RE: RE: demand for cat. convertersToday30 May 2020 10:56
Morning, AstonDB9,
Yes, you are correct, to comply with Euro 6 regulations, many new diesel-powered cars built since 2006 use SCR technology to inject tiny quantities of AdBlue (which is a 32.5% solution of pure urea in demineralised water) into the car’s exhaust system gases. When this solution combines with exhaust emissions, it breaks down the harmful mono-nitrogen oxides in diesel exhaust. This technology has been used in buses and heavy lorries for a long time, so its effectiveness has been proven and its reliability is very good, provided you remember to top it up :-)
The Diesel engine is a very efficient engine, much better than the traditional Petrol I.C.E. The unforeseen problem is when you try and clean up particulates and Nox with catalysts you inevitably produce more of the global warming gas Co2, so because of this engine designers have drifted to the idea of the Direct Injection Petrol engine where the Petrol injector is fitted directly into the cylinder head and not the inlet manifold as had previously been the case, so the NEW petrol engine now resembles for all intense and purpose a Diesel compression ignition engine albeit with a lower compression ratio and a normal spark plug to initiate the combustion. Great idea and reduced Co2, but unfortunately this new engine has been found to produce minute 'Nano' particulates that are much more harmful to humans.
Engine manufactures came up with the EGR ( Exhaust Gas Recirculation ) valve, which enables an engine to consume (eat) a percentage of its own exhaust (effluvium )to try and clean up its emissions, If we as humans tried that trick it would do us no good at all, and surprise, surprise, it does the engine no good at all either by clogging up the inlet manifold and the valve its self, so something else to go wrong and land the vehicle owner another garage bill to sort out.
All of the I.C.E. engines run on normally either Petrol or Diesel (leaving out LPG)
Fuel is not what it was, Diesel could be stored virtually indefinitely, my self I had a 10-liter emergency fuel can that I carried in the boot for over 22 years never having the need to use it, on checking its contents they were as good as the day it was filled, I mean whats 22 years added to several million in the ground. Modern Diesel has a percentage of Biodiesel added to make it perceived to be more green, yeah, right, in doing that along with removing the Sulphur content any recent Diesel fuel now attracts the growth of pond life algae at the intermediate layer between any water in the tank and the fuel itself and is a major cause of fuel filter blockages especially if you are a boat owner.
Petrol, ok, bet you did know this, regular modern petrol can contain up to 350 different components, it is not what it used to be either, it now has a percentage of added Ethanol again to make it perceived to be more green,
Continued in next post-
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