Patent ID: 7703574

Claim:
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: a first switching state, in which said two sound transmission means are deactivated, wherein said first sound transmission means and said second sound transmission means are in a closed state in said first switching state, whereby one of said separate exhaust gas lines is not in communication with another one of said separate exhaust gas lines, said control means setting said first switching state in a first rpm range; a second switching state, in which one of said first sound transmission means and said second sound transmission means is activated, while another one of said first sound transmission means and said second sound transmission means is deactivated, said control means setting said second switching state in a second rpm range, said another one of said first sound transmission means and said second sound means being in said closed state in said second switching state, said one of said first sound transmission means and said second transmission means being in an at least partially open state in said second switching state such that said one of said separate exhaust gas line is in communication with said another one of said separate exhaust gas line; and a third switching state, in which both of said first sound transmission means and said second sound transmission means are activated, said control means setting said third switching state in a third rpm range, said first sound transmission means and said second sound transmission means being in said at least partially open state in said third switching state, said first rpm range being less than second rpm range, said second rpm range being less than said third rpm range.