| 摘要 |
This control apparatus is for an internal combustion engine (100) having an injector (27) for directly injecting fuel into a combustion chamber (46) of a cylinder (42), and a spark plug (28) for igniting mixed air containing the fuel injected by the injector; the control apparatus being provided with an air/fuel ratio acquisition unit (11) for acquiring the air/fuel ratio of the mixed air in the combustion chamber, a nitrogen oxide concentration acquisition unit (12) for acquiring the nitrogen oxide concentration of combustion gas discharged from the internal combustion engine, and a stratification degree estimation unit (16) for estimating a stratification degree, which is the degree to which mixed air at or below a prescribed air/fuel ratio determined in advance is distributed in the vicinity of the spark plug. The stratification degree estimation unit estimates the stratification degree on the basis of the air/fuel ratio acquired by the air/fuel ratio acquisition unit and the nitrogen oxide concentration acquired by the nitrogen oxide concentration acquisition unit. |
