Module 6 fuel injection Flashcards
Fuel injection systems
The RSA fuel injection system uses pressure from __________________for priming ?
Auxiliary airframe fuel pump
The Bendix fuel injection system use ___________to provide impact and venturi air to the fuel regulator
Venturi housing
Movement of the throttle valve in the RSA system causes a change in engine air consumption during the run, this results in?
Venturi and impact air to change, causing a change in the air metering force allowing for an increase in fuel flow
The 4 chambers in the Bendix fuel regulator are:
Impact air
Venturi air
Inlet fuel
metering fuel
The function of the ball valve in the RSA fuel regulator is to?
Create a pressure differential across the metering jet
What are the two valve in the Bendix fuel metering unit?
Idle valve and mixture valve
What are the two jets in the Bendix metering unit?
Main metering jet and Enrichment jet
What valve is use to increase the fuel flow without throttle input?
Idle valve
To reduce the pilot work load when leaning for altitude, some Bendix (RSA) systems have ?
AMC Automatic Mixture Control
The AMC control brass bellows are connected to a ____________and are filled with ______________
Reverse tapered needle
Helium
How does the AMC work?
The reverse tapered needle bleeds impact air to the venturi air partially closing the ball valve
At altitude if the AMC bellows ruptured the mixture would ?
Become rich
What is the purpose of the constant head idle spring ?
Provide for idle fuel flow
What is the purpose of the constant effort spring?
Provide a smooth transition between idle and cruise power
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
Flow divider
Pressure drop
What s the purpose of the RSA flow divider?
Evenly distribute the fuel to the cylinders
The RSA flow divider uses a _____ ______ and for positive fuel cutoff to the nozzles?
Poppet valve
springs
The RSA injector nozzles are installed in the _______ port of the cylinder?
Intake
The RSA fuel injection system is a continuous flow or direct injection system?
Continuous flow
The Specific fuel flow rate, within two percent is indicated on the fuel nozzles by ?
The letter on the fuel nozzles
A fuel nozzle that has a plugged air bleed would result in?
A rich mixture
The fuel pressure indication for a plugged air bleed will be
low fuel pressure
A clogged fuel nozzle will cause
A lean mixture for that cylinder and rich mixture for the remaining cylinder
The two field adjustments that can be made on the RSA system are
Idle speed and idle mixture
During Idle; you can tell if you have the correct mixture by?
Pulling the manual mixture control to the idle cutoff and watch for a 25 to 50 RPM rise
The fuel regulator houses_________and _______diaphragms?
Fuel
Air
The continental fuel injection systems is a:
continuous flow injection system
On a Continental system ,the fuel is injected:
Into the port of the cylinder
What are the advantage of a fuel injection system over the normal carburetor system?
- Less danger of induction system icing
- Improved fuel distribution for each cylinder
- The need of a separated priming system is eliminated
- Better acceleration
The Teledyne Continental Engine driven fuel pump (EDFP) is a:
Vane-type positive (constant) displacement pump
The relief valve of the EDFP returns the fuel to:
To the inlet side of the pump
What is the purpose of the bypass valve in the continental EDFP?
Allow fuel for purging priming, emergency
How does the electric auxiliary airframe pump deliver fuel to the engine for starting:
The check valve in the EDFP opens during starting for priming purposes
The purpose of the Vapour ejector is to?
Separate the fuel vapour, and return the vapour to the airframe fuel tank
The variable orifice fuel pump used on a turbocharged engine senses?
Upper deck pressure by the aneroid bellows
What is the purpose of the variable orifice fuel pump
Prevent an overly-rich mixture upon rapid acceleration
The mixture valve and the fuel metering valve(throttle valve) are housed in the ?
Fuel control unit
What is the purpose of the Fuel manifold valve(flow divider) in the Teledyne Continental fuel injection system?
Even distribute fuel for all the cylinders
The fuel manifold valve uses a _____ _____ and _____for positive fuel shutoff at idle cut off?
Poppet Valve
Spring
Where are the two screens in the Teledyne Continental fuel injection system?
In the fuel control unit and the fuel manifold
Continuous flow TMC fuel systems have the injector nozzle located:
Intake port of the cylinder
What does the letter on the fuel nozzle indicated?
The fuel flow
Can the nozzles of A,B or C be arbitrarily interchange?
No
How is fuel vaporization accomplished in the fuel injector nozzle?
Air bleed on the nozzles
If the fuel injector air bleed is plugged?
That injector will run rich
What is the indication that the injector nozzle discharge port is plugged?
Fuel stains are found on the cylinder head
The fuel pressure gauge on the TCM fuel injection systems takes its reading off the _______ _________ and is _________ _____ pressure
Manifold assembly
Metered fuel
What are the two field adjustment that can be made on the TCM fuel injection system?
Idle speed and Idle mixture
