induction and engine airflow systems Flashcards
what are the three units in a reciprocating engine induction system?
air scoop
carburetor
intake manifold
what is the effect on engine performance when induction systems icing occurs
engine power loss and erratic operation
what are the three classifications of induction system ice
I F T - Ice
impact ice
fuel evaporation ice
throttle ice
what is the common method used to prevent induction system ice in reciprocating engines
raising the temperature of induction air with a preheater
what causes fuel evaporation ice
Decrease air temp = evaporation fuel AFTER introduction in airstream
fuel evaporation ice is formed because decrease in air temperature resulting from evaporation of fuel after it is introduced into the airstream
when is carburetor throttle ice most likely to form due to throttle position
during part throttle operation when the throttle is in a party closed position
what are two types of supercharged induction systems?
internally driven and externally drive
what is the function of a sonic venture in a turbocharger system
to limit the amount of turbocharger airflow used for cabin pressurization
how and at what point does an internally driven supercharger boost air pressure
an impeller compresses the fuel/air mixture after it leaves the carburetor
from where does an externally driven supercharger drive its power
from the energy of engine exhaust gasses directed against some form of turbine
what is the function of a turbocharger waste gate
it controls the volume of exhaust gas that is directed onto the turbine
what may be an indication of a leaking intake pipe
the engine runs rough at low RPMs
what may be the indication of an induction system obstruction
the engine fails to start or power is low
what may be the indication if a turbocharger waste gate will not fully close
the aircraft may not be able to reach critical altitude
what could be the probable cause of a turbocharged engine that surges
waste gate or controller malfunction
