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This research focused on principles and developments of continuous regeneration DPF technology, which is an after-treatment technology for the reduction of particulate matters because of its superior comparability and possible applicability. There were some discussions about engine parameters such as engine driving conditions as well as sulfur contents prerequisite to prevent poisoning effect on oxidation catalysts. Besides, this research discussed mainly about some design points of view based on experimental data, and commercial CFD codes such as CFD-ACE and KIVA-3V were used partially to investigate the affect of back-pressure occurred by CRDPF. The test was done on an 8000cc heavy-duty turbo diesel engine on which continuous regeneration DPF was installed in order to investigate regeneration characteristics of DPF and engine performance under several conditions of standard diesel or 50ppm ultra low sulfur diesel.