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Reciprocating Engine > Module 6 fuel injection > Flashcards

Module 6 fuel injection Flashcards

Fuel injection systems

1
Q

The RSA fuel injection system uses pressure from __________________for priming ?

A

Auxiliary airframe fuel pump

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2
Q

The Bendix fuel injection system use ___________to provide impact and venturi air to the fuel regulator

A

Venturi housing

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3
Q

Movement of the throttle valve in the RSA system causes a change in engine air consumption during the run, this results in?

A

Venturi and impact air to change, causing a change in the air metering force allowing for an increase in fuel flow

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4
Q

The 4 chambers in the Bendix fuel regulator are:

A

Impact air
Venturi air
Inlet fuel
metering fuel

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5
Q

The function of the ball valve in the RSA fuel regulator is to?

A

Create a pressure differential across the metering jet

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6
Q

What are the two valve in the Bendix fuel metering unit?

A

Idle valve and mixture valve

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7
Q

What are the two jets in the Bendix metering unit?

A

Main metering jet and Enrichment jet

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8
Q

What valve is use to increase the fuel flow without throttle input?

A

Idle valve

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9
Q

To reduce the pilot work load when leaning for altitude, some Bendix (RSA) systems have ?

A

AMC Automatic Mixture Control

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10
Q

The AMC control brass bellows are connected to a ____________and are filled with ______________

A

Reverse tapered needle

Helium

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11
Q

How does the AMC work?

A

The reverse tapered needle bleeds impact air to the venturi air partially closing the ball valve

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12
Q

At altitude if the AMC bellows ruptured the mixture would ?

A

Become rich

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13
Q

What is the purpose of the constant head idle spring ?

A

Provide for idle fuel flow

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14
Q

What is the purpose of the constant effort spring?

A

Provide a smooth transition between idle and cruise power

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15
Q

The fuel pressure gauge is used with a RSA fuel injection system is connected at the ___________and measures the ________ _______cause by the fuel flow through the nozzles

A

Flow divider

Pressure drop

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16
Q

What s the purpose of the RSA flow divider?

A

Evenly distribute the fuel to the cylinders

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17
Q

The RSA flow divider uses a _____ ______ and for positive fuel cutoff to the nozzles?

A

Poppet valve

springs

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18
Q

The RSA injector nozzles are installed in the _______ port of the cylinder?

A

Intake

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19
Q

The RSA fuel injection system is a continuous flow or direct injection system?

A

Continuous flow

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20
Q

The Specific fuel flow rate, within two percent is indicated on the fuel nozzles by ?

A

The letter on the fuel nozzles

21
Q

A fuel nozzle that has a plugged air bleed would result in?

A

A rich mixture

22
Q

The fuel pressure indication for a plugged air bleed will be

A

low fuel pressure

23
Q

A clogged fuel nozzle will cause

A

A lean mixture for that cylinder and rich mixture for the remaining cylinder

24
Q

The two field adjustments that can be made on the RSA system are

A

Idle speed and idle mixture

25
Q

During Idle; you can tell if you have the correct mixture by?

A

Pulling the manual mixture control to the idle cutoff and watch for a 25 to 50 RPM rise

26
Q

The fuel regulator houses_________and _______diaphragms?

A

Fuel

Air

27
Q

The continental fuel injection systems is a:

A

continuous flow injection system

28
Q

On a Continental system ,the fuel is injected:

A

Into the port of the cylinder

29
Q

What are the advantage of a fuel injection system over the normal carburetor system?

A
  • Less danger of induction system icing
  • Improved fuel distribution for each cylinder
  • The need of a separated priming system is eliminated
  • Better acceleration
30
Q

The Teledyne Continental Engine driven fuel pump (EDFP) is a:

A

Vane-type positive (constant) displacement pump

31
Q

The relief valve of the EDFP returns the fuel to:

A

To the inlet side of the pump

32
Q

What is the purpose of the bypass valve in the continental EDFP?

A

Allow fuel for purging priming, emergency

33
Q

How does the electric auxiliary airframe pump deliver fuel to the engine for starting:

A

The check valve in the EDFP opens during starting for priming purposes

34
Q

The purpose of the Vapour ejector is to?

A

Separate the fuel vapour, and return the vapour to the airframe fuel tank

35
Q

The variable orifice fuel pump used on a turbocharged engine senses?

A

Upper deck pressure by the aneroid bellows

36
Q

What is the purpose of the variable orifice fuel pump

A

Prevent an overly-rich mixture upon rapid acceleration

37
Q

The mixture valve and the fuel metering valve(throttle valve) are housed in the ?

A

Fuel control unit

38
Q

What is the purpose of the Fuel manifold valve(flow divider) in the Teledyne Continental fuel injection system?

A

Even distribute fuel for all the cylinders

39
Q

The fuel manifold valve uses a _____ _____ and _____for positive fuel shutoff at idle cut off?

A

Poppet Valve

Spring

40
Q

Where are the two screens in the Teledyne Continental fuel injection system?

A

In the fuel control unit and the fuel manifold

41
Q

Continuous flow TMC fuel systems have the injector nozzle located:

A

Intake port of the cylinder

42
Q

What does the letter on the fuel nozzle indicated?

A

The fuel flow

43
Q

Can the nozzles of A,B or C be arbitrarily interchange?

A

No

44
Q

How is fuel vaporization accomplished in the fuel injector nozzle?

A

Air bleed on the nozzles

45
Q

If the fuel injector air bleed is plugged?

A

That injector will run rich

46
Q

What is the indication that the injector nozzle discharge port is plugged?

A

Fuel stains are found on the cylinder head

47
Q

The fuel pressure gauge on the TCM fuel injection systems takes its reading off the _______ _________ and is _________ _____ pressure

A

Manifold assembly

Metered fuel

48
Q

What are the two field adjustment that can be made on the TCM fuel injection system?

A

Idle speed and Idle mixture

Reciprocating Engine (10 decks)

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