Regen Frequency - Page 10 - Dodge Cummins Diesel Forum
2013-2018 General Discussion General Chit Chat About the 2013 model year differences 6.7L 4th generation Cummins - NO ADVERTISING - Sponsored by: StarLite Diesel

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post #109 of 116 (permalink) Old 11-05-2019, 02:57 AM
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FWIW my truck doesnt regen either. I'm no mechanic but this is the way I figure it...

I seldom run unloaded and do 90% highway driving.
My post turbo EGT's pretty much stay between 800F to 900F.

It is my assumption that when the Cummins engine is run under the conditions that it was truly designed to operate under it runs clean enough (hot enough) to not need raw fuel dumped into the exhaust system (a regen) in an attempt to simulate proper EGT's to burn off soot, thus when properly loaded regens do not occur.

I monitor regen status and pre & post DPF temperatures with a CTS2 mounted on the console.
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post #110 of 116 (permalink) Old 11-05-2019, 11:06 AM
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6000 miles on mine, never had a regen to my knowledge.

2018 Ram 2500 Tradesman, CC/SB/4X4/CTD/68RFE, stock, white, no bells and whistles.
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post #111 of 116 (permalink) Old 11-05-2019, 11:29 AM
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These trucks do their regeneration process all the time, but they do not give any indication of it happening, except when the DPF gets close to full. Normal regeneration is how the system maintains the health of the DPF, and goes unseen, without notification.

And, there are two types of regeneration, active and passive. Active is when the ecm directs the system to inject extra fuel to greatly increase the ehat in the DPF to burn off the soot, passive is when normal operation raises the temp in the DPF to burn off the soot, this happens under heavy steady state work loads, like towing/hauling heavy at highway speeds for long distances.

So, just because you've never seen any message pop up, doesn't mean that regeneration hasn't happened, it's an ongoing process.
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post #112 of 116 (permalink) Old 11-05-2019, 12:22 PM
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Originally Posted by Ltngdrvr View Post
These trucks do their regeneration process all the time, but they do not give any indication of it happening, except when the DPF gets close to full. Normal regeneration is how the system maintains the health of the DPF, and goes unseen, without notification.

And, there are two types of regeneration, active and passive. Active is when the ecm directs the system to inject extra fuel to greatly increase the ehat in the DPF to burn off the soot, passive is when normal operation raises the temp in the DPF to burn off the soot, this happens under heavy steady state work loads, like towing/hauling heavy at highway speeds for long distances.

So, just because you've never seen any message pop up, doesn't mean that regeneration hasn't happened, it's an ongoing process.
I appreciate the education in the regen process. To clarify, I've never had an active regen due to the reasons you mentioned.

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post #113 of 116 (permalink) Old 11-06-2019, 02:04 AM
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To clarify, I've never had an active regen due to the reasons you mentioned.
Just curious but... How would you know if/when active regen occurs?

2016 Longhorn 3500 4x4 short-bed in Pearl White.
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post #114 of 116 (permalink) Old 11-06-2019, 10:30 AM
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Just curious but... How would you know if/when active regen occurs?
Isnt there an EVIC warning that says "drive normally at highway speeds for 45 miles" or something like that?

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post #115 of 116 (permalink) Old 11-06-2019, 10:33 AM
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Quote:
Originally Posted by Electrojake View Post
Just curious but... How would you know if/when active regen occurs? [IMG class=inlineimg]https://www.cumminsforum.com/forum/images/smilies/smilies-2008/confused013.gif[/IMG]
Isnt there an EVIC warning that says "drive normally at highway speeds for 45 miles" or something like that?
Not normally. Only if you’re driving style causes the DPF to get extremely full.
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post #116 of 116 (permalink) Old 11-06-2019, 10:47 AM
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The two signs I notice is engine makes a slightly different sound and the smell of the regen cycle. You may miss it if you travel a lot on the highway when it occurs, but you sure know it in the City when it does. Once you recognize it, you’ll know it.
The more highway miles, or constant rpm, or as some have suggested under load, the less it needs to regen.

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