A STUDY OF 2-PHASE INJECTOR PERFORMANCE FOR DIRECT-INJECTION STRATIFIED-CHARGE ENGINES

The application of direct-injection stratified-charge (DISC) engines h as been limited by the unsatisfactory atomization performance of exist ing fuel injectors, although if has great possibilities for improved f uel economy and low emissions through lean combustion. it two-phase in jector for DISC engines was developed, which produced a good-quality s pray. Injector performance was checked to investigate the spray struct ure and the optimal conditions in terms of design variables and operat ing parameters. This air-assisted injector exhibited stable behavior a t speeds up to 6000 rpm and produced a finely atomized spray of 14.9 m u m in Sauter mean diameter.