| 摘要 |
PROBLEM TO BE SOLVED: To materialize air-fuel ratio controlling corresponding to fuel properties after fueling even during increase of injection fuel. SOLUTION: A control device (electronic control device 1) for an internal combustion engine is provided with an air-fuel ratio control means executing normal air-fuel ratio feed back control under normal air-fuel ratio feed back control conditions to execute air-fuel ratio control corresponding to new fuel properties when properties of fuel F in a fuel tank 41 change after fueling. The air-fuel ratio control means compares a targetλvalue and an actualλvalue detected by a wide bandλsensor 84 on an exhaust gas passage 81 and executes air-fuel ratio correction control according to slippage quantity of the actualλvalue and the targetλvalue, when change over to air-fuel ratio control corresponding to new fuel properties after fueling is not completed and control conditions are not normal air-fuel ratio feed back control conditions. COPYRIGHT: (C)2009,JPO&INPIT
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