| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device of an internal combustion engine capable of preventing a wasteful valve opening and closing motion by optimizing a time to execute a fastening preventing motion after stop of an engine to elongate a service life of a valve and to save power.SOLUTION: A control device of an internal combustion engine includes: circulation passages 21, 41 for circulating the exhaust from an exhaust passage to an intake passage of the internal combustion engine 10; valves 23a, 43a for adjusting a flow rate of the exhaust circulated in the circulation passages; a circulation state acquiring portion for acquiring a circulation state of the exhaust in the circulation passages when a predetermined estimation timing comes; a determining portion 60 for comparing the acquired circulation state with a reference state of the circulation state memorized in advance to determine whether a fastening preventing motion to solve or prevent fastening of a valve, is necessary or not; and an instruction information outputting portion 60 for outputting instruction information including an instruction to execute the fastening preventing motion, when the internal combustion engine transits from a rotating state to a stop state, in a case when the determining portion determines necessity of execution of the fastening preventing motion. |
