| 摘要 |
PURPOSE:To control air-fuel ratio properly by calculating the learned data on the basis of the average from the summed value of precedent data and new data detected regarding to the engine state and changing the constant of the weightel average according to the engine state to determine the quantity of fuel supplied on the basis of the learned data. CONSTITUTION:To make such learning control that the optimum quantity of fuel can be supplied, a constant Sn is selected on the bases of both the pressure in the intake port of an engine and the engne speed. For example, as constants Sn, three constants S1 to S3 are set in accordance with both the stability of the engine and the stable duration thereof. If the stability is low regardless of the length of the stable duration of the engine, the constant S1 is selected, if the stability is high and the stable duration is short, the constant S2 is selected and if the stability is high and the stable duration is long, the constant S3 is selected. To make such selection, the detected signals from a pressure sensor 5 and revolution speed sensor 8 are sent to computer 10 to calculate learned data alpha from the specified formura using the appropriate selected constant and based on said learned data alpha, the proper quantity of fuel supplied is determined to control a fuel injection valve 11.
|
