CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

Provided is a control apparatus for an internal combustion engine, which enables to realize control that achieves a scavenging effect more effectively. A variable valve operating mechanism (66, 70) is provided which can vary a valve overlap period in which an intake valve open period and an exhaust valve open period overlap with each other. The valve overlap period is controlled using the variable valve operating mechanism (66, 70) so as to coincide with the timing at which exhaust pulsation exhibits a trough. Specifically, the control of the valve overlap period is differentiated between the case where an offset change occurs in which exhaust pulsation entirely changes in the increasing direction of exhaust pressure, and the case where an amplitude change occurs in which the amplitude of exhaust pulsation changes more greatly than the minimum value of pressure at a trough of exhaust pulsation.