compression ratio FIAT MAREA 2000 1.G Workshop Manual

Technical Data
Engine
Marea-Marea Weekend
2000 range @
OO.io
SPECIFICATIONS
Cycle OTTO 4 stroke
^Q\^ Timing gear TOHC
1 Fuel system type Integrated electronic injection - ignition
L—,1 Number of cylinders
Ml • • •
4 5
Vt—•F-jZf Cylinder liner
Is—A \ mm
W (bore)
80.5 82
j^J |q| Stroke mm 78.4 75.65
fifi-9 0> °-ace" cm3
1596 1998
^|*^^ Compression
= 9 ratio
ft
10.50 ±0.15 10.5 ±0.15
kW
r _ (bhp) X Maximum
76
(103)
110
(150)
/ power CEE
/ .. ... • rpm 5750 6500
daNm
(kgm)
Maximum
14.5
(14.8)
18.1
(18.5)
, torque CEE
... \ > rpm 4000 3750
10 Print n° 506.763/23

Marea-Marea Weekend
2000 range ©
Technical Data
Engine
SPECIFICATIONS
OO.io
JTD
Cycle
Timing gear
Fuel system type
Diesel 4 stroke
single overhead camshaft
Direct injection
Turbocharger + intercooler
Number of cylinders 4 in line
r
0 Cylinder liner
(bore) mm 82
Stroke mm 90.4
Displacement cm 1910
Compression
ratio 18.45 ± 0.5
kW
(bhp)
Max power CEE
rpm
daNm
(kgm)
Max torque CEE
rpm
81
(110)
4000
20
(20.4)
1500
Copyright by Fiat Auto 29

Technical data
Engine
JTD 100 CV Marea Weekend {_
2000 range ©
OO.io
SPECIFICATIONS
ICETTili JTD 100 cv
Cycle
Timing
Type of fuel system
Diesel 4 stroke
single overhead camshaft
Direct injection
Turbocharger + intercooler
9.
No. of cylinders 4 in line
Cylinder liner
(bore) mm 82
Stroke mm 90.4
&8
Capacity cm 1910
Compression
ratio 18.45 ± 0.5
Max power CEE
Max torque CEE
kW
(bhp)
rpm
daNm
(kgm)
rpm
74
(100)
4000
20
(20.4)
1500
2 Print n° 506.763/25

Marea- Marea Weekend 9"°
2000 range ©
Engine
Fuel feed system
10.
TIMING SENSOR
The Hall effect sensor is fitted to the cylinder head and faces the camshaft pulley.
An opening on the pulley allows the timing sensor to detect the engine timing position and indicate it to
the injection control unit.
The injection control unit uses the timing sensor signal to detect TDC at the end of compression.
Operation
A semi-condulator layer, through which a current passes, immersed in a magnetic field (lines of force per­
pendicular to the direction of the current), produces a difference in power, known as Hall voltage.
If the intensity of the current remains constant, the voltage produced only depends on the intensity of the
magnetic field. The intensity of the field can simply be altered periodically to produce a modulated electri­
cal signal. Signal frequency is proportional to the speed with which the magnetic field changes.
To achieve this change, the sensor is crossed by a metal ring (inner part of the pulley) with an opening.
When it moves, the metal part of the ring covers the sensor to magnetic field and the output signal is
therefore low; Conversely, the sensor generates a high signal at the opening when the magnetic field is
present.
This signal, together with the rpm and TDC signals, allows the injection control unit to identify piston po­
sition and determine injection point.
AIR FLOW METER
(DEBIMETER)
The debimeter is located on the air intake
sleeve and is hot film type.
The debimeter contains an intake air tem­
perature sensor.
Operation
The principle of operation is based on a
heated membrane fitted into a measurement
channel through which engine intake air
flows.
The hot film membrane is maintained at a
constant temperature (about 120 °C higher
than incoming air) by the heater coil.
The mass of air flowing through the measure­
ment channel tends to take heat from the
membrane. To keep the membrane at constant
temperature, a certain current level must flow
through the resistance.
Because this current is proportional to the
mass of air that flows to the engine, it can be
measured with a Wheatstone bridge and the
resulting signal is sent to the injection control
unit.
1. Covers
2. Electronic card
3. Sensor
4. Mounting plate
5. Mount
6. o-ring
7. Temperature sensor
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