已有的研究表明，以快速燃油喷射、快速混合气形成和快速燃烧为设计特征的柴油机TR（Three-Rapidity）燃烧系统能够有效的延长着火滞燃期，增加预混合燃烧，降低排气烟度，但是燃烧过程缸内最高压力和最高温度较高，NOx排放仍然较高。为了进一步验证TR燃烧系统降低发动机排放、实现低温预混合燃烧的能力，在一台经过改造的单缸135柴油机上进行了降低压缩比、燃用柴油-乙醇混合燃料和推迟供油的试验研究。结果表明，压缩比ε降低后，着火推迟，最大放热率增加，缸内最高压力和最高温度降低，NOx排放也降低。但是中高负荷时燃烧速率降低，有效油耗率增加。当燃用乙醇体积含量20%的乙醇－柴油混合燃料时，与燃用柴油燃料相比，着火延迟期延长，烟度大幅度降低。小负荷时缸内最高压力、最高温度、最大放热率和燃烧速率都降低，NOx降低较多；中高负荷时最大放热率高于后者，燃烧速率提高，NOx降低得较少。当供油定时从15oCA BTDC推迟到13oCA BTDC后，烟度基本不变，中小负荷时最大放热率降低，燃烧速度降低，NOx降低较少。大负荷时最大放热率增加，燃烧速度提高，NOx降低较多。90%负荷时，NOx 浓度为4.21×10－4，烟度小于0.4BSU。

在一台单缸135柴油机上对柴油机TR燃烧系统的性能进行了试验优化。首先在TR燃烧系统中燃用柴油乙醇混合燃料，结果表明排气波许烟度值降低，排气温度降低，但NOx浓度有所上升；另外烟度值在小负荷工况下明显较高，高负荷时较小。其次研究了喷油嘴孔径对燃烧系统的影响，结果表明中心喷孔的直径较大时，发动机排气烟度增加。最后对启喷压力进行了优化，结果当启喷压力提高到25Mpa时，发动机小负荷工况下排气波许烟度值小；另外当供油提前角为13℃A BTDC时，发动机标定工况时排气波许烟度和NOx浓度同时很低。

This paper designed and developed a new kind of diesel particulate after-treatment system (EDPF) which using stainless steel net filter combined with corona charging unit as the particulate trapping part and using reverse cleaning unit combined with centrifugal collector as the regeneration part. The result on the 6110 Diesel bench scale test shows that stainless steel net becomes more valuable than other filter medium because of applying corona charging, and the EDPF system is successful.

This paper is to study the modeling and computing method for fibrous filters with image effect based on the previous studies. It takes the exhaust aerosol of diesel engine as an even floating flow composed of exhaust and particulate as without effect of electrical field force and the particulate flow along with other gas phase components. As with effect of electrical field force, the particulate deviate from other gas phase components and at the same time a resistant force from the gas components is added on it. This paper set up a model for calculating the flow and the electric field, as well as the capture efficiency of a single fiber model. The calculated capture efficiency is agreed very well with the experimental data.

通过比较HCCI燃烧和预混合近似等压燃烧理论，设计出了以“快速低压喷射、快速混合气形成和快速燃烧”为特征的柴油机TR（Three－Rapidity）燃烧系统。该系统采用带中心喷孔的多孔喷油器，燃烧室四周壁面上设有导向圆弧，底部带有平顶凸台。另外，在一台135单缸柴油机上对新系统进行了试验研究。结果表明，在与原机相同的供油提前角下，新系统满负荷工况下的油耗率降低16%左右,波许烟度值降低80%，NOx浓度有所增加。进一步推迟供油后，波许烟度值有所上升，NOx迅速降低。供油提前角为13℃A BTDC时，烟度值和NOx浓度都比较低。