Quote:
Originally Posted by BB_TX
You are correct that there is a chemical reaction going on. I worked in an industry providing control systems for power plants. SCR is a widely used method to use urea to convert nitrogen oxides into more harmless components to meet emissions guidelines. DEF is urea and the same reaction takes place in our trucks exhaust systems.
“Selective catalytic reduction is a means of converting nitrogen oxides, also referred to as NO ₓ with the aid of a catalyst into diatomic nitrogen, and water.”
(Copied from web)
NOx is one of the pollutants getting a lot of blame on global warming.
That is not regen.
The diesel particulate filter and regen are a different operation, but also in the exhaust system. The exhaust from the engine contains small unburned particles typically called soot or smoke. The DPF traps those particles until the DPF begins to clog. When the computer detects that condition it initiates a regen. That means spraying a small amount of raw atomized fuel directly into the exhaust stream ahead of the DPF. When that fuel enters the DPF it creates extreme heat that essentially incinerates those particles, turning them into components less harmful to the environment.
That’s all for today’s lesson.
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Bill that is interesting. Who did you work for and what did you do.
You meet a lot of interesting people if you just ask.
Lynwood