BigPatents India

A combustion control apparatus for a spark ignition type 2-cycle internal combustion engine 1 wherein fresh air in a combustion chamber can be self-ignited at least in a low load operation region, characterized in that the exhaust path opening ratio adjustment means is driven, when, upon development of a stopping signal for the internal combustion engine, the internal combustion engine speed is higher than a predetermined speed which is higher than an idling speed, so that the exhaust path opening ratio may be higher than an opening ratio with which self-ignition is impossible, and that, in case the internal combustion engine stopping signal is developed, when the internal combustion engine speed drops until it becomes lower than the predetermined speed or is lower than the predetermined speed, the exhaust path opening ratio adjustment means is driven so that the exhaust path opening ratio may be controlled to an opening ratio with which ordinary combustion is possible.