EP0635918A2 - Dispositif à décharge et système d'allumage à intervalle en série utilisant un dispositif à décharge - Google Patents

Dispositif à décharge et système d'allumage à intervalle en série utilisant un dispositif à décharge Download PDF

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Publication number
EP0635918A2
EP0635918A2 EP94117046A EP94117046A EP0635918A2 EP 0635918 A2 EP0635918 A2 EP 0635918A2 EP 94117046 A EP94117046 A EP 94117046A EP 94117046 A EP94117046 A EP 94117046A EP 0635918 A2 EP0635918 A2 EP 0635918A2
Authority
EP
European Patent Office
Prior art keywords
discharge
conductive member
electrode
tube
discharge device
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.)
Withdrawn
Application number
EP94117046A
Other languages
German (de)
English (en)
Other versions
EP0635918A3 (fr
Inventor
Takeshi Sato
Tetsuya Mitani
Mikio Hanzawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
Original Assignee
Yazaki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yazaki Corp filed Critical Yazaki Corp
Priority claimed from EP90113166A external-priority patent/EP0407976B1/fr
Publication of EP0635918A2 publication Critical patent/EP0635918A2/fr
Publication of EP0635918A3 publication Critical patent/EP0635918A3/fr
Withdrawn legal-status Critical Current

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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
    • H01T1/00—Details of spark gaps
    • H01T1/20—Means for starting arc or facilitating ignition of spark gap
    • H01T1/22—Means for starting arc or facilitating ignition of spark gap by the shape or the composition of the electrodes
    • 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
    • H01T13/46—Sparking plugs having two or more spark gaps
    • H01T13/462—Sparking plugs having two or more spark gaps in series connection
    • H01T13/465—Sparking plugs having two or more spark gaps in series connection one spark gap being incorporated in the sparking plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

Definitions

  • the present invention relates to a discharge device suitable for use in an ignition system with a series gap for automotive engines, and an ignition system with a series gap using the discharge device.
  • Fig. 22 shows a discharge tube 1 used in for example an arrester for various kinds of electrical machinery and apparatus.
  • this discharge tube 1 the open sections at both ends of an insulation tube 2 as a sealed tube formed of ceramics or other are closed with a pair of electrode plates 4, 4 having discharge electrode sections 3, 3 which are disposed opposingly.
  • the insulation tube 2 is sealed a specific inactive gas.
  • the discharge tube 1 Since the discharge tube 1 is placed and connected on a specific electric circuit of an arrester for example, there is arranged an electric element having a specific potential or a metal at a ground potential. If, in this manner, the discharge tube 1 is installed close to an electric element, an electric field formed around the electric element or other will affect the discharge tube 1, resulting in changed discharge voltage characteristics of the discharge tube 1.
  • the ignition system C with series gap as shown in Fig. 24, has the spark-tension cable 6 connected to the high-voltage distribution side.
  • a connection terminal 9 designed to fit on a terminal 8 of the spark plug 5 and a high-voltage distribution terminal 10 connected to the end of the high-tension cable 6.
  • the discharge tube 1 having the discharge electrodes 3, 3 are mounted.
  • the ignition system C of the above constitution is mounted in a recess section 12 formed in an engine cylinder head or a cylinder head cover 11, and attached on the spark plug 5 which is screwed into the cylinder head side.
  • numeral 13 denotes a metal pipe which has the purpose of guiding the ignition system C and also protecting the ignition system C from fouling by engine oil.
  • the metal pipe 13 which guides the ignition system C is located close thereto.
  • the metal pipe 13 is at the same potential as the ground potential of the cylinder head or the cylinder head cover 11, the presence of the metal pipe 13 at this ground potential changes the field strength around the discharge tube 1, resulting in changed discharge voltage characteristics of the discharge tube 1.
  • Such a change in the discharge voltage characteristics is likely to shift the whole ignition timing of the spark plug 5, and accordingly there is the problem that it is impossible to obtain specific automotive engine performance in which the accurate control of the spark plug ignition timing is required to obtain a high engine performance.
  • the present invention has been accomplished in an attempt to resolve the problems mentioned above and has an object to provide a discharge device which can be protected from the effect of the electric field of surrounding electric elements or other and an ignition system with series gap capable of improving engine operation performance.
  • the discharge device of the present invention which has a pair of electrodes opposing disposed in a sealed tube, is characterized by providing a conductive member enclosing one of the electrodes in the sealed tube.
  • the ignition system with series gap of the present invention is an ignition system having a built-in discharge device provided with a series gap, with one end connected to the center electrode side of the spark plug and with the other end connected to the high-tension cable side extending from the high-voltage distribution side.
  • a discharge device having a conductive member which encloses one of the electrodes of the sealed tube, and one of the electrodes enclosed with the conductive member of this discharge device works as a cathode.
  • the ignition system with series gap which includes a discharge tube provided with the series gap with one end connected to the center electrode side of the spark plug and the other end connected to the high-tension cable side extending from the high-voltage distribution side, there is provided a conductive member enclosing the cathode side of the discharge device to be installed in the casing in which the discharge device is to be installed.
  • a conductive member enclosing one of electrodes in the sealed tube and, therefore, when a minus voltage is applied to the electrode around which the conductive member is installed, to discharge electrons from this electrode (cathode), the conductive member works to prevent the effect of the surrounding electric field for the purpose of stabilizing the electric field in the vicinity of the cathode side in the discharge device, thereby enabling stabilizing the discharge voltage characteristics of the discharge device.
  • a discharge device provided with a conductive member which encloses one of the electrodes of the sealed tube is used as the discharge device installed as the series gap, and one of the electrodes enclosed with the conductive member of the discharge device operates as the cathode. Therefore, when the minus voltage is applied to the discharge member from the high-tension cable, the conductive member can prevent the effect of the surrounding electric field, thereby stabilizing the electric field around the cathode side in the discharge device and getting rid of a change in the discharge voltage characteristics of the discharge device for the purpose of preventing the overall shift of the ignition timing and enhancing engine performance.
  • Figs. 1A and 1B show a first embodiment of a discharge tube 1 used as a discharge device according to the present invention.
  • the hollow cylindrical insulation tube 2 as a sealed tube produced of ceramics is sealed at open sections at both ends with a pair of metal electrode plates 4a and 4b having the opposing discharge electrodes 3a and 3b, and in the insulation tube 2 is filled a specific inactive gas, such as argon gas, through a sealing pipe not illustrated.
  • a specific inactive gas such as argon gas
  • a nearly cap-like conductive member 14 used as a back electrode is mounted on the outer periphery of the discharge tube 1 as if to surround the electrode plate 4a and a discharge electrode section 3a thereof.
  • This conductive member 14 is designed to be electrically connected to the electrode plate 4a by a specific means which is not illustrated.
  • the conductive member 14 is produced of for example a metal sheet, and the inner surface of the conductive member 14 and the outer surface of the discharge tube 1 may be either in close contact with or apart from each other with a specific amount of spacing formed therebetween.
  • the discharge tube 1 is used so that the high minus voltage is applied to one electrode plate 4a side enclosed by the conductive member 14, and that the other electrode plate 4b side will be the ground side. Therefore, under the using conditions of the discharge device, the electrode plate 4a side operates as a cathode at which electrons are emitted by a discharge phenomenon, while the other electrode plate 4b side functions as an anode.
  • the conductive member 14 used around the discharge tube 1 to surround the electrode plate 4a on the cathode side and the discharge electrode section 3a, and the conductive member 14 and the electrode plate 4a are electrically connected; therefore, if the discharge electrode section 3a and the conductive member 14 are of the same potential and there is provided an electric element (not illustrated) having a specific potential in the vicinity of the discharge tube 1, forming a specific electric field around the electric element and other, a stabilized electric field can be formed between the discharge electrode section 3a and the discharge electrode 3b on the opposite side without disturbing the electric field around the cathode side in the discharge tube 1, thereby providing a stabilized discharge phenomenon and also stabilized discharge voltage characteristics between these discharge electrode sections 3a and 3b.
  • Table 1 This is clear also from experimental data shown in Table 1.
  • the firing potential of 16.5 - 17.5 kV drops to 14 - 15 kV when the electric element or other for example at the ground potential approaches, a voltage fluctuation reaching as great as 2 kV.
  • the firing potential of 10 - 20 kV varies only to 19.5 - 20.5 kV when the ground body approaches, the range of this fluctuation therefore being merely 0.5 kV.
  • the conductive member 14 which is at the same potential as the discharge electrode section 3a and protects the vicinity of the cathode side in the discharge tube 1 from the effect of the ambient electric field.
  • the fluctuation of the firing potential becomes extremely little, thereby enabling the stabilization of the discharge voltage characteristics.
  • the voltage fluctuation can be improved by the ground body within the range that, as shown by an alternate long and two short dashes line in Fig. 1A, the lower end 14a of the conductive member 14 installed over the electrode plate 4a on the cathode side fully reaches the vicinity of the upper end of the discharge electrode section 3a on the cathode side.
  • Fig. 2 shows a second embodiment of the discharge tube 1 according to the present invention, wherein a metallized band 15 of specific width is formed on the outer peripheral surface of one open end of the insulation tube 2 at the time of metallizing the open end of the insulation tube 2.
  • a metallized band 15 of specific width is formed on the outer peripheral surface of one open end of the insulation tube 2 at the time of metallizing the open end of the insulation tube 2.
  • this embodiment also, it is possible to prevent the effect of a surrounding electric field and to form the conductive member simultaneously with metallizing, thereby reducing the number of processes and a manufacturing cost.
  • the insulation distance from the lower end 14a of the conductive member to the end face 4b' of the electrode plate 4b on the anode side to be joined to the insulated tube 2 decreases as shown in Fig. 3, and accordingly it is likely that there occurs a so-called surface discharge along the outside wall surface of the insulation tube 2 across this insulation distance.
  • Forming the collar section 16 as described above makes substantially longer the tube (insulation distance) along the outer surface of the insulation tube 2 from the joining end face 4a' joining the cathode-side electrode plate 4a to the insulation tube 2 to the joining end face 4b' of the anode-side electrode plate, making it difficult to produce the surface discharge. Also, moulding the electrically insulating material 17 dispenses with a part, such as an air stratum on the outside surface of the insulation tube 2, which induces the surface discharge, thus enabling the prevention of the surface discharge.
  • the discharge electrode 3a on the cathode side is formed extremely short and at the same time the discharge electrode section 3b on the anode side is increased in length by an amount equal to the decreased amount of the discharge electrode 3a. Also, there is formed for example a metallized band 15 extremely short but wide just enough to surround the short discharge electrode section 3a, in order that the metallized band 15 and the electrode plate 4a having the discharge electrode section 3a thus formed are electrically connected.
  • the inactive gas is filled and a gas filling pipe is attached to one of the electrode plates 4 for sealing the open end sections of the insulation tube 2 comprising the discharge tube 1.
  • This gas filling pipe is coaxially extending into the discharge electrode section 3 of the electrode plate 4 on which the gas filling pipe is attached, with a pipe end being open into the insulation tube 2.
  • the discharge electrode section 3b is formed extremely long on the anode side, the provision of the gas filling pipe 18 on the discharge electrode section 3b side can open a pipe end 18a, which is formed by bending the forward end portion of the gas filling pipe, to the peripheral surface of the discharge electrode section 3b.
  • the gas filling pipe 18 does not pass through to the discharge face 3b'' at the top end of the discharge electrode 3b, and therefore the discharge face 3b' at the top end of the discharge electrode 3b can be increased in surface area, thereby diminishing the influence of electrode consumption for the purpose of prolonging the life of the discharge tube 1.
  • a sixth embodiment shown in Fig. 6 sets forth the cathode-side discharge electrode 3a of the fifth embodiment which is further decreased in length, so that the discharge electrode 3a does almost or completely not project out of the cathode-side electrode plate 4a.
  • the electrode plate 4a works as a conductive member which functions as a back electrode described above, displaying an effect approximately similar to that of the back electrode particularly even when no back electrode is provided. As no back electrode is in use, it is possible to lower the cost of the whole body of the discharge tube 1 and also to prevent the surface discharge described above.
  • the cathode side electrode plate 4a which acts as the above-mentioned back electrode may be made substantially in the form of a cap having a slight protuberance formed in its inner surface thereof to act as discharge electrode section 3a.
  • the eighth embodiment shown in Fig. 8 the discharge electrode is not in the protruding form, even in which case an approximately similar result to the back electrode is obtained and the surface discharge is prevented from being generated.
  • Fig. 9 shows a ninth embodiment of the discharge tube 1 according to the present invention, wherein the conductive member 14 used as the back electrode is provided with a plurality of cutouts 19 within the range that the lower end section 3a' of the discharge electrode 3a on the cathode side will never be affected by an ambient electric field.
  • the present invention it is possible to stabilize the discharge voltage characteristics between the discharge electrode sections 3a and 3b without disturbing the vicinity of the cathode side in the discharge tube 1 by the ambient electric field. Furthermore, as it is unnecessary to use the conductive member in the area the cutout section 19 is formed, it is possible to decrease materials and accordingly to reduce the manufacturing cost.
  • Fig. 10 shows a tenth embodiment of the discharge tube 1 according to the present invention, wherein continuous one turn of a metal wire 20 is electrically connected to the electrode plate 4a through a lead section 20a on the outer peripheral surface of the insulation tube 2 in a position slightly closer to the electrode plate 4a from the lower end 3a'' of the cathode-side discharge electrode section 3a.
  • the metal wire 20 functions as the conductive member used as what is called the back electrode, thus preventing the effect of the ambient electric field. Even when the ground boy is located nearly the firing potential of 20 - 20.5 kV varies only to 19 - 19.5 kV as shown in Table 1 given later on, its discharge voltage characteristics remaining stabilized. As the back electrode is composed merely of the metal wire 20, the discharge device can be produced at an extremely low cost.
  • This metal wire 20 should be installed slightly closer to the electrode plate 4a side than to the lower end 3a'' of the cathode-side discharge electrode section 3a. In this position the highest firing potential and the maximum effect thereof are obtainable as is clear from the relationship between the firing potential and the location of the metal wire shown in Fig. 11.
  • the metal wire 20 may be a discontinued one turn of metal wire having a plurality of discontinuities within the range that the lower end section 3a' of the cathode-side discharge electrode 3a will not be affected by the ambient electric field, or may have a plurality of turns of metal wire.
  • a metal wire 21 whose one end is connected to the cathode-side electrode plate 4a may be wound into a form of coil spring on the outer peripheral surface of the insulation tube 2.
  • Fig. 13 shows a twelfth embodiment of the discharge tube 1 according to the present invention.
  • a band-like conductive member 22 which surround the discharge electrode section 3a, extending from a position 1 to 2 mm apart from the joining end 4a' of the cathode-side electrode plate 4a which is joined to the insulation tube 2, to the lower end 3a'' of the discharge electrode section.
  • the conductive member 22 functions as the so-called back electrode to shut off the effect of the ambient electric field, fully displaying its effect particularly when the high minus voltage is applied to the cathode side of the discharge tube 1 (when the spacing is several millimeters or larger, the conductive member 22 can still show an effect as the back electrode though not fully).
  • the conductive member 22 there occurs, therefore, no disturbance by the conductive member 22 in the vicinity of the cathode side in the discharge tube 1, thereby enabling the stabilization of the discharge voltage characteristics between the discharge electrode sections 3a and 3b.
  • the manufacturing cost can be lowered further.
  • the conductive member described above may be either a conductive member 23 which is not continuous with a plurality of discontinuities as set forth in a thirteenth embodiment shown in Fig. 14 or a mesh-like conductive member 24 described in a fourteenth embodiment shown in Fig. 15. Furthermore, it is possible to provide a set of metal rings 25 put in a plurality of layers or a metal wire 26 in a form of coil spring, as described in fifteenth and sixteenth embodiments shown in Figs. 16 and 17 respectively.
  • Each of the conductive members described above in the first to sixteenth embodiments can be formed by varied processes, besides the above-mentioned, such as metal foiling, metallizing, conductive painting, evaporation coating, sputtering, etc.
  • the location of the conductive member is not limited to the outer peripheral section of the discharge tube 1, but may be the inner peripheral section of the discharge tube 1.
  • the installation of the conductive member on the inner periphery of the discharge tube 1 is likely to cause the surface discharge to occur inside of the discharge tube; it is, therefore, necessary to adopt some effective means for prevention of the surface discharge.
  • the conductive member may be embedded in a specific location in the wall of the insulation tube 2 at the stage of manufacture, not installed on the outer or inner periphery of the discharge tube 1.
  • the discharge tube 1 is given as one example of the discharge device with a pair of electrodes disposed opposingly with a specific discharge gap provided therebetween and sealed in a sealed tube, and with an inactive gas filled in this sealed tube, and that the discharge device of the present invention is not limited only to the discharge tube 1.
  • Table 1 given below shows, as a test data which shows the effect of the aforementioned conductive member, the values of firing potential of the discharge tube body of each of the embodiments, and the values of firing potential obtained when the ground body approaches, in comparison with conventional examples shown in Fig. 22.
  • Fig. 18 shows a first embodiment of the ignition system C with series gap which uses the discharge device 1 according to the present invention, wherein, in the plug cap 7 embedded in the metal pipe connected to the cylinder head or the cylinder head cover 11, there is installed the discharge tube 1 having the cap-shaped conductive member 14 as a back electrode which covers one electrode side 4a, 3a shown in Fig. 1A.
  • this discharge tube 1 is installed in such a manner that its one end provided with the conductive member 14 is connected to the high-tension cable side extending from the high-tension coil which produces the minus voltage, while the other end having no conductive member 14 is connected to the center electrode side of the spark plug.
  • the discharge device is adapted to be used such that one electrode side 4a, 3a of the discharge tube 1 will work as a cathode from which the electrons are emitted in the discharge phenomenon and the other electrode side 4b, 3b will work as the anode.
  • the discharge tube 1 functions as the series gap S provided in series with the spark plug, and the discharge voltage present across this series gap is maintained at a high value to a certain degree.
  • the voltage present in this series gap after discharge is applied to the spark plug all at once, thereby obtaining an ignition voltage necessary for the spark plug without being affected by a short circuit caused by carbon deposits on the spark plug.
  • the discharge tube 1 is used so that the cathode side 4a, 3a which emits the electrons in the discharge phenomenon may be covered with the conductive member 14, the discharge tube 1 will become free from a change in the electric field strength caused by the metal pipe 13 which is at ground potential, thereby enabling discharge stabilization.
  • the discharge tube 1 will become free from a change in the electric field strength caused by the metal pipe 13 which is at ground potential, thereby enabling discharge stabilization.
  • Fig. 19 shows a second embodiment of the ignition system C with a series gap according to the present invention.
  • the discharge tube 1 having the conductive member is not used, but the conductive member as the back electrode is mounted on the plug cap 7 side and the discharge tube 1 of prior art shown in Fig. 22 is employed.
  • a band-like conductive member 27 on the high-voltage distribution terminal 10 side connected to the high-tension cable 6 extending from the high-tension coil which produces the minus voltage such that the conductive member 27 covers one electrode section 4a, 3a of the discharge tube 1 installed inside of the plug cap 7.
  • This conductive member 27 is connected by a wire to the high-voltage distribution terminal 10 in order to maintain the same potential as the high-voltage distribution terminal 10 side.
  • high-voltage terminal 10 side to which the minus voltage is applied is the cathode
  • the connection terminal 9 connected to the center electrode of the spark plug is the anode.
  • the discharge tube 1 is not affected by any change in the electric field strength caused by the metal pipe 13 at the ground potential which guides and protects the plug cap 7, and it is possible to prevent the overall shift of the ignition timing by stabilizing the discharge voltage characteristics, thereby improving the engine operation performance.
  • numeral 28 denotes an electrical insulating moulded material of plastics or other for holding and fixing the discharge tube 1 within the plug cap 7.
  • the conductive member 27, as described above, must not be serial one but may have a plurality of discontinuities. Also, as stated in the third embodiment shown in Fig. 20, the coil spring-shaped metal wire 29 may be used. Furthermore, the effect of an ambient electric field can be fully prevented if the conductive member 27 is not electrically connected with the high-voltage terminal 10, and the conductive member 27 may be formed of various kinds of materials such as metal foil, metal mesh, conductive paint, etc.
  • the discharge device functioning as the series gap has been explained separately from the spark plug.
  • the present invention should not be limited to the aforementioned embodiments; the discharge device used as the series gap may be such a device formed integral with the plug built in the spark plug.
  • Table 2 gives a test data showing the effect of the ignition system C with a series gap having the conductive member, comparing a conventional example shown in Fig. 24 with the values of the firing potential of the assembly body with the discharge member 27 of the second embodiment both electrically connected and not electrically connected to the cathode side of the discharge tube 1, and the values of the firing potential with the ground body having approached them.
  • the conductive member since the conductive member is provided to substantially surround one of the electrodes of the sealed tube, the conductive member shuts off the effect of the ambient electric field to stabilize the electric field in the discharge device when the electrons are emitted from the cathode provided with the conductive member applied with the minus voltage, thus stabilizing the discharge voltage characteristics of the discharge device.
  • the ignition system with a series gap uses a discharge device having the conductive member which substantially surround one of the electrodes of the sealed tube, for a discharge device installed as a series gap in the engine cylinder, such that one of the electrons enclosed by conductive member will be a cathode.
  • the conductive member prevents the effect of the surrounding electric field in order to stabilize the electric field around the cathode side in the discharge device without a change in the discharge voltage characteristics of the discharge device, thereby preventing the overall shift of the ignition timing and accordingly further enhancing the engine performance.
  • the conductive member substantially surround the cathode section of the discharge device is installed in the casing in which the discharge device is to be installed as a series gap, the conductive member prevents the effect of the surrounding electric field and stabilize the electric field in the vicinity of the cathode side in the discharge device without affecting the discharge voltage characteristics of the discharge device, thereby preventing the overall shift of the ignition timing and further improving the engine performance.

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  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)
EP94117046A 1989-07-12 1990-07-10 Dispositif à décharge et système d'allumage à intervalle en série utilisant un dispositif à décharge. Withdrawn EP0635918A3 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP178074/89 1989-07-12
JP17807489 1989-07-12
JP268054/89 1989-10-17
JP26805489A JPH0697628B2 (ja) 1989-07-12 1989-10-17 シリーズギャップ付点火装置
EP90113166A EP0407976B1 (fr) 1989-07-12 1990-07-10 Dispositif de décharge et système d'allumage, comprenant un éclateur en série utilisant le dispositif de décharge

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP90113166A Division EP0407976B1 (fr) 1989-07-12 1990-07-10 Dispositif de décharge et système d'allumage, comprenant un éclateur en série utilisant le dispositif de décharge
EP90113166.4 Division 1990-07-10

Publications (2)

Publication Number Publication Date
EP0635918A2 true EP0635918A2 (fr) 1995-01-25
EP0635918A3 EP0635918A3 (fr) 1995-08-09

Family

ID=16042165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117046A Withdrawn EP0635918A3 (fr) 1989-07-12 1990-07-10 Dispositif à décharge et système d'allumage à intervalle en série utilisant un dispositif à décharge.

Country Status (2)

Country Link
EP (1) EP0635918A3 (fr)
JP (1) JPH0697628B2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2648292B2 (fr) † 2007-05-22 2023-07-26 Bourns, Inc. Tube à décharge de gaz

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06196249A (ja) * 1992-01-06 1994-07-15 Kaname Iketani ガソリンを燃料とする内燃機関のダブル点火方式点火栓一回路方式及び電気火花発生器
JPH0785840A (ja) * 1993-09-20 1995-03-31 Yazaki Corp ガス入り放電管
JPH07192841A (ja) * 1993-12-27 1995-07-28 Yazaki Corp 放電管

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1805752A (en) * 1929-04-02 1931-05-19 Henry O King Spark plug
US3702952A (en) * 1971-10-12 1972-11-14 Western Electric Co Gas tube surge protective device and method for making the device
US3878423A (en) * 1973-05-31 1975-04-15 Comtelco Uk Ltd Electrical surge arrestor having fail-safe properties
US4475055A (en) * 1982-01-28 1984-10-02 The United States Of America As Represented By The United States Department Of Energy Spark gap device for precise switching

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1805752A (en) * 1929-04-02 1931-05-19 Henry O King Spark plug
US3702952A (en) * 1971-10-12 1972-11-14 Western Electric Co Gas tube surge protective device and method for making the device
US3878423A (en) * 1973-05-31 1975-04-15 Comtelco Uk Ltd Electrical surge arrestor having fail-safe properties
US4475055A (en) * 1982-01-28 1984-10-02 The United States Of America As Represented By The United States Department Of Energy Spark gap device for precise switching

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2648292B2 (fr) † 2007-05-22 2023-07-26 Bourns, Inc. Tube à décharge de gaz

Also Published As

Publication number Publication date
JPH03141574A (ja) 1991-06-17
EP0635918A3 (fr) 1995-08-09
JPH0697628B2 (ja) 1994-11-30

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