Reports

Light-Duty

• Refueling Vapor Recovery: A History of U.S. Experience with ORVR and Stage II (February 2020) (PDF 1.44 MB)
• A Statutory and Regulatory History of the U.S. Evaporative Requirements for Motor Vehicles and Analysis of European Evaporative Emission Requirements (February 2020) (PDF 1.08 MB)
• 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)

Heavy-Duty

• Technology Feasibility for Heavy-Duty Diesel Trucks in Achieving 90% Lower NOx Standards in 2027 (February 2020) (PDF 827 KB) / Report Fact Sheet (PDF 281 KB)/Chinese translation (PDF 1.24 MB)
• Characterization of Medium- and Heavy-Duty Vehicle Operations from In-Use Data: An Analysis of Starts, Soak Time, and Warm-Up Duration - MECA-funded report by NREL (November 2019) (PDF 5.8 MB)
• Technology Feasibility for Model Year 2024 Heavy-Duty Diesel Vehicles in Meeting Lower NOx Standards (June 2019) (PDF 784 KB)
• Emission Control Technologies for Diesel-Powered Vehicles (December 2007) (PDF 811 KB)

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)

Stationary Engines

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

Other

• Air Quality Benefits of a Future National Heavy-Duty Truck Standard (Project Summary) (PDF 315 KB)
  • Part 1: MOVES Inventory Modeling of a Potential Cleaner Trucks Initiative Scenario (June 2020) (PDF 2.8 MB)
    • Appendix A: National and State CTI Scenario 2035 Results Summary (xlsl 54 KB)
    • Appendix B: National and State Activity Summary  (xlsl 41 KB)
  • Part 2: Air Quality Model Analysis of a Cleaner Trucks Initiative Scenario (June 2020) (PDF 4 MB)
• NOx Emission Reduction Benefits of Future Potential U.S. Mobile Source Regulations (June 2018) (PDF 515 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)