The cetane number of diesel fuel characterize its combustion in engine, which begins with self-ignition of the fuel. The time from moment of injection of diesel to the cylinder until the moment of self-ignition is the period of self-ignition delay.
If it is too long, the combustion proceeds rapidly (loud engine operation) and less efficiently, hence the increased emission of toxic exhaust components and increased fuel consumption. The diesel fuel self-ignition delay is determined using the reference engine as its cetane number.
The effectiveness of the additive depends on the quality of the fuel. Diesel fuel with a high cetane index show high "sensitivity" to the additive. In order to obtain the intended cetane number, an appropriate dose of the MULTISSOL1000 additive should be used (Figure 1).
Figure 1. The effect of MULTISSOL1000 additive on cetane number.
As a result of introducing into the fuel of CN = 49,1 1000 ppm of the MULTISSOL1000 additive, the cetane number is increased to 53,6. Doubling dose of the MULTISSOL1000 additive results in a cetane number of 56,1. Further dose increasing is not economically justified.