【摘要】 在车用0#柴油中添入铁基燃油添加剂(FBC),在一台配置无涂敷碳化硅微粒捕集器(DPF)的CA6DL2-35E3高压共轨重型柴油机上对其排放微粒进行捕集加载与再生试验。试验结果表明:在ESC-13工况测试循环下,采用低含硫量的欧Ⅳ0#柴油可实现DPF微粒捕集效率达90%。再生过程DPF中轴线出口位置具有最高燃烧温度,为热应力集中区。依据ESC测试工况权重分布及可实现再生工况范围,可再生与不可再生工况权重比大于极限再生与加载时间比,可实现可靠再生。DPF微粒加载量引起EGR率明显畸变,适用于EGR机内净化耦合DPF的欧Ⅳ技术路线。更多还原

【Abstract】 The trapping, loading and regenerating behaviors of a non-coated SiC diesel particulate filter(DPF) were investigated experimentally on a CA6DL2-35E3 high pressure common rail heavy-duty diesel engine with the fuel borne catalyst(FBC) added into the used 0# diesel fuel. The results show that the particulate trapping efficiency was up to 90% under the ESC-13 test cycle using low sulfur Euro4 0# diesel fuel. During the regeneration process the temperature at DPF outlet position was the highest near the central axis, being the thermal stress concentration area. According to the ESC condition weight distribution and the feasible regenerative condition range, the weight ratio between the regenerative and non-regenerative conditions is much higher than the ratio between the limit regenerative time and loading time. This implicates the DPF with FBC can regenerate reliably. The particulate loading in DPF causes EGR change obviously, so the DPF/FBC technology is suitable for the technical route of EGR coupled with DPF for the Euro4 diesel engine.更多还原