DPF monitoring update
I've been driving on a lot of short trips recently, and the DPF was filling up quite rapidly. Oddly the %full I'm reading has been ocasionally stepping up and down by as much as 15% for little apparent reason.
It would be at 60% and then drop down to 45% and then some time later gradually come up to 60% again. Perhaps it's from the inherently hard to measure differential pressure sensor.
The overall trend is gradually filling with slow driving around with cold starts and in traffic. It has taken about 10days with many short trips (and one longer twisty 50km drive)
I have not done any driving on the highway in the last couple of days (since the 50k test on Monday) and finally it decided to to do a regen at just over 70% and just seconds before pulling into my driveway , how convenient
There was no message on the EVIC
display. The loading did not reach the 80% value mentioned in the Diesel manual supplement (USA version)
Unfortunately, I couldn't turn around and go back out again, I just let it run and took a couple of screen shots, whilst unloading all the frozen food, meat etc.
The Regen sequence does abort after about 2-3 minutes of idling time.
Had I not been monitoring the temps I would not have had a clue the regen was happening at all.
1. Idling at traffic lights, several minutes before whilst 67% fuel 0.7 L/h
2. Idling in driveway after start of regen the CAT temp climbs 530 and the fuel rate is 2.1 L/h. The EGT sensor (near the turbo) is a little higher but the Coolant temp is unaffected.
3. Idling in driveway and temp is still high, the fuel injected seem to be controlled to keep the CAT temp 550 - 620 ish. Fuel hovered around 2.1-2.2 L/h.
Not really much of a smell but could hear the cooling fan going.
4. Regen aborted and the temps went back down to normal for idling condition and fuel flow back down. Coolant temp the same.
As you can see the %DPF loading is only burnt off a little bit.
Also, note that my "Regen indicator status" value does not work and stayed at "0" throughout. (as also observed by XtRmn8)
Now it looks like I'll have to go for a proper drive in the next couple of days to clear it out properly.
It had worked fully a couple of weeks ago, so I would expect it to do the same again.
I'm glad that the sequence appears to work as it is intended.
Gives me more confidence in the emissions systems now.