| 摘要 |
PURPOSE:To secure optimum ignition timing at all times, by variably controlling the timing delay value of ignition timing in the cylinder concerned according to a ratio of knock occurring frequency of the said cylinder to the knock occurring frequency of all cylinders at that time each time the knock occurring frequency of each cylinder is discriminated. CONSTITUTION:In this controller, there is provided with an each-cylinder knock strength judging device C which detects knock strength at each cylinder by output of a knock sensor B detecting the knock of an internal combustion engine A, and ignition timing is controlled at each cylinder by an each-cylinder ignition timing device D according to the knock strength judged by this judging device C. Also, there are provided with an each-cylinder discriminating device E discriminating knock frequency at each cylinder by output of the knock sensor B and an all-cylinder knock frequency discriminating device F discriminating the knock frequency of all cylinders. And, according to the ratio of each cylinder knock discriminating frequency to all-cylinder knock discriminating frequency, it is so controlled that the larger the cylinder is of this ratio, the more plentiful in the timing delay value by a ratio response each-cylinder timing delay value variable device G. |
