Patent ID: 9206717
Filing Date: 2015-12-08
Classification: F01N,G10K

Abstract:
1. An active sound absorber for an exhaust system of an internal combustion engine, preferably of a motor vehicle, comprising: a housing; a connecting pipe acoustically and fluidically connecting the housing with the exhaust system; an active membrane, which in the housing separates a front volume, fluidically connected with the connecting pipe, from a back volume; an actuator configured for vibration stimulation of the active membrane, wherein at least one condensation line, which fluidically connects the back volume with the front volume, in which vapour contained in the exhaust gas condenses and which directs to the front volume the condensate which occurs; and wherein the condensation line fluidically connects the back volume with the front volume and is configured for pressure equalization without acoustic short-circuit.