JPH04135918A - Air intake structure for automobile - Google Patents

Abstract

PURPOSE:To reduce noise ion the passenger compartment by providing an air duct incorporated with an outside and inside air change-over door on a dash board so that it is communicated with an air-box which is incorporated in the front section of an upper cowl member within an air intake structure, when a bonnet is closed, thereby air is introduced into an air-conditioning means by way of a air blowing means arranged upstream of the air duct. CONSTITUTION:A communication duct 34 is laid along the longitudinal direction of a vehicle body so that it is communicated with an inside circulation opening 18a opened at a dash board 128 and is also communicated with an opening 32b of an air box 32 when a bonnet 12 is closed. Further, an air intake port 34a is formed in the center part of the communication duct 34 so that the introduction of the outside and inside air is changed over by a shutter valve 52 disposed in the air intake port 34a which is also connected to a blower unit 50 that is in connected to an air-conditioning unit 54. With this arrangement, the blower unit 50 can be arranged outside of the passenger compartment, thereby it is possible to reduce the noise in the passenger compartment.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an opening formed in a bonnet that is located further forward than a cowl upper member that is installed in a state that is located forward of a dash panel. The present invention relates to an air introduction structure for an automobile, which includes an air box that receives outside air introduced through the air box.

[Prior Art] Conventionally, as shown in, for example, Japanese Utility Model Application Publication No. 63-196712, a structure in which an air conditioner for an automobile is disposed behind a dash panel is well known.

That is, as shown in FIG. 6, the outside air intake opening formed in the dash panel a is communicated with the front unit f of the air conditioner e through the communication duct d extending toward the passenger compartment C side. The communication duct d is formed with an opening g for taking in air inside the vehicle interior C.

By appropriately driving a shutter member that selectively closes and opens these two openings G and G, internal and external air can be switched.

[Problem to be solved by the invention] However, in such a conventional air conditioner e,
Since the pro-air unit f as a ventilation means is arranged in the vehicle interior C, the air blowing noise generated by the pro-a unit f acts as noise to the driver and fellow passengers, contributing to the deterioration of the interior environment of the car. It becomes.

In addition, since such a pro unit f is installed,
As a result, the space inside the car became narrower, and improvements were requested.

Furthermore, as shown in Fig. 6, if the length of the communication duct d is set to be long, the pro-aper unit f will be separated from the dash panel a, and the space inside the vehicle interior C will become narrower. The length of is set to be as short as possible. Therefore, the size of the opening g for internal air intake formed in this communication duct d is also small (limited). The flow velocity of the passing air at point g increases, and therefore, when passing through this point, a large wind noise is generated, which causes new noise.

This invention was made in view of the above-mentioned problems, and the purpose of this invention is to reduce the noise in the vehicle interior caused by the air blowing noise and to expand the space inside the vehicle by eliminating the pro-air unit from the vehicle interior. An object of the present invention is to provide an air introduction structure for an automobile.

Another object of the present invention is to reduce the wind noise generated there by setting the opening area for inside air intake sufficiently wide, thereby reducing the noise inside the vehicle interior. The purpose is to provide an introductory structure.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the air introduction structure for an automobile according to the present invention is arranged further forward than the cowl upper member that is attached in a state that is located forward of the dash panel. equipped with an air box that receives outside air introduced through an opening formed in the hood.
In the air introduction structure of an automobile, the air introduction structure is attached to the front face of the dash panel in a state where it communicates with an opening formed therein, and extends forward from the dash panel;
an air duct with an open front end; an arrangement means for arranging the air box so as to communicate with the opening of the air duct when the bonnet is closed; It is characterized by comprising a switching means for switching and a blowing means disposed below the switching means, and through the blowing means, air is guided to an air conditioning means provided on the indoor side. .

Further, in the air introduction structure for an automobile according to the present invention, a closed space forming member is attached to the rear surface of the dash panel in a state communicating with an opening formed in the dash panel, and forms a closed space with the dash panel. The closed space forming member is characterized in that an inside air intake port for introducing inside air is formed in the closed space forming member.

[Function] In the automobile air introduction structure configured as described above, the air blowing means as the pro-a unit is disposed below the midway portion of the air duct that projects forward from the dash panel. In this way, the air blowing noise generated by the air blowing means is blocked by the dash panel, making it difficult for it to be transmitted into the vehicle interior, and as a result, the noise level based on the air blowing noise inside the vehicle interior is extremely reduced. Furthermore, since the ventilation means is moved from the passenger compartment to the engine compartment, the space within the passenger compartment becomes larger, allowing for a more spacious interior layout.

[Embodiment] Below, the configuration of an embodiment of the air introduction structure for an automobile according to the present invention will be described in detail with reference to FIGS. 1 to 5 of the accompanying drawings.

As shown in FIG.
2 and a dash panel 18 that partitions the engine room 14 and the vehicle interior 16, and an outside air introduction structure 10A that introduces outside air into the vehicle interior 16; 16, and an internal air circulation structure 10B for circulating the air within the interior air circulation structure 10B.

That is, the vehicle body 1 to which the air introduction structure of this embodiment is applied
0, the bonnet 12 that freely covers the upper part of the engine compartment 14 is connected to the front windshield 20.
In order to achieve a flat surface surface, they are joined so as to form approximately the same plane.In detail, a garnish 22 is connected to the lower end of this front windshield 20, and this The garnish 22 is formed so as to extend in the vehicle width direction.On the other hand, the bonnet 12 disposed in front of the garnish 22 is configured to cover the garnish 2 when the engine compartment 14 is closed.
It is set so that it extends smoothly in continuation with 2.

As shown in FIG. 2, the bonnet 12 is rotatably supported at both rear ends by hinge mechanisms 26 on wheel aprons 24 that respectively define left and right sides of the engine room 14. The center of rotation of this hinge mechanism 26 is indicated by the symbol CP in FIG. Also,
As shown in FIG. 3, an inner panel 28 is attached to the lower surface of the rear side of the bonnet 12 in the vehicle width direction in order to ensure the rigidity of the bonnet 12. That is, a closed space is defined by the rear part of the bonnet 12 and the inner panel 28 attached to the lower surface thereof.

On the other hand, as shown in FIG. 1, at the rear of the bonnet 12, a large number of slits 30 for introducing outside air extend along the longitudinal direction of the vehicle body, excluding both ends thereof. They are formed side by side in the width direction. Here, each slit 30 is connected to the inner panel 2 described above, as shown in FIG.
It is formed in a state where it communicates with the closed space defined by 8. On the other hand, the lower surface of the inner panel 28 is in communication with the lower surface of the inner panel 28 through a first opening 28a formed therein.
An air box 32 is attached across the vehicle width direction. The air box 32 is configured to temporarily receive the outside air introduced through the slit 30 described above, and also function as a drainage box for receiving rainwater introduced together with this outside air.

As is clear from FIGS. 3 and 4, this air box 32 has a high bottom surface at the center in the vehicle width direction and a low bottom surface at both ends in the vehicle width direction. In this embodiment, as shown in FIG. 3, a drain hole 32a for draining water is formed on the bottom surface of the left end.In addition, a drain hole 32a for draining water is formed on the rear surface of the left end where the drain hole 32a is formed. A second opening 32b is formed which communicates with a communication duct 32, which will be described later.

Here, as shown in FIG. 5, outside air introduced through the slit 30 is prevented from entering the air box 32 directly into the communication duct 32 through the second opening 32b. A baffle plate 36 is installed for this purpose. In addition, when the bonnet 12 is closed, the above-mentioned drain hole 32a of this air box 32 is
A drain hose 38 is provided on the vehicle body side so as to come into contact with the lower surface of the left end portion of the air box 32. This drain hose 38 is connected to this air box 32.
This drain hose 38 is used to guide rainwater accumulated inside the vehicle to the outside of the vehicle, and if the drain hole 30 is formed at an appropriate position so that rainwater can be directly led out of the vehicle, this drain hose 38 is unnecessary. It is.

In addition, as shown in FIG. 3, the dash panel 18 described above
The upper edge is formed to be largely curved along the curved surface of the lower edge of the front windshield 20. The rear end edge of the cowl upper 40 is fixed to the upper end edge of the dash panel 18. This cowl upper 4
The front edge of 0 extends to the front of the garnish 22 described above. That is, the upper end of the rear part of the engine room 14 is defined by the front edge of the cowl upper 40. Moreover, the bonnet 12 mentioned above is the engine room 1
4 is closed, the front end edge of the cowl upper 40 is set to abut against the lower surface of the rear end edge of the bonnet 12 via a seal rubber 42 so that the rear end portion of the bonnet 12 is sealed. There is.

On the other hand, a third opening 18a for circulating inside air into the vehicle interior 16 is formed at the left end of the dash panel 18. The above-mentioned communication duct 34 is fixed to the front surface of the left end portion of the dash panel 18 in a state where it communicates with the third opening 18a. This communication duct 34 extends forward along the longitudinal direction of the vehicle body, and its tip is
When the above-mentioned bonnet 12 closes the engine compartment 14, the bonnet 12 terminates at a position abutting the rear surface of the air box 32 so as to communicate with the second opening 32b of the air box 32 attached to the lower surface of the bonnet 12. There is. A seal rubber 44 is attached to the front edge of the communication duct 34 in order to keep it in fluid tight contact with the air box 32.

Further, in the inside air circulation structure 10B described above, a cowl lower 46 is fixed to the rear surface of the dash panel 18 in a state in which it communicates with the third opening 18a. The cowl lower 46 is attached to form a closed space with the dash panel 18 to increase the rigidity of the vehicle body, and is set so that this closed space functions as an inside air intake passage.

Specifically, the closed space formed by the dash panel 18 and the cowl lower 46 is connected to the cowl side 56 to which the left end portions of the dash panel 18 and the cowl lower 46 are respectively fixed.
The left side of the dash panel 18 and the cowl lower 46 are closed off, and the dash panel 18 and the cowl lower 46 are read in close proximity to each other while being disposed further inward in the vehicle width direction than the third opening 18a described above. With the closing partition wall 58, the opening is completely closed off from the outside except for the above-mentioned opening.

As shown in FIGS. 3 and 5, the bottom and rear surfaces of the cowl lower 46 at the left end of the vehicle body, where the third opening 18a is formed, are in communication with the closed space thus formed. First and second inside air intake ports 46a and 46b are formed for taking in the air inside the vehicle compartment 16, that is, inside air.

On the other hand, an air intake port 34a is formed on the lower surface of the center of the communication duct 34 mentioned above. A pro unit 50 in the air conditioner is connected to the lower surface of the communication duct 34 via a connection duct 48 while communicating with the air intake port 34a. That is, the lower unit 50 is disposed in front of the dash panel 18, in other words, within the engine room 14.

Here, a shutter valve 52 for switching the introduction state of outside air/inside air to the proer unit 50 is disposed approximately at the center of the communication duct 34. The shutter valve 52 controls the outside air/inside air switching lever of the outside air/inside air introduced into the lower unit 50 based on the operation of an outside air/inside air switching lever attached to an instrument panel (not shown) inside the vehicle compartment 16.
It is designed to switch and drive internal air. As a result,
A communication duct 34 located in front of this shirt valve 52
The front portion 34A allows the outside air introduction duct section to
The rear portions 34B of the communication ducts 34 located rearward of the shatter valve 52 define internal air introduction duct portions.

That is, when this switching lever is set to the outside air introduction mode, this shutter valve 52 is connected to the inside air introduction duct section 34.
B is shielded, and the outside air introduction duct section 34A is opened.
It is set so that only outside air is introduced through A. Further, when the inside air introduction mode (that is, the air circulation mode in the vehicle interior 16) is set, the outside air introduction duct section 34
A is shielded, the inside air introduction duct section 34B is opened, and the opened inside air introduction duct section 3 is inserted into the proa unit 50.
It is set so that only inside air is introduced through 4B.

Note that when this switching lever is set to an intermediate position between the outside air introduction mode and the inside air introduction mode, the shutter valve 5
2 indicates which duct portion 34A.

34B is not shielded and both duct portions 34A and 34B are open, a mixture of outside air and inside air is introduced into the proer unit 50.

Here, the discharge port (not shown) of this proar unit 50 is connected to a communication port (not shown) formed in the dash panel 18, and the air sent out from the proa unit 50 passes through this communication port. Dash panel 18
The air conditioning unit 5 is arranged at the rear of the vehicle, that is, inside the vehicle compartment 16.
4 and is now set to be harmonized.

As described above, since the air introduction structure of this embodiment is configured, when the bonnet 12 closes the engine room 14, the outside air flows through the slit 30 to the inner panel as shown in FIG. It was introduced in 28, and after this,
The air is introduced into the air box 32 through the first opening 28a, and, as shown in FIG. 3, is introduced into the outside air introduction duct portion 34A of the communication duct 34 through the second opening 32a. Then, as shown by the dashed line in FIG. 3, when the switching lever is set to the outside air introduction mode and the shutter valve 52 is opening this outside air introduction duct portion 34A, the outside air that has been brought in so far is The air is taken into the connecting duct 48 through the air intake port 34a and introduced into the proer unit 50.

On the other hand, the inside air flows through the first and second inside air intake ports 46a, 46.
b into the closed space surrounded by the cowl lower 46 and the dash panel 18, that is, the inside air intake passage;
After this, the inside air intake duct 3 is opened through the third opening 18a.
It can be incorporated into 4B. Then, as shown by the two-dot chain line in FIG.
4B is open, the inside air that has been introduced so far is taken into the connection duct 48 through the air intake port 34a and introduced into the proar unit 50.

Although not shown, when the bonnet 12 is rotated upward and the top surface of the engine compartment 14 is opened, the air box 32 described above is attached to the bottom surface of the bonnet 12, so that the bonnet 12 can be opened. According to the rotation, it is separated from the drain hose 38 and taken out from the engine room 14 to the outside. As a result, the air box 32 is removed from the upper part of the engine room 14, and the air box 32 is removed from the upper part of the engine room 14.
The upper part will be left wide open.

In this way, in this embodiment, by arranging the proar unit 50 in the engine room 14, the wind noise generated in the proar unit 50 is blocked by the dash panel 18, and the wind noise generated in the proar unit 50 is blocked by the dash panel 18.
As a result, the interior of the vehicle compartment 16 becomes quieter. On the other hand, the fact that the pro lower unit 50 is arranged in the engine room 14 means that it is located in the vehicle compartment 1.
This means that it is removed from within 6. As a result, the space within the vehicle interior 16 is expanded by the amount by which the proar unit 50 is removed, and the space within the vehicle interior 16 is expanded.

Further, in this embodiment, as described above, the pro lower unit 50 is disposed within the engine room 14. As a result, an opening for taking in internal air can be freely formed in the cowl lower 46,
For example, in this embodiment, two inside air intake ports 46a and 46b, a first and a second, can be formed,
The opening areas of these openings are large (can be set).

In this way, these inside air intake ports 46a.

The flow noise (wind noise) of the air passing through 46b is suppressed to a low level, and from this point of view as well, the noise inside the vehicle compartment 16 can be reduced.

In addition, in this embodiment, although the air box 32 is located in a thick (overhanging) state at the front in the engine room 14, when the bonnet 12 is opened, as the bonnet 12 is opened, The air box 32 will be taken out upward from the engine room 14, and the upper part of the engine room 14 will be largely opened.
4, the engine room 14 is left wide open and the workability is not hindered (
This will improve work efficiency.

Further, in this embodiment, as shown in FIG. 3, the communication duct 34 protruding from the dash panel 18 into the engine room 14 is located only at the left end in the vehicle width direction, and is located at the other end. The configuration is such that this fresh duct 34 does not exist. As a result, the fourth
As shown in the figure, the space above the engine E mounted in the engine room 14 is largely opened, excluding the left end of the engine room 14. The work can be done easily.

It goes without saying that the present invention is not limited to the configuration of the one embodiment described above, and can be modified in various ways without departing from the gist of the invention.

[Effects of the Invention] As described above in detail, the air introduction structure for an automobile according to the present invention is arranged so that the air introduction structure for an automobile according to the present invention is installed in a state where the cowl upper member is located further forward than the dash panel and which is installed in the bonnet. In an air introduction structure for an automobile including an air box that receives outside air introduced through an opening formed in the dash panel, the air box is attached to the front surface of the dash panel in communication with the opening formed in the dash panel. an air duct extending forward from the hood and having an open front end; an arrangement means for arranging the air box so as to communicate with the opening of the air duct when the bonnet is closed; and a midway point of the air duct. A switching device is provided in the interior of the room to switch between indoor and outdoor air, and a blowing device is provided below the switching device, and the air is guided to an air conditioning device provided on the indoor side through the blowing device. It is characterized by having a similar shape.

Further, in the air introduction structure for an automobile according to the present invention, a closed space forming member is attached to the rear surface of the dash panel in a state communicating with an opening formed in the dash panel, and forms a closed space when opened with the dash panel. The closed space forming member is characterized in that an inside air intake port for introducing inside air is formed in the closed space forming member.

Therefore, according to the present invention, there is provided an air introduction structure for an automobile that reduces noise in the vehicle interior caused by air blowing noise and allows the space inside the vehicle to be expanded by eliminating the pro-aper unit from the vehicle interior. become.

In addition, according to this invention, by setting the opening area for inside air intake to be sufficiently wide, the wind noise generated therein can be weakened, thereby reducing the noise inside the vehicle interior. structure will be provided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the configuration of an embodiment of the air introduction structure for an automobile according to the present invention; Fig. 2 shows the air introduction structure shown in Fig. 1 cut along line A-A. A vertical cross-sectional view; FIG. 3 is a vertical cross-sectional view of the air introduction structure shown in FIG. 1 cut along line B-B; FIG. 4 is a vertical cross-sectional view of the air introduction structure shown in FIG.
5 is a longitudinal sectional view showing the air introduction structure shown in FIG. 3 taken along line D-D; FIG. 6 is a longitudinal sectional view taken along line C; 1 is a diagram schematically showing a conventional automobile body structure equipped with an air introduction structure. ...Air intake port, 34A...Outside air introduction duct part, 3
4B... Inside air introduction duct part, 36... Baffle plate, 38... Drain hose, 40... Cowl upper, 42.44... Seal rubber, 46... Cowl lower, 46a; 46b... Inner air intake, 48...
Connection duct, 50...Proa unit, 52...Shutter valve, 54...Air conditioning unit, 56...Cowl side, 58...Partition wall. In the figure, 10...Vehicle body, IOA...Air introduction structure, 1
0B... Internal air circulation structure, 12... Bonnet, 14
...Engine room, 16...Vehicle compartment, 18...Dash panel, 18a...Third opening, 20...Front windshield, 22...Garnish, 24
...Wheel apron, 26...Hinge mechanism, 28
... Inner panel, 28a... First opening, 30.
...Slit, 32...Air box, 32a...
Drain hole, 32b...Second opening, 34...Communication duct, 34a Fig. 1 Fig. 2

Claims (2)

[Claims] (1) An air conditioner for an automobile equipped with an air box that receives outside air introduced through an opening formed in the bonnet, which is located further forward than the cowl top member that is attached to the front of the dash panel. In the introduction structure, an air duct is attached to the front surface of the dash panel in communication with an opening formed in the dash panel, extends forward from the dash panel, and has an open front end; , an arrangement means for arranging the air box so as to communicate with the opening of the air duct; a switching means provided in the middle of the air duct for switching between inside and outside air; and a switching means arranged below the switching means. What is claimed is: 1. An air introduction structure for an automobile, comprising: a blower means, and air is guided to an air conditioning means provided on the interior side of the vehicle through the blower means. (2) Further comprising a closed space forming member that is attached to the rear surface of the dash panel in a state that communicates with the opening formed therein and forms a closed space with the dash panel, the closed space forming member comprising: Claim 1, characterized in that an inside air intake port for introducing inside air is formed.
The air introduction structure of the automobile described in section.