Category: Mobile Source Emissions Current & Ongoing Studies

Reducing automobile emissions has been a central component of the state’s plans to improve air quality. The start cycle of vehicles is known to have increased emissions of hydrocarbons (HC) and carbon monoxide (CO) because the engine uses an enriched fuel mixture to avoid misfires due to condensation on the cylinder walls. The following studies quantify the impact of different vehicle starting methods at low temperatures on Utah’s wintertime air quality.

Current & Ongoing Studies

Car Exhaust Photo from Unsplash Matt Boitor

Ammonia Emission Assessment from Diesel and Gasoline Engines under Utah Specific Conditions

To better understand the contribution of automobiles to Utah ammonia emissions, tailpipe ammonia (NH3) measurements will be taken in laboratory and on-road settings for an array of diesel and gasoline vehicles representative of Utah’s vehicle fleet.

  • Principal Investigators: Randal S. Martin (USU), Joe Thomas (UDAQ), John Sohl (WSU)
  • Funded for: $59,958
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