Anti-noise device for the air intake conduit of a supercharged internal combustion engine

An anti-noise device arranged in an intake air conduit delivering an intake airflow to an internal combustion engine equipped with a turbocompressor, said anti-noise device comprising:

• a turbine arranged in an exhaust gas conduit and driven by exhaust gases produced by said engine and delivered to said turbine in said exhaust gas conduit;
• a compressor arranged in said air intake conduit operative to compress said intake airflow;
• a shaft connecting said turbine to said compressor and driveably transferring rotary motion from said turbine to said compressor for compression of said intake air;
• and
• an anti-noise flap rotatably mounted within said air intake conduit at a position upstream from said compressor relative to said airflow;
• wherein when in said closed position, said flap closes off an airflow passage within said intake air conduit;
• wherein said flap is operable under the force of said airflow flowing to said compressor to rotatably open from said closed position, permitting passage of said airflow through said airflow passage of said air intake conduit;
• and
• wherein said hinged flap is operable under action of a gaseous reflux flowing is a direction opposite to said airflow to rotatably move said flap to said closed position to close off said airflow passage of said air intake conduit.