柴油机微粒捕集器燃油添加剂催化再生研究

Using Fuel Additive for Regeneration of Diesel Particulate Trap

采用铁基的燃油添加剂对柴油机微粒捕集器再生特性进行了研究。结果表明,捕集器再生温度点与发动机排气流速、含氧量及微粒累积量等因素相关,排气当中含氧量的提高及捕集器当中微粒累积量的增加都有利于再生温度的降低。采用燃油添加剂可以明显降低微粒的着火点。受发动机排气特性影响,单独依靠添加剂难以实现全工况再生。

Research on regeneration characteristic of diesel particulate trap using fuel additive is conducted on light duty diesel engine. The results show that regeneration temperature has great relationship with exhaust velocity, oxygen content and particulate matter deposited in the trap. Increasing oxygen content in the exhaust and the particulate matter deposited in the trap can lead to decrease of regeneration temperature. Addition of Fe-based fuel borne catalyst in diesel is effective in lowering the temperature of soot combustion. It is difficult to fulfill regeneration in the entire engine operation region due to the characteristic of exhaust.