A homogeneous charge (early injection) is preferred for the higher load conditions during operation with stratified charge the engine runs with un-throttled conditions and engine load is adjusted by fuel/air equivalence ratio. A homogeneous charge is used at full load conditions. To supply homogeneous charge, fuel is injected during the intake stroke. During operation with homogeneous charge the adjustment of engine load is done by throttling. Figure.3 shows the injection of homogeneous charge in engine cylinder.