2.0FSI.pdf

Service Training

Self-study programme 337

The 2.0l FSI engine with turbocharger

Design and function

The new FSI engines from Volkswagen do without stratified injection and place greater emphasis on

output and torque. Until now, FSI direct injection was always associated with stratification. On the

turbocharged engine, the abbreviation FSI remains but there is no stratified charge.

Doing without fuel stratification and NOx sensors represents a loss on one part, but also promises the

finest driving enjoyment with high output and a torquey engine and great pulling power and economy.

In this self-study programme you can familiarize yourself with the technical highlights of this engine.

Further information can be found in

self-study programme no. 322 -

The 2.0l FSI engine with 4-valve

technology.

S337_002

NEW

Warning

Note

The self-study programme shows the design

and function of new developments.

The contents will not be updated.

For instructions on testing, adjusting and repairs,

please refer to the relevant service literature.

At a glance

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Engine mechanics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Engine management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Test your knowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Introduction

Description of the engine

In terms of basic dimensions and design, the

turbo FSI engine is derived from the 2.0l FSI with

engine code AXW.

In order to meet the high expectations of a

turbocharged engine, components of the engine

had to be adapted to specific requirements.

The exhaust manifold and the turbocharger form

one unit.

The exhaust and turbo module is customer

service friendly and is attached to the cylinder

head by a clamping flange.

Exhaust manifold

Solenoid valve for

charge pressure

control

N75

Tu r b o c h a rg e r

Resonance

silencer

Tur bo c ha rg er a i r

recirculation valve N249

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The crankshaft mechanics have been adapted to

the higher demands of a turbocharged FSI

engine.

Piston

Conrod

Crankshaft

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In order to meet the higher levels of power and

heat transfer, the cylinder head has been

adapted to the specific conditions.

The inlet camshaft features continuously variable

valve timing (adjustment range 42° crankshaft

angle).

Cylinder head

Inlet ports

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The optimised balancer shaft gear (AGW) is

driven by a decoupled drive chain sprocket.

The function is similar to that of a dual mass

flywheel.

Decoupled drive chain

sprocket

Balancer shaft gear

S337_006

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