Active pre-combustion chamber structure of gas engine

The utility model discloses an active pre-combustion chamber structure of a gas engine. The pre-combustion chamber comprises a pre-combustion chamber connecting part and a pre-combustion chamber nozzle which are fixedly mounted on a cylinder cover, a mounting cavity for mounting a spark plug is formed in the pre-combustion chamber connecting part; the nozzle is communicated with an inner cavity ofthe pre-combustion chamber nozzle; the device further comprises a micro-jet fuel gas source, a micro-jet gas inlet pipeline and a micro-jet fuel gas valve. A micro-injection gas channel is arranged in the pre-combustion chamber connecting portion and communicated with an inner cavity of the pre-combustion chamber nozzle, the downstream end of the micro-injection gas inlet pipeline is fixedly connected to the pre-combustion chamber connecting portion and communicated with the micro-injection gas channel, and the upstream end of the micro-injection gas inlet pipeline is connected with the micro-injection gas source thr