CONTROL UNIT OF INTERNAL COMBUSTION ENGINE WITH TURBOCHARGER

摘要

PROBLEM TO BE SOLVED: To improve filling efficiency by scavenging to increase engine output and prevent degradation of exhaust catalyst transformation efficiency due to an increase in scavenging gas, in an internal combustion engine including a variable valve gear mechanism and a turbocharger.SOLUTION: A control unit 12 of an internal combustion engine 1 with a turbo type supercharger 5 including a variable valve gear mechanism 14 in at least either an intake side or an exhaust side, comprises: scavenging-air-quantity setting means 12 setting an upper limit value of a quantity of scavenging air passing from an intake passage 2 through a cylinder and blown into an exhaust passage 3 during a valve overlap period for satisfying a performance request for the internal combustion engine 1; and variable valve gear control means 12 controlling a length of the valve overlap period according to the quantity of the scavenging air.SELECTED DRAWING: Figure 8