JP6507366B2 - Vehicle ventilation structure - Google Patents

Description

The present invention relates to a vehicle ventilation structure for ventilating a vehicle by discharging air in the vehicle to the outside air from a ventilation duct provided at a rear portion of the vehicle to simultaneously achieve a decrease in internal pressure in the vehicle and improvement of NV performance. .

In the conventional vehicle ventilation structure, communication with the outside air is made through the opening of the body by the openings formed in the fender panel and the interior trim installed along the side part of the cargo compartment provided at the rear of the vehicle. It is performed (refer patent document 1).

In the vehicle ventilation structure 50 as disclosed in the above-mentioned Patent Document 1, as shown in FIG. 11, the belt retractor opening 51 and the ventilation cover 52 of the deck side trim are close, so from the belt retractor opening 51 or the wheel house 53 The noise outside the vehicle tends to enter the vehicle through the slits of the ventilation cover 52, and the NV performance tends to deteriorate.

In the case of a deck side trim made of non-woven fabric by press molding, the rigidity of the main body is insufficient when the hole is made directly by the formation of the slit-like ventilation cover 52, and the appearance becomes worse. Although it will be necessary to set a separate cover of the type, the appearance and construction will be worse due to the different materials.

Also, in the first place, ventilation in the car releases the air inside the car by reducing the internal pressure in the car, and conventionally, the air in the car is allowed to pass on the rear floor and below the rear (rear) of the vehicle body It has been common practice to guide the air into the ventilating duct, referred to as the provided vent duct, for external release.

However, when guiding the air to the rear ventilation duct by passing it on the rear floor, it is excellent in reducing the internal pressure and discharging the air to the outside, but the sound of the outside air directly intrudes into the car. There is a problem that the NV performance is significantly reduced. In addition, although it is conceivable to separately provide a damping member to avoid this, it has not always been preferable from the viewpoint of cost and design.

JP 2012-144155 A

In view of the above problems, the present invention has been created, and it is possible to simultaneously reduce the internal air pressure in the vehicle and improve the NV performance from outside air through the ventilation duct provided at the vehicle rear portion. It aims at providing the ventilation structure of the vehicle which ventilates a car by releasing it.

The present invention, which is provided to solve the problems described above, relates to a vehicle ventilation structure for ventilating a vehicle by discharging air in the vehicle to the outside air from a ventilation duct provided at a rear portion of the vehicle.
At least a part of the flow path of the air in the vehicle reaching the ventilation duct is formed by the gap between the bottom of the deck box of the vehicle and the underbody, and the air is ventilated from the gap through the vent duct opening. It communicates.

According to the ventilation structure of the present vehicle, the gap between the back surface of the internal member of the vehicle and the body panel is used as the air flow path to the ventilation duct (the vent duct opening 31 in the present embodiment). . The applicant only needs to secure the area of the flow path of the air flowing in the vehicle from the viewpoint of lowering the internal pressure, but rather, from the viewpoint of sound insulation prevention, passing through the complicated flow path has a large sound attenuation effect. I learned that to say. The ventilation flow path, which is the gap between the back of the vehicle's inner member and the body panel, which originally exists, forms a complex labyrinth-like flow path, and if this is used, a new structure is newly provided. It is not necessary to reduce the internal pressure and improve the NV performance simultaneously. Also, the place where the passenger can not usually see is the flow path for ventilation, which is also excellent in design. Furthermore, the back surface of the inner member is originally treated to prevent abnormal noise (pasting of felt material, etc.) in many cases, which is also advantageous in that it can be used.

Preferably, at least two vent duct openings are provided, and the total area of the flow path formed by the gap and the opening area of the vent duct openings are substantially the same .

As described above, in order to reduce the internal pressure in the vehicle, the applicant requires that the total of the flow passage area (path area) in the vehicle be smaller than or equal to the total of the opening area of the ventilation duct. When the opening area of the duct is made too large, it pays attention to the contradictory condition that the external sound is difficult to attenuate and the sound insulation effect is lowered and the NV performance is lowered. Therefore, in the ventilation structure of the present vehicle, in order to simultaneously achieve lowering the internal pressure and not reducing the sound insulation effect, the flow passage area in the vehicle and the total opening area of the ventilation duct are made approximately the same.

Furthermore, a part of the ventilation flow path is a ventilation structure of the vehicle for ventilating the vehicle by communicating with the outside air from the ventilation duct through the body opening from the opening of the interior trim provided in the rear portion of the vehicle. The opening of the interior trim may be disposed forward and downward of the vehicle relative to the body opening, and the opening front of the interior trim may be covered with another component with a gap.

In the ventilating structure of the vehicle according to the present invention, the opening front of the interior trim is covered with other parts with a gap therebetween, so it is difficult for the passenger to directly view the opening of the interior trim and the appearance is good.

Also, since the interior trim opening is disposed forward and downward of the vehicle relative to the body opening, a sufficient distance between the interior trim opening and the body opening can be obtained, so noise from the outside of the vehicle can be transmitted to the interior of the vehicle. It is hard to invade.

Furthermore, in the present invention, since the opening as a ventilation port can be formed also in the interior trim which press-formed the nonwoven fabric, the quality in the room can be improved. In addition, since the opening of the interior trim is disposed at a position where it can receive the air flow from the front of the vehicle, air venting when the door is opened or closed can be efficiently performed through the opening of the interior trim.

The present invention utilizes the gap between the back surface of the internal member of the vehicle and the body panel as the air flow path to the ventilation duct, so that it is not necessary to newly provide a separate structure, and the internal pressure is reduced and the NV performance is improved. And at the same time, it is also excellent in design. In addition, in the ventilation structure of the present vehicle, the internal pressure is reduced and the noise insulation effect is not simultaneously reduced by making the total of the flow passage area in the vehicle equal to the total of the opening area of the ventilation duct. Can.

Further, according to the ventilation structure of the present vehicle, the opening front of the interior trim is covered with other parts with a gap therebetween, so that it is difficult for the occupant to directly view the opening of the interior trim, and the appearance is good in appearance. In addition, since the interior trim opening is disposed forward and downward of the vehicle relative to the body opening, a sufficient distance between the interior trim and the body opening can be obtained, and noise from the outside of the vehicle intrudes into the vehicle interior It is possible to exert the effect of being difficult to do.

It is a perspective view which shows the structure and air flow path around a vehicle rear deck in an example of the ventilation structure of the vehicle of this invention. It is a perspective view which shows a mode that the back sheet | seat 14 around a deck box and a sheet | seat is attached to an underbody. It is a perspective view which shows the attachment state of the deck board attached to a deck box and a deck box, and a floor panel. (A) shows a perspective view of a deck trim attached to the rear wall of the vehicle, and (b) shows a schematic cross-sectional view along line C-C of (a). The total area of the area of the vent duct opening that is the outlet of the air flow, the total area of the flow path formed by the gap between the interior parts and the deck box as the divided air flow path, and the total area of the flow area of the middle part It is a schematic diagram explaining the relationship between and. The total area of the area of the vent duct opening that is the outlet of the air flow, the total area of the flow path formed by the gap between the interior parts and the deck box as the divided air flow path, and the total area of the flow area of the middle part It is a schematic diagram explaining the relationship between and. It is the perspective view which showed the rear structure of the vehicle which applied the ventilation structure of the vehicle concerning other this invention. It is the perspective view which looked at the ventilation structure of vehicles concerning other this invention from the vehicles front side. It is the perspective view which looked at the ventilation structure of vehicles concerning other this invention from the vehicles back side. It is the perspective view which looked at the ventilation structure of vehicles concerning other this invention from the vehicles back side. It is a perspective view for demonstrating the ventilation structure of the conventional vehicle.

The invention is schematically illustrated by the illustrated embodiments and one embodiment of the ventilation structure of a vehicle according to the invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing a structure and an air flow passage around a vehicle rear deck in an example of a vehicle ventilation structure according to the present invention. 1, the rear portion 12a of the underbody 12, the deck side trim 32, and the rear wall portion (rear edge) 4 are shown with the rear door, the seat, the floor, and the deck box removed. FIG. 2 is a perspective view showing how the deck box 16 and the rear seat 14 around the seat are attached to the underbody 12.

Further, FIG. 3 is a perspective view showing the deck box 16 and the deck board 18 attached to the deck box 16 and the floor panel 1 attached. FIG. 4 is a deck attached to the vehicle rear wall 4 in (a). A perspective view of the trim 22 is shown and a schematic cross-sectional view along line C-C of (a) is shown in (b). The deck box 16 shown in FIGS. 3 and 4 is exemplified for two-wheel drive.

An underbody 12 is disposed at a position of a rear seat of the vehicle. The rear seat 14 can be turned forward, and the rear surface of the rear seat 14 is attached with the floor panel 14a so as to form a floor surface in the folded state as shown in FIG. Further, a recess 12a is provided in the underbody 12 at the vehicle bed position on the rear side of the vehicle, and the deck box 16 is attached to the recess 12a. A gap is provided in the gap between the bottom portion (or the side portion) of the deck box 16 and the underbody 12a.

Further, as shown in FIG. 3, the deck board 18 is mounted on the top surface of the deck box 16, and the floor panel 1 is mounted on the top surface of the deck board 18 to form the floor of the rear bed.

Referring again to FIG. 1, the air flow W of at least a portion of the air flow passing through the rear seat 14 intrudes into the gap between the bottom of the deck box 16 and the underbody 12. The bottom of the deck box 16 and the underbody 12 are formed in such a way that they combine to form an air flow path. Specifically, the air flow W which has entered the bottom of the deck box 16 is branched to the left and right to form air flows W1, W2, W3, and W4.

The air flow W1 travels in the substantially same direction as the air flow W intruding direction, reaches the vent duct opening 31 (reference numerals 31b and 31c) provided in the vehicle rear wall 4, and is discharged to the outside air . The vent duct opening 31 is an opening serving as an outlet for discharging the air in the vehicle to the outside, and in this case, the vent duct opening 31 is symmetrically provided below the rear wall 4 of the vehicle body.

Further, the air flow W2 rises from the recess 12a of the underbody 12 along the side thereof, is guided to the vent duct opening 31a, is discharged to the outside, and reaches the vent duct opening 31a. The air flow W4 likewise passes from the recess 12a of the underbody 12 through the flow path rising along its side, and penetrates into the deck site trim 32 and is not shown in FIG. The side trim 32 is discharged from the vent duct opening 31a as a flow path. At this time, the air flow in the deck site trim 32 becomes easy to flow due to the presence of the belt retractor hole 30. The role of the belt retractor hole 30 will be described later.

Also, the air flow W3 is branched at the front of the deck box 16 before the air flow W reaches the bottom of the deck box 16, and enters the deck site trim 32 like the air flow W4, and the vent duct It is discharged from the opening 31a to the outside. Although FIG. 1 illustrates the divided flow of the air flow W as the air flows W1, W2, W3, and W4, the back surface and the body panel of the interior parts in the car (exemplified by the deck box 16 in FIGS. 1 to 3) In FIG. 2, it may be another flow path of the clearance with the underbody 12), and it enters inside through the ventilation opening 33 of the deck side trim 32 described later, reaches the vent duct opening 31a, and is outside It is also included when released.

Furthermore, although the deck trim 22 shown in FIG. 4 (a) is attached to the back wall 4, there is a gap between the deck trim 22 and the back wall 4 as shown in FIG. 4 (b), The air flow W1 passing through the flow path of the gap between the back surface of the deck box 16 and the underbody 12 enters the gap from below and is discharged from the vent duct opening 31c (or 31b) to the outside.

Here, the relationship between the total amount of the opening area of the vent duct opening 31 and the total amount of the flow path area formed by the gap between the back surface of the interior part in the vehicle and the body panel will be described with reference to FIGS. The airflow W is substantially equal to the total area (total) of the flow path formed by the gap between the interior part such as the underbody 12 and the deck box 16 and the like and the total area (total) of the opening area of the vent duct opening 31 It is designed as an area.

5 and 6, the opening area of the vent duct opening 31 which is the outlet of the air flow W (= W1 + W2 + W3 +...) Is Xo (hereinafter also referred to as “total outlet area Xo”), divided air flow The total amount of flow path area formed by the gap between the interior part such as the underbody etc. and the deck box 16 etc. as the path of W1, W2, W3, ... Xi (hereinafter, also referred to as "total path area Xi"), A schematic diagram is shown for explaining the relationship when the total amount of the flow passage area in the middle portion to reach the vent duct opening 31 is Xm (hereinafter, also referred to as “middle total area Xm”). .

As shown in FIG. 5 (a), in the case of the route total area Xi = outlet total area Xo, the air flow in the vehicle is left as it is, so the balance between the effect of reducing the internal pressure and the attenuation effect of outside air noise is good. Conceivable. As shown in FIG. 5B, when the route total area Xi = intermediate total area Xm <outlet total area Xo, the effect of reducing the internal pressure is large but the intrusion of external air noise is large and it can not be said that this is a good example. As shown in FIG. 5C, in the case of total path area Xi> outlet total area Xo, the amount of air released at the outlet is limited compared to the amount of air at the inlet, and the effect of reducing the internal pressure is low. I can not say.

Further, FIG. 6 shows an example in which the total area of the intermediate path and the outlet opening in the middle changes with respect to the total inlet area. As shown in FIG. 6A, when middle total area Xm <path total area Xi <outlet total area Xo, the effect of reducing the internal pressure is large but the intrusion of external air noise is large and it can not be said that this is a good example. Further, as shown in FIG. 6B, in the case of the total area of intermediate Xm <the total area of outlet Xo <the total area of path Xi, the internal pressure is reduced because the amount of air discharged at the outlet is limited compared to the air amount at the inlet. The effect is low and it is not a good example. Furthermore, as shown in FIG. 6C, in the case of the total area of intermediate Xm <the total area of path Xi = the total area of outlet Xo, the total area of the inlet and the outlet is the same. The balance is good and considered as a good example.

From the above, it can be seen that the path total area Xi and the exit total area Xo are substantially the same in that the balance between the effect of reducing the internal pressure and the attenuation effect of the outside air sound is good. In addition, this is not affected by the intermediate total area Xm, and the internal pressure is reduced by combining the total area of the inlet and the outlet even when the bottom of the deck box 16 having a complicated shape as shown in FIG. And the sound insulation effect can be maintained, and from the viewpoint of the sound insulation effect, it is preferable to use a complicated labyrinth shape as the path because the sound attenuation effect is high.

The total route area Xi is the total area of the flow path formed by the gap between the back surface of the interior part in the vehicle and the body panel, and is considered to be other than the deck box 16 as the interior part. It also includes the flow path between the body and the body panel. Below, it illustrates.

FIG. 7 is a perspective view showing the structure in the vicinity of the deck side trim 32 at the rear of the vehicle. FIG. 8 is a perspective view of the deck side trim 32 of FIG. 7 as viewed from the front side of the vehicle. FIGS. 9 and 10 are perspective views of the deck side trim 32 of FIGS. 7 and 8 as viewed from the rear side of the vehicle. This vehicle is a hatchback vehicle type provided with a back door, and FIGS. 8 to 10 show a state in which the back door is removed. In the description of FIGS. 7 to 10, for convenience of explanation, an XYZ three-dimensional coordinate system is defined, and the structure will be described with reference to this coordinate system. Therefore, in FIGS. 7 to 10, the longitudinal direction of the vehicle is defined as the X direction, the vehicle width direction as the Y direction, and the vertical direction of the vehicle as the Z direction.

As shown in FIG. 7, the vehicle comprises a floor panel 1 forming the bottom of the vehicle body, a luggage compartment 2 provided at the rear of the vehicle body, a vehicle body side wall 3 installed on the side thereof, and a vehicle body And a vehicle rear wall 4 provided at the rear end of the vehicle. The floor panel 1 is configured to be able to install a rear seat (not shown). A rear pillar (not shown) is provided on the vehicle rear wall 4.

The vehicle body side wall portion 3 has an inner panel (not shown) and an outer panel (not shown) provided on the inner side in the vehicle width direction (Y direction), and the deck side trim 32 (interior trim) on the cargo room side of the inner panel. Is arranged. Reference numeral 30 in FIG. 7 indicates a belt retractor hole (body opening) provided on the inner panel, and reference numeral 31 indicates a vent duct opening provided on the outer panel (a plurality of openings are provided in FIG. 1). .

At a portion of the deck side trim 32 on the side of the occupant's seat, a venting opening 33 (opening of the interior trim) forward of the vehicle is formed at a position where it can receive air flow from the front of the vehicle due to internal pressure (FIG. 7). See (a)). As shown in FIG. 7A, the ventilation opening 33 is disposed in front of and below the belt retractor hole 30 in the vehicle. Further, the ventilation opening 33 is disposed at a position where the front surface 33a can be covered by a rear seat (not shown) with a gap.

Arrows in FIG. 7A indicate the flow of air that has flowed into the ventilation opening 33. As shown by the arrows, air from the front of the vehicle flows into the ventilation opening 33, passes through the belt retractor hole 30 and the vent duct opening 31 sequentially, and is exhausted to the outside of the vehicle. Thus, ventilation of the interior of the vehicle is realized by the internal pressure of the air being drawn in the longitudinal direction of the vehicle.

As shown in FIG. 7 (b), the ventilation opening 33 of the deck side trim 32 has a shelf shape in which a roof 34 is provided in the vehicle upper direction (Z direction). Further, as shown in FIG. 7 (b), a flange 35 is provided around the ventilation opening 33. The flange 35 is formed to be connected to a flange 36 formed on the lower end edge of the deck side trim 32.

In the above configuration, since the front face 33a of the ventilation opening 33 is covered by the rear seat (not shown) with a gap, only the roof 34 forming the shelf can be seen even when viewed from the gap with the rear seat cushion. The ventilation opening 33 is unlikely to be viewed directly from the occupant, and the appearance on the appearance is good.

In addition, since the ventilation openings 33 of the deck side trim 32 are disposed forward and downward of the vehicle with respect to the belt retractor holes 30, a sufficient distance between the ventilation openings 33 and the belt retractor holes 30 can be increased. Since the distance from the belt retractor hole 30 to the ventilation opening 33 is large, the noise from the outside of the vehicle is attenuated, and the position below the rear seat cushion makes it difficult for the noise to reach the occupants' ears and the noise from outside the vehicle Is difficult to intrude into the vehicle and is advantageous for improving the NV performance.

Moreover, since the ventilation opening 33 as a ventilation port can be formed also in the deck side trim 32 which press-formed the nonwoven fabric, the indoor quality can be improved.

In addition, since the ventilation opening 33 of the deck side trim 32 is disposed at a position where air flow from the front of the vehicle can be received, internal pressure reduction (air removal) at the time of opening and closing of the door etc. is efficiently performed through the ventilation opening 33. Can. Further, as described above, the ventilation flow path having the same total flow area as the total opening area of the vent duct opening 31 can also include the flow path from the ventilation opening 33.

In addition, by connecting the flange 35 provided around the ventilation opening 33 to the flange 36 formed on the lower end edge of the deck side trim 32, the rigidity of the ventilation opening 33 is secured, and the inside view from the rear seat is prevented. it can.

As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not limited to these embodiment. The scope of the present invention is indicated not by the description of the embodiments described above but by the claims, and further includes all modifications within the meaning and scope equivalent to the claims.

The ventilation structure of a vehicle according to the present invention can be suitably used in a vehicle that ventilates a vehicle.

1 floor panel 2 luggage compartment 3 vehicle body side wall (rear edge)
12 underbody 14 rear seat 16 deck box 18 deck board 30 hole for belt retractor (body opening)
31 vent duct opening 32 deck side trim (interior trim)
33 vent opening (interior trim opening)
33a front (the opening front of the interior trim)
34 roof
35, 36 flanges

Claims (2)

A ventilating structure of a vehicle for ventilating the interior of the vehicle by discharging the air inside the vehicle to the outside air from a ventilation duct provided at a rear portion of the vehicle
At least a part of the flow path of the air in the vehicle reaching the ventilation duct is formed by the gap between the bottom of the deck box of the vehicle and the underbody, and the air is ventilated from the gap through the vent duct opening. Communicate,
Vehicle ventilation structure characterized by.
The at least two vent duct openings are provided, and the total area of the flow path formed by the gap and the opening area of the vent duct openings are substantially the same . Vehicle ventilation structure.