JP2010095009A - Arrangement structure for electronic component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arrangement structure for an electronic component that is superior in space efficiency and achieves the structural simplification even while ensuring cooling performance of an electronic component. <P>SOLUTION: The arrangement structure for an electronic component includes a side wall 2 provided by surrounding an engine room ER and formed into a closed cross-sectional shape having a hollow part 21, an insertion hole 26 opened in the side wall 2 so as to make the engine room ER and the hollow part 21 communicate with each other, and an engine control unit 1 exposed to both of the engine room ER and the hollow part 21 and provided in the insertion hole 26. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an arrangement structure of electronic components in a drive source mounting chamber (for example, an engine room) in which a drive source is mounted.

When an electronic component is mounted in a drive source mounting chamber in which a drive source such as an engine room is mounted, the electronic component is affected by the heat of the drive source in addition to its own heat generation. When an electronic component is affected by high heat, there is a risk of malfunction in operation, which may lead to a decrease in reliability.
Therefore, when such electronic components are arranged in a drive source mounting room such as an engine room that is likely to be heated to high temperatures, cooling using traveling wind is known, for example, from Patent Document 1 and the like. ing.
In this Patent Document 1, a duct for taking a traveling wind into a heat exchanger such as an intercooler is branched, and the branched duct is connected to a vehicle component to be cooled, and a plurality of vehicles are driven by the traveling wind taken into the duct. A technique for cooling parts is described.
JP 2007-113426 A

  However, the technique described in Patent Document 1 described above has a structure in which an existing duct is branched and communicated with a vehicle component to be cooled. For this reason, although vehicle parts can be cooled, the duct structure becomes complicated, leading to an increase in the number of parts, and there is a problem that the branch duct occupies the inside of the engine room and deteriorates the space efficiency of the engine room.

  The present invention has been made paying attention to the above-mentioned conventional problems, and while ensuring the cooling performance of the electronic component, the structure can be simplified and the electronic component excellent in space efficiency can be achieved. The purpose is to provide an arrangement structure.

  In order to achieve the above object, according to the present invention, an insertion hole is formed in the side wall surrounding one side of the drive source mounting chamber, and the drive source mounting chamber communicates with the partition space portion outside thereof. Is an arrangement structure of an electronic component that is exposed to both the drive source mounting chamber and the partition space.

In the electronic component arrangement structure of the present invention, the electronic component is exposed to the drive source mounting chamber and the partition space through the insertion hole opened in the side wall. Thus, since the electronic component is exposed to the partition space outside the drive source mounting chamber, it is cooled more than when it is arranged in the drive source mounting chamber.
As described above, in the present invention, since the insertion hole is provided in the side wall and the electronic component is provided in the insertion hole, the structure is simplified as compared with the structure in which the duct is branched and communicated with the case. Can be Further, since the electronic component is exposed to the drive source mounting chamber and provided in the insertion hole, it can be accessed from the opening, and the same maintainability as that installed in the drive source mounting chamber can be secured.
Furthermore, there is no need to route a cooling branch duct in the drive source mounting chamber, and part or all of the electronic components themselves can be disposed outside the drive source mounting chamber, resulting in excellent space efficiency.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The electronic component arrangement structure of the present embodiment includes a drive source mounting chamber (ER) in which a vehicle drive source is mounted, and an opening (4) that is open to be accessible to the drive source mounting chamber (ER). A side wall (2) provided to surround at least a part of the drive source mounting chamber (ER) and partitioning the drive source mounting chamber (ER) and a partition space portion (21) outside thereof; and the drive source The mounting chamber (ER) and the partition space portion (21) communicate with each other, the insertion hole (26) opened in the side wall (2), and the driving source mounting chamber (ER) in the insertion hole (26). ) And the electronic component (1) provided so as to be exposed in both the partition space portion (21).

  Based on FIGS. 1 to 3, an arrangement structure of an electronic component of Example 1 of the best mode of the present invention will be described.

  The electronic component arrangement structure A according to the first embodiment is applied to an arrangement of an engine control module (hereinafter referred to as ECM) 1 as an electronic component for controlling driving of an engine (not shown) as a drive source in a vehicle. Yes.

As shown in FIG. 2, the ECM 1 is mounted in an engine room (drive source mounting chamber) ER.
The engine room ER defines a pair of side walls 2 and 2 erected in the left-right direction of the vehicle, except for an opening portion in front of the vehicle for taking in the traveling wind, and a compartment MR and an engine room ER behind the vehicle. And a dash panel 3 erected. An opening 4 that allows access to the engine room ER for maintenance, maintenance, inspection, and the like is opened at the top of the engine room ER.
The opening 4 is covered with an engine hood 5 (see FIG. 1) so as to be opened and closed.

In the first embodiment, the ECM 1 is installed on the side wall 2 on the left side of the vehicle (in the drawings, the arrow LS indicates the left direction of the vehicle, the arrow FR indicates the front of the vehicle, and the arrow UP indicates the upper side of the vehicle). Yes.
The side wall 2 is formed with a wheel arch 2a that accommodates the tire T (see FIG. 3).

As shown in FIG. 1, the side wall 2 is formed in a closed cross-sectional shape having a hollow portion (partition space portion) 21. That is, the side wall 2 is formed in a substantially triangular cross-sectional shape by sandwiching both sides of the hollow portion 21 in the vehicle width direction between the front fender panel 22 and the side wall panel 23 and closing the lower side with the fender protector panel 24.
The side wall panel 23 is divided into a panel upper 23a and a panel lower 23b in the vertical direction. A hood ridge reinforcement 25 having a substantially square cross section is coupled to the upper portion of the panel lower 23 b, and the hood ridge reinforcement 25 extends along the side wall 2 in the vehicle front-rear direction.
In the first embodiment, the front fender panel 22 and the side wall panel 23 are made of metal, and both are joined by welding. In the first embodiment, the fender protector panel 24 is made of resin and is connected to the panels 22 and 23 by screwing. The fender protector panel 24 is made of metal. May be.

In the panel lower 23 b of the side wall panel 23 of the side wall 2, an insertion hole 26 that communicates the engine room ER and the hollow portion 21 is opened.
The insertion hole 26 is provided with the ECM 1 exposed to both the engine room ER and the hollow portion 21.

  The ECM 1 controls the ignition timing of the engine (not shown). As shown in FIGS. 2, 1, and 4, the ECM 1 includes a thin square box-like case 1c, and a plurality of cases are provided inside the case 1c. Contains electronic components. Also, thin plate-like support flanges 11 protrude outward at a plurality of locations on the outer periphery.

Further, the insertion hole 26 is formed to be slightly smaller than the ECM1. The ECM 1 is fixed by screwing the supporting flange 11 to the side wall panel 23 with the front surface 12 exposed to the engine room ER and the back surface 13 exposed to the hollow portion 21. As shown in FIG. 1, the ECM 1 is fixed to the insertion hole 26, and the outer periphery of the ECM 1 is placed on the surface on the engine room ER side of the outer peripheral edge of the insertion hole 26. It is press-contacted so that it can be cut off.
Further, a plurality of radiating fins 14 are erected on the back surface 13 of the ECM 1, and these radiating fins 14 are exposed to the hollow portion 21. In the first embodiment, at least the back surface 13 side of the case 1c is formed of a material having excellent thermal conductivity (for example, aluminum), and the radiation fins 14 are integrally formed of the material having excellent thermal conductivity. Yes.

The fender protector panel 24 is formed in a plate shape along the wheel arch 2a. As shown in FIG. 3, the fender protector panel 24 is a rear portion of the fender protector panel 24 and introduces outside air into the hollow portion 21 at a position below the ECM1. An outside air introduction port (outside air introduction portion) 27 is opened.
As shown in the figure, the outside air inlet 27 is provided with a plurality of ribs 27a, and the slits 27b formed between the ribs 27a are directed obliquely upward in the front of the vehicle.

Further, in the hollow portion 21, an intake port 7 a of an intake duct (fan formation unit) 7 of an engine (not shown) is opened at a position ahead of the vehicle from the ECM 1.
The intake duct 7 extends in the hollow portion 21 forward of the vehicle, is then bent toward the center of the vehicle, passes through the side wall panel 23, and extends into the engine room ER (see FIG. 2). .

  In addition, a lamp unit (not shown) and a bumper 8 are provided above and below the front end of the side wall 2, and a hole or a gap through which a wiring, a support member, or the like is inserted is provided in these installation portions. The part 21 and the outside communicate with each other. Therefore, a seal member 9 that partitions the hollow portion 21 from the outside is provided at the front end portion of the hollow portion 21.

Next, the operation of the first embodiment will be described.
When the engine is driven, the engine takes in air from the intake duct 7. Therefore, in the hollow portion 21 of the side wall 2, as shown by the arrow W in FIG. 3, air blowing from the outside air introduction port 27 toward the intake port 7 a is formed. When the wind speed in the vicinity of the intake port 7a of the intake duct 7 was measured, it was 2 m / s or more.
Since the back surface 13 of the ECM1 is exposed to the hollow portion 21 in which air blown by outside air lower in temperature than the engine room ER internal temperature is formed, the ECM1 is cooled more than that in which the ECM1 is installed in the engine room ER. It can prevent functional degradation.
Moreover, a plurality of radiating fins 14 are erected on the back surface 13 of the ECM 1, and efficient cooling is possible as compared with a case where the radiating fins 14 are not provided.
Then, the intake duct 7 is routed in the hollow portion 21 and air is formed in the hollow portion 21 when the engine is driven. Therefore, the air is also formed even when the vehicle is stopped when no traveling wind is generated, thereby further cooling the ECM 1. be able to.

Furthermore, since the sealing member 9 is provided at the front end of the hollow portion 21 in the vehicle, outside air enters the hollow portion 21 through a hole or a gap provided in a bumper 8 or a lamp installation portion at the front end of the hollow portion 21. Is prevented.
Therefore, when the vehicle stops, the blow-back of hot air in the engine room ER is prevented from entering from the hole or the like in the front part of the hollow part 21, and the hollow part 21 is kept at a lower temperature than the engine room ER. Cooling performance can be improved.

When the temperature inside the engine room ER and the temperature of the hollow portion 21 were measured at a high temperature exceeding 40 ° C., the former exceeded 50 ° C. while the latter was less than 50 ° C. Yes, the hollow portion 21 is cooler than the engine room ER, but the temperature difference is small.
On the other hand, when idling was stopped under the same outside air conditions, the former exceeded 90 ° C after 5 minutes, whereas the latter was 70 ° C or lower. Furthermore, after 20 minutes, the former exceeded 100 ° C., whereas the latter was 90 ° C. or lower.
In this way, particularly when the vehicle is idling, the hollow portion 21 is kept at a significantly lower temperature than the engine room ER, and the ECM 1 can be cooled more than when placed in the engine room ER. Thus, since the hollow portion 21 is partitioned from the engine room ER, it is kept at a low temperature, and the hot air from the engine room ER is blocked by the seal member 9 as described above. Even when the vehicle is idling when there is no running wind, it is reliably kept at a low temperature.

In the outside air introduction port 27, a slit 27b is formed forward and upward by the rib 27a. The direction of the slit 27b is opposite to the direction in which water or muddy water jumps up due to the rotation of the tire T during forward travel, and the intrusion of muddy water into the hollow portion 21 is suppressed, and the slit 27b is clogged. Is suppressed.
Moreover, the hollow portion 21 in which the air inlet 7a of the air intake duct 7 is disposed is partitioned from the passenger compartment MR, and the side wall panel 23 is interposed between the engine compartment ER. For this reason, compared with the case where the intake port 7a of the intake duct 7 is opened to the engine room ER, the intake sound is prevented from entering the passenger compartment MR.

  Further, since the ECM 1 is arranged on the side wall 2, as compared with the conventional one in which the ECM 1 is arranged in the branch duct routed in the engine room ER, the structure can be simplified because the branch duct is unnecessary. Space efficiency can be improved by expanding the effective volume of the engine room ER.

  Next, since the surface 12 of the ECM 1 is exposed to the engine room ER during maintenance and inspection of the ECM 1, when the engine hood 5 is opened and the opening 4 is opened, maintenance and inspection and replacement of the ECM 1 are performed. be able to.

As described above, the electronic component arrangement structure A according to the first embodiment has the following effects.
a) The ECM 1 was provided in the insertion hole 26 opened in the side wall 2 so as to be exposed to the engine room ER and the hollow portion 21.
Therefore, compared with what installed ECM1 in the engine room ER, ECM1 is exposed to the hollow part 21 lower temperature than the engine room ER, and can cool ECM1. In addition, the ECM1 can be simplified by omitting the branch duct and expanding the effective volume of the engine room ER compared to the ECM1 installed in the branch duct routed in the engine room ER. In addition, space efficiency can be improved.
In addition, since the ECM 1 is exposed to the engine room ER, maintenance performance equivalent to that in which the ECM 1 is installed in the engine room ER can be secured. Compared to the ECM1 installed outside the engine room ER, the ECM1 can be placed closer to the engine, the length of the harness connecting the ECM1 and the power supply and actuator can be shortened, and the wiring work is simplified. it can.

  b) Since a plurality of heat radiation fins 14 are erected on the back surface 13 exposed to the hollow portion 21 in the ECM 1, heat radiation can be performed more efficiently than that provided with heat radiation fins only on the engine room ER side, and cooling performance can be improved. Can be improved.

  c) Since the outside air introduction port 27 is opened in the hollow portion 21 of the side wall 2 to introduce outside air, the hollow portion 21 is made to have a lower temperature compared to the case where the outside air introduction port 27 is not provided, Cooling of the ECM 1 can be facilitated.

d) In the hollow portion 21, the intake port 7 a of the intake duct 7 of the engine is opened on the opposite side of the outside air introduction port 27 across the installation position of the ECM 1.
Therefore, when the engine is driven, even when the traveling wind is not generated, air blowing from the outside air introduction port 27 to the air intake port 7a is formed, and the ECM 1 is exposed and cooled by this air blowing. For this reason, the cooling performance of the ECM 1 is improved as compared with the case where the outside air inlet 27 is simply opened. In addition, the cost can be reduced as compared with a case where a dedicated fan or the like for forming the air blow is separately provided in the hollow portion 21.
Further, since the air inlet 7a is opened in the hollow portion 21, it is possible to suppress the intake sound from entering the vehicle compartment MR as compared with the case where the air inlet 7a is opened in the engine room ER.

  e) In the outside air introduction port 27, since the slit 27b is formed upward in the vehicle by the rib 27a, it is possible to suppress the intrusion of muddy water into the hollow portion 21 and to prevent clogging in the slit 27b.

  f) A seal member 9 is provided at the front end of the hollow portion 21 to prevent outside air from entering the hollow portion 21 through a hole or gap in front of the hollow portion 21. Therefore, when idling stops or the like, hot air blown back from the engine room ER is prevented from entering the hollow part 21, and the hollow part 21 is reliably kept at a lower temperature than the engine room ER to improve the cooling performance of the ECM 1. it can.

g) When installing the ECM 1 in the insertion hole 26, the outer peripheral edge portion of the ECM 1 was pressed against the outer peripheral edge portion of the insertion hole 26 so as not to cause air flow between them.
Therefore, during intake of the intake duct 7, the air blowing from the engine room ER to the hollow part 21 is suppressed through the insertion hole 26, and hot air in the engine room ER is prevented from entering the hollow part 21. it can. Therefore, the cooling performance of the ECM 1 can be ensured by keeping the hollow portion 21 at a low temperature.

(Other examples)
Other embodiments will be described below. Since these other embodiments are modifications of the first embodiment, only the differences will be described, and the configuration common to the first embodiment or the other embodiments will be described. The description is omitted by giving a common reference numeral.

The arrangement structure of the electronic component according to the second embodiment will be described with reference to FIGS. 4 and 5.
The second embodiment is an example in which the ECM 1 is installed at a different position from the first embodiment, and the ECM 1 is installed on the cowl top 200 shown in FIG.

That is, in the cowl top 200, an air intake space portion (compartment space portion) 204 surrounded by the cowl top outer 201, the cowl top inner 202, the cowl top cover 203, and the dash panel 3 extends in the vehicle width direction. .
The air intake space 204 communicates with the outside of the vehicle through an outside air introduction port 203a opened in the cowl top cover 203, and also communicates with an intake portion of an in-vehicle air conditioner (not shown).

  At both ends in the vehicle width direction of the cowl top 200, bulge portions 205 that are continuous with the side wall 2 while bulging forward are formed.

  As shown in FIG. 5, in the bulging portion 205, the air intake space portion 204 is covered with the cowl top outer 201 and the front fender panel 222 on both sides in the vehicle width direction, and the cowl top cover side 206 and the fender protector on the upper and lower sides. Covered with a panel 224.

  A front side member 207 extending in the vehicle longitudinal direction with a closed cross section is coupled to the lower part of the cowl top outer 201, and the fender protector panel 224 extends in the vehicle longitudinal direction with a closed cross section. A hood ridge reinforcement 225 is coupled.

The cowl top outer 201 is formed with an insertion hole 226 that allows the engine room ER and the air intake space 204 to communicate with each other. The insertion hole 226 is closed and exposed to the engine room ER and the air intake space 204. , ECM1 is installed.
As in the first embodiment, the ECM 1 is fixed to the cowl top outer 201 by screwing a flange 211 protruding from the outer periphery thereof.
Further, the seal member 210 seals between the outer peripheral edge portion of the ECM 1 and the outer peripheral edge portion of the insertion hole 226.

In the second embodiment, traveling air is introduced into the air intake space 204 during traveling. Therefore, the ECM 1 is cooled by the traveling wind.
In addition, even when the vehicle is stopped, when the air conditioner (not shown) is operated in the outside air introduction state, the air in the air intake space portion 204 is sucked into the air conditioner, so that air is formed, and the ECM 1 Is cooled by this ventilation.

  Similarly to the first embodiment, since the ECM 1 is exposed and installed in the engine room ER, if the engine hood 5 is flipped up to open the opening 4, Similarly, maintenance inspection and replacement work can be performed.

Other operations are the same as those in the first embodiment, and a description thereof will be omitted.
Moreover, based on the structure similar to Example 1, also in Example 2, the effect described in a) b) c) g) can be acquired. In particular, with regard to the effect described in g), in the second embodiment, since the seal member 210 is provided between the ECM 1 and the insertion hole 226, the hot air can be more easily entered from the engine room ER into the air intake space 204. It can be surely prevented and the cooling performance of the ECM 1 can be improved.

The arrangement structure of the electronic component of Example 3 will be described with reference to FIG.
The third embodiment is a modification of the first embodiment, and the structure of the side wall 302 is different from that of the first embodiment.
The side wall 302 includes the same front fender panel 22, side wall panel 23, and fender protector panel 24 as in the first embodiment.

In the third embodiment, the hood ridge reinforcement 325 and the front side member 307 extend in the vehicle front-rear direction above and below the insertion hole 326 opened in the side wall panel 23.
Other configurations are the same as those of the first embodiment, and the same effects as those of the first embodiment are achieved.

  As described above, the embodiment and Examples 1 to 3 of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment and Examples 1 to 3, but the present invention. Design changes that do not depart from the gist of the present invention are included in the present invention.

  For example, in the first to third embodiments, the ECM 1 is shown as the electronic component. However, the electronic component is not limited to this, and any electronic component installed in the drive source mounting chamber may be a transmission, a brake, a suspension, a drive transmission system, or the like. It can be applied to other electronic parts such as electronic parts for control.

  Moreover, in Examples 1-3, although the engine was mentioned as an example as a drive source mounted in a drive source mounting chamber, it is not limited to this, You may mount other drive sources, such as a motor. Further, in the first to third embodiments, the engine room ER serving as the drive source mounting chamber is shown as being provided in the front portion of the vehicle. You may provide in other site | parts, such as the lower part of a chamber.

  Moreover, in Examples 1-3, the side wall 2 of the edge part of the vehicle width direction of a vehicle and the example provided in the corner part of the side wall 2 and the cowl top 200 as a side wall in which the penetration hole which installs an electronic component is formed. However, the present invention is not limited to this, and as long as the side wall is provided so as to surround the drive source mounting chamber, it may be provided on the wall provided in the front-rear direction of the drive source mounting chamber, such as a dash panel. Moreover, although the hollow part 21 of the closed cross section was shown as a partition space part of the side wall, the partition space part is not limited to the hollow part as long as it is partitioned from the drive source mounting chamber by the side wall. . For example, the partition space portion may have a portion opened to the outside of the vehicle instead of being hollow.

Moreover, in Examples 1-3, although the example which installed the radiation fin 14 upright was shown as a heat radiating member, as a heat radiating member, it is not limited to a heat radiating fin and is exposed to the partition space part of an electronic component. Other parts, such as those made of materials that have better thermal conductivity than other parts, such as aluminum, or those that have added heat-dissipating members that can provide a heat pump action A member may be used.
Furthermore, in electronic components, the part exposed to the drive source mounting chamber is covered with a heat insulating or heat insulating material such as fiber or resin that has heat insulation or heat insulation, so that it is not easily affected by the heat from the drive source. Also good.

  Further, in the first embodiment, the intake duct of the engine is shown as the blower forming means, and in the second embodiment, the air conditioner is shown as the blower forming means. However, the blower forming means is not limited to this. For example, the outside air introduction port may be opened upstream of the air generated during traveling with the electronic component interposed therebetween, and the outside air outlet may be opened downstream, so that the air is formed in the hollow portion as the vehicle travels. Or you may provide the fan only for cooling of an electronic component etc. in a hollow part.

  In the first and second embodiments, the slit-like outside air introduction ports 27 and 203a are shown as the outside air introduction portion. However, the present invention is not limited to this, and any small hole may be used as long as the compartment space portion communicates with the outside. Other shapes may be used.

It is a longitudinal cross-sectional view which shows the arrangement structure A of the electronic component of Example 1 which is the best mode for carrying out the present invention. 1 is a perspective view showing an electronic component arrangement structure A of Example 1. FIG. 1 is a longitudinal sectional view illustrating a main part of an electronic component arrangement structure A of Example 1. FIG. It is a perspective view which shows the arrangement structure of the electronic component of Example 2. FIG. It is a longitudinal cross-sectional view which shows the arrangement structure of the electronic component of Example 2, Comprising: The state cut | disconnected by S5-S5 of FIG. 4 is shown. It is a longitudinal cross-sectional view which shows the arrangement structure of the electronic component of Example 3.

Explanation of symbols

1 Engine control unit (electronic parts)
2 Side wall 4 Opening 7 Intake duct 7a Inlet 14 Heat radiation fin (heat radiation member)
21 Hollow part (partition space part)
26 Insertion hole 27 Outside air introduction port (outside air introduction part)
200 cowl top (side wall)
203a Outside air introduction port (outside air introduction part)
204 Air intake space (partition space)
226 Insertion hole 302 Side wall 326 Insertion hole ER Engine room (drive source mounting room)

Claims (6)

A drive source mounting chamber in which the drive source of the vehicle is mounted;
An opening that is open to allow access to the drive source loading chamber;
A side wall that surrounds at least a portion of the drive source mounting chamber and divides the drive source mounting chamber and a partition space portion outside thereof;
An insertion hole opened in the side wall in communication with the drive source mounting chamber and the partition space portion;
In this insertion hole, an electronic component that is exposed to both the drive source mounting chamber and the partition space, and
An electronic component arrangement structure characterized by comprising:   2. The electronic component arrangement structure according to claim 1, wherein a heat radiating member is provided in a portion exposed to the partition space in the electronic component.   The arrangement structure of the electronic component according to claim 1, wherein an outside air introduction portion that introduces outside air into the partition space portion is provided on the side wall.   The arrangement structure of the electronic component according to claim 3, wherein an air blowing forming unit configured to form air blowing from the outside air introduction portion toward the electronic component is provided in the partition space portion.   The blower forming means is an intake duct of an internal combustion engine as the drive source, wherein an intake port is disposed at a position opposite to the outside air introduction port across the electronic component in the partition space portion. The arrangement structure of an electronic component according to claim 4.   5. The vehicle-mounted air conditioner in which the air blowing means is an outside air intake port disposed at a position opposite to the outside air introduction port across the electronic component in the partition space portion. Electronic component arrangement structure.

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