International Journal

Title87. Heechang Oh, Choongsik Bae, “Effect of split injection in a spray guided DISI engine under the lean-stratified operation”, Proc. IMechE, Part D, Journal of Automobile Engineering, vol. 228, no. 10, pp.1232-1244, 2014 (SCI; IF 0.645, citation : 0)

An experimental study was carried out to investigate the effects of injection timing on spray and combustion characteristics in a spray guided direct injection spark ignition (DISI) engine under lean stratified operation. In-cylinder pressure analysis, exhaust emissions measurement, and visualization of combustion and spray were applied. Combustion in a stratified DISI engine was found to have both lean premixed and mixing controlled flame characteristics. The stratified mixture characteristic for the injection timing was verified as a dominant factor of the flame characteristics. For the early injection timing, non-luminous flame and low combustion efficiency were observed due to the over-mixed mixture formation. On the contrary, luminous sooting flame was shown at the late injection timing because of under-mixed mixture formation. In addition, smoke emission and incomplete combustion products were increased at the late injection timing due to increased locally rich area of the mixture. On the other hand, nitrogen oxides (NOx) emissions were decreased while indicated mean effective pressure (IMEP) was increased as the injection timing was retarded. The retarded combustion phasing was verified as the reason in this observation.

Previous86. Sangwook Han, Hyunchul Kim, and Choongsik Bae, “Strategy for Mode Transition between Low Temperature Combustion and Conventional Combustion in a Diesel Engine”, SAE International Journal of Engines, vol. 6, No. 3, p1706-1715 (Paper No. 2013-24-0058), 2013. (citation : 0)
Next88. Hojjat Shabgard, Saeid Kheradmand and Choongsik Bae, “Numerical simulation of fuel trapped in crevice of the pilot injection in a homogeneous charge compression ignition engine”, Proc. IMechE, Part D, Journal of Automobile Engineering, 2014 (SCI; IF 0.645, ciation : 0)
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