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Old 10-17-2008, 09:13 PM   #18 (permalink)
Master EcoModder
Join Date: Sep 2008
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Hey guys,
First of all, I wouldn't undertake something like this if you are not comfortable programming a micro computer of some sort, like an Motorola HC11.
Your effots could be put in a better place, like switching over to a manual rack and pinion steering, or plug in battery w/ alternator field kill switch.
Isn't the PWM control just a matter of using a MOSFET controlled by a common PWM chip? For temperature feedback, just mount a sensor on a pipe and use it to increase the duty cycle of the MOSFET. And maybe also add a PWM circuit for the radiator fan as well, and perhaps a servo motor for opening and closing the vents.

BTW, a friend of mine showed me a "desktop supercomputer" she designed the cooling system for. It was complex enough that the cooling system, consisting of a 2HP BLDC scroll compressor, R-410a refrigerant, a large condenser, 9 PZEVs (8 for the main CPUs, one for compressor cooling), and 8 evaporators, had a 200MHz CPU just to run it! Of course, that was because the CPUs had to be kept below -40C to operate correctly. An automobile engine is nowhere near as sensitive to temperature variations as a high performance CPU.
If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...

Allie Moore and I have a combined carbon footprint much smaller than that of one average American...
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