Superior Output Homogeneous Charge AF:13~24 rque Intake Stroke Injection Ultra-lean Combustion Stratified Charge AF:30-40 Compression Stroke (A/F EGR included: 35-55) Iniection Engine Speed〔rpm) Fig. 4-1 Two combustion modes of the GDiFig. 4-1 Two combustion modes of the GDI