DE202020105180U1 - Positive multipole multipole spark plug - Google Patents

Abstract

A positive multi-pole multi-pole spark plug characterized in that it comprises a metal case, a ceramic insulator, a center electrode, an electrode sheet and a wiring threaded rod; wherein the metal case has a structure with an upper opening and a lower opening, wherein an inner space of the metal case is fixedly provided with the ceramic insulator, the wiring screw rod is connected to the center electrode, the wiring screw rod and the center electrode each inside the ceramic insulator are arranged, wherein one end of the center electrode extends from the ceramic insulator and is firmly connected to the electrode sheet, wherein the electrode sheet has at least two electrodes, the electrodes are positioned over the metal housing, with a cavity between the ceramic insulator and the inner side wall of the metal housing is provided to form a heating chamber.

Description

TECHNICAL AREA

The present utility model relates to the field of spark plugs, and in particular to a positive multipole multi-pole spark plug.

STATE OF THE ART

Automobiles, motorcycles are the main means of transport of the present traffic, whereby the development of motor vehicles, especially in the urbanization trend, offers a platform and a basis for an increased pace of life and increased production efficiency. When the engine is said to be the heart of a vehicle, the spark plug is the beating part of the whole heart and the prerequisite and basis for ensuring the efficiency and quality of engine operation. A problem with the spark plug of the vehicle leads to practical problems such as the failure of the vehicle to start, the vibrations and the high fuel consumption when starting and running the engine, thereby affecting the functioning of the vehicle, and causing a rather negative deterioration in driving safety and comfort as well as ecological goals.

With reference to 1 , the spark plug which is now widely used in practice is a side electrode spark plug comprising a wiring threaded rod 1 , a ceramic insulator 2 , a metal case 3 , a side electrode 4th and a center electrode 5 . A side electrode 4th is to the top of the metal case 3 connected, the side electrode 4th is located above the center electrode 5 , and there is a gap between the two 6th , with the side electrode 4th is a negative electrode, and the center electrode 5 is a positive electrode. When the spark plug is working, the high voltage breaks down from the wiring threaded rod 1 through the center electrode 5 the fuel-air mixture to create a spark, with the current coming from the center electrode 5 the side electrode 4th reached, and reached ground through the spark plug housing and engine cylinder. The side electrode has a disadvantage: in use, there is a one-point ignition, poor ignition efficiency, insufficient fuel combustion and unreliable function, and carbon deposits are often generated which lead to failure of ignition of the spark plug.

On the basis of the technical problem described above, the applicant previously obtained a Chinese utility model called “an internally closed spark plug with external poles and a multi-pole ignition” (application number CN 200520057756.6 ) registered, which is granted with a utility model right. With reference to 2 such a spark plug comprises a metal housing 6th , a center electrode 7th , a cross-shaped electrode sheet 8th and a ceramic insulator 9 . The interior of the metal case 6th is with the center electrode 7th provided, the interior of the metal housing 6th with an insulating ceramic insulator 9 is tightly filled, the ceramic insulator 9 at the same time on the cross-shaped electrode sheet 8th and the center electrode 7th is applied. The poles of the center electrode 7th extend from the metal housing 6th out and are with a cross-shaped electrode sheet 8th welded, with an ignition on one of the upper surfaces of the metal case 1 corresponding position of the cross-shaped electrode sheet 8th can occur; the four poles of the cross-shaped electrode sheet 8th are positive electrodes, and the corresponding points on the top surface of the metal case 1 are negative electrodes. When the spark plug is working, the high voltage reaches from the center electrode 7th the cross-shaped electrode sheet 8th , breaks through the fuel-air mixture and generates a spark, with a current from several poles on the cross-shaped electrode sheet 8th to a plurality of corresponding points on the metal housing 6th achieved, with a multi-pole ignition is realized, and the deficiencies of the single-pole ignition of the prior art is overcome.

After more than ten years of continuous testing and verification on real vehicles by the applicant, it is found that the mileage of this positive multipolar spark plug 10,000 Does not exceed kilometers, the commercial value is small, and it is difficult to actually realize industrial use. After many tests and research into the cause, the following cause of the defect is found: under operating conditions in which the engine is idling or running at low speed, the fuel is insufficiently burned, with part of the unburned mixture due to the catalytic effect at high temperature and the Oxygen forms a light basic acid and a resinous gelatin, whereby the gelatin adheres to the surfaces of the spark plug and the parts connected to the combustion chamber, whereby these substances further form asphaltenes and tar substances, which are so-called carbon deposits, under the influence of high temperatures in the combustion chamber . Since the ceramic insulator of the positive multi-pole spark plug described above is hermetically constructed, the ceramic insulator fills the interior of the metal case, with the oil contamination and carbon deposits generated on the surface of the engine in a state where the engine is idling or running at low speed Collect the ceramic insulator, thereby preventing the Metal housing 6th and the cross-shaped electrode sheet 8th is facilitated to form a circuit ground, thereby appearing phenomena such as inability to ignite the spark plug and short working kilometers.

Furthermore, this positive multi-pole spark plug has another disadvantage: since the ceramic insulator is tight and there is no heat chamber (air chamber) in the spark plug, the calorific value of the spark plug is constant and cannot be adjusted, whereby the different heat value requirements of different engines cannot be met, especially for the geographical features of China in several latitudes, the calorific value requirements of the engine used in different latitudes are usually different (the outside temperature difference is large), thus the spark plugs of this type have a smaller area of application, which is unfavorable for a large area.

CONTENT OF THE PRESENT INVENTION

In order to overcome the disadvantages of the prior art, it is the object of the present utility model to provide a positive multi-pole spark plug which achieves multi-pole ignition by welding an electrode sheet with several electrodes to a center electrode, while at the same time by introducing the heating chamber in the metal housing preventing oil spill, which causes the metal case and electrode sheet to adhere, and circuit grounding.

• Eine positive mehrpolige Multipol-Zündkerze umfasst ein Metallgehäuse, einen Keramikisolator, eine Mittelelektrode, ein Elektrodenblech und eine Verdrahtung-Gewindestange; wobei das Metallgehäuse eine Struktur mit einer oberen Öffnung und einer unteren Öffnung aufweist, wobei ein Innenraum des Metallgehäuses fest mit dem Keramikisolator versehen ist, wobei die Verdrahtung-Gewindestange mit der Mittelelektrode verbunden ist, wobei die Verdrahtung-Gewindestange und die Mittelelektrode jeweils innerhalb des Keramikisolators angeordnet sind, wobei sich ein Ende der Mittelelektrode aus dem Keramikisolator erstreckt und mit dem Elektrodenblech fest verbunden ist, wobei das Elektrodenblech wenigstens zwei Elektroden aufweist, wobei die Elektroden über dem Metallgehäuse positioniert sind, wobei ein Hohlraum zwischen dem Keramikisolator und der inneren Seitenwand des Metallgehäuses vorgesehen ist, um eine Wärmekammer zu bilden.

The present utility model is implemented with the following technical solutions:

• A multi-pole positive spark plug comprises a metal case, a ceramic insulator, a center electrode, an electrode sheet, and a wiring threaded rod; wherein the metal case has a structure with an upper opening and a lower opening, wherein an inner space of the metal case is fixedly provided with the ceramic insulator, the wiring screw rod is connected to the center electrode, the wiring screw rod and the center electrode each inside the ceramic insulator are arranged, wherein one end of the center electrode extends from the ceramic insulator and is firmly connected to the electrode sheet, wherein the electrode sheet has at least two electrodes, the electrodes are positioned over the metal housing, with a cavity between the ceramic insulator and the inner side wall of the metal housing is provided to form a heating chamber.

In a development it is provided that each of the electrodes on the electrode sheet has at least two poles.

In a further development it is provided that the electrode sheet has the shape of a cross, the electrode sheet comprising four electrodes.

In a development it is provided that the gap between the two poles on the same electrode is not less than 0.3 mm.

In a further development it is provided that the heating chamber has an annular shape.

In a further development, it is provided that the electrode sheet is permanently welded to the center electrode.

In a further development it is provided that the ceramic insulator is an aluminum oxide ceramic insulator.

In a further development it is provided that the positive multipole multi-pole spark plug further comprises an electrical resistor, the electrical resistor being connected between the wiring threaded rod and the center electrode.

In a further development it is provided that an external thread is formed on an outer edge of the end section of the metal housing.

In a further development, it is provided that the positive multipole multipole spark plug further comprises an outer intermediate ring, the outer intermediate ring being connected to the outer thread of the metal housing in an adapted manner.

1. (1) ein Elektrodenblech mit zumindest zwei Elektroden an die Mittelelektrode angeschweißt wird, wobei die Hochspannung von der Mittelelektrode die mehrere Pole des Elektrodenblechs erreicht, das Kraftstoff-Luft-Gemisch durchschlägt und einen Funken erzeugt, wenn die Zündkerze arbeitet, wobei ein Strom von den mehreren Polen zu einer Mehrzahl von entsprechenden Punkten an der oberen Fläche des Metallgehäuses erreicht, wobei eine mehrpolige Zündung realisiert wird, wobei die Nachteile, die durch eine unipolare Zündung verursacht werden, wie die schlechte Zündwirkung, eine geringe Betriebszuverlässigkeit und eine leichte Erzeugung von Kohlenstoffablagerungen, beseitigt werden.
2. (2) ein Hohlraum ist zwischen dem Keramikkörper und der inneren Seitenwand des Metallgehäuses vorgesehen, um eine Wärmekammer (d.h. eine Luftkammer) zu bilden, wobei das vorliegende Gebrauchsmuster das Phänomen unterbindet, dass in Betriebsbedingungen wie Leerlauf und bei niedriger Drehzahl des Motors haften Kohlenstoffablagerungen, die aufgrund unzureichender Kraftstoffverbrennung erzeugt werden, zwischen dem Elektrodenblech und dem Metallgehäuse an, was bewirkt, dass der Kreis mit Erde verbunden wird, so dass die Zündkerzenzündung versagt; wobei das dichtende Füllen der Keramik in den Metallgehäuse eine Kohlenstoffablagerung im Vergleich zu dem Stand der Technik erleichtert, an dem Elektrodenblech und dem Metallgehäuse anzuhaften, wobei die Wärmekammer des vorliegenden Gebrauchsmusters gleichbedeutend mit einem bestimmten Aufnahmeraum für Kohlenstoffablagerungen ist, wobei die Kohlenstoffablagerung nach ihrer Entstehung zunächst in einen Hohlraum der Wärmekammer eintritt und anschließend aufgrund der erhöhten Drehzahl des Motors selbstentzündet und durch eine Schwingung abgelöst wird, wobei das vorliegende Gebrauchsmuster die Stabilität und Lebensdauer der Zündkerze erhöht und das Auftreten einer Fehlzündung der Zündkerze verringert, wobei gleichzeitig die effektive Arbeitskilometer der Zündkerze erheblich verbessert wird.
3. (3) da die Wärmekammer in der Zündkerze der positiven mehrpoligen Zündkerze vorgesehen ist, kann die Kontaktfläche des Gemischgases mit der Zündkerze durch Einstellen der Größe des Aufnahmeraums der Wärmekammer verändert werden, damit eine Anpassung der Höhe des Heizwerts erreicht wird. Das vorliegende Gebrauchsmuster ermöglicht die Einstellung einer Höhe eines Heizwerts einer Zündkerze gemäß dem Bedarf an Heizwerten von verschiedenen Motoren, so dass die Zündkerze an eine Vielzahl von verschiedenen Motoren angepasst werden kann, wobei die Zündkerze des vorliegenden Gebrauchsmusters einen größeren Anwendungsbereich und eine breitere Verbreitung hat, insbesondere für die geografischen Merkmale mit großer Spannweite des Breitengrads und großer Temperaturunterschiede.

The present utility model achieves advantageous effects compared to the prior art:

1. (1) An electrode sheet with at least two electrodes is welded to the center electrode, the high voltage from the center electrode reaching the multiple poles of the electrode sheet, breaking through the fuel-air mixture and generating a spark when the spark plug is working, with a current flowing from the multiple poles to a plurality of corresponding points on the upper surface of the metal case, realizing multi-pole ignition, the disadvantages caused by unipolar ignition such as poor ignition efficiency, poor operational reliability and easy generation of carbon deposits, be eliminated.
2. (2) a cavity is provided between the ceramic body and the inner side wall of the metal case to form a heat chamber (i.e., an air chamber), the present utility model eliminating the phenomenon that carbon deposits adhere in operating conditions such as idling and low speed of the engine, generated due to insufficient fuel combustion between the electrode sheet and the metal case, causing the circuit to be connected to earth, so that the spark ignition fails; The sealing filling of the ceramic in the metal housing facilitates a carbon deposition in comparison to the prior art to adhere to the electrode plate and the metal housing, the heat chamber of the present utility model being synonymous with a specific receiving space for carbon deposits, the carbon deposits initially after their formation enters a cavity of the heat chamber and then self-ignites due to the increased speed of the engine and is replaced by an oscillation, the present utility model increasing the stability and service life of the spark plug and reducing the occurrence of a misfire of the spark plug, while at the same time the effective working kilometers of the spark plug considerably is improved.
3. (3) Since the heat chamber is provided in the spark plug of the positive multi-pole spark plug, the contact area of the mixture gas with the spark plug can be changed by adjusting the size of the space of the heat chamber to adjust the level of the calorific value. The present utility model enables an amount of a calorific value of a spark plug to be adjusted in accordance with the need for calorific values of various engines, so that the spark plug can be adapted to a variety of different engines, the spark plug of the present utility model having a wider range of applications and wider use, especially for the geographical features with a large latitude range and large temperature differences.

Figure list

• 1 Fig. 13 is a view showing the structure of a spark plug of the side electrode of the first prior art;
• 2 Fig. 13 is a view showing the structure of a spark plug of the positive multipolar spark plug of the second prior art;
• 3 Fig. 3 is a front view of the present utility model;
• 4th Fig. 3 is a plan view of the present utility model;
• 5 Fig. 3 is a sectional view of the present utility model.

In the figures: 10. metal housing; 20. ceramic insulator; 30. center electrode; 40. electrode sheet; 41st electrode; 42nd pole; 50. Wiring threaded rod; 60. electrical resistance; 70. outer intermediate ring; 80. Warming chamber.

DETAILED DESCRIPTION

In the following, the present utility model is explained in more detail with reference to the figures and the specific embodiments, whereby it should be noted that the embodiments or technical features described below can be combined with one another as desired in order to create new embodiments without contradicting one another.

Regarding 3-5 The present utility model discloses a positive multipole multi-pole spark plug which has a metal housing 10 , a ceramic insulator 20th , a center electrode 30th , an electrode sheet 40 and a wiring threaded rod 50 includes; being the metal case 10 a structure having an upper opening and a lower opening, wherein an interior of the metal housing 10 firmly to the ceramic insulator 20th is provided with the wiring threaded rod 50 with the center electrode 30th connected and the wiring threaded rod 50 and the center electrode 30th coaxially within the ceramic insulator 20th are arranged, with one end of the center electrode 30th from the ceramic insulator 20th extends, being at the center electrode 30th an electrode sheet 40 is firmly attached, At least two electrodes 41 are on the electrode sheet 40 provided, the electrodes 41 above the metal case 10 are provided, with between the electrode 41 and the metal case 10 a gap is formed. The ceramic insulator 20th is not tight in the metal housing 10 filled, with a cavity between the ceramic insulator 20th and the inner side wall of the metal case 10 is provided to a heating chamber 80 (ie an air chamber) to form, being in the heat chamber 80 a fuel-air mixture is filled.

In operation, the high voltage is drawn from the wiring threaded rod 50 to the center electrode 30th out and penetrates a gas that is in the gap between the electrode sheet 40 and the metal case 10 located, creating a spark, the current of a multitude of poles on the electrode sheet 40 to a plurality of corresponding locations on the top surface of the metal housing 10 flows and then goes to ground through the spark plug housing and engine cylinder. In this process, the pole is the center electrode 30th , the electrode sheet 40 the positive electrode, and the metal case 10 is the negative electrode.

Specifically, each electrode includes 41 of the electrode sheet 40 at least two poles 41 . Any electrode 41 is subjected to a slot treatment, the at least two poles 42 forms. The effect of this embodiment is: since the discharge of the spark plug electrode with long-term operation ablates the electrode and a corresponding point, the distance between the positive and negative electrodes becomes larger than the flashover discharge distance at the voltage at the electric pole, and a spark, which ignites the fuel-air mixture cannot be formed, thus two electrical poles 42 in each electrode 41 are formed slotted to form an ignition of a multipole multipole ignition, wherein the ignition process is not affected by ablation of a certain electrode, the stability of the operation of a spark plug is effectively improved, and an operating life of the spark plug is extended.

More precisely, the gap between the two poles 42 on the same electrode 41 is not less than 0.3mm, ie the slot width is not less than 0.3mm. Due to the small distance between the poles 42 to each other there is a circuit between the poles 42 affecting the ignition of the spark plug. Therefore make sure that the distance between the poles 42 must not be too small.

Specific is with respect to 4th the electrode sheet 40 in one embodiment cross-shaped, the electrode sheet 40 four electrodes 41 each electrode 41 two poles 42 having. The number of electrodes goes without saying 41 and poles 42 not particularly limited, a number of electrodes and a number of poles, which enable multipole ignition everywhere, are within the scope of the present utility model.

Specifically, the heating chamber has 80 is in the shape of a circular ring and has a U-shaped cross section. Of course, the size and depth of the volume of the heating chamber 80 are not limited to specific values and can be adjusted according to the requirements of a current heating value of the engine, thus changing the size of the contact area between the mixture gas and the spark plug in order to enable the heating value of the spark plug to be adjusted.

The electrode sheet is specific 40 firmly to the center electrode 30th welded.

The ceramic insulator is specific 20th made from an alumina material. The primary characteristics of aluminum oxide ceramics are their high hardness (HRA 87 at 760 ° C, and HRA82 can also be kept at 1200 ° C), good wear resistance and high temperature resistance, whereby the alumina ceramic at 1600 ° C high temperature can be used for a long period of time and the corrosion resistance is very high, the alumina ceramic being a has good electrically insulating properties, and the electrically insulating properties are particularly good at high frequencies, with a voltage of more than 8000V per millimeter of thickness can be tolerated. More specifically, is the outer surface of the ceramic insulator 20th also coated with a layer of glaze. The surface of the ceramic insulator 20th is glazed to have a dirt-repellent effect.

Specifically, the present utility model includes an electrical resistor 60 , where the electrical resistance 60 between the wiring threaded rod 50 and the center electrode 30th connected. The purpose of electrical resistance 60 is mainly to prevent a high voltage electrical wave from a spark plug from interfering with normal operation of other electrical circuit parts of a vehicle, and another object is to reduce the current when the spark plug is ignited and discharged, thereby erosion damage to the discharge current to the Spark plug electrode is decreased.

Specifically, there is an external thread on the outer periphery of the end portion of the metal shell 10 designed to facilitate the matched assembly with the metal cylinder liner of the engine during assembly of the spark plug.

Specifically, the present utility model furthermore comprises an outer intermediate ring 70 , the outer intermediate ring 70 on the external thread of the metal housing 10 Pay attention is the outer intermediate ring 70 serves to provide a seal and protection for the assembly between the spark plug and the metal cylinder sleeve of the engine.

The metal housing is specific 10 formed of a low carbon steel material, the low carbon steel having advantages of good thermal conductivity and high hardness, more specifically to prevent rust corrosion to prevent fusing with the cylinder head at a high temperature, so as to To prevent seizure, the outer layer of the housing can be plated with a material such as zinc, chromium, nickel, titanium, etc., which is protected from corrosion.

1. (1) ein Elektrodenblech 40 mit zumindest zwei Elektroden 41 wird an die Mittelelektrode 30 angeschweißt, wobei die Hochspannung von der Mittelelektrode 30 die mehrere Pole 42 des Elektrodenblechs 40 erreicht, das Kraftstoff-Luft-Gemisch durchschlägt und einen Funken erzeugt, wenn die Zündkerze arbeitet, wobei ein Strom von den mehreren Polen zu einer Mehrzahl von entsprechenden Punkten an der oberen Fläche des Metallgehäuses 10 erreicht, wobei eine mehrpolige Zündung realisiert wird, wobei die Nachteile, die durch eine unipolare Zündung verursacht werden, wie die schlechte Zündwirkung, eine geringe Betriebszuverlässigkeit und eine leichte Erzeugung von Kohlenstoffablagerungen, beseitigt werden.
2. (2) ein Hohlraum ist zwischen dem Keramikkörper und der inneren Seitenwand des Metallgehäuses vorgesehen, um eine Wärmekammer 80 (d.h. eine Luftkammer) zu bilden, wobei das vorliegende Gebrauchsmuster das Phänomen unterbindet, dass in Betriebsbedingungen wie Leerlauf und bei niedriger Drehzahl des Motors haften Kohlenstoffablagerungen, die aufgrund unzureichender Kraftstoffverbrennung erzeugt werden, zwischen dem Elektrodenblech 40 und dem Metallgehäuse 10 an, was bewirkt, dass der Kreis mit Erde verbunden wird, so dass die Zündkerzenzündung versagt; wobei das dichtende Füllen der Keramik in den Metallgehäuse eine Kohlenstoffablagerung im Vergleich zu dem Stand der Technik erleichtert, an dem Elektrodenblech 40 und dem Metallgehäuse 10 anzuhaften, wobei die Wärmekammer 80 des vorliegenden Gebrauchsmusters gleichbedeutend mit einem bestimmten Aufnahmeraum für Kohlenstoffablagerungen ist, wobei die Kohlenstoffablagerung nach ihrer Entstehung zunächst in einen Hohlraum der Wärmekammer 80 eintritt und anschließend aufgrund der erhöhten Drehzahl des Motors selbstentzündet und durch eine Schwingung abgelöst wird, wobei das vorliegende Gebrauchsmuster die Stabilität und Lebensdauer der Zündkerze erhöht und das Auftreten einer Fehlzündung der Zündkerze verringert, wobei gleichzeitig die effektive Arbeitskilometer der Zündkerze erheblich verbessert wird.
3. (3) da die Wärmekammer 80 in der Zündkerze der positiven mehrpoligen Zündkerze vorgesehen ist, kann die Kontaktfläche des Gemischgases mit der Zündkerze durch Einstellen der Größe des Aufnahmeraums der Wärmekammer 80 verändert werden, damit eine Anpassung der Höhe des Heizwerts erreicht wird. Die Höhe des Heizwerts der Zündkerze kann bei dem vorliegenden Gebrauchsmuster ferner auf der Basis von Heizwertanforderungen von verschiedenen Motoren eingestellt werden, um die Zündkerze für eine Vielzahl von verschiedenen Motoren anpassbar zu machen, wobei die Zündkerze des vorliegenden Gebrauchsmusters einen größeren Anwendungsbereich und eine breitere Verbreitung hat, insbesondere für die geografischen Merkmale mit großer Spannweite des Breitengrads und großer Temperaturunterschiede.

From the detailed description of the above exemplary embodiments, it can be understood that the present utility model has the following technical effects:

1. (1) an electrode sheet 40 with at least two electrodes 41 is attached to the center electrode 30th welded on, with the high voltage coming from the center electrode 30th the multiple poles 42 of the electrode sheet 40 is achieved, the fuel-air mixture breaks down and creates a spark when the spark plug operates, with a current from the plurality of poles to a plurality of corresponding points on the upper surface of the metal shell 10 is achieved, realizing multi-pole ignition, the disadvantages caused by unipolar ignition, such as poor ignition efficiency, poor operational reliability and easy generation of carbon deposits, are eliminated.
2. (2) A cavity is provided between the ceramic body and the inner side wall of the metal case to provide a heating chamber 80 (ie, an air chamber), the present utility model suppressing the phenomenon that in operating conditions such as idling and low speed of the engine, carbon deposits, which are generated due to insufficient fuel combustion, stick between the electrode sheet 40 and the metal case 10 on causing the circuit to be connected to earth causing the spark plug to fail; wherein the sealing filling of the ceramic in the metal housing facilitates a carbon deposition compared to the prior art, on the electrode sheet 40 and the metal case 10 to adhere, the heating chamber 80 of the present utility model is synonymous with a certain receiving space for carbon deposits, the carbon deposit after its formation initially in a cavity of the heating chamber 80 occurs and then self-ignites due to the increased speed of the engine and is replaced by a vibration, the present utility model increasing the stability and life of the spark plug and reducing the occurrence of a misfire of the spark plug, while at the same time the effective working kilometers of the spark plug is significantly improved.
3. (3) there the heating chamber 80 is provided in the spark plug of the positive multi-pole spark plug, the contact area of the mixture gas with the spark plug can be adjusted by adjusting the size of the receiving space of the heating chamber 80 can be changed so that an adjustment of the calorific value is achieved. The level of the calorific value of the spark plug in the present utility model can furthermore be adjusted on the basis of calorific value requirements of different engines in order to make the spark plug adaptable to a variety of different engines, the spark plug of the present utility model having a wider range of applications and wider distribution , especially for the geographical features with a large latitude span and large temperature differences.

The embodiments described above are only preferred embodiments of the present utility model, and the scope of protection of the present utility model is not limited thereto, and any insubstantial changes and substitutions that can be made by a person skilled in the art on the basis of the present utility model are intended to be included in the The scope of protection of the present utility model.

Claims (10)

A positive multi-pole multi-pole spark plug characterized in that it comprises a metal case, a ceramic insulator, a center electrode, an electrode sheet and a wiring threaded rod; wherein the metal case has a structure with an upper opening and a lower opening, wherein an inner space of the metal case is fixedly provided with the ceramic insulator, the wiring screw rod is connected to the center electrode, the wiring screw rod and the center electrode each inside the ceramic insulator are arranged, wherein one end of the center electrode extends from the ceramic insulator and is firmly connected to the electrode sheet, wherein the electrode sheet has at least two electrodes, the electrodes are positioned over the metal housing, with a cavity between the ceramic insulator and the inner side wall of the metal housing is provided to form a heating chamber. Positive multipole multipole spark plug after Claim 1 , characterized in that each of the electrodes on the electrode sheet has at least two poles. Positive multipole multipole spark plug after Claim 1 or 2 , characterized in that the electrode sheet has the shape of a cross, the electrode sheet comprising four electrodes. Positive multipole multipole spark plug after Claim 2 , characterized in that the gap between the two poles on the same electrode is not less than 0.3mm. Positive multipole multipole spark plug after Claim 1 , characterized in that the heating chamber has an annular shape. Positive multipole multipole spark plug after Claim 1 , characterized in that the electrode sheet is permanently welded to the center electrode. Positive multipole multipole spark plug after Claim 1 , characterized in that the ceramic insulator is an alumina ceramic insulator. Positive multipole multipole spark plug after Claim 1 , characterized in that the multi-pole positive spark plug further comprises an electrical resistor, the electrical resistor being connected between the wiring threaded rod and the center electrode. Positive multipole multipole spark plug after Claim 1 , characterized in that an external thread is formed on an outer edge of the end portion of the metal housing. Positive multipole multipole spark plug after Claim 9 , characterized in that the positive multi-pole multi-pole spark plug further comprises an outer intermediate ring, the outer intermediate ring being matched to the external thread of the metal housing.

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