Daimler Ag

Wolfgang Lewerenz

Thomas Howe

Berndt Schütz

In an air filter system for an internal combustion engine having a fresh air line with an air inlet, a filter housing with an upper housing half and lower housing half, a filter element disposed in the filter housing, a clean air outlet opening with an adjoining clean air line opening into the intake system of the internal combustion engine, and means for damping intake noise, the means for damping the intake noise is a sheet configured and arranged adjacent, and clamped to, the upper housing half opposite the clean air outlet whereby the intake noise vibration energy is absorbed by frictional relative movement between the sheet and the upper housing half, the intake noise being damped by a change in impedance, in particular by a jump in impedance.

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Weinstadt, Germany

Wolfgang Lewerenz