| 摘要 |
A first recirculation system (40) includes a first adjuster (45,14) to adjust the exhaust-gas flow rate in a first path (41) connecting an upstream position of a turbine (32) of a VG turbocharger (30) to a downstream position of a compressor (31). A second recirculation system (50) includes a second adjuster (55,13) to adjust the exhaust-gas flow rate in a second path (51) connecting a downstream position of the turbine (32) to an upstream position of the compressor (31). A recirculation controller (63) switches between a single use activating the first or second recirculation system (40,50) and a combination use activating both systems (40,50) by controlling the adjusters (45,14,55,13). A pressure controller (64) executes feedback control of an intake-system pressure through adjusting the opening of vanes (33), and executes feedforward control without the feedback control during a predetermined period from the switching from the single use to the combination use. |
