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Equipment
January 20, 2023 2:06 PM, EST

Timeline: Emission Changes Since 2000

  • 2002: Most diesel engine makers introduced exhaust gas recirculation, or EGR, as part of a consent decree with EPA to meet 2004 NOx standards early. (Cummins)
  • 2007: Engine manufacturers added diesel particulate filters, or DPFs, to meet EPA's more stringent particulate matter emission standards. (Bloomberg News)
  • 2010: Most diesel engine manufacturers introduced selective catalytic reduction, or SCR, in 2010 to meet tighter NOx emission limits. (John Sommers II for Transport Topics)
  • 2014: Greenhouse gas emissions and fuel economy standards for heavy-duty trucks and engines go into effect under EPA and NHTSA's Phase 1 GHG rule. (Allika/Getty Images)
  • 2021: Increasingly stringent greenhouse gas emissions and fuel economy standards for heavy-duty trucks and engines go into effect under EPA and NHTSA's Phase 2 GHG rule. (David Paul Morris/Bloomberg News)
  • 2024: CARB's Advanced Clean Trucks rule is scheduled to begin requiring truck makers to transition an increasing percentage of their trucks sold in California to zero-emission vehicles. CARB also is developing its Advanced Clean Fleets rule, which would require motor carriers operating in the state to begin shifting toward zero-emission trucks. (Qilai Shen/Bloomberg News)
  • 2027: Tighter NOx emission standards for heavy-duty trucks and engines go into effect under EPA's Clean Trucks Plan. CARB, meanwhile, is seeking a waiver from EPA to finalize its own regulation to further reduce NOx emissions for trucks operating in the state. EPA also plans to introduce Phase 3 greenhouse gas standards. (Midnight Studios/Getty Images)
  • 2002: Most diesel engine makers introduced exhaust gas recirculation, or EGR, as part of a consent decree with EPA to meet 2004 NOx standards early. (Cummins)
  • 2007: Engine manufacturers added diesel particulate filters, or DPFs, to meet EPA's more stringent particulate matter emission standards. (Bloomberg News)
  • 2010: Most diesel engine manufacturers introduced selective catalytic reduction, or SCR, in 2010 to meet tighter NOx emission limits. (John Sommers II for Transport Topics)
  • 2014: Greenhouse gas emissions and fuel economy standards for heavy-duty trucks and engines go into effect under EPA and NHTSA's Phase 1 GHG rule. (Allika/Getty Images)
  • 2021: Increasingly stringent greenhouse gas emissions and fuel economy standards for heavy-duty trucks and engines go into effect under EPA and NHTSA's Phase 2 GHG rule. (David Paul Morris/Bloomberg News)
  • 2024: CARB's Advanced Clean Trucks rule is scheduled to begin requiring truck makers to transition an increasing percentage of their trucks sold in California to zero-emission vehicles. CARB also is developing its Advanced Clean Fleets rule, which would require motor carriers operating in the state to begin shifting toward zero-emission trucks. (Qilai Shen/Bloomberg News)
  • 2027: Tighter NOx emission standards for heavy-duty trucks and engines go into effect under EPA's Clean Trucks Plan. CARB, meanwhile, is seeking a waiver from EPA to finalize its own regulation to further reduce NOx emissions for trucks operating in the state. EPA also plans to introduce Phase 3 greenhouse gas standards. (Midnight Studios/Getty Images)

A timeline of landmark emission changes for U.S. heavy-duty trucks and engines since 2000. 

 

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emissions, Regulations, Deep Dive, heavy-duty
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