Version With Methane System (Natural Power) - Fiat Qubo Owner's Handbook Manual

VERSION WITH
METHANE SYSTEM
(Natural Power)
27) 28) 29)
5) 6) 7)
INTRODUCTION
The Fiat Qubo Natural Power version
features two fuel systems, one for
petrol and one for natural gas
(methane).
Selecting the type of fuel supply
Fiat Qubo Natural Power is configured
to run normally on methane gas.
When the methane is running out and
the pressure in the cylinder is close
to the correct operating limit, the
system automatically switches to petrol
operation.
The engine always starts up on petrol,
with automatic switching to methane
when the best conditions are achieved
(engine water temperature, minimum
engine rpm limit) for switching to
methane.
Therefore, there must always be some
petrol in the tank (at least 1/4 full), in
order not to compromise the operation
of the fuel pump.
For this reason there must always
be petrol in the tank.
The petrol/methane switch fig. 59,
amongst the controls in the dashboard,
makes it possible to select petrol
operation. The system does not switch
automatically to methane operation if
the petrol runs out.
59
IMPORTANT If gas is smelled, switch
from methane operation to petrol
operation and immediately go to a Fiat
Dealership to have the vehicle checked
and possible system faults excluded.
CYLINDERS
The vehicle has two cylinders (total
capacity about 77 litres) located under
the floor and protected by two special
guards.
The cylinders fig. 60 and fig. 61 are the
tank that contains methane in
compressed gaseous state (200 rated
bar at 15 °C).
The methane, stored in the canisters at
high pressure, flows through a
dedicated pipe to reach the pressure
regulator/reduction unit which supplies
the 4 methane injectors at low pressure
(about 6 bar).
Cylinder capacity: about 13 kg. The
amount of methane depends on the
outside temperature, the supply
pressure, the quality of the gas and the
type of refuelling system. Total cylinder
volume about 77 litres.
F0T0343
60
61
F0T0345
F0T0356
33