Advice From Aa Regarding Diesel Particulate Filters (dpf)

[seatkid]

Some of the latest versions of diesel engines both in the new MkIII (Ford) Galaxy/SMax and the MkII (VW/Seat) Sharabangs are fitted with DPF's - Diesel Particulate Filters. These are likely to be standard fit to many diesel engines once Euro V becomes compulsory.

 

This advice from the AA warns about the "regeneration process" - where the soot trapped is burnt off. If you're driving pattern is light, or you driving mainly round town, theres a good chance that the "regeneration process" will not occur as its supposed to, leading to early demise of the DPF which costs ~

Edited August 19, 2007 by seatkid

[gio]

Some of the latest versions of diesel engines both in the new MkIII (Ford) Galaxy/SMax and the MkII (VW/Seat) Sharabangs are fitted with DPF's - Diesel Particulate Filters. These are likely to be standard fit to many diesel engines once Euro V becomes compulsory.

 

This advice from the AA warns about the "regeneration process" - where the soot trapped is burnt off. If you're driving pattern is light, or you driving mainly round town, theres a good chance that the "regeneration process" will not occur as its supposed to, leading to early demise of the DPF which costs ~

[Pacman21]

Would this be the device that stops the use of bio diesel in the TDI PD engine, i have heard that VW only recommend a 5% mix of bio diesel to 95% regular diesel because of this device,

[Willie Krashitt]

DPF's and Bio Diesel:

 

DPF's will work very well with bio diesel, It is the common rail engines which have a problem with bio diesel, in that it can wreck the high pressure fuel pump, as some bio fuels will turn to a jelly like substance if exposed to heat and pressure.

 

Incidentally, I believe that it was the fitment of DPF's and their need to regenerate at idle was one of the reasons VW dropped the PD engine and went common rail (another was that CR engines are substantially quieter), as regeneration can be induced under light load driving conditions by injecting fuel on the exhaust stroke and having the fuel burn in the exhaust manifold. PD engines have no reserve of fuel pressure to do this unlike a CR engine.

 

A DPF is most likely to fail if you continuously do journeys of less than 5 miles and at low speed as it will never get hot enough to naturally regenerate, nor be running long enough to complete the regeneration cycle.

 

George

[tim-spam]

Except that the 2.0TDI in the Sharan is actually a PD engine and a DPF is available as an option (no spare wheel with a DPF though).