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

Claim 0:
1. A prechamber spark plug, comprising:
a center electrode assembly having a center electrode;
an insulator having an axial bore for at least partially accommodating the center electrode assembly;
a shell having an axial bore for at least partially accommodating the insulator;
a ground electrode opposing the center electrode across a spark gap; and
a thermally enhanced prechamber cap forming a prechamber that at least partially surrounds the spark gap, wherein the thermally enhanced prechamber cap includes a main body, a thermally conductive core, and at least one opening that allows the prechamber to communicate with a main combustion chamber;
the main body includes a plurality of layers that correspond to interior and exterior surfaces of the thermally enhanced prechamber cap; and
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 the insert segment is arranged such that the opening in the thermally enhanced prechamber cap extends through the insert segment.