Combustion characteristics and transient soot
generation of methanol-hydrogenated catalytic
biodiesel(HCB) in partially premixed combustion(PPC) low temperature combustion
mode were investigated by using an optical engine and twocolor testing method. The results indicate that the peak cylinder
pressures of M0(100% HCB) and M15(15% methanol, 25% n-octanol,
and 60% HCB) increase first and then decrease as the timing of direct injection
advances. The methanol blending reduces the activity of blended fuels, which
results in the lagging of the combustion phases of M15 compared with that of M0
under the same direct injection moment. In the early stage of PPC combustion
mode, the flame temperature of M15 is lower than that of M0 due to the heat
absorption of methanol evaporation, but with the development of combustion, the
full combustion of M15 not only makes its flame temperature gradually higher
than that of M0, but also significantly reduces the generation of carbon soot
in the late combustion phase due to the higher oxygen content of M15 and the
more homogeneous distribution of the fuel.
SHAO Zhuang, LI Weimin, CHEN Ji, ZHAO Xinqiang, ZHOU Xiucheng, MA Xiaohan
. Characteristics of Soot Formation in Optical Engine
using Methanol-HCB under PPC Low-Temperature Combustion
Mode[J]. Vehicle Engine, 2025
, 0(2)
: 9
.
DOI: 10.3969/j.issn.1001-2222.2025.02.002
