| 摘要 |
PURPOSE:To exhibit high response of learning control by discontinuing upon elapsing predetermined time even if not reaching to the learning number and forming a learning map forcefully. CONSTITUTION:Basic fuel injection Tp is determined on the basis of engine intake airflow QA and rotation N to produce a rough theoretical air-fuel ratio (A/F=14.7) while to correct the air-fuel ratio through feedback control of air- fuel ratio correction factor (a) by means of a signal from O2 sensor 142 thus to obtain accurate theoretical air-fuel ratio and to correct the fluctuation or againg of characteristic of various actuator or sensor relevant to the air-fuel ratio control by means of the learning factor Ke. In learing factor table, the learning factor Ke is written at the splitting point to be determined by the basic fuel injection time Tp and the engine rotation N and performed when the maximum and the minimum levels of the air-fuel ratio correction factor will be at the outside of the upper and the lower limits by (n) times but it is discontinued upon elapsing of predetermined time thus to prepare a table. |
