Self-Study Programme 23 1.8 L 110kw turbo petrol engine 1.8 L 92kw petrol engine.pdf

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l
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SP23-24
The range of engines for the OCTAVIA now also includes a turbochar-
ged four-cylinder petrol engine.
This is based on a group engine range and has been specifically de-
veloped for transverse mounting.
This new engine is the first time that a turbo engine featuring five val-
ves for each cylinder is available as a standard engine in the compact
class.
This Self Study Programme presents to you the engineering and ope-
ration of this 110 kW turbo engine.
Part II of the SSP informs you of modifications to the 1.8-ltr. 92 kW en-
gine in Model Year 98
2
Contents
Part I - 1.8-ltr. 110 kW 5 V-turbo engine
The New Engineering
Technical Data/Technical Highlights
Overview of Systems
Location of Components
Mechanical Components of Engine
Turbocharging
Overview
Turbocharger
Boost pressure control
Fuel shut-off on overrun
Sensors
Actuators
Function Diagram
Cruise Control System
Emission Control System
Self-Diagnosis
Electric Accelerator Pedal
CAN BUS
4
4
6
8
10
12
12
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14
15
16
20
21
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26
27
28
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Part II
- 1.8-ltr. 92 kW 5 V-Engine
Modifications
Variable Intake Manifold
Sensors
Service
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Service Service
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You will find notes on inspection and mainte-
nance, setting and repair instructions in the
Workshop Manual.
3
The New Engineering
1.8-ltr. 110 kW 5 V-turbo engine
Technical data/
Technical highlights
SP23-5
Technical data
Engine code:
Type:
AGU
4-cylinder inline engine/
turbocharger
Displacement:
1781 cm
3
Bore:
81 mm
Stroke:
86.4 mm
Compression ratio:
9.5
Rated output:
110 kW (150 HP) at
5700 rpm
Max. torque:
210 Nm at 1750 up to
4600 rpm
Engine management: Motronic M3.8.2
(M3.8.3 with cruise control
system), electronically
controlled sequential fuel
injection and fully
mapped ignition with cylin-
der-selective knock con-
trol
Technical highlights
–
5 valves for each cylinder
(3 inlet valves, 2 exhaust valves)
Valve timing with 2 overhead camshafts
Exhaust camshaft driven with toothed belt by
the crankshaft
Inlet camshaft driven with chain by the
exhaust camshaft
Cast iron cylinder block
Aluminium alloy cylinder head
Two-mass flywheel
(refer to SSP 22 for operating principle)
Vibration damper at crankshaft
–
–
–
–
–
–
–
4
120
110
105
90
75
60
P (kW)
240
45
210
M (Nm)
30
180
15
150
0
1000
2000
3000
4000
5000
6000
7000
P = Power
M = Torque
n = Engine speed
n (1/min)
SP23-1
–
–
–
Oil pump driven by a chain by the crankshaft
Turbocharger bolted to exhaust manifold
Intercooler in boost air passage just ahead of
the throttle valve body at intake manifold
Rotorless high-voltage distribution with 4 sin-
gle ignition coils, an ignition coil allocated to
each spark plug
Pressure switch for power steering
Clutch pedal switch
–
Reference mark and engine speed detection
by means of sensors at the crankshaft
(60 - 2 gears)
Phase detection by means of 4-window Hall
sensor in separate housing at cylinder head in
front of the inlet camshaft
Exhaust cleaning with lambda control and tri-
metal catalytic converter (rhodium, palladium,
platinum); complies with EU Stage III emis-
sion regulations
Ancillaries (alternator, power steering pump,
AC compressor) driven by ribbed V-belt
–
–
–
–
–
–
5
System Overview
1.8-ltr. turbo engine AGU
Engine control unit Motronic 3.8.2
Engine speed sender G28 and
inductive sensor
Hall sender G40
Cylinder 1
Hot film air mass meter G70
Lambda probe G39
Idling switch F60
Throttle valve positioner
potentiometer G88
Throttle valve potentiometer G69
Clutch pedal switch F36
Intake air temperature sender G42
Power steering pressure switch F88
CAN - BUS H
Coolant temperature sender G62
Altitude sender F96
Knock sensor I G61
Knock sensor II G66
Additional signals
• Cruise control system
• AC compressor
• Fan control
• Electric throttle control*
6
CAN - BUS L

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