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--- electrical:12v:alternator [2020/06/25 11:49]
frater_secessus [misc]
+++ electrical:12v:alternator [2020/07/04 14:05]
frater_secessus [effect on GDI engines]
@@ Line 39: / Line 39: @@
 Anecdotally the problem appears to be worsened with **excessive idling**, although this may be a subset of situations where "the engine doesn’t run long enough or hard enough to get hot enough to burn any of the carbon off."((https://automotiverepairphoenix.com/ask-car-guy-can-carbon-build-impact-engine/))
+===== smart alternators =====
+Traditional alternators typically try to hold a set voltage.  //Smart alternators// talk to the vehicle's ECU (compuuter) vary output voltage depending on present conditions.  It might unload the alternator during heavy acceleration to reduce parasitic losses, or run the alternator at high voltage just after starting to speed up the recovery of used energy.((https://www.redarc.com.au/alternator-vs-fixed-alternator))
+The use of plain isolators with smart alternators may result in the rapid cycling of the isolator's circuit (with voltage sensing types) or the discharge of the house battery into the starter battery (solendoid type).
+[[electrical:12v:b2b|DC-DC chargers]] and/or isolators with an awareness of smart alternators may be required.

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