Effect of fuel injection rate on the performance of a gasoline/biodiesel RCCI engine during the starting process
LUO Yihao
TAN Yusong
CHEN Haifu
WANG Weifa
LI Jing
YANG Wenming
Abstract：Based on three-dimensional numerical simulations,the effects of injection rate shapes with different boot lengths and intake temperatures on the combustion and emission characteristics of a gasoline/biodiesel reactivity controlled compression ignition(RCCI)engine during the starting process are investigated.The results indicate that increasing the boot length increases the late-stage injection rate promotes the atomization and mixing of biodiesel,thereby increases in-cylinder pressure,peak heat release rate,and indicates mean effective pressure while reduces CO emissions,which leads to increased NO emissions.Under the low intake temperature condition,employing a long boot length can improve combustion efficiency and prevent misfire.A higher intake temperature helps improve combustion stability,mitigates the influence of injection rate shape,and significantly reduces CO emission.
Keywords：gasolinebiodieselRCCI engineinjection rate shapestarting process
Publication Date：2025-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 38-45 )