Air suction pipe arrangement for supplying fresh air to internal combustion engine of motor car, has sound emission influencing device that is arranged in portion of tube assembly relative to the intended air flow direction

摘要

The air suction pipe arrangement (10) has a tube assembly (14) which encloses tubing wall (12) and a butterfly valve (32). The butterfly valve is moved between different positions relative to the tubing wall to realize the mounting portion of the butterfly valve. A sound emission influencing device (44,64) is arranged in the portion of tube assembly relative to the intended air flow direction (26), and is set as a sound-absorbing device. The micro-perforated surface (50,68a,70a) is provided with the metal foil and/or plastic film (68,70) such as polyolefin film.