| 摘要 |
PURPOSE: A method for controlling ignition time using a knock sensor signal of a vehicle is provided to improve the performance and durability of an engine by making an ECU(Electronic Control Unit) select and control a proper ignition time. CONSTITUTION: A method for controlling ignition time by using a knock sensor signal of a vehicle comprises the steps of deciding the use of RON95 by a present spark table(110), deciding if a unit mileage is over a specific distance(120), determining a waited knocking counter is the multiplication of knocking counter by total counter(130), adding the waited knocking counters to obtain a total counter(140), determining the last knock as one if the total counter is over the threshold of the knock RON95(150), changing the spark table to RON92 if the number of knock ROB95 one is over five(180), and resetting the unit mileage(190).
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