Self Study Program 428 – Audi 3.0L V6 TDI Engine with ultra low emission system (EU6, LEV II, BIN5)

VAG SSP 428. This Self-Study Programme describes the design and function of the exhaust gas aftertreatment system using AdBlue reduction agent.

Audi puts the world’s cleanest diesel technology into series production.

Audi has now taken the TDI’s evolution to the next level by developing the world’s cleanest diesel engine.

To achieve this, the TDI combustion process was systematically improved. The injection system, rated for injection pressures of up to 2000 bar, a radically enhanced exhaust gas recirculation system and an optimised turbocharging system are at the heart of this evolution. A new feature is the integrated cylinder pressure control system. This package of modifications marks the first step towards bringing about a further, marked reduction in untreated engine emissions. The second step will be to reduce the nitrous oxide emissions to a minimum through the use of an active exhaust gas aftertreatment system.

The ultra low emission system allows emissions to be minimised, while enhancing fuel economy by combining intra-engine modifications with an innovative exhaust gas aftertreatment system. The objective was the systematic improvement of the TDI
technology to meet future EU6 limits, as well as LEV II/BIN5, the most stringent limits in force today, so the system is suitable for roll-out, both in Europe and world-wide.

The aims of this Self-Study Programme

By working through this Self-Study Programme, you will be able to answer the following questions:

– What are the exhaust emission limits for petrol and diesel engines according to the applicable emission standards?
– Which process(es) does the combustion chamber pressure sender control?
– Which system components are integrated in the exhaust gas aftertreatment system?
– Why do the elements in the reduction agent tank have to be heated in cold conditions?


  • Introduction
    • Brief technical description of the 3.0l V6 TDI engine with ultra low emission system
  • Engine mechanicals
    • Engine modifications
    • Volume-flow controlled oil pump of the 3.0l V6 TDI engine
    • Exhaust gas recirculation (EGR) system on the 3.0l V6 TDI engine
    • Turbocharging system with charge air circuit
    • Cooling system
    • Cylinder-pressure based combustion control
  • Engine management
    • Common rail injection system
    • Fuel system
    • System overview
  • Exhaust gas aftertreatment
    • System overview
    • Fuel and reduction agent tanks
    • Ram pot in active tank
  • Exhaust gas aftertreatment
    • Reduction agent tank sender G684
    • AdBlue reduction agent
    • Functional principle of the DeNox catalytic converter system
    • Overview of the DeNox system
    • Reduction agent pump V437
    • Reduction agent injector N474
    • Heating the reduction agent system
    • Temperature curve of the reduction agent system heater
    • Display in dash panel insert for reduction agent system
    • Diesel tank misfuel inhibitor
  • Service
    • Handling reduction agent
    • Instructions for customers
    • Instructions for workshops
  • Annex
    • Test yourself
    • Glossary
    • Summary

The Self-Study Programme teaches the design and function of new vehicle models, new automotive components or new technologies.

The Self Study Programme is not a Repair Manual.
Specified values are for explanatory purposes only and refer to the software version valid at the time of preparation of the SSP.

For information about maintenance and repair work, always refer to the current technical literature.

Language: English
Format: PDF
Pages: 48

Self Study Program 428 – Audi 3.0l-V6-TDI Engine with ultra low emission system (EU6, LEV II, BIN5) PDF free online