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EGRs a bodge? Eh
Ah crap, I forgot to add the word 'turbo'.
Yeah, the EGR is the root cause but it's exacerbated by the higher spec turbo which grannies along most of the time sucking half combusted diesel.
EGR's may work but how many folk have trouble with their necessary cousin the DPF. If you didn't have an EGR you wouldn't need a DPF (unless you have an older spec car without one like mine) which in turn wouldn't need trips to the stealers to regenerate the buggers after not being bothered driving an extra 40 miles on your commute to do it yourself.
Quite how anyone thought diluting air with exhaust gas would be a good idea is beyond me, I understand the whole argument for NOx generation but there are easier and cleaner ways to reduce combustion temperatures than that (methanol/water injection for one). As trail_rat said it's a quick and easy bodge that increases likelihood of dealer intervention if/when it goes wrong rather than just cooling the damn cylinder.
you have cleaned out an egr havnt you molgrips.....
All that lovely black gunk , the thick sticky stuff and the gritty powder.
Thats what your sticking into your bores with the egr......
I understand why we have em , but at sk points out , there are better ways to achieve lower combustion temps to keep nox formation down, but they cost more and require effort.
Egrs on petrol is a different story as they dont produce nearly as much soot to pump back into your engine.
Egr delete on my engine and it now returns 10 more mpg ( deleted in the form of a bolt into the activation vac hose and a plate over the hole in the inlet manifold. , actuator no longer moves and the gunge doesnt get into my bores.
Cheers trail_rat, will drop you a message 🙂
you have cleaned out an egr havnt you molgrips
Yes, there was nothing in mine, just a grimy film on the parts. Since the ECU fix and consequent egr function restoration I've lost maybe 1-2 mpg.
And you would still produce particulates without egr.
The alternative is catalytic NOx reduction which took VW a decade or so to introduce to the US market so I doubt it's very simple.
Anyone in the GeordieLand that knows a trusted reliable garage that I can go to?
Not too far from the Toon please.
😀
I feel a Top Gear top tip coming on....
Buy a Porsche its cheaper to service than a Kia !!!
You would produce particles, yes, but not nearly as much as with one. They cause far more issues than they solve, you would actually be cleaner doing away with them altogether.
Except for NOx. Which is not nice stuff.
double edged sword - that one - FWIW both cause similar effects on your body.
its all very well saying fir EGRs and DPFs ...
your producing more particulates - but your capturing them - great.
then you go out onto the motorway and burn them off - distributing them about the motorway - YAY .... unfortunantly the air on the motorway still becomes air you or I breath one day. - Hence BODGE
bensales I was only trolling. A very old and tired joke 🙂
then you go out onto the motorway and burn them off - distributing them about the motorway
Well no, they don't just get emptied out, the soot gets burned ie converted into CO2.
Which is another pollutant.
The only way you can get round this whole expensive mess is by just cooling your combustion in the first place with water injection. Ships do it for this exact reason (along with common rail and all the other toys that are old news out there) in order to comply with MARPOL regs. Cooler combustion, lower NOX emissions, low sulphur fuel so no corrosion, bish bash bosh, job done.
Want better results, speak to Koenigsegg and get their camshaftless engine for on the fly timing correction.