2.2.4. Real Engine Combustion System

The engine used in this study is a direct-injection type single-cylinder CI engine (Daedong Co., Model:ND10DE, Kyeongsan, Korea). Figure 6 shows the single-cylinder diesel engine system and its specifications are given in Table 5. Table 6 shows the combustion test conditions for the single-cylinder diesel engine. The emission performance of the most optimized DPI type and the conventional type was analyzed by measuring the exhaust gas through an exhaust gas measurement system (Horiba, Model:MEXA-554JKNO*<sup>x</sup>*, Kyoto, Japan). The main specifications of the exhaust gas measurement system are shown in Table 7.

**Figure 6.** Experiment system of single-cylinder diesel engine.



**Table 6.** Engine combustion test conditions.


**Table 7.** Specifications of the exhaust gas measuring device.

