This method is used for smaller gas engines. In this system, whenever the engine starts running at higher speed, some explosions are missed or omitted. This is done with the help of governor in which the inlet valve of fuel is closed and the explosions are omitted till the engine speed reaches its normal value. The disadvantage of this method is that there is uneven turning moment due to missing of explosions and requires heavy flywheel to overcome the uneven turning moment.
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