JPS60121692A - Spark plug and its ignition system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a spark plug used in an internal combustion engine and its ignition system.

BACKGROUND OF THE INVENTION US Pat. No. 5,202,859, issued to Knaggs VC, discloses a spark plug in which the center-one pole extends beyond the end of the spark plug. The four elongated carapaces surrounded by the insulator are in turn surrounded by the outer 1ull' electrode. The outer 1ltl structure is an embankment-like outer part system,
The rift is in direct contact with the insulator. In this structure, an air gap or spark gap is provided, and the generated spark passes along the surface of the insulator from the center electrode to the outer electrode.

U.S. Pat. No. 4,087,719 to Pratt, Jr. discloses a spark plug Fk having a tine insulator disposed between an annular outer electrode and an energized center electrode. . The center 1'2 pole has a spark surface not covered by the insulator. The annular outer electrode is fixed to the spark plug body. The annular outer electrode and the center part are not in direct contact with each other with an air gap.

US Percent No. 6.6 awarded to Baur
No. 83,232 discloses a capacitor-free plug cap connected between a live electrode and ground. The additional capacitors are as follows: 1. The effect is to increase the strength of the leakage generated in the air gap between the generated IL and the outer electrode.

(Another issue Beau is attempting to address) Further improved ignition is required in engines that use leaner than normal fuel mixtures. In particular, in high swirl engines, it is essential to improve small flame characteristics and obtain stable exhaust through both significantly increased arc length and ionization without the need for extremely high breakdown voltages. It is said that These are some of the problems that the present invention seeks to solve.

(Means for using the between L and I! points) According to the present invention, the spark plug has a ring-shaped air gap and a ring-shaped spark gap between the first first pole and the second Asahi pole. There is a creepage spark passage. The front section is 1 width, the pole has a ring shape, and the center is 11140 f! 0:1ll
IIl formation 1-ru. The second electrode is distributed within the central opening of the first electrode. Ceramic insulation porcelain ^1
1. The insulating material is disposed between the first electrode and the second peak electrode, and is arranged to have a spark passage +M+ (16 formed 1-) between the first stingy electrode and the second electrode. is spaced apart from said first city pole or ring so as to define a spark gap therebetween, so that said spark passageway is activated when said insulating material is shaped like 5'v. The spark passes towards the Asahi 1 Densei until it reaches a spark gap, where the spark leaves the surface of the insulating material.

Advantages of the Invention The invention provides improved ignition, and is particularly advantageous for igniting high swirl mixtures, ie mixtures in which the flow in the cylinder is at the rate of hot water.

The negative advantage is that once a spark is ignited somewhere along the front IE ring-shaped pole, it ignites on the surface of the ring-shaped electrode and the ceramic IP edge porcelain, causing the air-fuel mixture flow to collide. The opposite side of the spark plug can move to an area where the speed is low. This means that the core of the flame that adheres to the ring electrode can be This improves ignition characteristics and reduces fluctuations in exhaust pressure from cycle to cycle.The initial flame core is located on the side of the ceramic tip of the plug that is not exposed to the wind, rather than on the side of the spark plug where the flow velocity is high. It's better than growing up
It has a region where + is combined.

(If i'l, m1 is because low flow velocities in wind-unaffected bodies reduce convective heat loss from the nascent flame core.・
, which ensured a faster growth of the flame core and a more constant firing level of 1g, bringing about stability. In addition to the spark path in the surface, this includes the spark path in the spark gap, so this
This makes it easy to prevent the surface from becoming contaminated with carbon (--which ensures that even the metal will not ignite).

(Embodiment If11) Referring to FIG. 1, the spark plug 1o includes a central pole 11 and an annular ring overlap 12, ie, an outer cold pole. The generally raised-shaped ceramic insulator 13 is straightened concentrically around the center 1k11. The center 'i' pole ii has a perfect cylindrical shape as a whole and is elongated, and the surface diameter of 1 to 6 mm is usually 1=r. The insulator 13 is concentric with the central cold pole 11 and
I'm being raped. The electrode 12 is formed around the insulator 13 in the shape of a ring (12 in Figure 2A) or in the shape of an annular washer (12B in Figure 2B) and typically has dimensions of about 0.25 mm to 0.75 mm. It is separated from the insulator 13 by a ring-shaped air gap 7'14, ie, a spark gap. Usually, the outer diameter of the ring electrode 12 is about 8 mm to 12+++π,
Its inner diameter is approximately 4 mm to 6 mm.

In operation, the spark passage (S) passes from the center electrode 11 on the slope of the insulator 13 to the air gap 14, where the spark passage (81 is connected to the ring '1
1' pole 11. As a result, most of the breakdown voltage required during actual engine operation (typically 1QKV to 30 KV) breaks air gap 7°14 and The length of the spark includes the trajectory passing through the surface of the insulator 130, so it can be considerably longer than the air gear tube 14.
The length of one superorbit is typically about 1 mru or 5 mm.

Referring to FIG. 2A, a cross-sectional portion of the spark plug 10 has an integrally integrated capacitor 15. The capacitor 15 is formed by a conductive part 16 coupled to the electrode 12, an insulating part 17 and a conductor part 18 connected to the spark plug 10 and receiving the spark energy. The guide member 18 is electrically connected to the center electrode 11. The insulating part 17 has a tubular shape as a whole and extends in the axial direction in the spark plug 1001 portion.

In order to maintain a stable and unquenchable spark arc even under high velocity flow conditions within the cylinder, the ring-shaped gap type flag requires sufficient ergonomics. Additionally, the added plug capacitor requires extra fire energy to fully charge the capacitor to the spark plaque failure ratio. FIG. 6 shows an electrical circuit providing sufficient ignition gear to operate a ring gap type flag according to an embodiment of the present invention.

Referring to Figure 6, which supports a 4-cylinder, high-energy point system without a distributor, a typical management circuit is
The false fire coil 2 (shown as including +, 21, 22 and 23) is connected to the ignition module 24 which is connected to the +@++ side by the ignition module 24.

Capacitors 28, 29, 30 and 31 are shown connected in parallel with spark plugs f 32, 33, 34 and 35, respectively. The coils 20 and 22 are connected to the spark plugs 7' 32, 33, 34 and 35 by diodes 36, 37, 38 and 39, respectively. The coils 21 and 23 are connected to the spark plugs 7'''32, 33, 34 and 35, and the diode 40.
．． 41, 42 and 43, respectively.

In operation, by analyzing input sensor signals from the engine (not shown) and according to an initial control program, the engine control computer edge module connects a pair of coils 20 and 21.
Determine when to energize and when to de-energize and 1- when C1i'J. Time interval of excitation, common dwell
The immobile i+a point is called the instantaneous timing. Sufficient dwell time is allowed to ensure sufficient stored energy within each coil. Immobile☆
When set to H, energy is transferred from the primary winding of each coil to the secondary dagger, and the spark gap is 0.
! A flow of 2 rK frost I5iE enters into each capacitor 2B and 29 until Ia (breakdown) occurs and reaches 6. When a dielectric breakdown occurs, the energy stored in the capacitor and any remaining coil energy is released into the fuses 32 and 33. The 1/1 spark gap, 11 and 32, corresponds to the engine cylinder in the compression stroke, while the other one, 33, corresponds to the engine/cylinder in the throat stroke.

High voltage diodes 36 and 40 OR the two negative voltage outputs to the spark gap 7'32, while diodes 41 and 37 OR the two positive voltage outputs Of(
Add to the spark gap 33 at ℃. The ignition module 24 includes a power transistor switch used to energize and de-energize the primary winding of the coil with supply current from a 14 V battery.
stor 5wltches ) Y included.

The lower coil 2 is delayed by 180° crank angle.
pairs 2 and 23, spark gaps 34 and 35;
A similar operation occurs when diodes 38, 39, 42 and 43 are activated by engine control computer 26.

(Effect of the invention) Preferably, Spark Silag 10 is about 10
It has a high plug capacitance (100 to 200 picofarads) compared to the value of picofurads. This significantly increases the frost flow during the initial breakage event, which occurs during the first 100 nanoseconds of spark generation, from the traditional 10 to 50 amps to the 20'0 amps to 1000 amps. It became something that generated a torrent of Beakkya 2 Gusitance. Could such intense and rapid initial destruction be the result of a much larger initial flame core? Generates a plasma shock wave that causes warping, V
Approximately 10% of the O content is 10% greater than that of C.
This results in a reduction in time m1, improved ignition performance, and improved combustion stability. The large outer circumference, ground contact, hammered outer pole, and plug provide good durability and a wide heat-resistant enclosure.
-The structure is now as follows.

The ignition system that does not use a distributor is connected to this spark plug and has a permissible engine unit, and produces almost no interference with the M wave number (radio).
1 - less than that, and 1gi*A i'+ '
This resulted in an improvement of c times.

The ring gap type flag, the unused distributor system, and the added capacitor in parallel with the spark gap provide long-term +:j
Combustion of 1 fuel component - has the advantages of working with a mixture, improved fuel punching efficiency, excellent maneuverability due to achieving several degrees of combustion stability, and radio performance due to not using a distributor. A star in damp weather due to the prevention of frequency V3 harm, simpler construction, improved idle characteristics and reduced fuel flow at idle, and no condensation at the distributor. Improvements in timing were introduced.

Numerous modifications and variations will no doubt occur to those skilled in the art of the invention. For example, the specific I of the ring pole
+1 The surface shape can be different from that disclosed in this application. In addition, a capacitor can be added to the plug using an outer adapter that forms part of the plug date. These and All other variants are
As long as the technology is fundamentally dependent on this imitation and improved by the present disclosure in number, it is rightly considered to be within the scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 shows a perspective view of the tip of a spark plug according to an embodiment of the present invention, FIG. 2A shows a new view of the spark plug according to an embodiment of the present invention, and FIG. 2B is different from FIG. 2A. In the partial cross-sectional view of a spark plug according to a different embodiment of the invention, the spar plug ph pole is shown as a dough having a circular shape. Asahi 6 (Me 1 is the spark gap according to the embodiment 1 and 11 of the present invention;) 51+ circuit diagram suitable for 5 series 1-1-1-1-. 10...Spark plug 11...P center skewer (2nd month 1st pole) 12...
・Ring-shaped outer ↑ze, extreme) Σ1 box, extreme) 13...
...Ceramic insulator (furnace, edge material) 14...
...Air gap (spark gap) 15...
... Capacitor 16 ... Hayashi Sayamabe (first board) 17 ...
・Rosato 1 18...Width of conductor H4 part (second board) 28.29.
30.31...Capacitor 32.33.34,
35...Spark Gap Agent Akira AsariContinued from page 10 Inventor Aladar Otsuto Amesimco - Shinoka Dearborn, Michigan, United States 6091 University Drive

Claims (1)

[Scope of Claims] (1) A spark plug having a ring-shaped spark plug and a creeping spark passage, comprising: a ring-shaped first pole defining a central opening; A second ′′ disposed within the central opening of the
100,000,000, and the first terminal is disposed between the first pole and the second terminal.
an insulating body material configured to form a surface for a passageway between the first electrode and the first electrode; A spark plug that is uniquely designed to create a unique spark. (2) In the spark plug according to claim 1), the jail (4 self-extinguishing g=t*; 3 material is made of ceramic, and the plane formed by the ring shape of the kL1' electrode (3) A spark plug according to claim 2, wherein the second member is made of ceramic and extends in the axial direction beyond the length of the insulating material. (4) The spark plug according to claim 6, wherein a capacitor is connected in parallel with the spark passage between the first electrode and the second city pole. 51. The spark plug according to claim 6, wherein the first electrode has a generally circular cross section. Spark plug. (6) In the spark plug according to patent claim IF 1m No. 3 JJ, the second red electrode and the insulating paulownia material are adjacent to each other and at least a portion of them is in contact with each other. , the capacitor includes a first plate coupled to the first electrode and a second plate coupled to the first electrode.
1. a second plate that is integrally coupled to the spark plug and is located intermediate the first plate and the second plate and extends over at least a portion of the overall length of the spark plug; A spark plug comprising: an insulating member having a generally tubular shape and extending in an axial direction. (7) In the spark plug according to claim 6, the O11 spark gap is about 0.25 mm.
It has a length from 0.75mm to 0.75cm, and the first city pole is the outer diameter or about F3mm to 12mm.
mWl, and within only about 4 mrR to 6 am
The material has a spark passing raceway surface of about 1 mm to 3 mm between the 1116 double orbital and the spark gap, which is adapted to hold the spark passage. Includes 1-low spark plug. (In an 81 spark plug ignition system, an ignition system that does not use a distributor and is adapted to provide a significant amount of false flame energy to ignite a pair of spark plugs, each of the spark plugs having approximately It has a digicatance of 100 to 200 picofarads and about 2[JLl to i,uo
o amperes, and each of said spark plugs has: a first frost pole having a ring shape defining a central opening; between the first and second electrodes, and the first and second electrodes are arranged so as to form a spark passage surface between the first and second electrodes; a ceramic insulating material, wherein the insulating material is spaced apart from the first frost pole to define a spark gap therebetween; and the insulating material is spaced from the first frost pole. extends in the axial direction by wiping the plane formed by the ring shape, and further extends in the axial direction of the insulating paulownia material, and the plane, 2
11ii; the pole and the second pole; the spark between the pole and the second pole; the pole and the second pole; a capacitor disposed in parallel with the passageway, the capacitor comprising a first plate coupled to the first electrode, a second plate coupled to the second electrode, and a second plate coupled to the second electrode;・,1
1111 located intermediate the plate and the second plate and along at least 1 gs of the total length of the spark plug.
1. A spark plug ignition system comprising: a capacitor including a generally tubular insulating member extending in a direction.