JP2019009542A - Sound system for vehicle - Google Patents

Abstract

To provide a sound system for a vehicle capable of enabling a driver to fully hear live engine sound with an inexpensive structure.SOLUTION: An engine 30 is arranged on an outer side of a vehicle structure body enclosing a passenger compartment 3. A communication hole 50 is formed on an upper surface of a tunnel part 21 formed in a floor panel 20 and the communication hole 50 is covered by a speaker 60 for audio sound. Live engine sound to be generated by the engine 30 is transmitted to a passenger compartment 3 from a space inside the tunnel part 21 via the communication hole 50 and the speaker 60. The communication hole 50 may be covered by a film member 51 having water tightness and fluid tightness.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle sound system.

  2. Description of the Related Art In a vehicle, an audio device that sends audio sound is generally installed in a vehicle interior. Patent Documents 1 and 2 disclose a technique for localizing an audio sound so that the occupant can hear the audio sound from a predetermined position in the passenger compartment.

Japanese Patent No. 2776092 JP-A-5-85288

  By the way, for example, when enjoying sports driving, it is desired that the driver can sufficiently hear the engine sound. For this reason, it is conceivable to perform an electrical (electronic) process in which engine sound is picked up by a microphone and to flow the engine sound that has been electrically processed from the speaker into the vehicle interior. However, it is costly to electrically process the engine sound and flow it into the passenger compartment. In addition, by performing the electrical processing, the engine sound flowing in the vehicle compartment is not a little different from the raw engine sound.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle sound system in which a raw engine sound can be sufficiently heard by a driver by an inexpensive structure. Is to provide.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1,
A vehicle sound system in which an engine is disposed outside a vehicle structure surrounding a passenger compartment,
In the vehicle structure, a communication hole for transmitting engine sound into the vehicle compartment is formed,
A speaker for flowing audio sound into the vehicle interior is disposed so as to cover the communication hole so that engine sound is transmitted from the outside of the vehicle structure to the vehicle interior.
It is like that.

  According to the above solution, the raw engine sound is effectively transmitted to the vehicle interior through the communication hole, and the driver appropriately recognizes the driving state of the vehicle according to the raw engine sound and the change thereof. And enjoy driving (concentrate on driving). In addition, since it is not necessary to electrically process the engine sound, it can be configured at a very low cost. Furthermore, since the speaker for audio sound is arranged so as to close the communication hole, the position for engine sound and speaker is made common, which is preferable for effective use of space, When the audio sound is being reproduced, the driver can listen to the engine sound and the audio sound from the same position (reducing the burden on hearing). Furthermore, since the communication hole is closed by the speaker, it is preferable for preventing or suppressing foreign matters from entering the vehicle compartment.

A preferred mode based on the above solution is as follows. That is,
The communication hole is covered in an airtight and liquid tight manner (corresponding to claim 2). In this case, entry of foreign matter into the vehicle compartment through the communication hole can be reliably prevented.

  The communication hole is covered with a membrane member for ensuring airtightness and watertightness (corresponding to claim 3). In this case, since water-tightness and liquid-tightness are ensured using the membrane member, an inexpensive speaker that does not have water-tightness or liquid-tightness can be used as the speaker that closes the communication hole.

A tunnel portion extending in the front-rear direction is formed on the floor panel as the vehicle structure,
The communication hole is formed in the tunnel portion;
(Corresponding to claim 4). In this case, the engine sound and the audio sound can be flowed into the passenger compartment through the tunnel portion close to the driver. Further, since the tunnel portion has high rigidity, there is no problem even if the communication hole is formed, and sufficient mounting strength of the speaker can be ensured.

  The communication hole is formed on the upper surface of the tunnel portion (corresponding to claim 5). In this case, the engine sound and the audio sound can be flowed upward in the passenger compartment that is easy for the driver to hear. Further, it is preferable for the passenger in the passenger seat to hear the engine sound and the audio sound in the same manner as the driver.

An engine room in which an engine is arranged through a dash panel as a vehicle structure is configured in front of the passenger compartment,
The space in the tunnel part is opened to the engine room,
(Corresponding to claim 6). In this case, the raw engine sound is effectively introduced into the space in the tunnel, and the engine sound can be transmitted to the vehicle interior through the communication hole very effectively.

  According to the present invention, the raw engine sound can be sufficiently heard by the driver by an inexpensive structure.

The top view which shows an example of the vehicle to which this invention was applied. FIG. 2 is a partial side sectional view of the vehicle shown in FIG. 1. Front sectional drawing which shows the arrangement | positioning relationship between the communication hole for engine sound formed in the tunnel part, and a speaker. The disassembled perspective view of the part shown in FIG.

  1 and 2, the vehicle V is a two-door open car in the embodiment. In the figure, reference numeral 1 denotes a dash panel that partitions the engine room 2 and the vehicle compartment 3. 4 is a bonnet that covers the engine room 2 from above, 5R and 5L are a pair of left and right side doors, 6 is a trunk lid, and 7 is a roof. Reference numeral 8 denotes a driver seat, 9 denotes a passenger seat, and 10 denotes a steering handle. Further, 11 is an instrument panel, and 12 is a front window glass.

  As shown in FIG. 2, the roof 7 has a rear window glass 7a. FIG. 2 shows a state in which the roof 7 is closed, that is, the vehicle compartment 3 is covered by the roof 7 from above. . FIG. 1 shows a state in which the roof 7 is closed, but shows a state in which the roof 7 is seen through, and a state in which the upper end portion of the front window glass 12 is partially cut is shown.

  The floor panel 20 constituting the floor surface of the passenger compartment 3 has a tunnel portion 21 extending in the front-rear direction at the center in the vehicle width direction, and the upper surface of the tunnel portion 21 is covered with a trim material 22. The rear end portion of the floor panel 20 continues to the rear panel 24 via the kick-up portion 23.

  An engine 30 is disposed in the engine room 2 configured in front of the dash panel 1. The engine 30 is vertically arranged in the embodiment, the engine body is indicated by reference numeral 30A, the intake system member is indicated by reference numeral 30B, and the exhaust system member is indicated by reference numeral 30C. A transmission 31 is connected to a rear portion of the engine 30 (engine body 30A).

  The engine 30 is equipped with auxiliary devices such as an alternator driven by the engine main body 30A and an air conditioner compressor, but these are not shown. The engine sound is a sound obtained by mixing the sound generated when the engine body 30A is rotated or burned, the sound of the intake and exhaust, and the sound of driving the auxiliary devices.

  A differential device (differential gear) 40 is disposed at the rear of the vehicle V. The differential device 40 and the transmission 31 (that is, the engine 30) are connected by a propeller shaft 41. That is, the vehicle V is a rear wheel drive vehicle in the embodiment. The transmission 31 and the differential device 40 are connected by an annular torque tube 44 disposed so as to surround the propeller shaft 41.

  An exhaust passage 42 extending from the engine 30 extends rearward. The exhaust passage 42 is connected to a muffler 43 disposed below the rear portion of the vehicle. The muffler 43 is connected to a pair of left and right exhaust pipes 43A opened rearward. The exhaust gas is finally discharged from the exhaust pipe 43A to the outside (atmosphere).

  Next, the part adopted for flowing the engine sound (raw engine sound) into the passenger compartment will be described with reference to FIGS. First, a communication hole 50 is formed in the upper surface of the tunnel portion 21 at a position ahead of the driver. Since the space in the tunnel portion 21 is opened in the engine room 2, the engine sound is sufficiently transmitted to the communication hole 50 through the space in the tunnel portion 21. 3 and 4, reference numeral 21 a denotes a reinforcement for reinforcing the tunnel portion 21.

  The communication hole 50 is covered with a film member 51 that blocks air and liquid. That is, the engine sound from the engine room 2 vibrates the membrane member 51 and is effectively transmitted to the space above the tunnel portion 21. In particular, the low frequency component of the engine sound is transmitted to the space above the tunnel portion 21 through the air chamber inside the substance (paper or the like) constituting the membrane member 51. In the present specification, the term “communication” is used as a meaning encompassing the above two aspects. The membrane member 51 is fixed to the lower surface side of the opening edge portion of the communication hole 50 with an adhesive.

  A speaker 60 is placed and fixed on the upper surface of the tunnel portion 21. That is, the speaker 60 is fixed to the tunnel portion 21 using a fixing tool including the bolt 66 and the nut 67 while being seated on the upper surface of the tunnel portion 21 so as to close the communication hole 50 from above. That is, the speaker 60 covers the communication hole 50 so that the engine sound is transmitted from the outside of the tunnel portion 21 to the vehicle interior. A packing 65 is interposed between the speaker 60 and the tunnel portion 21. Such a speaker 60 receives an audio sound signal and plays the audio sound toward the vehicle interior 3. Since the speaker 60 is located at the center in the vehicle width direction, it is a woofer suitable for low-frequency reproduction, but it can also be used for vocals or for all frequencies of audio sound to be reproduced.

  As shown in FIG. 3, an opening 22 a is formed in the trim material 22 covering the tunnel portion 21 so as to correspond to the position of the speaker 60. The opening 22a is covered with a decorative member 70 having a large number of small holes in a mesh shape so that sound is sufficiently transmitted. The decorative member 70 is exposed in the passenger compartment 3 as shown in FIG.

  From the position of the decorative member 70 described above, both engine sound and audio sound flow toward the interior of the passenger compartment 3. Accordingly, the driver can listen to the engine sound and the audio sound from the same position, and can enjoy the audio sound while concentrating on the driving while listening to the engine sound. The engine sound from the communication hole 50 is transmitted to the passenger compartment 3 side by both passing through the cone paper of the speaker 60 and vibrating the cone paper.

  When performing sports running with the audio device turned off (inactive), only the engine sound flows from the position of the decorative member 70, so that the driver can hear the engine sound more clearly, It is possible to properly recognize the traveling state of the vehicle according to the change and enjoy driving, and it is also preferable for safe driving. In particular, the engine sound heard by the driver is not electrically processed, but is a raw engine sound, so that it is possible to more appropriately recognize the running state of the vehicle according to the engine sound and its change. Become.

  Although the embodiments have been described above, the present invention is not limited to the embodiments, and appropriate modifications can be made within the scope of the claims. In addition to the speaker 60 provided at the position of the communication hole 50, one or two or more speakers may be separately provided (for example, the positions of the left and right end portions of the instrument panel and the vehicle width). Speakers can also be provided separately at the center in the direction, the left and right side doors, the rear of the passenger compartment, etc.). The communication hole 50 covered by the speaker 60 can be provided on the left and right side surfaces of the tunnel portion 21 or in the dash panel 1 (lower portion). In particular, when the engine 30 is disposed on the rear side of the passenger compartment, the engine 30 can be provided on a partition wall with the engine compartment disposed at the rear of the passenger compartment. The membrane member 51 may not be provided. In this case, it is preferable that the communication hole 50 is secured airtight and liquid-tight by the speaker 60 (the speaker paper having water-tightness and liquid-tightness). There is also.)

  The present invention can be applied not only to an open car but also to various types of vehicles such as a sedan type, an SUV type, and a four-wheel drive vehicle. Further, the transmission 31 may be disposed at the rear of the vehicle (the position of the differential device 40), and the front wheel drive vehicle (so-called FF vehicle) that does not have the propeller shaft 41 and the engine 30 are located behind the vehicle compartment. It may be arranged. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  According to the present invention, the raw engine sound can be sufficiently heard by the driver by an inexpensive structure.

1: Dash panel 2: Engine room 3: Vehicle compartment 8: Driver's seat 9: Passenger seat 11: Instrument panel 21: Tunnel part 22: Trim material 22a: Opening 30: Engine 31: Transmission 50: Communication hole (engine (For sound transmission)
51: Membrane member 60: Speaker 65: Packing 66: Bolt (fixing tool)
67: Nut (fixing tool)
70: Decorative member (for sound passage)

Claims (6)

A vehicle sound system in which an engine is disposed outside a vehicle structure surrounding a passenger compartment,
In the vehicle structure, a communication hole for transmitting engine sound into the vehicle compartment is formed,
A speaker for flowing audio sound into the vehicle interior is disposed so as to cover the communication hole so that engine sound is transmitted from the outside of the vehicle structure to the vehicle interior.
A vehicle sound system characterized by the above. In claim 1,
The vehicle sound system, wherein the communication hole is airtight and liquid tightly covered. In claim 2,
The vehicle sound system, wherein the communication hole is covered with a membrane member for ensuring airtightness and watertightness. In any one of Claims 1 thru | or 3,
A tunnel portion extending in the front-rear direction is formed on the floor panel as the vehicle structure,
The vehicle sound system, wherein the communication hole is formed in the tunnel portion. In claim 4,
The vehicle sound system, wherein the communication hole is formed on an upper surface of the tunnel portion. In claim 4 or claim 5,
An engine room in which an engine is arranged through a dash panel as a vehicle structure is configured in front of the passenger compartment,
The space in the tunnel part is opened to the engine room,
A vehicle sound system characterized by the above.

Images