Patent ID: 11909178
Assignee: FEDERAL-MOGUL IGNITION GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 17:
18. A method for manufacturing a thermally enhanced prechamber cap for a prechamber spark plug, the method comprising the steps of:
providing a multi-piece assembly that includes a main body piece and a thermally conductive core piece;
forming the multi-piece assembly into the thermally enhanced prechamber cap, wherein the main body piece is formed into a main body and the thermally conductive core piece is formed into a thermally conductive core,
the main body includes a plurality of layers that correspond to interior and exterior surfaces of the thermally enhanced prechamber cap;
the thermally conductive core is sandwiched between the plurality of layers of the main body and includes a layer with at least one thermal segment and at least one insert segment, wherein the thermal segment includes at least one cutout in which the insert segment is located; and

forming at least one opening in the thermally enhanced prechamber cap so as to allow for communication between a prechamber and a main combustion chamber, wherein the insert segment is aligned with the opening such that the opening extends through the insert segment.