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Exhaust system for internal combustion engine and vehicle with exhaust system

A technology for exhaust systems and internal combustion engines, which is applied in exhaust treatment, exhaust devices, gas chambers, etc., and can solve problems such as attenuation and high consumption.

Pending Publication Date: 2020-05-08
FAURECIA EMISSIONS CONTROL TECH GERMANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in some driving situations engine noises occur which cannot be damped satisfactorily or can only be damped with great effort by the known sound generating systems

Method used

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  • Exhaust system for internal combustion engine and vehicle with exhaust system
  • Exhaust system for internal combustion engine and vehicle with exhaust system
  • Exhaust system for internal combustion engine and vehicle with exhaust system

Examples

Experimental program
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Effect test

no. 1 approach

[0045] The exhaust system 10 comprises two exhaust pipes 12 , 14 which extend adjacently, in particular parallel, in the longitudinal direction of the vehicle. In this case, the exhaust lines 12 , 14 are arranged downstream of the intermediate silencer 16 and are in flow connection with the silencer body of the intermediate silencer 16 . That is, the exhaust pipes 12, 14 extend from the center muffler 16 to the exhaust outlet.

[0046] Arranged in one of the two exhaust lines 12 , 14 is a valve 18 which can selectively block or release the flow path through the corresponding exhaust line 14 . The valve 18 comprises, for example, a flap.

[0047] exist figure 1Two alternative possible positions of the valve 18 are shown in , near the upstream or downstream end of the exhaust pipe 14 . In practice, however, usually only one valve 18 is arranged in the exhaust pipe 12 , 14 .

[0048] When the valve 18 is closed, the effective flow cross section of the exhaust system 10 is red...

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PUM

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Abstract

An exhaust system (10) for an internal combustion engine (46), especially for an internal combustion engine of a motor vehicle (44) is provided. The exhaust system has at least two exhaust pipes (12,14) for guiding exhaust gas, the exhaust pipes extend at least partially adjacent to each other along the longitudinal direction of the vehicle, and the exhaust system also has a sound generating system (20) having at least one sound generator (22) electrically operable, the sound generating system generates sound to superimpose the sound of the internal combustion engine carried by the exhaust gas flow, a valve (18) is arranged in at least one exhaust pipe (12, 14), which can selectively block or release the flow path passing the exhaust pipes (12, 14). In addition, there is a common sound guide channel (24) into which the exhaust pipes (12, 14) extend.

Description

technical field [0001] The invention relates to an exhaust system (exhaust system) for an internal combustion engine and to a vehicle having an exhaust system (exhaust system). Background technique [0002] It is known in modern vehicles to provide active sound-generating systems (acoustic systems) in the vehicle exhaust system in order to be able to influence the engine noise of the internal combustion engine of the vehicle. [0003] Such sound generating systems are used in particular for generating low-frequency noise, for example for suppressing engine noise. [0004] However, in some driving situations engine noises occur which cannot be damped satisfactorily or can only be damped with great effort by known sound generation systems. Especially at low rotational speeds, the undesired noise carried by the exhaust flow is often louder than the volume level achievable by the sound generating system. Contents of the invention [0005] It is therefore an object of the pre...

Claims

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Application Information

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IPC IPC(8): F01N13/08F01N13/00F01N1/06
CPCF01N1/065F01N13/007F01N13/08F01N13/087F01N2240/20F01N2240/36F01N2470/04F01N2470/10F01N2470/14F01N2470/16F01N2490/18
Inventor T·斯坦纳C·科伯K·福尔纳J·图纳德雷
Owner FAURECIA EMISSIONS CONTROL TECH GERMANY
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