| 摘要 |
PURPOSE:To prevent a control matching from failing caused by a so-called play of an idle switch by inputting the target throttle opening to an opening memory under idling drive and preserving it as a memory throttle opening. CONSTITUTION:A decision means I, in which an expected optimum throttle opening corresponding to engine-driving conditions at each point of time is selected to decide a target throttle opening TAGET, is prepared and the newest TAGET is memorized as a memory throttle opening MTA in an opening memory II. When an idle switch 8 is on, the same value as TAGET is inputted to the opening memory II through a renewing means III. Then the system is constituted so that the opening of a throttle valve 2 is regulated by operating an opening control mechanism 7, by which the difference between throttle openings MTA and TAGET is put within an assigned range by a prospect control means IV, under operation range when the idle switch 8 is off.
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