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730…739 0,857 850…859 0,699
740…749 0,844 860…869 0,686
750…759 0,831 870…879 0,673
760…769 0,818 880…889 0,660
770…779 0,806 890…899 0,647
780…789 0,792 900…909 0,633
790…799 0,778 910…919 0,620
800…809 0,765 920…929 0,607
810…819 0,752 930…939 0,594

Table 9.3 - The value of the cetane number for different
grades of fuel
Name Value for Value for Values for Investigated
indicator brands brands classes diesel
(DSTU (DSTU (DSTU
3868- 4840- 4840-
99) 2007) 2007)
S W A-F 0 1
Cetane
number is 45 45 51 49 49
not less

The density of petroleum depends on its chemical
composition. Paraffinic hydrocarbons have the smallest density,
the largest are naphthenic and aromatic. The limits of boiling
fractions also affect the density. The higher the temperature of
boiling of fractions of fuel, the higher their density.
The fuel composition depends on the composition of the
combustible mixture, the fuel consumption, the height of the
fuel level in the float chamber.
Density needs to be known not only for the calculation
of dosing systems of power devices, but also for the account of
costs and normalization of gasoline. Motor transport enterprises
receive fuel from the fuel depot in units of mass (kg, m), and
when refueling cars through fuel filling columns for
measurements use volumetric units (v). Knowing the density
list the amount of gasoline from the mass in volume.

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