Silencer insert for motor vehicle exhaust systems or mufflers, especially for motor cycles, has controled flap near outlet allowing flow to outlet bypassing one or more chambers when open

摘要

The device has an inlet (1') and an outlet (1'' ) and several chambers (5,6) in the exhaust gas flow direction between the inlet and outlet. A flap (8) near the outlet that can be controled between open and closed positions allows a flow to the outlet bypassing one or more chambers in the open position; in the closed position of the flap the flow passes through all chambers. Independent claims are also included for the following: a silencer for motor vehicles, especially motor cycles.