not sure I would trust an article that states
"Due to heated fuel being returned to the tank, keep fuel tanks as full as possible (to minimise algae growth)"
With regards to "pm10s", that's why some clever person designed the DPF...EGR recirculates particulates where some get re-combusted on their second pass though the engine. The result is even finer particle matter - so called "pm10s". That stuff is so fine that nobody notices but its biologically very harmful.
NOx is increased by high temperatures and hot spots within the engine combustion chamber. Hot spots created by carbon deposits are ideal. Pre heated inlet air (As when exhaust gas is added further tops up the combustion temperatures. More heat more NOx.
There is no catalyst to deal with NOx. It can only be stopped with urea injected into the exhaust gas (AdBlu) to chemically break down the NOx.
EGR re-combusts some of the particulates but side effects are smaller particulates and they can increase NOx.
Exhaust filters trap particulates but struggle with pm10s
AdBlu treats for NOx.
Basically diesels burning dirty fuels produce dirty exhausts. What a surprise.
With regards to "pm10s", that's why some clever person designed the DPF...
Complete nonsense.
Adblue (urea) is used in conjunction with a catalyst, specfically a selective reduction catalyst (SCR = Selective Catalytic Reduction). I provides additional Nitrogen for the reaction. Just injecting Adblue into the exhaust does not reduce NOx.
Ammonia is actually greener than urea for the reaction because urea produces CO2 when reacted with NOx. Ammonia is howerver hazardous, harder to handle and store.
Robert G8RPI
Its not "complete nonsense.noses. It's a simplification which of course you well know. Regardless of the technical details urea injection systems reduce NOx.
Ammonia would make a good vehicle fuel unfortunately the hydrogen it contains is extracted by reforming natural gas which is extremely energy intensive. Low cost intrinsically safe nuclear could do the job. That will never happen because nobody wants low cost nukes (1) they would quickly replace coal oil and gas and (2) they don't suit the green agenda who need a constant public jeopardy to support their politics.
The understanding I have is that on more modern diesels, the main function of the EGR is to reduce NOx, whereas the DPF is solely to reduce soot.Exactly my point. The EGR does not stop enough particulates so they had to add the DPF. Begs the question why is EGR needed when you have a DPF.
Post 1Hello everyone.
Asking what the tuner of choice is for an EGR delete. I could handle the physical removal but need a hand with the coding/tune aspect of the delete. I was a bit dumfounded when Malone quoted me $750 for an EGR tune but if that's the going rate, so be it. Just looking for alternates 1st.