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The filler expansion chamber as well as the
main expansion chamber are combined at the
filler neck upper section and purged via the
gravity float valve by the ACF system.
The gravity float valve prevents fuel from
entering into the ACF system when cornering
at high speed or if the vehicle rolls over.
Filler expansion cham-
ber
Main expansion
chamber
to ACF system
Gravity float valves for vehicles with front-
wheel drive and quattro power train
SSP207/117
