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US 2018/0019577 A1Published application
Remanufactured sparkplug and sparkplug remanufacturing method
AssigneeCaterpillar Inc.
InventorsMichael Gerstner, Timothy Graham, Dianqi Fang
Life of this patent
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Abstract
A remanufactured sparkplug includes a housing, an insulator within the housing, and first and second electrodes. The first electrode and the second electrode form a plurality of spark gaps at a plurality of new spark gap locations, and a plurality of spark-induced erosions are formed in the second electrode at a plurality of former spark gap locations that are circumferentially offset from the new spark gap locations.
Claims20
A remanufactured sparkplug comprising:
- a housing defining a center axis;
- an insulator positioned at least partially within the housing;
- a first electrode supported by the insulator, and including a plurality of electrode prongs spaced circumferentially about the center axis and each including an electrode tip;
- and
- a second electrode including an electrode surface extending about the center axis and radially spaced from each of the plurality of electrode tips to form a plurality of spark gaps at a plurality of new spark gap locations;
- the electrode surface further having formed therein a plurality of spark-induced erosions at a plurality of former spark gap locations that are circumferentially offset from the plurality of new spark gap locations.
3 more elements
A method of remanufacturing a used sparkplug comprising:
- receiving a sparkplug removed from service in an engine and including a first electrode having a plurality of prongs including a plurality of electrode tips forming spark gaps with a second electrode;
- disassembling the sparkplug such that an angular orientation of the first electrode about a center axis of the sparkplug relative to the second electrode can be adjusted;
- adjusting the angular orientation such that the electrode tips form spark gaps with the second electrode at a plurality of new spark gap locations offset from a plurality of former spark gap locations of the second electrode;
- and
- reassembling the sparkplug.
2 more elements
A remanufactured cylinder head assembly comprising:
- a cylinder head structured to couple with an engine block in an internal combustion engine system, and including a fire side surface and a second surface opposite the fire side surface, and having a bore formed therein and communicating between the fire side surface and the second surface;
- a remanufactured sparkplug positioned within the bore, the remanufactured sparkplug defining a center axis and including a first electrode having a plurality of prongs spaced circumferentially about the center axis and each including an electrode tip, and a second electrode having an electrode surface forming a plurality of spark gaps with the electrode tips of the plurality of electrode prongs;
- and
- the spark gaps being formed at a plurality of new spark gap locations, and the electrode surface further having formed therein a plurality of spark-induced erosions at a plurality of former spark gap locations offset from the plurality of new spark gap locations.
1 more element
Dependencies are inferred from the claim text.