As indicated in figure 2, along with the increase in the mixing ratio the benzenoid substances in the oils lessen. Figure 3 shows an increasing evaporation rate of the oils in respect to temperature as the mixing ratio increases. The analytical result from a GC-Mass spectrometer, illustrated in figure 4, proves that the blended oil is similar to WPD.

　

Table 1: C. Oil Properties

Table 2: WPD Properties

Fig. 1: Change in CCAI, Kinematic Viscosity, Desity and Sulfur Content of Experimental Oils

　

Fig. 2: UV absorbency of Experimental Oils

Fig. 3: Evaporation Rate of Experimental Oils

Fig. 4: Analysis by GC-Mass spectrometer of Experimental Oils

　

3. EXPERIMENTAL METHODS AND EQUIPMENTS

　

Table 3 states the specifications of the engine used for the experiment and figure 5 illustrates the experimental schematic diagram. The concentration of NO_x, SO₂, CO₂, O₂, NO and emission rate of PMS were measured. NO_x concentration was measured with a chemiluminescent analyzer (NOA-305A, Shimazu), O₂ concentration with a paramagnetic detector (POT-101. Shimadzu), CO₂, NO₂, CO with a constant potential electric detector (Testo 33) and SO₂ with an infrared-ray analyzer (URA-107). PMs were sampled on a glass-fiber filter at the rate of 60 liters of gas per filter.

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