| 摘要 |
<p>A fuel injection amount control apparatus calculates as a proportional term a value obtained by multiplying by a proportional gain Kp a deviation DVoxslow between a downstream side target value Voxsref and an output value Voxs of a downstream side air-fuel ratio sensor disposed downstream of a catalyst. The control apparatus calculates a time integrated value SDVoxslow by integrating a value obtained by multiplying by a predetermined adjustment gain K the deviation DVoxslow, calculates a value that is commensurate with the time integrated value SDVoxslow as an integral term Ki×SDVoxslow, and obtains the integral term Ki×SDVoxslow as a sub-FB learned value KSFBg. The control apparatus sets the proportional gain Kp at a small value after the sub-FB learned value KSFBg is determined to have converged, and sets the adjustment gain K at a small value after the sub-FB learned value KSFBg is determined to have converged.</p> |
