Self-Study Programme 30 Petrol engine 2.0L 85kw 88kw.pdf

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Maximum power and
torque - minimum
emissions!
SP30_25
The range of petrol engines for the OCTAVIA is supplemented
with the 2.0-litre engine.
This engine is an addition to the EA 113 series.
It makes use of components from the successful Group engine
series.
Consequently, the engine block is similar in design to that of the
1.8-ltr. engine.
The operation of components such as the coolant pump,
coolant thermostat, oil pump and oil pump drive are identical to
that described in SSP 19.
The engine is characterized by control systems which greatly
reduce the level of pollutants in the exhaust.
It complies with the stricter EU IV emission criteria which will be
incorporated in future by legislation in the new European
driving cycle.
This Self Study Programme is intended to make you familiar
with the design of the engine and the new operational features.
Planned further developments are also presented.
2
Contents
Engineering of the 85 kW Engine
System Overview
Positions of Components
Mechanical Components of Engine
Crankcase Breather
Fuel Injection System
Pistons
Sensors
PTFE Seals
Secondary Air System
Emission Control System
Exhaust Gas Monitoring System OBD II
Function Diagram
Self Diagnosis
Further Development of the 88 kW Engine
Test Your Knowledge
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You will find notes on inspection and maintenance,
setting and repair instructions in the Workshop
Manual.
3
Engineering of the 85 kW Engine
Engineering at a glance
SP30_25
Code letter:
AQY
Design:
4-cylinder inline engine
1984 cm
3
Displacement:
Bore:
82.5 mm
Stroke:
92.8 mm
Compression ratio: 10,5 : 1
Rated output:
85 kW (115 HP)
Engine management: Motronic 5.9.2
(electronically
controlled, sequential
fuel injection, fully
mapped ignition,
cylinder-selective knock
control)
Valves per cylinder: 2
Emission control
system:
Lambda control
(2 Lambda probes),
catalytic converter
Technical highlights:
–
–
–
–
distributorless high-voltage ignition
distribution with 2 twin-spark ignition coils
overhead camshaft - OHC
hydraulic bucket tappets
reference mark and engine speed detection
by means of sensor on crankshaft
(toothed gear with 58 teeth and 1 gap of
2 teeth)
phase detection by means of Hall sensor at
camshaft
secondary air system
–
–
4
P = Output
M = Torque
n = Engine speed
SP30_14
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cross-flow cylinder head with swirl port
and power-optimised inlet port
two-section light alloy intake manifold
stainless steel exhaust manifold, with
cylindrical pipe for each cylinder, which
are then merged in pairs (2-branch pipe
manifold), Lambda sensor in front pipe
flange
front exhaust pipe as double pipe
knock control system with 2 knock sensors
new PTFE seals for crankshaft and
camshaft
compliance with EU IV standard
The 2.0-ltr. engine produces power output of
85 kW (115 HP) at a speed of 5200 rpm.
The maximum torque of 170 Nm is available
at 2400 rpm.
Power output and torque are based on
operation of the engine with premium
unleaded RON 95 petrol.
The engine can also be operated with regular
grade unleaded RON 91 petrol.
In this case, however, full power output is not
available.
5
System Overview
Motronic 5.9.2
The new Motronic 5.9.2 introduces a number
of technical improvements regarding starting
of the engine, improved fuel consumption and
reduction in exhaust emissions.
It complies with the requirements of OBD II.
The pollutant emissions are continuously
monitored. Diagnosis relevant to the emission
control is displayed by means of the readiness
code.
Engine speed sender G28
Camshaft position sender G40
Hot film mass air flow sensor G70 and
Intake air temperature sender G42
Throttle valve control unit J338 with
Idling speed switch F60
Throttle valve potentiometer G69
Throttle valve positioner potentiometer
G88
Lambda probe G39
Coolant temperature sender G62
Knock sensor I G61
Knock sensor II G66
Additional signals:
AC compressor on
AC readiness
Road speed signal
6
CAN-Bus -
CAN-Bus +
Lambda probe downstream of catalytic
converter G130

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