JPH0512299U - Insulator for engine room - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to improve the workability of installing the engine room insulator, suppress the increase in sound pressure at the corners in the engine room, and lower the noise level in the engine room. . [Structure] The insulator 10 is closely fixed to the center of the dash panel 20, and the left and right sides thereof are bent,
The corners of the engine room E are configured as a closed rear air chamber 30 by abutting and fixing the left and right side edges of the suspension mounting strut panel 21 and the front wheel house panel 22 that are easy to mount.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an engine room insulator.

[0002]

[Prior Art]

 In general, the engine room insulator is designed to absorb noise from the main engine and auxiliary equipment installed in the engine room, and to reduce the level of noise propagated inside or outside the vehicle compartment as much as possible. Has been done.

As an engine room insulator of this type, as shown in FIG. 4, a hood insulator 2 attached to the inner surface of the hood 1 covering the upper opening of the engine room E, and the engine room E and the vehicle compartment. An insulator dash front 4 installed on the front side of a dash panel 3 that divides the inside of the R is known.

As shown in FIG. 5, the insulator dash front 4 is provided with a sound insulating material such as a vinyl chloride sheet, a rubber sheet or the like on the front surface of the dash panel 3 or glass wool, felt, polyurethane foam or the like. I installed sound absorbing material.

However, when the conventional insulator dash front 4 is mounted, as shown in FIG. 5, the suspension mounting strut panel 5 and the front wheel house panel 6 come to a corner portion of the engine room E, so that it is very narrow. Since the terminal part of the insulator dash front 4 has to be fixed in such a space, the installation work is very troublesome, and depending on the panel shape, the terminal part may not be fixed.

[0006]

[Problems to be solved by the device]

 By the way, the noise in the engine room E is particularly remarkable at the corner portion near the terminal portion of the insulator dash front 4 due to the reflection of the panel. Therefore, unlike the conventional case, since the terminal portion of the insulator dash front 4 cannot be fixed, soundproofing measures are not taken in the parts of the engine room E where the sound pressure rises high. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an insulator for an engine room, which has improved sound absorption performance especially in a corner portion where the sound pressure is high in the engine room. To do.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an engine room insulator installed in an engine room, wherein the insulator is closely fixed to a central portion of a dash panel, and the left and right sides thereof are bent. The side edge part is fixed to the suspension mounting strut panel and the front wheel house panel so that the corner part of the engine room is configured as a sealed rear air chamber.

[0008]

[Action]

 As is clear from the above configuration, the left and right sides of the insulator are bent, and the side edges are brought into contact with the suspension mounting strut panel and the front wheel house panel surface, so that the engine where the sound pressure level is high is located. By making the corners of the room the air chamber behind the insulator, it is possible to prevent the sound pressure from rising at the corners as much as possible.

[0009]

【Example】

 Hereinafter, embodiments of an engine room insulator according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a partial perspective view showing a state in which an engine room insulator according to the present invention is installed in the engine room, and FIG. 2 is a plan view showing a state in which the engine room insulator according to the present invention is installed in the engine room, FIG. 3 is a graph showing a comparison between the present invention and the conventional example. In FIG. 1, the insulator dash front 10 is made of a laminated body in which non-woven fabrics 12 and 13 having water repellency are adhered to the front and back sides of a sound absorbing material 11 such as glass wool, felt, and urethane. The thickness is set to 2 to 30 mm.

The insulator dash front 10 is tightly fixed to the central portion of the dash panel 20, and the left and right side edge portions 14 are bent inward with the hinge portion 15 as a base point, and the suspension mounting strut is attached. It is fixed in contact with the panel surface of the panel 21 and the panel surface of the front wheel house panel 22.

Therefore, as shown in FIG. 2, the corner portion of the engine room E, where the sound pressure is significantly increased, serves as a rear air chamber 30 that is closed by the side edge portion 14 of the insulator dash front 10. Has been formed.

Since the insulator dash front 10 according to the present invention is constructed as described above and is installed in the engine room, first, the terminal portion of the insulator dash front 10 is installed in a narrow corner portion as in the conventional case. Instead, the strut panel for mounting the suspension 21 and the front wheel house panel 22 may be brought into contact with each other, so that there is an advantage that the mounting work can be performed easily and surely.

Further, since the corner portion of the engine room E is sealed as the rear air chamber 30 by the side edge portion 14 bent through the hinge portion 15, the rear air chamber 30 prevents the corner portion of the corner portion from being closed. The increase in sound pressure can be suppressed, and the sound pressure level in the engine room E can be reduced as a whole.

Next, the graph of FIG. 3 is a comparison between the present invention and the conventional example. As is apparent from the graph, the insulator dash front 10 according to the present invention shown in FIG. 1 is the conventional insulator dash front shown in FIG. It can be easily understood that the front 4 has reduced the noise in the range of 3 to 5 dB.

[0015]

[Effect of the device]

 As described above, the engine room insulator according to the present invention does not cover the front surface of the dash panel, but the strut panel for mounting the suspension and the front wheel house panel which are easy to mount the right and left side edges. By making contact with each other, the corners of the engine room are configured as a sealed back air chamber, which improves the workability of installing the insulator and suppresses the increase in sound pressure at the corners of the engine room. The noise level in the engine room can be remarkably reduced, and the soundproofing characteristics are excellent.

[Brief description of drawings]

FIG. 1 is a partial perspective view showing an embodiment of the present invention in which an insulator dash front is installed in an engine room.

FIG. 2 is a plan view showing a state where the insulator dash front shown in FIG. 1 is installed in an engine room.

FIG. 3 is a graph showing a comparison of soundproofing performance between the present invention and a conventional example.

FIG. 4 is a cross-sectional view showing an installation location of a conventional engine room insulator.

FIG. 5 is a perspective view showing an insulator dash front, which is an example of a conventional engine room insulator.

[Explanation of symbols]

 10 Insulator Dash Front 11 Sound Absorbing Material 12, 13 Nonwoven Fabric 14 Side Edge 15 Hinge Part 20 Dash Panel 21 Suspension Mounting Strut Panel 22 Front Wheel House Panel 30 Rear Air Chamber

Claims (2)

[Scope of utility model registration request] 1. An engine room insulator (10) installed in an engine room (E), wherein the insulator (10) is a dash panel (2).
0) is tightly fixed to the central part, and the left and right sides thereof are bent, and the side edge parts (14) are abutted and fixed to the suspension mounting strut panel (21) and the front wheel house panel (22). The engine room insulator is characterized by being configured as a back air chamber (30) in which a corner portion of the engine room (E) is sealed by the presence of the above. 2. An engine room insulator (10)
Is a non-woven fabric (12, 13) on the front and back sides of the sound absorbing material (11).
2. The engine room insulator according to claim 1, wherein each is attached.