Touareg: 2006 V10 TDI
Join Date: Nov 2004
Location: Sydney, Australia
Second Vehicle: 2015 V8 TDI
Thanked 66 Times in 62 Posts
Here's some interesting observations and readings from the DPF covering weeks of city driving, build up of soot, going for a drive up the coast on the freeway at 110kmph where a regen occurred, and back - 140km return weekend trip we do every now and then.
Between the first and second reading it was 12days of city stop start driving. You can see how it builds up. And then how quickly a quick 20min freeway run at 110kmph triggers a regen and burns the soot off.
And even though you are doing a freeway run it starts to build up again to where it was two weeks ago when I hadnt done any freeway driving for months.
Ash levels have remained the same ie 0.04l
1st reading ever taken of DPF, reflecting atleast 3 months of NO freeway driving but city stop start work commute:
Particle filter: time since last regeneration 4083 s
Particle filter: soot mass calculated 11.50 g
Particle filter: soot mass measured 3.08 g
2nd reading taken earlier this morning before heading out for coastal trip(70kms), 95% freeway run at 110km:
Particle filter: time since last regeneration 40855 s
Particle filter: soot mass calculated 34.93 g
Particle filter: soot mass measured 16.68 g
3rd reading take enroute, about 25mins into the trip, on the freeway at 110kms when a regen had just taken place. Laptop was hooked up all the way:
Particle filter: time since last regeneration 60 s
Particle filter: soot mass calculated 6.82 g
Particle filter: soot mass measured 3.89 g
4th reading taken after the trip, total 150kms, 95% freeway driving at 110km:
Particle filter: time since last regeneration 6892 s
Particle filter: soot mass calculated 10.74 g
Particle filter: soot mass measured 2.91 g
what does this establish?
- freeway runs help regen for sure. within 25mins the systems does a burn off and brings levels down dramatically.
- but regen occurs in city traffic just as the same and brings soot levels to the same as freeway runs.
- after a good freeway run and a regen, my dpf soot level has built up and is around the same I had when I had done only months of city stop start driving.
I am thinking maybe a freeway run is really not necessary, as long as there is a regen occurring during the city traffic, which it seems be doing for me. Its about a 30km daily return trip for me in city stop/start traffic btw.
V8 TDI R line MY15, White, Panoramic roof, VW towbar. Dynamic Road Sign Recognition, Lane Assist, Traffic Reports, Google Earth enabled. All Led.
V10 TDI, MYO6 on Conti CrossContact 255/60/18s with RNS510, Paddle Shifters, Rear Diff lock, Mounted Spare, Bluetooth, 4 Zone CC, Keyless, AFS Xenons, TPMS, Easy Entry/Exit, Twin Batteries, Air Suspension, Sunroof, Icom IC440 UHF radio...
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