| 摘要 |
PURPOSE:To prevent knocking without fail even under the existance of secular change and dispersion by detecting the generation of the knocking using a knocking sensor, and feedback-controlling the supply amount of a knocking depressant in responce to the result of the detection. CONSTITUTION:An input data VKN corresponding to the output signal of a knocking sensor 30 is taken in, and if the condition VKN>compared reference value B is applicable, the existance of knocking generation is judged, and if a jet signal value TALC corresponding to the supply amount of a knocking depressant is less than the upper limit value, the value TALC is increased by a prescribed amount alpha1, and sent out to an output port 60. Namely, the supply amount of the depressant is increased. If any knocking occurs even said value TALC exceeds the upper limit value, a lead angle correction value DELTAtheta is reduced by a prescribed value beta1 in order to delay the ignition timing of an engine. Then, if the condition VKN<B, is applied, and the TALC is larger than the lower limit value thereof without the generation of knocking, the value TALC is decreased by a prescribed amount alpha2. If the lower limit value reduced to zero, the ignition timing is gradually advanced. |
