| 摘要 |
PURPOSE:To provide an air-fuel ratio controller wherein exhaust gas property is improved without generating turbulence of the air-fuel ratio caused by exhaust gas recirculation delay following the response delay of a recirculating gas control valve of an exhaust gas recirculating mechanism. CONSTITUTION:When an EGR is turned on, the reference value gtm of a required recirculating gas amount gt is calculated by the actual valve opening LACT of an EGR valve 22 and absolute pressure PBA in an intake pipe 2, and the rotatioanl correction factor KNgt is calculated by the engine speed NE of an engine 1. The atmosphere correction factor KPgt of gt is calculated by the atmospheric pressure PA, and gt is calculated by these calculated values gtm, KNgt and KPgt, and the fundamental fuel amount is corrected on the basis of gt. |
