JP5979380B2 - Intake sound transmission device for vehicle - Google Patents

Description

  The present invention relates to an intake sound transmission device for a vehicle, and more particularly to an intake sound transmission device for a vehicle including a sound guide duct for transmitting intake sound into a vehicle interior and a chamber portion for adjusting the sound quality of the intake sound.

2. Description of the Related Art Conventionally, there has been known an intake sound transmission device that transmits engine intake sound (also referred to as engine sound) generated in accordance with a traveling state of a vehicle or a change in the traveling state into a vehicle interior.
The intake sound transmission device of Patent Document 1 includes a sound guide duct that communicates an intake duct that introduces intake air to an engine and a vehicle interior, a speaker device that is disposed in the middle of the sound guide duct, and the speaker device. And a control device that performs drive control according to the engine speed, and a partition made of a breathable porous member is provided at a sound guide duct connecting portion that is a connection portion between the intake duct and the sound guide duct.

There is also known an intake sound transmission device that amplifies engine intake sound and transmits it to the vehicle interior.
The intake sound transmission device of Patent Document 2 includes a sound guide duct that communicates an intake duct for introducing intake air to the engine and a vehicle interior via a cowl box or a dash panel, and a resonance provided in the middle of the sound guide duct. And a membrane vibrating portion as a mechanism, and the inside of the membrane vibrating portion is configured to be partitioned by a vibrating membrane that amplifies intake sound by membrane vibration due to intake pulsation.

It is known that the front midship system in which the center of gravity of the engine is positioned behind the front wheel axle is an effective engine mounting method for improving steering stability and driving performance.
In this front midship type vehicle, a vertical engine in which a crankshaft disposed at the front of the vehicle body extends in the longitudinal direction of the vehicle body, a transmission connected to the rear end of the engine, and a propeller shaft extending rearward from the transmission. In addition, many FR vehicles are employed in which the crankshaft and the transmission shaft are aligned with the center of the vehicle.

JP 2006-276778 A JP 2008-267219 A

In the intake sound transmission devices of Patent Documents 1 and 2, after generating an intake pulsation of a desired frequency band corresponding to the running state, for example, a low frequency, the intake sound is opened in the vehicle compartment wall (dash panel). It can be transmitted to the vehicle interior via the discharge port at the end of the sound guide duct.
However, in the intake sound transmission devices of Patent Documents 1 and 2, since the effective arrangement position of the discharge port at the end of the sound guide duct is not taken into consideration, the generated intake sound is transmitted to the passengers in the passenger compartment, particularly the driver. May not be able to be communicated sufficiently.

That is, when the discharge port at the end of the sound guide duct is disposed in the driver seat side portion of the dashboard panel, since the brake seat such as a brake booster is equipped on the driver seat side of the dash panel, the sound guide duct and the chamber portion are provided. However, it is difficult to secure an arrangement space for the sound guide duct, and there is a possibility that an effective path length of the sound guide duct cannot be secured.
In addition, when the discharge port at the end of the sound guide duct is installed at the center of the dash panel in the vehicle width direction, the air intake unit is installed at the center of the dashboard panel in the vehicle width direction. May interfere with the air conditioning blower and the air conditioning main body, and the intake sound may be attenuated during transmission. In the front midship type vehicle, the space between the power train and the central portion of the dashboard panel in the vehicle width direction is extremely narrow, and an effective sound guide duct is formed between the power train and the central portion of the dash panel in the vehicle width direction. It is difficult to secure the path length.

In addition, even when a discharge port at the end of the sound guide duct is provided on the opposite side of the driver seat of the dash panel, an air conditioning unit or the like is installed on the rear side of the dash panel to improve the appearance. An instrument panel that is spaced apart from the vehicle is installed, and the linear shortest transmission path between the discharge port of the sound guide duct and the occupant is blocked by the instrument panel.
Thus, although it is conceivable to arrange the discharge port at the end of the sound guide duct so as to be exposed in the vehicle interior, the appearance in the vehicle interior is deteriorated, and it is not a realistic arrangement structure from the viewpoint of merchantability.

  An object of the present invention is to provide an intake sound transmission device for a vehicle that can achieve both improved intake sound transmission performance and improved appearance.

The vehicle intake sound transmission device according to claim 1 forms a dash panel that partitions the engine room and the vehicle compartment, a cowl panel that is joined to an upper end portion of the dash panel and projects rearward, and a side wall of the vehicle compartment. In a vehicle intake sound transmission device including a side panel, a sound guide duct for transmitting intake sound from an intake duct for introducing intake air to an engine to a vehicle interior, and a sound quality of the intake sound provided in the middle of the sound guide duct and a chamber portion for adjusting the sound guide duct of the vehicle width direction outer side and than Rutotomoni the chamber portion is provided in a position close to outlet to said dash panel and the cowl panel and side panel end It is characterized by being disposed above the harness insertion opening formed in the dash panel .

  The intake sound transmission device for a vehicle according to claim 1, wherein a sound guide duct for transmitting intake sound from an intake duct for introducing intake air into an engine to a vehicle interior, and a sound quality of the intake sound provided in a middle portion of the sound guide duct are adjusted. Therefore, a large-sized mechanism such as a speaker device can be omitted, and the intake sound transmission device can be made compact.

According to a second aspect of the present invention, in the first aspect of the invention, the vehicle is connected to an instrument panel that covers an air conditioner disposed at a rear center portion of the dash panel in the vehicle width direction, and a lower end of the dash panel. And a tunnel portion extending in the front-rear direction formed in a bulging shape upward in the vehicle width direction center portion of the floor panel, and at least a part of the powertrain is accommodated below the connecting portion between the tunnel portion and the dash panel. It is characterized by that.

According to the first aspect of the present invention, since the discharge port at the end of the sound guide duct is provided at a position close to the dash panel, the cowl panel, and the side panel, the discharge port of the sound guide duct is provided in the vehicle interior by the instrument panel. The appearance in the passenger compartment can be improved without exposing it. In addition, since the intake sound is reflected to the cowl panel and the side panel and transmitted to the occupant in the vehicle interior, the intake sound can be transmitted to the occupant through a transmission path that bypasses the electrical equipment such as the air conditioning unit and the instrument panel.
In addition, the discharge port at the end of the sound guide duct is disposed on the outside in the vehicle width direction so that the intake sound released from the discharge port can be reliably reflected by the side panel. Arranged above the harness insertion opening of the dash panel, the intake sound emitted from the discharge port can be reliably reflected by the lower surface of the cowl panel, so the diffused intake sound is collected and transmitted to the occupant be able to.

According to the invention of claim 2 , it is possible to obtain a front midship type vehicle that achieves both improvement of intake sound transmission performance and improvement of steering stability such as improvement of vehicle body rigidity by a tunnel and rearward of the center of gravity by rearward placement of a power train. .

1 is a schematic plan view of a front portion of a vehicle in which a bonnet according to Embodiment 1 of the present invention is omitted. It is the II-II sectional view taken on the line of Drawing 1 when an engine is omitted. It is the figure which looked at the vehicle diagonally forward from the vehicle interior. It is a schematic plan view of a bonnet, an intake sound transmission device, and PCM. It is the VV sectional view taken on the line of FIG. It is an assembly drawing of an intake sound transmission device. It is a figure which shows the transmission path | route of an intake sound. 6 is a longitudinal sectional view of a main part according to Embodiment 2. FIG.

  Hereinafter, modes for carrying out the present invention will be described based on examples. In this embodiment, the direction of arrow F is assumed to be the forward direction, and the direction of arrow L is assumed to be the left direction.

Embodiment 1 of the present invention will be described below with reference to FIGS.
In the present embodiment, a front-mounted engine 30, a front transmission including an automatic transmission (not shown) connected to the rear end of the engine 30, a propeller shaft (not shown) connected to the automatic transmission, and the like. The intake sound transmission device 40 of the midship FR vehicle V will be described as an example.

First, the main vehicle body structure will be described.
As shown in FIG. 1, the vehicle V includes a dash panel 3 installed so as to partition the engine room 1 and the vehicle compartment 2, and a pair of left and right front side frames 4 extending forward from the dash panel 3; A floor panel 5 that forms a bottom surface of the passenger compartment continuously from the lower end of the dash panel 3, and a tunnel portion 6 that extends in the front-rear direction by bulging the center in the vehicle width direction of the floor panel 5. ing.

  As shown in FIGS. 1 to 3, a bulging portion 3 a that bulges rearward is formed at the center in the vehicle width direction of the dash panel 3. The rear part of the engine 30 and a part of the automatic transmission are accommodated in the bulging part 3a, and the rear part of the automatic transmission, the propeller shaft (not shown), and the power plant frame (not shown) are accommodated in the tunnel part 6. Has been. Thereby, since the power train (engine 30 and automatic transmission), which is a heavy object, is arranged behind the vehicle body using the inside of the tunnel part 6, the center of gravity of the vehicle can be brought close to the center part in the front-rear direction of the vehicle body, It is possible to effectively reduce the yaw moment of inertia that acts during traveling, thereby improving steering stability and traveling stability.

As shown in FIGS. 1, 3, and 7, the dash panel 3 is connected with a bowl-shaped cowl member 8 that protrudes backward toward the outer side in the vehicle width direction so as to correspond to the rear end of the bonnet 7 at the upper end. A brake member 23 is mounted on the side wall surface of the engine room corresponding to the right driver's seat 10.
In the upper left part of the dash panel 3, a harness insertion opening 3b and an opening 3c formed above the harness insertion opening 3b are formed so as to communicate the engine room 1 and the vehicle compartment 2. . An instrument panel 11 formed so as to bulge rearward from the rear end of the cowl member 8 is disposed behind the dash panel 3 so as to extend in the vehicle width direction with the lower part opened. The instrument panel 11 is provided so as to cover and cover the harness insertion opening 3b and the opening 3c from the rear side of the vehicle, and the air conditioning pro 12a and the conditioned air that can be blown into the vehicle compartment 2 with the dash panel 3 And an air conditioning main body 12b for adjusting the temperature of the air conditioning.
The side panel 9 constituting the side wall of the passenger compartment 2 is covered with a trim member (not shown) on the passenger compartment 2 side surface.

As shown in FIGS. 2, 4, and 5, the bonnet 7 has a closed cross section in which the bonnet outer panel 7 a and the bonnet inner panel 7 b cooperate.
The bonnet inner panel 7b includes an annular groove 7c recessed upward in a trapezoidal cross section along the outer peripheral edge of the bonnet 7, and extends in the vehicle width direction at the middle portion in the front-rear direction of the bonnet 7 and recessed upward in a wedge shape. A recessed portion 7d is formed.
The annular groove portion 7c increases the rigidity of the bonnet 7 while reducing the thickness of the bonnet outer panel 7a and the bonnet inner panel 7b. When the concave portion 7d collides with an obstacle on the front surface, the bonnet 7 is substantially started from the concave portion 7d. The deformation of the bonnet 7 is promoted while being bent and controlled in the shape of a letter. The deformation promoting recess 7d prevents the bonnet from retreating without excessively reinforcing the bonnet hinge.

As shown in FIG. 1, the pair of left and right front side frames 4 are formed in a substantially straight line forward at a position separated from the pair of left and right apron reinforcements 13 formed on the inner side of the side wall inward in the vehicle width direction. Each is arranged to extend. The front side frames 4 are connected to each other at their front end portions via a front cross member 14.
A pair of left and right strut towers 15 are formed between an intermediate portion of the pair of left and right front side frames 4 and a pair of left and right apron reinforcements 13, respectively. A pair of left and right tower brackets 16 for supporting the damper device (not shown) on the strut tower 15 are fixed to the tops of the pair of left and right strut towers 15, respectively. The rear portion of the left tower bracket 16 is provided with a fixing portion 16a projecting rearward.

  As shown in FIGS. 1, 2, 4 to 6, a power control module (hereinafter referred to as “PCM”) 17 is provided near the tower bracket 16 at the upper portion of the left front side frame 4. 19 and a fuse box 18 is disposed in front of the PCM 17.

The PCM 17 is configured to be able to control an engine ignition mechanism, a fuel injection device, an intake / exhaust system, a valve mechanism, start control, and the like based on a plurality of sensor outputs. The PCM 17 is formed in a cubic shape, and includes detachable first and second connectors 17a and 17b at the upper end.
The first connector 17a is connected to the front end thereof with a first harness 20a for electrical connection to the fuse box 18. The first connector 17a has an inclined portion 17s that moves downward toward the rear upper end at the rear upper end, and a lock lever 17m that is installed at the front so that the upper end, which is the free end, moves downward toward the rear. Etc.
By operating the lock lever 17m, the locked state of the first connector 17a can be released, and the first connector 17a can be attached and detached.

The second connector 17b is connected to the rear end thereof with a second harness 20b for electrical connection to the engine 30. The second connector 17b is installed in a substantially horizontal shape at the lower portion of the inclined portion 17t, the inclined portion 17t moving upward toward the rear upper end portion, and the front end portion, which is a free end thereof, upwardly toward the rear side. A lock lever 17n or the like that swings is provided.
By operating the lock lever 17n, the locked state of the second connector 17b can be released, and the second connector 17b can be attached and detached.
The inclined portion 17s and the inclined portion 17t are arranged so as to face each other in the front-rear direction, and form a trough portion 21 that is recessed downward while facing the recessed portion 7d.

As shown in FIGS. 2 and 6, the PCM bracket 19 has a lower end of the vehicle width direction inner portion fastened to a vehicle width direction inner vertical wall portion of the front side frame 4, and an upper portion of the vehicle width direction inner portion is a tower bracket 16. Further, the fixing portion 19a is formed extending upward. The upper end of the vehicle width direction outer portion of the PCM bracket 19 extends upward and is fastened to the tower bracket 16.
The fuse box 18 is connected to the first and third harnesses 20a and 20c.
The first harness 20a is connected to the first connector 17a, and the third harness 20c is inserted into the harness insertion opening 3b and connected to various control devices and electrical components in the passenger compartment 2.

  The floor panel 5 is provided with a pair of left and right floor frames (not shown) extending in the front-rear direction on the lower surface, and provided with a pair of left and right side sills (not shown) extending in the front-rear direction at both left and right ends. The tunnel portion 6 has a front end portion joined to a rear end portion of the bulging portion 3a, and a tunnel reinforcement (not shown) extending in a substantially M-shaped front and rear direction at an upper portion thereof.

Next, the engine 30 will be described.
As shown in FIGS. 1 and 2, the engine 30 is composed of an in-line engine in which a crankshaft (not shown) is vertically arranged at the center in the vehicle width direction of the engine room 1 so as to extend in the front-rear direction. The portion is mounted in a state where it is partially accommodated in the bulging portion 3a.
The rear left and right end portions of the engine 30 are connected to tower bars 22 fixed to the pair of left and right tower brackets 16 in order to increase the support rigidity of the engine 30. The pair of tower bars 22 are respectively arranged in an inclined shape so as to move backward toward the inner side in the vehicle width direction.

As shown in FIGS. 1 and 2, the engine 30 includes an intake duct 31 extending from the left front portion of the engine 30 to the right front side, an intake manifold 32 installed on the left wall surface of the engine 30, and a right wall surface of the engine 30. An installed exhaust manifold 33, a throttle body 34 capable of adjusting the intake air amount, a blow-by gas pipe 35, an oil separator chamber (not shown) for separating oil mist from the blow-by gas, and the like are provided.
A connecting portion 36 extending upward is integrally formed in the middle portion of the intake duct 31.

The intake air that has passed through the air cleaner 37 flows through the intake duct 31 and is supplied to the intake manifold 32 after the flow rate is adjusted by the throttle body 34. Exhaust gas discharged from each combustion chamber is collected by the exhaust manifold 33 and discharged to the rear of the vehicle body.
The blow-by gas pipe 35 is connected to the connecting portion 36 via the blow-by gas suction portion 36 a, and returns the blow-by gas that has passed through the oil separator chamber and finished oil separation to the inside of the intake duct 31.

Next, the intake sound transmission device 40 will be described.
As shown in FIGS. 1 to 7, the intake sound transmission device 40 is configured to be able to adjust the sound quality of the intake sound of the engine 30 and transmit it to the interior of the passenger compartment 2.
The intake sound transmission device 40 includes a sound guide duct 41 that transmits intake sound from the intake duct 31 into the vehicle compartment 2, and a chamber portion 42 that is provided in the middle of the sound guide duct 41 and adjusts the sound quality of the intake sound. Etc.

The sound guide duct 41 includes a sound guide sound duct upstream portion 43 upstream of the chamber portion 42, a sound guide duct downstream portion 44 downstream of the chamber portion 42, and the like.
As shown in FIGS. 1 and 4 to 6, the sound guide duct upstream portion 43 is disposed above the front side frame 4 and the blow-by gas suction portion 36 a and is connected to the connection portion 36 of the intake duct 31. The first sound guide duct upstream portion 43a, the second sound guide duct upstream portion 43b connected to the downstream end of the first sound guide duct upstream portion 43a, and the downstream end of the second sound guide duct upstream portion 43b and the chamber And a third sound guide duct upstream portion 43 c connected to the portion 42.

  The first sound guide duct upstream portion 43a is formed of a flexible rubber bellows with a bellows, and is configured to extend in a substantially upwardly inclined manner outward in the vehicle width direction in a state where at least a part of the concave portion 7d is overlapped in a plan view. Has been. The upstream end portion of the first sound guide duct upstream portion 43a is connected to a sound guide duct connection portion 36b whose center is formed at a position higher than the center of the blow-by gas suction portion 36a, and the first sound guide duct upstream portion. The downstream end of 43a is disposed at a position near the inside in the vehicle width direction of the PCM 17 in plan view.

  The second sound guide duct upstream portion 43b is disposed at a position higher than the blow-by gas suction portion 36a. The second sound guide duct upstream portion 43b is made of a synthetic resin pipe having a predetermined rigidity that is higher in rigidity than the first sound guide duct upstream portion 43a and is less deformed by running vibration, and is recessed portion 7d in plan view. And in a state of being overlapped with the valley portion 21 so as to extend substantially linearly outward in the vehicle width direction. The upstream side portion of the second sound guide duct upstream portion 43b is fixed to the fixing portion 19a of the PCM bracket 19 via a rubber mount. Accordingly, since the relative position of the PCM 17 with respect to the first and second connectors 17a and 17b hardly changes even when traveling vibration is received, the second sound guide duct upstream portion 43b and the first and second connectors 17a and 17b are connected. It is arranged close to the vertical direction while preventing interference. The downstream end of the second sound guide duct upstream portion 43b is disposed above the connecting portion between the tower bracket 16 on the left side and the tower bar 22 in plan view.

  The third sound guide duct upstream portion 43c is disposed at a position higher than the blow-by gas suction portion 36a. The third sound guide duct upstream portion 43c is made of a rubber hose having a higher rigidity (having a larger elastic coefficient) than the first sound guide duct upstream portion 43a and having a small deformation due to running vibration. After extending outward in the vehicle width direction, it is configured to bend backward and connect to the chamber portion 42.

As shown in FIG. 2, the chamber portion 42 is formed in a cylindrical shape, is disposed in the vicinity of the rear portion of the left strut tower 15, and is integrated with the chamber portion 42 in a state of being superimposed on the annular groove portion 7 c in plan view. It is supported by a molded mounting bracket part 45. The mounting bracket portion 45 has an outer end portion in the vehicle width direction fastened to the upper portion of the apron rain 13, and an inner end portion in the vehicle width direction fixed to the fixing portion 16a of the tower bracket 16 via a rubber mount. The mounting bracket portion 45 may be a separate bracket from the chamber portion.
The chamber section 42 includes a vibrating body (not shown) that vibrates using the intake pulsation as an excitation source, a cylindrical resonance section 42a that amplifies the sound pressure level of the intake sound in a predetermined frequency band, and the like.
The vibrating body is housed inside the chamber portion 42, and includes a bellows portion (not shown), a thin-film-like vibrating surface portion (not shown) that closes the end portion, and the like.

The sound guide duct downstream portion 44 is made of a synthetic resin pipe having a predetermined rigidity that is higher in rigidity than the first sound guide duct upstream portion 43a and less deformed by its own weight or traveling vibration. The opening 3c formed in the dash panel 3 is communicated.
The upstream end of the sound guide duct 44 is connected to the resonance portion 42a, extends outward in the vehicle width direction along the front surface of the passenger compartment (dash panel 3), and bends downward in a crank shape. A terminal discharge port 44a is connected to the opening 3c.
The intake pulsation (intake sound) amplified by the resonance part 42a is transmitted through the sound guide duct downstream part 44 and released into the vehicle compartment 2 from the discharge port 44a (opening 3c).

The intake sound released from the discharge port 44a is transmitted to the passenger on the driver's seat 10 side through the first to fourth transmission paths R1 to R4.
As shown in FIGS. 1 and 7, in the first transmission path R <b> 1, the intake sound released from the discharge port 44 a is reflected in the instrument panel 11 and directly transmitted to the occupant. In the second transmission path R <b> 2, the intake sound emitted downward from the discharge port 44 a is reflected by the floor panel 5 and transmitted to the occupant. In the third transmission path R3, the intake sound emitted upward from the discharge port 44a is reflected by the lower surface of the cowl member 8, and the reflected sound is reflected by the floor panel 5 and transmitted to the occupant. In the fourth transmission path R4, the intake sound emitted from the discharge port 44a to the rear in the vehicle width direction is reflected by the side panel 9, and the reflected sound is reflected directly or by the floor panel 5 and transmitted to the occupant. (See FIG. 1).
Thereby, the intake sound emitted from the discharge port 44a bypasses the obstacles such as the tunnel part 6, the air conditioning blower 12a, the air conditioning main body part 12b, the instrument panel 11 and the like by the transmission paths R2 to R4 in addition to the transmission path R1. Then, it is transmitted well to the passenger on the driver's seat 10 side.

Next, functions and effects of the intake sound transmission device 40 for the vehicle V according to the first embodiment will be described.
According to the intake sound transmission device 40 of the vehicle V, the discharge port 44a at the end of the sound guide duct 41 is provided at a position close to the dash panel 3, the cowl member 8, and the side panel 9, so that it is guided by the instrument panel 11. The appearance in the passenger compartment 2 can be improved without exposing the discharge port 44a of the sound duct 41 in the passenger compartment 2. Moreover, in order to reflect the intake sound to the cowl member 8 and the side panel 9 and transmit it to the passenger in the passenger compartment 2, in addition to the transmission path R1, the intake sound is sent to the air conditioning blower 12a, the air conditioning main body 12b, and the instrument panel 11. By using the detouring transmission paths R2 to R4, obstacles can be avoided and the vehicle can be effectively transmitted.

The discharge port 44 a of the sound guide duct 41 is disposed outside the chamber portion 42 in the vehicle width direction and above the harness insertion opening 3 b formed in the dash panel 3.
As a result, the discharge port 44a of the sound guide duct 41 is disposed on the outer side in the vehicle width direction, and the intake sound discharged from the discharge port 44a can be reliably reflected by the side panel 9. by disposing the outlet 44a on the upper side of the harness through opening 3b of the dash panel 3, it is possible to reliably reflect intake sound emitted from the discharge port 44a by the lower surface of the cowl member 8, intake sound to spread Can be aggregated and transmitted to the passengers.

  The vehicle V is in the vehicle width direction of the instrument panel 11 covering the electrical blower 12a and the air conditioning main body 12b disposed in the center rear side portion of the dash panel 3 in the vehicle width direction, and the floor panel 5 connected to the lower end of the dash panel 3 A tunnel portion 6 extending in the front-rear direction is formed in the center portion so as to bulge upward, and at least a part of the powertrain is accommodated below the connecting portion between the tunnel portion 6 and the dash panel 3. Accordingly, it is possible to obtain a front midship vehicle V that achieves both improved intake sound transmission performance and improved steering stability.

Next, an intake sound transmission device 40A according to Example 2 will be described with reference to FIG.
Only the configuration different from that of the first embodiment will be described, and the same members as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 8, the dash panel 3 is provided with a bowl-shaped cowl member 8 </ b> A projecting rearward so as to correspond to the rear end of the bonnet 7 at the upper end.
The cowl member 8A has an insertion hole 8a formed in the left side portion of the front wall and an insertion hole 8b formed in the left side portion of the rear wall. The insertion hole 8b is provided close to the dash panel 3 and the side panel 9 in front view.

The intake sound transmission device 40A includes a sound guide duct 41A that transmits the intake sound from the intake duct 31 into the passenger compartment 2, and a chamber portion 42A that is provided in the middle of the sound guide duct 41A and adjusts the sound quality of the intake sound. Etc.
The sound guide duct 41A includes a sound guide duct upstream portion 43A on the upstream side of the chamber portion 42A, a sound guide duct downstream portion 44A on the downstream side of the chamber portion 42A, and the like.
The sound guide duct upstream portion 43A is disposed above the front side frame 4 and the blow-by gas suction portion 36a.

The chamber portion 42A is fixed to the insertion hole 8a, the sound guide duct downstream portion 44A extends inward in the vehicle width direction and then bends downward, and the discharge port 44b is connected to the insertion hole 8b.
Therefore, the intake sound released from the discharge port 44b of the sound guide duct downstream portion 44A is released so as to move toward the inner side in the vehicle width direction toward the rear side with respect to the floor panel 5, and to the passenger of the driver seat 10 Intake sound is transmitted from 30 directions.

Next, a modification in which the above embodiment is partially changed will be described.
1) Although the description of the sound absorbing material provided in each panel member is omitted in the above embodiment, the sound absorbing function in the vicinity of the discharge port of the sound guide duct is reduced from the sound absorbing function in the other peripheral parts, so that the intake sound transmitting performance is reduced. Can be further increased.
Specifically, the sound absorbing material on the vehicle interior side near the discharge port of the sound guide duct is reduced from the surrounding area, and the reflectance of the intake sound is improved while suppressing the deterioration of the sound absorption performance in the entire vehicle interior. In addition, the sound absorbing material is omitted from the side of the vehicle interior in the vicinity of the outlet of the dash panel, cowl panel, and side panel, and the sound absorbing material is installed or enhanced on the outer side of the vehicle interior, or the surface of the sound absorbing material in the vicinity of the outlet is provided. By installing a partially rigid panel or attaching a reflective panel, it is possible to improve the reflective efficiency of the intake sound without degrading the sound absorption performance of the noise entering from the outside of the vehicle compartment of each panel, simply a dash panel or vehicle compartment Compared with the method of reducing the overall sound absorbing material and increasing the transmission and reverberation of the intake sound, the transmission amount of the suitable intake sound adjusted while suppressing the increase of noise penetration is increased, resulting in the intake sound to the passenger Transmission It is possible to increase the.

2] Although the example applied to the FR vehicle has been described in the above embodiment, it may be applied to the FF vehicle. Further, the present invention may be applied to vehicles such as a horizontally mounted engine, a left side arrangement of a steering, a manual mission, and the like, and the same effect can be obtained regardless of the powertrain specifications such as the engine type and the engine arrangement structure.

3) In addition, those skilled in the art can implement the present invention by adding various modifications to the embodiments without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

  The present invention achieves both improvement in intake sound transmission performance and improvement in appearance in a vehicle intake sound transmission device including a sound guide duct for transmitting intake sound to a vehicle interior and a chamber portion for adjusting the sound quality of the intake sound. To do.

DESCRIPTION OF SYMBOLS 1 Engine room 2 Car compartment 3 Dash panel 3b Harness insertion opening 5 Floor panel 6 Tunnel part 8 Cowl panel 9 Side panel 11 Instrument panel 12a Air-conditioning blower 12b Air-conditioning main-body part 30 Engine 31 Intake duct 40, 40A Intake sound transmission apparatus 41 , 41A Sound guide ducts 42, 42A Chamber portions 44, 44A Sound guide duct downstream portions 44a, 44b Release port V Vehicle

Claims (2)

An inspiratory sound transmission device for a vehicle, comprising: a dash panel that partitions the engine room and the vehicle compartment; a cowl panel that is joined to an upper end portion of the dash panel and projects rearward; and a side panel that forms a side wall of the vehicle compartment. In
A sound guide duct that transmits intake sound from the intake duct that introduces intake air to the engine into the vehicle interior;
A chamber portion provided in the middle of the sound guide duct for adjusting the sound quality of the intake sound,
Than the dash panel and the cowl panel and the side panels and the vehicle width than Rutotomoni the chamber portion is provided in a position close to the outward and the harness insertion opening formed in the dash panel to outlet end of the sound guide duct Is also arranged on the upper side, a vehicle intake sound transmission device. The vehicle bulges upward in the vehicle width direction center portion of the instrument panel that covers the air conditioner disposed in the vehicle width direction center rear side portion of the dash panel and the floor panel that continues to the lower end of the dash panel. A tunnel portion formed in the front-rear direction,
The vehicle intake sound transmission device according to claim 1, wherein at least a part of the powertrain is accommodated below a connecting portion between the tunnel portion and the dash panel .