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Audi has again extended its current vee engine series to include an additional power plant. The new 2.8l FSI engine fills the gap between the 2.4l MPI engine, which will be produced until mid 2008, and the 3.2l FSI engine. Moreover, this engine is a new technology platform. Featured new technologies are ● the Audi valvelift system, ● a flow regulated oil pump with dual stage pressure control and ● trioval sprockets. The primary targets for development were to improve friction and fuel efficiency. Internal engine friction was reduced through the following modifications ● Reduction of pre load on the 2nd and 3rd piston rings ● Use of the Audi valvelift system small intake stroke at partial throttle ● Reduction of the exhaust valve stroke 10 mm 9 mm ● Replacement of the bucket tappets in the high pressure pump drive with cylindrical tappets ● Adoption of roller chains for chain drives A to C ● Development of trioval sprockets with a friction enhanced chain tensioner design ● Downsizing of the oil pump ● Integration of an oil pump flow regulator with dual stage pressure control ● Downsizing of the coolant pump and increasing of the thermostat temperature The new technologies will also be featured on forthcoming versions of the current engines. The 3.2l FSI engine will be the next in line. Due to the commonalities between the 2.8l and 3.2l FSI engines, both units are described in this Self Study Programme. 2.8l FSI engine 411 001 3.2l FSI engine 411 123 Contents Specifications 6 Engine mechanicals Engine block . .8 Crank mechanism . 9 Crankcase ventilation system . .10 Crankcase air intake system .11 Cylinder head . .12 Audi valvelift system . .14 Chain drive . .23 Actuation of ancillary units . .25 Oil circulation system Lubrication system .28 Design . .30 Oil pump . .31 Oil level indicator .37 Cooling system Engine cooling system . .40 Air circulation system Overview . .45 T