Concerns over DPF

[Django x2]

The issue with low met criteria for modern DPFs is that it's not a true regen. The whole process involves exhaust gas temperatures before the turbo being well over 500c. That's not going to happen sat on the drive way for 5 minutes or pootling around town at 10mph. For a proper regeneration to cook off the soot, the revs need to be in turbo range with the exhaust gas temps high enough to get cooking.

 

[Rroff]

The issue with low met criteria for modern DPFs is that it's not a true regen. The whole process involves exhaust gas temperatures before the turbo being well over 500c. That's not going to happen sat on the drive way for 5 minutes or pootling around town at 10mph. For a proper regeneration to cook off the soot, the revs need to be in turbo range with the exhaust gas temps high enough to get cooking.

Yeah agreed it isn't a true regen but it is enough to keep it maintained you might have to do the odd proper regen but as long as the criteria is met you won't be having to do regular motorway miles to avoid (exceptions aside) expensive DPF bills as some claim. (Though that might be more true for some vehicles than others I don't know - but I know it is true for the vehicles I have experience of).

 

[robj20]

The issue with low met criteria for modern DPFs is that it's not a true regen. The whole process involves exhaust gas temperatures before the turbo being well over 500c. That's not going to happen sat on the drive way for 5 minutes or pootling around town at 10mph. For a proper regeneration to cook off the soot, the revs need to be in turbo range with the exhaust gas temps high enough to get cooking.

There are exceptions, mine does a "true" regen at any point, only criteria seems to be engine up to temperature.