| 摘要 |
PROBLEM TO BE SOLVED: To switch to a recirculating flow of exhaust gas of using a low pressure EGR device from a recirculating flow of exhaust gas of using a high pressure EGR device, by properly restraining an extreme change in supercharging pressure. SOLUTION: This control device of an internal combustion engine controls a system having a high pressure turbocharger, a low pressure turbocharger, the high pressure EGR device and the low pressure EGR device. Actually, a control means controls a speed for increasing the ratio occupied by an EGR gas quantity recirculated by the low pressure RGR device to the whole EGR gas quantity recirculated to an intake system, by controlling so that a change speed of the supercharging pressure becomes a predetermined value or less by making a feedback process, when switching to the recirculating flow of the EGR gas of using the low pressure EGR device from the recirculating flow of the EGR gas of using the high pressure EGR device. Thus, the extreme change in the supercharging pressure apt to be caused in switching can be properly restrained. COPYRIGHT: (C)2009,JPO&INPIT
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