Latest California section 177 states – ZEVs, LEVs and ICE bans
Around 40% of the US now follows California’s tougher-than-federal criteria pollutant standards. Here’s a summary of the latest, including followers of the Advanced Clean Cars rule.
All eyes on the Euro 7 proposal
Here’s a summary of possible changes to emission standards for passenger cars being considered as part of Euro 7.
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 California has the world’s toughest gas emissions standards for light-duty vehicles. The standards phase-in to 30 mg/mi of combined non-methane organic gases (NMOG) and nitrogen oxides (NOx) by 2025. CARB is now considering tightening these […]
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 Number Emissions of a Euro 6d-Temp Gasoline Vehicle under Extreme Temperatures and Driving Conditions https://www.mdpi.com/2073-4344/11/5/607 Background Tailpipe particle number (PN) measurements were done on a Euro 6d-temp vehicle with a close-coupled TWC and uncoated […]
How is the vehicle fuel economy (mpg) measured in the US ?
How is vehicle fuel economy (mpg) measured in the US ? The US EPA requires vehicle fuel consumption to be measured using lab chassis dynamometer testing. A representative vehicle is run over five test cycles, listed below along with the respective ambient temperatures: FTP-75 at 75 F: Represents city driving. Includes 3 measurements called bags […]