Effect of Two-Stage Fuel Injection Parameters on NOx Reduction Characteristics in a DI Diesel Engine

Energies

Kyusoo Jeong²  Donggon Lee²  Sungwook Park¹ 

[1] Department of Mechanical Engineering, Hanyang University, 17 Haengdang-dong Sungdong-gu, Seoul 133-791, Korea; E-Mail:;Graduate School of Hanyang University, 17 Haengdang-dong Sungdong-gu, Seoul 133-791, Korea; E-Mails:

关键词: two-stage combustion;    injection strategy;    combustion characteristics;    NO_x reduction characteristics;    soot emissions;   

DOI  :  10.3390/en4112049

来源: mdpi

【 摘 要 】

The aim of this study was to confirm the effects of two-stage combustion on the combustion and NO_x 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° BTDC. The experimental results showed that NO_x 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 NO_x emissions in this experiment. The NO_x emissions were also reduced when the timing of the first injection was advanced. However, NO_x emissions indicated almost similar concentration regardless of first injection timings when the first injection timing was earlier than 50° BTDC. In the case of soot emissions were slightly increased compare to the single injection cases at tested conditions.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.