| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an active sound absorber in which disadvantages which occur through quasi-static differential pressures between front volume and back volume are reduced or eliminated or avoided, wherein at the same time disadvantages which can occur through the formation of condensate in the back volume are reduced or eliminated or avoided. <P>SOLUTION: An active sound absorber (3) for an exhaust system (1) of an internal combustion engine, preferably of a motor vehicle, comprises a housing (7), a connecting pipe (8) for the acoustic and fluidic connecting of the housing (7) with the exhaust system (1), an active membrane (10) which in the housing (7) separates a front volume (12), fluidically connected with the connecting pipe (8), from a back volume (13), and an actuator (11) for vibration stimulation of the active membrane (10). A risk of damage by condensate in the back volume (13) can be reduced by at least one condensation line (14), which fluidically connects the back volume (13) with the front volume (12). <P>COPYRIGHT: (C)2013,JPO&INPIT |
