google for m2-atx / m4-atx should answer your question, i think ?
My OLD 2001 Mitsubishi Eclipse GT:
"The Project That Never Ended, until it did"
next project? subaru brz
Question: Does the alternator vary it's Drawing load (i.e., takes away power from.. Can't believe I'm forgetting this! in essence, less goes to the wheel.) as demands increase, or does it always draw the same load and simply limits the output as the v.reg demands?
The reason I ask is to see if a carputer would have any effect on the MPG or HP, and I don't completely understand alternators.
in theory, every light you turn on takes away energy, so would affect your MPG ...
But, in case of a normal carputer (not some extreme machine with more power than your engine has) you wouldn't really notice it ... (at least when you're using for example a m2-atx, when you have an alternator from 12 - 220 (or 110) and then a normal pc that takes it back to 5 and 12V, well that isn't really efficient offcourse..)
wait.. by alternator i mean a sort of transformator, that transforms 12V to (in your case) 110V .. They are used to be able to put normal in-house machines in a car (for example your shaver). You could also put a PC or a gamecomputer on it. But i wouldn't recommend it.
What you mean, is the 12V generator on your engine ? I think we are talking about other things ...
have you looked up "m2-atx" to see what it is, and what it does? Maybe then you understand what I am trying to explain.
M2-ATX is basically an atx powersupply that uses the standard automotive 12v and makes it usable.
But that's not what I mean.. What I mean is, the alternator in the engine compartment that's ran by the serpentine belt... Does it always "create" the same amount of power, and some of it is goes to waste if the vehicle / battery cannot use it all.. Or, does it not waste and instead it increases/decreases tension on the serp belt for changes in required power, or does it use gears, etc.?
Ok, in that case sorry, I misunderstood your question.
There are no gears in an alternator, and there also is no system that increases the tention on the belt or something like that, I'm sure about that. Normally, RPM of the engine determines how much energy is "created". the "car" takes what it needs, and the rest is used to charge the battery. If the car takes more than the alternator generates, the rest is taken from the battery. This is the theory.
But now, i do know that when you, for example, turn on your airconditioning, your car DOES use more fuel ... Now how that is possible? I'm not sure .. I gues that when the car demands a lot from the alternator, it produces more friction (right word?) in the alternator, so that the engine loses more power in making it turn round then it does when you are just driving, no airco, no lights, no radio etc.
But, why do you want to know this ??