Exhaust gas diffuser-mixer for internal combustion engine of motor vehicle, has endless screw to drive closing unit by displacing closing unit along side wall of conduit to partially close inlet opening

摘要

The diffuser-mixer has an endless screw (7) to drive a closing unit (4) by displacing the unit (4) along a side wall of a conduit (11) to partially close an inlet opening (115), through which a fraction of flow of exhaust gas circulating in a conduit (2) enters into the conduit (11). The closing unit has an inlet opening (41) that permits to create a jet of exhaust gas in the conduit (11). The conduit (11) allows circulation of air and air-exhaust gas mixture, and the conduit (2) that is perpendicular to the conduit (11) allows re-circulation of the exhaust gas.