Air Induction System

PURPOSE
The Air Induction System provides a closed pathway to route outside air through the Air Filter and Intake Manifold and finally, into the engine. A throttle valve is used to regulate the amount of air that enters the engine, there-by regulating the engine speed.

OPERATION
Air is filtered through the air cleaner and the amount flowing to the air intake chamber is determined according to the throttle valve opening in the throttle body and the engine speed (RPM).
Intake air controlled by the Throttle Valve opening is distributed from the air intake chamber to the manifold of each cylinder and is drawn into the combustion chamber.
At low temperatures the Idle Air Control (IAC) valve opens and air flows through the IAC valve and the throttle body, into the air intake chamber. During engine warming up, even if the Throttle Valve is completely closed, air flows through the IAC valve to the air intake chamber, thereby increasing the idle speed (first idle operation).
The air intake chamber prevents pressure fluctuations (pulsation) of the intake air flow.