Akasha wrote:Have any tests already been done by adjusting the injection pumps to balance less diesel?
It is useless to reduce the amount of diesel if not to slow down. It is not like on a petrol engine or one seeks to decrease the richness (percentage mass petrol / mass air). On a Diesel there is much more air than it takes to burn it. There is no butterfly that reduces the air flow and the engine sucks whatever it wants. At low speeds the excess air is enormous.
There is only at full pot that there is only 10 to 15% of air in excess compared to the perfect stoichiometric combustion. So the fuel you inject is just to get the horses you need. The combustion is not homogeneous since the diesel is injected very late (a little before and after the top dead center). He didn't really have time to mix intimately with the air.
This is where the water and / or water vapor acts to break / disperse the diesel droplets so that they can have better contact (exchange surface) with the oxygen in the air and therefore improve combustion with equal amount of diesel. The chemistry of combustion is a little different and also improved which also limits the appearance of particles. (There are a few posts that will explain this more fully if you are interested).
A+