10
FIA
T DUCA
TO NA
TURAL POWER
FUEL SWITCHING
LOGICS
Management of switching between the
two different fuel supplies is fully auto-
matic, and carried out by the engine con-
trol unit.
When the residual amount of methane
goes below 1/5 of the capacity of the can-
isters, the CNG logo and the lowest lev-
el
Fig. 7
flash to indicate the reserve and
notify the need to refuel.
If the methane has run out, switching to
petrol takes place automatically: the
K
in-
dicator near the CNG symbol
Figs. 8-9
lights up in the instrument panel display.
Having reached the reserve
methane pressure threshold, and
completely filled the methane tank,
the system forces the switch to
petrol for 5 seconds, with the aim of
keeping the petrol fuel supply system
fully efficient.
fig. 7
F0N0402m
The general recommendation is to
avoid emptying the petrol tank com-
pletely, as this may lead to a risk for
the driver:
❒
after having gone below the
METHANE reserve level, the vehicle
continues running on petrol until this
runs out;
❒
in a previous mission, the vehicle ran
out of petrol, and during METHANE
functioning reached the reserve
METHANE pressure threshold: in this
case, the system forces the switch to
petro, and the vehicle turns off whilst
moving.
fig. 9
F0N0404g
fig. 8
F0N0403g
N.B.
Ensure that the key is set to the OFF
position when refilling with methane. If the
system had already forced the switch to
petrol, and you fill with methane with the
key in the ON position, following refu-
elling, the vehicle will continue running on
petrol, until next start-up.
603_83_954 Ducato Nat Power GB 25-03-2009 15:03 Pagina 10
