| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine, appropriately discriminating which of the capability of an EGR cooler and the capability of an EGR catalyst is reduced. Ž<P>SOLUTION: This control device for the internal combustion engine is suitably applied to the internal combustion engine provided with an EGR device. When EGR gas is introduced by the EGR device, a determination means determines reduced capability of the EGR catalyst or the EGR cooler based on a phase at a crank angle when a peak value is generated at intake pressure and a correction amount during air-fuel ratio feedback control. Thereby, it is possible to appropriately discriminate which of the capability of the EGR cooler and the capability of the EGR catalyst is reduce. Accordingly, introduction of deposits into an intake system and clogging of the EGR cooler can be effectively suppressed. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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