Three common lubricant additives, including an antioxidant, detergent, and an antifoamer, were added to diesel fuel to perform a diesel engine bench test. Particulate matter samples underwent thermogravimetric analysis to investigate the effect of lubricant additives on the particulate matter oxidation process, characteristic temperature, and activation energy. The results showed the following. Different lubricant additives result in different variation trends in the thermogravimetric curve of a particulate matter sample by varying the rotating speed and torque. When the rotating speed was stable, as the torque increased, the ignition temperature of the particulate matter of Fuel C declined rapidly during the initial stage and then increased rapidly. When the torque was stable, as the rotating speed increased, the ignition temperature of the particulate matter of Fuel C increased initially and then declined. The particulate matter of Fuel C had the lowest level of activation energy at approximately 57.89 J·mol⁻¹. The particulate matter of Fuel A had the highest level of activation energy at approximately 74.10 J·mol⁻¹. When the fuel has a higher cetane number, the combustion chemical reaction rate is faster and results in a more complete reaction. The active substance contact surface increases, which facilitates particulate matter oxidation.

中文翻译：

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润滑油添加剂对柴油机颗粒物氧化特性的影响

将三种常见的润滑剂添加剂（包括抗氧化剂，清洁剂和消泡剂）添加到柴油中，以进行柴油机台架试验。对颗粒物样品进行热重分析，以研究润滑剂添加剂对颗粒物氧化过程，特征温度和活化能的影响。结果显示如下。通过改变旋转速度和转矩，不同的润滑剂添加剂会导致颗粒状物质样品的热重曲线的变化趋势不同。当转速稳定时，随着扭矩的增加，燃料C颗粒物的着火温度在初始阶段迅速下降，然后迅速上升。当扭矩稳定时，随着转速的增加，燃料C颗粒物的着火温度先升高后降低。燃料C的颗粒物质的活化能最低，约为57.89 J·mol^-1。燃料A的颗粒状物质的活化能最高，约为74.10J·mol ^-1。当燃料具有更高的十六烷值时，燃烧化学反应速率更快并且导致更完全的反应。活性物质接触表面增加，这促进了颗粒物质的氧化。