The air fuel ratio learning value KLR is searched by referring a map based on engine speed NE and base fuel injection quantity Tp, and an air fuel ratio learning correction coefficient KBLRC is set from the air fuel ratio learning value KLR (S6). エンジン回転数NEと基本燃料噴射量Tpとに基づきマップ参照により空燃比学習値KLRを検索し、空燃比学習値KLRから空燃比学習補正係数KBLRCを設定する(S6)。 - 特許庁