Gasoline Engine Performance with Laser-induced Breakdown Ignition under Inert Gas Dilution Condition

Abstract

An internal combustion engine with laser breakdown ignition was operated under inert gas and exhaust gas dilution, and the influence of increased dilution rate on engine performance and emissions was clarified. As a result of this experiment, operating range was expanded in proportion to specific heat ratio of inert gas and exhaust gas. And at high dilution rates, the gasoline engine operation was more stable with laser-induced breakdown ignition than with conventional spark ignition, since the IMEP was higher and the COVIMEP was lower with laser ignition.