Assuming this study used the same methodology, here is how cars are identified in remote sensing studies:How does this remote sensor know what kind of car it's looking at?
Great points wxman, thanks for 'clearing the air' on this topic that needs for education by the general public. In North America the '800 pound gorilla' are the millions and millions of gasoline cars averaging not better than mid to low 20s MPG and spewing lots of volatile organic compounds (VOCs) and other pollutants which combined are a much worse toxic formula than light duty diesel vehicles emit.A report released by CARB in 2016 ( "Measuring Real-World Emissions from the On-Road Passenger Fleet") used remote sensing to measure NOx emissions from traffic (in 2013 in West Los Angeles) similar to the True Initiative study.
CARB found that gasoline cars averaged 0.53 g NOx/kg fuel, while hybrids averaged 0.3 g NOx/kg fuel. VW diesel cars averaged ~18 g NOx/kg fuel, but BMW diesels averaged 0.4 g NOx/kg fuel.
BMW has been able to reduce exhaust NOx emissions to near hybrid levels for several years. Why diesel vehicles are having such a difficult time reducing NOx emissions in Europe seems rather strange.
By the way, more than just NOx emissions need to be measured. NOx is not the most problematic car emission from an ambient air pollution perspective.
Larger pickup trucks and vans have a less strict emission standard that LD vehicles.How do pickup trucks with 5.0 diesels get to sell them? They are surely not in complying with NOX regs???
Cummins actually knows a thing or two about after treatment solutions. For starters, the 5.0 Cummins drinks DEF like I drink my whiskey. The 6.7 Cummins uses zero EGR after warmup, but drinks DEF as if there's no tomorrow when towing. Other engines in the same class sip DEF, but experience a lot more DPF failures and sticking VGT turbos.How do pickup trucks with 5.0 diesels get to sell them? They are surely not in complying with NOX regs???
...When looking at Nitrogen Oxide (NOx) specifically, Emissions Analytics found average emissions were 48mg/km, meaning the cleanest diesels are getting close to the average NOx emissions from new petrol vehicles, which is 36mg/km....
The study claims that Euro 6 diesels in Europe do not meet the European emissions, but it did not test Euro 6d diesels which is what's referenced by wxman's recent post.Paywalls can often be bypassed by Googling the title of the article.
I'm guessing it just jumps you into the site beyond the paywall.
Paste the following with quotes into Google.. should work
"All new diesel cars fail EU emissions standards, says study"