Technical EGR delete

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Technical EGR delete

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.
 
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.

Urea injection sytems DO NOT REDUCE NOx emissions.
Selective Catalyst Reduction (SCR) systems reduce NOx emissions. Vehicle SCRs require additional nitrogen to operate. One common source of nitrogen used in vehicle SCR systems is urea (Adblue). EGR systems also reduce NOx emissions.

I've never suggesed ammonia as a vehicle fuel.
 
I am another from the think you should leave it alone camp, but, I was chatting to the well informed man at our local breakerts yard a while ago, and he rightly pointed out that there has been little improvement in fuel use and mpg for vast numbers of years and a properly driven car without all this EU clobber bolyted to it does similar mile to the gallon.

Physics dictates that if you burn a gallon of oil it will produce emissions and fumes. I am afraid you cannot get rid of these emissions, they are irrefutable results of getting oil and burning it. Whichever way you cut it they are there. Yes ypu can filter the particulates and you can cat treat some of the output to reduce it but I am very very very far from convinced that my super-dooper EU class 6 emissions rated car is better than my 1985 1.7 diesel as it uses twice the amount of fuel and more than a bit of this excessive consumption is caused by the electronic rubbish that is fitted to the new engine. AND to what end is itr fitted???? All this CRAP is supposed to reduce emissions, but does it? If it does, then why did ALL the corporate criminals in the car industry build get arounds, and what exactly was this crap actually doing for emissions. My take is that it was doing exactly nothing as it certainly wasn't reducing emissions how it was intended, and , if this is the case what exactly is the result of removing it?

Its pretty clear that we don't know because the criminals who went around the system have perverted emissions data and made it totally unreliable and impossible to judge what if any effect it had other than costing a ******* fortune to maintain it in working order.

Whats needed here is a debate about big stupidly over powered engines being allowed. A 4 litre car is nearly 5 times the size of the Panda twin air and its going to be unnecessarily dirty and environmentally damaging. We need to tackle this first and stop allowing these things to be sold.

Unfortunately most of the drivers of these mostly German overkillmobiles are driver by the brain dead who use most or all of the power most of the time. Again its this that needs to be targetted now. I am NOT saying everyone who drives powerful machines is bad, far from it, but in terms of the environment don't try telling me that these cars are not the bulk of the problem you CANNOT get away from the simple basic physical facts!.

I suspect that cars with poorly functioning EGR and DPFs are probably worse than those without.

I would suggest however until the facts are known that we lean on our MP's to reduce cars with "Ludicrous modes" of performance whether petrol or electric as such excessive use of power comes with excessive use of resources. Over time this will have the biggest effect on emissions reduction.

In the mean time I would urge those thinking of making uninformed amateur adjustments to their cars to think again and get the bloddy thing serviced properly instead!
 
Although use of fuel (MPG you say on your end of the channel) has some relation to emissions (burning CH make CO, CO2, H2O), but that is not the only thing emitted. (and probably not the most deadly). NOX and particles are probably more deadly.
I think combustion engines are at the end of their development meaning there's not a lot that can be improved. But compare the 1 litre in 10 Km we found normal in the seventees to what modern engines (with lots more power) consume now.

gr J
 
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.
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.
 
Hello 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.
 
Hello 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.
Post 1


Complete kit to fool the ECU that the EGR it's still functional

Along with the caveat it increases nox

No idea if it's illegal in Algeria

Better option in my opinion it to fix the car properly
 
My thoughts for what they are worth, is that vehicle manufacturers in trying to make their products meet ever stronger legislation, are actually selling something that long term is unsuitable for the use many motorists buy cars for, as in short stop start driving around towns. Consequently the engines never reach their efficient running temperature, eventually clogging up with carbon and acids and contaminating the oil quickly also.
The salesmen do nothing to discourage the buyer of small diesels, who buy on the thought of a vehicle that will do 60 plus mpg and 200k miles at the same time. When in truth around town they will be unlikely to achieve that economy and any small engine that is pushing out the kind of power output that was unheard of in the 70s dragging a massive body around weighing almost double what those older versions did, is not going to see the kind of longevity of the original slow revving diesels in the past. Many small diesel owners are finding it necessary to use DPF cleaner on a regular basis along with a fast dual carriageway trip once a month just to keep the DPF light out!
Furthermore when a car does a "REGEN" where is all that muck going that has built up? Straight out in the atmosphere.
If governments were serious about pollution they would make transportation in towns free and readily available, there by negating the need for many motorist journeys.
All this is before we get to the long term issues that EVs are going to produce.:)
 
EGR and especially DPF are afterthought systems to clean up residual pollution. Unfortunately, any problems upstream will soon lead to a clogged DPF and/or clogged inlet manifold. Problems caused by turbo bearings and seals, dribbling injectors, stuck piston rings (soot clogged) get compounded when the crud is recycled though the engine. Once the inlet starts to soot up, you are into significant work to deal with the problems. Too many short journeys increase the wear rate. The resulting clogged engine might as well be worn out for what it costs to fix.
 
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