaped inner and outer communication holes 82. Further, a waterproof wall 83 is formed on the inside of the cowl garnish 8 along the ECU 10 disposed in the cowl 1.

(Function and effect)
In the mounting structure of the ECU 10 according to the present embodiment, when the water W transmitted through the windshield 4 or the like flows into the cowl portion 1, as shown in FIG. The 10A side is not flooded. As shown in FIG. 5, when the cowl garnish 8 is attached, the possibility that the water that has entered from the inner and outer communication holes 82 of the cowl garnish 8 is wetted by the connector portion 10 </ b> A by the waterproof wall 83 is reduced. . In particular, in the present embodiment, the front end portion 6A of the cowl panel 6 is overhanged like a bowl so that the front end portion 6A of the ECU 10 is located on the front side in the vehicle longitudinal direction. For this reason, in this Embodiment, even if it is the state which removed the cowl garnish 8 by maintenance etc., it can prevent that 10A of connector parts apply | coat water. Therefore, in the mounting structure of the ECU 10 according to the present embodiment, it is possible to reduce the failure of the ECU 10 due to water.

  As shown in FIG. 8, in the mounting structure according to the present embodiment, the ECU 10 is arranged along the oblique direction (arrow B direction) with respect to the second inclined portion 53 of the cowl portion 1. Even if there are parts such as the wiper motor 14 for operating the wiper, the ECU 10 can be arranged avoiding such parts.

  9 and 10 show a comparison between a state in which the upper portion of the cowl portion 1 is extended toward the rear side in the vehicle longitudinal direction and a state in which the lower portion of the cowl portion 1 is extended downward in the vehicle vertical direction. An example is schematically shown. Even when the upper part of the cowl part 1 is extended toward the rear side in the vehicle front-rear direction, or when the lower part of the cowl part 1 is extended downward in the vehicle vertical direction, the opening surface 1B of the cowl part 1 is provided. It can be seen that when the tool is inserted from the arrow C, it is difficult for the tool to reach the fixed point of the ECU 10. As shown in FIG. 10, when components such as the wiper motor 14 are arranged on the cowl portion 1, the upper portion of the cowl portion 1 projects toward the rear side in the vehicle front-rear direction, and the lower side of the cowl portion 1 in the vehicle vertical direction. The overhang to the will become large.

  In contrast to the mounting structure as shown in FIG. 9, in the mounting structure of the present embodiment, as shown in FIG. 6, the tool is attached to the bracket 9 to which the ECU 10 is mounted with the cowl garnish 8 removed. There is an advantage that it is easy to reach and easy to see. As shown in FIG. 6, the distance L2 from the front end 6A of the cowl panel 6 to the upper edge of the rising plate 72 of the under cowl panel 7 is longer than the length L1 of the second inclined portion 53 in the inclination direction (arrow B). Is also set to be long. Thereby, when attaching ECU10 to the bracket 9 of the 2nd inclination part 53, it can make it easier to insert a tool. By attaching ECU10 like this Embodiment, it can prevent changing the structure of the cowl part 1 largely. In the mounting structure according to the present embodiment, the influence on the layout of other components around the cowl portion 1 can be reduced.

(Other embodiments)
Although the embodiment has been described above, the present invention is not limited to this. For example, in the above embodiment, the ECU 10 is applied as the vehicle electrical component. However, other electrical components may naturally be applied.

  In the above embodiment, the ECU 10 is attached to the second inclined portion 53 of the cowl portion 1. However, the dash panel 5 is substantially inclined downward in the vehicle vertical direction toward the front side in the vehicle front-rear direction. Any inclined portion may be used. Moreover, in the said embodiment, although ECU10 was fixed in the cowl part 1 via the plate-shaped bracket 9, it is not limited to the plate-shaped bracket 9. FIG.

  Further, in the above embodiment, the ventilation communication hole 51A is formed in the vertical portion 51 of the dash panel 5, but the ventilation communication hole may be formed in another part of the dash panel 5 or the cowl panel 6.

DESCRIPTION OF SYMBOLS 1 Cowl part 1A Inner space 1B Opening surface 2 Car compartment 3 Engine room 4 Windshield 5 Dash panel 6 Cowl panel 6A Front end part 7 Under cowl panel 8 Cowl garnish 9 Bracket 10 ECU (electrical parts)
10A connector portion 12 wire harness 12A wire harness connector 51 vertical portion (dash panel)
51A Ventilation hole 52 1st inclined part (dash panel)
53 Second slope (dash panel)
54 Third slope (dash panel)
71A Drain communication hole 72 Standing plate part 81 Wall part 82 Inside / outside communication hole

Claims (5)

In the vehicular electrical component mounting structure in which the electrical component having the connector portion is disposed in the cowl portion disposed on the front side in the vehicle longitudinal direction of the passenger compartment and on the lower end side of the windshield.
The cowl portion extends in a vehicle width direction and a vehicle vertical direction so as to partition the vehicle compartment and the vehicle compartment exterior, and extends in a bowl shape from the upper portion of the dash panel toward the front side in the vehicle front-rear direction. A cowl panel,
The dash panel is formed with an inclined portion that is inclined downward in the vehicle vertical direction toward the front side in the vehicle front-rear direction,
A mounting structure for an electrical component for a vehicle, wherein the electrical component is attached to the inclined portion, and the connector portion of the electrical component is disposed on the rear side in the vehicle front-rear direction with respect to the front end portion of the cowl panel. The cowl portion is located on the vehicle vertical direction lower side than the cowl panel, and includes an under cowl panel extending from the dash panel,
2. The vehicle according to claim 1, wherein a distance from a front end of the cowl panel to the under cowl panel in a direction parallel to the surface of the inclined portion is longer than a length of the inclined portion in the inclined direction. Electrical component mounting structure.   3. The vehicle electrical component according to claim 1, wherein at least one of the dash panel and the cowl panel is formed with a ventilation communication hole that allows communication between a vehicle interior and the cowl portion. Mounting structure. An engine room is disposed on the front side of the cowl portion in the vehicle longitudinal direction,
The mounting structure for an electrical component for a vehicle according to any one of claims 1 to 3, further comprising a cowl garnish having a wall portion that partitions the engine room and the cowl portion.   The vehicle electrical component mounting structure according to claim 4, wherein the cowl garnish is formed with an internal / external communication hole that allows communication between the inside and outside of the vehicle.

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