期刊
ENERGIES
卷 4, 期 11, 页码 2049-2060出版社
MDPI
DOI: 10.3390/en4112049
关键词
two-stage combustion; injection strategy; combustion characteristics; NOx reduction characteristics; soot emissions
资金
- Ministry of Knowledge and Economy (MKE) [10033863]
- Second Brain Korea 21 project
- Korea Evaluation Institute of Industrial Technology (KEIT) [10033863] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The aim of this study was to confirm the effects of two-stage combustion on the combustion and NOx reduction characteristics of a four cylinder direct injection diesel engine. In order to analyze the combustion and emission characteristics, various injection parameters, such as injection quantity, injection timing and injection pressure were used under constant engine speed and engine load. In addition, the experimental results of two-stage combustion are compared to the single injection when injection timing is 5 degrees BTDC. The experimental results showed that NOx emissions were significantly reduced when applying two-stage combustion. In particular, an injection strategy when the first and second injections have a same quantity, the results showed the maximum reduction of NOx emissions in this experiment. The NOx emissions were also reduced when the timing of the first injection was advanced. However, NOx emissions indicated almost similar concentration regardless of first injection timings when the first injection timing was earlier than 50 degrees BTDC. In the case of soot emissions were slightly increased compare to the single injection cases at tested conditions.
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