forest service and DPF

[Gary - K7GLD]

It's not the speed of the truck that pulls in the air, it's the speed of the exhaust gas. It may double the volume at the outlet, so cutting temperature halfway between EGT and outside temperature. SO if your EGT after DPF is 800 deg, in 100 deg weather, a 50/50 dilution will get you down to 450. Much lower chance of a fire, especially while moving.

Perhaps, at least as far as temps in the tailpipe area are concerned - but much of this discussion is related to the temp right at the DPF itself during its cleaning cycle. If that happens while the driver is actually offroad (remember, that's why some guys BUY a 4x4! :-laf) and in dry brush/weeds tall enough to be near or in contact with the DPF, catastrophe IS possible!



As far as various internal combustion devices and the forest service is concerned, they have had various engine and exhaust requirements for many years now - so this one is really nothing new or unusual.



Of course, the FS themselves operate lots of Dodge trucks - wonder what they will do to address the issue?

 

[betterthanstock]

Perhaps, at least as far as temps in the tailpipe area are concerned - but much of this discussion is related to the temp right at the DPF itself during its cleaning cycle. If that happens while the driver is actually offroad (remember, that's why some guys BUY a 4x4! :-laf) and in dry brush/weeds tall enough to be near or in contact with the DPF, catastrophe IS possible!

Get an infrared thermometer and check the body. It may be double walled. Gasser catalysts are double walled. The pipe is single wall though, I'm sure.

 

[rweis]

Maybe put the DPF inside the fuel tank so the fuel could cool it, like the fuel "cools" the 2nd gen VP44's, NOT! Oo.



Bob Weis

 

[JoelMartin]

Ya then when the fuel lights up it could help clean the DPF.