Re: Dpf regen –
17-07-2017,12:11 PM
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