Exhaust Particulate Filters

[ChipD]

Just purchased my first Dodge after 20+ years grief from my Dad. Love the truck 3500 4x4 with 6. 7 and 6 speed automatic. Thus far I'm questioning myself why I didn't get one before now. My question is the particulate filter in the exhaust system, is there a PM regimen for this? Never had a diesel that didn't have a black exhaust pipe... . have plenty of jeans that prove this fact!

 

[ThrottleJockey]

What's up, Chip? Welcome to the TDR!



Get this, some Class 8 Manufacturers have designed the particulate filter to be cleaned with extreme combustion temps as resulting from raw diesel fuel being introduced directly into the exhaust stream and BURNING all the soot that the filter has trapped. Here on Earth, we call that an 'Afterburner'.



(Uh, won't that re-introduce the soot into the atmosphere, practically eliminating the purpose of the particulate filter in the first place?)



I might be dumb, but I'm not a friggin' moron!



Chip, there are different camps of thought on the service intervals of these things. These camps are called Cummins, International, Caterpillar... ... etc.

This is a new technology. I know people who have purchased a new Class 8 tractor, removed this filter, cut it open, gut it, re-weld it and re-install it. :-laf



Have a great day!

 

[RDyson]

I talked to the local tech last week about the PF. He had just got back from 3 days of training on the new trucks. He was told that it would be a $10k fine for the owner and a $10k fine for the shop that did it. It looks like they are serious about this new stuff--if they were to catch it.



Randy

 

[JFaulkner]

I talked to the local tech last week about the PF. He had just got back from 3 days of training on the new trucks. He was told that it would be a $10k fine for the owner and a $10k fine for the shop that did it. It looks like they are serious about this new stuff--if they were to catch it.



Randy

I heard that also. I didn't hear the exact amount but that it was going to be high enough to get your attention, and that the fine would reflect the assumption that it has been that way for at least 30 days.



I don't think there is much as far as PM on them. I know on the class 8 trucks there suppost to not require any maintaince for at least several hundred thousand miles, and even then they don't have to be removed from the truck to clean them (Caterpillar at least, don't know about the others).

 

[jmy]

Fleetgaurd (cummins owned) makes the DPF used withe the cummins engines.

For fleet owners running the bigger engines Cummins claims 250K to 400K between, depending on application, between removal and cleaning cycles on the DPF. The cleaning is eventually required because regen cycles clear soot but also create ash that collects in the DPF.

Check link for detail
Cummins Unveils '07s

 

[ThrottleJockey]

How would they find out? an opacity test wont catch it. How would they know? They would have to dismantle the filter and cut the can open to see. Like this is going to happen. They can't even keep a scale open on the interstate because of lack of revenue. The 'fine' is astronomical to scare you because this is something they cant enforce.

 

[SnoKing]

This is the same 10K fine for removing a muffler on a rig that weighs more than 10K right? SNOKING

 

[JFaulkner]

How would they find out? an opacity test wont catch it. How would they know? They would have to dismantle the filter and cut the can open to see. Like this is going to happen. They can't even keep a scale open on the interstate because of lack of revenue. The 'fine' is astronomical to scare you because this is something they cant enforce.

I'm not sure an opacity test wouldn't show somthing. The reason I say this is everyone keeps bragging how the inside of the stacks are cleaner than the outside and the DPF is one of the major changes of the engines. And as much as they cost I'd like to think they do somthing major. :-laf



As far as roadside tests, I agree not going to happen. At least not in rual areas A few of the HWY partol I've been fortunate enough to run into could barely run a window tint meter.

 

[CogginsP]

What's up, Chip? Welcome to the TDR!



Get this, some Class 8 Manufacturers have designed the particulate filter to be cleaned with extreme combustion temps as resulting from raw diesel fuel being introduced directly into the exhaust stream and BURNING all the soot that the filter has trapped. Here on Earth, we call that an 'Afterburner'.



(Uh, won't that re-introduce the soot into the atmosphere, practically eliminating the purpose of the particulate filter in the first place?)



I might be dumb, but I'm not a friggin' moron!

Well put!:-laf :-laf



I have heard that some of the new 6. 4L fords have been recalled, as during the regeneration cycles, the EGTs get so hot that they will burn any vehicles near the tail pipe.

 

[JFaulkner]

All '08 Kenworth trucks now come standard with 6" stacks to help cool the exhaust gasses which can leave the pipes close to 1500* during regen. (according to the salesman) Hotdogs anyone?

 

[ThrottleJockey]

Jeez, that's hot!



I wonder if all that heat will change the structure of the downstream exhaust parts. ( I need a Metalurgist!) namley the turbine housing and exhaust wheel.



Boy, that would suck. :{

 

[CogginsP]

Jeez, that's hot!



I wonder if all that heat will change the structure of the downstream exhaust parts. ( I need a Metalurgist!) namley the turbine housing and exhaust wheel.



Boy, that would suck. :{

Correct me if I'm wrong everybody, but isn't the fuel injected in post-turbo? Can't imagine how fast those turbos would get spinning if fuel was injected before them in the exhaust cycle

 

[DennyDay]

Welcome aboard ChipD - - - From the father that gave you grief for twenty years for not buying a dodge Diesel!



For CogginsP - - The pre diesel injector system is an option on the Ford 6. 4. Its called Powerstroke with flame thrower!



Denny