Sound generator for an anti-noise system for influencing exhaust noise and/or intake noise of a motor vehicle

An anti-noise system for at least one of an intake system and an exhaust system of a vehicle driven by an internal combustion engine, the anti-noise system comprising:

• an anti-noise controller;
• and
• a sound generator comprising:
• a loudspeaker basket;
• a membrane supported by the loudspeaker basket;
• a permanent magnet supported by the loudspeaker basket;
• a voice coil carrier supported by the membrane;
• a voice coil supported by the voice coil carrier, the voice coil being disposed in a constant magnetic field created by the permanent magnet;
• and
• a membrane stop, wherein:
• the membrane stop is located on the loudspeaker basket adjacent to the membrane;
• the membrane stop comprises a projection extending towards the membrane;
• the voice coil of the at least one sound generator is operatively connected to the anti-noise controller;
• and
• the anti-noise controller is configured for generating at least one control signal and outputting the least one control signal to the voice coil of the sound generator, with the control signal being adapted to cancel noise inside at least one of the intake system and the exhaust system at least in part in magnitude when the voice coil of the at least one sound generator is operated with the control signal.

A motor vehicle, comprising:

• an internal combustion engine with an engine control unit;
• an intake system in fluid communication with the internal combustion engine and an exhaust system in fluid communication with the internal combustion engine;
• and
• anti-noise system comprising:
• an anti-noise controller;
• and
• a sound generator comprising:
• a loudspeaker basket;
• a membrane supported by the loudspeaker basket;
• a permanent magnet supported by the loudspeaker basket;
• a voice coil carrier supported by the membrane;
• a voice coil supported by the voice coil carrier, the voice coil being disposed in a constant magnetic field created by the permanent magnet;
• and
• a membrane stop, wherein:
• the membrane stop is located on the loudspeaker basket adjacent to the membrane;
• the membrane stop comprises a projection extending towards the membrane;
• the voice coil of the at least one sound generator is operatively connected to the anti-noise controller;
• and
• the anti-noise controller is configured for generating at least one control signal and outputting the least one control signal to the voice coil of the sound generator, with the control signal being adapted to cancel noise inside at least one of the intake system and the exhaust system at least in part in magnitude when the voice coil of the at least one sound generator is operated with the control signal;
• the sound generator is in fluid communication with at least one of the intake system and the exhaust system;
• and
• the anti-noise controller is electrically connected to the engine control unit of the internal combustion engine of the vehicle.