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Not sure if this hasn't already been proposed, but instead of using sensors to see when the car is in gear, and when the gas/brake/clutch is pressed, etc., why not look at the engine's rpm? If we want to engage the alternator only when accelerating or enginebraking, then it's enough to have it switch on when rpm's get above idle. For example, if idle is 800rpm, then have the alt kick in above 1200, or maybe 1500 to have more low-end torque. There could also be a switch for charging only during enginebraking (battery above 90% full), or enginebraking plus acceleration (batt below 90% + gas pedal pressed). And, of course, a manual override ON-OFF-AUTO switch.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread
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