Emission Controls

The Driving Force u Tighter limits on emissions are the main driving force of emission controls u The government is making them do it u The government had no limits on vehicle pollution until the Clean Air Act took effect in the late 1960’s

Air is made up of : u 21%O2 u 78%N u 1% other gasses (mostly argon)

Fuel is primarily made up of : u Hydrocarbons (HC)

Perfect combustion u HC, O2, N2 in u Heat, H2O, CO2 and N2 out

Imperfect combustion u Adds HC, CO, NOx and O2 to exhaust

Smog, what is it? u Ground level ozone - O3 u Three ingredients; HC, NOx and sunlight u CO is a pollutant all by itself

State emissions testing u Attainment areas vs. non-attainment areas –Ozone and/or CO u Centralized vs. non-centralized testing

Remote sensing devices u Similar to photo radar u Used in California / Colorado

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