Cummins X15 after treatment issues

[Rawze]

(05-07-2024 )Envirotec Wrote:  

(05-07-2024 )Rawze Wrote:  ...
Here is a video that shows how DOC/DPF cleaning should be done ....
info: http://rawze.com/forums/showthread.php?t...5#pid50975

Side note we do not have doser injectors. Not sure how different the newer X15s are compared to the ISX's from 10 years ago.
...

you are correct that many of the newer x15's do not not have a dedicated Doser injector ... because the fuel is instead dumped directly into the exhaust system by way of the injectors in the cylinders during an exhaust stroke. This method of dumping fuel in the exhaust directly is referred to as 'In Cylinder Dosing'.

MEANING IT IS STILL THE SAME REGENERATION PROCESS as other older engines with DPF filters .. using fuel in the exhaust system to raise the temperatures and do a burn-off.

Also... if you did not know this... the vehicvles regeneration system will only ever clean those cans about 5% or so at best. It is not capable at all of making the filters100% clean again.. it does not matter how many times you do a forced or parked regen. The cans need to be removed and professionally cleaned by the OEM every few years at most if you want them to stay healthy long term.

This means that by the time the regen lights are plaguing the truck, .. its far too late, and engine + its emissions systems have been neglected for far too long. Meaning that everything in the EGR systems on the engine is past due for tune-up work to reduce excessive soot production, + now having to remove and have professionally cleaned, the DPF/DOC etc. - It all has to come apart and be cleaned out, serviced, + the cans baked-out, software maintenance done to go with it, etc.etc.etc.

.. and as a fleet owner, or small fleet owner ... ALL of this tune-up work + bake, etc.. should be done every year on each truck, on a schedule, to prevent down time .. BEFORE ALL THE LIGHTS START TO PLAGUE THEM!!!.

HOW DO YOU THINK the mega-fleets deal with it?... they have their own in-house mechanics that service all these things annually for each truck, to prevent any of this unnecessary emissions systems down time that can mostly be prevented when things are done right.

This is the world of modern trucking ... where preventative maintenance is a MUST AND HAS TO BE DONE on a schedule to prevent all the headaches you are now facing ... and you + your mechanic SHOULD BE TRAINED AS SUCH TO KEEP AFTER IT!. Otherwise, waiting until all of it plagues you and the CEL lights are on with endless complaints is the worst, and most costly decision you can make!.


Owning a truck should NEVER EVER be about waiting until the check engine light comes on.. it should be about preventative care (the stuff beyond a damn oil change), first and foremost. .. yet everyone seems to have forgotten how to do this until its far too late\ ... then blame it all on the equipment.

Being VERY pro-active with the emissions and EGR systems maintenance on a regular schedule is the most profitable thing you can do with modern equipment. Anything less and its nothing but endless headaches.

There are also things that can help though too ... like having programming set to be more lenient, to remove most of the derates and shut-downs, without eliminating anything, so that when one does act up, you can at least get it back back to your own shop, instead of having to tow it to a stealers$it that is going to do nothing but throw expensive parts at it. The only down side to this is that an abusive driver may drive it against an actually clogged up DPF for many weeks at a time, .. eventually tearing up the engine.