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Gold/Mining/Energy : Big Dog's Boom Boom Room -- Ignore unavailable to you. Want to Upgrade?

To: E_K_S who wrote (192612)	9/19/2015 12:15:57 AM
From: Elroy Jetson	Read Replies (2) \| Respond to of 206326

In order to minimize carbon particulate emissions, Diesel engines are adjusted to run lean, as compared to a gasoline engine. Unfortunately, this increased percentage of air in the combustion chamber creates more NOx, especially in diesel engines which have higher operating pressures than a gasoline engine. This is the standard VW fails. From the info I've been able to pull up, it doesn't appear that California's NOx current standards 0.07 differ from national EPA standards, and doesn't differ by much from Europe's Euro-6 0.08 - nor does it seem they were different in 2009 when California and EPA were 0.3 when Europe Euro-5 was much lower at 0.18. Europe is now focusing more on reducing the microscopic carcinogens produced by diesel engines so their NOx emissions standard, which was lower than US standards, is now slightly higher than US standards, but still lower than the earlier EU standard. Reducing NOx emissions requires: 1.) limiting the Operating Pressure and Operating Temperature of the engine, which reduces the power and efficiency of diesel engines, and 2.) the addition of a CO(NH2)2 Urea catalyst to reduce the NOx to N2 and H2O. 3.) Sandia Labs has been working on lower-temperature diesel engines as an alternate way to solve this problem. - crf.sandia.gov I suspect all of these VW diesels use urea catalyst, as their competitors do, but it's clear the loss of power and efficiency imposed by option #1 above was implemented by VW only when the engine senses it's on a dynamometer. This was a very easy cheat to implement because driving on a test dynamometer is the only time that only two of the four wheels are in motion. But it's going to cost VW dearly.