hi guys,
would it be difficult to install a diesel particle filter to a 300 tdi? brands? suppliers? experiences? things to consider like exhaust temp. etc?
I am looking forward to learn more, cheers, axel
Swaggie
Retrofitting a diesel particle filter would not be an easy proposition for a Tdi. The particle concentration would be too high and it would clog too readily. A common-rail diesel like a TD5 should be OK though - however you would have to make sure that there isn't a sensor for exhaust back-pressure, as this woulkd need to be fooled if present.
Manufacturers to contact would be Mann Filter (MANN+HUMMEL), Donaldson, Fleetguard (Cummins Filtration), and possibly also Mahle.
Swaggie
The latest TDV6 D3 has a particulate filter, but the vehicle has a system to clean it when the back-pressure gets too high, which involves disabling EGR, injecting an extra pulse of fuel, monitor the EGT etc etc. Without a cleaning method, I assume it would have to be regularly replaced.
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Like all modern diesels they also have the turbo controlled by the ECU. To get the exhaust hot enough to burn the particle filter clean it drops the boost right down. This isn't something you can easily do with a wastegated turbo on the 300TDI.Originally Posted by Graeme
The exhaust temp I've heard mentioned is upwards of 650 deg C to burn the filter clean.
There have also been some steep learning curves by manufacturers. Apparently toyotas Avensis diesel won't burn the filter clean if it's continually run above 160km/h. Testers on the autobahn in Germany found them ****ing smoke out.
Search for "avensis" on this page, it's under "clean diesels" about 2/3 down.
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Is it a sensitive area you're working in or are you just trying to clean up your vehicle?
Swaggie
There are a few different technologies, not all require the soot to be periodically combusted in this way.
At a recent conference I saw an IR video of the flame front moving through a filter - was very impressive and only took a few seconds.
thanks for the replies!
now, from what I understand so far is that there are basically two types of particle filter systems:
a.) "closed" systems, exhaust temperature controlled, engine adjusted, ECU, injection of some fuel into the filter to burn the sooth off and so on. those systems are complicated however, extremely efficient (~90%)!
for those filters my beloved defender probably only qualifies in the sense that it certainly will not go faster than 160km/h where the self cleaning can make problems. :-)
b.) "open" system (which are mainly used in the after market); those are less efficient (30-50%) which is why the cleaning does not have to be so sophisticated ... however, the exhaust temperature must still be hight enough to burn the sooth off. they say that those filters you can just weld into your exhaust pipe (maybe instead of the muffler). this is what made me listen up.
now, most of the reading I could find was driven by arguments around EU "exhaust taxation", marketing blurb and fairly theoretical. and I still would not know where I would start and what exactly to consider for a practical project.
cheers, axel
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