Patent ID: 11959414
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  Y | IPC F

Claim 9:
10. A gaseous fuel engine system comprising:
a fuel system including a gaseous hydrogen fuel supply, and a gaseous hydrogen fuel admission valve;
an engine coupled to the fuel system and including an engine housing having a combustion cylinder formed therein, and a piston movable within the combustion cylinder between a top-dead-center position and a bottom-dead-center position, and the piston including a combustion face having a piston outer rim surface extending circumferentially around a combustion bowl, and a center cone within the combustion bowl having a cone surface extending between a cone peak centered on a piston center axis and a combustion bowl floor;
an igniter having formed therein a combustion prechamber and outlets fluidly connecting the combustion prechamber to the combustion cylinder, and including spark electrodes forming a spark gap within the combustion prechamber; and
the outlets being spaced circumferentially around the piston center axis and oriented, when the piston is at the top-dead-center position, to direct combustion gases of an ignition charge from the combustion prechamber in paths from the outlets that each advance both radially outward and axially downward from the igniter into contact with the cone surface.