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Old 21st July 2020, 10:33   #1
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Default FAQs about DPF (Diesel Particulate Filter)

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Originally Posted by sv97 View Post
How long does the ad blue last in seltos and after how many kilometers it requires DPF regeneration?
Can the respective owners please reply.
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Old 21st July 2020, 10:46   #2
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Default Re: Kia Seltos : Official Review

Seltos doesn't use adblue, just the DPF. Engines having 2L and above like Harrier are using adblue
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Old 21st July 2020, 10:46   #3
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Default Re: Kia Seltos : Official Review

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Originally Posted by sv97 View Post
Can the respective owners please reply.
Not an owner but replying to the best of information that I know. Seltos uses a DPF to meet BS VI standards, no AdBlue is used. Larger displacement engines will need the AdBlue to be added.

Last edited by a4anurag : 21st July 2020 at 11:01. Reason: Corrected: Lean NOx trap > DPF
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Old 21st July 2020, 10:46   #4
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Default Re: Kia Seltos : Official Review

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Seltos doesn't use adblue, just the DPF. Engines having 2L and above like Harrier are using adblue
What happens in case the DPF gets clogged?
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Old 21st July 2020, 10:49   #5
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Default Re: Kia Seltos : Official Review

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Originally Posted by sv97 View Post
What happens in case the DPF gets clogged?
It throws a warning light on the instrument console. You regenerate the DPF by letting the car do it on its own or take the car on a highway and drive it at say 3,000 RPM for a short duration. The heat generated in the exhaust system will free the DPF and the warning light should go away.

Last edited by a4anurag : 21st July 2020 at 10:51.
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Old 21st July 2020, 10:51   #6
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Default Re: Kia Seltos : Official Review

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Originally Posted by a4anurag View Post
It throws a warning light on the instrument console. You either regenerate the DPF by letting the car do it on it's own or take the car on a highway and drive it at say 3,000 RPM for a short duration. The heat generated will free the DPF and the warning light should go away.
Sorry for posting so many questions but how does it happen on its own?
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Old 21st July 2020, 10:58   #7
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Default Re: Kia Seltos : Official Review

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Originally Posted by sv97 View Post
What happens in case the DPF gets clogged?
Please refer the link to my earlier post on the subject in this thread itself.

https://www.team-bhp.com/forum/offic...ml#post4771540 (Kia Seltos : Official Review)
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Old 21st July 2020, 11:00   #8
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Default Re: Kia Seltos : Official Review

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Originally Posted by sv97 View Post
Sorry for posting so many questions but how does it happen on its own?
Here's the information from the owner's manual:

FAQs about DPF (Diesel Particulate Filter)-screenshot_20200721105646.jpg

FAQs about DPF (Diesel Particulate Filter)-screenshot_20200721105544.jpg
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Old 21st July 2020, 11:00   #9
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Default Re: Kia Seltos : Official Review

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Originally Posted by a4anurag View Post
It throws a warning light on the instrument console. You either regenerate the DPF by letting the car do it on it's own or take the car on a highway and drive it at say 3,000 RPM for a short duration. The heat generated will free the DPF and the warning light should go away.
There is no DPF when there is a LNT.

For those who have posted earlier, please note that Adblue is a proprietary name just like using Xerox instead of photostat - the right term is DEF or Diesel Exhaust Fluid.

LNT's can be regenerated when the warning light comes on by subjecting it to a fairly high speed run - it needs to heat up to remove the Sulphur deposits. Each regeneration reduces its life.

LNT's are not as effective as DPF's in removing pollutants and remains to be seen whether they will survive the increasingly stricter emission norms.
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Old 21st July 2020, 11:03   #10
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Default Re: Kia Seltos : Official Review

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Originally Posted by AMG Power View Post
There is no DPF when there is a LNT.
Thank you sir for correcting me. Apologies for posting incorrect information. Corrected my original post.

DPF is preferred for engines with smaller displacement I presume.
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Old 21st July 2020, 11:25   #11
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Default Re: Kia Seltos : Official Review

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Originally Posted by a4anurag View Post
Thank you sir for correcting me. Apologies for posting incorrect information. Corrected my original post.

DPF is preferred for engines with smaller displacement I presume.
No issues.

DPF is required in larger displacement engines where the quantum of pollutants released is higher.
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Old 21st July 2020, 11:28   #12
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Default Re: Kia Seltos : Official Review

Quote:
Originally Posted by AMG Power View Post
There is no DPF when there is a LNT.
Quote:
Originally Posted by a4anurag View Post
DPF is preferred for engines with smaller displacement I presume.
A possibly naive query from me then -

DPF = Diesel Particulate Filter. As the name suggests, its job is to block the "particulate matter" i.e. CARBON SOOT from getting launched into the air from the exhaust. (Which used to be the tell-tale sign black smoke of a diesel engine since decades in India.)

LNT = Lean NOx Trap. This is supposed to absorb the NOx (NO and NO2) from the exhaust fumes.

So how can LNT actually replace DPF altogether? Shouldn't the two work in tandem to achieve the final result of a cleaner exhaust?

Quote:
Originally Posted by AMG Power View Post
No issues.
DPF is required in larger displacement engines where the quantum of pollutants released is higher.
IIRC - the humble 1.5 TDCi from Ford needs a DPF even to be BSIV compliant.

Last edited by Reinhard : 21st July 2020 at 11:35.
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Old 21st July 2020, 11:37   #13
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Default Re: Kia Seltos : Official Review

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Originally Posted by Reinhard View Post
A possibly naive query from me then -

DPF = Diesel Particulate Filter. As the name suggests, its job is to block the "particulate matter" i.e. CARBON SOOT from getting launched into the air from the exhaust. (Which used to be the tell-tale sign of a diesel engine since decades in India.)

LNT = Lean NOx Trap. This is supposed to absorb the NOx (NO and NO2) from the exhaust fumes.

So how can LNT actually replace DPF altogether? Shouldn't the two work in tandem to achieve the final result of a cleaner exhaust?


IIRC - the humble 1.5 TDCi from Ford needs a DPF even to be BSIV compliant.
I would like to add SCR too to the discussion.

DPF - for smaller displacement engines like 1.3, 1.5 L etc.
SCR - for higher displacement generally > 2.0 L.

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FAQs about DPF (Diesel Particulate Filter)-scrgraphicv3nocaption_website_opt.jpg

Sometimes SCR is coupled with DPF too to achieve even greater emission controls in heavy duty trucks etc. More on the links below.

http://www.hartridge.com/blog/3-diff...nd-scr-filters

https://www.dieselforum.org/about-cl...el/what-is-scr


Last edited by Bibendum90949 : 21st July 2020 at 11:49.
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Old 23rd July 2020, 14:27   #14
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Default Re: FAQs about DPF (Diesel Particulate Filter)

FAQs about DPF (Diesel Particulate Filter) - Posts moved to a new thread.
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Old 23rd July 2020, 17:08   #15
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Default Re: Kia Seltos : Official Review

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Originally Posted by Reinhard View Post
A possibly naive query from me then
LNT is used in place of a SCR and not DPF as mentioned. However while SCR's need a reductant - Diesel exhaust fluid - that some folks call Adblue, the LNT does not need that. A few manufacturers use an LNT and a SCR.


Quote:
Originally Posted by Reinhard View Post
IIRC - the humble 1.5 TDCi from Ford needs a DPF even to be BSIV compliant.
The 1.5 TDCI uses a DPF only in the BSVI version launched this year. DPF is used in engines that are >1500.
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