Variable swirl movements generating device for cylinder head of e.g. spark ignition engine, has aerodynamic generating unit constituted of conduit disposed so as to be opened in cylinder in intake duct near valve seat

摘要

The device has an aerodynamic generating unit (61) constituted of a conduit disposed so as to be opened in a cylinder (2) in an intake duct near a valve seat (55). The neutral axis of the duct is inclined with respect to an axis (C) of an intake valve (5). The seat is asymmetric to the duct and is disposed so as to be displaced in a direction with respect to the arrival of the duct defining for favorizing swirling.