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1.11 Fuel injection Flipbook PDF
1.11 Fuel injection
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PPL SYLLABUS II / AE 311
Aircraft General Knowledge & Instruments Air frame : Fuselage - Wing - Stabilizer Aircraft control system Loads Emergency equipment Landing gear Engines Engine cooling Engine lubrification Ignition system Carburation Fuel injection
PPL SYLLABUS II / AE 311
Fuel injection There are two main types of systems transferring fuel from fuel tanks to engine: • Gravity feed - suitable for high wing airplanes • Fuel pump supply - for low wings airplanes
Aircraft General Knowledge & Instruments
PPL SYLLABUS II / AE 311
Fuel injection: Gravity feed fuel system Simple and reliable system. Fuel is fed from both tanks: • Filler cap - for refueling • Drain plugs - to drain fuel and control fuel quality • Vent pipes – to equalize pressure inside tanks • Finger screen – low quality filter • Cut (shut) off valve – emergency valve to stop fuel flow • Strainer – fuel drain valve to control quality of fuel • Primer – pump to prime excess fuel to intake manifold • Carburetor – mixture control unit
Aircraft General Knowledge & Instruments
PPL SYLLABUS II / AE 311
Fuel injection: Pump feeding fuel system More sophisticated system and efficient system. Has additional components: • Fuel selector - allows to feed fuel from both, left or right tanks • Engine driven fuel pump - supplies fuel and creates pressure in fuel line • Aux (boost) fuel pump - additional electric fuel pump used in high engine power setting.
Aircraft General Knowledge & Instruments
PPL SYLLABUS II / AE 311
Fuel injection: Fuel tanks Tanks in light aircrafts are placed in wings, in torsion boxes. • Metal or plastic bags (caisson tanks) • See POH or aircraft flight manual (AFM) to calculate max distance range on max fuel. • Need to refuel after flight to prevent water condensation from air in tanks.
Aircraft General Knowledge & Instruments
PPL SYLLABUS II / AE 311
Fuel injection: Selector
Aircraft General Knowledge & Instruments
PPL SYLLABUS II / AE 311
Question At what power setting is serious carburettor icing likely to occur if operating at an ambient temperature of +10°C and a relative humidity of 50%? a) b) c) d)
Climb power Cruise power Take-off power Descent power
Aircraft General Knowledge & Instruments
PPL SYLLABUS II / AE 311
Question At what power setting is serious carburettor icing likely to occur if operating at an ambient temperature of +10°C and a relative humidity of 50%? a) b) c) d)
Climb power Cruise power Take-off power Descent power
Aircraft General Knowledge & Instruments
PPL SYLLABUS II / AE 311
Question What is the ideal fuel/air mixture ratio in a piston engine? a) b) c) d)
1:15 1:9 1:11 1:7
Aircraft General Knowledge & Instruments
PPL SYLLABUS II / AE 311
Question What is the ideal fuel/air mixture ratio in a piston engine? a) b) c) d)
1:15 1:9 1:11 1:7
Aircraft General Knowledge & Instruments