中文摘要：

建立了低温等离子体喷射（non-thermal plasma injection，NTPI）技术再生板翅式废气再循环（exhaust gas recirculation，EGR）冷却器的试验平台及EGR冷却器换热性能测试系统，考察了NTPI对EGR冷却器的宏观再生效果；利用热重分析（thermo-gravimetric analysis，TGA）和傅里叶红外光谱分析（FOurier transforrn infrared spectroscopy，FTIR）技术，对NTPI处理前后EGR冷却器的内部发层进行取样研究，探索了NTPI对发层样品理化特性的影响。研究结果表明：NTPI技术可以有效渗透剧离EGR冷却器气道内壁的炭层，并能够显著改善冷却器的换热性能；在NTPI作用下，发层中挥发性物质（volatility fraction，VF）的比含量明显降低，固体炭的比含量虽增加但燃烧活性提高；同时低温等离子体可有效去除炭层VF中的醛酮类有机物，对有机酸酯类有机物无明显脱除效果。

英文摘要：

On the basis of non-thermal plasma injection （NTPI） technology, an experimental platform for regenerating stack-fin type exhaust gas recirculation （EGR） cooler was established. To examine integral regeneration effect by NTPI, a set of EGR cooler heat exchange performance test system was built up. The thermo-gravimetric analysis （TGA） and Fourier transform infrared spectroscopy （FTIR） were used to investigate the variation of physical and chemical characters of deposit layers＇specimen taken before and after regeneration. Results show that NTPI can penetrate and peel off the carbon layer effectively, and improve the heat exchange performance significantly. The content of volatility fraction （VF） in carbon layer was decreased by NTPI obviously, which caused the higher content of soot in carbon layer but also improved combustion activity. And the decreased content of VF was mainly for the removal of aldehydes and ketones but not for the organics acid esters of organic compounds.