Self-Study Programme 35 Petrol engines 1.4l 16V 55kw 74kw.pdf

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New modern vehicle concepts such as the Fabia also call for matching
power units.
Consequently, the two new engines
1.4-ltr. – 16 V 55 kW and
1.4-ltr. – 16 V 74 kW
are used on the Fabia.
These engines are representatives of a new generation of engines in
the Group.
In addition to offering a number of new technical highlights, they are
particularly characterised by their lightweight design, improved fuel
consumption, environmental friendliness and low noise emissions.
SP35_13
SP35_13
55 kW/74 kW …
Who's who then?
You will be acquainted with the design and functional
details of the engines in this Self-Study Programme.
2
GB
Contents
Engineering
Engine Mechanical Components
Air Filter
Fuel Supply System
Exhaust System
System Overview
Engine Management System
Emission Control System
Exhaust Gas Recirculation System
Function Diagram
Self-Diagnosis
Test Your Knowledge
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6
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34
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44
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49
Service
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FABIA
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FABIA
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You will find notes on inspection and maintenance,
setting and repair instructions in the Workshop
Manual.
GB
3
Engineering
Technical data
Differences/Common features
1000
2000
1.4-ltr. – 16 V (55 kW) AUA
SP35_04
3000
n (1/min)
4000
5000
6000
7000
SP35_14
Engine code letters
Type
Displacement
Bore
Stroke
Compression ratio
Rated output
Torque
AUA
4-cylinder in-line engine
1390 cm
3
76.5 mm
75.6 mm
10.5 : 1
55 kW at 5000 rpm
126 Nm at 3800 rpm
AUB
74 kW at 6000 rpm
126 Nm at 4400 rpm
4
GB
1000
2000
1.4-ltr. – 16 V (74 kW) AUB
SP35_50
3000
n (1/min)
4000
5000
6000
7000
SP35_15
Engine code letters
Engine management
system
Lambda control system
Knock control system
Ignition system
Emission standard
Intake system
Oil pan
Throttle valve
Fuel
AUA
AUB
Magneti Marelli 4LV multipoint fuel injection
Probe upstream of cat
Probe downstream of cat
1 knock sensor
Rotorless high-voltage distribution system
with 2 double-spark ignition coils
EU4
Plastic intake manifold
Sheet steel
Small cross section
Unleaded petrol 95 RON
(91 possible with reduced output)
Die cast aluminium intake manifold
Aluminium, with integrated engine-
gearbox support
Enlarged cross section
Unleaded petrol 98 RON
(95 possible with reduced output)
GB
5
Engine Mechanical Components
The intake manifold
Two different versions are used in these engines
–
–
1.4-ltr. – 16 V 55 kW engine – plastic
1.4-ltr. – 16 V 74 kW engine – metal
Injectors
Fuel rail
to the cylinders
Intake manifold
(resonance manifold)
Intake air
from filter
SP35_51
Throttle valve
control unit
Intake manifold complete – metal version
The following components are installed at the
intake manifold:
–
–
–
–
Injectors
Fuel rail
Throttle valve control unit
Intake manifold pressure sender with intake
manifold temperature sender
In addition, the intake manifold features two
mounting studs for the engine trim panel with air
filter.
6
GB

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