VORRICHTUNG ZUM ERZEUGEN EINER DREHBEWEGUNG DER LUFTSTRÖMUNG ZUGEFÜHRT AN EINE AUFGELADENE BRENNKRAFTMASCHINE

摘要

A device for imparting a whirling motion on the flow of air for supplying a turbo-supercharged internal-combustion engine is designed to be interposed in the duct for supplying the air upstream of the supercharger (5) for supercharging the engine. The device comprises an elbow-shaped portion of duct (20) and partializing means (23), which are able to limit the section of passage in the upstream branch (21) of the aforesaid elbow portion (20) to an area which constitutes a fraction of the total section of the duct and which is adjacent to a wall of the duct. In this way, the downstream branch (22) of the elbow portion is reached by a tangential flow that gives rise to a helical flow of the air in said downstream branch (22). The device enables creation upstream of the supercharger of a negative pressure sufficient for enabling a recirculation of exhaust gases, upstream of the supercharger, and at the same time imparts on the air flow a whirling movement that enables the supercharger to be exploited in the most efficient way.