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中文摘要：
通过调节废气再循环（exhaust gas recirculation, EGR）冷却器积炭加载试验时的冷却水温度，得到了四个冷却温度（20、40、60、80℃）下的积炭，利用热重微商热重分析法研究了冷却温度对EGR冷却器积炭性质的影响。并利用低温等离子体（nonthermal plasma, NTP）技术对不同冷却温度下加载积炭的EGR冷却器进行再生，通过观察再生产物中碳氧化物（COx）的变化，分析了冷却温度对EGR冷却器再生的影响。研究结果表明：积炭中可溶性有机物（soluble organic fraction, SOF）的反应活性随着冷却温度的降低而逐渐升高，干碳烟（dry soot, DS）的氧化活性则随着冷却温度的降低而降低。EGR冷却器在冷却温度为20℃时所加载的积炭量较少，积炭中SOF的反应活性较高，DS的氧化活性不高，但DS的起燃温度较低。在同等再生条件下，冷却温度为20℃时加载积炭的EGR冷却器率先实现了完全再生，且再生产物COx中CO所占比重仅为20.3%，约为冷却温度80℃下加载时的4/7倍。
英文摘要：
The fouling formation of EGR cooler as a function of coolant temperature was investigated by thermo gravimetry-differential thermo gravimetry （TG-DTG） analysis, and the fouled EGR cooler was regenerated by non-thermal plasma （NTP） technology. By observing the variation of carbon oxides during regeneration process, the effect of coolant temperature on EGR cooler regeneration was investigated. Results show that reaction activity of soluble organic fraction （SOF） increases with coolant temperature decreasing, while the oxidation activity of dry soot （DS） decreases with coolant temperature decreasing. A small amount of deposit mass is condensed at the low coolant temperature of 20 ℃, but with relatively high reaction activity of SOF and low initiation temperature of DS. Meanwhile, the complete regeneration of the EGR cooler fouled at 20 ℃ can be achieved first, and the carbon monoxide （CO） proportion in regeneration products is 20.3 %, only 4/7 of that at 80 ℃.
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