This study was carried out to propose an engine which has low emission and high efficiency by using radical induced injection method with rapid combustion of ultra lean mixture. A prechamber diesel engine was reconstructed to a SPI type gasoline engin...
This study was carried out to propose an engine which has low emission and high efficiency by using radical induced injection method with rapid combustion of ultra lean mixture. A prechamber diesel engine was reconstructed to a SPI type gasoline engine which can control the injection duration and spark timing. In this study, the volume, orifice diameter and number of subchamber were used as experiment parameter. In this study, the P-Θ diagram as a function of the volume, orifice diameter and number of the subchamber was obtained, and the results of the diagrams were compared with one of SPI engine. As results of experiment study, the reconstruction of a base engine was successfully completed, and the ratio of orifice area and subchamber volume should be optimized in subchamber design of a radical engine. Also, the improvement of the engine efficiency can be expected, because the efficiency of the radical induced injection engine with rapid combustion is higher than the SPI engine.