Quote:
Originally Posted by Daox
We're getting a bit beyond the initial open/close, but might as well plan ahead.  Do you really thing an ambient temperature sensor is necessary? I would think a loop that monitors coolant temp and adjusts the position would suffice. |
I tend to plan in all of the variables at the start. The ambient temp will affect the rate of fall of coolant temp, and I would try and reach equilibrium rather than flap open and closed. I would look at the delta-T (difference between coolant and inlet air) and then calculate an opening angle.
I would use the radiator fan turning on as the trigger, and back it up with an upper coolant temperature. That would open an amount based on the ambient temp. You could even set an opening rate of x degrees per second and then start the closing when the fans cycle off.
Lots of different ways that will work.
Simon