CONTROL APPARATUS OF AN INTERNAL COMBUSTION ENGINE

In an control apparatus of an internal combustion engine, a technique is provided in which a proper amount of EGR gas can be supplied while making narrower a range within which exhaust pulsation propagates. In the control apparatus of an internal combustion engine including an EGR passage (41) that connects between an intake passage (4) and an exhaust passage (8) of the internal combustion engine (1) so as to circulate a part of an exhaust gas from the internal combustion engine (1) as an EGR gas, and an EGR valve (42) that is arranged at a location between opposite ends of the EGR passage (41) so as to adjust a flow rate of the EGR gas by adjusting a passage area of the EGR passage (41), provision is made for an opening and closing device (46) of a normally open type that opens and closes the EGR passage (41) at an upstream side of the EGR valve (42), and a change unit (90) that changes a degree of opening of the opening and closing device (46).