Numerical Study of the Effects of Lambda and Injection Timing on RCCI Combustion Mode

Reactivity Controlled Compression Ignition (RCCI), which is a low temperature combustion mode based on the principle of working with dual fuel, has attracted attention researchers in recent years due to its advantages such as high thermal efficiency, NOx and soot emissions, controllability combustion. In this study, effects injection timing lambda RCCI were investigated numerically by validating experimental data Converge CFD software. A four-cylinder, four-stroke gasoline direct-injection engine compression ratio 9.2 was used at an speed 1000 rpm. The maximum cylinder pressure also increased advanced while advanced. highest peak obtained SOI=-50°CA aTDC, lowest SOI=-25°CA aTDC. Similarly, HRR value acquired 213 J/°CA It been observed that decreases, increases, advances. addition, heat release rises decrease value. rate 77.91 λ=1.2. results show have great influence phase can be controlled these parameters.