| 摘要 |
PROBLEM TO BE SOLVED: To respond to an open failure in one of two EGR valves disposed in series in an EGR passage, to appropriately control EGR.SOLUTION: An EGR device includes: an EGR passage 17; and a first EGR valve 18 and a second EGR valve 19 disposed in series in the EGR passage 17 to control an EGR flow rate in the EGR passage 17. An electronic control unit (ECU) 61 determines an open failure in each of the first EGR valve 18 and the second EGR valve 19. When one of the first EGR valve 18 and the second EGR valve 19 is determined as the open failure, the ECU 61 controls the other valve that has not been determined as the open failure to target opening degrees Tegr1, Tegr2 smaller than predetermined limited opening degrees MAXegr1, MAXegr2. |
