Abstract
For realizing a premixed charge compression ignition (PCCI) engine, the effects of bio-ethanol blend oil and exhaust gas recirculation (EGR) on PM-NOx trade-off have been investigated in a single cylinder direct injection diesel engine with the compression ratio of 17.8. In the present experiment, the ethanol blend ratio and the EGR ratio were varied focusing on ignition delay, premixed combustion, diffusive combustion, smoke, NOx and the thermal efficiency. Very low levels of 1.5 [g/kWh] NOx and 0.02 [g/kWh] PM, which is close to the 2009 emission standards imposed on heavy duty diesel engines in Japan, were achieved without deterioration of the thermal efficiency in the PCCI engine operated with the 50% ethanol blend fuel and the EGR ratio of 0.2. It is found that this improvement can be achieved by formation of the premixed charge condition resulting from a longer ignition delay. A marked increase in ignition delay is due to blending ethanol with low cetane number and large latent heat, and due to lowering in-cylinder gas temperature on compression stroke based on the EGR. It is noticed that smoke can be reduced even by increasing the EGR ratio under a highly premixed condition.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Ishida, M., Tagai, T. and Ueki, H. (2004). Effects of gasoline/gas-oil blend on smoke reduction in a diesel engine. Reports of the Faculty of Engineering, Nagasaki University 34,63, 9–15.
Ishida, M., Jung, S., Ueki, H. and Sakaguchi, D. (2006). Effect of exhaust gas recirculation on combustion in a HCCI engine fuelled with DME/Natural gas. Int. Conf. 2nd VAFSEP, Paper No. 133, 61–66.
Ishida, M., Jung, S. H., Ueki, H. and Sakaguchi, D. (2007). Combustion characteristics of HCCI engines fuelled with natural gas and DME. 25th CIMAC, Paper No. 171, 1–15.
Ishida, M., Jung, S. H., Ueki, H. and Sakaguchi, D. (2008). Experimental analysis of thermal efficiency improvement due to high EGR ratio in HCCI engines fuelled with DME and natural gas. COMODIA, 289–296.
Jung, S., Ishida, M., Ueki, H. and Onitsuka, S. (2005). Ignition and combustion characteristics of DME premixed with natural gas in a HCCI engine. Internal Combustion Engine Symp. 2005, Paper No. 20056086.
Jung, S. H., Ishida, M., Ueki, H. and Sakaguchi, D. (2007). Ignition characteristics of methanol and natural-gas in a HCCI engine assisted by DME. SAE Paper No. 2007-01-1863, 1–6.
Kamio, J., Kurotani, T., Kuzuoka, K., Kubo, Y., Taniguchi, H. and Hashimoto, K. (2007). Study on HCCI-SI combustion using fuels containing ethanol. SAE Paper No. 2007-01-4051.
Li, T., Izumi, H., Shudo, T., Ogawa, H. and Okabe, Y. (2007). Characterization of low temperature diesel combustion with various dilution gases. SAE Paper No. 2007-01-0126.
Li, T., Suzuki, M. and Ogawa, H. (2008). Effects of incylinder temperature and fuel-air mixing on smokeless low temperature diesel combustion. COMODIA, Paper No. DE1-1, 135–142.
Miyamoto, N., Chikahisa, T., Murayama, T. and Sawyer, R. (1985). Description and analysis of diesel engine rate of combustion and performance using Wiebe’s functions. SAE Paper No. 850107.
Ogawa, H., Li, T., Miyamoto, N., Kido, S. and Shimizu, H. (2006). Dependence of ultra-high EGR and low temperature diesel combustion on fuel injection conditions and compression ratio. SAE Paper No. 2006-01-3386.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Jung, S., Ishida, M., Yamamoto, S. et al. Enhancement of NOx-PM trade-off in a diesel engine adopting bio-ethanol and EGR. Int.J Automot. Technol. 11, 611–616 (2010). https://doi.org/10.1007/s12239-010-0073-6
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12239-010-0073-6