How does the ECU Learn?
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How does the ECU Learn?
I was wondering how the ECU really learns and how long does it take? Suppose two new identical cars sit side by side. Each driver will have different driving styles naturally. Would one car's ECU learn to run better than the other? Now suppose the drivers switch cars but bring with them their unique driving style. Would the ECU detect a difference and adjust again?
Last edited by sebring vetran; Aug 24, 2005 at 07:00 AM. Reason: miss spelled word
The ECU doesn't learn driving styles so much, but of elevation, temperature, air, etc. I guess it could learn driving styles, between agressive and passive, but that is probably minor compared to the environmental changes.
Anywyas, how the ECU learns. Basically the ECU will put itself into 'agressive learn mode' if its was just recently reset. When it is in agressive learn mode, the ECU will keep pushing timing and fueling, until it starts to sense knock, then it backs off. It does at all RPM's, under all loads. Eventually, it will have enough data and exit agressive learning mode. From there, it will still make minor adjustments based on the environment details.
I live in an area that gets 100+ in the summer, and ~0 in the winter. Once fall and winter start up, the ECU will start advancing the timing and fueling as it starts to see an average temperature drop. It most likely won't go into 'agressive learn mode' but it will certainly start adjusting itself to the lower temperatures.
Anywyas, how the ECU learns. Basically the ECU will put itself into 'agressive learn mode' if its was just recently reset. When it is in agressive learn mode, the ECU will keep pushing timing and fueling, until it starts to sense knock, then it backs off. It does at all RPM's, under all loads. Eventually, it will have enough data and exit agressive learning mode. From there, it will still make minor adjustments based on the environment details.
I live in an area that gets 100+ in the summer, and ~0 in the winter. Once fall and winter start up, the ECU will start advancing the timing and fueling as it starts to see an average temperature drop. It most likely won't go into 'agressive learn mode' but it will certainly start adjusting itself to the lower temperatures.
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Originally Posted by nKoan
The ECU doesn't learn driving styles so much, but of elevation, temperature, air, etc. I guess it could learn driving styles, between agressive and passive, but that is probably minor compared to the environmental changes.
Anywyas, how the ECU learns. Basically the ECU will put itself into 'agressive learn mode' if its was just recently reset. When it is in agressive learn mode, the ECU will keep pushing timing and fueling, until it starts to sense knock, then it backs off. It does at all RPM's, under all loads. Eventually, it will have enough data and exit agressive learning mode. From there, it will still make minor adjustments based on the environment details.
I live in an area that gets 100+ in the summer, and ~0 in the winter. Once fall and winter start up, the ECU will start advancing the timing and fueling as it starts to see an average temperature drop. It most likely won't go into 'agressive learn mode' but it will certainly start adjusting itself to the lower temperatures.
Anywyas, how the ECU learns. Basically the ECU will put itself into 'agressive learn mode' if its was just recently reset. When it is in agressive learn mode, the ECU will keep pushing timing and fueling, until it starts to sense knock, then it backs off. It does at all RPM's, under all loads. Eventually, it will have enough data and exit agressive learning mode. From there, it will still make minor adjustments based on the environment details.
I live in an area that gets 100+ in the summer, and ~0 in the winter. Once fall and winter start up, the ECU will start advancing the timing and fueling as it starts to see an average temperature drop. It most likely won't go into 'agressive learn mode' but it will certainly start adjusting itself to the lower temperatures.
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