The effects of the internal combustion engine on air quality have been an environmental concern for many years. The Environmental Protection Agency (EPA) raises the average fuel economy requirement yearly, and reduces allowable emissions every few years.
Emissions control efforts appear to be working. While the number of automobile registrations has risen sharply, fuel consumption has risen only slightly. Today, passenger vehicles account for less than 24 percent of smog in major cities, compared to 40 percent in 1970. These findings are more promising when we take into account that the number of miles driven per year has increased to 2 1/2 times the amount driven in 1970, and that light truck/SUV registrations have nearly doubled during the past 5 years.
It has been determined that half of all automobile pollution is generated by those 10 percent of the vehicles in the worst running condition. Modern emissions control standards ensure that today’s automobiles run cleaner, but today’s technicians ensure the percentage of gross polluters will continue to decline, ensuring that the quality of the environment will continue to increase in the future.
- Course Goals
- Exhaust Gas Components
- Operating Conditions and their Effect on Exhaust Gas Composition
- Methods of Reducing Emissions
- Reduction of Fuel Consumption
- Management of Fuel Vapor Losses
- Treatment of Exhaust Gases
- Performance Monitoring (On Board Diagnostics)
- Certification and Testing
- Federal Emissions Certification
- California Emissions Standards
- Regional Differences
- Emissions Inspection
Size: 2.54 Mb
Free download Audi Motor Vehicle Exhaust Emissions – SSP 943003