Patent ID: 8745977

Claim:
A mass damper for damping a vibrating system of a motor vehicle, the mass damper comprising: at least one of a damping body forming a countervibrating mass with a damping spring and a springy damping body forming the countervibrating mass, said damping body being indirectly or directly coupled with the vibrating system, said springy damping body or said damping spring comprising an electroactive polymer, wherein the vibrating system of the motor vehicle is an exhaust system of an internal combustion engine, the exhaust system comprising an exhaust gas line with an exhaust pipe and an exhaust gas-treating means integrated in said exhaust pipe; an electric control means electrically connected to said electroactive polymer for actuating said electroactive polymer to set a resonant frequency of the mass damper and/or to generate natural vibrations of the mass damper as a function of an input variable received by said electric control means such that vibration of said exhaust system is reduced via said resonant frequency of said mass damper and/or said natural vibrations of said mass damper.