Fuel Injection

Question 1

What are some advantages of fuel injection

Answer 1

Better control of fuel economy and fuel evaporation
Evenly distributes fuel
Eliminating carburetor ice

Question 2

What are the two types of fuel injection

Answer 2

Direct injection

Continuous-flow

Question 3

What are the two types of continuous flow fuel injection systems

Answer 3

Precision air motive

Teledyne-continental

Question 4

What’s the components of the rsa injection systems

Answer 4

Venturi housing
Fuel metering unit
Fuel regulator
Flow divider and fuel nozzels

Question 5

How does the idle valve operate based off the throttle valve

Answer 5

It is linked to the throttle valve allowing the idle valve to open at the same time as the throttle valve

Question 6

What is used in the fuel metering unit in the Mixture control valve to control flow

Answer 6

Valve plate

Question 7

How does a fuel regulator regulate fuel

Answer 7

Uses the air by the air metering unit and the fuel metering force developed by the ball valve allowing the scheduling flow of fuel

Question 8

What components are key when opening the fuel regulator system and can become cracked of flawed

Answer 8

Diaphragms

Question 9

The fuel required for idling is supplied by what

Answer 9

The constant head idle spring or C.H.I.S

Question 10

What is used to smoothly transfer from idle speeds to cruise speeds

Answer 10

Constant effort spring

Question 11

What is the key component in the automatic mixture control

Answer 11

Bellows

Question 12

How does a automatic mixture control work

Answer 12

It controls based of the pressure difference across the air diaphragms

Question 13

Where is a flow divider is located

Answer 13

Usually located on the top of the engine

Question 14

What type of tubing is used on flow dividers tubing

Answer 14

Stainless stell

Question 15

What type of measurement does the instrument go by

Answer 15

It reads in gallons per hour

Question 16

Where are the fuel nozzles located on an aircraft

Answer 16

They are threaded into each cylinder

Question 17

Fuel nozzles can also be classified as

Answer 17

Air bleed type nozzles

Question 18

How can u identify fuel nozzles

Answer 18

A stamped letter on the nozzle body

Question 19

How is the idle speed get adjusted

Answer 19

By an idle speed screw

Question 20

Teledyne continental injection system use what type of metering force

Answer 20

Fuel metering

Question 21

What are the basic components to the teledyne continental injection system

Answer 21

Engine driven pump
Fuel/air control unit
Fuel manifold valve
Injector nozzles

Question 22

How does the air get out of the fuel in the injector pump

Answer 22

By swirling the air

Question 23

What is the components in the fuel- air control unit

Answer 23

Mixture control
Main metering jet
Throttle valve

Question 24

What does the direct link between the fuel and throttle mixture allow for

Answer 24

Proportional increase/ decrease of fuel to the manifold valve

Question 25

What is the component that helps with the dispersement of fuel to the cylinders

Answer 25

The manifold valve

Question 26

Why is the vent never pointed tword the front of the engine

Answer 26

If it was the air pressure would be to great and no fuel would be allowed into the cylinders

Question 27

What components make up the manifold valve

Answer 27

``` Diaphragm Screen Calibrated spring Fuel inlet Outlet to nozzles Cut off valve Poppet valve ```

Question 28

What are mechanics limited to when working on rsa or teledyne continental injection systems

Answer 28

Cleaning nozzles Field adjustments Low fuel pressure High fuel pressure

Question 29

How do you clean injector nozzles

Answer 29

By soaking them in a suitable solvent and inspecting for clogged orifices

Question 30

What are the things that need to be inspected for fuel systems

Answer 30

``` Exterior fuel leaks Fuel pressure checks and adjustments Identical fuel flow across nozzles Engine control travels Idle speed and mixture ```

Question 31

What are the two air metering forces on a pressure carburetor

Answer 31

Venturi pressure | Impact air

Question 32

Where is fuel held constant pressure on a pressure carburetor

Answer 32

The discharge valve

Question 33

Jet A-1 is a what type fuel

Answer 33

High grade kerosene

Question 34

Jet B is what type of fuel

Answer 34

Kerosene/Gasoline Mixture

Question 35

What is the anti-microbial and anti freeze

Answer 35

Prist

Question 36

How does the FCU schedules fuel

Answer 36

Based off adding/ removing heat energy

Question 37

What is the perfect air-fuel mixture

Answer 37

15:1

Question 38

Fuel is mixed with approximately what percent of the total primary air

Answer 38

25%

Question 39

What does the FCU control

Answer 39

Acceleration and Deceleration rates

Question 40

What does the FCU monitor

Answer 40

``` Power Lever position Inlet air temperature and/ or pressure Compressor speed Burner air pressure Turbine inlet temp ```

Question 41

What are the different type of fuel control units

Answer 41

Hydro mechanical | Hydro pneumatic

Question 42

What are the types of electronic engine controls

Answer 42

Supervisory Electronic Engine Control | Full authority digital engine control

Question 43

Describe how hydro mechanical connection helps piolets

Answer 43

The operator had a direct connection to the FCU

Question 44

How is the power lever control the fuel flow on a turbine engine

Answer 44

The power lever is connected to the speeder spring

Question 45

How does the engine flyweights operate on the FCU

Answer 45

It senses the engine speed and then helps by regulating fuel and the weights will either go in or out based on speed

Question 46

What is the three types of speeds the fly weights can be at

Answer 46

Under speed On speed Over speed

Question 47

What are used to control acceleration and deceleration in a hydro mechanical FCU

Answer 47

Differential relief valve | Burner pressure sensor

Question 48

What are the differences of a hydro pneumatic system

Answer 48

Utilizes the air pressure sensing system.

Question 49

How does it work with the propeller

Answer 49

They are interconnected to the engine and FCU control unit

Question 50

What are the two types of electronic engine control systems

Answer 50

Supervisory EEC | Full authority digital engine control

Question 51

What system is on the hydro mechanical system

Answer 51

Supervisory EEC

Question 52

How does the supervisory EEC

Answer 52

They sense based off engine operating parameters and schedules. It compensates for variation in flight conditions to reduce pilot workload. Prevents engine exceedances.

Question 53

What does the basic fuel injection fuel system include

Answer 53

``` Fuel storage tanks Shut off and selector valves Boost/auxiliary pumps and engine driven pumps Filters/ screens and low point drains Fuel heat exchangers ```

Question 54

What are the two types of fuel nozzles In fuel injection

Answer 54

Vaporizing | Atomizing

Question 55

How does the fire light in all canisters

Answer 55

It lights by a flame propaganda tubing

Question 56

How does atomizing fuel nozzles work

Answer 56

Utilize high pressure fuel and specifically sized discharge orifices to produce the spray patter

Question 57

What are the two types of atomizing fuel nozzles

Answer 57

Simplex | Duplex

Question 58

How does duplex fuel injectors work

Answer 58

By having a primary and secondary fuel inlet and the primary is for starting and secondary is for above Cruising idle speed

Question 59

What does the pressurization and dump valve work

Answer 59

Supply fuel to manifold and nozzles at the correct pressure for starting and running spray patterns Dump the fuel from the nozzles and manifold to aid in rapid engine shut down and to prevent fuel from evaporating in a hot combustion chamber