Sound generator system for a motor vehicle

Abstract

A sound generator system for motor vehicles having a housing having a central axis, the housing at least partially delimiting a sound chamber, and having at least one loudspeaker located inside the housing, wherein a first sound-conducting connecting piece having a central axis M1 is acoustically coupled to the housing, the first sound-conducting connecting piece extending the sound chamber in a direction R1 along the central axis M1. At least one second sound-conducting connecting piece having a central axis M2 is acoustically coupled to the housing, the second sound-conducting connecting piece extending the sound chamber in a direction R2 along the central axis M2, wherein direction R1 differs from direction R2.

Claims

1. A sound generator system for motor vehicles, comprising: a housing comprising a central axis, said housing at least partially delimiting a sound chamber and having at least one loudspeaker located inside the housing, wherein a first sound-conducting connecting piece having a central axis M1 is acoustically coupled to the housing and having a first orifice for the sound, said first sound-conducting connecting piece extending the sound chamber in a direction R1 along the central axis M1 towards the first orifice that transmits sound into a rear area of the motor vehicle, wherein at least one second sound-conducting connecting piece having a central axis M2 is acoustically coupled to the housing and having a second orifice for the sound, said second sound-conducting connecting piece extending the sound chamber in a direction R2 along the central axis M2 towards the second orifice that transmits sound into a front area of the motor vehicle, wherein direction R1 of the first orifice differs from direction R2 of the second orifice, wherein a first pipe is connected to the first sound-conducting connecting piece and a second pipe is connected to the second sound-conducting connecting piece, and wherein the housing is neither directly nor indirectly by any pipe coupled to an engine of the motor vehicle insofar that exhaust is conducted by said any pipe.

2. The sound generator system according to claim 1, wherein direction R1 and direction R2 enclose an angle , where 30<=<=180.

3. The sound generator system according to claim 2, wherein at least a first opening is provided inside the housing, to which opening the first sound-conducting connecting piece and/or the second sound-conducting connecting piece is/are connected.

4. The sound generator system according to claim 3, wherein the housing comprises a housing wall, wherein the housing wall comprises at least a first perforation zone P1.

5. The sound generator system according to claim 4, wherein the housing wall comprises a second perforation zone P2, wherein the second perforation zone P2 is located opposite the first perforation zone P1.

6. The sound generator system according to claim 5, wherein at least one additional sound-conducting connecting piece is provided inside the housing wall and/or that at least one additional sound-conducting connecting piece is provided at the first sound-conducting connecting piece and/or at the second sound-conducting connecting piece.

7. The sound generator system according to claim 1, wherein at least a first opening is provided inside the housing, to which opening the first sound-conducting connecting piece and/or the second sound-conducting connecting piece is/are connected.

8. The sound generator system according to claim 1, wherein the housing comprises a housing wall, wherein the housing wall comprises at least a first perforation zone P1.

9. The sound generator system according to claim 8, wherein the housing wall comprises a second perforation zone P2, wherein the second perforation zone P2 is located opposite the first perforation zone P1.

10. The sound generator system according to claim 1, wherein at least one additional sound-conducting connecting piece is provided inside the housing wall and/or that at least one additional sound-conducting connecting piece is provided at the first sound-conducting connecting piece and/or at the second sound-conducting connecting piece.

11. A motor vehicle having a longitudinal vehicle axis A1 and an underfloor with a sound generator system according to claim 1, wherein direction R1 of the first sound-conducting connecting piece extends rearwards with respect to the longitudinal vehicle axis A1 and/or direction R2 of the second sound-conducting connecting piece extends forwards with respect to the longitudinal vehicle axis A1 , wherein a rear area of exhaust pipes and a front area are acoustically coupled by the respective first and second orifices.

12. The motor vehicle according to claim 11, wherein the housing is located below the underfloor, wherein a first perforation zone P1 is located in an area of the housing wall facing the underfloor and/or a second perforation zone P2 is located in an area of the housing wall facing away from the underfloor.

13. The motor vehicle according to claim 11, wherein at least one sound-conducting connecting piece is acoustically coupled/connected to the underfloor, wherein a coupling pipe can be provided between the underfloor and the sound-conducting connecting piece.

14. The motor vehicle according to claim 13, wherein a coupling to the underfloor is effected by means of a flexible coupling member which at least reduces a transmission of the vibrations of the sound generator system to the underfloor.

15. The motor vehicle according to claim 14, wherein the sound-conducting connecting piece is routed via a recess A2 through the underfloor.

16. The motor vehicle according to claim 15, wherein the housing, at least in terms of its form, is at least partially integrated into the underfloor.

17. The motor vehicle according to claim 11, wherein a coupling to the underfloor is effected by means of a flexible coupling member which at least reduces a transmission of the vibrations of the sound generator system to the underfloor.

18. The motor vehicle according to claim 11, wherein the sound-conducting connecting piece is routed via a recess A2 through the underfloor.

19. The motor vehicle according to claim 11, wherein the housing, at least in terms of its form, is at least partially integrated into the underfloor.

20. The sound generator system according to claim 1 wherein a guiding pipe having an orifice is connected to at least one sound-conducting connecting piece.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages and details of the invention will be explained in the claims and in the specification and illustrated in the figures, where

(2) FIG. 1 shows a schematic diagram of the sound generator system in a lateral view;

(3) FIG. 2 shows a schematic diagram of the sound generator system in a view from above;

(4) FIG. 3 shows a schematic diagram according to FIG. 1 with a modified adjustment zone A3.

DETAILED DESCRIPTION OF THE INVENTION

(5) A sound generator system 1 according to FIG. 1 is formed from a housing 1.2 having a loudspeaker 1.1 located inside a housing wall 1.3. Directly connected to the housing 1.2 and/or the housing wall 1.3 are various sound-conducting connecting pieces 1.4, 1.5, 1.6, 1.7, which serve to transmit the sound waves generated by the loudspeaker to the environment, on the one hand, and to an underfloor 3.1 of a motor vehicle 3.

(6) The sound waves are transmitted in a direction R1 with respect to a longitudinal vehicle axis A1 forwards towards the orifice 1.4a via the sound-conducting connecting piece 1.4, with the latter being transmitted, if desired, by a guiding pipe 4 to the orifice 4a, which can also be configured as an exhaust pipe.

(7) Accordingly, the sound waves are conducted via the sound-conducting connecting piece 1.5 in a direction R2 towards an orifice 1.5a towards the rear of a vehicle, if necessary also using a guiding pipe 5, towards the orifice 5a.

(8) The sound generator system 1 shown here is connected to a motor vehicle 3, and/or to a motor vehicle underfloor 3.1. The housing 1.2 and/or an interior of the housing 1.2 is/are acoustically coupled to the underfloor 3.1 by means of the sound-conducting connecting piece 1.6. To this end, a coupling pipe 2.1 having a flexible connection 2.3 such as, for example, a corrugated hose and/or a metal bellows is provided on the end of the sound-conducting connecting piece 1.6. Other vibrations of the housing 1.2 are decoupled by means of the connection 2.3. The coupling pipe 2.1 and/or the connection 2.3 is/are positively or non-positively connected to the underfloor 3.1.

(9) The sound-conducting connecting piece 1.7 is connected to the sound-conducting connecting piece 1.5 and connects the latter via a coupling pipe 2.2 to the underfloor 3.1. A recess A2 is provided inside the underfloor 3.1, through which the coupling pipe 2.2 is inserted through the underfloor 3.1. For the purposes of decoupling the aforementioned vibrations and for sealing purposes, a damping element 2.4, which is not shown further, is provided between the coupling pipe 2.2 and the underfloor 3.1.

(10) According to FIG. 2, both sound-conducting connecting pieces 1.4, 1.5 extend in opposing directions R1, R2. The two directions R1, R2 enclose an angle of 180 with respect to a central axis 1.8 of the housing 1.2. The same applies to the position of the orifices 1.4a, 1.5a and/or those towards orifices 4a, 5a. When defining the respective direction R1, R2 it does not come down to any curvatures or deviations of the sound-conducting connecting piece. Rather, it is the overall alignment of the respective direction R1, R2, therefore the position of the orifices 1.4a, 1.5a, 4a, 5a, which is important.

(11) A perforation zone P1 of the housing wall 1.3 is provided as a further means for acoustic coupling, said perforation zone P1 being positioned on the side of the housing 1.2 facing the underfloor 3.1. In addition, the housing wall 1.3 has an adjustment zone A3 in this area, inside which the form of the housing wall 1.3 and the form of the underfloor 3.1 correspond. This therefore guarantees a larger area, within which as small a distance as possible exists between the housing wall 1.3 and the underfloor 3.1.

(12) In order to improve the sound impression of the sound generator system 1, a further perforation zone P2 is provided on the bottom side, via which the sound waves generated by the loudspeaker 1.1 are emitted, in an amplified manner, to the environment in the direction of a contact area of the vehicle.

(13) The two sound-conducting connecting pieces 1.4, 1.5 are connected to a common opening 1.9 of the housing wall 1.3. According to FIG. 3, it is also possible to provide a separate opening 1.9 inside the housing wall for each sound-conducting connecting piece 1.4, 1.5.

(14) In addition, it is possible to generate the adjustment zone A3 by means of a corresponding geometry of the underfloor 3.1.

LIST OF REFERENCE NUMERALS

(15) 1 Sound generator system 1.1 Loudspeaker 1.2 Housing 1.3 Housing wall 1.4 First sound-conducting connecting piece 1.5 Second sound-conducting connecting piece 1.6 Additional sound-conducting connecting piece 1.7 Additional sound-conducting connecting piece 1.8 Central axis 1.9 Opening 2.1 Coupling pipe 2.2 Coupling pipe 2.3 Flexible connection, corrugated hose, metal bellows 2.4 Attenuator 3 Motor vehicle 3.1 Underfloor 4 Guiding pipe, exhaust pipe 5 Guiding pipe, exhaust pipe Angle A1 Longitudinal vehicle axis A2 Recess, hole A3 Adjustment zone M1 Central axis M2 Central axis P1 Perforation zone P2 Perforation zone R1 Direction R2 Direction