Reports

Light-Duty

• Comparison of On-Vehicle and Service Station Technologies to Control Vehicle Refueling Emissions in Brazil (August 2017) (PDF 227 KB)
• Rationale for Including ORVR as a Component within China V to Stabilize and Reduce the Rapidly Increasing VOC Inventory Caused by Evaporative Emissions (February 2015) (PDF 628 KB)
• LEV III and Tier 3 Exhaust Emission Control Technologies for Light-Duty Gasoline Vehicles (February 2015) (PDF 721 KB)
• Aftermarket Converter Technology for Gasoline Light-Duty Vehicles (November 2014) (PDF 593 KB)
• Emission Control of Two- and Three-Wheel Vehicles (September 2014) (PDF 304 KB)
• Reducing Evaporative Emissions - The Largest Source of VOC Emissions Leading to Haze, PM2.5 and Ozone Formation in China's Major Cities: A Macro and Micro Analysis with Information on International Experience and Related Implications for China (June 2014) (PDF 2.6 MB) / Chinese translation (PDF 2.2 MB)
• Evaporative Emission Control Technologies for Gasoline Powered Vehicles (December 2010) (PDF 740 KB)
• Tier 2/LEV II Emission Control Technologies for Light-Duty Gasoline Vehicles (June 2007) (PDF 472 KB)
• MECA Demonstration Program of Advanced Emission Control Systems for Light-Duty Vehicles (May 1999) (PDF 150KB)

Heavy-Duty

• Emission Control Technologies for Diesel-Powered Vehicles (December 2007) (PDF 811 KB)
• Catalyst-Based Diesel Particulate Filters and NOx Adsorbers: A Summary of the Technologies and the Effects of Fuel Sulfur (August 2000) (PDF 388KB)
• Demonstration of Advanced Emission Control Technologies Enabling Diesel-Powered Heavy-Duty Engines to Achieve Low Emission Levels (June 1999) (PDF 352KB)

Off-Road

• Emission Control of Small Spark-Ignited Off-Road Engines and Equipment (January 2009) (PDF 432 KB)

Efficiency Technologies

• Mobile Source Technologies to Reduce Greenhouse Gas Emissions (April 2009) (PDF 190 KB)

Fuels

• The Impact of Gasoline Fuel Sulfur on Catalytic Emission Control Systems (June 2013) (PDF 542 KB)
• Impacts of MMT Use in Unleaded Gasoline on Engines, Emission Control Systems, and Emissions - Sierra Research (August 2008) (PDF 13.1 MB)
• The Case for Banning Lead in Gasoline (January 2003) (PDF 495 KB)

Stationary Engines

• Emission Control Technology for Stationary Internal Combustion Engines (May 2015) (PDF 263 KB)

Other

• NOx Emission Reduction Benefits of Future Potential U.S. Mobile Source Regulations (June 2018) (PDF xxx KB)
• Health Effects of Particulate Air Pollution (October 14, 2014) (PDF 426 KB)
• Ultrafine Particulate Matter and the Benefits of Reducing Particle Numbers in the United States (July 2013) (PDF 2.3 MB) / Executive Summary (Mandarin translation) (PDF 152 KB)