Dpf What??? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 14 (permalink) Old 06-02-2007, 06:59 PM Thread Starter
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Dpf What???

Ok I didn't know where else to put this. These trucks go into regen mode and from what i hear they put off a good bit of smoke??? If this is true then what good is the DPF. Please someone enlighten me here cause i'm loosing track of this devices purpose. Thanks

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post #2 of 14 (permalink) Old 06-02-2007, 07:10 PM
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It's supposed to "catch" the larger particles in the exhaust. When it starts to become to clogged the engine goes into regen. basically increases egt's to burn off these large particles that were trapped by the dpf.
I see your point and don't really have an answer for you. The only studies I have performed on diesel exhaust have been way too much fun to call any of it science.
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post #3 of 14 (permalink) Old 06-05-2007, 08:23 PM Thread Starter
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someone surely has some insight here!: A link that explains what comes out of the dpf that isn't jsut as harmful as the suit might be. There surely is reason behind this (BIG & GAUDY and expensive to replace I'm sure) device and some public info to BACK IT. Or how about accual emission testing results running USLD on both a stock non emission truck at idle or load vs. an emissioned truck during regen mode. Anyone please chime in with info.

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post #4 of 14 (permalink) Old 06-05-2007, 11:04 PM
 
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Trucks with a properly working DPF do not smoke. The exhaust is very hot, but the filter is still working as it regenerates.
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post #5 of 14 (permalink) Old 06-06-2007, 07:23 AM
 
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What if you take the DPF off?
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post #6 of 14 (permalink) Old 06-06-2007, 11:49 AM Thread Starter
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I've read alot of these new truck threads all the brands and seems to me that most of the folks that have the new truck see some smoke at regen mode:shrug: and ofcourse this could just be faulty equipment but my thoughts were if it still smokes but only at certain times then why even bother. I'd just like to see accual emissions testing results.

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post #7 of 14 (permalink) Old 06-09-2007, 11:45 AM
 
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I'm a mechanic for a Peterbilt dealer. It's my understanding on the class 8 trucks, the DPF is collecting the soot. During regeneration the soot is burned and turned into ash. This ash is apparently not harmful to the environment, like the soot is. The manufacturers of the class 8 truck engines are guessing the ash will need to be cleaned out around 300,000 miles or so. I'm not sure what the engine manufacturers of the pickups are saying on that. I know these trucks do not smoke during regen, not sure why the pickups are. Have any of you seen the clip of the ford blowing fire out the exhaust on youtube? http://www.youtube.com/watch?v=Qd7m4mm9ZNM Not sure if this is a scam or not, but it's cool.
Just my experiences with the new emissions diesels on the truck side.
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post #8 of 14 (permalink) Old 06-10-2007, 08:29 PM
 
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the ford pickups are supposed to be able to go to around 120,000 miles on the dpf before needing to be cleaned out.
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post #9 of 14 (permalink) Old 06-13-2007, 05:15 AM
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The ford trucks are running with out the DPF's

Jordan

95-dodge 2500 built to the hill... - sold to litle brother
03- stroker 6.0 studs and basic BS

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post #10 of 14 (permalink) Old 06-13-2007, 03:18 PM
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So are some Chevy's...

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