"Danny D." writes:

On Mon, 21 Sep 2015 17:30:19 -0700, Danny D. wrote:

This article says the whole TDI Clean Diesel campaign is a fraud.
I don't drive a diesel.

What was the "TDI Clean Diesel" campaign anyway?

Oopops. Forgot to include the url:
http://www.popularmechanics.com/cars...l-controversy/

What was this "TDI Clean Diesel" campaign anyway?
And, what does that have to do with "urea" injection?

How does this UREA injection work?

It's in the article:

All the other carmakers control diesel emissions by spraying a urea
solution into the exhaust stream, where a catalyst converts it to
ammonia. The ammonia breaks down NOx into nitrogen and water.

--
Dan Espen