engine FIAT PUNTO EVO 2009 1.G Natural Power Manual

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FIAT PUNTO NATURAL POWER
The Fiat Punto Natural Power Petrol-
Methane version is dealt with in this ap-
pendix.
For anything not included in this supple-
ment, refer to the Fiat Punto Owner Man-
ual.INDEX
INTRODUCTION ............................................................................................................ 3
SYSTEM FUNCTIONAL DIAGRAM ............................................................................ 5
CANISTERS ........................................................................................................................ 6
SOLENOID VALVES/SAFETY DEVICES ...................................................................... 7
PIPING ................................................................................................................................. 8
PRESSURE REGULATOR/REDUCTION UNIT ......................................................... 8
OIL SEPARATOR FILTER................................................................................................. 8
METHANE INJECTORS .................................................................................................. 8
PETROL/METHANE SWITCH........................................................................................ 8
STARTING THE ENGINE .............................................................................................. 10
PROTECTIVE FUSES ......................................................................................................... 10
FUEL CUT-OFF SYSTEM ................................................................................................ 11
AT THE FILLING STATION .......................................................................................... 11
IDENTIFICATION DATA .............................................................................................. 12
SCHEDULED SERVICING PLAN .................................................................................. 13
WHEELS .............................................................................................................................. 14
ENGINE ............................................................................................................................... 15
WEIGHTS ........................................................................................................................... 17
LOAD COMPARTMENT VOLUME ............................................................................. 17
TYRES .................................................................................................................................. 18
DIMENSIONS ....................................................................................................................19
CAPACITIES ....................................................................................................................... 20
ENGINE OIL........................................................................................................................ 20
CO
2EMISSIONS ............................................................................................................... 20
FUEL CONSUMPTION ................................................................................................... 21
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FIAT PUNTO NATURAL POWER
INTRODUCTION
The Fiat Punto Natural Power version fea-
tures two fuel systems, one for petrol and
one for natural gas (methane).
The two systems are independent of one
another and the methane one is the
phased, sequential, multipoint type.
The starting system runs on petrol and is
the only one.
What is natural gas?
Natural gas is a mixture of gas used as a
main source of energy.
Its main component is methane so for this
reason it is usually known as methane in
Italy but it contains small amounts of oth-
er hydrocarbons and inert gases.
It is extracted in a gaseous stage and trans-
ported to where it is used via gas pipelines;
world reserves are plentiful and evenly dis-
tributed. Methane is fuel with a low impact
on the environment because it significantly
reduces the contribution of the exhaust
gases to the greenhouse effect and creat-
ing pollution.The methane multipoint injection
system
It is an original product from Fiat’s re-
search in the field of alternative fuels that
comes from close co-operation with im-
portant suppliers in the methane sector.
By adapting the sophisticated electronic
control technology of petrol engines to
meet the specifications of methane, it has
been possible to achieve important results
in terms of driveability, exhaust emissions
and consumption.
Using the methane multipoint injection
system the engine offers the same driving
conditions as running on petrol.
It should be borne in mind that, in all dri-
ving conditions, methane operation gives
engine power and torque specifications
that are 10% lower than petrol operation.
Petrol operation is therefore rec-
ommended if a lot of power is re-
quired (e.g. driving uphill with a
laden car, setting off on a steep in-
cline).
Selecting the type of fuel supply
The Fiat Punto Natural Power version is
configured to normally run on methane.When the methane is running out and the
pressure in the canister is close to the cor-
rect operating limit, the system automat-
ically switches to petrol operation.
The engine is always started up using
petrol (to keep this fuel supply system ef-
ficient) and, if the engine was running on
petrol before being switched off, when it
is started up again switching to methane
operation will need to be requested man-
ually.
For this reason there always needs
to be petrol in the tank.
The petrol/methane switch A-Fig. 1,
amongst the controls in the dashboard,
makes it possible to select petrol opera-
tion. The system does not switch auto-
matically to methane operation if the
petrol runs out.
fig. 1F0U0500m
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FIAT PUNTO NATURAL POWER
3) Excess flow,it intervenes if the piping
is broken limiting the flow of methane to
values that are not dangerous.
The flow restricter valve is located to al-
low it to operate even if the solenoid valve
casing is broken due to an impact.
4) Manual tap,it is located upstream of
the solenoid valve.
SOLENOID VALVES/
SAFETY DEVICES
The solenoid valves Fig. 5and Fig. 6are
bolted directly onto the methane canis-
ters with the main function on interrupt-
ing the flow of methane to the supply cir-
cuit.
The solenoid valves are open when:
❒the switching button is in the methane
position;
❒the pressure in the canister is sufficient
for operation;
❒the engine is running;
❒the inertia switch has not been trig-
gered.
The solenoid valve assembly is equipped
with the following safety devices:
1) Fuse pad,in the case of overheating
(temperature above 110 °C), it totally
eliminates the danger of excess pressure
making the methane in the canister flow
out as quickly as possible in a controlled
manner.
2) Mechanical excess pressure device
(Burt Disk),in the case of excess pres-
sure (above 330 bar), it ensures that the
methane escapes as quickly as possible in
a controlled manner.It separates the canister from the methane
system to allow maintenance operations.
The taps are accessible from outside the
car and are located, in the case of the
lengthwise centre canister, at the rear of
the canister and, in the case of the trans-
verse rear canister, towards the right
wheel side.
To close the taps D-Fig. 7: turn the knob
in the direction (1) shown by the arrow
(clockwise
OFF)
To open the taps D-Fig. 7: turn the knob
in the direction (2) shown by the arrow
(anti-clockwise
ON)
5) Single-acting valve,this prevents the
methane from flowing back to the filler.
fig. 5F0M0454m
fig. 6F0M0455m
fig. 7
D
1
2
F0M0456m
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FIAT PUNTO NATURAL POWER
PIPING
The methane piping from the filler to the
pressure regulator/reduction unit is made
from galvanized steel and covered in plas-
tic (high pressure) and is located outside
the passenger compartment; the piping
from the pressure regulator/reduction
unit to the methane injectors is in stain-
less steel.
PRESSURE
REGULATOR/
REDUCTION UNIT
The pressure reduction unit Fig. 8is in-
stalled in the engine compartment.
It has the task of reducing the pressure
of the methane from the value in the can-
ister to the supply value for the methane
injectors (about 6 bar) and keeping it con-
stant in all operating conditions.
METHANE INJECTORS
There are 4 dedicated injectors for the
methane gas A-Fig. 9, fitted on the intake
manifold near the cylinder head, one for
each intake duct; they are supplied at a
constant pressure (about 6 bar) and op-
erated by the electronic control unit.
OIL SEPARATOR FILTER
The oil separator filter Fig. 10is installed
in the engine compartment.
It has the task of separating the excess oil
in the methane.
PETROL/
METHANE SWITCH
This engine normally runs on methane ex-
cept during starting when it runs on
petrol. Switching to methane takes place
automatically and is shown on the instru-
ment panel display by the Ksignal in the
display going out fig. 12.
fig. 9F0M0458m
fig. 8F0M0457m
fig. 10F0M0459m
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FIAT PUNTO NATURAL POWER
The four vertical bars near the letters
CNG in the instrument panel display Figs.
12a-12bindicate the level of methane in
the canisters.
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. 13flash to indicate the reserve and
notify the need to refuel.
If the methane has run out, switching to
petrol takes place automatically: the Kin-
dicator near the CNG symbol Figs. 12a-
12blights up in the instrument panel dis-
play.
If you particularly want the car to run on
petrol, press button A-Fig. 11located be-
tween the controls in the dashboard. The
LED in the button coming on means that
the request to switch has taken place cor-
rectly.
fig. 11F0U0500m
fig. 12bF0M0471m
fig. 13F0M0462m
fig. 12aF0M0461m
If the last fuel system in use
was petrol, when starting the
switch to methane should be
requested manually by the
customer.
The actual change to the chosen fuel sys-
tem takes place depending on the vehicle
usage conditions to guarantee switching in
absolute safety and will be confirmed by
the Kwarning light in the instrument pan-
el display coming on/going off.
The manual selection of the op-
erating mode from petrol to
methane and viceversa is only ac-
tivated if the engine speed is be-
low 2000 rpm.
At the time of the switching
request there will be a metal-
lic noise coming from the valves to
pressurize the circuit (more obvious
with the ignition in the MAR position).
As a result of the switching logics de-
scribed above, it is entirely normal for
there to be a delay between the tick-
ing of the valve and the switching off
at the instrument panel.
WARNING
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FIAT PUNTO NATURAL POWER
Do not switch between the
two operating modes whilst
starting the engine
WARNING
In addition, in the case of starting at out-
side temperatures of below around -10°C,
the switching times from Petrol to
Methane increase to allow the pressure
regulator/reduction unit to become warm
enough.
IMPORTANT If the switching takes place
during acceleration or pick-up, there may
be a brief flat spot (fall in power).With the reconfigurable multifunction dis-
play, any system failure is signalled by the
dedicated message and, at the same time,
by the
Rsymbol coming on and the four
methane levels going out. In this case, go
to a Fiat Dealership as quickly as possi-
ble.
STARTING
THE ENGINE
To carry out the starting manoeuvre, see
the warnings and advice in the Owner
Handbook under the chapter “Starting the
engine”.
PROTECTIVE FUSES
The table below contains a list of the pro-
tective fuses with reference to the
petrol/methane version. For all the other
fuses, consult the Owner Handbook that
this supplement comes with.
If the methane has run out, the control
unit automatically manages the switch to
running on petrol.
Engine compartment junction unit
CONSUMERS FUSE AMPS
Control systemprimary loads
(coils and injectors)
Methane system
CNG system management solenoid valves 22
8415
7,5 SYSTEM FAILURE SIGNALLING
With the multifunction display, any system
failure is signalled through a dedicated
messages and, at the same time, by the
CNG logo and the four methane levels
flashing (with solid bars). In this case, go
to a Fiat Dealership as quickly as possi-
ble.
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FIAT PUNTO NATURAL POWER
FUEL CUT-OFF SYSTEM
The safety switch is triggered in the case
of an impact, cutting off the methane sup-
ply and causing the engine to cut out.
For further information, see the “Fuel cut
off switch” paragraph in the “Controls”
chapter in the Owner Handbook.
AT THE
FILLING STATION
METHANE GAS FILLER
The methane filler is located near the
petrol one Fig. 14.
It is comes complete with a “single-acting”
valve: fitted in the actual filler casing.
To access the filler, undo the cap A - Fig.
15turning it anti-clockwise.
The profile of the filler
Bfor refilling is the
universal type compatible with Italia and
NGV1 standards.
In some European countries adaptors are
considered ILLEGAL (e.g. in Germany).
In the case of service stations with m
3(dif-
ferent pressure) nozzles, to measure the
residual pressure in the canister, the sin-
gle-acting valves must be undone supply-
ing a small amount of methane.
fig. 14F0M0463m
The other plates (handed over with the
car documentation) contain the date for
the first canister inspection.
Those responsible for the methane supply
are not authorized to refill the canisters
when the inspection date has expired.
fig. 15F0M0464m
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FIAT PUNTO NATURAL POWER
INTRODUCTION 1.4
Engine identification code 350A1000
CycleOtto
Number of cylinders and position 4 in line
Number of valves per cylinder 2
Piston diameter and stroke mm 72 x 84
Total capacity cm31368
Compression ratio 11.1 ± 0.2
kW
Max power CEE bhp
at a speed of rpm
Nm
Max torque CEE kgm
at a speed of rpm
Spark plugsNGK ZKR7A-10
Fuel
ENGINE
ENGINE CODE - BODYWORK VERSIONS
Engine code Bodywork version
199AXB1A 02U (3 door/5 seater)
1.4350A1000
199BXB1A 03U (5 door/5 seater)
51
70
6000
104
10.6
300057
77
6000
115
11.7
3000
MethaneGreen petrol
unleaded 95 RON
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FIAT PUNTO NATURAL POWER
FUEL SYSTEM (methane)
Dedicated electronic injection for
methane.
Type: Phased, sequential, multipoint.
Injection pressure; about 6 bar.
Stoichiometric metering of the air/
methane gas mixture.
The methane injection system is con-
trolled by the dedicated control unit us-
ing the sensors already on the car, in-
cluding the Lambda sensor for controlling
the fuel metering.
IGNITION
Static advance, electronic, integrated with
the injection.ENGINE COOLING SYSTEM
Engine cooling system with pressure re-
duction unit heating circuit subject to
strong cooling during operation.
PERFORMANCE
Top speed in km/h.
Running on petrol: 162
Running on methane: 156
Modifications or repairs to
the fuel feed system that are
not carried out properly or do not
take the system’s technical specifica-
tions into account can cause mal-
functions leading to the risk of fire.
WARNING
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FIAT PUNTO NATURAL POWER
TYRES
COLD TYRE INFLATION PRESSURES
Version
1.4
Medium load Full load
Enginefront rear front rear
1.42.2 2.0 2.2 2.2Tyres Rims
185/65 R15 88T 6Jx15” - ET43
195/55 R16 87H 6Jx16” - ET45
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