How do chemical reactions taking place only in the exhaust system cause improved engine performance and lower maintenance?
DEF performance claims
Discussion in 'Questions To Truckers From The General Public' started by Eleanor Weiss, Jan 5, 2022.
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They don't.
They reduce a certain toxic chemical released in the exhaust and replace it with another toxic chemical being released.Lpirtle, justcarhaulin, jsnell and 3 others Thank this. -
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I wonder too ... do diesel locomotives use DEF?
Eleanor Weiss -
Eleanor Weiss -
https://www.discoverdef.com/def-overview/
"SCR is a so-called "aftertreatment" technology,
which means that it destroys harmful emissions
after combustion. This gives manufacturers
greater scope to tune engines to improve fuel
efficiency and increase power. Owners of SCR
vehicles enjoy greater reliability and longer oil
change intervals, which add up to impressive
operating cost savings over the life of the
vehicle."
Looking carefully, it seems the claims are not that the DEF itself improves things, but that if a manufacturer can depend on DEF being used, the manufacturer can alter the engine design to bring about the improvements.
Apologies - apparently that's what I've heard from time to time and it didn't sink in.
Eleanor WeissBennysPennys Thanks this. -
The "tuning" they are currently doing is to compensate for the other regulated emissions stuff that actually hurts performance and causes more pollution.
The emissions stuff put on equates to trying to run a marathon while wearing a plastic bag over your head.D.Tibbitt, MACK E-6 and RockinChair Thank this. -
If you change the DEF system to a water methanol injection system on the intake side, it will definitely increase power.
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Studebaker Hawk and MACK E-6 Thank this. -
So, does anyone know if diesel locomotives are required to use DEF? Or diesel farm equipment? Or diesel boats?
Eleanor Weiss
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