Open Loop Idle Control
#4
The I/O 12 box does offer closed loop idle control. Spendy if you're just wanting that feature though. We have one installed on a 1.6 with a Sprint 500. Works well. If you're at all interested in one, let me know. I'll work with you on pricing.
Stack all the rpm points around the target idle speed. If 30% duty will hold the target idle, set it there and then taper the lower rpm points to a higher duty and the higher rpm points to a low duty. Use the coolant axis to create a cold engine idle up scheme. Higher duty at cold temps, lower duty when warm.
Do the same with the timing. When I setup timing I'll find the optimum idle timing and then back it down 2-3 degrees in the target idle rpm range. At lower rpm I'll setup the timing 2-3 degrees higher than the target idle rpm. This way when the rpm tries to fall the timing ramps up and helps steady the idle speed. You can do the same thing with coolant temp compensation.
Stack all the rpm points around the target idle speed. If 30% duty will hold the target idle, set it there and then taper the lower rpm points to a higher duty and the higher rpm points to a low duty. Use the coolant axis to create a cold engine idle up scheme. Higher duty at cold temps, lower duty when warm.
Do the same with the timing. When I setup timing I'll find the optimum idle timing and then back it down 2-3 degrees in the target idle rpm range. At lower rpm I'll setup the timing 2-3 degrees higher than the target idle rpm. This way when the rpm tries to fall the timing ramps up and helps steady the idle speed. You can do the same thing with coolant temp compensation.
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