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279 Service. The 2.0 l 110 kW engine with petrol direct injection FSI Self Study Programme 279 For internal use only Improved methods of injecting petrol into the Thrifty diesel engines employ direct injection, intake port represent more or less the limit of in other words, the amount of fuel supplied what can be done to optimise economy with corresponds exactly to the requirements at conventional techniques. The direct injection any given time. principle opens up new possible ways of creating more economical and environmentally sound petrol engines. The logical next step at least in theory would therefore be to apply the principle of direct injection to petrol engines as well. FSI technology from Audi opens up a whole new dimension for the petrol engine. Contents Page Introduction Highlights of the FSI engine 4 2.0 l FSI engine . 5 Engine Crankcase breather . 6 Pistons . 7 Oil circulation 7 Cylinder head 8 Camshaft positioning 11 Lower part of intake manifold . 12 Intake air routing 13 System components . .14 CAN bus interfaces 16 Engine control unit 17 Modes of operation 17 Stratified charge operation . 18 Homogeneous operation . 20 Fuel system 24 Single plunger high pressure pump 26 Fuel metering valve N290 28 Fuel rail 29 Fuel pressure sender G247 . 30 High pressure injectors N30, N31, N32, N33 . 31 Exhaust system . 32 Exhaust gas temperature sender G235 . 32 Exhaust gas treatment system . 33 NO storage catalytic converter 33 x Regeneration phases 34 NO sender G295 . 36 x Exhaust gas temperature sender G235 . 36 Exhaust gas recirculation . 37 Block diagram 38 Special tools 40 The Self Study Programme contains information on design New Attention features and functions. Note The Self Study Programme is not intended as a Workshop Manual. Values given are only intended to help explain the subject matter and relate to the software version applic