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Forced Induction & Engine Management
ECU processor speed..why bother ?
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<blockquote data-quote="soggie" data-source="post: 1928021" data-attributes="member: 6245"><p>Lets take 2 rpm monitors for example.</p><p></p><p>A - process 1000 signals per second</p><p>B - process 100 signals per second</p><p></p><p>Objetive: Rev cut exactly at 7000 rpm. Rate of climb: 3000 rpm per second</p><p></p><p>Ok, now you step on the pedal, both engines hit 6000 rpm after 2 seconds. Now what?</p><p></p><p>On the third second, both rpms climb to 7000, and A cuts it at 7000, while B cuts it at probably 8000-8500 rpm.</p><p></p><p>Why? This is because B's processor is much slower, and couldn't accurately trigger the event scheduled to happen on that very moment, due to slow update-feedback process. The faster ECU captures the change easily, and accurately does its work. In an engine where everything is delicate - an imbalance of fuel/air might lead to serious complications, the speed and accuracy of the ECU becomes a major factor, as in all real-time applications.</p></blockquote><p></p>
[QUOTE="soggie, post: 1928021, member: 6245"] Lets take 2 rpm monitors for example. A - process 1000 signals per second B - process 100 signals per second Objetive: Rev cut exactly at 7000 rpm. Rate of climb: 3000 rpm per second Ok, now you step on the pedal, both engines hit 6000 rpm after 2 seconds. Now what? On the third second, both rpms climb to 7000, and A cuts it at 7000, while B cuts it at probably 8000-8500 rpm. Why? This is because B's processor is much slower, and couldn't accurately trigger the event scheduled to happen on that very moment, due to slow update-feedback process. The faster ECU captures the change easily, and accurately does its work. In an engine where everything is delicate - an imbalance of fuel/air might lead to serious complications, the speed and accuracy of the ECU becomes a major factor, as in all real-time applications. [/QUOTE]
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ECU processor speed..why bother ?