Regen?

[Shelby Griggs]

There has been some concern by off road users of starting the world on fire during a regen cycle. I thought I read someplace that regen wouldn't occur below a certain road speed? I do go off road some in my line of work and regen would not be good in those cases!



Just wondering if there is supposed to be a lock out at slow speeds, typically what you would be doing in a field, etc. ? Not saying it actually works that way due to buggy software, etc. , but I wonder if that was even thought of by the engineers? What really needs to happen is a manual lockout, with a limp mode if you leave it that way too long to force compliance, yet not set the world on fire when out in our field, etc. That probably won't happen because there is too much trying to protect ourselves from ourselves anymore, if ask me! I got no problem with a clean exhaust, I do have a problem with torching a field or a forest!



SHG

 

[HBarlow]

SHG,



I don't think regen is prevented below a certain speed although it seems like a good idea.



The only way I can tell that my truck is in the "regen" mode is on three occasions I've noticed a different sound at idle and looked up at the EGT gauge and observed an EGT or 800* or 1000* at idle while stopped at a traffic light.



I assume the high EGT is due to being in regen mode but haven't seen any lights in the dash or overhead computer confirming the regen mode.

 

[Texas Ted]

SHG

I have never seen my truck run the regen cycle while stopped. My pyro tells me that when regen is occuring and I lift my foot off the throttle regen immediately stops. I think the concern of starting a fire is valid when you pull from the highway to a stop on a dry grassy area while the regen cycle is occuring. The cycle will end as you slow the truck but the residual heat in the system may start a fire. [tall grass]



I have never seen my truck regenerating at a stop sign, only under load and at speed. The pyro will spike up to 1100 deg at that time and the exhaust system generates a great deal of heat.

Ted

 

[HBarlow]

Regeneration indicated by high EGT continues at idle in my truck with my foot off the accelerator pedal.

 

[Shelby Griggs]

I wonder if there is a difference between the pickups and the C&C?



SHG

 

[HBarlow]

Yes, there are differences but I don't know what they are.



I know that the engine computer software is different between the two engines... the pickup produces higher hp and torque. The lower, slower rising boost and egt can be seen on my gauges comparing to my memory of my two previous Cummins engines.



I understand the diesel particulate filter is different as well. There are probably other hardware and software differences that I don't know about.



Maybe one of the Dodge trained techs who are TDR members can shed light on the question.