CN201766286U - Lug boss type precious metal spark plug - Google Patents
Lug boss type precious metal spark plug Download PDFInfo
- Publication number
- CN201766286U CN201766286U CN201020219945XU CN201020219945U CN201766286U CN 201766286 U CN201766286 U CN 201766286U CN 201020219945X U CN201020219945X U CN 201020219945XU CN 201020219945 U CN201020219945 U CN 201020219945U CN 201766286 U CN201766286 U CN 201766286U
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- spark plug
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- boss
- precious metal
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Abstract
The utility model relates to a lug boss type precious metal spark plug which comprises a wiring screw rod, an insulator, a shell, a center electrode and a lateral electrode, wherein a layer of precious metal is arranged at the ignition end of the center electrode; and the spark plug is characterized in that a circular lug boss is formed on the lateral electrode in the position corresponding to the ignition end of the center electrode, a platinum metal layer is welded on the lug boss, the precious metal is directly molten on the lateral electrode matrix to form a metallurgical bonding layer in virtue of laser after resistance welding, the metallurgical bonding layer flows towards the top end of the lug boss in the stamping method to form a sparking end surface of the electrode, and the problems of ignitability and long service life are further solved. The spark plug has the advantages of low cost, no polarity effect, good flame inhibition effect and low ignition voltage; the spark plug is suitable for the higher compression ratio, is reliable in ignition of the supercharged engine and wide in range of air-fuel ratio of the engine, is adaptable to lean combustion, is good in cold start performance, reduces the shaking of the engine and has more stable operation; and since the service life of the spark plug can reach 100,000 kilometers, the cost of the spark plug is greatly reduced.
Description
Technical field
The utility model relates to a kind of spark plug, particularly a kind of boss type noble metal spark plug.
Background technology
The existing common spark-plug side electrode face relative with central electrode is flat, for the life-span of improving spark plug is welded noble metals such as platinum on lateral electrode, though the life-span improves, but ignition performance since platinum in the form of sheets thickness have only about 0.2mm, almost with lateral electrode at grade, the heat of flame nuclear is very easily absorbed by lateral electrode behind the plug ignition, be unfavorable for growing up of flame nuclear, the ignition quality that shows as spark plug aspect engine ignition is not very good, and the flame arrest effect of lateral electrode is not resolved.Adopt the method for 2 spark plugs of series connection on same coil windings for the most of ignition system of modern gasoline machine, terminals of the spark plug of two series connection are negative polarity, another spark plug binding post must be a positive polarity, because lateral electrode is a tabular, terminals are the igniting demand voltage height of this spark plug of positive polarity, because the demand voltage difference of two spark plugs, so always there is the life-span of a spark plug different with ablation, this spark plug is easier generation flashover when anxious acceleration and supercharging.Commercially available spark-plug side electrode firing tip is exactly the lateral electrode base metal, and the little not fire-resistant flower of diameter is ablated, and spark plug is short useful life.As commercially available spark plug at pin, central electrode adopts the noble metal of 0.6-0.7mm column to be welded on the end face of central electrode, on the lateral electrode with the corresponding position of central electrode also weld diameter 0.6-0.7mm, column noble metal about height 0.8mm, but welding one column noble metal technology difficulty is very big on this spark-plug side electrode, because the local spot welding just, difficult quality guarantee, because the column structure noble metal consumption on the lateral electrode is big, the cost of spark plug is very high on the other hand.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned defective, and a kind of simple in structure, long service life, low, the nonpolarity effect of cost, the good boss type noble metal spark plug that flame arrest effect, ignition voltage are low, cold start-up is good are provided.
The technical solution of the utility model: be that existing spark plug is improved, promptly to improving with the lateral electrode of central electrode firing tip opposite position, at the boss of lateral electrode firing tip by the formation of squeeze side electrode matrix metal, on this boss, be welded with the platy layer noble metal, solved ignition quality and long-life problem.
This boss type noble metal spark plug, comprise wiring screw rod, insulator, housing, central electrode and lateral electrode, the central electrode firing tip has one deck noble metal, it is characterized in that having on the lateral electrode of described and central electrode firing tip opposite position a boss that forms by squeeze side electrode matrix metal, the diameter of this boss is 1.0-2.0mm, be welded with a layer of precious metal on this boss, the diameter of this layer of precious metal is 0.4-1.5mm, and thickness is 0.15-0.5mm.Described boss be shaped as circle, or quadrangle, or hexagon, or other shape.Layer of precious metal on the described boss is the platinum layer, or the platinum alloy layer, or the iridium alloy layer, or the platinum-nickel alloys layer, or the platinum palladium iraurita alloy-layer.
Noble metal on the boss is by after the resistance welded, directly be melted in by laser and form a kind of metallurgical binding layer on the lateral electrode matrix, by the method for punching press, the precious metals metallurgy binder course flows to the top of boss, form the arcing end face of electrode, reach long-life purpose.
The utility model compared with prior art, and is simple in structure, cost is low, nonpolarity effect, good flame arrest effect, long service life, and ignition voltage is low, be suitable for and higher compression ratio, the engine with supercharger reliable ignition, engine air-fuel ratio haves a wide reach, and adapts to lean burn, cold start-up is better,-30 degree start, and reduce the shake of engine, move more steady, spark plug life can reach 100,000 kilometers, with the equal life-span of two platinums; With respect to present saving noble metal 30%-50%, reduced the cost of spark plug widely at the pin spark plug.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model A portion structure for amplifying schematic diagram;
Among the figure: 1-wiring screw rod, 2-insulator, 3-housing, 4-central electrode, 5-lateral electrode, 6-boss, 7-layer of precious metal, 8-center layer of precious metal.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of boss type noble metal spark plug, comprise wiring screw rod 1, insulator 2, housing 3, central electrode 4 and lateral electrode 5, nickel copper-clad central electrode 4 firing tips have a center platinum layer 8, it is characterized in that having on the lateral electrode 5 of described and central electrode 4 firing tip opposite positions a round boss 6 that forms by squeeze side electrode matrix metal, the diameter of this boss 6 is 1.0-2.0mm, on this boss 6, be welded with a layer of precious metal 7, the diameter of this layer of precious metal 7 is 0.4-1.5mm, and thickness is 0.15-0.5mm.Layer of precious metal 7 on the described boss 6 is platinum layer (a platinum weld tabs).Noble metal on the boss is by after the resistance welded, directly be melted in by laser and form a kind of metallurgical binding layer on the lateral electrode matrix, by the method for punching press, the precious metals metallurgy binder course flows to the top of boss, form the arcing end face of electrode, reach long-life purpose.
Claims (3)
1. boss type noble metal spark plug, comprise wiring screw rod (1), insulator (2), housing (3), central electrode (4) and lateral electrode (5), central electrode (4) firing tip has a center layer of precious metal (8), it is characterized in that having on the lateral electrode (5) of described and central electrode (4) firing tip opposite position a boss (6) that forms by squeeze side electrode matrix metal, the diameter of this boss (6) is 1.0-2.0mm, on this boss (6), be welded with a layer of precious metal (7), the diameter of this layer of precious metal (7) is 0.4-1.5mm, and thickness is 0.15-0.5mm.
2. boss type noble metal spark plug as claimed in claim 1 is characterized in that the circle that is shaped as of described boss (6), or quadrangle, or hexagon.
3. boss type noble metal spark plug as claimed in claim 1 is characterized in that the layer of precious metal (7) on the described boss (6) is the platinum layer, or the platinum alloy layer, or the iridium alloy layer, or the platinum-nickel alloys layer, or the platinum palladium iraurita alloy-layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020219945XU CN201766286U (en) | 2010-06-09 | 2010-06-09 | Lug boss type precious metal spark plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020219945XU CN201766286U (en) | 2010-06-09 | 2010-06-09 | Lug boss type precious metal spark plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201766286U true CN201766286U (en) | 2011-03-16 |
Family
ID=43718893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020219945XU Expired - Lifetime CN201766286U (en) | 2010-06-09 | 2010-06-09 | Lug boss type precious metal spark plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201766286U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108475900A (en) * | 2016-01-22 | 2018-08-31 | 费德罗-莫格尔有限责任公司 | Corona igniter with airtight combustion seal on insulator internal diameter |
-
2010
- 2010-06-09 CN CN201020219945XU patent/CN201766286U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108475900A (en) * | 2016-01-22 | 2018-08-31 | 费德罗-莫格尔有限责任公司 | Corona igniter with airtight combustion seal on insulator internal diameter |
| CN108475900B (en) * | 2016-01-22 | 2020-10-27 | 天纳克股份有限公司 | Corona igniter with airtight combustion seal on inner diameter of insulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110316 |