Blue-Tec Discussion

[hwebster]

Okay, the new rig is in the yard and I'm starting to get familiar with all the bells and whistles. After driving thru Calgary last week and seeing a huge black haze hanging over the city, I am very pleased to have the clean diesel engine. That said, I haven't found one place here for the discussion of the pros/cons/issues and maintenance of the emissions systems on the 7.5+ 6.7L Cummins.

I'd like to use this thread as a starting point for that discussion.

So -

1 - I believe the Cummins does not use urea injection. Instead a catalytic converter is used for the NOX scrubbing.

2 - The DPF is a ceramic device that cleans particles from the exhaust gases. Cummins states that the filter needs to be cleaned or replaced @ 200,000 miles or so.

3 - The regen process is accomplished by adding fuel to the exhaust and burning the accumulated material leaving ash that is blown out.

4 - There have been some issues reported with this. Your experience with the technology could well be governed by the type of load you have on the engine. I.E. Loaded/Highway driving with higher EGT will enable the system to run cleaner and reduce the frequency of regens.


Thats the limit of my understanding at this time. I've read the Cummins brochure, referenced in another thread, but would like to see one place for discussions on Blue Tec.

Comments/Suggestions? Thanks H