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  1. Dpf regen 
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    I have had my 3.0 tdi Quattro for about 2 months now and have a question about dpf. I have read that you need good long runs to get dpf to regen and be over 2000 Regen to happen. If that is true then all my love runs will not cause the regen process to start as sitting at 70mph the car is only doing 1500 rpm. Is this correct? Do I need to sit in 3 Rd gear for about 15 mins on every long run? Bit confusing as some nights I get in from work ( 1/2 trip), in traffic and the fans run for while when I stop suggesting regen had started. Any help or advice apriciated.
     
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  2. Re: Dpf regen 
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    Regen seems to happen when the engine (exhaust manifold) is hot enough and it decides it needs a regen - it is not a specific RPM, but higher RPM pushes up engine temps. I can always tell on my BiTdi because it starts to behave differently - it holds lower gears than normal (for example, it will usually drop into 8th when you'r cruising at 60mph, but it will stay in 7th).

    There seems to be some correlation between engine oil temp and exhaust manifold temp... I can see the oil temp as I had the "lap timer" mod done with VCDS and it is visible in that MMI view. Oil temp seems to need to be above about 82C before regen will run. If I get home and it's doing a regen I've got into the habit (time permitting) of taking it for a 15 or 20 minute 'blast'. I'll leave it in sport mode and when I get onto the local dual carriageway stick it in 6th (ZF gearbox is 8 speed). You can see oil temp climbing - it will get up towards 100C - and that seems to correlate with high exhaust manifold temp so DPF regen proceeds.
    A6 allroad BiTdi (MY14, July 2013 - DAB & power tailgate). Glacier white, tech pack (HDD Nav, colour DIS, Parking Plus), sports seats, 4 zone climate, heated seats front and rear, ambient lighting, 75L fuel tank, adaptive Bi Xenon headlights
     
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  3. Re: Dpf regen 
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    So it's temperature rather than high reves. So it should regen on motorway run without any problems.
     
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  4. Re: Dpf regen 
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    My understanding is that it is specifically exhaust manifold temp that matters. You have no way to measure that - although as I noted oil temp seems to be something of a gauge.

    Patently higher revs should help generate higher exhaust manifold temps. But ambient conditions will play a part too... a run down the motorway today (28C here) might well be enough to run the regen, middle of January when it's -3C maybe not.

    Get the VCDS mod done for the lap timer... lap timer is a chocolate teapot, gear ship indicator (ala F1 car) is occasional fun, boost indicator is OK but the oil temp is the main reason to have it.
    A6 allroad BiTdi (MY14, July 2013 - DAB & power tailgate). Glacier white, tech pack (HDD Nav, colour DIS, Parking Plus), sports seats, 4 zone climate, heated seats front and rear, ambient lighting, 75L fuel tank, adaptive Bi Xenon headlights
     
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  5. Re: Dpf regen 
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    It'll do it when it wants to. Wouldn't worry about it unless all you do is short runs

    Sent from my ONEPLUS A3003 using Tapatalk
     
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  6. Re: Dpf regen 
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    Quote Originally Posted by jmagee View Post
    Wouldn't worry about it unless all you do is short runs
    If you do lots of long runs then you are probably right, but even so if you park the car and a DPF region is happening then it's likely it will not complete. General opinion is that it a bad thing to have that happen too often...
    A6 allroad BiTdi (MY14, July 2013 - DAB & power tailgate). Glacier white, tech pack (HDD Nav, colour DIS, Parking Plus), sports seats, 4 zone climate, heated seats front and rear, ambient lighting, 75L fuel tank, adaptive Bi Xenon headlights
     
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