Internal combustion engine for motor vehicle, has controlled deformable diaphragm projecting inside intake port in deformed position, for forming deflector accelerating inlet gas flow to produce tumble type streamlined movement for flow

摘要

The engine has an intake port (26) with a controlled deformable diaphragm (40) that adopts the shape of an inner wall (42) of the intake port, in a neutral position. The diaphragm projects inside the intake port, in a deformed position, for forming a deflector which accelerates the inlet gas flow from a valve (30) to produce a tumble type ordinal streamlined movement for the flow.