| 摘要 |
PURPOSE:To precisely control EGR to a high-load area by calculating the indication opening of an exhaust gas re-circulating valve based on the intake pipe pressure or intake air quantity and engine rotating speed, and correcting the throttle opening accordingly when it is the preset value or above. CONSTITUTION:An arithmetic means D calculates the indication opening STEP of an exhaust gas re-circulating (EGR) valve based on the intake pressure PM or intake air quantity Q detected by the first sensor A and the engine rotating speed NE detected by the second sensor B. When the throttle opening TA detected by the third sensor C is the preset value or above, i.e., in a high-load area, the indication opening STEP is corrected by a correcting means E according to the throttle opening TA, and a control means F adjusts the opening of the EGR valve with the corrected indication opening ESTEP. EGR can be precisely controlled to a high-load area without deteriorating driveability. |
