Quote:
Originally Posted by hal9999
Question for ConnClark:
If it’s true what you say about the ultra fine particulates, can you quantify how much of these are produced by a DPF in comparison to a non-filtered vehicle? More, same, less ?
I would appreciate a scientific document (please no biased WebPages or forums).
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http://www.jchbkj.cn/zl/Diesel%20Par...%20Filters.pdf
DPFs make sense for long haul trucks and locomotives where engine duty cycle remains high for an extended period of time. For cars that take short trips they do not make sense because they don't get up to temp long enough to clean themselves.
As engine efficiency rises PM will fall because PM is unutilized fuel.
IMHO environmental agencies should just set standards to meet. They should be forbidden from dictating how they are met such as mandating DPF and catalysts.