| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the occurrence of fluctuation in air/fuel ratios among cylinders caused by purging, by reducing the reflection of evaporated fuel in the cylinders into which the evaporated fuel easily goes, and by increasing the reflection of the evaporated fuel in the cylinders into which the evaporated fuel hardly goes. <P>SOLUTION: An air/fuel ratio control device of an internal combustion engine with the plurality of cylinders has a detector for detecting the air/fuel ratio of exhausted gas, a controller for controlling the purging flow rate for feeding the evaporated fuel to the air intake channel of the internal combustion engine, and a calculator for calculating air/fuel ration correcting values (KAF(i)) for each cylinder so as to suppress the fluctuation of the air/fuel ratios in the plurality of cylinders when the purging flow rate is a predetermined value. The air/fuel ratio correcting values for each cylinder is reduced in the cylinders in which the air/fuel ratio correcting values for each cylinder are larger than the average value of the air/fuel ratio correcting values for every cylinder o the plurality of cylinders and the air/fuel ratio correcting values for each cylinder is reduced in the cylinders in which the air/fuel ratio correcting values for each cylinder are smaller than the above average value when the purging flow rate becomes greater than the above predetermined value (S12, KAFPurge(i)). <P>COPYRIGHT: (C)2012,JPO&INPIT |
