You are reading a single comment by @gbj_tester and its replies.
Click here to read the full conversation.
-
The SCR process involves the injection of urea into the exhaust pipe.
https://en.wikipedia.org/wiki/Diesel_exhaust_fluid
Coming soon to a car near you, as some manufacturers will be using SCR to get small diesels to pass Euro 6 tests. If it's working properly, you shouldn't get significant amounts of ammonia in the tail pipe, so stinky buses are likely to be suffering from a defective sensor somewhere.
1 Attachment
-
gbj_tester
lynx
^^
https://www.tfl.gov.uk/info-for/media/press-releases/2014/july/world-s-largest-bus-retrofit-programme-compjeted
"
The SCR process involves the injection of urea into the exhaust pipe. The urea decomposes and hydrolyses to ammonia (NH3) which reacts with NOx and reduces it to harmless nitrogen and water
"