Quote:
Originally Posted by ForcedInduction
Its really an embarrassment to MB and anyone that buys a vehicle with it. It says "We can't make a clean engine so we will put a bunch of junk in the exhaust to make it look clean." Same goes with catalytic converters and particulate (soot) traps.
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Why is this an embarrassment? I am not too enlightened in the field of diesel engine combustion theory, but I keep thinking thinking maybe there's an inherent design problem with these engines that never really can be overcome, and thus they require some sort of cleaning of the exhaust.
I understand that PM is created by pyrolysis, increasing the injection pressure might help that but it's already been done to a great extent as I understand. Maybe superheating the fuel before injection could produce more complete oxidation?
And for that pesky NOx problem.. it forms in high temperatures and that's a bit harder to solve..