SSP 233 2.0 litre engine (AQY ATU) [41s].pdf

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Service.
Self-Study Programme 233
2.0-litre Engine
Design and Function
The 2.0-litre engine stems from a successful
engine generation and has a long history.
The engine blocks of the 1.6-litre and 1.8-litre
engines have a similar design.
The functions of components such as the coolant
pump, radiator, oil pump and oil pump motor
are identical.
A notable feature of these engines is their closed
system control loops which greatly reduce the
pollutant emission in the exhaust gases.
The 2.0-litre engine has different structural
design details than the 113 and 827 series.
In this Self-Study Programme, you can familiarise
yourself with the design and function of the 113
series engine and 827 series engine with
intermediate distributor drive shaft.
VW has been fitting the engine with intermediate
shaft in the Golf convertible since May 1999.
The 2.0-litre/88 kW engine with flying camshaft
(Flino) and new functional features will also be
presented.
233_024
New
Important
Note
The Self-Study Programme
is not a Workshop Manual!
Please always refer to the relevant Service Literature
for all inspection, adjustment and repair instructions.
Service Literature.
2
Table of contents
2.0-litre/85 kW engine AQY/ATU . . . . . . . . . . . . . . . 4
Crankcase breather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Fuel injection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pistons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
PTFE oil seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Secondary air system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Emission control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
ODB II exhaust emission monitoring system . . . . . . . . . . . . . . 17
System overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Function diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Self-diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
The 2.0l / 88kW engine will not be introduced!
2.0-litre/88 kW engine ATF/ASU . . . . . . . . . . . . . . . 26
Flying camshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
System overview ATF/ASU . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Function diagram ATF/ASU . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Service interval extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Test your knowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3
2.0-litre/85 kW engine AQY/ATU
Specifications
Differences/common features
233_012
233_013
113 series – engine AQY
827 series – engine ATU
Series
Engine code
Type
Displacement
Bore
Stroke
Compression ratio
Rated power output
Torque
113
AQY
4-cylinder in-line engine
1984 cm
3
82.5 mm
92.8 mm
10.5 : 1
85 kW/5200 rpm
170 Nm/2400 rpm
827
ATU
10.0 : 1
85 kW/5400 rpm
165 Nm/3200 rpm
4
Technical features
Differences/common features
AQY
Engine management
Lambda control
Knock control
Ignition system
Motronic 5.9.2
Probe upstream of catalytic converter
Probe downstream of catalytic converter
2 knock sensors
Static high-voltage distribution with
2 twin spark ignition coils
in dash panel insert
with manual gearbox (EU4) only
Secondary air system without
secondary air injection valve
Premium unleaded (RON 95)
EU 4 Manual gearbox
D4 Automatic gearbox
1 knock sensor
Rotating distributor
ATU
Self-diagnosis fault
warning lamp
Exhaust gas
treatment
Fuel
Exhaust emission
standard
not fitted
Secondary air system with
secondary air injection valve
Premium unleaded (RON 95)
D4 Manual gearbox
D3 Automatic gearbox
AQY
ATU
AQY
ATU
Comparison of performance curves
233_002
Comparison of torque curves
233_001
5
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