CN100495601C - Ignition coil - Google Patents
Ignition coil Download PDFInfo
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- CN100495601C CN100495601C CNB2005100229702A CN200510022970A CN100495601C CN 100495601 C CN100495601 C CN 100495601C CN B2005100229702 A CNB2005100229702 A CN B2005100229702A CN 200510022970 A CN200510022970 A CN 200510022970A CN 100495601 C CN100495601 C CN 100495601C
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Abstract
An ignition coil includes a cylindrical portion capable of being inserted into a plughole of an engine case. The cylindrical portion has a base end and a tip end, respectively, in an axial direction of the cylindrical portion. The cylindrical portion has an elastically deformable outer peripheral portion that engages with the plughole to fix an outer periphery of the cylindrical portion with respect thereto.
Description
Technical field
The present invention relates to be used to produce the ignition coil of spark.
Background technology
Ignition coil is installed on the internal combustion engine of vehicle etc.Ignition coil is electrically connected to spark plug to produce spark in the combustion chamber of cylinder.The column type ignition coil have in the consent that inserts engine case cylindrical part and cylindrical part axially on be attached to igniter part on the base portion of cylindrical part.
Cylindrical part holds primary coil and the secondary coil that twines coaxially to each other.The igniter part is to primary coil supply electric energy.
Yet under many circumstances, engine case has a plurality of consents with different inner diameters.Therefore, when ignition coil is installed to engine case, between cylindrical part and consent, just might form the slit.Thereby, according to the size in slit, use the bridging element of different sizes to come bridge joint cylindrical part and consent.
In possibility, for example, JP-A-2004-63986, a kind of ignition coil that is used for internal combustion engine is disclosed, it has the insulation shell that holds primary coil bobbin, secondary coil bobbin and core, wherein the wall thickness of insulation shell is thinner in the connection bracket side that is used for ignition coil is attached to engine case, and thicker at opposite side.Because ignition coil is installed to engine case by insulation shell, even have the Vehicular vibration of ignition coil, ignition coil can not vibrate yet.
Yet, in the ignition coil of JP-A-2004-63986, do not have open relevant cylindrical part to insert content in the consent of different inner diameters with ignition coil.
Summary of the invention
Exemplary embodiment of the present invention has solved aforementioned and other problem.More specifically, exemplary embodiment of the present invention provides the ignition coil in a kind of consent that cylindrical part can be fixed to different inner diameters.
According to an aspect of the present invention, a kind of ignition coil comprises cylindrical part.Cylindrical part comprises primary coil and secondary coil.Described secondary coil is twined coaxially with respect to described primary coil.Cylindrical part can insert in the consent of engine case of internal combustion engine.Cylindrical part has base portion on it is axial.The base portion of cylindrical part has the embedded head link actuator that supplies power to primary coil.
Cylindrical part has taper neighboring part.The tapered portion of cylindrical part has the shape that its thickness reduces towards the end of cylindrical part.The tapered portion of cylindrical part is coupled to the edge of opening of consent, thereby cylindrical part is fixed to consent.
Optionally, cylindrical peripheral limit part has elastic part.The elastic part of cylindrical part can strain.The elastic part of cylindrical part changes its external diameter by inserting consent, thereby cylindrical part is fixed to consent.
Thereby the cylindrical part of ignition coil can be completely fixed consent under the prerequisite that does not have very big slit, so ignition coil can positively be installed in the cylinder of internal combustion engine, even cylindrical part is inserted into the various consents of different inner diameters.
Description of drawings
From the following detailed description, claims and the accompanying drawing that constitute the application's part, can understand characteristics and the advantage of embodiment, and the method for operation of associated components and effect.In the accompanying drawings:
Fig. 1 is the partial cross-sectional side view according to the amplification of first exemplary embodiment, and it shows the ignition coil with tapered portion before the consent that inserts engine case;
Fig. 2 is the cross-sectional side view that illustrates according to the ignition coil of first exemplary embodiment;
Fig. 3 is the cross-sectional side view according to first exemplary embodiment, and it shows the ignition coil after the consent that inserts engine case;
Fig. 4 is the partial cross-sectional side view according to the amplification of first exemplary embodiment, and it shows the ignition coil with tapered portion after the consent that inserts engine case;
Fig. 5 is the partial cross-sectional side view according to first exemplary embodiment, and it shows the ignition coil of the tapered portion with first modification before the consent that inserts engine case;
Fig. 6 is the cross-sectional side view according to the amplification of first exemplary embodiment, and it shows the ignition coil of the tapered portion with second modification after the consent that inserts engine case;
Fig. 7 is a partial cross-sectional side view, and it shows the ignition coil that has elastic part according to second exemplary embodiment;
Fig. 8 illustrates the end view of ignition coil that has the elastic part of modification according to second exemplary embodiment;
Fig. 9 illustrates the end view that has the ignition coil of protrusion tab according to the 3rd exemplary embodiment;
Figure 10 illustrates the end view of ignition coil that has the protrusion tab of modification according to the 3rd exemplary embodiment;
Figure 11 illustrates the end view that has the ignition coil of metal bobbin according to the 4th exemplary embodiment.
Embodiment
As shown in Figures 1 to 3, ignition coil 1 is electrically connected to produce spark in the combustion chamber of cylinder of internal-combustion engine with spark plug 6.Ignition coil 1 comprises cylindrical part 2 and igniter part 3.Cylindrical part 2 holds the primary coil 21 and the secondary coil 22 of twining coaxially to each other.Cylindrical part 2 inserts in the consent 71 of engine case 7.Cylindrical part 2 includes axial base 202, and it has the igniter part 3 as embedded head link actuator.Igniter part 3 includes connector and supplies electric energy to primary coil.
Tapered portion 34 is connected to the neighboring of cylindrical part 2.Being shaped as of tapered portion 34, its radial thickness little by little reduces towards the end (towards axial end part 201) of cylindrical part 2.Tapered portion 34 is installed to the edge of opening 711 of consent 71, thereby cylindrical part 2 is fixed to consent 71.
Below will describe the structure of the ignition coil 1 of first exemplary embodiment in detail.
As shown in Figure 2, cylindrical part 2 is made of the solenoid housing 20 that wherein is inserted with primary coil 21, secondary coil 22 and core 23.
Particularly, primary coil 21 is made of the primary wires 212 that covers with electrical insulating material.The primary wires 212 of primary coil 21 is wrapped on the neighboring of columniform elementary bobbin 211.
Secondary coil 22 is made of the secondary lead 222 that covers with electrical insulating material.The secondary lead 222 of secondary coil 22 is wrapped on the neighboring of columniform secondary bobbin 221.The all numbers of the winding of the secondary lead 22 of secondary coil 22 are greater than the winding week number of primary coil 21.
Secondary coil 22 is inserted in the inner rim of primary coil 21, so that core 23 is disposed on the inner periphery side of secondary coil 22.The electromagnetic steel plate of column (such as silicon steel plate) constitutes core 23 by being roughly.Primary coil 21 inserts cylindrical coil housing 20.Metal bobbin 24 is connected to the periphery avris of solenoid housing 20.Metal bobbin 24 is made of electromagnetism steel (such as silicon steel plate).
Optionally, primary coil 21 can adopt and not use the following manner of elementary bobbin 211 to constitute.That is to say that the primary wires that is covered by electrical insulating material is wound for cylindrical, the lead of Chan Raoing is combined into cylindrical by bonding medium etc. subsequently.
As shown in Figure 2, electric insulation resin be packed into the slit that is formed between core 23 and the secondary coil 22, be formed at the slit between secondary coil 22 and the primary coil 21 and be formed at primary coil 21 and solenoid housing 20 between the slit.
Igniter part 3 comprises igniter case 30 and igniter 31.Igniter case 30 is connected to axial base 202.Igniter case 30 is formed from a resin.Igniter 31 is installed in the igniter case 30.Igniter 31 supplies power to primary coil 21.Igniter case 30 is filled with electric insulation resin under igniter 31 is arranged on situation in the igniter case 30.Igniter 31 includes electrical energy control circuit and ionic current testing circuit.Electrical energy control circuit is by handling from the signal of electronic control unit (ECU) transmission.Ionic current flow between the electrode of ionic current testing circuit detection spark plug 6.
Shown in Fig. 2,3, the solenoid housing 20 at axial end part 201 places of cylindrical part 3 has plug installing hole 25, and spark plug 6 is installed in this plug installing hole.Plug installing hole 25 is provided with HV Terminal 26 and helical spring 27.HV Terminal 26 is electrically connected with an end (high-pressure side) of secondary coil 22.Helical spring 27 contacts with an end of secondary coil 22 by HV Terminal 26.
When ECU when igniter 31 output sparks produce signals, the switch element in the igniter 31 produces the electric energy that is delivered in the primary coil 21, so secondary coil 22 produces induced electromotive force (back electromotive force) by electromagnetic induction.Thereby spark plug 6 can produce spark.
As shown in Figure 2, igniter part 3 has flange portion 32 and connector part 33.Flange portion 32 is radially outward outstanding with respect to cylindrical part 2.Flange portion 32 has screw jack 321, and a bolt inserts and is tightened onto on the engine case 7 thus.Connector part 33 is radially outward outstanding with respect to cylindrical part 2.Connector part 3 is electrically connected with external power source.
As shown in Figure 1, igniter partly has ring portion 341, and it is connected to the neighboring of cylindrical part 2.Ring portion 341 has annular shape.Tapered portion 34 is made of a plurality of tapering parts 342 that are projected into axial end part 201.These a plurality of tapering parts 342 have the shape that its external diameter reduces gradually towards axial end part 201.Tapering part 342 is formed from a resin and is integrated into igniter part 3.
As shown in Figure 4, each tapering part 342 forms in inner periphery side and has ledge surface 344.Ledge surface 344 forms a gap 345 between the outer periphery surface (being the neighboring of metal bobbin 24) of corresponding tapering part 342 and cylindrical part 2 in first exemplary embodiment.Each tapering part 342 can tilt towards inner periphery side from the root of ledge surface 344 as pivoting point.
And as shown in Figure 1, tapered portion 34 also is formed with a plurality of notch portion 343, and it is being formed between the tapering part 342 on circumferencial direction of cylindrical part 2.Notch portion 343 makes that tapering part 342 is easier and flexibly tilts.
In addition, tapered portion 34 can form independently with igniter part 3.
As shown in Figure 4, when ignition coil 1 inserted consent 71, the taper outer periphery surface of each tapering part 342 of tapered portion 34 nestled up the edge of opening 711 of consent 71.When ignition coil 1 was further promoted in consent 71, just the inboard towards each tapering part 342 produced load.This load causes tapered portion 34 distortion so that tapered portion 34 caves in partly in the position of the edge of opening 711 of consent 72 (first distortion), and from ledge surface 344 as the root of pivoting point towards inner periphery side tilt (second distortion).
First distortion is because the elastic force of the material of tapered portion 34 causes.On the other hand, second distortion produces by form gap 345 between each tapering part 342 and cylindrical part 2.Thereby when ignition coil 1 was installed to engine case 7, because first and second distortion, tapered portion 34 just can fully cooperate with the edge of opening 711 of consent 71.
When the flange portion 32 of bolt insertion point firearm part 3, and when ignition coil 1 was installed to engine case 7, first and second distortion according to tapering part 342 just produced reaction forces by each tapering part 342 towards consent 71.Thereby ignition coil 1 is fixed to consent 71 under the situation that does not have big slit, and vibration and wearing and tearing that therefore can restriction point fire coil 1 be even affact ignition coil 1 such as the external force from this class of vibration of engine.
Also can change the edge of opening 711 of the deflection of tapered portion 34 external diameters, so cylindrical part 2 can be fixed to the various consents 71 of different inner diameters with cooperation consent 71.Thereby, can be limited between consent 71 and the cylindrical part 2 slit that forms, so cylindrical part 2 can stably be installed to consent 71, even cylindrical part 2 is inserted into the various consents 71 of different inner diameters.
According to the ignition coil of first exemplary embodiment shown in Fig. 1 to 4, cylindrical part 2 also can be fixed to the various consents 71 of different inner diameters, and does not have big slit between cylindrical part 2 and consent 71.
Fig. 5 shows a modification of first exemplary embodiment.As shown in Figure 5, tapered portion 134 can be made of conical ring part 346, and wherein the thickness of conical ring part is reducing on the direction of axial end part 201, and does not have notch portion.According to this modification of first exemplary embodiment, although conical ring part 346 more is difficult to distortion, conical ring part 346 can become big from the power of edge of opening 711 receptions of consent 71.Thereby, the further vibration of restriction point fire coil 1 and wearing and tearing.
As another possibility, can not form the gap 345 between the neighboring of each tapering part 342 and cylindrical part 2 among Fig. 4.As shown in Figure 6, each tapering part 442 of tapered portion 234 is formed substantially and contacts with the neighboring of cylindrical part 2.
In second modification of first exemplary embodiment, although each tapering part 342 tilts hardly, tapering part 342 caves in partly in the position of the edge of opening 711 of consent 71.Thereby ignition coil 1 is not fixed to consent 71 with having the slit.And, also can simplify the molding die that is used for tapered portion 34.
In second exemplary embodiment, replace shown in Fig. 1 to 6 that tapered portion 34 is mutually integratedly with igniter part 3, ignition coil 1 includes the elastic part 5 on the neighboring that is positioned at cylindrical part 2, as shown in Figure 7.Elastic part 5 can strain.
Optionally, as shown in Figure 8, in a modification of second exemplary embodiment, elastic part 5 can be connected on the neighboring of mid portion of cylindrical part 2 (metal bobbin 24), so that elastic part 5 can insert and be coupled to the inner periphery side of consent 71.
And the elastic part 5 among Fig. 7,8 is the elastomers 5 on the neighboring of cylindrical part 2.Elastomer 5 is made of the elastomeric material of energy strain.When cylindrical part 2 inserted the inner opening edge 711 of consent 71, elastomer 5 can change the elastic deformation amount.
In addition, when cylindrical part 2 inserted the inner opening edge 711 of consent 71, the elastic part 5 among Fig. 7,8 can change its external diameter.Therefore, elastic part 5 can change the elastic deformation amount, and therefore just can change its external diameter according to the internal diameter of consent 71, even the cylindrical part 2 of ignition coil 1 is inserted in the various consents 71 of different inner diameters.Thereby it can be limited between consent 71 and the cylindrical part 2 and form the slit, so cylindrical part 2 can stably be installed to consent 71, even cylindrical part 2 is inserted into the various consents 71 of different inner diameters.
Therefore, according to the ignition coil 1 of second exemplary embodiment (Fig. 7 and Fig. 8), cylindrical part 2 also can be fixed to the various consents 71 of different inner diameters, and does not have big slit between cylindrical part 2 and consent 71.
In second exemplary embodiment, the structure outside the above-mentioned elastic part can be equal to the structure among first embodiment.
Fig. 9 shows the 3rd exemplary embodiment.As shown, elasticity protrusion tab 28 is located on the neighboring of cylindrical part 2.Protrusion tab 28 has from outwards outstanding near the solenoid housing 20 and towards the ledge 281 of the axial base 202 of cylindrical part 2.When cylindrical part 2 was inserted into consent (not shown among Fig. 9), protrusion tab 28 can change its inclined degree.
On the other hand, in a modification of the 3rd exemplary embodiment, as shown in figure 10, protrusion tab 128 also can form flexible skirt 481, and it is annular outwards outstanding and that tilt, and does not form a plurality of notch portion 282.
In Fig. 9,10 the 3rd exemplary embodiment, protrusion tab 28,128 can change its inclined degree according to the internal diameter of consent, even the cylindrical part of ignition coil 2 is inserted into the various consents of different inner diameters.Therefore, it can be limited between consent and the cylindrical part 2 and form the slit.
In the 3rd exemplary embodiment, the structure outside the above-mentioned protrusion tab also can be equal to the structure among first embodiment.
Figure 11 shows the 4th exemplary embodiment.As shown, elastic metallic bobbin 24 is connected to the neighboring of cylindrical part 2.Metal bobbin 24 cylindrical part 2 axially on have slit 241.When cylindrical part 2 inserted the consent (not shown), metal bobbin 24 can change its external diameter.
In the 4th exemplary embodiment, the structure outside the above-mentioned protrusion tab also can be equal to the structure among first embodiment.
The present invention should be not limited to disclosed exemplary embodiment, but can otherwise implement under the premise without departing from the spirit of the present invention.
Claims (10)
1. an ignition coil (1), it comprises:
Cylindrical part (2), it comprises primary coil (21) and secondary coil (22), described secondary coil is twined coaxially with respect to described primary coil (21);
Wherein cylindrical part (2) can insert in the consent (71) of engine case (7) of internal combustion engine,
Cylindrical part (2) has base portion (202) on it is axial,
The base portion (202) of cylindrical part (2) has the embedded head link actuator (3) for primary coil (21) supply electric energy,
Cylindrical part (2) has the neighboring part (34,134,234,5,28,128,24) of elastically deformable,
When neighboring part (34,134,234,5,28,128,24) was coupled to consent (71), neighboring part (34,134,234,5,28,128,24) changed its external diameter, thereby cylindrical part (2) is fixed to consent (71),
Described neighboring part (34,134,234,28,128) has annular section (341,234,28) and a plurality of ledge (342,442,281),
Described a plurality of ledge (342,442,281) axially going up at cylindrical part (2) from annular section (341,234,28) outstanding, described a plurality of ledges (342,442,281) at least two in have gap (343,282) on the circumferencial direction of cylindrical part (2) between them.
2. according to the ignition coil (1) of claim 1, it is characterized in that neighboring part (34,134,234,5,28,128,24) is an annular.
3. according to the ignition coil (1) of claim 1, it is characterized in that,
Described neighboring part (134,128) has annular section (341,128) and ledge (346,481),
Described ledge (346,481) cylindrical part (2) axially go up from annular section (341,128) outstanding and
Ledge (346,481) forms on the circumferencial direction of cylindrical part (2) continuously.
4. according to the ignition coil (1) of claim 1, it is characterized in that,
Described neighboring part (5,28,128) be place on the neighboring of cylindrical (2) elastomer (5,28,128) and
Elastomer (5,28,128) changes its elastic deformation amount by being coupled to consent (71), thereby cylindrical part (2) is fixed to consent (71).
5. according to the ignition coil (1) of claim 1, it is characterized in that,
Described neighboring part (28,128) comprises the protrusion tab (28,128) on the neighboring that is positioned at cylindrical part (2),
Protrusion tab (28,128) comprise at least one ledge (281,481) outwards outstanding and that tilt towards the base portion (202) of cylindrical part (2) and
Ledge (281,481) changes its inclined degree by being coupled to consent (71), thereby cylindrical part (2) is fixed to consent (71).
6. according to the ignition coil (1) of claim 1, it is characterized in that,
Described cylindrical part (2) includes metal bobbin (24), and it is arranged as the neighboring part (24) of surrounding elementary and secondary coil (21,22),
Metal bobbin (24) has slit (241) at it on axially, thus limit elastically deformable neighboring part (24) and
Metal bobbin (24) changes its external diameter by being coupled to consent (71), thereby cylindrical part (2) is fixed to consent (71).
7. an ignition coil (1), it comprises:
Cylindrical part (2), it comprises primary coil (21) and secondary coil (22), described secondary coil is twined coaxially with respect to described primary coil (21),
Wherein cylindrical part (2) can insert in the consent (71) of engine case (7) of internal combustion engine,
Cylindrical part (2) has base portion (202) and terminal (201) respectively on it is axial,
The base portion (202) of cylindrical part (2) has the embedded head link actuator (3) for primary coil (21) supply electric energy,
Cylindrical part (2) has tapered portion (34,134,234,5) on its neighboring,
Tapered portion (34,134,234,5) has the shape that its thickness reduces towards the end (201) of cylindrical part (2),
The tapered portion of cylindrical part (2) (34,134,234,5) can be coupled to the edge of opening (711) of consent (71), thereby cylindrical part (2) is fixed to consent (71),
Described tapered portion (34,134,234) comprises a plurality of tapering parts (342,442), and described a plurality of tapering parts (342,442) are outwards outstanding towards the end (201) of cylindrical part (2).
8. according to the ignition coil (1) of claim 7, it is characterized in that the embedded head link actuator (3) of the base portion (202) of cylindrical part (2) has the loop section (341 of annular, 234), it defines tapered portion (34,134,234) on the neighboring of cylindrical part (2).
9. according to the ignition coil (1) of claim 7, it is characterized in that,
In described a plurality of tapering part (342,442) each all be formed with on the perimeter sides within it step (344) and
Be formed with gap (345) between the outer periphery surface of each in described a plurality of tapering part (342,442) and cylindrical part (2).
10. according to the ignition coil (1) of claim 9, it is characterized in that embedded head link actuator (3) has the igniter (32) that has the supply of electric power control circuit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP369996/2004 | 2004-12-21 | ||
| JP2004369996 | 2004-12-21 | ||
| JP256652/2005 | 2005-09-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1794384A CN1794384A (en) | 2006-06-28 |
| CN100495601C true CN100495601C (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100229702A Active CN100495601C (en) | 2004-12-21 | 2005-12-21 | Ignition coil |
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| Country | Link |
|---|---|
| CN (1) | CN100495601C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6468143B2 (en) * | 2015-09-16 | 2019-02-13 | 株式会社デンソー | Ignition coil for internal combustion engines |
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- 2005-12-21 CN CNB2005100229702A patent/CN100495601C/en active Active
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| Publication number | Publication date |
|---|---|
| CN1794384A (en) | 2006-06-28 |
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