JP7737136B2 - Electrical noise eliminator for igniters - Google Patents
Electrical noise eliminator for ignitersInfo
- Publication number
- JP7737136B2 JP7737136B2 JP2021173268A JP2021173268A JP7737136B2 JP 7737136 B2 JP7737136 B2 JP 7737136B2 JP 2021173268 A JP2021173268 A JP 2021173268A JP 2021173268 A JP2021173268 A JP 2021173268A JP 7737136 B2 JP7737136 B2 JP 7737136B2
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- igniter
- electromagnetic wave
- sheet
- electrical noise
- absorbing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Ignition Installations For Internal Combustion Engines (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
本発明は、イグナイター用電気ノイズ除去装置に関する。 The present invention relates to an electrical noise eliminator for an igniter .
自動車等のガソリンエンジンの点火装置は、点火プラグと、発火させるため点火コイルと、その上部に位置し点火タイミングを制御する電気回路が設けられているイグナイターにより構成されている。（下記特許文献１及び２参照） The ignition system for gasoline engines in automobiles and other vehicles consists of a spark plug, an ignition coil for ignition, and an igniter located above the spark plug and equipped with an electrical circuit that controls ignition timing. (See Patent Documents 1 and 2 below.)
イグナイターの電気回路が点火コイルの直上にあり、点火コイルは３万ボルトの高電圧を発生させ、その下にある点火プラグから燃料を燃焼させるための火花を発生させているため、点火コイル、点火プラグ両方から高い電磁波が発生し、点火コイルの直上にあるイグナイターの電気回路が障害を受けている。
また、燃料を効率よく燃焼させるには、点火タイミングを正確に点火コイルに電気を送る必要があるが、点火系装置や発電機、車載のエアーコンディショナーなどが発生させている、高周波電流の輻射ノイズや電磁波ノイズにより外部からイグナイターの電気回路が障害を受け、回路に動作不良の原因を起こしている問題がある。
The igniter's electrical circuit is located directly above the ignition coil, and the ignition coil generates a high voltage of 30,000 volts, which creates a spark to burn the fuel in the spark plug below it.As a result, high electromagnetic waves are generated from both the ignition coil and the spark plug, causing damage to the igniter's electrical circuit located directly above the ignition coil.
Furthermore, to burn fuel efficiently, electricity must be sent to the ignition coil at the correct ignition timing. However, there is a problem in that the igniter's electrical circuit can be damaged by external high-frequency current radiation noise and electromagnetic noise generated by ignition devices, generators, and on-board air conditioners, causing the circuit to malfunction.
本発明は、イグナイターの電気回路に障害を及ぼす電磁波ノイズから回路を防護し、ノイズの影響を受けにくいようにすることを課題とする。 The objective of this invention is to protect the igniter's electrical circuit from electromagnetic noise that can cause damage, making the circuit less susceptible to the effects of noise.
上記課題を解決するために、本発明のイグナイター用電気ノイズ除去装置は、ガソリンエンジンの点火装置の一部を構成するイグナイターの電気ノイズを除去するイグナイター用電気ノイズ除去装置であって、
電気回路が収容されたイグナイターケースの外面に、接着剤若しくは両面テープ又は締着具によって、密着されて固定されるシート状の装置本体を備え、
前記装置本体は、電磁波を吸収する電磁波吸収シートによって、少なくとも一部を構成した
ことを特徴とする。
In order to solve the above problems, the present invention provides an igniter electrical noise elimination device that eliminates electrical noise from an igniter that constitutes a part of an ignition device of a gasoline engine, and includes:
The device has a sheet-like device body that is attached to the outer surface of an igniter case that houses an electric circuit by adhesive, double-sided tape, or a fastener;
The device body is characterized in that at least a part thereof is constituted by an electromagnetic wave absorbing sheet that absorbs electromagnetic waves.
前記装置本体は、電磁波を吸収する電磁波吸収シートと、電磁波を反射する電磁波反射シートとを有し、前記電磁波反射シートは、前記電磁波吸収シートよりも前記イグナイターケースから遠い側である外側に位置した状態で、該電磁波吸収シートに重ね合されて積層されたものとしてもよい。 The device main body may have an electromagnetic wave absorbing sheet that absorbs electromagnetic waves and an electromagnetic wave reflecting sheet that reflects electromagnetic waves, and the electromagnetic wave reflecting sheet may be superimposed and laminated on the electromagnetic wave absorbing sheet, positioned on the outside, farther from the igniter case than the electromagnetic wave absorbing sheet .
前記装置本体は、高周波の電磁波を吸収する特性を有する電磁波吸収シートと、低周波の電磁波を吸収する特性を有する電磁波吸収シートとを積層してなるものとしてもよい。 The device body may be formed by laminating an electromagnetic wave absorbing sheet having the property of absorbing high frequency electromagnetic waves and an electromagnetic wave absorbing sheet having the property of absorbing low frequency electromagnetic waves.
低周波の電磁波を吸収する特性を有する電磁波吸収シートを、高周波の電磁波を吸収する特性を有する電磁波吸収シートよりも外側に複数重ねて設けたものとしてもよい。 A plurality of electromagnetic wave absorbing sheets having the property of absorbing low frequency electromagnetic waves may be provided on the outer side of an electromagnetic wave absorbing sheet having the property of absorbing high frequency electromagnetic waves .
前記電磁波吸収シートが複数設けられ、該電磁吸収シートの間に、前記電磁波反射シートを介在させたものとしてもよい。 A plurality of the electromagnetic wave absorbing sheets may be provided, with the electromagnetic wave reflecting sheet interposed between the electromagnetic wave absorbing sheets .
前記電磁波反射シートよりもイグナイターケースに近い側である内側に配置された電磁波吸収シートは、高周波の電磁波を吸収する特性を有するとともに、イグナイターケースから遠い側である外側に配置された電磁波吸収シートは、低周波の電磁波を吸収する特性を有するものとしてもよい。 The electromagnetic wave absorbing sheet arranged on the inside, closer to the igniter case than the electromagnetic wave reflecting sheet, may have the property of absorbing high frequency electromagnetic waves, and the electromagnetic wave absorbing sheet arranged on the outside, farther from the igniter case, may have the property of absorbing low frequency electromagnetic waves .
前記装置本体のイグナイターケースから遠い側の面である外面を、該外面側よりも耐熱性がある材料で構成された耐熱性シートによってカバーしたものとしてもよい。 The outer surface of the device body, which is the surface farthest from the igniter case, may be covered with a heat-resistant sheet made of a material that is more heat-resistant than the outer surface.
前記装置本体は、前記イグナイターケースの外面における前記電気回路の近い側であって且つフラットな部分に固定されるものとしてもよい。 The device main body may be fixed to a flat portion on the outer surface of the igniter case, on the side closer to the electric circuit.
イグナイター用電気ノイズ除去装置をイグナイターの外面に取り付けることにより、燃焼効率が改善されエンジン音、エンジンの振動共に低減がみられた。 By attaching an igniter electrical noise eliminator to the exterior of the igniter, combustion efficiency was improved and both engine noise and vibration were reduced.
また、イグナイター用電気ノイズ除去装置をイグナイターの外面に固定することにより
、燃焼効率が改善されガソリンエンジンのトルクが向上した。
In addition, by fixing an electrical noise eliminator for the igniter to the outer surface of the igniter, combustion efficiency was improved and the torque of the gasoline engine was increased.
この発明の実施形態を、図１及び図２に示す。
点火コイル４の上部にはイグナイター３が一体固定され、イグナイターケース３ａ（樹脂製）の内部上方にはイグナイターの電気回路２が内蔵されている。
イグナイター用電気ノイズ除去装置１はテープ状の形態とし、該イグナイター用電気ノイズ除去装置１は、その下側に１００ＭＨｚから３ＧＨｚの高周波の電磁波を吸収する特性を有する電磁波吸収シートＥを備える。
イグナイター用電気ノイズ除去装置１の上側には数ＭＨｚから１ＧＨｚの低周波の電磁波を吸収する特性を有する電磁波吸収シートＢ、Ｃを２重に重ねたものを備える。
イグナイター用電気ノイズ除去装置１の上側の低周波を吸収する電磁波吸収シートＢ、Ｃと下部の高周波を吸収する電磁波吸収シートＥの中間に銅箔製の電磁波反射シートＤを備える。
イグナイター用電気ノイズ除去装置１の最上部位置（イグナイターケース３ａから遠い側の面である外面）に耐熱樹脂製の耐熱シートＡを備える。
高周波を吸収する電磁波吸収シートＥの下部には、イグナイター３の外面部（上部）に固定しやすいよう粘着シートＦを備える。
尚、前記電磁波吸収シートＢ、Ｃ、Ｅは市販の電磁波吸収シートを使用しても良い。
An embodiment of the present invention is shown in FIGS.
An igniter 3 is fixed integrally to the upper part of the ignition coil 4, and an electric circuit 2 of the igniter is housed in the upper part of the interior of an igniter case 3a (made of resin).
The igniter electrical noise eliminator 1 is in the form of a tape, and the igniter electrical noise eliminator 1 is provided on its underside with an electromagnetic wave absorbing sheet E having the property of absorbing high frequency electromagnetic waves in the range of 100 MHz to 3 GHz.
On the upper side of the igniter electrical noise eliminator 1, two electromagnetic wave absorbing sheets B and C having the property of absorbing low frequency electromagnetic waves in the range of several MHz to 1 GHz are provided.
The igniter electrical noise eliminator 1 has an electromagnetic wave reflective sheet D made of copper foil between upper electromagnetic wave absorbing sheets B and C for absorbing low frequencies and a lower electromagnetic wave absorbing sheet E for absorbing high frequencies.
The igniter electrical noise removal device 1 is provided with a heat-resistant sheet A made of heat-resistant resin at the top position (the outer surface, which is the surface farther from the igniter case 3a).
An adhesive sheet F is provided below the electromagnetic wave absorbing sheet E that absorbs high frequency waves, so that it can be easily fixed to the outer surface (upper part) of the igniter 3.
The electromagnetic wave absorbing sheets B, C, and E may be commercially available electromagnetic wave absorbing sheets.
（シートの使用方法）
イグナイター３の上部に他のエアークリーナーなど補器類がある場合は、補器類を一旦移動させる。
イグナイター３を露出させたら、イグナイター用電気ノイズ除去装置１をイグナイター３の形状と数量に合わせて鋏などで切り分け、イグナイターケース３ａの外面（上部）のフラットな平坦部に粘着シート（両面テープ）で密着させて固定する。 移動させたエアークリーナーなど補器類を元に戻す。
(How to use the sheet)
If there are other accessories such as an air cleaner above the igniter 3, move the accessories temporarily.
Once the igniter 3 is exposed, cut the igniter electrical noise removal device 1 using scissors or similar to fit the shape and number of igniters 3, and secure them to the flat portion of the outer surface (top) of the igniter case 3a using an adhesive sheet (double-sided tape). Return any auxiliary equipment, such as the air cleaner, that you moved earlier to their original positions.
イグナイター用電気ノイズ除去装置１をイグナイターケース３ａの外面に密着固定することにより下記効果（事象）が得られた。
発現する事象には、エンジン音の減少、エンジン音の音質の変化、エンジン本体の振動の減少がみられた。
また、燃焼効率が向上しガソリンエンジンの回転トルクの上昇がみられた。
また、前記電磁波吸収シートＢ，Ｃ，Ｅに重ね合わされ且つ電磁波を反射する電磁波反射シートＤを積層したことにより、点火コイルと点火プラグから発生する電磁波の輻射波はもとより、外部の発電機、エアーコンディショナーなどエンジン周辺の補器類から発生する電磁波がイグナイターの電気回路に悪影響を与えることを極力防止できた。
また、高周波の電磁波を吸収する特性を有する電磁波吸収シートと低周波の電磁波を吸収する特性を有する電磁波吸収シートを積層したことにより、幅広い周波数帯の電磁波を吸収できた。
By closely fixing the igniter electrical noise removal device 1 to the outer surface of the igniter case 3a, the following effects (phenomena) were obtained.
Symptoms observed included a reduction in engine noise, a change in the quality of the engine noise, and a reduction in vibration of the engine itself.
In addition, combustion efficiency improved, resulting in an increase in the rotational torque of the gasoline engine.
Furthermore, by laminating electromagnetic wave reflection sheet D, which is superimposed on the electromagnetic wave absorption sheets B, C, and E and reflects electromagnetic waves, it is possible to minimize the adverse effects on the igniter's electrical circuitry of electromagnetic waves generated not only by the electromagnetic radiation waves generated from the ignition coil and spark plug, but also by electromagnetic waves generated from auxiliary equipment around the engine such as external generators and air conditioners.
Furthermore, by laminating an electromagnetic wave absorbing sheet having the property of absorbing high frequency electromagnetic waves and an electromagnetic wave absorbing sheet having the property of absorbing low frequency electromagnetic waves, it is possible to absorb electromagnetic waves in a wide frequency band.
エンジンを稼働することにより電磁波が発生し、その電磁波により電装系に悪影響を及ぼし、本来持っている性能を発揮することができない。
特に燃焼系統は高い電圧を有しており、高周波電流が発生しやすい環境にあり、スパークプラグの点火タイミングをコントロールしているイグナイター回路はエンジンを制御するコンピューターより弱電で信号を受け取っているため、高周波電流の輻射の影響を受けやすく、適正な伝送タイミングに障害が起きやすい。
また、エンジン本体はもちろんなこと、発電機、エアーコンディショナーなどエンジン周辺の補器類には、電磁波を発生するものも多く搭載されており、自動車自体がノイズの塊のような状態となっている。
イグナイター上部にイグナイター用電気ノイズ除去装置１を取り付けることで、電磁波や高周波電流の輻射の影響を減少させることができ、回路の本来ある性能を発揮させ、正確な点火タイミングで燃焼、エンジン本来の性能を引き出せる。
これにより、エンジントルク、馬力の増大を期待できる。
特に低速トルクが増大し、過度なアクセル操作が必要なくなるので、アクセル操作次第で、燃費を向上させることが可能となる。
特に軽自動車などのエンジン排気量の小さい車両は恩恵が大きい。
（シートの性能実験結果）
Running the engine generates electromagnetic waves that have a negative effect on the electrical system, preventing it from performing at its full potential.
In particular, combustion systems have high voltages and are in an environment where high-frequency currents are likely to be generated. The igniter circuit that controls the ignition timing of the spark plugs receives low-voltage signals from the computer that controls the engine, so it is easily affected by radiation from high-frequency currents and is prone to disruption of proper transmission timing.
In addition, many of the engine's peripheral devices, such as generators and air conditioners, as well as the engine itself, are equipped with components that generate electromagnetic waves, making the car itself a mass of noise.
By attaching the electric noise eliminator 1 for an igniter to the upper part of the igniter, the influence of radiation of electromagnetic waves and high frequency current can be reduced, the original performance of the circuit can be exhibited, combustion can be performed with accurate ignition timing, and the original performance of the engine can be brought out.
This is expected to increase engine torque and horsepower.
In particular, low-speed torque increases, eliminating the need for excessive accelerator operation, making it possible to improve fuel efficiency depending on accelerator operation.
Vehicles with small engine displacement, such as light cars, will benefit greatly.
(Seat performance test results)
ガソリンエンジンにおいて本発明のイグナイター用電気ノイズ除去装置装着前後の排気ガス中の炭化水素（HC）の濃度変化について、図３のグラフに示す。
（性能実験時の環境データ）
使用する車両のメーカー名：三菱自動車販売株式会社
使用車両の車名・仕様：タウンボックス ６６０cc ターボ仕様車
登録年式：２０１９年式
計測機器：ＨＯＲＩＢＡ自動車排ガス測定器 ＭＥＸＡ－３２４Ｌ
計測日：２０２１年４月２５日（日）
計測条件：実験車両を充分暖機（エンジン内水温５５度以上）したアイドリング状態
計測方法：実験車両の排気口に測定器のセンサーを差し込み１分間経過時の値を計測
計測結果：をエンジンにＨＣ（炭化水素）の濃度を装着前と装着後の数値を図３に示す。
上記実験によれば、イグナイター用電気ノイズ除去装置装着前はＨＣ濃度が５０ppmあったが、装着後は計測値が２５ppmまで半減した。半減した理由としては、イグナイター用電気ノイズ除去装置によりイグナイターに悪影響を及ぼす電気ノイズが抑制されイグナイターが本来の性能を発揮しエンジンの燃焼が促進され、排気ガス中の炭化水素（HC）濃度が低下したと考えられる。
ガソリンエンジンへの本発明のイグナイター用電気ノイズ除去装置装着前後の回転トルクの変化について図４のグラフに示す。
（性能実験時の環境データ）
使用する車両のメーカー名：マツダ株式会社
使用車両の車名・仕様：デミオ１５ＭＢ １５００cc
登録年式：２０１６年式
計測機器：ダイナパック自動車エンジンパワー測定器
計測日：２０２１年７月４日（日）
計測条件：実験車両を充分暖機（エンジン内水温５５度以上）し、車軸から直接動力を取るものとする。
計測方法：実験車両のタイヤを外した駆動輪に測定器を接続し測定器による負荷を掛けた状態で限界回転数までエンジンを回し測定器に付随したコンピューターで分析、数値を表示させる。
計測結果：計測した数値のポイントを２０００回転時、３０００回転時、４３００回転時に置き、それぞれの回転域におけるトルクを比較したところ、２０００～３０００回転域と４３００回転域で差異が見られ、特に低回転域のトルクの増大がみられた。
上記実験よれば、イグナイター用電気ノイズ除去装置装着によりエンジンの燃焼が促進されて低回転域のトルクが上がり、低速時のトルク不足を補うことができることが確認できた。
The graph in FIG. 3 shows the change in hydrocarbon (HC) concentration in the exhaust gas before and after the installation of the electrical noise removal device for an igniter of the present invention in a gasoline engine.
(Environmental data from performance testing)
Vehicle manufacturer: Mitsubishi Motors Sales Co., Ltd. Vehicle name and specifications: Town Box 660cc turbo model Registration year: 2019 Measuring equipment: HORIBA automobile exhaust gas measuring instrument MEXA-324L
Measurement date: Sunday, April 25, 2021
Measurement conditions: The test vehicle was fully warmed up (engine water temperature 55°C or higher) and was in an idling state. Measurement method: The sensor of the measuring device was inserted into the exhaust port of the test vehicle and the value was measured after one minute had passed. Measurement results: The HC (hydrocarbon) concentration values before and after installation were shown in Figure 3.
According to the above experiment, the HC concentration was 50 ppm before the igniter electrical noise eliminator was installed, but after installation, the measured value was reduced by half to 25 ppm. The reason for this reduction is thought to be that the igniter electrical noise eliminator suppresses electrical noise that adversely affects the igniter, allowing the igniter to perform at its best and promoting engine combustion, thereby reducing the hydrocarbon (HC) concentration in the exhaust gas.
The graph of FIG. 4 shows the change in rotational torque before and after the installation of the electrical noise removal device for an igniter of the present invention on a gasoline engine.
(Environmental data from performance testing)
Manufacturer of the vehicle used: Mazda Motor Corporation Model and specifications of the vehicle used: Demio 15MB 1500cc
Registration year: 2016 Measuring equipment: Dynapac automobile engine power measuring instrument
Measurement date: Sunday, July 4, 2021
Measurement conditions: The test vehicle is fully warmed up (engine water temperature is 55°C or higher), and power is taken directly from the axle.
Measurement method: A measuring device was connected to the drive wheels of the test vehicle with the tires removed, and the engine was run up to its limiting speed while a load was applied by the measuring device. The computer attached to the measuring device analyzed the data and displayed the numerical values.
Measurement results: The measured values were set at 2000 rpm, 3000 rpm, and 4300 rpm, and the torque at each rotation range was compared. A difference was observed between the 2000-3000 rpm range and the 4300 rpm range, with an increase in torque particularly in the low rotation range.
The above experiment confirmed that the installation of an igniter electrical noise elimination device promotes engine combustion, increases torque in the low rotation range, and makes up for the lack of torque at low speeds.
１ イグナイター用電気ノイズ除去装置
２ 電気回路（イグナイターケースに内蔵）
３ イグナイター
３ａ イグナイターケース
４ 点火コイル
Ａ 耐熱性シート
Ｂ 電磁波吸収シート（低周波対応用）
Ｃ 電磁波吸収シート（低周波対応用）
Ｄ 電磁波反射シート
Ｅ 電磁波吸収シート（高周波対応用）
Ｆ 粘着シート（両面テープ）
1. Electrical noise eliminator for igniters
2 Electrical circuit (built into the igniter case)
3 Igniter 3a Igniter case 4 Ignition coil A Heat-resistant sheet B Electromagnetic wave absorbing sheet (for low frequency)
C Electromagnetic wave absorbing sheet (for low frequencies)
D. Electromagnetic wave reflective sheet E. Electromagnetic wave absorbing sheet (for high frequency)
F Adhesive sheet (double-sided tape)
Claims (6)
電気回路が収容されたイグナイターケースの外面に、接着剤若しくは両面テープ又は締着具によって、密着されて固定されるシート状の装置本体を備え、
前記装置本体は、電磁波を吸収する電磁波吸収シートと、電磁波を反射する電磁波反射シートとを有し、
前記電磁波反射シートは、前記電磁波吸収シートよりも前記イグナイターケースから遠い側である外側に位置した状態で、該電磁波吸収シートに重ね合されて積層された
ことを特徴とするイグナイター用電気ノイズ除去装置。 An igniter electrical noise removal device that removes electrical noise from an igniter that constitutes a part of an ignition device of a gasoline engine,
The device has a sheet-like device body that is attached to the outer surface of an igniter case that houses an electric circuit by adhesive, double-sided tape, or a fastener;
the device body has an electromagnetic wave absorbing sheet that absorbs electromagnetic waves and an electromagnetic wave reflecting sheet that reflects electromagnetic waves,
The electromagnetic wave reflection sheet is positioned on the outer side, farther from the igniter case than the electromagnetic wave absorption sheet, and is laminated on the electromagnetic wave absorption sheet.
1. An electrical noise elimination device for an igniter.
請求項１に記載のイグナイター用電気ノイズ除去装置。 2. The electrical noise removal device for an igniter according to claim 1, wherein the device body is formed by laminating an electromagnetic wave absorbing sheet having a property of absorbing high-frequency electromagnetic waves and an electromagnetic wave absorbing sheet having a property of absorbing low-frequency electromagnetic waves.
請求項２に記載のイグナイター用電気ノイズ除去装置。 3. The electrical noise removal device for an igniter according to claim 2 , wherein a plurality of electromagnetic wave absorbing sheets having the property of absorbing low frequency electromagnetic waves are provided on the outer side of an electromagnetic wave absorbing sheet having the property of absorbing high frequency electromagnetic waves.
前記電磁波反射シートよりもイグナイターケースに近い側である内側に配置された電磁波吸収シートは、高周波の電磁波を吸収する特性を有するとともに、イグナイターケースから遠い側である外側に配置された電磁波吸収シートは、低周波の電磁波を吸収する特性を有する
請求項１に記載のイグナイター用電気ノイズ除去装置。 a plurality of the electromagnetic wave absorbing sheets are provided, and the electromagnetic wave reflecting sheet is interposed between the electromagnetic wave absorbing sheets;
2. The electrical noise removal device for an igniter according to claim 1, wherein an electromagnetic wave absorbing sheet arranged on the inside, closer to the igniter case than the electromagnetic wave reflecting sheet, has the property of absorbing high-frequency electromagnetic waves, and an electromagnetic wave absorbing sheet arranged on the outside, farther from the igniter case , has the property of absorbing low-frequency electromagnetic waves.
請求項１に記載のイグナイター用電気ノイズ除去装置。 2. The electrical noise removal device for an igniter according to claim 1 , wherein an outer surface of the device body that is the surface farther from the igniter case is covered with a heat-resistant sheet made of a material that is more heat-resistant than the outer surface.
請求項１に記載のイグナイター用電気ノイズ除去装置。 2. The electrical noise removing device for an igniter according to claim 1 , wherein the device body is fixed to a flat portion on the outer surface of the igniter case, the flat portion being close to the electrical circuit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000232296A (en) | 1999-02-12 | 2000-08-22 | Hitachi Metals Ltd | Electromagnetic wave absorber |
| JP2017213743A (en) | 2016-05-31 | 2017-12-07 | 凸版印刷株式会社 | Electromagnetic wave-shielding decorative sheet |
| JP2020090912A (en) | 2018-12-04 | 2020-06-11 | ダイヤモンド電機株式会社 | Igniter assembly and igniter unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000232296A (en) | 1999-02-12 | 2000-08-22 | Hitachi Metals Ltd | Electromagnetic wave absorber |
| JP2017213743A (en) | 2016-05-31 | 2017-12-07 | 凸版印刷株式会社 | Electromagnetic wave-shielding decorative sheet |
| JP2020090912A (en) | 2018-12-04 | 2020-06-11 | ダイヤモンド電機株式会社 | Igniter assembly and igniter unit |
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