secondary air - in some exhaust emission control systems, e.g. thermal reactor or two-bed converter, secondary (outside) air is added to the exhaust to ensure sufficient supply of oxygen to promote oxidation of HC and CO, thus converting these pollutants into harmless water vapour and carbon dioxide
Miscellaneous features:
- exhaust gas recirculation
- water injection/emulsion
- secondary air injection
- charge cooling system
A catalyst provided by AlliedSignal, Inc., and a secondary air-injection system designed by the UIC team were keys to reducing emissions. The catalyst reduces all three components of emissions - hydrocarbons, carbon monoxide and oxides of nitrogen. The secondary air-injection system picks up unburned raw fuel that remains in the exhaust stream after combustion, reducing hydrocarbon emissions.
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