Report: Clean Diesel NOx Levels Exceed European, US Standards
Is clean diesel the cleanest diesel in the tub? Not as previously hoped, according to a new report.
According to Green Car Reports, the International Council on Clean Transportation says most clean-diesel vehicles actually emit higher levels of nitrous oxide than what both the Euro 6 and U.S. Tier 2, Bin 5 standards allow. In particular, the amount of NOx produced by said vehicles exceeds the limits set by the Euro 6 standard seven times over.
The cause? “Transient increases in engine load typical of everyday driving (e.g., going up a slight incline),” as well as “normal regeneration events in the normal diesel exhaust aftertreatment systems.”
The ICCT report — published last October — follows calls from environmental groups like Transport & Environment to bring test-cycle results in line with real-world driving conditions, such as the European Union’s plan to cast aside the New European Drive Cycle for the Worldwide Harmonized Light-Vehicle Test Procedures.
Seattle-based writer, blogger, and photographer for many a publication. Born in Louisville. Raised in Kansas. Where I lay my head is home.
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"diesel vehicles actually emit higher levels of nitrous oxide" Great info.....I suppose dentists and drag racers will be collecting diesel fumes now.
I would be interested in learning which vehicles do this, or if it's mostly all of them.
to my eye the title is also misleading. 'exceed ..... standards'. to me that means they are better than the standard. consider, oils that meet or exceed oem standard. if you want to indicate that the engines do not meet standards you have a few choices e.g. fail, fail to meet, do not meet, in excess of, etc. granted it requires more words but the titles to these info-articles do not seem to be word limited. carry on.
The one thing I have noticed running a "Bluetec" Mercedes in the shop is that it starts bothering people very quickly. If someone runs a gasoline engine in the shop, nobody even notices. If an old "dirty" diesel is run the the shop, it's just like running a kerosene space heater. I am expecting that at some point soon they will realize that although this new emissions technology helps with the emissions that are measured, there are other pollutants in the exhaust stream that cause issues.