ENGINE INDUCTION SYSTEMS Flashcards
What are the three major parts of a reciprocating engine induction system?
The airscoop and ducting, the carburetor, and the intake manifold
What effect does induction system icing have on engine performance?
Induction system icing can cause an engine to act erratically and lose power.
What method is used to prevent or remove induction system ice in a reciprocating engine?
The most common method of preventing or removing ice formation in the induction system is
by the use of heated air.
How is ice cleared in some aircraft induction systems if the carburetor heat is too low to clear the ice?
A fluid such as alcohol, anilol, or mersol is sprayed into the induction system ahead of the
carburetor. The fluid will dislodge the ice which is ingested by the engine.
What engine indication can be the result of a dirty air filter?
Low power
What is the danger of using carburetor heat when operating at high power settings?
The higher air temperatures could cause detonation and possible engine failure
Carburetor throttle ice is most likely to form when the throttle is in which position?
During part throttle operation when the throttle is near the closed position
What are two general classifications of superchargers used in reciprocating engine induction systems?
They are classified as internally driven or externally driven (turbocharger) supercharger
systems.
What is the purpose of a distribution impeller in a supercharger?
It is designed to break up the fuel globules into finer particles for better distribution to the
cylinders.
How does an internally driven supercharger boost air pressure?
A high-speed impeller is driven through a gear train from the crankshaft at a gear ratio that
varies from 6:1 to 12:1.
Where does an externally driven supercharger get its power?
The exhaust gases are directed against a turbine. For this reason, they are commonly called
turbochargers.
What unit regulates the amount of exhaust gases to the turbine of a turbocharger?
The 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.
