CN100444483C

CN100444483C - Ignition device for IC engine

Info

Publication number: CN100444483C
Application number: CNB2004100574214A
Authority: CN
Inventors: 川井一秀; 佐藤美孝; 加藤秀幸
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2003-08-12
Filing date: 2004-08-12
Publication date: 2008-12-17
Anticipated expiration: 2024-08-12
Also published as: DE102004039036B4; CN1581612A; DE102004039036A1

Abstract

Provided is an ignition device for an internal combustion engine capable of simplifying a forming die of a cylinder head cover 100 to reduce costs, and securely fixing an ignition coil 1 to the cylinder head cover 100, even when improving workability to insert the ignition coil 1 into the cylinder head cover 100. The ignition coil 1 has a seal member 150 comprised of a seal cylindrical part 151 fitted to a coil housing diameter enlarged part 22 and a seal projecting annular part 152 which is protruded in an outer peripheral side of the seal cylindrical part 151, of which outermost peripheral end 155 is abutted on an inner peripheral face of a plug hole 101, and in which an angle [theta] between a seal upper face 153 and the inner peripheral face of the plug hole 101 is formed to be larger than an angle [psi] between a seal lower face 154 and the inner peripheral face of the plug hole 101.

Description

The igniter that is used for internal combustion engine

Technical field

The present invention designs a kind of igniter, and it is used for ignition coil is installed to internal combustion engine.

Background technology

Be used for the general point ignition system of internal combustion engine, a mechanical type power distribution device utilizes high-tension cable that secondary high pressure is optionally flowed to a plurality of spark plugs.Recently, for each spark plug is provided with independently ignition coil, wherein, ignition coil is directly mounted on the spark plug, thereby ignition system and assembling process thereof have all been become simply.In a plurality of ignition coils of this existing ignition system-that is to say were installed to ignition system on the valve mechanism cover, these ignition coils normally were swirled in the spark-plug hole.

According to technology in the last few years, the someone has proposed such scheme: by cancellation screw fit structure, ignition coil directly is installed on valve mechanism cover and the spark plug.For example in 2001-115940 number and H11-191476 Japanese patent application, disclose such technology.

In the disclosed igniter of 2001-115940 Japan Patent, be shaped on a plurality of claw-form on the end face of valve mechanism cover integratedly, valve mechanism cover is wherein made by synthetic resin.Strain can take place in claw-form, thereby when ignition coil will be inserted in the consent, claw-form can be outwardly-bent and allow ignition coil to be inserted in the consent.After ignition coil was inserted into, claw-form engaged with ignition coil, deviate from from consent to prevent it.

But according to this prior art, the structure of claw-form and manufacture process all are very complicated, thereby cost is increased.

In the disclosed igniter of another Japan Patent H11-191476, utilize a simple annular seal element that ignition coil is fixed in the consent.The problem that must consider is: ignition coil should be inserted securely and be remained in the consent, thereby can not deviate from from consent owing to the vibration of engine.But this scheme then is disadvantageous on this meaning.That is to say that if sealing force is strengthened, then assembling process will become difficult.On the other hand, smaller if sealing force is designed to be, ignition coil can easily be assembled in the consent, but is not enough to ignition coil is firmly held in the consent.

Summary of the invention

Consider above-mentioned problem, an object of the present invention is to provide a kind of igniter, it is simple in structure; In assembling process, be easy to ignition coil is inserted in the consent; And can reliably ignition coil firmly be remained in the consent.

According to an aspect of the present invention, provide a kind of igniter, it is installed on the internal combustion engine with valve mechanism cover and spark-plug hole, and spark-plug hole wherein is formed on the valve mechanism cover, and this igniter comprises:

Ignition coil, it has an elementary winding, level winding and a solenoid housing, and solenoid housing is used at least a portion of elementary winding and secondary winding is contained within it, and ignition coil produces the high pressure that is used to form pilot spark; And

Spark plug, it is installed in the spark-plug hole, and keeps being electrically connected with secondary winding, thus when ignition coil produced high-tension electricity, spark plug produced a discharge spark;

Wherein, igniter also comprises:

Sealing device, described sealing device has: a columnar seal, described seal are set on the periphery of solenoid housing; The projection of annular, described projection be from the outwards outstanding inner surface to spark-plug hole of cylindrical shape seal, thereby the outer peripheral portion of projection is contacted with the inner surface of spark-plug hole, and

Wherein, first angle that forms between the first surface of annular protrusion and the spark-plug hole inner surface is designed to greater than one second angle, second angle is to form between the inner surface of the second surface of annular protrusion and spark-plug hole, wherein, first angle and second angle are the angles that records in the plane of the longitudinal axis that comprises sealing device, and the second surface present position is than the more close spark plug of first surface.

According to a feature of the present invention, a columnar sealing device is set, between a solenoid housing and a consent so that ignition coil is firmly held in the consent.

According to another aspect of the present invention, a kind of igniter is provided, its be installed to have valve mechanism cover, spark-plug hole and being formed on the internal combustion engine of a pair of opposing sidewalls on the valve mechanism cover, spark-plug hole wherein is formed on the valve mechanism cover, described opposing sidewalls is opposed mutually across spark-plug hole, and this igniter comprises:

Ignition coil, it has an elementary winding, level winding and a solenoid housing, solenoid housing is used at least a portion of elementary winding and secondary winding is contained within it, ignition coil produces the high pressure that is used to form pilot spark, wherein, solenoid housing comprises that one is inserted into first housing parts and in the spark-plug hole and protrudes in second housing parts outside the valve mechanism cover, and second housing parts has a pair of side that is parallel to each other; And

Wherein, igniter also comprises:

A pair of sealing device, each sealing device all has: a seal, it is set on the corresponding side surface of second housing parts; One seal convexity, it is from the outstanding inner surface to sidewall of seal, thereby the outer peripheral portion of seal convexity is contacted with inside surface of side wall; And

First angle that forms between the first surface of seal convexity and the side wall inner surfaces is designed to greater than one second angle, second angle is to form between a second surface of seal convexity and inside surface of side wall, wherein, first angle and second angle are the angles that records in the fore-and-aft plane perpendicular to sidewall, and the second surface present position is than the more close spark plug of first surface.

According to another feature of the present invention, on valve mechanism cover, form a pair of mutual opposed wall, be shaped on the side of pair of parallel on the solenoid housing, and between solenoid housing and two opposite side walls, be provided with a pair of sealing device respectively, thereby can utilize two opposite side walls keeping igniter securely.

Description of drawings

From the detailed description of hereinafter doing, can be expressly understood other purpose, feature and advantage of foregoing and the present invention more with reference to accompanying drawing.In the accompanying drawings:

Cutaway view among Fig. 1 has been represented the igniter according to first embodiment of the invention;

Fig. 2 is the schematic cross sectional views of amplifying, and has represented the sealing device according to first execution mode;

Schematic among Fig. 3 A and Fig. 3 B shows the projection of sealing device, and when ignition coil was inserted into consent and deviate from from consent, projection deformed;

Fig. 4 is the schematic cross sectional views of amplifying, and has represented the sealing device according to a kind of remodeling of first execution mode;

The schematic cross sectional views of amplifying among Fig. 5 has been represented the sealing device according to second execution mode;

Schematic among Fig. 6 A and Fig. 6 B shows the projection according to the sealing device of second execution mode, and when ignition coil was inserted into consent and deviate from from consent, projection deformed;

Fig. 7 is the schematic cross sectional views of amplifying, and has represented the sealing device according to a kind of remodeling of second execution mode;

The schematic cross sectional views of amplifying among Fig. 8 has been represented the sealing device according to the another kind of remodeling of second execution mode;

The schematic cross sectional views of amplifying among Fig. 9 has been represented the sealing device according to the 3rd execution mode;

Figure 10 and Figure 11 are the schematic cross sectional views of amplification, they have represented the sealing device according to a kind of remodeling of the 3rd execution mode, wherein, the situation when Figure 10 has represented that ignition coil is being inserted in the consent, Figure 11 has then represented the situation after ignition coil has been inserted in the consent;

The schematic cross sectional views of amplifying among Figure 12 and Figure 13 has been represented the sealing device according to the 4th execution mode, wherein, situation when Figure 12 has represented that ignition coil is being inserted in the consent, Figure 13 has then represented the situation after ignition coil has been inserted in the consent;

The schematic cross sectional views of amplifying among Figure 14 has been represented the sealing device according to the 5th execution mode;

The schematic cross sectional views of amplifying among Figure 15 has been represented the sealing device according to the 6th execution mode;

The schematic cross sectional views of amplifying among Figure 16 has been represented the sealing device according to a kind of remodeling of the 6th execution mode;

Figure 17 is the perspective view of an amplification, has represented according to high-voltage connection device of the present invention;

The perspective representation that amplifies among Figure 18 a kind of remodeling of high-voltage connection device;

Figure 19 has represented the 7th execution mode to Figure 21, and wherein, Figure 19 is the perspective view of ignition coil and valve mechanism cover, and Figure 20 is the vertical view of ignition coil, and Figure 21 is the front view of igniter;

Figure 22 and Figure 23 have represented the 8th execution mode, and wherein, Figure 22 is the cutaway view of a jockey, and Figure 23 is the perspective view of this jockey;

Perspective representation among Figure 24 according to the jockey of a kind of remodeling of the 8th execution mode; And

Perspective representation among Figure 25 according to the jockey of the another kind of remodeling of the 8th execution mode.

Embodiment

With reference to Fig. 1 according to an embodiment of the present invention igniter is introduced below, Fig. 1 has represented this igniter cross-section structure in the vertical.As shown in Figure 1, igniter comprises a valve mechanism cover 100, an igniting spark plug 200 and an ignition coil 1.

Valve mechanism cover 100 (part illustrates among the figure) is disposed in the top of the cylinder cap (not shown) of internal combustion engine (not shown).Corresponding with a plurality of cylinders of internal combustion engine, valve mechanism cover 100 is provided with a plurality of consents 101, and these consents side surface from it penetrate into downside surface (with the contacted surface of cylinder cap) and locate.Spark plug 200 (and ignition coil 1) is inserted in the consent 101.Be shaped on a step part 102 in the consent 101, the diameter of this step part is less than the diameter of uper side surface open end.

Below with reference to Fig. 2 the step part 102 of consent 101 is introduced.Valve mechanism cover 100 comprises one first lid (camb cap) 103, packing ring 104 and one second lid 105, and wherein, second lid contacts with the cylinder head (not shown).The diameter in hole is made the diameter less than first lid 103 on second lid 105, and the diameter of packing ring 104 is made the diameter greater than hole on first lid 103, thereby forms a cannelure 104a in consent 101.

In Fig. 1, spark plug 200 is inserted in the consent 101 of valve mechanism cover 100.Ignition coil 1 is set at the top of spark plug 200, hereinafter will be described it.Spark plug 200 is provided with spark plug terminals 201, and it keeps being electrically connected with the secondary winding 40 of ignition coil, wherein, is shaped on annular groove 202 on the terminals 201 one, and it is positioned at the centre position in the vertical.As known in the art, high-tension electricity passes to spark plug 200 from ignition coil 1 through terminals 201, produces pilot spark.

Ignition coil 1 is inserted in the consent 101 of valve mechanism cover 100 with spark plug 200.Ignition coil 1 is set at the upside of spark plug 200, and keeps with it being electrically connected.

Ignition coil 1 is equipped with a columnar solenoid housing 2, and it is made by synthetic resin, and has one first and expand part 20 and one second and expand part 22.As shown in Figure 1, first expands part 20 projection from valve mechanism cover 100 goes out, and second expands part 22 then is inserted in the consent 101.Second outer peripheral face that expands part 22 is provided with a sealing device 150 made from rubber.

In the inside of solenoid housing 2, be provided with a central iron core, elementary spool 3, elementary winding 30, secondary spool 4 and secondary winding 40.

Central authorities' iron core 5 comprises an iron-core element 54, a pair of flexible member 50 and a rubber tube 52, and wherein, iron-core element 54 is to be made by the silicon steel sheet of lamination.Flexible member 50 is a drum, and is made by silicon rubber, and they lay respectively at the both sides up and down of iron-core element 54.Rubber tube 52 also is cylindric, and iron-core element 54 and a pair of flexible member 50 are lived by rubber tube 52 ladle covers.

Secondary spool 4 usefulness synthetic resin are made, and it is shaped as and has the cylindric of bottom, and wherein, secondary spool is configured to central iron core coaxial, and is positioned at its peripheral part.Secondary winding 40 is wrapped on the outer peripheral face of secondary spool 4.In the upper end of secondary spool 4, along circumferentially being shaped on a plurality of (three) jaw 41 with the interval that equates, their projections that makes progress.

Elementary spool 3 is set at the peripheral part of secondary spool 4, and coaxial with it, and elementary winding 30 is wrapped on the outer peripheral face of elementary spool 3.In addition, also the peripheral part at elementary spool 3 is provided with core 31 outside, and this outer core 31 is cylindric, and has a slit that extends in the vertical.

Solenoid housing 2 first expands part 20 and is provided with a connector part 6, it comprises a connector parts 64 and an ignition control unit (hereinafter being referred to as igniter) 65, wherein, connector component 64 is made by synthetic resin, and stretches out the fenestra part 21 of part 20 along expanding with the vertical vertical direction of solenoid housing 2, from first.

Igniter 65 is set at first and expands the central part of part 20, and is made as one with connector component 64.On the downside surface 62 of igniter 65, be shaped on an annular protruding rib that is used to locate 63, it is inserted in the space that the flexible member 50 by secondary spool 4 limits, thereby makes central iron core 5 and secondary spool 4 have correct position in solenoid housing 2.Also be shaped on the jaw 66 of a plurality of (three) projection downwards on downside surface 62, they equidistantly distribute on circumferentially.A plurality of jaws 66 engage with jaw 41, with this secondary spool 4 are integrally connected on the connector part 6.

One high-pressure tower cap 7 is set at the lower end of solenoid housing 2, and it has a turriform housing 70 and a HV Terminal 71.

Turriform housing 70 is cylindric, and is formed from a resin, and is shaped on a leader 72 in the upper end of turriform housing 70, and this part is inside projection.HV Terminal 71 is inserted in the leader 72, keeps thereby obtain the location.In the lower end of turriform housing 70, insert a spark plug cap of making by rubber.

HV Terminal 71 is made of metal, and the cylindrical shape of sealing for top.Be shaped on a projection 75 on the HV Terminal 71, its center at the blind end uper side surface projects upwards, and is inserted in the lower end of secondary spool 4.The bottom of terminal 71 and spark plug terminals 201 couple together, and hereinafter will the details of this structure be described.

Be packed into epoxy resin 8 in the space that between solenoid housing 2 and turriform housing 70, forms.The mixture of being made up of epoxy prepolymer and curing agent is expanded part 20 and is injected in the space between solenoid housing 2 and the turriform housing 70 from first of solenoid housing 2, and this space is in advance by vacuum pumping, then, mixture hardens in the space, thus, epoxy resin 8 is connected with each other each parts, and has guaranteed the insulating properties between each parts.

To introduce the course of work of this igniter below.One control signal is input in the igniter 65 through connector part 64, thereby makes primary current flow through elementary winding 30.When the electric current in the elementary winding 30 is cut off, in secondary winding 40, produce a high pressure owing to the mutual inductance effect, this high pressure utilizes HV Terminal 71 to pass to spark plug 200 subsequently.The result is exactly to produce a pilot spark at the spark gap place of spark plug 200.

Introduce sealing device 150 with reference to Fig. 2 and Fig. 3 below according to first execution mode.Fig. 2 is the cutaway view of an amplification, has represented sealing device 150 and associated components thereof, and Fig. 3 A and Fig. 3 B have then further represented first lid 103 of sealing device 150 and valve mechanism cover 100 enlargedly.

Fig. 3 A has represented a kind of like this state: ignition coil 1 will be inserted in the consent 101, situation when Fig. 3 B has represented then that ignition coil 1 will be deviate from from consent 101, the state before sealing device 150 is in being inserted into consent 101 has been represented in double dot dash line among the figure, and solid line then represented to be inserted into the sealing device 150 in the consent 101.

In Fig. 2, sealing device 150 comprises a columnar seal 151, it is disposed in solenoid housing 2 second and expands the peripheral part of part 22, and on the outer peripheral face of cylindrical shape seal 151, be shaped on seal convexity 152 of many (three) annular along the longitudinal direction.When igniter was inserted in the consent 101, the outer circumference end 155 of seal convexity 152 contacted with the inner surface of first lid 103.

It is asymmetrical that seal convexity 152 is made into respect to the vertical of sealing device 150, that is to say, first (on) top angle θ between sealing surfaces 153 and first lid, 103 inner surfaces is made greater than the bottom angle ψ between the inner surface of second (descending) sealing surfaces 154 and first lid 103.For example, in this embodiment, θ is 90 degree, and ψ is 30 degree.

Can understand from introduction above: above-mentioned top (first) angle and bottom (second) angle are the angles that records in the plane through sealing device 150 longitudinal axis.

When ignition coil was inserted in the consent 101, because the bottom angle is 30 above-mentioned degree, seal convexity can not blocked by the inner surface of first lid 103.That is to say that as shown in Figure 3A, when ignition coil was inserted in the consent 101, peripheral end 155 deformed and makes progress, moves inward, thereby had prevented the increase of surface pressing.The result is exactly easily ignition coil to be inserted in the consent.

On the other hand, when ignition coil 1 was deviate from from consent 101, because the top angle is configured to 90 above-mentioned degree, seal convexity 152 can be blocked by the inner surface of first lid 103.That is to say, shown in Fig. 3 B, peripheral end 155 downward, outwards distortion, thus increased surface pressing.The result is exactly, and is difficult to ignition coil is deviate from from consent 101, so just can prevent that ignition coil from easily deviating from from consent owing to be subjected to oscillating action in engine working process.

(remodeling of first execution mode)

Fig. 4 has represented a kind of remodeling of sealing device 150, and the difference of execution mode is the structure of seal convexity 152 among itself and Fig. 2.In this remodeling, top angle θ is 120 degree, and bottom angle ψ is 60 degree.Adopt this Transform Type design, can obtain the effect identical with execution mode shown in Figure 2.

(the another kind remodeling of first execution mode)

Although do not illustrate in the drawings, other any type of remodeling also is feasible.By way of example, the sealing device 150 in the execution mode shown in Figure 2 can be broken down into three independently elements, all has seal convexity 152 on each element.And can make three annular grooves on solenoid housing 1 second expands the outer peripheral face of part 22, like this, each potted component 150 all can be maintained by these annular grooves.The result is exactly to obtain the effect identical with first execution mode.

(second execution mode)

With reference to Fig. 5 and Fig. 6 second execution mode is introduced below.Situation when Fig. 6 A has represented that ignition coil 1 is being inserted in the consent 101, situation when Fig. 6 B has represented that ignition coil 1 is being deviate from from consent 101, wherein, double dot dash line represented the state before sealing device 150 is in being inserted into consent 101, and solid line has been represented the state after sealing device is in be inserted into consent 101.

According to the mode identical with Fig. 2 execution mode, the sealing device 150 in this execution mode comprises a columnar seal 156 and many seal convexities 152.

Expand on the outer peripheral face of part 22 second, be shaped on case protrusion 23 of a plurality of (three) annular in the vertical.It vertically is asymmetrical that case protrusion 23 also is made into respect to what expand part 22, that is to say, second expand part outer surface 26 (its longitudinal direction) and first (on) the top angle [alpha] of surface between 24 be greater than the bottom angle beta between second (descend) surperficial 25 and the outer surface 26 (longitudinal direction).In this embodiment, α for example is 150 degree, and β is 90 degree.

In a longitudinal direction, be shaped on many (three) annular grooves 157 on the inner peripheral surface of cylindrical shape seal 156.Case protrusion 23 engages with annular groove 157 respectively.According to the mode identical with case protrusion 23, it is asymmetrical that annular groove also is made into respect to the vertical of cylindrical shape seal 156, that is to say, one first (on) surface 158 is made into greater than the bottom angle beta between one second (descending) surperficial 159 and seal 156 axis with top angle [alpha] between seal 156 axis.For example, in this embodiment, angle [alpha] is 150 degree, and β is 90 degree.The outermost part (bottom) of annular groove 157 lays respectively on more such positions: they are lower than peripheral end 155 positions corresponding on the seal convexity 152, that is to say, annular groove 157 is than (annular) seal convexity 152 more close spark plugs.

When ignition coil 1 was inserted in the consent 101, owing to be provided with the bottom angle of 30 above-mentioned degree, seal convexity 151 can not blocked by the inner surface of first lid 103.That is to say, as shown in Figure 6A, when ignition coil is inserted in the consent 101, peripheral end 155 upwards, to internal strain, thereby can prevent the increase of surface pressing.In addition, the lower surface 25 of case protrusion 23 is gone up the lower surface 159 that pushing tow annular groove 157 in direction of insertion (downward direction).The result is exactly that ignition coil 1 can be easily inserted in the consent.

On the other hand, when ignition coil 1 is deviate from from consent 101, be 90 degree like that owing to the top angle is as indicated above, seal convexity 152 can be blocked by the inner surface of first lid 103.That is to say, shown in Fig. 6 B, peripheral end 155 downward, outwards distortion, thus increased surface pressing.In addition, the upper surface 26 of case protrusion 23 is upwards, pushing tow the upper surface 158 of annular groove 157 on the outside direction.The result is exactly, and ignition coil is difficult to deviate from from consent 101, so just can prevent that ignition coil from easily being deviate from from consent owing to vibrate in engine working process.

(remodeling of second execution mode)

Fig. 7 has expressed second of a kind of remodeling of sealing device 150 and solenoid housing 1 and has expanded part 22, and the difference of execution mode is the structure of annular groove 157 and case protrusion 23 among this remodeling and Fig. 5.

In this remodeling, bottom angle beta and second (descending) surface 159 of second (descending) surface 25 and outer surface 26 (longitudinal direction) and the bottom angle beta between seal 156 axis are 60 degree.Adopt this remodeling, can obtain the effect identical with Fig. 5 execution mode.

(the another kind remodeling of second execution mode)

Fig. 8 has represented that second of the another kind remodeling of sealing device 150 and solenoid housing 1 expands part 22, and they are different from the execution mode among Fig. 4.

As shown in Figure 8, expand second and to make the protruding 23a of an annular on part 22 outer peripheral faces, and make the annular groove 157a of a correspondence on sealing device 150 inner surfaces, remaining structure is identical with execution mode among Fig. 4.Adopt this Transform Type design, also can acquisition and Fig. 4, effect that 5 illustrated embodiment are identical.

(the 3rd execution mode)

With reference to Fig. 9 the 3rd execution mode is introduced below, this execution mode and execution mode shown in Figure 2 are similar.

As shown in Figure 9, on first lid 103, make a step part 106, thereby make consent 101 diameters that the bottom (large-diameter portion branch) by first lid 103 forms diameter greater than first lid, 103 tops (path part).The mould of making first lid 103 is to be made of at least two moulds that separate, and wherein, the boundary line of these divided mould is corresponding to step part 106.Therefore, there is no need on mould, to be provided with corresponding step part.

One of them projection (160) in the seal convexity 152 is positioned at the position of below, and it is made into like this: the diameter of protruding 160 peripheral ends in below is slightly greater than the diameter of other two projectioies 152.Under ignition coil was inserted into situation in the consent 101, the peripheral end of below projection 160 contacted with the inner surface of first lid, 103 bottoms (large-diameter portion branch), and the upper surface 153 of below protruding 160 contacts with the step part of first lid 103.

According to above-mentioned execution mode, can obtain the effect identical with Fig. 2, in addition, owing to have engagement relationship between projection 160 and the step part 106, ignition coil can be firmly held in the consent 101 more.

(remodeling of the 3rd execution mode)

Figure 10 and Figure 11 have represented a kind of remodeling of the 3rd execution mode, and the difference of itself and execution mode shown in Figure 9 is that second of sealing device 150, solenoid housing 1 expands the structure of part 22 etc.

Figure 10 has represented that ignition coil 1 is being inserted into the state in the consent 101, is inserted in the consent 101 and by its state that is keeping and Figure 11 has represented ignition coil 1.

As shown in figure 10, expand second and to be shaped on a pair of annular groove 27 on the outer peripheral face of part 22, it is positioned at second lower end of expanding part, and in Figure 10, the cross-section structure of these annular grooves 27 is the shallow slot of arc.

The internal diameter of sealing device 150 lower ends is made into the internal diameter greater than other (top) part, thereby, when second of solenoid housing expands part 22 when being inserted in the sealing device 150, form the space 182 of an annular.

Number designation 180 refers to a ring body of being made by elastomeric material, and its upper end has the jaw 181 of inside projection.The cross-section structure of ring body 180 is L shaped, and the lower end seat of ring body 180 is pressed on the step part 102.

In Figure 10, ignition coil is in the state that just is inserted into consent 101, and the upper end 181 of ring body 180 is inserted in the space 182, thereby jaw 181 is engaged with a certain annular groove 27 on outer peripheral face.In this process, because space 182 still exists, the seal convexity 160 of below can easily be out of shape to space 182.The result is exactly that ignition coil can easily be inserted.

As shown in figure 11, when ignition coil further was inserted in the consent 101, the lower end of ring body 180 became with step part 102 and contacts, and then, the upper end 181 of ring body 180 is inserted in the space 182 further.At last, jaw 181 becomes with another annular groove 27 and engages, and space 182 is filled by the upper end of ring body 180.Along with moving downward of sealing device 150, the pressure that acts on the below seal convexity 160 has been increased, this pressure with projection 160 outside pushing tows to first lid 103.

As shown in figure 11, when ignition coil was fully inserted in the consent, according to the mode identical with Fig. 9, the seal convexity 160 of below engaged with step part 106, thereby is keeping ignition coil securely by consent 101.

(the 4th execution mode)

With reference to Figure 12 and Figure 13 the 4th execution mode is introduced below, this execution mode and execution mode shown in Figure 2 are similar.

Figure 12 has represented that ignition coil is being inserted into the state in the consent 101, is inserted in the consent 101 and by its situation that is keeping and Figure 13 has represented ignition coil.

Second outer peripheral face that expands part 22 is taper, therefore, its diameter dwindles on the direction of part lower end gradually expanding towards second, is shaped on a plurality of (three) sunk part 28 on outer peripheral face, they equidistantly distribute on circumference, and are positioned at the middle part in the vertical.

Because second outer peripheral face that expands part 22 is taper, thereby expand space 162 of formation between the inner surface of taper outer peripheral face and sealing device 150 of part 22 second.

Number designation 190 refers to the jaw member that a usefulness metal or synthetic resin are made, and it has one and is inserted into last claw portion 191 in the sunk part 28, at sealing device 150 vertical upwardly extending arm body portions 192 and claw portion 193 once.When the right side of Figure 12 is observed, jaw member 190 is a T shape.Corresponding with the number of sunk part 28, be provided with three jaw member 190.

Following claw portion 193 is positioned in the lower end of sealing device 150, and be subjected to arm body portion 192 the spring force effect and by short top laterally.Before ignition coil was inserted in the consent 101, the outer end of following claw portion 193 outwards protruded in the peripheral end of seal convexity 152.

In Figure 12, ignition coil is being inserted in the consent 101, and following claw portion 193 is inwardly pushed away, and jaw member 190 is moved downward with sealing device 150.

As shown in figure 13, when ignition coil is done when being inserted in the consent 101, following claw portion 193 outwards ejects, and become with first,

second lid

103 and 105 between the annular groove 104a that forms engage.

As mentioned above,, can finish easily that ignition coil is inserted into operation in the consent, and ignition coil is securely held in the consent, thereby is difficult to it is deviate from from consent according to this execution mode.

(the 5th execution mode)

Figure 14 represented according to the 5th execution mode of the present invention, and the difference of itself and execution mode shown in Figure 2 is the structure of first lid 103 and sealing device 150.

The inner surface of first lid 103 is a conical surface, thereby its diameter is increasing on the direction of first lid, 103 lower ends gradually.The inner surface of first lid 103 is not defined as straight line, and it also can be a curve shape.Owing to be provided with conical surface (just having formed the wedge shape effect), sealing device 150 can be securely held in first lid 103.

(the 6th execution mode)

Figure 15 and Figure 16 have represented the 6th execution mode of the present invention.

The sealing device 150 of this execution mode shown in Figure 15 is similar to the execution mode among Fig. 2, and difference only is that the sealing device 150 in this execution mode has two seal convexities 152, and the sealing device 150 among Fig. 2 then has three seal convexities 152.

Be shaped on a sealing leader 22a at second lower end that expands part 22, wherein, the diameter of sealing leader 22a outer circumference end is made the outer circumference diameter greater than seal 151.In addition, sealing leader 22a outer circumference end is separated certain distance with the inner surface of first lid 103.That is to say, at consent 101 in the radial direction, form a little gap between the inner surface of sealing leader 22a peripheral end and consent 101.

When ignition coil is inserted in the consent 101, sealed device 150 elasticity of ignition coil and keeping securely, more definite, it sealed protruding 152 is keeping, seal convexity 152 flexibly is pressed on second and is expanded between the inner surface of the part 22 and first lid, wherein, seal convexity 152 has been applied certain pressure.

When ignition coil is vibrated and is moved in the drawings the horizontal direction, its in the horizontal direction amount of exercise be restricted to a certain amount ofly, this amount of exercise equals to seal the peripheral end of leader 22a and the space (gap) between first lid, 103 inner surfaces.

Figure 16 has represented a kind of remodeling of the 6th execution mode, and the difference of itself and execution mode shown in Figure 15 is: be shaped on a sealing leader 22b at second upper end that expands part 22.Adopt such design, also can obtain same effect.

(structure of high-voltage connection device)

Perspective representation among Figure 17 the head of a kind of high-voltage connection device 76 and spark plug 200, among the figure, the two is not assembled as yet.

HV Terminal 71 (see figure 1)s have high-voltage connection device 76.In Figure 17, the top of HV Terminal 71 has been cut.High-voltage connection device 76 is with metal, and is drum, and a slit 77 extends on it is vertical, thereby makes outwards Zhang Zhankai of cylindrical wall part.The lower end of this cylindrical wall part is made into the vestibule of bugle shape.In a circumferential direction, on cylindrical wall, make the fenestra 79 of a plurality of (three) break-through with the spacing that equates.

On the outer peripheral face of cylindrical wall, be provided with the ring body 90 of a C shape, it is made by spring steel.On the inboard of ring body 90, be shaped on a plurality of (three) projection 91, and make these projectioies 91 to engage with the fenestra 79 of break-through, projection 91 further projection to the inside of cylindrical wall.

HV Terminal 71 (high-voltage connection device 76 and ring body 90) is being assembled in the process on the spark plug 200, owing to be shaped on slit 77 on cylindrical wall, and ring body 90 is C shape, and the lower end of bugle shape vestibule is easy to outwards open.Therefore, spark plug terminals 201 are easy to be inserted in the inside of HV Terminal 71.

Can be clear that from Fig. 1 after the two was assembled into together, projection 91 engaged with annular groove 202 on spark plug terminals 201.

(remodeling of high-voltage connection device)

Schematic diagram among Figure 18 has been represented a kind of remodeling of high-voltage connection device 76.

High-voltage connection device 76 is with metal, and has a cylindrical wall that has a slit 77.Downside at cylindrical wall is shaped on a plurality of (three) supporting leg part 80, and they extend in the vertical, and each supporting leg part 80 all has a bending part that bends inwards 81, thereby bending part 81 can be engaged with the annular groove 202 of spark plug head.

At the peripheral part of cylindrical wall, be provided with a C shape ring body 92 equally, it is made with spring steel, is used to limit the outside bending amount of supporting leg part 80, makes it be no more than necessary amount.

Adopt the Transform Type design of above-mentioned high-voltage connection device 76, can obtain the effect identical with Figure 17.

(the 7th execution mode)

In the above-described embodiment, especially at Fig. 1 in the accompanying drawing of Figure 16, the structure that is used for igniter (ignition coil 1) is firmly remained on consent 101 is introduced, wherein, second expands part is being kept by valve mechanism cover 100.

Figure 19 has represented the 7th execution mode to Figure 21, in this embodiment, expand part 20 places first, ignition coil is securely held on the valve mechanism cover 100, wherein, perspective representation among Figure 19 be assembled into ignition coil on the valve mechanism cover 100, Figure 20 is the vertical view of ignition coil, the front view among Figure 21 has been represented the part of ignition coil and valve mechanism cover 100.

As shown in figure 21, in the both sides of consent 101, be shaped on pair of sidewalls part 107 on the end face of valve mechanism cover 100.That is to say that two side part 107 is opposed mutually across consent 101.

Expand first and to be provided with a pair of sealing device 210 between the medial surface of the outer surface of part 20 and two side part 107.

Similar with the execution mode among Fig. 2, each sealing device 210 all has a seal 211 and a plurality of (three) projection 212.

It vertically is asymmetric with respect to ignition coil that projection 212 is made into, that is to say, first (on) surface 213 is designed to greater than a bottom angle between second (descending) surperficial 214 and sidewall sections 107 sides with a top angle between sidewall sections 107 sides.In this embodiment, according to the mode identical with Fig. 2 execution mode, the top angle for example is 90 degree, and the bottom angle is 30 degree.

Be mounted under the situation of consent 101 in igniter (ignition coil 1), sealing device 210 is maintained at first and expands between the pair of sidewalls part 107 of part 20 and valve mechanism cover, wherein, sealing device 210-especially many projectioies 212 is squeezed, thereby can expand the part place first igniter is firmly held on the valve mechanism cover.The result is exactly that even under the vibrative situation of engine, ignition coil also is difficult to.

Can find out that from Figure 19 to Figure 21 one first housing parts (comprise solenoid housing 2 and second expand part 22) is inserted in the consent 101, second housing parts (first expand part 20) then projects into outside the valve mechanism cover 100.

(the 8th execution mode)

Figure 22 and Figure 23 have represented a kind of remodeling, and in this remodeling, ignition coil is securely held on the spark plug 200.

Made a jockey 300a with metal, it has the protruding 304a of a cylinder 301a and a circle, and protruding 304a is formed in the upper end of cylinder 301a, wherein, circular protrusions 304a is inwardly outstanding, so that can engage with the annular groove on turriform housing 70 outer peripheral faces.Therefore, jockey 300a is connected on the turriform housing 70 fastenedly.

Lower end at cylinder 301a is shaped on a plurality of (three) supporting leg part 302a, they jockey 300a vertically on extend, and in a circumferential direction, supporting leg part 302a is equally spaced.In the lower end of supporting leg part 302a, also formed jaw part 303a, its inside projection, thus can engage with the annular groove 205 on spark plug 200.

Spark plug 200 comprises spark plug terminals 201 and the spark-plug body 203 that is positioned at its top, housing 203 is included in electric installation wherein, electric installation wherein be exposed to the indoor pair of electrodes of engine combustion (central electrode and grounding electrode) and couple together.Be shaped on a threaded portion 206 on spark-plug body 203, spark plug 200 utilizes this threaded portion to be screwed in the engine.Above threaded portion 206, form a hex bolts 204 on the spark-plug body 203, thereby between threaded portion 206 and hex bolts 204, form an annular groove 205.

Supporting leg part 302a can flexibly outwards be bent, thereby spark plug 200 can be easily inserted among the jockey 300a, and at this moment, jaw part 303a will engage with annular groove 205.

As mentioned above, utilize jockey 300a that ignition coil is fixed firmly on the spark plug 200, make it be difficult to from consent, deviate from.

Figure 24 has represented a kind of remodeling of jockey shown in Figure 22.

Jockey 300b is with metal, and it has the inwardly outstanding C clamp claw portion 303b of cylinder 301b and of a C shape.Although not shown in the drawings,, also formed inwardly outstanding projection at the upper end of cylinder 301b, thereby jockey 300b can be securely fixed on the turriform housing 70 according to the mode identical with Figure 22.

Inwardly the annular groove 205 of formation engages between the jaw part 303b of projection and hex bolts 204 and the threaded portion 206.

Adopt this Transform Type design, can obtain the effect identical with execution mode among Figure 23.That is to say that in assembling process, the lower end of C shape cylinder 301b can flexibly outwards be bent and open, thereby spark plug 200 can be inserted among the jockey 300b.In addition, because jaw part 303b is engaging with annular groove 205, be difficult to ignition coil is deviate from from consent.

Figure 25 has represented the another kind remodeling of jockey shown in Figure 22.

Jockey 300c is with metal, it has a cylinder 301c, a plurality of (three) fenestra 305 and a plurality of (three) supporting leg part 302c, wherein, each supporting leg part 302c extends downwards in the vertical, and its lower end has a jaw part 303c.

Jaw part 303c is inwardly outstanding, thereby jaw part 303c can be engaged with the annular groove 205 of formation between hex bolts 204 and the threaded portion 206.

Although not shown in the drawings, also form the projection of inside projection at the upper end of cylinder 310c, so just jockey 300c can be fixed firmly on the turriform housing 70.

Adopt this Transform Type design, can obtain the effect identical with execution mode among Figure 23.That is to say, can obtain the effect identical with execution mode among Figure 23.That is to say that supporting leg part 302c can flexibly outwards be bent and open, thereby spark plug 200 can be easily inserted among the jockey 300c, and jaw part 303c will engage with annular groove 205.

As mentioned above, utilize jockey 300c that ignition coil is fixed firmly on the spark plug 200, make it be difficult to from consent, deviate from.

In Fig. 1, although first expand part 20 and second and expand part 22 and be represented as the separate part that separates with solenoid housing 2, one also can be made with solenoid housing 2 in their (20,22).

In Fig. 1,, also can a part be included in the solenoid housing 2 these coil parts although central core 5, elementary spool 3, elementary winding 30, secondary spool 4 and secondary winding 40 all fully are included in the solenoid housing 2.By way of example, these coil parts end can be inclusive in the solenoid housing.

In the above-described embodiment, constitute although sealing device 150 is represented as by the individual unit body, also available a plurality of parts constitute sealing device 150.Can select for use several different methods and measure that sealing device 150 is fixed to solenoid housing 2 or expand on

part

20 or 22, that these methods and measure also are is bonding, interference fit, convex-concave joint etc.

Claims

1, a kind of igniter, it is installed on the internal combustion engine of have valve mechanism cover (100) and spark-plug hole (101), and spark-plug hole wherein (101) is formed on the valve mechanism cover (100), and this igniter comprises:

Ignition coil (1), it has an elementary winding (30), a level winding (40) and a solenoid housing (2,20,22), solenoid housing is used at least a portion of elementary winding (30) and secondary winding (40) is contained within it, and ignition coil produces the high pressure that is used to form pilot spark; And

Spark plug (200), it is installed in the spark-plug hole (101), and keeps being electrically connected with secondary winding (40), thus when ignition coil (1) produced high-tension electricity, spark plug produced a discharge spark;

Wherein, igniter also comprises:

Sealing device (150), described sealing device has: a columnar seal (151), described seal are set on the periphery of solenoid housing (2,20,22); The projection (152) of annular, described projection is from the outwards outstanding inner surface to spark-plug hole (101) of cylindrical shape seal (151), thus the outer peripheral portion of the projection of making (152) contacts with the inner surface of spark-plug hole (101), and

Wherein, first angle (θ) that forms between the first surface (153) of annular protrusion (152) and spark-plug hole (101) inner surface is designed to greater than one second angle (ψ), second angle is to form between the inner surface of second surface of annular protrusion (152) (154) and spark-plug hole (101), wherein, first angle and second angle are the angles that records in the plane of the longitudinal axis that comprises sealing device (150), and second surface (154) present position is than the more close spark plug of first surface (153).

2, igniter according to claim 1 is characterized in that: sealing device (150) comprises the projection (152) of a plurality of described annulars.

3, igniter according to claim 1 is characterized in that:

On the outer peripheral face of solenoid housing (2,20,22), be shaped on the case protrusion (23) of an annular; And

The inner surface of sealing device (150) engages with the case protrusion (23) of annular.

4, igniter according to claim 1 is characterized in that:

First angle (θ) is equal to or greater than 90 degree; And

Second angle (ψ) is less than 90 degree.

5, igniter according to claim 1 is characterized in that:

On the outer peripheral face of solenoid housing (2,20,22), be shaped on the case protrusion (23) of annular; And

On the inner surface of sealing device (150), be shaped on annular groove (157), so that annular groove (157) engages with toroidal shell projection (23).

6, igniter according to claim 5 is characterized in that:

Annular groove (157) is formed in the position than the more close spark plug of annular protrusion (152) (200).

7, igniter according to claim 5 is characterized in that:

First angle (α) that forms between the first surface (24) of toroidal shell projection (23) and sealing device (150) longitudinal axis is designed to second angle (β) that forms greater than between the second surface (25) of toroidal shell projection (23) and sealing device (150) longitudinal axis, wherein, first angle (α) that forms between the first surface (24) of toroidal shell projection (23) and sealing device (150) longitudinal axis and be to comprise the angle that records in the plane of longitudinal axis of sealing device (150) in second angle (β) that forms between the second surface (25) of toroidal shell projection (23) and sealing device (150) longitudinal axis, and second surface (25) present position of toroidal shell projection (23) is than the more close spark plug of first surface (24) of toroidal shell projection (23).

8, igniter according to claim 7 is characterized in that:

First angle (α) that forms between the first surface (24) of toroidal shell projection (23) and sealing device (150) longitudinal axis is greater than 90 degree; And

Second angle (β) that forms between the longitudinal axis of the second surface (25) of toroidal shell projection (23) and sealing device (150) is less than or equal to 90 degree.

9, igniter according to claim 1 is characterized in that:

With the contacted spark-plug hole of annular protrusion (152) outer peripheral portion (101) inner surface be taper, thereby the diameter of spark-plug hole (101) inner surface is increasing on the direction of spark plug (200) gradually.

10, igniter according to claim 1 is characterized in that:

Solenoid housing (2,20,22) also comprise a sealing leader (22a, 22b), its be made near sealing device (150) two vertically end one of at least, thereby spark-plug hole (101) in the radial direction, formation one little gap between the inner surface in the outer circumference end of sealing leader (22a) and spark-plug hole (101).

11, igniter according to claim 10 is characterized in that:

Surface pressing on acting on annular protrusion becomes when being higher than a scheduled volume, and described little gap is reduced.

12, a kind of igniter, it is installed to have valve mechanism cover (100), spark-plug hole (101) and is formed on the internal combustion engine of a pair of opposing sidewalls (107) on the valve mechanism cover (100), spark-plug hole wherein (101) is formed on the valve mechanism cover (100), described opposing sidewalls is opposed mutually across spark-plug hole (101), and this igniter comprises:

Ignition coil (1), it has an elementary winding (30), a level winding (40) and a solenoid housing (2,20,22), solenoid housing is used at least a portion of elementary winding (30) and secondary winding (40) is contained within it, ignition coil produces the high pressure that is used to form pilot spark, wherein, solenoid housing (2,20,22) comprise that one is inserted into first housing parts and in the spark-plug hole (101) and protrudes in second housing parts (20) outside the valve mechanism cover (100), second housing parts (20) has a pair of side that is parallel to each other; And

Wherein, igniter also comprises:

A pair of sealing device (210), each sealing device all has: a seal (211), it is set on the corresponding side surface of second housing parts (20); One seal convexity (212), it is from the outstanding inner surface to sidewall (107) of seal (211), thereby the outer peripheral portion (215) of seal convexity (212) is contacted with the inner surface of sidewall (107); And

First angle (θ) that forms between the first surface (213) of seal convexity (212) and sidewall (107) inner surface is designed to greater than one second angle (ψ), second angle is to form between the inner surface of a second surface (214) of seal convexity (212) and sidewall (107), wherein, first angle and second angle are the angles that records in the fore-and-aft plane perpendicular to sidewall (107), and second surface (214) present position is than the more close spark plug of first surface (213).