| 摘要 |
PROBLEM TO BE SOLVED: To achieve both supercharging performance and fuel consumption performance.SOLUTION: An exhaust gas recirculation control device includes: a small type turbo supercharger 62; a low pressure EGR system 80 for recirculating exhaust gas from a downstream side portion of a small turbine 62b out of an exhaust passage 40 to an upstream side portion of a small compressor 62a out of the intake passage 30; a high pressure EGR system 70 for recirculating the exhaust gas from the upstream side portion of the small turbine 62b out of the exhaust passage 40 to the downstream side portion of the small compressor 62a out of the intake passage 30; and a control unit 100. The control unit 100, in an operation region using both the low pressure EGR system 80 and the high pressure EGR system 70, when a shift stage is at a fifth speed or a sixth speed, reduces a boost pressure of the small type turbo supercharger 62 by increasing a recirculation amount of the exhaust gas by the high pressure EGR system 70 than the case where the shift stage is at a first speed to a fourth speed. |
