Air Injection Reaction Systems
AIR systems are designed to reduce HC and CO emissions from the tailpipe. A pump forces fresh air (oxygen) into the exhaust manifold where the combustion process can continue to burn any remaining raw fuel. Check valves are used to prevent exhaust gasses from entering the pump and a diverter or by-pass valve is used to direct the airflow from the exhaust manifolds during deceleration to the atmosphere or into the engines intake system. One of the early computer controlled engine management designs directed the air into the middle of the catalytic converter after the system enters closed loop operation. This system supplies the extra oxygen needed to reduce HC and CO in the oxidation section of the converter.
Air Pumps
Diverter Valves
By-Pass Valves
Exhaust Check Valves
Air Pumps are rotary vane designs and are non-serviceable. The pumps are belt driven and draw filtered air through the air filter assembly or through a dedicated filter. The air is pumped into the exhaust manifolds at about 5 psi. We do not offer air pumps in the line. Diverter Valves direct the air flow to the atmosphere during periods of deceleration. During deceleration the fuel mixture is on the rich side and if excess oxygen were present in the exhaust system a backfire would occur damaging the exhaust system. By-Pass Valves serve the same function as diverter valves but, they can also divert the pressurized air into the intake system of the engine or into a dual bed catalytic converter. These combination valves can be vacuum or electrically controlled. Check Valves are mounted at the distribution pipes and prevent exhaust gasses from entering the air delivery hoses. Exhaust gasses would destroy the air pump and burn out the hoses and lines.
Air Distribution Pipes
A.I.R. Distribution Pipes direct the air leaving the pump check valves into the exhaust manifold. The pipes use nozzles that screw into the exhaust manifold. The nozzles are positioned directly across from the exhaust valve of each cylinder. This positioning directs the fresh air directly into the rich fuel mixture leaving the cylinder so any excess fuel will be burned.