Exhaust Emission Control System: Operation: Notes
WARNING: This page is about a different car, the 2005 Hyundai Accent. However, it is still accessible from the selected car via links, so may be relevant.
Exhaust emissions (CO, HC, NOx) are controlled by a combination of engine modifications and the addition of special control components.
Modifications to the combustion chamber, intake manifold, camshaft and ignition system form the basic control system.
These items have been integrated into a highly effective system which controls exhaust emissions while maintaining good driveability and fuel economy.