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DPF regen, questions?
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 
DPF regen, questions?

I don't want this to divert from the diesel diluting oil thread but, as DPF is new(ish) to me, questions.

What speed do I have to drive at to guarantee "forced" DPF regeneration? I've seen 2,500 revs mentioned, that would be about 90mph in 6th, 80 odd in 5th or 70 in 4thin a six speeder.

No way am I risking my license at 90 so even at 70, how long do I need to hold 4th? 20 minutes?

Isn't the DPF meant to automatically regenerate? Would a 20 mile blast up to 70 - 75mph at the end of a 550 mile haul mean it's regenerated at the end of said blast?

I've had the car for 12k miles, I'm assuming it has regenerated several times, how often would it do it on a long haul at my normal long haul cruising speed, 60mph? I can't remember noticing it regerating, it must be subtle if it does.

Questions, questions. Whistle
   
Post #184632811th Aug 2017 3:03 pm
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10463

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Here's an answer:-

http://www.disco3.co.uk/forum/topic104237.html

Thumbs Up

NJSS
 Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t. 
 
Post #184633111th Aug 2017 3:24 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

Cheers, lots of techie stuff to read. Thumbs Up Thumbs Up
   
Post #184633311th Aug 2017 3:28 pm
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robpenrose
 


Member Since: 12 Jan 2016
Location: Surrey / SW London
Posts: 2136

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

I would make sure your secondary turbo is getting a regular work out too
 

Current: D4 HSE
Previous: BMW Z4M Coupe
Previous: Land Rover Defender 90 CSW Td5
Previous: Land Rover Discovery Td5 ES 
 
Post #184633411th Aug 2017 3:30 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

Will give that a little rooster booster next time out. There are some pretty steep hills around here where I can get a bit of speed up. Thumbs Up
  

Last edited by DSL on 11th Aug 2017 3:32 pm. Edited 1 time in total 
Post #184633511th Aug 2017 3:32 pm
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12676

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

Never seen it happen on either of my D4s but on SWMBOs Antara it's a pain.

You start to get warnings at 3rd fail IIRC and fix was take it for a run, manually select 3rd gear and rag it,er, just under national speed limit for 15 to 20 minutes. However, since part of under engine cover was removed due to technical issues ( exploding when hot ) the airflow at that kind of speed prevents it getting hot enough to do the regen. So ... Mad as it seems, slow down a bit and it works. Think enjoyable country lane instead of motorway 😀
 .


Dean
====================================

2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer Sad ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms 
 
Post #184633611th Aug 2017 3:32 pm
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First Soldier
 


Member Since: 16 Oct 2022
Location: TR
Posts: 3

Turkey 2011 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

If you look at this topic, I have written my experience with speed and rpm for DPF regen on road.

https://www.disco3.co.uk/forum/dpf-full-81426-30.html
  
Post #23214636th Jan 2023 10:12 am
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Flack
 


Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6224

England 2007 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

The easy way is to select low gear and boot it down the motorway for a about 10 miles or so, no need to break the speed limit. done a few this way before the IID tool got the re-gen option.

Flack Thumbs Up
  
Post #23214846th Jan 2023 1:13 pm
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SN
 


Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710


What vehicle you driving these days Derek?

It was a pain on my Isuzu, definitely more clattery when it was regening - which it insisted on doing every 100 or so miles.

Can't say I've ever noticed anything on the New Defender...
 Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)   
Post #23214876th Jan 2023 1:28 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

Skippy the Skoda. Thumbs Up

Click image to enlarge


Had for 2 1/2 years now, doesn’t time fly when having fun. Thumbs Up
   
Post #23214916th Jan 2023 2:04 pm
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