Control Device of Internal Combustion Engine

Abstract

The control device of the internal combustion engine has a variable valve train capable of variable-controlling opening/closing time or lift amount of at least one of an intake valve and an exhaust valve, and a turbo charger. The control device comprises: an internal EGR scavenging ratio arithmetic operation unit to, in a charging status, when intake pressure becomes higher in comparison with exhaust pressure, perform arithmetic operation to obtain an internal EGR scavenging ratio as an internal EGR ratio scavenged from a cylinder to the exhaust pipe and reduced in the overlap duration in which both the intake valve and the exhaust valve are opened; and a unit to control the overlap duration so as to control the arithmetic-operated internal EGR scavenging ratio to a predetermined ratio.

Dependencies are inferred from the claim text.