The FSI technology is all about maximising fuel economy through lean-burn combustion.
The TFSi doesn't implement stratified injection.
Got this from the Wikipedia page but also read the above post and link. Does nothing to clarify does it!
2.0 R4 16v TFSI 125-199kW[edit source | editbeta]
This turbocharged EA113 engine is based on the naturally aspirated 110kW 2.0 FSI.
identification
parts code prefix/variant: 06F.C, 06F.D
engine displacement & engine configuration
1,984 cubic centimetres (121.1 cu in) inline-four engine (R4/I4); bore x stroke: 82.5 by 92.8 millimetres (3.25 in × 3.65 in), stroke ratio: 0.89:1 - undersquare/long-stroke, 496.1 cc per cylinder, compression ratio: 10.5:1
cylinder block & crankcase
CG25 grey cast iron with liquid-blasted cylinder bore honing; 88 mm (3.46 in) cylinder spacing, five main bearings, die-forged steel crankshaft, two simplex-roller chain driven balance shafts
cylinder head & valvetrain
cast aluminium alloy; modified inlet duct geometry for high tumble values providing superior knock resistance, four valves per cylinder (exhaust valves sodium filled for increased cooling), 16 valves total, low-friction roller finger cam followers with automatic hydraulic valve clearance compensation, belt and roller-chain driven double overhead camshaft (DOHC), continuous intake camshaft adjustment (42° variance from crankshaft)
aspiration
hot-film air mass meter incorporated into air filter housing, cast alloy throttle body with electronically controlled 'drive by wire' throttle butterfly valve, plastic variable length controlled intake manifold with charge movement flaps adjusted by a continuous-action pilot motor, 0.9 bars (13.1 psi) boost water-cooled BorgWarner K03 turbocharger (K04 on 169 kW upwards) incorporated in exhaust manifold, sandwiched central front-mounted intercooler (FMIC)
fuel system
fully demand-controlled and returnless; - fuel tank–mounted low-pressure fuel pump,
Fuel Stratified Injection (FSI): inlet camshaft double-cam driven Hitachi single-piston high-pressure injection pump maintaining a pressure between 30 to 110 bars (440 to 1,600 psi) in the stainless steel common rail fuel rail, four combustion chamber sited direct injection sequential solenoid-controlled fuel injectors, air-guided combustion process, multi-pulse injection with homogeneous mixing, stratified lean-burn operation with excess air at part load
