Patent ID: 7922551

Claim:
A method to extend the life of a pre-chamber spark plug comprising the steps of: providing a metal shell; arranging electrodes within the metal shell in a divergent configuration; providing a volume behind a gap of the electrodes for burnt products from a previous ignition cycle; and configuring an endcap with a plurality of induction holes to generate non-magnetic flow field forces that act upon an electrical arc within a pre-combustion chamber with sufficient force to cause the electrical arc to move, thereby distributing electrical energy over an area of the electrode surface greater than the area over which energy would be distributed in the absence of the non-magnetic flow field; wherein the endcap is mounted to the metal shell such that the endcap and metal shell substantially define the pre-combustion chamber; and wherein each of the induction holes has a hole axis that is substantially perpendicular to a longitudinal axis of the pre-chamber spark plug.