JP2020082779A - Driving source chamber structure - Google Patents

Abstract

To provide a driving source chamber structure which can improve radiation performance of a driving source chamber while reducing noise in a cabin.SOLUTION: In this structure, front extension parts 42, 43 of a body side seal member 4 and a virtual extension line L1 of rear extension parts 52, 53 of a hood side seal member 5 are separated from each other in a Y direction, and a communication part A1 is formed, and therefore, radiation performance of a driving source chamber 20 can be improved. At this time, since the communication part A1 is formed between the front extension parts 42, 43 and the virtual extension line L1 which extend in an X direction, when a sound wave generated in the driving source chamber 20 passes through the communication part A1 and goes to an external space, a progress pathway of the sound wave toward the external space from the driving source chamber 20 is extended so as to be easily attenuated, thereby enabling to reduce noise in the cabin.SELECTED DRAWING: Figure 4

Description

The present invention relates to a drive source chamber structure.

Generally, in a vehicle, a drive source chamber accommodating a drive source such as an engine is formed in a front portion of the vehicle body, an opening of the drive source chamber is covered with a hood from above, and the hood can be opened and closed with respect to the vehicle body. Attached to. As a structure of such a drive source chamber, a structure in which a sealing member is provided between an engine room and a hood (hood) has been proposed (for example, refer to Patent Document 1). In the structure described in Patent Document 1, by providing the center seal and the side seal, it is possible to suppress sound from entering the vehicle interior from the engine room.

JP, 2013-49348, A

In the configuration in which the seal member is provided in the drive source chamber as described in Patent Document 1, in order to reduce noise in the vehicle interior, the seal member is provided so that the drive source chamber does not communicate with the external space. Is preferably sealed as much as possible. However, since the driving source generates heat during driving, if the driving source chamber is sealed, heat will be easily collected.

On the other hand, in order to radiate heat from the drive source chamber, it is preferable that the drive source chamber communicates with the external space so that air can easily pass therethrough. However, if the location where the seal member is not provided is set, noise may leak from the drive source chamber to the external space, and the noise may enter the vehicle interior. That is, it is difficult to achieve both reduction of noise in the vehicle interior and improvement of heat dissipation performance of the drive source compartment.

An object of the present invention is to provide a drive source chamber structure that can improve the heat radiation performance of the drive source chamber while reducing noise in the vehicle interior.

The drive source chamber structure of the present invention is a drive source chamber structure in which a drive source chamber is formed in a front portion of a vehicle body and a hood that can be opened and closed is provided so as to cover an opening of the drive source chamber from above. Then, the vehicle main body is provided with a main body side seal member which is capable of contacting the lower surface of the hood along the outer edge of the opening, and the lower surface of the hood is provided with the opening of the vehicle main body. A hood-side seal member is provided that can come into contact with a portion along the outer edge, and the main-body-side seal member includes a first width-direction extending portion that extends along the vehicle width direction behind the opening, and the first width-direction extending portion. A front extension that is continuous with the widthwise extension and extends forward on the side of the opening, and the hood-side seal member is the opening when the hood is closed. A second width direction extending portion that extends along the vehicle width direction in the front of, and a rear extending portion that is continuous with the second width direction extending portion and extends rearward on the side of the opening. The front extending portion is separated from the rear extending portion or a virtual extension line thereof in the vehicle width direction.

According to the drive source chamber structure of the present invention, it is possible to improve the heat radiation performance of the drive source chamber while reducing noise in the vehicle interior.

It is a perspective view showing a front portion of a vehicle body which constitutes a drive source room structure concerning a 1st example of the present invention. It is a perspective view which shows the hood which comprises the said drive source chamber structure. It is a top view which shows the said drive-source chamber structure typically. It is a top view which expands and shows the principal part of the said drive source chamber structure. It is sectional drawing which shows the principal part of the said drive source chamber structure. It is a top view which expands and shows the principal part of the drive source chamber structure which concerns on 2nd Example of this invention. It is a bottom view showing the hood which constitutes the above-mentioned drive source room structure. It is sectional drawing which shows the principal part of the said drive source chamber structure.

The invention described in claim 1 has a drive source chamber structure in which a drive source chamber is formed in a front portion of a vehicle body, and a hood that can be opened and closed is provided so as to cover an opening of the drive source chamber from above. Then, the vehicle main body is provided with a main body side seal member which can be in contact with the lower surface of the hood along the outer edge of the opening, and the lower surface of the hood is a portion of the vehicle main body along the outer edge of the opening. And a main body side seal member is continuous with the first width direction extending portion that extends along the vehicle width direction behind the opening. And a hood-side seal member that extends forward along the vehicle width direction in front of the opening when the hood is closed. It has a width direction extending part and a rear extending part which is continuous with the second width direction extending part and extends rearward on the side of the opening, and the front extending part and the rear extending part or The virtual extension line is separated from the imaginary extension line in the vehicle width direction.

The front extending portion of the main body side sealing member and the rearward extending portion of the hood side sealing member or a virtual extension line thereof are separated from each other in the vehicle width direction, so that these separated portions are separated from the drive source chamber and the external space. It becomes a communication part for communicating with and, and the heat radiation performance of the drive source chamber can be improved. At this time, the communication part is formed between the extending parts extending along the front-rear direction (or between the extending part and the virtual extension line), so that the sound wave generated in the drive source chamber is connected to the communicating part. When passing through to the external space, it is easy to proceed along the extension.

On the other hand, in the configuration in which the seal member extending in the predetermined direction is simply interrupted, the sound wave generated in the drive source chamber travels orthogonally to the seal member at the interrupted portion, and travels to the external space. Therefore, according to the present invention, it is possible to lengthen the traveling path of the sound wave traveling from the drive source room to the external space to facilitate attenuation and reduce the noise in the vehicle compartment.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. The drive source chamber structure 10A of the present embodiment is a structure of a front portion of the vehicle 100, and includes a vehicle body 2 in which the drive source chamber 20 is formed as shown in FIG. 1 and a hood 3 shown in FIG. Prepare In this embodiment, the vehicle front-rear direction (traveling direction) is the X direction, the vehicle width direction is the Y direction, and the vertical direction is the Z direction. Further, hereinafter, the front and rear in the X direction may be simply referred to as the front and rear, the center side of the vehicle 100 in the Y direction may be simply referred to as the inner side, the vehicle outer side may be simply referred to as the outer side, and the upper and lower sides in the Z direction may be simply referred to as the upper and lower sides.

A drive source chamber 20 is formed in the front portion of the vehicle body 2. The drive source chamber 20 is an engine room that accommodates, for example, an engine as the drive source 200 (see FIG. 4). The drive source chamber may house a motor as a drive source. Further, the drive source chamber 20 has an opening 20A that opens upward.

The vehicle body 2 has a cowl top garnish 21 extending along the Y direction behind the opening 20A and a front fender cover 22 extending along the X direction on the side of the opening 20A. The front fender cover 22 is disposed above the cowl side bracket 23, has a stopper fitting portion 221 that fits with a hood stopper rubber 31 described later, and is provided with a hinge 24 (see FIGS. 3 and 4).

As shown in FIG. 3, the vehicle main body 2 is provided with a main body side sealing member 4 along the outer edge of the opening 20A. The main body side seal member 4 is a weather strip composed of one continuous elastic member (for example, natural rubber, synthetic rubber, elastic resin, etc.), and the first widthwise extending portion 41 extending along the Y direction. And the front extending portions 42 and 43 extending along the X direction.

The first widthwise extending portion 41 is fixed to the upper surface of the cowl top garnish 21 and extends along the Y direction behind the opening 20A. The first widthwise extending portion 41 may be appropriately curved depending on the shape of the cowl top garnish 21 and the opening 20A. The front extending portions 42 and 43 are continuous with both ends in the Y direction of the first width direction extending portion 41, extend forward in the sides of the opening 20A, and are fixed to the upper surface of the front fender cover 22. .. In the present embodiment, the front extending portions 42, 43 are arranged on the upper surface of the front fender cover 22 along the inner edge of the opening 20A.

Further, the front extending portions 42 and 43 are arranged inside the hinge 24 in the Y direction so that the first width direction extending portion 41 does not straddle the hinge 24. That is, as will be described later, when the hood 3 is opened and closed, the main body side seal member 4 does not interfere with the hinge 24 and the hood 3, and deformation and displacement due to interference are suppressed.

The hood 3 covers the opening 20A of the drive source chamber 20 from above, and a rear portion thereof is supported by the vehicle body 2 by a hinge 24 so that the hood 3 can be opened and closed. A hood stopper rubber 31 and a hood-side seal member 5 are provided on the lower surface of the hood 3. The hood stopper rubber 31 is provided in the vicinity of rear end portions 521 and 531 of the hood-side seal member 5 described later for the purpose of absorbing a shock when the hood 3 is closed, and is fitted to the stopper fitting portion 231 on the vehicle body 2 side. To meet. A hinge mounting portion 32 to which the hinge 24 is mounted is set in a region behind the hood stopper rubber 31 on the lower surface of the hood 3.

Like the main body side seal member 4, the hood side seal member 5 is a weather strip composed of one continuous elastic member (for example, natural rubber, synthetic rubber, elastic resin, etc.), and extends in the second width direction. It is configured by the existing portion 51 and the rearward extending portions 52 and 53.

The second widthwise extending portion 51 is fixed to a portion along the front end edge of the lower surface of the hood 3, so that the second widthwise extending portion 51 extends along the Y direction in front of the opening 20A when the hood 3 is in the closed state. .. The rearward extending portions 52 and 53 are continuous with both ends in the Y direction of the second widthwise extending portion 51, and extend rearward at the side of the opening 20A when the hood 3 is in the closed state, It is fixed to a portion of the lower surface of the hood 3 along the side edge.

Here, the positional relationship between the main body side seal member 4 and the hood side seal member 5 will be described with reference to FIGS. In addition, in FIG. 4, the hood-side sealing member 5 when the hood 3 is in the closed state is shown by a dashed line. In addition, in the following description of the positional relationship, the hood 3 is in the closed state unless otherwise specified.

The rearward extending portions 52 and 53 of the hood-side sealing member 5 are in contact with the upper surface of the front fender cover 22 at rear end portions 521 and 531. At this time, the rear end portions 521 and 531 are arranged on the front side in the X direction with respect to the front end portions 421 and 431 of the front extending portions 42 and 43 of the main body side seal member 4. That is, the front extending portions 42 and 43 and the rear extending portions 52 and 53 do not overlap with each other when viewed in the Y direction and do not have overlapping portions. The other portion of the hood-side seal member 5 contacts the portion of the vehicle body 2 along the outer edge of the opening 20A.

Further, the front extending portions 42 and 43 are arranged inward in the Y direction with respect to a virtual extension line L1 that extends the rear extending portions 52 and 53 further rearward from the rear end portions 521 and 531 and are separated from each other. ing. That is, a communication portion A1 through which gas can pass is formed along the X direction between the front end portions 421, 431 and the rear end portions 521, 531. The main body side seal member 4 contacts the lower surface of the hood 3. Further, the front surface 201 of the drive source 200 is arranged in front of the communication part A1.

As described above, the main body side seal member 4 and the hood side seal member 5 form an open annular seal portion that is open at the two communicating portions A1.

Next, the flow of gas in the drive source chamber structure 10A will be described. The vehicle main body 2 is provided with a gas introduction portion, for example, in front of (front grille) or below the drive source chamber 20, so that air for cooling the drive source 6 can be introduced into the drive source chamber 20. It is like this. Therefore, as the vehicle 100 travels, air is introduced into the drive source chamber 20 and appropriately circulates. In particular, the air introduced into the drive source chamber 20 from the front collides with the front surface 201 of the drive source 200 and heads toward the rear extending portions 52, 53 on the outer side in the Y direction. On the other hand, the air introduced into the drive source chamber 20 from behind the drive source 200 goes around the drive source 200 toward the extending portions 42, 43, 52, 53.

At this time, since the front extending portions 42 and 43 are arranged on the inner side in the Y direction with respect to the virtual extension line L1 of the rear extending portions 52 and 53 and the communication portion A1 is formed, the inside of the drive source chamber 20 is formed. The air flows rearward along the X direction to pass through the communication portion A1 and head toward the external space.

Next, the progress of sound waves of noise generated in the drive source chamber 20 will be described. The drive source 200 generates noise when it is driven during traveling. The sound wave of this noise advances while being appropriately reflected in the drive source chamber 20, and attenuates as it advances. At this time, since the front extending portions 42, 43 and the virtual extension line L1 are separated from each other in the Y direction to form the communication portion A1, the sound waves that have reached the vicinity of the communication portion A1 are rearward on the outside in the Y direction. It advances along the extending portions 52 and 53 and heads to the external space.

On the other hand, in the configuration in which the seal member extending in the predetermined direction is simply interrupted, the sound wave generated in the drive source chamber 20 travels orthogonally to the seal member at the interrupted portion, and travels to the external space. Therefore, since the communication portion A1 is formed, the traveling path of the sound wave from the drive source chamber 20 to the external space becomes long.

According to this embodiment, the following effects can be obtained. That is, the front extending portions 42, 43 of the main body side sealing member 4 and the virtual extension line L1 of the rearward extending portions 52, 53 of the hood side sealing member 5 are separated in the Y direction to form the communication portion A1. As a result, the heat radiation performance of the drive source chamber 20 can be improved. At this time, since the communication portion A1 is formed between the front extension portions 42 and 43 extending along the X direction and the virtual extension line L1, the sound wave generated in the drive source chamber 20 is transmitted through the communication portion A1. When passing through to the external space, the traveling path of the sound wave from the drive source chamber 20 to the external space can be lengthened to facilitate attenuation, and noise in the vehicle interior can be reduced.

Further, the front extending portions 42, 43 are arranged on the inner side in the Y direction with respect to the virtual extension line L1 of the rear extending portions 52, 53 to form the communication portion A1, and the air in the drive source chamber 20 moves backward. By flowing toward the outside space by passing through the communication part A1, the air in the drive source chamber 20 can be easily discharged to the outside space during traveling, and the heat dissipation performance of the drive source chamber 20 can be further improved. Can be improved.

[Second Embodiment]
A second embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 6 to 8, the drive source chamber structure 10B of the present embodiment is obtained by further extending the rearward extending portions 52 and 53 of the drive source chamber structure 10A of the first embodiment rearward.

That is, in this embodiment, the hood-side seal member 5 has rear extending portions 54 and 55 that overlap the front extending portions 42 and 43 when viewed from the Y direction. At this time, the rear end portions 541 and 551 of the rear extending portions 54 and 55 are arranged rearward in the X direction with respect to the front end portions 421 and 431 of the front extending portions 42 and 43.

As described above, the front extending portions 42 and 43 and the rear extending portions 54 and 55 have the overlapping portion A2 which is overlapped with each other when viewed in the Y direction. Further, the front extending portions 42 and 43 are arranged inside and apart from the rear extending portions 54 and 55 in the Y direction. That is, between the front extending portions 42 and 43 and the rear extending portions 54 and 55, the communication portion A3 through which the gas can pass is formed along the X direction. The front surface 201 of the drive source 200 is arranged on the front side of the overlapping portion A2.

The front fender cover 22 includes an arrangement portion 221 in which the front extending portions 42 and 43 are arranged, an abutting portion 222 in which the rear extending portions 54 and 55 come into contact, and between the arrangement portion 221 and the abutting portion 222. And the formed recess 223. The recess 223 is formed by making the upper surface of the front fender cover 22 concave. As a result, compared with the configuration in which the recess 223 is not formed, the closed cross-section C1 surrounded by the front fender cover 22, the hood 3, the front extending portions 42 and 43, and the rear extending portions 54 and 55 is formed. The area becomes large.

Further, the recess 223 is formed so that the width (dimension in the Y direction) increases toward the rear side. In the illustrated example, assuming that the width of the portion where the rear end portions 541 and 551 of the rearward extending portions 54 and 55 contact is W1, the width W2 (<W1) is obtained on the front side of the width W1. Also on the rear side, the width is W3 (>W1), that is, the width changes in three steps.

According to the present embodiment as described above, in addition to the effects of the above embodiment, the following effects are obtained. That is, since the front extending portions 42, 43 and the rear extending portions 54, 55 have the overlapping portion A2, the noises that try to travel in the Y direction can be transmitted to the front extending portions 42, 43 and the rear extending portions. It can be blocked by either of the existing portions 54 and 55, and the leakage of noise from the drive source chamber 20 can be further suppressed. Further, it is possible to further lengthen and attenuate the traveling path when the sound wave passes through the communication portion A3.

Further, since the front fender cover 22 is formed with the recess 223, the area of the closed cross section C1 can be adjusted, and the frequency of noise that easily passes through the communication portion A3 (that is, the frequency to be attenuated) can be adjusted. You can Further, as compared with the configuration in which the recess 223 is not formed, the area of the closed cross section C1 can be increased, the amount of air passing through the communication portion A3 can be increased, and the heat dissipation performance can be further improved.

The present invention is not limited to the first embodiment and the second embodiment, and includes other configurations and the like that can achieve the object of the present invention, and the following modifications and the like are also included in the present invention. included.

For example, in the first embodiment and the second embodiment, the front extension portions 42, 43 are arranged on the inner side in the Y direction with respect to the virtual extension line L1 or the rear extension portions 54, 55. The front extending portion may be arranged outside in the Y direction. In such a configuration, the communication section opens toward the front side, but, for example, by disposing another member in front of the communication section, air is introduced from the communication section into the drive source chamber during traveling. You can suppress that.

Further, in the second embodiment, the concave portion 223 is formed between the arrangement portion 221 and the contact portion 222, but the concave portion is set in accordance with the frequency to be attenuated and the air passage amount. For example, when the dimension of the seal member in the Z direction is large and it is easy to secure the area of the closed cross section, the recess may not be formed.

Besides, the best configuration, method, and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited thereto. That is, the present invention is mainly illustrated and described mainly with respect to a specific embodiment, but without departing from the technical idea and the scope of the object of the present invention, the shape with respect to the embodiment described above Those skilled in the art can make various modifications in terms of material, quantity, and other detailed configurations. Therefore, the description limiting the shapes and materials disclosed above is described as an example for facilitating the understanding of the present invention, and does not limit the present invention. The description with the names of members excluding some or all of the above limitations is included in the present invention.

2 Vehicle main body 221 Arrangement part 222 Abutment part 223 Recessed part 3 Hood 4 Body side seal member 41 First width direction extending part 42, 43 Front extension part 5 Hood side sealing member 51 Second width direction extending part 52-55 Rear extension 20 Drive source room 20A Opening A2 Overlap L1 Virtual extension line

Claims (4)

A drive source chamber structure in which a drive source chamber is formed in a front portion of a vehicle body, and a hood that can be opened and closed so as to cover an opening of the drive source chamber from above is provided.
The vehicle main body is provided with a main body side seal member that can come into contact with the lower surface of the hood along the outer edge of the opening,
The lower surface of the hood is provided with a hood-side seal member capable of contacting a portion of the vehicle body along the outer edge of the opening,
The main body side sealing member is continuous with the first width direction extending portion extending along the vehicle width direction behind the opening portion and is continuous with the first width direction extending portion and is forward in the side portion of the opening portion. A front extending portion extending toward,
The hood-side sealing member is continuous with a second width-direction extending portion that extends along the vehicle width direction in front of the opening when the hood is in the closed state, and is continuous with the second width-direction extending portion. And a rearward extending portion that extends rearward on the side of the opening,
The drive source chamber structure, wherein the front extension portion and the rear extension portion or a virtual extension line thereof are separated from each other in the vehicle width direction. The drive source chamber structure according to claim 1, wherein the front extension portion and the rear extension portion have overlapping portions that overlap each other when viewed in the vehicle width direction in the closed state. The vehicle body includes an arrangement portion in which the front extension portion is arranged, a contact portion with which the rear extension portion contacts, and a recess formed between the arrangement portion and the contact portion. The drive source chamber structure according to claim 2, characterized by having. The drive source chamber structure according to any one of claims 1 to 3, wherein the front extending portion is arranged on an inner side in the vehicle width direction with respect to the rear extending portion or the virtual extension line. ..

Images