Fuel Injection Systems + Pressure Carbs Flashcards
Advantages of fuel injection systems over predecessors:
1) Better control of fuel economy and vaporization.
2) Evenly distributes fuel.
3) Eliminates carburetor icing.
Basic methods of fuel injection:
1) Direct injection
2) Continuous-Flow Injection
The most commonly used type of fuel injection system:
Continuous-flow injection.
______ fuel injection systems spray high pressure fuel into the cylinder itself.
Direct.
______ fuel injection systems premix the fuel and air in the intake port on each cylinder.
Continuous-flow
Two types of continuous flow injection systems:
1) Precision Airmotive RSA
2) Teledyne-Continental System
The basic components of an RSA injection system:
1) Venturi housing
2) Fuel Metering Unit
3) Fuel Regulator
4) Fuel Divider & Nozzles
The throttle lever in the cockpit controls what two valves of a RSA fuel injection system?
1) Throttle valve
2) Fuel metering idle valve
The RSA fuel metering unit includes what two valves?
1) Mixture control valve
2) Idle valve
Which valve includes the enrichment metering jet in a RSA fuel metering unit?
Idle valve
The three settings of the RSA mixture control valve:
1) Idle cutoff
2) Lean
3) Full Rich
The three settings of the RSA idle valve:
1) Idle power
2) Cruise power
3) Full power
The amount of fuel allowed through the idle and mixture control valves of an RSA fuel metering unit depends on the position of their ______ ______.
Valve plates
The RSA fuel regulator uses the ____________ and the ____________ to schedule fuel to the engine.
1) Air metering force
2) Fuel metering force
The air metering force is developed by the __________.
Venturi housing.
The Fuel metering force in an RSA fuel regulator is developed by the _______ and ________.
Ball valve.
Fuel metering unit.
T/F
Fuel required for idling is supplied by the constant effort spring in the fuel regulator.
False
Constant Head Idle Spring
In an RSA fuel regulator, the ____________ is used to smooth the transition between idle and cruise power.
Constant effort spring.
The constant effort spring is used to provide a smooth transition between ______ and ______ power.
Idle.
Cruise.
Metered fuel is distributed to each cylinder from the ________.
Fuel divider (RSA)
Fuel manifold valve (Teledyne)
Fuel flow to the cylinders is measured in ________.
Gallons per hour.
The stamped letter on the nozzle body references _________.
Metering orifice diameter.
T/F
The air metering force of a Teledyne Continental injection system is used with the fuel metering force to schedule fuel to the engine.
False.
Teledyne Continental injection systems use fuel metering force only
Basic components of a Teledyne Continental injection system:
1) Engine driven pump
2) Fuel/air control unit
3) Fuel manifold valve
4) Injector nozzles
The functions of the Manifold valve:
1) Even fuel distribution to cylinders.
2) Provides positive fuel shutoff.
3) Is a point for fuel flow readings to be taken.