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DiagnostData AcademyFuel supply Fuel pressure control concept and injector of the 1.8 TFSI BYT engine Fuel pressure control concept and injector of the 1.8 TFSI BYT engine
How a short current pulse on the N276 regulator sets the delivery of the high-pressure pump over four phases of the piston stroke, and why a six-jet multi-hole injector is better than a swirl injector.
DiagnostData AcademyLubrication and cooling Coolant pump and electric pumps Coolant pump and electric pumps
How the coolant pump is designed and driven, how a switchable pump stops circulation with an annular shroud actuated by vacuum or hydraulics, and how electric pumps work and check themselves — with examples from different engines.
DiagnostData AcademyControl units and coding Power circuit management Power circuit management
How terminals S, 15, 50 and 75 are switched: an ignition lock with four switches or a start button, the “two out of three” rule for the terminal 15 relay, and starter operation — based on self-study program SSP 611.
DiagnostData AcademyTurbocharging Mechanical supercharger and twin-charging Mechanical supercharger and twin-charging
How a mechanical supercharger with two rotors is arranged, how it is better and worse than a turbocharger and how they work together with twin-charging: regulating flap, working zones by rotation, pressure sensors, noise — on examples of engines of 1.4 liters.

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