Quote:
Originally Posted by head gamez
What is FAS?
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Forced Auto-Stop. From the
CleanMPG, An authoritative source on fuel economy and hypermiling glossary:
FAS
*Could be dangerous if not done right, possibly illegal*
Forced Autostop: A Honda hybrid will AS (Autostop) in various scenario’s although it is very limiting to a given condition. To high a speed, to cold, not enough
SoC (state of Charge), not enough speed since last AS, Defrost or
A/C on except for the AH and HCH-II in specific conditions, etc. will not allow AS … Forcing an AS in any vehicle (other then an
HSD equipped hybrid), aka
Fas , takes these limits out of the equation. Shift to N, let the Tach stabilize,
key back to IG-I (shuts down the ICE and electronics), key back to IG-II to reboot the electronics and coast to a stop or pre-determined lower speed depending on conditions. Recover by starting up
ICE via key to IG-III, release to IG-II, and engage transmission with a rev match to continue on your way. Pro’s include a very noticeable increase in
FE over any short distance trip and is required in a few areas of the US as well as much of Europe, ie. sitting at a stop sign for > 15 seconds or at a stop for > 5 minutes … Con’s include powerless coast, power brake assist is lost after a few uses, power steering is lost although at speed, you do not need it, is illegal in some locales, and possibly both gear reduction starter from excessive
ICE starts and pre-mature wear from re-engagements of the transmission at speed.