| 摘要 |
PURPOSE:To obtain stable opening degree detection accuracy over the entire opening degree range by performing learning operation in such a direction that a step in detected value generated by the switching of a valve opening degree detecting means is eliminated when the varying speed of a throttle valve opening degree is smaller than a specific value. CONSTITUTION:Output voltages VS1 and VS2 from 1st and 2nd potentiometers of a throttle sensor S are inputted to a controller 21 to retrieve the learnt correcting value DELTAVS of the voltage VS2 stored in a RAM. For example, when VS1<4.5V, the throttle valve opening degree detected value alpha1 is operated. Then the varying speed of the throttle valve opening degree is operated as the difference between the voltage VS1 which is inputted currently and the last input VS1 and when the difference is smaller than the specific value, a throttle valve opening degree detected value alpha2 is operated from the voltage VS2. Then when alpha1>alpha2, the correcting value DELTAVS is increased by a specific quantity and when alpha1<alpha2, the value is decreased by a specific quantity; when alpha1=alpha2, the opening degree alpha1 is set in a register without being corrected. Thus, the correcting value DELTAVS which is corrected and updated is stored in a RAM, so the reliability of learning is high.
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