INTRODUCTION ....................................................................................... 3
FUNCTIONAL DIAGRAM OF THE SYSTEM....................................... 6
BOTTLES ....................................................................................................... 7
SOLENOID VALVE/SAFETY DEVICES ................................................... 8
PIPES ............................................................................................................... 9
PRESSURE REDUCER/REGULATOR ...................................................... 9
NATURAL GAS INJECTORS .................................................................... 9
NATURAL GAS ELECTRONIC CONTROL UNIT ............................ 9
NATURAL GAS/PETROL SWITCH ........................................................ 10
NATURAL GAS AMOUNT INDICATOR.............................................. 11
FUEL CUT-OFF SWITCH ......................................................................... 12
ENGINE STARTING ................................................................................... 12
TO THE FILLING STATION .................................................................... 13
IF A TYRE IS PUNCTURED....................................................................... 14
BOTTLE IDENTIFICATION DATA ........................................................ 15
BOTTLE INSPECTION .............................................................................. 15
SERVICE SCHEDULE................................................................................... 16
BODYWORK VERSION CODES ............................................................ 17
ENGINE ......................................................................................................... 17
FUEL FEED/IGNITION ............................................................................... 18
IGNITION ..................................................................................................... 18
COOLING SYSTEM .................................................................................... 18
PERFORMANCE........................................................................................... 18
WEIGHTS....................................................................................................... 19
DIMENSIONS ............................................................................................... 20
FUELLING AND FILLING ......................................................................... 21
FUEL CONSUMPTION .............................................................................. 22
CO
2 EMISSIONS.......................................................................................... 23
FUSES .............................................................................................................. 23
This enclosure deals with the Fiat
Multipla petrol-natural gas version.
Refer to the Fiat Multipla Owner
Handbook for any subject not covered
by this supplement.
603.83.424 Multipla NatPow gb 5-10-2007 15:27 Pagina 2
18
FUEL FEED (Natural gas)
Electronic injection specific to the natural gas.
Type: Sequential, timed Multipoint injection.
Injection pressure: approximately 9 bar.
Stoichiometric metering of the air/natural gas mixture.
The natural gas injection system is controlled by a
special control unit by making use of the sensors
previously fitted to the vehicle, including the oxygen
sensor for fuel metering control.
IGNITION
Electronics with static advance integrated with
injection.ENGINE COOLING
Engine cooling system with branching-off to bring hot
fluid in contact with the pressure reducer (which is
subject, during its operation, to heavy cooling).
PERFORMANCE
Maximum speeds in the 5
thgear (kph):
petrol fuelling: 168
natural gas fuelling: 157
Any modification or repair made to the fuel feed system in a wrong way and
without considering the technical features of the system may cause operating
anomalies with a risk of fire.WARNING
603.83.424 Multipla NatPow gb 5-10-2007 15:27 Pagina 18
