TY - JOUR
T1 - Analysis of Transition from HCCI to CI via PPC with Low Octane Gasoline Fuels Using Optical Diagnostics and Soot Particle Analysis
AU - An, Yanzhao
AU - Vallinayagam, R.
AU - Vedharaj, S.
AU - Masurier, Jean Baptiste
AU - Dawood, Alaaeldin
AU - Izadi Najafabadi, Mohammad
AU - Somers, Bart
AU - Johansson, Bengt
N1 - Publisher Copyright:
Copyright © 2017 SAE International.
PY - 2017
Y1 - 2017
N2 - In-cylinder visualization, combustion stratification, and engine-out particulate matter (PM) emissions were investigated in an optical engine fueled with Haltermann straight-run naphtha fuel and corresponding surrogate fuel. The combustion mode was transited from homogeneous charge compression ignition (HCCI) to conventional compression ignition (CI) via partially premixed combustion (PPC). Single injection strategy with the change of start of injection (SOI) from early to late injections was employed. The high-speed color camera was used to capture the in-cylinder combustion images. The combustion stratification was analyzed based on the natural luminosity of the combustion images. The regulated emission of unburned hydrocarbon (UHC), carbon monoxide (CO) and nitrogen oxides (NOX) were measured to evaluate the combustion efficiency together with the in-cylinder rate of heat release. Soot mass concentration was measured and linked with the combustion stratification and the integrated red channel intensity of the high-speed images for the soot emissions. The nucleation nanoscale particle number and the particle size distribution were sampled to understand the effect of combustion mode switch.
AB - In-cylinder visualization, combustion stratification, and engine-out particulate matter (PM) emissions were investigated in an optical engine fueled with Haltermann straight-run naphtha fuel and corresponding surrogate fuel. The combustion mode was transited from homogeneous charge compression ignition (HCCI) to conventional compression ignition (CI) via partially premixed combustion (PPC). Single injection strategy with the change of start of injection (SOI) from early to late injections was employed. The high-speed color camera was used to capture the in-cylinder combustion images. The combustion stratification was analyzed based on the natural luminosity of the combustion images. The regulated emission of unburned hydrocarbon (UHC), carbon monoxide (CO) and nitrogen oxides (NOX) were measured to evaluate the combustion efficiency together with the in-cylinder rate of heat release. Soot mass concentration was measured and linked with the combustion stratification and the integrated red channel intensity of the high-speed images for the soot emissions. The nucleation nanoscale particle number and the particle size distribution were sampled to understand the effect of combustion mode switch.
UR - http://www.scopus.com/inward/record.url?scp=85030867030&partnerID=8YFLogxK
U2 - 10.4271/2017-01-2403
DO - 10.4271/2017-01-2403
M3 - Conference article
AN - SCOPUS:85030867030
SN - 0148-7191
VL - 2017-October
JO - SAE Technical Papers
JF - SAE Technical Papers
T2 - SAE 2017 International Powertrains, Fuels and Lubricants Meeting, FFL 2017
Y2 - 15 October 2017 through 19 October 2017
ER -