Tips on keeping the DPF clean

[GMcL]

Originally Posted by Clan

The system knows where it is if you stop in the middle of a regeneration and will continue to finish off on your next journey. No need to do anything whatsoever to "help" it..

For clarification is this referring to Euro VI VEA engines or something else ?

I've always bought into the if it's regenerating let it finish mind set. Last night driving home my 5 cylinder D3 Euro V started regenerating. After reading the above thought I'd give it a go. DPF soot level was down to around 20g when I arrived home and switched off. This morning got in the car expecting, after warming up, the regen to continue. It didn't.
The soot level started from 20g and looks like it is waiting for the 25.5g trigger to start again.
My morning commute is 25 miles, mostly motorway ~20 miles.

The graph on the left is my journey home showing the regen running as I arrived home, the graph on the right shows my journey in to work this morning.

[BlueDevil]

I'm not sure it continues the regen "in the morning". I readd somewhere (but I can't remember where) exactly what GMcL says - if you interrupt the regen, it won't restart it until it reaches that soot threshold in the filter. So it depends on when you interrupt it - if it only managed to lower the soot by 1-2g, for example, it means it will start regen on the next trip (most probably). But if you got to 10g and the threshold for starting is 25g (just throwing random numbers here), then it won't start again until 25g are reached.

This is not to say that interrupting regen will throw your car to its knees. Just that if you continuously do it, (almost) never letting it finish the regen, it will result in more and more soot being baked in the filter, plugging it more and more over time.

We all interrupt a regen every now and then, and it's perfectly alright, as long as there are more of those that you don't interrupt.