Light-duty vehicles
US EPA revised fuel economy standards for MY 2023 – 2026
The US EPA has revised the fuel economy standards for model years 2023 – 2026. On average, this will require fleet averaged annual reductions of CO2 or fuel consumption by 7%. Overall, the model year 2026 CO2 emissions will be further reduced by 23% compared to the previous Safer Affordable Fuel-Efficient (SAFE) rule.
Do we need reductions in tailpipe particulate emissions, given that cars will be electric ?
A simple calculation, taking the US as an example, to show that improving air quality for the next couple of decades will require that we continue to improve IC engines, even as electrification proceeds rapidly.
Environmental Justice – PM2.5 disproportionately affects people of color in the US
If you have not heard of the term “Environmental Justice” or “EJ” as it is abbreviated, then it’s time to read up. Policy makers have to pay close attention to this topic in the quest for a rapid transition to greener energy and mobility.
California Clean Cars 2.0 : Emission standards beyond 2025
California Clean Cars 2.0 : Emission standards beyond 2025 Based on workshops held by California’s Air Resource Board (CARB) Background
Euro 7 Implications for gasoline particulate filters
GPFs work well under wide operating conditions. But, very higher filtration will be needed for Euro 7. Journal Paper Review : Particle
How is the vehicle fuel economy (mpg) measured in the US ?
How is vehicle fuel economy (mpg) measured in the US ? Ever wonder how those city / highway MPG (miles
Heavy-duty vehicles
Overview of California’s Advanced Clean Fleets proposed regulation
California’s Advanced Clean Trucks regulation requires an increasing portion of heavy-duty (HD) vehicle sales to be zero emitting, starting 2024. However, a mandate on selling electric trucks will work only if there is a market for these vehicles. That’s the idea behind the Advanced Clean Fleets regulation. Read here for the current elements being considered.
California’s Heavy-Duty Low NOx Omnibus Regulation
California’s Air Resource Board (CARB) has passed what could be perhaps it’s last major regulation for reducing NOx and particulates from heavy-duty trucks and buses. The HD Low NOx “Omnibus” regulation practically touches upon every aspect of in-use emission reduction. Highlights summarized here.
