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

Claim 15:
16. The prechamber spark plug of claim 1, wherein the thermally enhanced prechamber cap is made from a multi-piece assembly that includes a first preformed cup, a second preformed cup or sleeve, and a third preformed cup, the second preformed cup or sleeve is sandwiched between the first and third preformed cups and includes the at least one insert segment and the at least one thermal segment;
when the multi-piece assembly is formed into the thermally enhanced prechamber cap, the first and third preformed cups are formed into the plurality of layers of the main body and the second preformed cup or sleeve is formed into the thermally conductive core.