WO2016181518A1 - 点火コイル - Google Patents
点火コイル Download PDFInfo
- Publication number
- WO2016181518A1 WO2016181518A1 PCT/JP2015/063722 JP2015063722W WO2016181518A1 WO 2016181518 A1 WO2016181518 A1 WO 2016181518A1 JP 2015063722 W JP2015063722 W JP 2015063722W WO 2016181518 A1 WO2016181518 A1 WO 2016181518A1
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- WO
- WIPO (PCT)
- Prior art keywords
- side core
- magnet
- core
- coil
- gap
- Prior art date
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- 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
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
-
- 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
- H01F2038/127—Ignition, e.g. for IC engines with magnetic circuit including permanent magnet
Definitions
- the present invention relates to an ignition coil, and more particularly to an ignition coil that supplies a high voltage to an ignition plug of an internal combustion engine.
- a magnetic circuit having a closed magnetic circuit configuration used in a conventional ignition coil for an internal combustion engine includes a center core disposed inside the primary coil and the secondary coil, one end surface abutting against one end surface of the center core, and the other The end surface is composed of a side core that abuts against the other end surface of the center core via a magnet.
- Patent Document 1 a plate-like shape having a larger area than the cross-sectional area of the core is formed on the side core positioned outside the primary coil and the secondary coil.
- Patent Document 1 a configuration in which a magnet is inclined with respect to a magnetic path and bonded to a core, and is arranged at a position where the magnets intersect on a vertical line that is equidistant from the central portion of the primary coil or the secondary coil.
- the position of the air gap is the position farthest from the primary coil and the secondary coil. Therefore, there is an advantage that the reduction in coupling due to the influence of magnetic flux leaking from the air gap can be reduced. is there.
- the internal combustion engine ignition coil since the internal combustion engine ignition coil has no protrusions or the like positioned around the gap corresponding to the magnet insertion portion, it is affected by the magnetic force generated by the magnetic flux generated when the magnetic circuit is assembled or when the primary coil is energized. There is also a problem that misalignment occurs and productivity and performance deteriorate. In order to solve this problem, there is a method of fixing the magnet and the core with an adhesive. However, a facility for applying the adhesive is required, which increases the cost of the production line.
- the present invention provides an ignition coil that can suppress an increase in magnetic circuit resistance, prevent a positional shift during energization / non-energization of the primary coil, and suppress a decrease in performance and productivity. It is for the purpose of provision.
- the ignition coil according to the present invention includes a center core disposed inside the primary coil and the secondary coil, a first side core disposed outside the primary coil and the secondary coil, and in contact with the center core; A second side core; and a magnet disposed between the first side core and the second side core; and forming a magnetic path via the center core, the first side core and the second side core, and the magnet.
- the first side core and the second side core form a space portion at a contact portion between the first side core and the second side core, and the shape of the space portion is an insertion portion of the magnet disposed obliquely with respect to the magnetic path, and It is a shape which forms the space
- the ignition coil according to the present invention since the magnetic path length of the gap can be minimized, the magnetic resistance is reduced and the magnetic characteristics are improved.
- the gap surface has the role of holding the magnet, the magnet can be positioned at the time of assembly, and in addition, the displacement of the magnet due to the magnetic force when the primary coil is energized can be suppressed, and the coil performance can be reduced. It becomes possible to prevent.
- FIG. 4 is a partially enlarged view of FIG. 3. It is sectional drawing which shows the magnetic circuit of the ignition coil which concerns on Embodiment 1 of this invention. It is the elements on larger scale of FIG.
- FIG. 6 is a distribution diagram of magnetic flux in the magnetic circuit shown in FIG. 5.
- FIG. 4 is a distribution diagram of magnetic flux in the magnetic circuit shown in FIG. 3.
- FIG. 1 is a sectional view showing an internal combustion engine ignition coil according to Embodiment 1 of the present invention
- FIG. 2 is a top view showing a side core of FIG.
- a primary coil 2 is disposed outside a substantially I-shaped center core 1 formed by stacking electromagnetic steel plates. Is provided.
- a secondary coil 3 is provided outside the primary coil 2.
- One end surface of the L-shaped first side core 4 is in contact with one end surface of the center core 1.
- One end surface of the magnet 5 is in contact with the other end surface of the first side core 4.
- the magnet 5 is magnetized in a direction opposite to the direction of magnetic flux generated by energization of the primary coil 2.
- One end surface of the L-shaped second side core 6 is in contact with the other end surface of the magnet 5.
- the other end surface of the second side core 6 is in contact with the center core 1, and the center core 1, the first side core 4, the magnet 5, and the second side core 6 form a closed magnetic circuit configuration.
- the internal combustion engine ignition coil configured as described above is housed in the case 7.
- a closed magnetic path that passes through the center core 1, the first side core 4, the magnet 5, and the second side core 6 is configured.
- a magnet other than the magnet 5 or a center may be provided in the closed magnetic path. It is good also as a structure via a closed magnetic circuit which added magnetic bodies other than the core 1, the 1st side core 4, and the 2nd side core 6.
- the first side core 4 and the second side core 6 have an L shape formed by laminating electromagnetic steel plates.
- the first side core 4 is longer in the longitudinal direction on the inner peripheral side than the outer peripheral side
- the second side core 6 is on the outer peripheral side on the inner peripheral side. Is also longer in the longitudinal direction.
- the magnet insertion portion 8 has a dimension larger than the width of the magnet 5.
- an angle of 90 + ⁇ ° is formed at the outer peripheral end portion 10a of the first side core 4, and an angle of 90 + ⁇ ° is also formed at the inner peripheral end portion 9b of the second side core 6. .
- the center core 1 disposed inside the primary coil 2 and the secondary coil 3 and the outside of the primary coil 2 and the secondary coil 3 are disposed.
- the first side core 4 and the second side core 6 that are two side cores that contact the center core 1 and the magnet 5 disposed between the first side core 4 and the second side core 6 form a magnetic circuit.
- the shape of the space formed between the side core 4 and the second side core 6 is such that the magnet insertion portion 8 disposed obliquely with respect to the magnetic path and the gap perpendicular to the magnetic path at both ends of the magnet 5 11a and 11b are formed.
- FIG. 3 and FIG. 4 which is a partially enlarged view of the conventional ignition coil for an internal combustion engine
- the direction of the gap formed at both ends of the magnet 5 is oblique with respect to the magnetic path length.
- the magnetic path length lg 1 becomes larger than the thickness t of the magnet 5 and the magnetic resistance increases.
- the gap direction is parallel to the magnetic path length as shown in FIG.
- the magnetic path length lg 2 becomes the same as the thickness t of the magnet 5, the magnetic resistance is lowered, and the magnetic characteristics are improved.
- the magnet 5 is attracted to the first side core 4 and the second side core 6 by magnetic force during assembly, but the corners of the outer peripheral side end portion 10 a of the first side core 4 and the inner peripheral side end portion 9 b of the second side core 6.
- the magnet 5 tries to move by the magnetic force, but the outer end 10a of the first side core 4
- the movement of the second side core 6 is minimized by the corner of the inner peripheral side end portion 9b, and the performance degradation can be suppressed.
- the gap 11 a is configured to be located on an axis line of ⁇ 10% from the central axis 12 of the winding length of the primary coil 2.
- the air gap 11a is close to the contact surface between the center core 1 and the second side core 6, so that the magnetic flux distribution leaks from the first side core 4 as shown in FIG.
- the magnetic flux ⁇ reaches the center core 1 avoiding the second side core 6.
- the number of windings of the secondary coil 3 with which the magnetic flux ⁇ is linked decreases, and the coupling characteristics of the primary coil 2 and the secondary coil 3 are deteriorated.
- the internal combustion engine ignition coil according to Embodiment 1 has a configuration in which the position of the air gap 11a is far from the contact surfaces of the center core 1, the first side core 4, and the second side core 6 in terms of the magnetic path length. Therefore, as shown in FIG.
- the magnetic flux ⁇ has a distribution that reaches the second side core 6 from the first side core 4 and increases the number of flux linkages with the secondary coil 3 to improve the coupling characteristics. It becomes possible.
- FIG. 9 the magnetic flux density which penetrates the secondary coil 3 in the position of the space
- the gap 11a when the gap 11a, the distance g 1 and 11b smaller than the thickness t of the magnet 5, since it is possible to reduce the magnetic resistance, it is possible to realize a high output ignition coil with a low breaking current.
- FIG. 11 is a diagram illustrating the energy characteristics of the ignition coil for an internal combustion engine according to the second embodiment, the gap 11a, the 11b, to change the size of the gap g 1 and the width g 2 of the gap shown in FIG. 6 , Shows the energy characteristics for it.
- the size of the gap is adjusted to reduce the magnetic resistance so that a high output can be obtained with respect to a low breaking current.
- the ignition coil for an internal combustion engine is designed such that the primary current flowing through the primary coil 2 is 6A and the number of turns of the primary coil 2 is 114T.
- the output energy is integrated and calculated from the ampere turn applied to the primary side and the magnetic flux passing through the center core 1. The calculation is performed using magnetic field analysis.
- FIG. 10 shows the energy characteristics in the ratio to the thickness t of the magnet 5 when the gap g 1 is changed from 0 when the width g 2 of the gaps 11a and 11b is fixed to the same dimension as the thickness t of the magnet 5. ing.
- the energy when the gap width is 0 is 1, the energy is highest when the gap g 1 is 0.45 to 0.55 times the thickness t of the magnet 5.
- the gaps 11a and 11b are spaced 0.45 to 0.55 times the thickness t of the magnet 5 and the gaps 11a and 11b have a width of 10 ° ⁇ When the dimension is such that ⁇ ⁇ 13 °, a high output coil with a low breaking current can be realized.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
前記第1サイドコア及び前記第2サイドコアは両者の当接部で空間部を形成し、前記空間部の形状は、前記磁路に対して斜めに配置される前記マグネットの挿入部と、前記マグネットの両端部にて前記磁路に対して垂直な空隙を形成する形状であること特徴とするものである。
この発明の前記以外の目的、特徴、観点および効果は、図面を参照する以下のこの発明の詳細な説明から、さらに明らかになるであろう。
図1は、この発明の実施の形態1に係る内燃機関用点火コイルを示す断面図であり、図2は、図1のサイドコアを示す上面図である。
次に、この発明の実施の形態2に係る内燃機関用点火コイルについて説明する。
図10、図11は、実施の形態2に係る内燃機関用点火コイルのエネルギー特性を表わす図で、空隙11a、11bについて、図6に示す空隙の間隔g1および幅g2の寸法を変化させ、それに対するエネルギー特性を示している。ここでは、低遮断電流に対して高出力が得られるように、空隙部の寸法を調整し、磁気抵抗を下げている。
Claims (4)
- 1次コイル及び2次コイルの内側に配置されたセンターコアと、前記1次コイル及び前記2次コイルの外側に配置され、前記センターコアに当接する第1サイドコア及び第2サイドコアと、前記第1サイドコア及び前記第2サイドコア間に配置されるマグネットと、
を備え、前記センターコアと、前記第1サイドコア及び前記第2サイドコアと、前記マグネットを経由する磁路を形成する点火コイルにおいて、
前記第1サイドコア及び前記第2サイドコアは両者の当接部で空間部を形成し、前記空間部の形状は、前記磁路に対して斜めに配置される前記マグネットの挿入部と、前記マグネットの両端部にて前記磁路に対して垂直な空隙を形成する形状であることを特徴とする点火コイル。 - 前記空隙の内周側の空隙が、前記1次コイルの巻線長の中心軸から±10%の軸線上にあることを特徴とする請求項1に記載の点火コイル。
- 前記空隙の間隔が、前記マグネットの厚み以下であることを特徴とする請求項1または2に記載の点火コイル。
- 前記空隙の間隔が、前記マグネット厚みの0.45~0.55倍であり、且つ前記空隙の幅が磁路に対する角度θ=10°~13°になる寸法であることを特徴とする請求項1または2に記載の点火コイル。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017517534A JP6433584B2 (ja) | 2015-05-13 | 2015-05-13 | 点火コイル |
DE112015006525.3T DE112015006525T5 (de) | 2015-05-13 | 2015-05-13 | Zündspule |
CN201580079944.5A CN107533903B (zh) | 2015-05-13 | 2015-05-13 | 点火线圈 |
US15/549,189 US10319516B2 (en) | 2015-05-13 | 2015-05-13 | Ignition coil |
PCT/JP2015/063722 WO2016181518A1 (ja) | 2015-05-13 | 2015-05-13 | 点火コイル |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2015/063722 WO2016181518A1 (ja) | 2015-05-13 | 2015-05-13 | 点火コイル |
Publications (1)
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WO2016181518A1 true WO2016181518A1 (ja) | 2016-11-17 |
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PCT/JP2015/063722 WO2016181518A1 (ja) | 2015-05-13 | 2015-05-13 | 点火コイル |
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US (1) | US10319516B2 (ja) |
JP (1) | JP6433584B2 (ja) |
CN (1) | CN107533903B (ja) |
DE (1) | DE112015006525T5 (ja) |
WO (1) | WO2016181518A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018179241A1 (ja) * | 2017-03-30 | 2018-10-04 | 三菱電機株式会社 | 点火コイル |
Families Citing this family (1)
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WO2019202674A1 (ja) * | 2018-04-18 | 2019-10-24 | 三菱電機株式会社 | 内燃機関用点火コイル |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008277461A (ja) * | 2007-04-27 | 2008-11-13 | Denso Corp | 点火コイル |
JP2009076734A (ja) * | 2007-09-21 | 2009-04-09 | Hanshin Electric Co Ltd | 内燃機関用点火コイル |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4480377A (en) * | 1982-09-27 | 1984-11-06 | General Motors Corporation | Method of making an ignition coil core |
ES2040409T3 (es) * | 1988-07-28 | 1993-10-16 | Nippondenso Co., Ltd. | Bobina de ignicion. |
JPH10275732A (ja) | 1997-03-31 | 1998-10-13 | Hanshin Electric Co Ltd | 内燃機関用点火コイル |
JP4291422B2 (ja) | 1997-04-18 | 2009-07-08 | 阪神エレクトリック株式会社 | 内燃機関用点火コイル |
KR100418005B1 (ko) * | 1997-05-23 | 2004-02-14 | 가부시끼가이샤 히다찌 카 엔지니어링 | 엔진의 점화 장치 |
JP3284925B2 (ja) * | 1997-06-03 | 2002-05-27 | 株式会社デンソー | 点火装置 |
JP2004247571A (ja) * | 2003-02-14 | 2004-09-02 | Diamond Electric Mfg Co Ltd | 内燃機関用点火装置 |
DE10308077B4 (de) * | 2003-02-26 | 2005-10-13 | Robert Bosch Gmbh | Vorrichtung zur Energiespeicherung und Energietransformierung |
JP3922251B2 (ja) * | 2003-12-17 | 2007-05-30 | 三菱電機株式会社 | 点火コイル |
JP4209403B2 (ja) * | 2005-04-12 | 2009-01-14 | 三菱電機株式会社 | 内燃機関用点火装置 |
JP2007103482A (ja) | 2005-09-30 | 2007-04-19 | Diamond Electric Mfg Co Ltd | 内燃機関用点火コイル |
DE102006044435A1 (de) * | 2006-09-21 | 2008-03-27 | Robert Bosch Gmbh | Vorrichtung zur Energiespeicherung und Energietransformierung |
US7849843B2 (en) * | 2007-04-27 | 2010-12-14 | Denso Corporation | Ignition coil |
US7777604B2 (en) * | 2007-04-27 | 2010-08-17 | Toyo Denso Kabushiki Kaisha | Ignition coil |
US7796004B2 (en) * | 2007-04-27 | 2010-09-14 | Toyo Denso Kabushiki Kaisha | Ignition coil |
US8854169B2 (en) * | 2012-09-14 | 2014-10-07 | Tempel Steel Company | Automotive ignition coil having a core with at least one embedded permanent magnet |
DE112015006452T5 (de) * | 2015-04-15 | 2017-12-28 | Mitsubishi Electric Corporation | Zündspule für einen Verbrennungsmotor |
-
2015
- 2015-05-13 CN CN201580079944.5A patent/CN107533903B/zh active Active
- 2015-05-13 WO PCT/JP2015/063722 patent/WO2016181518A1/ja active Application Filing
- 2015-05-13 US US15/549,189 patent/US10319516B2/en active Active
- 2015-05-13 DE DE112015006525.3T patent/DE112015006525T5/de active Pending
- 2015-05-13 JP JP2017517534A patent/JP6433584B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008277461A (ja) * | 2007-04-27 | 2008-11-13 | Denso Corp | 点火コイル |
JP2009076734A (ja) * | 2007-09-21 | 2009-04-09 | Hanshin Electric Co Ltd | 内燃機関用点火コイル |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018179241A1 (ja) * | 2017-03-30 | 2018-10-04 | 三菱電機株式会社 | 点火コイル |
CN110462768A (zh) * | 2017-03-30 | 2019-11-15 | 三菱电机株式会社 | 点火线圈 |
CN110462768B (zh) * | 2017-03-30 | 2022-03-15 | 三菱电机株式会社 | 点火线圈 |
US11289267B2 (en) | 2017-03-30 | 2022-03-29 | Mitsubishi Electric Corporation | Ignition coil including a center iron core and side iron cores |
Also Published As
Publication number | Publication date |
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DE112015006525T5 (de) | 2018-02-15 |
US20180096786A1 (en) | 2018-04-05 |
JP6433584B2 (ja) | 2018-12-05 |
CN107533903B (zh) | 2019-11-22 |
CN107533903A (zh) | 2018-01-02 |
JPWO2016181518A1 (ja) | 2017-10-05 |
US10319516B2 (en) | 2019-06-11 |
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