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Originally Posted by AZCivic
What do you mean "the NOX problem is solved"? If it were solved, VW wouldn't be barred from selling TDI's in 10 states already for being unable to comply with NOX regulations.
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The problem is solved in the theortical sense but not necessarily implemented in current vehicles. The solution is fairly simple, recirculate some portion of the exhaust back into the intake. The reduced O(2) lowers the combusion temperature and solves the NO(X) problem.
Bob Wilson