| 摘要 |
PURPOSE:To prevent the impossible running of an engine and its destruction by estimating an ignition coil to which a driving signal is to be distributed this time from its proceding distribution, and distributing the driving signal to the above-estimated ignition coil when the ignition coil to which the driving signal is distributed on a cylinder identifying signal differs from the above estimated one. CONSTITUTION:A cylinder identifying signal (SGC) level is estimated so as to estimate an ignition to which a driving signal is to be distributed this time from its preceding distribution, and when an estimated SGC level coincides with an actual SGC level, the driving signal is distributed to the ignition coils 8, 9 on the actual SGC level respectively. When both the above-mentioned SGC levels are different, the driving signal is distributed on the estimated SGC level, and when they are continuously different at fixed times or in starting an engine, the driving signal is distributed on the actual SGC level. Thus, oven when noise causes abnormality in SGC, the driving signal can be accurately distributed, and moreover even when estimated information becomes wrong, the driving signal can cope with the above wrong information. In addition to that, since the driving signal is to be distributed truly to the cylinder identifying signal (SGC) without condition in starting the engine 1, the startability of the engine 1 can be improved.
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