This comprehensive 28-page PDF file contains the official VAG Self-Study Program 337 (SSP 337), focused entirely on the development and mechanical function of the iconic 2.0-liter FSI Turbocharged engine. Based heavily on the naturally aspirated 2.0L FSI (EA113), this turbocharged variant (famously powering the Mk5 Golf GTI, Audi A3, and Audi A4) marked a massive shift in Volkswagen’s engine strategy. By combining a turbocharger with direct fuel injection, VW engineers realized they could eliminate the complex and highly-regulated “stratified charge” (lean-burn) mode used on previous FSI engines. Instead, this engine operates purely in a homogeneous charge mode, maximizing power, drivability, and torque without needing NOx storage catalysts. This technical training manual is an indispensable resource for VAG technicians, diagnostic specialists, and GTI enthusiasts.
Please note: As a Self-Study Program, this document focuses on engineering design, structural layouts, and operational theory. It is not a step-by-step rebuild or workshop manual, though the foundational knowledge it provides is crucial for complex diagnostics on early 2.0T engines.
This detailed technical training manual covers the following key engineering topics:
- Engine Mechanics and Block Strengthening: A deep dive into how the naturally aspirated EA113 block was fortified to handle forced induction. It details the upgraded cylinder head (made from a new high-temperature alloy), the sodium-filled exhaust valves, the reinforced crankshaft, and the modified piston rings. It also covers the balance shaft module driven by the timing chain.
- Air Supply and Turbocharging: The core of the 2.0T’s performance. It provides a complete breakdown of the forced induction system, detailing the turbocharger unit that is cast as a single piece with the exhaust manifold. It specifically explains the operation of the crucial N249 Wastegate valve and the N249 Turbocharger Recirculation Valve (diverter valve).
- FSI Fuel Delivery (Homogeneous Charge): A comprehensive look at the high-pressure fuel system. It thoroughly explains the operation of the cam-driven high-pressure mechanical fuel pump (HPFP) capable of 110 bar, the demand-regulated low-pressure fuel system, and how the engine achieves maximum power without stratified lean-burn.
- Engine Management (Bosch Motronic MED 9.1): An overview of the electronic “brain” controlling the engine, detailing the specific sensors and actuators used to manage the complex fuel, ignition, and boost maps.
Whether you are diagnosing a classic diverter valve failure, trying to understand the exact mechanical actuation of the HPFP, or researching the internal differences between the naturally aspirated and turbo FSI engines, SSP 337 is the definitive technical resource.
Further information can be found in self-study programme no. 322 – The 2.0l FSI engine with 4-valve technology.
CONTENTS
- Introduction
- Engine mechanics
- Engine management
- Service
- Test your knowledge
Language: English
Format: PDF
Pages: 28
Self Study Program 337 – The 2.0l FSI engine with turbocharger Design and function PDF free online
