Intake Air System

INTAKE AIR SYSTEM

Overview

NOTE: For illustrations of intake air system components, refer to the Fuel Delivery and Air Induction, Intake Air Distribution and Filtering.

The intake air system provides clean air to the engine, optimizes air flow, and reduces unwanted induction noise. The intake air system consists of an air cleaner assembly, resonator assemblies, hydrocarbon filter and hoses. The hydrocarbon filter trap helps reduce emissions by preventing fuel vapor from escaping into the atmosphere from the intake when the engine is off. It is typically located inside the air intake system. The main component of the intake air system is the air cleaner assembly. The air cleaner assembly houses the air cleaner element that removes potential engine contaminants, particularly abrasives. The mass air flow (MAF) sensor is attached externally to the air cleaner assembly and measures the quantity of air delivered to the engine combustion chamber. The MAF sensor can be replaced as an individual component. The intake air system also contains a intake air temperature (IAT) sensor, which is integrated with the MAF sensor. For additional information, refer to Engine Control Components. The air induction resonator is a part of the intake air housing. The function of a resonator is to reduce induction noise. The air induction components are connected to each other and to the electronic throttle body assembly with hoses. Engine Control Components

The overall quantity of air metered to the engine is controlled by the torque-based electronic throttle control (ETC) system.

For additional information, refer to Torque-Based Electronic Throttle Control (ETC). Description and Operation