Induction Systems Flashcards
(28 cards)
How does induction icing affect engine performance
Reduced power and possible erratic operation
How is induction icing categorized
Impact, fuel evaporation , and throttle ice
What causes fuel evaporation ice
A decrease in air temperature
What is the common method used to prevent induction system ice in reciprocating engine
Raise the temperature of induction air
What may be the indication of leaking intake pipes
Engine runs rough at low r.p.m
What happens if carburetor heat is applied at high engine power settings
Detonation.
Is carburetor throttle ice more likely to occur at a higher or lower power setting? Why?
At a lower power setting because the throttle is partly closed, offering a larger surface area for ice accumulation
What could happen if the induction system becomes obstructed
Engine may not produce it’s rated power or it may not run at all. This may also mean that there is a dirty air inlet filter
What are two types of supercharged induction systems
Internally driven and externally driven
What is used to power a turbocharger
Engine exhaust gas directed onto the turbocharger turbine
What function does a turbocharger wast gate perform
Controls the amount of exhaust gas into or around the turbocharger
What could cause a turbocharged engine to surge
Wast gate or controller malfunction
Where are bellmouth inlet ducts typically found
On helicopter engines
What are the most common methods used for anti icing of turbine engine inlet ducts
Engine bleed air and electric heated elements
In a pressurized reciprocating aircraft what component in the turbocharger system is used to limit the amount of turbocharger airflow used for cabin pressurization
Sonic Venturi
What are the most common ways to control a waste gate
Mechanically with linkages to the throttle or a separate control, or by a actuator that is driven by oil pressure
What method is used to remove or prevent induction ice in a reciprocating engine
Heated air
How is some ice removed from aircraft induction systems if the carburetor heat is too low to clear the ice
Alcohol or Mersol, is sprayed into the induction system ahead of the carburetor.
What engine indication can be the result of a dirty air filter
Low power
What are two general classifications of superchargers used in reciprocating engine induction systems
internally driven or externally driven
What unit regulates the amount of exhaust gases to the turbine of a turbocharger
Waste gate
What type of power is used to control the position of the turbocharger waste gate on some engines
Oil pressure to an actuating piston
What can cause a waste gate to stick
carbon build up
What happens to the engine RPM when carburetor heat is applied
RPM drops