| 摘要 |
PROBLEM TO BE SOLVED: To improve controllability of EGR amount, for detecting exhaust gas pressure without taking cost and for feeding back the intake air amount to a target value. SOLUTION: Actual intake air pressure pm is calculated (step 208) on the basis of a signal from a pressure sensor, exhaust gas pressure P4 set with respect to an engine speed NE and a fuel injection amount Q is calculated (step 209) from an exhaust gas pressure map, a gain Cp of a proportional term iefbp of the feedback correction amount iefd of an EGR valve opening is calculated (step 210) from a proportional term gain first map, and a proportional term iefb of the feedback correction amount iefb is calculated (step 211) by multiplying the gain Cp to the separately calculated intake air amount deviation gndlt. An integral term iefbis calculated (step 212), by adding a constant Ci to the last value, and the feedback correction amount iefb is calculated (step 213) by adding the proportional term iefbp and the integral term iefbi. |
