As emissions regulations are tightened, various engine and emission reduction improvements have been applied. The reduction of particulate matter (PM), a major diesel engine emission, relies solely on after-treatment in the diesel particulate filter (DPF). It is not possible to satisfy current exhaust regulations without a DPF installed downstream of a diesel engine. Therefore, in the design of DPF systems, thermal stability and durability at the high temperatures experienced during the regeneration process are considered critical in determining the substrate material, as any defects (cracking, damage, or melting) cause increased pollutant emissions. In this study, the regeneration characteristics of 10.5 in cordierite DPF substrates applied in large commercial vehicles were investigated according to pore structure. The pore structure was changed while maintaining the thermal expansion coefficient and thermal properties by changing the particle size of talc during fabrication. Two different substrate compositions were evaluated and applied in a 6-L diesel engine to analyze their thermal characteristics during normal and uncontrolled (drop-to-idle) regeneration according to PM loading. The improvement in pore structure was observed to increase the PM oxidation rate under normal regeneration and extended the PM loading limit under uncontrolled regeneration.

随着排放法规的严格，已经应用了各种发动机和减排措施。减少颗粒物质（PM）是柴油发动机的主要排放物，仅依赖于柴油颗粒过滤器（DPF）中的后处理。如果没有在柴油机下游安装DPF，则无法满足当前的排气法规。因此，在DPF系统的设计中，再生过程中遇到的高温下的热稳定性和耐久性被认为是确定基材的关键，因为任何缺陷（破裂，损坏或熔化）都会导致污染物排放增加。在这项研究中，根据孔结构研究了应用于大型商用车辆的堇青石DPF基材中10.5的再生特性。通过在制造过程中改变滑石的粒径，在保持热膨胀系数和热性能的同时改变了孔结构。评估了两种不同的底物成分，并将其应用于6升柴油发动机中，以根据PM负荷分析其正常和不受控制的（液滴到怠速）再生过程中的热特性。观察到孔结构的改善可在正常再生下提高PM氧化速率，并在不受控制的再生下延长PM负载极限。评估了两种不同的底物成分，并将其应用于6升柴油发动机中，以根据PM负荷分析其正常和不受控制的（液滴到怠速）再生过程中的热特性。观察到孔结构的改善可在正常再生下提高PM氧化速率，并在不受控制的再生下延长PM负载极限。评估了两种不同的底物成分，并将其应用于6升柴油发动机中，以根据PM负荷分析其正常和不受控制的（液滴到怠速）再生过程中的热特性。观察到孔结构的改善可在正常再生下提高PM氧化速率，并在不受控制的再生下延长PM负载极限。