Sound generating device as well as vehicle exhaust system

a sound generator and vehicle exhaust technology, applied in the direction of sound producing devices, musical instruments, loudspeaker transducer fixing, etc., can solve the problem of increasing the construction space required for the sound generator, and achieve the effect of improving the sound emission and improving the sound emission of the sound generator

Inactive Publication Date: 2019-05-23
FAURECIA EMISSIONS CONTROL TECH GERMANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent relates to a sound generating device that has a sound channel for controlling the sound waves generated by the device. The sound waves travel in a specific direction and are directed towards the intended audience. The device is designed in a compact way, with the sound channel primarily around the central axis of the device. The output channel can also extend from the front volume of the device to improve the sound emission. In summary, the patent describes a compact and efficient sound generating device that directs sound waves towards the audience.

Problems solved by technology

Owing to the configuration of the sound channel around the central axis, a sound channel is provided that has the necessary minimum length and nevertheless does not increase the construction space required for the sound generating device.

Method used

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  • Sound generating device as well as vehicle exhaust system
  • Sound generating device as well as vehicle exhaust system
  • Sound generating device as well as vehicle exhaust system

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0100]In FIGS. 6 and 7, a further embodiment of the sound generating device is shown that substantially corresponds to the Therefore, only the differences are discussed hereinafter, wherein the same parts or parts with the same function are provided with the same reference signs.

[0101]In FIG. 6, the bottom part 28 is shown with the attached sound generator 24, whereas in FIG. 7, a section through the bottom part 28 is shown.

second embodiment

[0102]In the second embodiment, the housing wall 30 does not fully close the bottom part 28. From the housing wall 30, there is however a shoulder section, on which the sound generator 24 is attached, so that the interior volume of the housing 22 is divided into the front volume 42 and the rear volume 44. The rear volume 44 also extends into the bottom part 28 in the embodiment shown.

[0103]To close the rear volume 44 despite the reduced housing wall 30, the bottom side U is formed continuously, thus limiting the rear volume 44 on the bottom side U.

[0104]Furthermore, the sound generator 36 in the second embodiment is not located on the edge or the exterior wall 46 of the housing 22, but runs very closely around the opening 32 or the shoulder section 40. The distance between the sound channel 36 and the trough-shaped area 34 is approximately the width of the shoulder section 40.

[0105]Another difference of the second embodiment is that the sound channel 36 only extends around the centr...

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Abstract

A sound generating device for a vehicle exhaust system has a housing, a sound generator located in the housing, a housing wall that comprises an opening for the sound generator, and a sound channel that extends in the housing. The sound generator is mounted to a shoulder section of the opening such that the opening is closed by the sound generator and a front side and a rear side of the sound generator are assigned to different sides of the opening. The sound channel acoustically connects the rear side of the sound generator with the front side of the sound generator. The opening and the sound generator comprise a central axis and the sound channel runs at least partially around the central axis.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to DE 10 2017 127 454.5, filed 21 Nov. 2017.FIELD OF INVENTION[0002]The disclosure concerns a sound generating device for a vehicle exhaust system of a motor vehicle as well as a vehicle exhaust system with at least one sound generating device.BACKGROUND OF THE INVENTION[0003]In the case of modern motor vehicles, the provision of sound generating devices in vehicle exhaust systems is known to be capable of influencing the engine noise of the internal combustion engine of a vehicle.[0004]Such sound generating devices are intended, in particular, to generate low-frequency noises, for instance, to attenuate engine noise. Increasing the size of sound generator or the loud speaker would be conceivable to make the generation of low frequencies with greater sound pressure possible.[0005]However, the construction space in a vehicle is limited so that the sound generating device has to be designed as compactly as p...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): H04R1/28G10K15/02H04R1/02B60R11/02F01N1/06
CPCH04R1/2826G10K15/02G10K11/178B60R11/0217F01N1/065H04R1/025F01N3/08F01N3/10G10K11/22Y02A50/20B60Q5/00G10K2210/1282G10K11/17883H04R2499/13
InventorSTEINKILBERG, HANNES
OwnerFAURECIA EMISSIONS CONTROL TECH GERMANY