longtermoctane
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longtermoctane [2008/01/23 11:02] 76.100.119.159 created |
longtermoctane [2008/01/24 07:33] twdorris |
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| - | ====== Details ====== | + | ====== The Whats and Hows of LongTermOctane ====== |
| Effectively, the DSM ECU uses two tables to calculate a "basic" ignition advance value. One table is used when the ECU believes fuel octane is at its highest value. The other table is used when the ECU believes fuel octane is at its lowest value. The ECU interpolates between these two extremes by adjusting its idea of fuel octane. This adjustment is done by monitoring knock retard (the amount of ignition delay added in by the ECU in response to knock sensor activity). More detonation means more knock retard and a lower "value" for the ECU's fuel octane rating. | Effectively, the DSM ECU uses two tables to calculate a "basic" ignition advance value. One table is used when the ECU believes fuel octane is at its highest value. The other table is used when the ECU believes fuel octane is at its lowest value. The ECU interpolates between these two extremes by adjusting its idea of fuel octane. This adjustment is done by monitoring knock retard (the amount of ignition delay added in by the ECU in response to knock sensor activity). More detonation means more knock retard and a lower "value" for the ECU's fuel octane rating. | ||
longtermoctane.txt ยท Last modified: 2024/03/15 11:16 (external edit)
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