Air Injection Systems: 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 gases. This results in reduced levels of carbon monoxide and hydrocarbon emissions. The 2.6L engine uses a Pulse Air Feeder (PAF) system to supply this additional air, while 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 injection systems consist of a belt driven air pump, a combination diverter-pressure relief valve, a switching valve, hoses and check valves to protect the hoses and other components from hot gases, and injection tubes.