| 摘要 |
An object of the present invention is to restrain a deterioration of emission even if the actual control condition including the required torque is different from the set control condition. An ECU (5) establishes a control amount of an EGR valve (42) in such a manner that a condition amount, which is a control parameter controlling the EGR valve (42), is established as a target value. The ECU (5) selects the condition amount as the control parameter among a fresh-air amount, an exhaust oxygen concentration, and an intake oxygen concentration, in which an operation amount of the EGR valve (42) is minimum. <IMAGE> |
