European Diesels

[Piwoslaw]

Originally Posted by 320touring

so whats the script with engine importing into the US?

I take it you can import engine types that were already for sale in the US? E.g the honda leanburn..

I guess you can import just about anything, as long as it passes emissions tests.

[Duffman]

Originally Posted by redpoint5

To the best of my research, both catalytic converters and particulate traps require ULSD. Urea reagents are often used in place of catalytic converters however.

Cats were used before summer 2006 when ULSD was phased in so no it is not required for cats. Urea is used to control NOx emissions which a diesel cat can not control because the diesels run lean unlike a gas engine. Diesel cats only control CO & HC, the DPFs go after soot or PM.

[rmay635703]

Originally Posted by redpoint5

To the best of my research, both catalytic converters and particulate traps require ULSD. Urea reagents are often used in place of catalytic converters however.

How is it that VW's tdi had a cat before ULSD was common and available then?