2018 eco diesel DPF 100% will not regen

[Witty270]

Have tried to get to regen and took to dealer they can't get it to regen what's the best way to clean the filter any help is appreciated thanks

 

[fmatiella]

Have tried to get to regen and took to dealer they can't get it to regen what's the best way to clean the filter any help is appreciated thanks

Have tried to get to regen and took to dealer they can't get it to regen what's the best way to clean the filter any help is appreciated thanks

Help me out guys. What is regen, what does it do, and what is it for?

 

[John Jensen]

Help me out guys. What is regen, what does it do, and what is it for?

Definitions
EGR
Exhaust Gas Re-circulation (EGR) is a nitrogen oxide (NOX ) emissions reduction technique used in gasoline and diesel engines. EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders.
DPF
Diesel Particulate Filter (DPF) is a device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine.
SCR
Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that injects DEF (Diesel Exhaust Fluid) through a special catalyst into the SCR of a diesel engine.
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EGT sensors:
EGT 1 is Pre-Turbo (EGT, located on the exhaust manifold collector
EGT 2 is DOC Inlet/Turbo Outlet (the most accurate turbo temp
EGT 3 is DPF Inlet (active regen)
EGT 4 is SCR Inlet (SCR\DEF Process – located mid SCR
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Active regeneration - is triggered when the DPF exhaust back-pressure reaches a certain back pressure point and is interpreted as 65-66% soot for the Ecodiesel. Then the ECU initiates a fuel injection designed to increase the exhaust temperature in the DPF to over 662 degrees F in order to oxidize the particulate deposits. When completed, the ECU assumes a small amount of residual soot and resets the value to 9%.
The Ecodiesel trigger point is 65% soot. (EGT3 sensor). An Ecodiesel will likely Regen every 100-300 miles.

Passive regeneration - occurs when the load and speed of the engine produce DPF exhaust temperatures greater than 662 degrees F, and it burns off the trapped DPF soot as the vehicle operates. Most Generally, the EGT’s do not get hot enough for a passive regen at unloaded speeds, thus, most trucks may never see a passive regen. However, when towing, carrying a full load, or driving hard the EGT’s can reach passive temps and perform a passive regeneration. (EGT3 sensor)

Selective Catalytic Reduction\DEF Process - When NOx reaches a certain level DEF is injected into the SCR (EGT4 sensor) to remove NO2/NOx. NOX levels trigger the DEF injection and also determines the quantity of DEF.