CN102741951A - Ignition coil - Google Patents
Ignition coil Download PDFInfo
- Publication number
- CN102741951A CN102741951A CN2011800090322A CN201180009032A CN102741951A CN 102741951 A CN102741951 A CN 102741951A CN 2011800090322 A CN2011800090322 A CN 2011800090322A CN 201180009032 A CN201180009032 A CN 201180009032A CN 102741951 A CN102741951 A CN 102741951A
- Authority
- CN
- China
- Prior art keywords
- contact
- high voltage
- ignition coil
- housing
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/12—Ignition, e.g. for IC engines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Ignition coils are known having a housing provided with a coil body having a high voltage discharge which is contacted to a high voltage contact, wherein the housing is filled with a casting compound. The electrical contact between the high voltage discharge and the high voltage contact is achieved by a contact spring which presses on the high voltage contact with a spring force. The contact spring is embedded in the casting compound, as is the coil body. Disadvantageous is that the high voltage contact is mechanically coupled to the housing of the ignition coil and the contact spring is mechanically coupled to the casting compound, because the housing has a different thermal expansion coefficient than the casting compound. As a result, contact interruptions between the high voltage discharge of the coil body and the high voltage contact leading to the ignition plug can occur if the high voltage contact together with the housing moves away from the contact spring located in the casting compound as a result of thermal expansion. Said contact interruptions lead to so-called pre-sparking stretches during ignition coil operation, by which the material on the high voltage contact is eroded away, electromagnetic interferences occur and the spark energy is reduced. The invention relates to an ignition coil wherein contact interruptions are prevented. According to the invention, the high voltage contact (15) is designed so that a form-fit occurs with the casting compound (7).
Description
Technical field
The present invention relates to a kind of ignition coil according to the said type of independent claims.
Background technology
By the known a kind of ignition coil that has housing of JP 2009027064 A, in said housing, be provided with coil case, said coil case has high-voltage output end, and said high-voltage output end contacts with high-voltage contact, and wherein said housing utilizes mould material to fill.Electrically contacting through contact spring between high-voltage output end and high-voltage contact realizes that said contact spring is pressed onto on the high-voltage contact with elastic force.Contact spring is arranged in the mould material as coil case.Shortcoming is, because housing has the thermal coefficient of expansion that is different from mould material, so the housing of high-voltage contact and ignition coil mechanically is coupled, and said contact spring and mould material mechanically are coupled.Thus, when high-voltage contact with housing because thermal expansion and when the contact spring that is arranged in mould material is removed, contact disconnection between the high-voltage output end that may appear at said coil case and the high-voltage contact that leads to spark plug.Said contact is broken off and when ignition coil is worked, is caused so-called serial connection gap (Vorfunkenstrecken), because said serial connection gap erodes the material on high-voltage contact, and forms electromagnetic interference and reduces spark energy.
Summary of the invention
Relative therewith; Be according to advantage of the present invention, that have the ignition coil of independent power requirement characteristic; Prevent the disconnection that contacts between the high-voltage output end of coil case and the high-voltage contact that leads to spark plug; And therefore realize contact reliably through following manner: said high-voltage contact is so constructed, and makes to form to be connected with the form fit of mould material.In this way, high-voltage contact and contact spring utilize mould material to promote with the mode of heat together.Relative motion no longer appears between contact spring and the high-voltage contact thus.
Can be implemented in the favourable improvement project and the prioritization scheme of the ignition coil that provides in the independent power requirement through described measure in the dependent claims.
Following situation is particularly advantageous: form fit connects and to realize through at least one undercut portions on high-voltage contact, connects because can obtain enough good form fit in this way, and this form fit connects and can not form contact and break off.According to a kind of favourable execution mode, the undercut portions of high-voltage contact is groove, otch, protuberance, convex shoulder or protruding.
Following in addition situation is favourable: high-voltage contact has the surface of being polished, and also is reinforced by this way because form fit connects.The polishing on surface for example can realize through sandblast, etching or plasma treatment (Plasmieren).
Following situation is very favorable: high-voltage output end comprises the contact element that is electrically connected with high-voltage contact.Contact element is electrically connected with the secondary coil of coil case, and this contact element for example can be designed to contact spring.
Following in addition situation is favourable: high-voltage contact is the part of Connection Element; This Connection Element can be electrically connected with spark plug through helical spring; Said Connection Element is arranged in the output channel of housing; And seal said output channel, because prevented that by this way mould material from passing output channel and overflowing from housing.
Description of drawings
Embodiments of the invention illustrate simplifiedly in the accompanying drawings and in description subsequently, set forth in detail.
Embodiment
Accompanying drawing shows according to ignition coil of the present invention with sectional view.
Said ignition coil has primary coil body 2 that has primary coil 1 and the secondary wire circle body 4 that holds secondary coil 3.Said two coil cases 2,4 are around the part of iron core 5, and said iron core is formed by one group of range upon range of sheet metal, for example silicon steel sheet.Coil case 2,4 and iron core with its coil 1,3 are arranged in the housing 6, and mould material 7, the for example casting resin of said housing utilization sclerosis are filled.
Primary coil 1 is connected with power supply 9 through connecting lead 8.In secondary coil 3, induce high voltage by primary coil 1, said high voltage is directed to spark plug 10 places through electrical connection section.
Secondary wire circle body 4 has high-voltage output end 13, and said high-voltage output end contacts with high-voltage contact 15 through contact element 14, for example contact spring.Contact spring 14 affacts on the high-voltage contact 15 with elastic force before filling with mould material 7, and for example is designed to the spring foil metal of bar shaped.High-voltage output end 13 is electrically connected with the secondary coil 3 of secondary wire circle body 4.High-voltage contact 15 continues conduct high voltage towards spark plug 10, and said high-voltage contact is for example processed by aluminium, zine pressure casting, brass or other electric conducting material.
In order to prevent that according to setting of the present invention, high-voltage contact 15 is so constructed, and makes to form to be connected with the form fit of mould material 7 in the disconnection that contacts between the high-voltage output end 13 of secondary wire circle body 4 and the high-voltage contact 15.Be connected with the form fit of mould material 7 through high-voltage contact 15 and guaranteed: high-voltage contact 15, and does not move relative to each other because thermal expansion together is pushed with the contact spring 14 that is surrounded by mould material 7.According to this embodiment, said form fit connection realizes through at least one undercut portions 16 on high-voltage contact 13.The undercut portions 16 of high-voltage contact 15 can be groove, otch, protuberance, convex shoulder or protruding.According to this embodiment, undercut portions 16 is protruding, and this convexity is radially outstanding about the longitudinal extension of high-voltage contact 15 with respect to all the other high-voltage contacts 15.Said form fit connects and can also additionally strengthen through following manner: the surface of the high-voltage contact 15 surperficial in other words peak valley height of average roughness depth for Rz (10 height of nao-and micro relief) at least=4 microns of being polished.This can realize through sandblast, etching or plasma resonance.
High-voltage contact 13 for example is connected with Connection Element 20, and said Connection Element is arranged in the output channel 17 of housing 6, and said Connection Element so is sealed shut output channel, makes at first liquid mould material 7 can not overflow through output channel 17.If output channel 17 is because the thermal expansion of housing 6 is stretched downwards, the Connection Element 20 with high-voltage contact 15 is connected through the form fit with mould material 7 and prevents that it from following and move.Connection Element 20 for example is configured to sleeve shaped, so that arrange electronic component, for example diode or the resistance that is used to suppress spark therein.If do not need this electronic component, then Connection Element 20 just is configured to cylindricality or bolt shape.In order to touch spark plug 10, helical spring 21 can be connected on the Connection Element 20.
Claims (10)
1. the ignition coil that has housing (6); In said housing, be provided with coil case (4); Said coil case has the high-voltage output end (13) that contacts with high-voltage contact (15), and wherein said housing (6) utilizes mould material (7) to fill, and it is characterized in that; Said high-voltage contact (15) is structure so, makes to form to be connected with the form fit of said mould material (7).
2. press claim 1 described ignition coil, it is characterized in that, said form fit connection realizes through the undercut portions (16) on said high-voltage contact (15).
3. by each described ignition coil in the above-mentioned claim, it is characterized in that the undercut portions (16) of said high-voltage contact (15) is groove, otch, protuberance, convex shoulder or protruding.
4. by each described ignition coil in the above-mentioned claim, it is characterized in that said high-voltage contact (15) has the surface of being polished.
5. by each described ignition coil in the above-mentioned claim, it is characterized in that said high-voltage contact (15) is by sandblast, etching or plasma treatment.
6. by each described ignition coil in the above-mentioned claim, it is characterized in that said high-voltage output end (13) comprises contact element (14), said contact element is electrically connected with said high-voltage contact (15).
7. by each described ignition coil in the above-mentioned claim, it is characterized in that said contact element (14) is contact spring or contact chip.
8. by each described ignition coil in the above-mentioned claim, it is characterized in that said high-voltage output end (13) is electrically connected with the secondary coil (3) of said coil case (4).
9. by each described ignition coil in the above-mentioned claim, it is characterized in that said high-voltage contact (15) is the part of Connection Element (20), said Connection Element can pass through helical spring (21) and be electrically connected with spark plug (10).
10. by each described ignition coil in the above-mentioned claim, it is characterized in that said Connection Element (20) is arranged in the output channel (17) of said housing (6), and seals said output channel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010001814A DE102010001814A1 (en) | 2010-02-11 | 2010-02-11 | ignition coil |
| DE102010001814.7 | 2010-02-11 | ||
| PCT/EP2011/050729 WO2011098329A1 (en) | 2010-02-11 | 2011-01-20 | Ignition coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102741951A true CN102741951A (en) | 2012-10-17 |
| CN102741951B CN102741951B (en) | 2016-05-18 |
Family
ID=43920764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180009032.2A Active CN102741951B (en) | 2010-02-11 | 2011-01-20 | Ignition coil |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN102741951B (en) |
| BR (1) | BR112012020090B1 (en) |
| DE (1) | DE102010001814A1 (en) |
| WO (1) | WO2011098329A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107644732A (en) * | 2016-07-21 | 2018-01-30 | 博格华纳路德维希堡有限公司 | Ignition coil |
| CN107644733A (en) * | 2016-07-21 | 2018-01-30 | 博格华纳路德维希堡有限公司 | The method of ignition coil and manufacture ignition coil |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9796165B2 (en) | 2013-12-18 | 2017-10-24 | Delphi Technologies, Inc. | Ignition coil and method of assembly |
| DE102014210142A1 (en) * | 2014-05-27 | 2015-12-03 | Volkswagen Aktiengesellschaft | Ignition coil with a Duroplastkunststoff coil housing and / or an injected in a thermoset plastic ignition electronics |
| DE102014010585A1 (en) * | 2014-07-17 | 2016-01-21 | Diehl Metall Stiftung & Co. Kg | Brass component and use of the component |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0445557A1 (en) * | 1990-03-08 | 1991-09-11 | Nippondenso Co., Ltd. | Ignition coil for internal combustion engine |
| US5550704A (en) * | 1994-02-25 | 1996-08-27 | Mitsubishi Denki Kabushiki Kaisha | Ignition coil including inorganic insulator exhibiting higher conductivity along its surface than perpendicular to its surface |
| DE19523900C1 (en) * | 1995-06-30 | 1997-01-16 | Bosch Gmbh Robert | Process for the pretreatment of a plastic surface to be glued |
| JP2009027064A (en) * | 2007-07-23 | 2009-02-05 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
| CN101490771A (en) * | 2006-05-30 | 2009-07-22 | 罗伯特.博世有限公司 | Ignition coil |
| CN101517662A (en) * | 2006-09-26 | 2009-08-26 | 罗伯特·博世有限公司 | Ignition coil, in particular for an internal combustion engine of a motor vehicle |
-
2010
- 2010-02-11 DE DE102010001814A patent/DE102010001814A1/en active Pending
-
2011
- 2011-01-20 CN CN201180009032.2A patent/CN102741951B/en active Active
- 2011-01-20 WO PCT/EP2011/050729 patent/WO2011098329A1/en active Application Filing
- 2011-01-20 BR BR112012020090A patent/BR112012020090B1/en active IP Right Grant
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0445557A1 (en) * | 1990-03-08 | 1991-09-11 | Nippondenso Co., Ltd. | Ignition coil for internal combustion engine |
| US5550704A (en) * | 1994-02-25 | 1996-08-27 | Mitsubishi Denki Kabushiki Kaisha | Ignition coil including inorganic insulator exhibiting higher conductivity along its surface than perpendicular to its surface |
| DE19523900C1 (en) * | 1995-06-30 | 1997-01-16 | Bosch Gmbh Robert | Process for the pretreatment of a plastic surface to be glued |
| CN101490771A (en) * | 2006-05-30 | 2009-07-22 | 罗伯特.博世有限公司 | Ignition coil |
| CN101517662A (en) * | 2006-09-26 | 2009-08-26 | 罗伯特·博世有限公司 | Ignition coil, in particular for an internal combustion engine of a motor vehicle |
| JP2009027064A (en) * | 2007-07-23 | 2009-02-05 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107644732A (en) * | 2016-07-21 | 2018-01-30 | 博格华纳路德维希堡有限公司 | Ignition coil |
| CN107644733A (en) * | 2016-07-21 | 2018-01-30 | 博格华纳路德维希堡有限公司 | The method of ignition coil and manufacture ignition coil |
| CN107644733B (en) * | 2016-07-21 | 2022-03-22 | 博格华纳路德维希堡有限公司 | Ignition coil and method for manufacturing ignition coil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102741951B (en) | 2016-05-18 |
| WO2011098329A1 (en) | 2011-08-18 |
| DE102010001814A1 (en) | 2011-08-11 |
| BR112012020090B1 (en) | 2020-02-04 |
| BR112012020090A2 (en) | 2016-05-17 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |