Title: Comparative investigation of emissions and combustion characteristics between ethanol-biodiesel-diesel blends and diesel fuel in a passenger car diesel engine

Authors: Kibong Choi; Hyun Gu Roh; Chang Sik Lee

Addresses: School of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea ' Department of Mechanical and Automotive Engineering, Induk University, 14 Choansan-gil, Nowon-gu, Seoul 01878, Republic of Korea ' School of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea

Abstract: This study investigated the comparison of emissions and performance characteristics between ethanol-biodiesel-diesel blends and diesel fuel in a passenger car diesel engine. In order to analyse the effect of ethanol-biodiesel blends, the combustion and emission reduction characteristics of a four-cylinder diesel engine with common-rail direct injection system were investigated under the various injection and blended ratios. The experimental results showed that the combustion pressure of ethanol-biodiesel-diesel blended fuels slightly increased than that of convention diesel fuel at higher load condition, while the coefficient of variance of the combustion pressure (COV_imep) showed almost the similar values. Under low-load conditions, the effects of ethanol-biodiesel blending to conventional diesel fuel on exhaust emissions showed that brake specific CO emission (BS-CO) and BS-HC emissions remarkably increased while BS-NOx emissions decreased as ethanol blending ratio increased. Under high load conditions, BS-CO, BS-HC and BS-NOx emissions slightly increased as ethanol blending ratio increased. On the other hand, the BS-Soot emissions were reduced by more than 50% in all conditions. [Received: October 16, 2015; Accepted: June 8, 2016]

Keywords: combustion characteristics; emissions characteristics; alternative fuels; ethanol blends.

DOI: 10.1504/IJOGCT.2017.086347

International Journal of Oil, Gas and Coal Technology, 2017 Vol.16 No.2, pp.203 - 216

Received: 16 Oct 2015
Accepted: 08 Jun 2016
Published online: 04 Sep 2017 *

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