Quote:
Originally Posted by Funracer
From my thread readings I thought we were setting the OFF time to 45%.
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Nope its the "on" time.
Because 45% let set you the CO screw to a higher CO value.
duty cycle is just a regulator/compensator. Means if the mixture is too rich, it reduces the "on" time.
So a 45% base setting while idling with running lambda control and a hot engine gives you a richer mixture at acceleration and WOT, means when the throttle is opened above 33° angle. And also this affects the cold start wich could result too rich.
In my cpu based ECU I offer, beside the common control you can set the cold start and the acceleration duty cycle independently.
If you stricly follow the factory default by using a CO meter and set the CO to 0.4-0.8% with disconnected sensor plug. Finally with sensor plugged and lambda control running you will get a mas on menos duty cycle of about 60% when idling. Cause 0.4-0.8 CO is significantly leaner than Lambda 1 or an AFR 14.7:1