Apparatus for transmitting sound in a motor vehicle

Abstract

An apparatus for transmitting sound in a motor vehicle including a housing (1) with an inside partition (2), which together define or delimit two separate subspaces (3, 4), which in turn are separated by a transmission valve (6) which opens through the partition (2) and can pivot about a pivot axis (5). The first subspace (3) is connected to an intake manifold of an internal combustion engine, and the second subspace (4) is connected to an interior of the motor vehicle. An elastic and at least partially perforated sealing element (8) is provided in a gap (25) between a peripheral edge (7) of the transmission valve (6) and the housing (1).

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to a device for sound transmission in a motor vehicle. [0002] The propulsion motors of modern vehicles are very smooth-running internal combustion engines which generate operating noise that is hardly audible in the interior of the vehicle. Under some circumstances, the operating noise of the internal combustion engine is audible through the secondary noise of the turning wheels, a ventilation system that is turned on, etc. Under certain circumstances, it may be desirable to audibly transmit the operating noise of the driving engine into the interior of the vehicle. [0003] Published European patent application no. EP 1,306,829 discloses a device for transmitting the noise of an internal combustion engine in which a housing having a partition defines or delimits two separate subspaces. The partition is interrupted by a pivotable valve which separates the two subspaces. The first subspace is connected to the intake manif...

AI Technical Summary

Benefits of technology

[0006] Another object of the invention is to provide a device for transmitting sound in a motor vehicle which achieves good sound transmission with a low load on the components.

[0016] The web of the transmission valve is held in particular between the elastic axle journals, forming a continuous axle element together with the axle journals. The sealing strip may be in continuous contact with the web and the axle journals, thus providing a good seal even in the corner areas and / or in the area of the axle journals.

Problems solved by technology

Due to the manufacturing process, the gap must have a certain width, but this has an adverse effect on the sound transmission performance.

The membrane-like sealing frame is subjected to high loads due to the resulting pressure differences in operation, particularly with supercharged internal combustion engines.

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