For this type of injector, the fuel viscosity changes the injection
duration and hence for the same duration of pulse, it also
changes the total mass injected.
Concerning the performance of the injector shown by the value
of the discharge coefficient, two behaviors were observed:
s at positive temperatures or for fuels without additives
(B100), the discharge coefficient decreases linearly with
increasing viscosity;
s at negative temperatures for fuels with additives (winter
diesel, diesel or blends), the viscosity measured at atmospheric
pressure is not the only property which modifies
the discharge coefficient. The effect of additives cancels out
the impact of viscosity and the diesel and fuel blends then
have the same discharge coefficient. For winter diesel