Patent ID: 7798118

Claim:
A method for installation of a flame cone of a pre-ignition system for ignition of a fuel/gas mixture within a combustion chamber of an internal combustion engine, comprising the steps of: (a) providing a flame cone having an inboard end and an opposite outboard open end, (b) defining adjacent said inboard end of said flame cone at least one exit channel adapted to provide fluid communication of a flame front from a location within said flame cone through said exit channel and toward a target location internally of the combustion chamber of the internal combustion engine; (c) providing a first indicia on said outboard end of said flame cone, said first indicia being visually observable from a location external of the internal combustion engine and further indicative of the physical location and attitude of said at least one exit channel; (d) providing multiple further indicia on said outboard end of said flame cone at spaced apart locations about the outer periphery of said outboard end of said flame cone and being visible for a location external of the internal combustion engine, (e) providing a circumferential shoulder about the outer circumference of said flame cone at a location intermediate said inboard and outboard ends of said flame cone, said shoulder extending radially outward of said outer circumference of said flame cone; (f) defining an elongated throughbore through the head of the internal combustion engine, and throughbore having an open inboard end which opens internally of the combustion chamber of the internal combustion engine and an open outboard end opening to the environmental external of the head, whereby said throughbore defines a passageway between said combustion chamber and the environment external of the head, (g) defining a circumferential shoulder internally of said throughbore at a location intermediate said inboard and outboard ends of said throughbore, said shoulder extending radially inwardly of said throughbore a distance sufficient to engage and limit the extent of insertion of said flame cone into said throughbore; (h) providing a reference marker on said head adjacent the outboard open end of said throughbore, said reference marker being visually exposed from a location external of said internal combustion engine; (i) inserting said flame cone into said throughbore via said outboard open end of said throughbore to the extent that said shoulder of said flame cone sealingly engages said shoulder within said throughbore, (j) if said first indicia is not aligned with said reference marker upon completion of step (i), removing said flame cone from said throughbore, (k) altering the depth of which said flame cone will extend into said throughbore and effect a sealing relationship with said throughbore and said first indicia also will be aligned with said reference marker.