A method of combusting gaseous fuel in a main combustion chamber of an internal combustion engine , the method comprising: injecting gaseous fuel into the main combustion chamber through a plurality of injector orifices to mix with air in the main combustion chamber, the internal combustion engine comprising a prechamber having a central jet aperture in fluid communication between an interior of the prechamber and the main combustion chamber, where the plurality of injector orifices includes a first subset of fuel outlet nozzles oriented to direct fuel in a converging trajectory that converges on a point directly below the central jet aperture in the main combustion chamber, the gaseous fuel being received in the main combustion chamber in a trajectory that crosses the central jet aperture, and a second subset (321, 721, 821 1121) of fuel outlet nozzles oriented to direct fuel in a radial direction; flowing, during compression of the main combustion chamber, mixed gaseous fuel and air into the prechamber though the central jet aperture that is in fluid communication between an interior of the prechamber and the main combustion chamber, the compression passively flowing the mixed gaseous fuel and air; igniting, in the prechamber, the mixed gaseous fuel and air ingested into the prechamber from the main combustion chamber; and expelling ignited gaseous fuel and air from the prechamber through the central jet aperture and into the main combustion chamber as a flaming jet. injecting gaseous fuel into the main combustion chamber through a plurality of injector orifices to mix with air in the main combustion chamber, the internal combustion engine comprising a prechamber having a central jet aperture in fluid communication between an interior of the prechamber and the main combustion chamber, where the plurality of injector orifices includes a first subset of fuel outlet nozzles oriented to direct fuel in a converging trajectory that converges on a point directly below the central jet aperture in the main combustion chamber, the gaseous fuel being received in the main combustion chamber in a trajectory that crosses the central jet aperture, and a second subset (321, 721, 821 1121) of fuel outlet nozzles oriented to direct fuel in a radial direction; a first subset of fuel outlet nozzles oriented to direct fuel in a converging trajectory that converges on a point directly below the central jet aperture in the main combustion chamber, the gaseous fuel being received in the main combustion chamber in a trajectory that crosses the central jet aperture, and a second subset (321, 721, 821 1121) of fuel outlet nozzles oriented to direct fuel in a radial direction; flowing, during compression of the main combustion chamber, mixed gaseous fuel and air into the prechamber though the central jet aperture that is in fluid communication between an interior of the prechamber and the main combustion chamber, the compression passively flowing the mixed gaseous fuel and air; igniting, in the prechamber, the mixed gaseous fuel and air ingested into the prechamber from the main combustion chamber; and expelling ignited gaseous fuel and air from the prechamber through the central jet aperture and into the main combustion chamber as a flaming jet. <EOS>