Regen?
Thread Starter
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Senior User
Joined: Feb 2021
Posts: 103
Likes: 7
From: South Texas
Thanks , I’m in a Xl don’t have the fancy display. Mine shows a def ok and another one that’s a bar . But it also says def . I’m guessing that’s my dpf filter ?
Senior User
Joined: Aug 2017
Posts: 175
Likes: 6
From: Chicago Suburbs
No. DEF is the Diesel Exhaust Fluid. It is not related to regen of the DPF, Diesel Particulate Filter. Your DEF status is just how much fluid is in the tank. You'll use very little DEF unless the engine is under load.
2017 and up, Ford decided you don't need to know about the DPF and regen, which is mostly true. If you frequently drive 30+ mins (not idling stop light to stop light), tow or haul heavy loads, you probably don't need to think about the DPF. If you are just driving 5 mins to the office every day, you'll want to make sure regens are getting done.
2017 and up, Ford decided you don't need to know about the DPF and regen, which is mostly true. If you frequently drive 30+ mins (not idling stop light to stop light), tow or haul heavy loads, you probably don't need to think about the DPF. If you are just driving 5 mins to the office every day, you'll want to make sure regens are getting done.
Laughing Gas
Joined: Oct 2017
Posts: 787
Likes: 72
From: Lansing MI
Triggers:
Any one of the below:
500 miles since last regen.
DPF load at 100%.
Grams per Liter of soot reached 8.38. This does not display anywhere on the screens, but can be read with a code reader of system monitor. I use a Edge CTS2 to monitor such things.
When any one of these are meet, and as stated above, the engine is up to operating temperature, the regen will begin. During the regen, diesel is injected into the cylinders on the exhaust stroke, which then is burnt off in the exhaust. Exhaust temperatures can be seen to rise from a typical 600 at EGT1 (nearest the turbo) to 1200 during this process (I installed the monitor above to keep an eye on these). As the temperatures rises in the DPF, the trapped soot is combusted, and the DPF is cleaned. Think of this like a chimney fire, and there are some youtube videos that show this to dramatic effect.
Any one of the below:
500 miles since last regen.
DPF load at 100%.
Grams per Liter of soot reached 8.38. This does not display anywhere on the screens, but can be read with a code reader of system monitor. I use a Edge CTS2 to monitor such things.
When any one of these are meet, and as stated above, the engine is up to operating temperature, the regen will begin. During the regen, diesel is injected into the cylinders on the exhaust stroke, which then is burnt off in the exhaust. Exhaust temperatures can be seen to rise from a typical 600 at EGT1 (nearest the turbo) to 1200 during this process (I installed the monitor above to keep an eye on these). As the temperatures rises in the DPF, the trapped soot is combusted, and the DPF is cleaned. Think of this like a chimney fire, and there are some youtube videos that show this to dramatic effect.
Thread Starter
|
Senior User
Joined: Feb 2021
Posts: 103
Likes: 7
From: South Texas
No. DEF is the Diesel Exhaust Fluid. It is not related to regen of the DPF, Diesel Particulate Filter. Your DEF status is just how much fluid is in the tank. You'll use very little DEF unless the engine is under load.
2017 and up, Ford decided you don't need to know about the DPF and regen, which is mostly true. If you frequently drive 30+ mins (not idling stop light to stop light), tow or haul heavy loads, you probably don't need to think about the DPF. If you are just driving 5 mins to the office every day, you'll want to make sure regens are getting done.
2017 and up, Ford decided you don't need to know about the DPF and regen, which is mostly true. If you frequently drive 30+ mins (not idling stop light to stop light), tow or haul heavy loads, you probably don't need to think about the DPF. If you are just driving 5 mins to the office every day, you'll want to make sure regens are getting done.
Thread Starter
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Senior User
Joined: Feb 2021
Posts: 103
Likes: 7
From: South Texas
[QUOTE=harmanrk;19864308]Triggers:
Any one of the below:
500 miles since last regen.
DPF load at 100%.
Grams per Liter of soot reached 8.38. This does not display anywhere on the screens, but can be read with a code reader of system monitor. I use a Edge CTS2 to monitor such things.
When any one of these are meet, and as stated above, the engine is up to operating temperature, the regen will begin. During the regen, diesel is injected into the cylinders on the exhaust stroke, which then is burnt off in the exhaust. Exhaust temperatures can be seen to rise from a typical 600 at EGT1 (nearest the turbo) to 1200 during this process (I installed the monitor above to keep an eye on these). As the temperatures rises in the DPF, the trapped soot is combusted, and the DPF is cleaned. Think of this like a chimney fire, and there are some youtube videos that show this to dramatic effect.[/QUOTE
Thanks that helps a lot .
Any one of the below:
500 miles since last regen.
DPF load at 100%.
Grams per Liter of soot reached 8.38. This does not display anywhere on the screens, but can be read with a code reader of system monitor. I use a Edge CTS2 to monitor such things.
When any one of these are meet, and as stated above, the engine is up to operating temperature, the regen will begin. During the regen, diesel is injected into the cylinders on the exhaust stroke, which then is burnt off in the exhaust. Exhaust temperatures can be seen to rise from a typical 600 at EGT1 (nearest the turbo) to 1200 during this process (I installed the monitor above to keep an eye on these). As the temperatures rises in the DPF, the trapped soot is combusted, and the DPF is cleaned. Think of this like a chimney fire, and there are some youtube videos that show this to dramatic effect.[/QUOTE
Thanks that helps a lot .
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4wd Low
Joined: Jan 2018
Posts: 14
Likes: 7
It’s very irritating though when it’s in regen for 60-70 miles and all you see is your mpg going to crap! I still don’t understand why it needs to regen that long!
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Laughing Gas
Joined: Oct 2017
Posts: 787
Likes: 72
From: Lansing MI
The regen will turn off, when DPF load reached 15%, AND grams pre liter reach 1.00. I often find the grams pre liter is what keeps it going.
Thread Starter
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Senior User
Joined: Feb 2021
Posts: 103
Likes: 7
From: South Texas
Ok so on the way to work I didn’t get any faults . Now on my way home I got a check engine light. Ran my reader and this is what it was . So this whole time I was thinking it was a dpf issue and it’s a def injector issue . I thought it injected def to regen. I have an injector on order.
Lead Driver
Joined: Nov 2005
Posts: 5,213
Likes: 4,215
From: Kaysville Utah
The Emissions under your truck is made up of two parts. DPF ( Diesel Particulate Filter) and the SCR ( Selective Catalyst)
Regens take place in the DPF where soot is burned off. Extra diesel fuel in fed into your exhaust to create heat that burns off the soot
The SCR reduces the NOx that is created during High Combustion Temps.( ie when the truck is really working) The SCR is where the DEF is injected.
The DEF mixes with the Catalyst and neutralizes the NOx It has nothing to do with the Diesel Soot which the DPF takes care. DEF could be injected anytime you have high combustion temps and have no relationship to when Active Regen takes place. The SCR is basically a more robust method of reducing the NOx which on older trucks was handled with the EGR. The Exhaust Gas Recirculation recirculated spent exhaust into the combustion chamber to reduce the heat created during combustion. As clean air standards evolved. EGR's just were not getting rid of enough NOx and hence SCR were added to finish scrubbing the exhaust after it had left the combustion chamber
Two different emission system dealing with two different problems that are stack one behind the other.
Regens take place in the DPF where soot is burned off. Extra diesel fuel in fed into your exhaust to create heat that burns off the soot
The SCR reduces the NOx that is created during High Combustion Temps.( ie when the truck is really working) The SCR is where the DEF is injected.
The DEF mixes with the Catalyst and neutralizes the NOx It has nothing to do with the Diesel Soot which the DPF takes care. DEF could be injected anytime you have high combustion temps and have no relationship to when Active Regen takes place. The SCR is basically a more robust method of reducing the NOx which on older trucks was handled with the EGR. The Exhaust Gas Recirculation recirculated spent exhaust into the combustion chamber to reduce the heat created during combustion. As clean air standards evolved. EGR's just were not getting rid of enough NOx and hence SCR were added to finish scrubbing the exhaust after it had left the combustion chamber
Two different emission system dealing with two different problems that are stack one behind the other.
Laughing Gas
Joined: Jul 2020
Posts: 971
Likes: 454
How is your truck used? How much load? Longest I have seen mine go is 20 miles and usually it is 10.