Method and tooling for making an insulator for a condition sensing spark plug
AssigneeFederal-Mogul Ignition Company
InventorsPaul William Phillips, William J. Walker, Jr., Michael E. Saccoccia
Life of this patent
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Abstract
Methods of making an insulator for a condition sensing spark plug and tooling that can be used to perform the various methods, the tooling and methods involving machining one or more channels in the insulator body. The machined channels can be used to accommodate one or more wires from a sensing, display, or processing device. In one particular example, the wires are thermocouple wires used to sense temperature in an internal combustion engine while the spark plug is in use. The methods and tooling may result in channels that are formed more precisely, economically, and efficiently.
Claims9
A method of making an insulator for a condition sensing spark plug, comprising the steps of:
- forming an insulator body from ceramic materials, wherein the insulator body includes a nose portion, a terminal portion, an intermediate portion between the nose portion and the terminal portion, and an axial bore extending an axial length of the insulator body;
- and
- machining at least one channel along the axial bore of the insulator body, wherein the channel accommodates a wire for the condition sensing spark plug.
Dependencies are inferred from the claim text.