At 60% load, the SOF in the PM is increased as the ethanol content increased. This is due to the ethanol provides more oxygen component in the fuel and at higher load the ratio of fuel-air is high and produce high rate of oxidation. On the other hand, the evaporation latent heat of ethanol is much higher than diesel, thus decrease the temperature in the combustion chamber during the mixing formation. Therefore, it will not benefit for SOF reduction. At higher load, SOF becomes the main component in the PM and SOF is composed of unburned HC which is easy to be removed by using aftertreatment. Thus, by introducing the oxidation catalyst after treatment, PM can be reducing effectively.
正在翻譯中..
