Charging device for IC engine - comprises inlet air channel connected to engine via inlet valve and mechanical charger in it, with variable valve timing mechanism varying closure time point of inlet valve

摘要

A control unit (30) controls the variable valve timing mechanism (15) in accordance with an engine speed in at least one charge area in which the mechanical charger (5) is ready to operate, feeding charging air into the cylinder (a), so that the closure time point of the inlet valve (14) is operable between an early or advanced time point and a late or delayed time point. A support device (11,12,21-23,24-26,28) causes a dynamic charge effect in the air inlet channel (3), when the closure time point of the inlet valve (14) is at the late point, whereby the mechanical charger (5) is supported in this engine operating range. USE/ADVANTAGE - An improved supercharging device for an IC engine.