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Re: DEF Diesel additive?
[Re: finn]
#1462520
07/03/13 10:55 PM
07/03/13 10:55 PM
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Joined: Nov 2007
Posts: 21,822 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,822
Kirkland, Washington
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Quote:
It's actually an 11% ammonia and distilled water mix, if I recall.
Problem is commercial (neat) ammonia sometimes isn't pure enough to use without building crystal deposits on the injector and substrate.
We used to mix our own in the lab. Cost $0.11/gallon to make.
Kinda sorta. Diesel Exhaust Fluid is really 1/3 urea (a nitrogen compound that TURNS to ammonia when heated) and 2/3 distilled/deionized water. When injected into the exhaust stream (think "after treatment") into a catalytic converter-type burner it very effectively consumes harmful oxides of nitrogen from the exhaust.
The beauty of this system, while cumbersome, is that it's an AFTERTREATMENT approach. Why do I stress this? Simple--the engine doesn't know it's there. Period. What does that mean? Simple--the engine can be tuned for max mpg and power without regard to oxides of nitrogen. That's a beautiful thing.
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Re: DEF Diesel additive?
[Re: Rhinodart]
#1462523
07/04/13 05:14 PM
07/04/13 05:14 PM
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Joined: Jan 2003
Posts: 14,610 Not2farfromNashville, TN
Rug_Trucker
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
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The DD15 Detroits we run at work in the Freightliner Cascadias get 7-10mpg depending on how heavy you are hauling.
"The only thing to do for triumph of evil is for good men to do nothing"
"NUNQUAM NON PARATUS!"
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