Regeneration filter

Regeneration filter

This is a discussion on Regeneration filter within the RAM 1500 Diesel General Discussion forums, part of the RAM 1500 EcoDiesel Forum category; I live in a town of only about 7500 and a one way trip to almost anywhere in town is rarely more than a mile. ...

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    RAM Rookie sweetwaterguy's Avatar
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    Regeneration filter

    I live in a town of only about 7500 and a one way trip to almost anywhere in town is rarely more than a mile. It only took a 10 days if town driving following a 300 mile road trip for my exhaust filter indicator to tell me it was 90% full and needed to go back on the highway for regeneration. Is this normal, or is it an indication of a problem that I should discuss with the dealer?

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    Super Moderator OiLBrnR's Avatar
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    I would say that's about normal. The stock tune is pretty smokey, and the DPF will fill up quickly. Especially with cold starts until up to normal operating temperature. If you buy an aftermarket gauge, like an edge CTS, you can monitor the DPF soot load, and take it for a highway run once it reaches 65+% full.

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    Administrator 97hmcs's Avatar
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    Quote Originally Posted by sweetwaterguy View Post
    I live in a town of only about 7500 and a one way trip to almost anywhere in town is rarely more than a mile. It only took a 10 days if town driving following a 300 mile road trip for my exhaust filter indicator to tell me it was 90% full and needed to go back on the highway for regeneration. Is this normal, or is it an indication of a problem that I should discuss with the dealer?
    Here's some information that might be useful:

    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.
    hatchi12, roegs and CR4V3 like this.

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    RAM Rookie sweetwaterguy's Avatar
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    Thank you for the information. It was very helpful and enhanced my understanding of my new vehicle.
    97hmcs likes this.

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    Quote Originally Posted by sweetwaterguy View Post
    I live in a town of only about 7500 and a one way trip to almost anywhere in town is rarely more than a mile. It only took a 10 days if town driving following a 300 mile road trip for my exhaust filter indicator to tell me it was 90% full and needed to go back on the highway for regeneration. Is this normal, or is it an indication of a problem that I should discuss with the dealer?
    Your shot trips are not allowing your engine to heat up enough for a regeneration to start. My driving style is just a bit better with my trips averaging 6 miles round trip and one 25 mile round trip per week. That seems to be enough to get a regen going and I have not seen the regen message yet. I personally believe that the emission system is designed to operate under any conditions and it will tell you if it needs to run a bit. It would be nice if the manufacturers would at least mention the drawbacks of this emission system though. You may be a good candidate for the GDE tune. See other discussions regarding this...
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    RAM Rookie Jaxerson's Avatar
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    What is GDE tune?

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    Administrator 97hmcs's Avatar
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    Quote Originally Posted by Jaxerson View Post
    What is GDE tune?
    https://www.ram1500diesel.com/forum/g...roduction.html

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    I have 36402 miles and have not seen an active regen
    Gabe1986 likes this.

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    Administrator 97hmcs's Avatar
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    Quote Originally Posted by Tannerstap View Post
    I have 36402 miles and have not seen an active regen
    Here's some information that might be useful:

    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.
    Flmx81 likes this.

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