Light-Duty Vehicle Emissions
Office of Automotive Engineering

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image of vehicle in test cell

LD chassis dynamometer with 48" roll.

The light-duty vehicle emissions activity at Southwest Research Institute (SwRI) focuses on research and development of exhaust emissions from passenger cars and light trucks, specifically as affected by conventional fuel composition, or the replacement of conventional fuels by alternative fuels such as natural gas, LPG, and alcohols. In addition, detailed exhaust characterization such as hydrocarbon speciation, measurement of air toxics, and sampling and analysis of particulate matter are conducted. Test cycles include those required by the Environmental Protection Agency (EPA) and California Air Resources Board (CARB), as well as the ECE and Japan. Off-cycle conditions (hard accelerations, high power absorption, and others) are also run, and test temperatures can be controlled from 20 to 120 °F (-12 to 49 °C).

Light-Duty Vehicle Emissions Technical Strengths

  • Off-cycle test conditions and temperatures
  • Speciation and toxics
  • Periodic testing during mileage accumulation
  • Analytical procedure development
  • Studies in diesel fuel property effects
  • Studies in gasoline fuel property effects
  • Lubricant property effects related to fuel economy and emissions
  • Fuel and fuel additive registration evaluations

Other Services Offered by Light-Duty Vehicle Emissions

  • Environmental technology verifications (ETV)
  • Spark and compression ignition engine fuel and additive effects
  • Emissions at high and low temperatures
  • Unregulated pollutant speciation
  • Alternative and flexible fuel vehicle research
  • Statistical analysis

Related Terminology

light-duty vehicle emissions  •  LD vehicle emissions  •  emissions  •  exhaust emissions  •  exhaust characterization  •  particulate matter  •  hydrocarbon speciation  •  speciation  •  unregulated pollutant  •  air toxics  •  toxics  •  fuel additive   •  registration  •  environmental technology verifications (ETV)  •  additive effects  •  off-cycle conditions  •  mileage accumulation   •  fuel economy

Benefiting government, industry and the public through innovative science and technology
Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 9 technical divisions.