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Old 02-08-2009, 01:08 AM   #1 (permalink)
NiHaoMike
Master EcoModder
 
Join Date: Sep 2008
Location: Texas
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"plug-in mild hybrid" upgrade

I have an idea for a device that will offload the alternator and therefore improve fuel economy. Basically, it will consist of some batteries along with a voltage regulator and control electronics. It will be wired to disable the alternator and take over maintaining charge and voltage. Once it is discharged, it will allow the alternator to take over as usual. It can be made easily removable for charging or a charging connector be integrated into the system.

A simple implementation can just be a battery and voltage regulator that connects to a 12v power outlet. Since the outlet cannot handle enough current to run some large loads like the headlights or A/C, it will only partially offload the alternator.

If the alternator is on a dedicated belt, the belt can even be removed to eliminate all the associated friction losses. Of course, automatic switchover will be impossible if that's done.

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