| 摘要 |
PROBLEM TO BE SOLVED: To prevent an EGR rate from exceeding an upper limit value in the process converging the EGR rate to a target value. SOLUTION: A calculation part 24 of an EGR valve control device 10 calculates the opening of an EGR valve 14 in a delay period from the present time when an opening command of a throttle valve 18 is received to an actuation time when the throttle valve 18 is opened according to the opening command. In a storage part 26 of the EGR valve control device 10, the target value of the EGR rate is stored, and at the same time, the upper limit value of the EGR rate is stored as a constraint. The calculation part 24 calculates the opening of the EGR valve 14 within a range not deviating from the constraint in order to converge the EGR rate to the target value. COPYRIGHT: (C)2011,JPO&INPIT |
