Self Study Program 645 – Audi 2.0L TFSI engines EA888 series
VAG SSP 645. This self-study programmme describes the design and function of the 2.0l 4-cylinder TFSI engine from the EA888 Gen.3 MLBevo engine series with power outputs of 140 kW and 185 kW.
The 4-cylinder TFSI engine by Audi represents the next evolutionary step forward, the basis being the third-generation engine. The new engine is available with a displacement of 2 litres and in 2 performance classes, one of which supersedes the previous 1.8l Gen.3 engine of performance class 1 (125 kW to 147 kW).
The aim of Audi’s designers was to reduce both CO2 and particulate emissions in line with statutory requirements. The 2.0l Gen.3 BC engine shows that even fuel economy can be improved while increasing engine displacement. The abbreviation “BC” stands for B cycle, a Miller combustion cycle which has now been refined by Audi.
The engine modifications for both performance classes are identical with respect to the engine mechanicals, where a number of friction-reducing measures have been implemented. There are differences as regards charge cycles and the combustion process.
The performance class 1 engine operates on the Miller cycle, a patent dating from the year 1947. It was premiered in May 2015 at the Vienna Motor Symposium as the most efficient petrol engine in its class.
More than 10 years earlier, Audi put into production the first turbocharged, direct injection TFSI engine and, thus, with the aid of downsizing and downspeeding, set a milestone for “Vorsprung durch Technik”.
Learning objectives of this self study programme:
After you have completed this self study programme you will be able to answer the following questions:
- What are the differences in terms of the engine mechanicals compared with the third-generation engines?
- What are the new features of the lubrication, charging, fuel and injection systems?
- How does the performance class 1 engine differ from the performance class 2 engine?
- How does the Miller cycle work?
- Development of the engine series
- Third-generation MLBevo 2.0l TFSI engine
- Third-generation MLBevo BC (Audi ultra) 2.0l TFSI engine
- Engine mechanicals
- Crankshaft drive
- Engine block
- Engine oil 0W-20
- Cylinder head
- Chain drive
- Engine management
- Air mass meter
- Combustion process
- Miller cycle
- New TFSI combustion process by Audi (B cycle)
- 3-piece oil control rings
- Scope of maintenance jobs
- Test your knowledge
- Self study programmes
- Information on QR codes
The Self Study Programme teaches a basic knowledge of the design and mode of operation of new models, new automotive components or new technologies.
It is not a Repair Manual! Figures are given for explanatory purposes only and refer to the data valid at the time of preparation of the SSP. This content is not updated.
For further information on maintenance and repair work, always refer to the current technical literature.