This has been mentioned here before and here it is again

Active = fuel is injected into the exhaust stroke strictly for the purpose of increasing exhaust gas temperatures (EGT's) in order to get to the temperature necessary to burn the soot out of the diesel particulate filter (DPF).

Your truck will regenerate (active) when the DPF soot level reaches 65%. This will likely occur every 100-300 miles. You will only see the notice on the EVIC if the soot level reaches 80-90% due to uncompleted regens.

Active self-regeneration occurs when there is not sufficient heat in the exhaust to convert all the carbon being collected in the DPF. Exhaust temperatures are raised by injecting a small amount of fuel upstream of the Diesel Particulate Filter.
The resulting chemical reaction over the DOC raises exhaust gas temperatures high enough to oxidize the carbon from the filter. This is all done without any operator intervention.

Passive = the engine is working hard enough under its own power that the EGT's are hot enough to keep the regeneration of the DPF in process, there is no extra fuel burned as it is not necessary.

Based on my observations, you will not see EGT’s hot enough for passive regeneration at unloaded highway speeds. The EGT’s are actually quite low when cruising on the highway unless you are towing a heavy load,are carrying a full payload, or driving hard.

From forum member Patty:

The truck's programming will make many repeated attempts to regenerate the DPF, from a high soot mass level of 65% down to <10% when a cycle is complete. If your trip is too short and the engine is then shut off, or the truck is put in park with the engine idling, an active regeneration process stops (at whatever soot level the DPF is at). The next drive cycle when the DPF again reaches 65% soot mass the whole process starts all over again. If you are going on a road trip the complete cycle will happen many times over...up to 65%...regen...down to <10%...over and over again.

 

This has been mentioned here before and here it is again Active = fuel is injected into the exhaust stroke strictly for the purpose of increasing exhaust gas temperatures (EGT's) in order to get to the temperature necessary to burn the soot out of the diesel particulate filter (DPF). Your truck will regenerate (active) when the DPF soot level reaches 65%. This will likely occur every 100-300 miles. You will only see the notice on the EVIC if the soot level reaches 80-90% due to uncompleted regens. Active self-regeneration occurs when there is not sufficient heat in the exhaust to convert all the carbon being collected in the DPF. Exhaust temperatures are raised by injecting a small amount of fuel upstream of the Diesel Particulate Filter. The resulting chemical reaction over the DOC raises exhaust gas temperatures high enough to oxidize the carbon from the filter. This is all done without any operator intervention. Passive = the engine is working hard enough under its own power that the EGT's are hot enough to keep the regeneration of the DPF in process, there is no extra fuel burned as it is not necessary. Based on my observations, you will not see EGT’s hot enough for passive regeneration at unloaded highway speeds. The EGT’s are actually quite low when cruising on the highway unless you are towing a heavy load,are carrying a full payload, or driving hard. From forum member Patty: The truck's programming will make many repeated attempts to regenerate the DPF, from a high soot mass level of 65% down to QUOTE] THANKS!

 

Thanks, man


Sent from my iPhone using Tapatalk

 

You're welcome.

 

In simple terms it reduces 90% of soot to less than 10% of ash by the process listed above

 

It's okay to drive while it's doing that?


Sent from my iPhone using Tapatalk

 

It's okay to drive while it's doing that?

Not only is it ok, it is required. This regen will not complete if you are not driving. In fact, the EVIC will tell you you need to drive at highway speeds to complete the process.

My '15 with ~5k miles just displayed this for the first time on Friday when my wife was doing some errands around town. I had her park it (she was done with her errands) and then I took it out the next day. The message came on again (indicating 90% full) and I got a chance to get it up to 50-65 range for a bit. The percentage dropped by 10% every couple of miles, and it indicated complete within about 15 minutes.

Kind of annoying, especially for her since she didn't know if the truck was broken, or something was wrong, or if she should keep driving it. I'm wondering if it never happened to me because I tend to drive with a bit of a heavier foot than she does, maybe triggering more passive regens than when my wife drives it.

 

I have a 2015 3.0 ecodiesel, been told it's the same engine as Ram 1500 diesel. 3 months ago I spent over $1000 at Ram dealership when my Regen filter was over 90% and it triggered some other problem with the injection system (if i remember correctly). The odd thing is, I was pulling a trailer, high load, high temp., when it happened. (In fact, my regen comes on regularly and I am on the freeway (65+ mph) 40 mins everyday.) 2 days ago my check engine light comes on; the Ram dealer says it's the thermostat not letting the engine get hot enough to burn off the soot regularly. Something sounds fishy since i've read the Regen burn is created by additional fuel released into/near the cat. converter (or whatever it's called on an ecodiesel).

 

Doesn't sound fishy to me. The ecm has to see predetermined conditions are met before initiating a regen.

 

THANK YOU!

 

Resurrecting a 2+ year old thread.