Abstract
Tightening regulations for NO_X emission from diesel engines have revived the significance of temperature measurement of their combustion process. In this study, a newly introduced CMOS camera (HG-100K) was tested to evaluate its potential for combustion visualization and temperature measurement using two-color analysis. Although small modifications in analyzing procedures and some limitations on temperature resolution should be pointed out, measurement results showed its strong potential as a high-speed visualization device for engine combustion. Furthermore, to demonstrate the effectiveness of the two-color method established in this study, the NO_X reduction effect of direct water injection (DWI) system could be strongly backed up.
