Alfa (Merc, Lada, WV...) driving dynamics DIY?
some BMWs have their alternators disabled/suspended during acceleration and that helps both the go and the consumption. AFAIK, the alternators have two sets of windings - one on the rotor and one on the stator. One of these (I guess the one on the rotor) must receive a bias (magnetic filed generating) current that is varied so that the alternator output voltage is around 14 V regardless of RPM. There is also a relay (I assume) than only connects the alternator to the electric network of the car and the battery when that voltage is OK. So, how about making an electromechanical device to cut off the bias current of the alternator during acceleration? I am imagining a small pipe, curved up - the back end points somewhat upwards, with 2 holes on the sides (in the horizontal bottom part) for a LED and a photo transistor, and a steel ball traveling in the pipe. The current through the photo-transistor (when the car accelerates) will open a normally-closed relay to cut the bias current. Such a simple setup would produce abrupt cut-offs and restarts of the bias current. Would that work? Anyone with knowledge of alternators?
EDIT: A switch like the one on the handbrake, hooked up on the throttle, would be simpler. The question still is: would I burn components with the abrupt changes in the bias current?
Last edited by Borislav; 22-09-08 at 07:14.