Patent ID: 7703574
Filing Date: 2010-04-27
Classification: F01N

Abstract:
1. An exhaust system for a motor vehicle internal combustion engine, exhaust system comprising: two separate exhaust gas lines for removing exhaust gases of a internal combustion engine; a switchable first sound transmission means, which couples said two exhaust gas lines with one another for the transmission of airborne sound; a switchable second sound transmission means downstream of said first sound transmission means, said second sound transmission means couples said two exhaust gas lines with one another for the transmission of airborne sound, a control means for activating and deactivating said first sound transmission means and for activating and deactivating said second sound transmission means as a function of at least one operating parameter of said internal combustion engine to provide at least three switching states for said two sound transmission means, said at least one operating parameter being a revolutions per minute operating parameter of the internal combustion engine, said at least three switching states comprising: