Sound generator for an exhaust system

摘要

A sound generator (1) for an exhaust system (2) of an internal combustion engine of a motor vehicle (3) includes a housing (4), with an electroacoustic converter (5) having a membrane (6) separating a housing rear volume (9) from a housing front volume (10). A connection pipe (11) connects the front volume (10) of the sound generator (1) to an exhaust gas-carrying exhaust gas line (12) fluidically and acoustically. To reduce the risk of damage to the membrane (6), for example, in case the housing (4) becomes flooded, a pressure equalization line (15) is connected by a proximal end (16) to the housing (4) on the outside and is connected fluidically with the rear volume (9) through an opening (18) in the housing. A distal end (17) of the pressure equalization line (15) is at a spaced location from the housing (4).

主权项

1. A motor vehicle internal combustion engine exhaust system sound generator comprising:
a housing; an electroacoustic converter arranged in the housing, the electroacoustic converter comprising a membrane separating a rear volume from a front volume in the housing; a connection pipe connecting the sound generator to an exhaust gas-carrying exhaust gas line of the exhaust system, the connection pipe connecting the front volume fluidically and acoustically with the exhaust system in a connected state; and a pressure equalization line having a pressure equalization line proximal end connected on to the housing and connected fluidically with the rear volume through an opening in the housing and having a pressure equalization line distal end arranged at a spaced location from the housing, wherein the pressure equalization line has a line length extending away from a rear of the housing, away from to the electroacoustic converter and away from the connection pipe to the distal end, such that the distal end is spaced away from the rear of the housing, and spaced away from the electroacoustic converter and spaced away from the connection pipe by a distance that is greater than at least one of: a diameter of the connection pipe at a connection pipe end facing away from the housing; a diameter of the membrane; and a diameter of the housing in an area of the rear volume.