| 摘要 |
PROBLEM TO BE SOLVED: To improve resolution of an EGR valve in terms of the whole EGR device, and enable an EGR gas flow rate to be controlled finely.SOLUTION: An EGR device of an engine includes: first and second EGR passages connecting the exhaust passage and suction passage of the engine; first and second EGR valves provided in the first and second EGR passages, respectively; and a control unit configured to control the first and second EGR valves. The first and second EGR valves is subjected to valve opening operation one by one. The control unit, when opening the first and second EGR valves, performs valve opening operation of the first EGR valve and valve opening operation of the second EGR valve at mutually different timing and at a predetermined times.SELECTED DRAWING: Figure 3 |
