It seems to me that you overlooked a few small details ... The people who operate engines with a high percentage of HV all (or almost, if not big risks ...) run in dual tanks, with preheating systems oil which bring its temperature to 75 ° -80 °, at which its viscosity is very little different from that of Diesel. The engine is supplied with HV only when this temperature is reached, which takes a few minutes, depending on the performance of the heaters.
If, as you say, "very high pressure injections (hp pump, injectors)"only take into account THAT viscosity, does this problem still exist? I would love to know ...
Yes, this problem still exists because the viscosity of the heated oil does not reach that of GO!
You should already know that for a common rail engine, even the temperature of the GO is important and that it is regulated to obtain an almost constant viscosity under all operating conditions.
When there are GO temperature management issues, the engine is already not working properly.
Do you see the problem?
Impossible to manage this correctly with the oil (at least with private means).
Woodcutter wrote:Professor31 wrote:For this it would be necessary that the equipment supplier and the manufacturer agrees to take into account the fuel oil, manufactures the appropriate injection elements and reviews the laws of injection of its engine.
So why do some engines work so well? [...]
Professor31 wrote:For the 2) I am talking about High pressures and not old generation engines that I consider to be forgotten because they are too polluting (they run on oil!).
And when you say "very good" it is only in appearance, for how long? and the pollution balance ...
I'm talking about new generation engines, Hdi and dCi in particular.
Well functioning only in appearance, maybe, I don't know ...
Generally, the "experimenters" are quite attentive to the operation of their engines, noting anything that seems suspicious, but I would be happy to agree that it is not enough and that the distance is not very great.
There are however "automotive professionals" on Oliomobile who do more extensive testing and disassemble their engines regularly to see what is going on.
Sorry, but I consider all this to be absolutely unscientific amateurism and without recognized validation protocol.
With regard to pollution, the forumOliomobile ers participated in a subscription to test the emissions of a Bora 1,9 TDI, with diesel, then 100% HV. The results both met Euro 3 standards. It is certainly not a "latest generation Common Rail" engine, but I do not think we can speak of an "old generation engine that is too polluting". .
So sorry!
Euro3 is exceeded from home exceeded!
We are Euro4 and Euro 5 is in preparation.
For forumeurs, I told you what I think above.
Again this is only my opinion and you can think otherwise, it is allowed!