Briefly reviewing the author's path through the research on in-flame diesel soot formation and oxidation processes, a personal reflection on the past and a vision for the future regarding the general research attitude are shared. In the first phase of the author's research path, strong LIF from in-flame PAHs curiously evolved from an obstacle in the LIF measurements of in-flame radicals into a primary research target of the author over following years. Through the development process of simultaneous imaging of PAHs-LIF and soot-LII in diesel flame, it was learned that persistence on the research target, knowing the world state-of-the-art and ideas to overcome various limitations are important. In the second phase of the path, persistence on the complicated and unexplained PAHs' LIF spectra, an encounter with a lovely 70's paper on the EEM technique from MIT and a successful experience in the Rainbow Laser pulse generation by Raman cell might have misled the author to a “maniac” research direction. A desire gradually emerged for research outputs to be practically useful but still unique to universities. In the third phase of the path, an international research collaboration on direct thermophoretic sampling and TEM analysis of diesel in-flame soot started. The persistence on the research target, collaborations with friends working on the world state-of-the-art, and ideas and students' power to overcome various limitations continued and added to be important. However, a research output with practical usefulness had not been reached yet. In the fourth or current phase of the path, research on diesel late combustion reduction within the framework of “SIP Innovative Combustion Technology” started. It is becoming increasingly important to properly understand the needs of automotive OEMs and to respond to them by making the best out of one's specialties. A potential of soot emission reduction by injection rate shaping technology is to be explored in the near future.
抄録全体を表示