Air Injection System: Description

The air injection system adds a controlled amount of fresh air to the exhaust gases, at the exhaust manifold or downstream, to aid in complete oxidation of the exhaust gases. This results in reduced levels of carbon monoxide (CO) and hydrocarbon (HC) emissions.

The 2.6L engine uses a pulse air feeder (PAF) system to supply this additional air. All other engines use an air pump air injection system.

The Pulse air feeder system consists of a main-reed valve and a sub-reed valve, within the pulse air feeder, to control air flow.

Air pump air injection systems consist of a belt driven air pump, a switching/relief valve, hoses, and check valves to protect the hoses and other components from hot gases in the injection tubes.