General Induction Systems Basic
What is the purpose of the induction system?
To supply the engine with clean, properly metered air for combustion.
What type of induction system does a carbureted engine use?
Float-type carburetor system.
How does a fuel injection system differ from a carburetor?
Fuel is metered directly into intake ports or cylinders.
What is the purpose of a turbocharger?
To increase air density for more power.
What can cause a loss of manifold pressure?
Intake leaks or restrictions.
What components are typically included in an induction system?
Air filter, ducts, heat system, throttle body, intake manifold.
Where does fuel mix with air in a carbureted engine?
Inside the carburetor venturi.
Why are fuel injection systems less prone to icing?
No venturi to cause pressure drop/temperature drop.
What drives a turbocharger?
Exhaust gases.
What happens if an intake pipe leaks?
Lean mixture and rough operation.
Why must induction air be filtered?
To prevent foreign object damage and engine wear.
What creates the pressure drop in a carburetor?
Air accelerating through the venturi.
What is the function of the fuel control unit?
Meters fuel based on airflow and engine demand.
What is a supercharger?
A mechanically driven air compressor.
What is induction backfire?
Combustion in the intake system.
What is impact ice?
Ice forming on the air filter or intake from freezing moisture.
What are the two main types of carburetor ice?
Impact ice and fuel evaporation ice.
What is alternate air in a fuel-injected engine?
A backup unfiltered air source if the main intake is blocked.
What is manifold pressure?
Pressure inside the intake manifold.
What causes induction backfire?
Incorrect timing or lean mixture.
What is the primary danger of induction system icing?
Reduced airflow causing loss of power.
What is the purpose of carburetor heat?
To melt/prevent ice and provide alternate air.
What happens when alternate air is used?
Slight power loss due to warmer air.
What is the function of a wastegate?
Controls exhaust flow through the turbo.
How can air leaks be detected?
Visual inspection, spray test, or abnormal operation.