Effects of multiple-injection strategies on overall spray behavior, combustion, and emissions reduction characteristics of biodiesel fuel

Su Han Park, Seung Hyun Yoon and Chang Sik Lee

Applied Energy, 2011, vol. 88, issue 1, 88-98

Abstract: This study described the combustion and exhaust emissions characteristics of biodiesel fuel with multiple-injection strategies. Also, this investigation included the free spray characteristics and in-cylinder spray behaviors of the multiple-injection modes. Free spray and in-cylinder spray images were obtained from the spray visualization system. Combustion and exhaust emissions characteristics were analyzed using a single cylinder diesel engine with a displacement volume of 373.33 cm3 and a compression ratio of 17.8. The exhaust emissions were analyzed using a smoke meter and an exhaust gas analyzer. A scanning mobility particle sizer (SMPS) was utilized to measure the particle number and size distribution of the nano-sized particle matter. It revealed that the injected spray before BTDC 25° developed toward the piston bowl region, and then progressed along the piston wall. When the biodiesel spray was injected at BTDC 25°, the spray targeted the piston lib. In single-injection combustion, the combustion pressure and rate of heat release at an injection timing of BTDC 30° dramatically decreased. These characteristics influenced on the decrease of the indicated mean effective pressure (IMEP) and the increase of soot, HC, and CO emissions because of the incomplete combustion. The multiple-injection modes showed a higher IMEP than the single-injection mode. In addition, the pilot injection strategy represented a higher IMEP than the split injection mode. The analysis of exhaust emissions characteristics of the multiple-injection modes showed that a short injection interval induced a decrease in soot, HC, and CO emissions, while NOx emission increased. On the other hand, when the multiple-injection modes applied to the diesel engine, particles with large sizes were significantly decreased compared to single-injection combustion.

Keywords: Biodiesel; fuel; Combustion; pressure; In-cylinder; spray; behavior; Multiple-injection; strategy; Nitrogen; oxides; Soot (search for similar items in EconPapers)
Date: 2011
References: View complete reference list from CitEc
Citations: View citations in EconPapers (43)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306-2619(10)00293-X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:88:y:2011:i:1:p:88-98

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().