WO2004040723A1 - Electric spark plug - Google Patents
Electric spark plug Download PDFInfo
- Publication number
- WO2004040723A1 WO2004040723A1 PCT/KR2003/002060 KR0302060W WO2004040723A1 WO 2004040723 A1 WO2004040723 A1 WO 2004040723A1 KR 0302060 W KR0302060 W KR 0302060W WO 2004040723 A1 WO2004040723 A1 WO 2004040723A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spark plug
- electric spark
- discharge
- cylinder
- electrodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/28—Sparking plugs characterised by features of the electrodes or insulation having spherically shaped electrodes, e.g. ball-shaped
Definitions
- the present invention relates to an electric spark plug for use in an ignition device which burns fuel in cylinders of a gasoline engine.
- a conventional ignition plug called an electric spark plug has a central plug and a ground plug both of which electrodes are shaped to be electrically discharged on a plate- to-plate electric discharge basis.
- an electric field becomes unequally distributed, and the electric field is concentrated on a finite protrusion of the end of the electrode.
- a discharge voltage becomes high and an ignition time is delayed according to severe wear of the electrodes, to thereby cause a decreased engine power output.
- the electric spark plug are greatly influenced by circumstances of the cylinder, the life of the electric spark plug is reduced to thereby shorten a replacement period thereof. Disclosure of the Invention
- an object of the present invention to provide an electric spark plug in which leading ends of a central electrode and a ground electrode which are installed in an electric spark plug body are spherically-shaped or dome-shaped electrodes to accomplish an approximate point charge and equal electric field, and to make an interval between the two electrodes smaller than diameter of the sphere of the electrode. Accordingly, a concentrative spark discharge occurs due to an electrical path breakdown between the two spherical electrodes without a partial discharge. As a result, the spark flames become strong, to thereby burn fuel in the cylinder quickly and increase power of the engine. Also, the electrodes are not nearly worn, to thereby raise no discharge voltage increase and discharge time delay. Also, a replacement period of spark plugs becomes remarkably long due to having no performance deterioration.
- an electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body having a central electrode and a ground electrode both of which leading ends are formed of spherically shaped electrodes, respectively.
- an electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body having a central electrode and a ground electrode both of which leading ends are formed of dome-shaped electrodes, respectively.
- an electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body having a central electrode and a ground electrode either of which leading ends is formed of a spherically-shaped electrode or a dome-shaped electrode.
- FIG. 1 is a perspective view of an entire electric spark plug according to the present invention
- FIG. 2 is a perspective view of essential portions of the electric spark plug according to another embodiment of the present invention
- FIG. 3 is a perspective view of essential portions of the electric spark plug according to still another embodiment of the present invention.
- FIG. 4 is a perspective view of essential portions of the electric spark plug according to yet another embodiment of the present invention
- FIG. 5 is a perspective view of essential portions of the electric spark plug according to yet still another embodiment of the present invention.
- FIG. 6 is a perspective view of essential portions of the electric spark plug according to a further embodiment of the present invention.
- Each diameter of the spherical electrodes 10a and 11a is larger than an interval between the two electrodes 10 and 11. Accordingly, a voltage applied between the two electrodes 10 and 11 reveals a point charge effect, and a concentrative spark discharge occurs due to an electrical path breakdown between the two spherical electrodes 10a and 11a without a partial discharge.
- FIG. 2 is a perspective view of essential portions of the electric spark plug according to another embodiment of the present invention.
- a spherical electrode 10a is formed only in the leading end of a central electrode 10 in an electric spark plug body 101, and a ground electrode 11 is formed of a plate-type electrode as in the conventional art.
- the configuration of FIG. 2 also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
- FIG. 3 is a perspective view of essential portions of the electric spark plug according to still another embodiment of the present invention.
- a spherical electrode 11a is formed only in the leading end of a ground electrode 11 in an electric spark plug body 201, and a central electrode 10 is formed of a plate-type electrode as in the conventional art.
- This FIG. 3 configuration also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
- FIG. 4 is a perspective view of essential portions of the electric spark plug according to yet another embodiment of the present invention.
- a doe-shaped electrode lib is formed only in the leading end of a ground electrode 11 in an electric spark plug body 301, and a central electrode 10 is formed of a plate-type electrode as in the conventional art .
- This FIG. 4 configuration also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
- FIG. 5 is a perspective view of essential portions of the electric spark plug according to still yet another embodiment of the present invention.
- a dome-shaped electrode 10b is formed only in the leading end of a central electrode 10 in an electric spark plug body 401, and a ground electrode 11 is formed of a plate-type electrode as in the conventional art.
- This FIG. 5 configuration also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
- FIG. 6 is a perspective view of essential portions of the electric spark plug according to a further embodiment of the present invention.
- an electric spark plug body 501 includes a central electrode 10 and a ground electrode 11 both of which leading ends are formed of dome-shaped electrodes 10b and lib, respectively.
- This FIG. 6 configuration also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
- an electric spark plug according to the present invention is coupled to a cylinder head of a gasoline engine to ignite fuel.
- leading ends of a central electrode 10 and a ground electrode 11 are spherically shaped electrodes 10a and 11a, and an interval between the two electrodes is smaller than the diameter in the sphere of each electrode, a concentrative spark discharge occurs due to an electrical path breakdown between the two spherical electrodes 10a and 11a without a partial discharge.
- the spark flames become strong, to thereby burn fuel in the cylinder quickly and increase power of the engine.
- the electrodes of the electric spark plug are not influenced by circumstances in the cylinder, the spark plug has not nearly suffered from the circumstances in the cylinder. Also, the electrodes are not nearly worn, to thereby raise no discharge voltage increase and discharge time delay. Also, a replacement period of spark plugs becomes remarkably long.
- the electric spark plug according to the present invention can be used in a cylinder head of a fuel engine such as a gasoline engine. Since the electrodes are not nearly worn, to thereby raise no discharge voltage increase and discharge time delay, and a replacement period of spark plugs becomes remarkably long, the present invention contributes an industrial development.
Landscapes
- Spark Plugs (AREA)
Abstract
An electric spark plug is used for igniting fuel in a cylinder of a gasoline engine. Preferably, the electric spark plug is electrically discharged on a sphere-to-sphere electrical discharge basis, in which leading ends of a central electrode (10) and a ground electrode (11) which are installed in an electric spark plug body (1) are spherically shaped electrodes (10a, 11a). Accordingly, a concentrative spark discharge occurs due to an electrical path breakdown between the two spherical electrodes (10a, 11a) without a partial discharge. As a result, the spark flames become strong, to thereby burn fuel in the cylinder quickly and increase power of the engine. Also, the electrodes are not nearly worn, to thereby raise no discharge voltage increase and discharge time delay. Also, a replacement period of spark plugs becomes remarkably long. The spark plug has not nearly suffered from the circumstances in the cylinder.
Description
ELECTRIC SPARK PLUG
Technical Field
The present invention relates to an electric spark plug for use in an ignition device which burns fuel in cylinders of a gasoline engine.
Background Art
A conventional ignition plug called an electric spark plug has a central plug and a ground plug both of which electrodes are shaped to be electrically discharged on a plate- to-plate electric discharge basis. When a certain voltage is applied between the two electrodes, an electric field becomes unequally distributed, and the electric field is concentrated on a finite protrusion of the end of the electrode. As a result, since a pre-discharge starts from the finite protrusion, an electric spark is not so strong to ignite and burn fuel strongly. Also, a discharge voltage becomes high and an ignition time is delayed according to severe wear of the electrodes, to thereby cause a decreased engine power output. Also, since the electric spark plug are greatly influenced by circumstances of the cylinder, the life of the electric spark plug is reduced to thereby shorten a replacement period thereof.
Disclosure of the Invention
To solve the above problems, it is an object of the present invention to provide an electric spark plug in which leading ends of a central electrode and a ground electrode which are installed in an electric spark plug body are spherically-shaped or dome-shaped electrodes to accomplish an approximate point charge and equal electric field, and to make an interval between the two electrodes smaller than diameter of the sphere of the electrode. Accordingly, a concentrative spark discharge occurs due to an electrical path breakdown between the two spherical electrodes without a partial discharge. As a result, the spark flames become strong, to thereby burn fuel in the cylinder quickly and increase power of the engine. Also, the electrodes are not nearly worn, to thereby raise no discharge voltage increase and discharge time delay. Also, a replacement period of spark plugs becomes remarkably long due to having no performance deterioration.
To accomplish the above object of the present invention, according to an aspect of the present invention, there is provided an electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body having a central electrode and a ground electrode both of which leading ends are formed of spherically shaped electrodes, respectively.
To accomplish the above object of the present invention, according to another aspect of the present invention, there is also provided an electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body having a central electrode and a ground electrode both of which leading ends are formed of dome-shaped electrodes, respectively.
To accomplish the above object of the present invention, according to still another aspect of the present invention, there is also provided an electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body having a central electrode and a ground electrode either of which leading ends is formed of a spherically-shaped electrode or a dome-shaped electrode.
Brief Description of the Drawings The above and other object and advantages of the present invention will become more apparent by describing the preferred embodiment thereof in more detail with reference to the accompanying drawings in which:
FIG. 1 is a perspective view of an entire electric spark plug according to the present invention;
FIG. 2 is a perspective view of essential portions of the electric spark plug according to another embodiment of the present invention;
FIG. 3 is a perspective view of essential portions of the electric spark plug according to still another embodiment of the present invention;
FIG. 4 is a perspective view of essential portions of the electric spark plug according to yet another embodiment of the present invention; 'FIG. 5 is a perspective view of essential portions of the electric spark plug according to yet still another embodiment of the present invention; and
FIG. 6 is a perspective view of essential portions of the electric spark plug according to a further embodiment of the present invention.
Best Mode for Carrying out the Invention
Hereinbelow, an electric spark plug according to the present invention will be described with reference to the accompanying drawings. The like or same elements are assigned the like or same reference numerals all over the drawings, for convenience of explanation.
As shown in FIG. 1, an electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder
includes an electric spark plug body 1 having a central electrode 10 and a ground electrode 11 both of which leading ends are formed of spherically shaped electrodes 10a and 11a, respectively. Each diameter of the spherical electrodes 10a and 11a is larger than an interval between the two electrodes 10 and 11. Accordingly, a voltage applied between the two electrodes 10 and 11 reveals a point charge effect, and a concentrative spark discharge occurs due to an electrical path breakdown between the two spherical electrodes 10a and 11a without a partial discharge. As a result, the spark flames become strong, and the electrodes are not nearly worn, to thereby provide a sphere-to- sphere electric spark plug nearly free from influences of circumstances in the cylinder. FIG. 2 is a perspective view of essential portions of the electric spark plug according to another embodiment of the present invention. In FIG. 2, a spherical electrode 10a is formed only in the leading end of a central electrode 10 in an electric spark plug body 101, and a ground electrode 11 is formed of a plate-type electrode as in the conventional art. The configuration of FIG. 2 also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
FIG. 3 is a perspective view of essential portions of the electric spark plug according to still another embodiment of the present invention. In FIG. 3, a spherical electrode 11a is
formed only in the leading end of a ground electrode 11 in an electric spark plug body 201, and a central electrode 10 is formed of a plate-type electrode as in the conventional art. This FIG. 3 configuration also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
FIG. 4 is a perspective view of essential portions of the electric spark plug according to yet another embodiment of the present invention. In FIG. 4, a doe-shaped electrode lib is formed only in the leading end of a ground electrode 11 in an electric spark plug body 301, and a central electrode 10 is formed of a plate-type electrode as in the conventional art . This FIG. 4 configuration also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
FIG. 5 is a perspective view of essential portions of the electric spark plug according to still yet another embodiment of the present invention. In FIG. 5, a dome-shaped electrode 10b is formed only in the leading end of a central electrode 10 in an electric spark plug body 401, and a ground electrode 11 is formed of a plate-type electrode as in the conventional art. This FIG. 5 configuration also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1.
FIG. 6 is a perspective view of essential portions of the electric spark plug according to a further embodiment of the present invention. In FIG. 6, an electric spark plug body 501 includes a central electrode 10 and a ground electrode 11 both
of which leading ends are formed of dome-shaped electrodes 10b and lib, respectively. This FIG. 6 configuration also provides an effect similar to that of a sphere-to-sphere electric spark plug of FIG. 1. As described above, an electric spark plug according to the present invention is coupled to a cylinder head of a gasoline engine to ignite fuel. Since leading ends of a central electrode 10 and a ground electrode 11 are spherically shaped electrodes 10a and 11a, and an interval between the two electrodes is smaller than the diameter in the sphere of each electrode, a concentrative spark discharge occurs due to an electrical path breakdown between the two spherical electrodes 10a and 11a without a partial discharge. As a result, the spark flames become strong, to thereby burn fuel in the cylinder quickly and increase power of the engine. Also, since the electrodes of the electric spark plug are not influenced by circumstances in the cylinder, the spark plug has not nearly suffered from the circumstances in the cylinder. Also, the electrodes are not nearly worn, to thereby raise no discharge voltage increase and discharge time delay. Also, a replacement period of spark plugs becomes remarkably long.
Industrial Applicability
As described above, the electric spark plug according to the present invention can be used in a cylinder head of a fuel
engine such as a gasoline engine. Since the electrodes are not nearly worn, to thereby raise no discharge voltage increase and discharge time delay, and a replacement period of spark plugs becomes remarkably long, the present invention contributes an industrial development.
As described above, the present invention has been described with respect to particularly preferred embodiments. However, the present invention is not limited to the above embodiments, and it is possible for one who has an ordinary skill in the art to make various modifications and variations, without departing off the spirit of the present invention.
Claims
1. An n electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body (1) having a central electrode (10) and a ground electrode (11) both of which leading ends are formed of spherically shaped electrodes (10a, 11a) , respectively.
2. An electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body (1) having a central electrode (10) and a ground electrode (11) both of which leading ends are formed of dome-shaped electrodes (10b, lib), respectively.
3. An electric spark plug which is coupled to a cylinder head in a fuel engine to raise an electric spark discharge and thus burn fuel in the cylinder, the electric spark plug comprising: an electric spark plug body (1) having a central electrode (10) and a ground electrode (11) either of which leading ends is formed of a spherically-shaped electrode (10a, 11a) or a dome-shaped electrode (10b, lib) .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003265003A AU2003265003A1 (en) | 2002-11-01 | 2003-10-07 | Electric spark plug |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20020032708U KR200305163Y1 (en) | 2002-11-01 | 2002-11-01 | An electrode spark plug |
| KR20-2002-0032708 | 2002-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004040723A1 true WO2004040723A1 (en) | 2004-05-13 |
Family
ID=32464387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2003/002060 Ceased WO2004040723A1 (en) | 2002-11-01 | 2003-10-07 | Electric spark plug |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR200305163Y1 (en) |
| AU (1) | AU2003265003A1 (en) |
| WO (1) | WO2004040723A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2921766A1 (en) * | 2007-09-27 | 2009-04-03 | Philippe Pierre Marie Sonnet | IGNITION CANDLE COMPRISING AT LEAST ONE ELECTRODE WITH ELLIPSOIDAL END |
| EP2036174A4 (en) * | 2006-06-19 | 2011-12-07 | Federal Mogul Corp | Small diameter/long reach spark plug with rimmed hemispherical sparking tip |
| CN103794987A (en) * | 2014-01-20 | 2014-05-14 | 陈三明 | Sparking plug of gasoline engine |
| CN111370999A (en) * | 2020-02-26 | 2020-07-03 | 上海交通大学 | Spark plug with double umbrella-shaped electrodes |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101765262B1 (en) | 2015-06-25 | 2017-08-07 | 한국산업안전보건공단 | One-Body Type Spark Plug for Explosion Test |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3940649A (en) * | 1974-07-09 | 1976-02-24 | Berstler Francis E | Spark plug construction |
| JPS5542286U (en) * | 1978-09-14 | 1980-03-18 | ||
| KR970072576A (en) * | 1996-04-30 | 1997-11-07 | 양재신 | Spark plug for automobile |
-
2002
- 2002-11-01 KR KR20020032708U patent/KR200305163Y1/en not_active Ceased
-
2003
- 2003-10-07 AU AU2003265003A patent/AU2003265003A1/en not_active Abandoned
- 2003-10-07 WO PCT/KR2003/002060 patent/WO2004040723A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3940649A (en) * | 1974-07-09 | 1976-02-24 | Berstler Francis E | Spark plug construction |
| JPS5542286U (en) * | 1978-09-14 | 1980-03-18 | ||
| KR970072576A (en) * | 1996-04-30 | 1997-11-07 | 양재신 | Spark plug for automobile |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2036174A4 (en) * | 2006-06-19 | 2011-12-07 | Federal Mogul Corp | Small diameter/long reach spark plug with rimmed hemispherical sparking tip |
| FR2921766A1 (en) * | 2007-09-27 | 2009-04-03 | Philippe Pierre Marie Sonnet | IGNITION CANDLE COMPRISING AT LEAST ONE ELECTRODE WITH ELLIPSOIDAL END |
| WO2009074747A3 (en) * | 2007-09-27 | 2009-08-06 | Philippe Pierre Marie Sonnet | Sparkplug with ellipsoidal or elliptical electrode |
| CN103794987A (en) * | 2014-01-20 | 2014-05-14 | 陈三明 | Sparking plug of gasoline engine |
| CN111370999A (en) * | 2020-02-26 | 2020-07-03 | 上海交通大学 | Spark plug with double umbrella-shaped electrodes |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003265003A1 (en) | 2004-05-25 |
| KR200305163Y1 (en) | 2003-02-25 |
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