| 摘要 |
PROBLEM TO BE SOLVED: To control an intake throttle valve and an EGR valve while ensuring combustion stability. SOLUTION: A target air excess rate λt depending on an engine operating condition is calculated, and a target working medium amount is calculated based on the calculated target air excess rate λt (S1 to S3). An unburned exhaust component amount is predicted (S4), and when the unburned exhaust component amount exceeds a predetermined value, the calculated target working medium amount is corrected to be reduced (S5). Then, the intake throttle valve and the EGR valve are controlled so as to be the target working medium amount after correction (S6 to S8). |
