本文介绍了柴油机新型TR燃烧系统的设计，以及在一台单缸四气门135柴油机上对该系统燃烧特性的试验研究。TR燃烧系统的基本设计思想是要实现“快速燃油喷射、快速混合气形成和快速燃烧”，从而实现预混合近似等压燃烧的部分实现原则。该系统采用带中心喷油孔的多孔喷油嘴，其中侧向喷油孔的孔径较大，为得是增加侧向油束的分裂长度，同时中心喷孔的孔径较小。另外，该系统使用的燃烧室是在收口ω形燃烧室的基础上改进的，底部中央有一平顶凸台，四周壁面上设有导向圆弧。台架试验表明，供油定时为20℃A BTDC，标定转速中小负荷时发动机排气烟度基本为零，全负荷时排气烟度小于0.5BSU。同时排气温度为400℃，但排气中NOx浓度较高。这说明燃烧过程中混合气的形成速率较快，燃烧过程以预混合燃烧为主，并具有较快的燃烧速度。此外，通过比较使用不同喷油嘴时燃烧过程缸压和放热率曲线，证明TR燃烧系统的着火点首先出现在中心喷雾处，并且着火被推迟。

为了减少柴油机的排放污染物，作者设计了新型的TR（Three-Rapidity）燃烧系统。该系统采用带中心喷油孔的多孔喷油嘴，使用的燃烧室是在收口ω形燃烧室的基础上改进的，底部中央有一平顶凸台，四周壁面上设有导向圆弧。在一台单缸135柴油机试验台架上对该系统的性能进行了研究。结果证明，经过优化发动机标定工况的最低油耗降到225g/kw·h，排气烟度小于1BSU。此外，当供油提前角θfs 在从20℃A BTDC到3℃A BTDC 范围内变化时，排气烟度随供油的推迟而略有增加，同时排气中NOX浓度降低。但是随供油的进一步推迟，在中小负荷时发动机排气烟度值降低到0.3BSU以下，同时NOX浓度仍然只有100×10-6左右。

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.

本文对PIV（Particle Image Velocimetry）粒子图像测速技术的原理进行了详细的介绍。作者应用当前先进的数字PIV-DPIV技术，自主开发一套测试系统，对柴油机缸内压缩流场进行测量，对PIV技术应用于气流测试进行了有益的探索。结果表明，该系统可以有效地进行粒子图像识别，精确获取缸内速度场。

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.