JP7408453B2 - Ignition system for internal combustion engines - Google Patents
Ignition system for internal combustion engines Download PDFInfo
- Publication number
- JP7408453B2 JP7408453B2 JP2020054024A JP2020054024A JP7408453B2 JP 7408453 B2 JP7408453 B2 JP 7408453B2 JP 2020054024 A JP2020054024 A JP 2020054024A JP 2020054024 A JP2020054024 A JP 2020054024A JP 7408453 B2 JP7408453 B2 JP 7408453B2
- Authority
- JP
- Japan
- Prior art keywords
- primary coil
- control
- ignition
- sub
- abnormal state
- 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.)
- Active
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 54
- 230000002159 abnormal effect Effects 0.000 claims description 124
- 230000004907 flux Effects 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 9
- 230000005856 abnormality Effects 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000009474 immediate action Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Description
本発明は、自動車両に搭載される内燃機関用の点火装置に関し、特に、複数の一次コイルを使用して点火プラグに火花放電を起こす内燃機関用点火装置の改良に関する。 The present invention relates to an ignition device for an internal combustion engine mounted on a motor vehicle, and more particularly to an improvement in an ignition device for an internal combustion engine that uses a plurality of primary coils to cause a spark discharge to a spark plug.
車両搭載の内燃機関として、燃費改善のために直噴エンジンや高ＥＧＲエンジンが採用されているが、これらのエンジンは着火性があまり良くないため、点火装置には高エネルギー型のものが必要になる。そこで、古典的な電流遮断原理により点火コイル一次側から点火コイル二次側に放電エネルギーを与えることに加え、もう一つの一次コイルに通電して二次側へ与えるエネルギーを重畳的に高める重ね放電型点火装置が提案されている。（例えば、特許文献１を参照）。 Direct injection engines and high EGR engines are used as internal combustion engines installed in vehicles to improve fuel efficiency, but these engines do not have very good ignition performance, so a high-energy ignition system is required. Become. Therefore, in addition to applying discharge energy from the primary side of the ignition coil to the secondary side of the ignition coil using the classic current cutoff principle, we conduct a superimposed discharge to increase the energy given to the secondary side in a superimposed manner by energizing another primary coil. type igniters have been proposed. (For example, see Patent Document 1).
特許文献１に記載の点火装置は、点火コイルの一次電流を遮断することで二次側に発生する数ｋＶの高電圧により、点火プラグの放電間隙に絶縁破壊を起こし、点火コイルの二次側に放電電流を流し始めた後に、もう一つの一次コイル（以下、副一次コイルという）に一次電流を流す。副一次コイルへの通電で生じる磁束の向きは、一次コイルの通電遮断で磁束が減少する向きと同じである。このため、通電遮断による一次コイルの磁束変化と、副一次コイルへの通電による発生磁束が、二次コイルに作用することとなる。すなわち、二次コイルには、通常の一次電流遮断による磁束変化よりも大きな磁束変化が作用するので、二次側に発生する磁束を加速させ、二次電流を重畳できる。事実、重ね放電型の点火装置によると、点火プラグに比較的大きな放電エネルギーを得ることができるため、燃料への着火性が向上し、ひいては燃費も向上する。 In the ignition device described in Patent Document 1, a high voltage of several kilovolts is generated on the secondary side by cutting off the primary current of the ignition coil, causing dielectric breakdown in the discharge gap of the ignition plug, and causing damage to the secondary side of the ignition coil. After the discharge current begins to flow through the primary coil, the primary current is passed through the other primary coil (hereinafter referred to as the sub-primary coil). The direction of the magnetic flux generated when the sub-primary coil is energized is the same as the direction in which the magnetic flux decreases when the energization of the primary coil is cut off. Therefore, changes in the magnetic flux of the primary coil due to de-energization and magnetic flux generated due to energization of the sub-primary coil act on the secondary coil. That is, since a larger change in magnetic flux acts on the secondary coil than the change in magnetic flux caused by normal primary current interruption, the magnetic flux generated on the secondary side can be accelerated and the secondary current can be superimposed. In fact, according to the stack discharge type ignition device, a relatively large amount of discharge energy can be obtained in the ignition plug, which improves the ignitability of fuel and, in turn, improves fuel efficiency.
しかしながら、特許文献１に記載された重ね放電型の点火装置は、副一次コイルへの通電量が適切に制御されていないと、本来の点火制御を実現できない。例えば、副一次コイルに必要十分な電流が流れない、或いは副一次コイルに全く電流が流れない場合、二次側に与える放電エネルギーが不足して、燃焼性能が低下し、二酸化炭素などの環境負荷物質の増加や燃費低下が懸念される。また、副一次コイルに必要以上の過電流が流れている場合、燃焼性能は維持できたとしても、副一次コイルへの通電制御を行う駆動素子や巻線の発熱に起因する故障が懸念される。 However, the overlapped discharge type ignition device described in Patent Document 1 cannot realize the original ignition control unless the amount of current applied to the sub-primary coil is appropriately controlled. For example, if sufficient current does not flow through the sub-primary coil, or if no current flows through the sub-primary coil at all, the discharge energy provided to the secondary side will be insufficient, resulting in poor combustion performance and environmental burdens such as carbon dioxide. There are concerns about an increase in substances and a decrease in fuel efficiency. In addition, if an excessive current is flowing through the sub-primary coil more than necessary, even if combustion performance can be maintained, there is a risk of failure due to heat generation in the drive element or winding that controls the energization of the sub-primary coil. .
このように、副一次コイルへの通電制御が適正に行われていないときには、そのまま不適正な重畳制御を継続させないで、速やかに対処できるようにすることが望ましいのであるが、特許文献１に記載の点火装置には、そのような機能が設けられていない。 In this way, when the energization control to the sub-primary coil is not performed properly, it is desirable to be able to take immediate action without continuing the inappropriate superimposition control, as described in Patent Document 1. The ignition system does not have such a function.
そこで、本発明は、副一次コイルを用いて重畳放電を行わせる重畳放電制御が適正な状態でないときは迅速に対処できる内燃機関用点火装置の提供を目的とする。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an ignition device for an internal combustion engine that can quickly take action when superimposed discharge control that performs superimposed discharge using a sub-primary coil is not in an appropriate state.
上記課題を解決するために、内燃機関用点火装置は、点火制御手段からの点火信号のオン・オフによって点火コイルへの通電制御を行うことで、前記点火コイルの二次側に放電エネルギーを与えて点火プラグに火花放電を起こさせる内燃機関用点火装置において、前記点火コイルは、前記点火信号がオンで行われる主一次電流の通電により順方向の磁束量が増加し、前記点火信号がオフになって前記主一次電流が遮断されることにより前記順方向の磁束量が減少する主一次コイルと、該主一次コイルに対する前記主一次電流の遮断タイミング以降の放電期間内に副一次コイル電流を流すことにより、前記順方向と逆の遮断方向に磁束を発生させる副一次コイルと、一端側が前記点火プラグと接続され、前記主一次コイルと前記副一次コイルの磁束変化が作用して前記放電エネルギーが与えられる二次コイルと、を有し、前記点火信号に基づいて、前記主一次コイルへの前記主一次電流の通電および遮断を行う主一次コイル通電手段と、前記主一次コイルの通電遮断タイミング以降に前記点火制御手段より出力される重畳信号に基づいて、前記副一次コイルへの前記副一次コイル電流の通電および遮断を行う副一次コイル通電手段と、前記副一次コイルへの前記副一次コイル電流の通電による重畳制御が正常に行われているか否かを判定し、前記重畳制御が正常でないと判定した場合には、前記重畳制御の異常を報知する重畳制御状態監視手段と、を備えることを特徴とする。 In order to solve the above problems, an ignition device for an internal combustion engine provides discharge energy to the secondary side of the ignition coil by controlling the supply of electricity to the ignition coil by turning on and off an ignition signal from an ignition control means. In an ignition device for an internal combustion engine that causes a spark discharge in a spark plug, the ignition coil has a magnetic flux in a forward direction that increases when the main primary current is applied when the ignition signal is on, and when the ignition signal is off. The main primary coil becomes such that the amount of forward magnetic flux decreases when the main primary current is cut off, and a sub-primary coil current is passed through the main primary coil during a discharge period after the timing of cutting off the main primary current. As a result, a sub-primary coil that generates magnetic flux in a blocking direction opposite to the forward direction is connected at one end to the spark plug, and magnetic flux changes between the main primary coil and the sub-primary coil act to generate the discharge energy. a secondary coil given to the main primary coil, and a main primary coil energizing means for energizing and interrupting the main primary current to the main primary coil based on the ignition signal, and a timing after the energization cutoff timing of the main primary coil. auxiliary primary coil energizing means for energizing and cutting off the auxiliary primary coil current to the auxiliary primary coil based on a superimposed signal output from the ignition control means; A superimposition control state monitoring means for determining whether superimposition control by energization is being performed normally, and notifying an abnormality of the superposition control when it is determined that the superposition control is not normal. Features.
また、上記構成において、前記重畳制御状態監視手段は、前記副一次コイル電流が予め定めた上限閾値と下限閾値との間である適正範囲内にあることに基づいて、前記重畳制御が正常状態であると判定し、前記副一次コイル電流が前記適正範囲を外れることに基づいて、前記重畳制御が異常状態であると判定する重畳制御状態判定手段と、前記重畳制御状態判定手段が前記重畳制御の異常状態を判定することに基づいて、前記重畳制御の異常状態発生を報知する異常状態報知手段と、を備えるようにしてもよい。 In the above configuration, the superimposition control state monitoring means determines whether the superimposition control is in a normal state based on the fact that the sub-primary coil current is within an appropriate range between a predetermined upper and lower threshold. superimposing control state determining means for determining that the superimposing control is in an abnormal state based on the sub-primary coil current being out of the appropriate range; The apparatus may further include an abnormal state notifying means for notifying the occurrence of an abnormal state of the superimposed control based on determining the abnormal state.
また、上記構成において、前記重畳制御状態判定手段は、前記副一次コイル電流が前記上限閾値を上回ることに基づいて、前記重畳制御が過剰異常状態であると判定するようにしてもよい。 Further, in the above configuration, the superimposition control state determining means may determine that the superimposition control is in an excessive abnormal state based on the fact that the sub-primary coil current exceeds the upper limit threshold.
また、上記構成において、前記重畳制御状態判定手段は、前記副一次コイル電流が前記下限閾値を下回ることに基づいて、前記重畳制御が不足異常状態であると判定するようにしてもよい。 Further, in the above configuration, the superimposition control state determining means may determine that the superimposition control is in an insufficient abnormal state based on the fact that the sub-primary coil current is less than the lower limit threshold.
また、上記構成において、前記重畳制御が正常状態であるときに、前記副一次コイル通電手段の動作によって前記副一次コイルに流れ始めた前記副一次コイル電流が、前記下限閾値に達するまでに必要十分な経過時間として予め設定した判定開始猶予期間の経過を判定開始タイミングとし、前記重畳制御状態判定手段が前記重畳制御の状態判定を行う判定期間を検出する判定期間検出手段を備え、前記重畳制御状態判定手段は、前記判定期間検出手段が検出した判定期間のみ、前記重畳制御の状態判定を行うようにしてもよい。 Further, in the above configuration, when the superimposition control is in a normal state, the sub-primary coil current that has started flowing to the sub-primary coil by the operation of the sub-primary coil energizing means is necessary and sufficient until it reaches the lower limit threshold. the superimposition control state determination means includes a determination period detection means for detecting a determination period during which the superposition control state determination means determines the state of the superposition control, with the elapse of a determination start grace period preset as an elapsed time as the determination start timing; The determination means may determine the state of the superimposition control only during the determination period detected by the determination period detection means.
また、上記構成において、前記異常状態報知手段は、前記点火制御手段から前記重畳信号が送信される重畳信号線を介して異常状態発生信号を送信することで、前記重畳制御の異常状態発生を前記点火制御手段へ報知するようにしてもよい。 In the above configuration, the abnormal state notification means may notify the abnormal state occurrence of the superimposed control by transmitting an abnormal state occurrence signal via a superimposed signal line through which the superimposed signal is transmitted from the ignition control means. It is also possible to notify the ignition control means.
上記構成の内燃機関用点火装置によれば、重畳制御状態監視手段が、副一次コイルへの副一次コイル電流の通電による重畳制御が正常に行われているか否かを判定し、重畳制御が正常でないと判定した場合には、重畳制御の異常を報知する。従って、重畳放電制御が適正な状態でないときは、迅速に対処することが可能となる。 According to the ignition device for an internal combustion engine configured as described above, the superimposition control state monitoring means determines whether or not the superposition control by energizing the sub-primary coil current to the sub-primary coil is being performed normally, and the superposition control is performed normally. If it is determined that this is not the case, an abnormality in the superimposition control is notified. Therefore, when the superimposed discharge control is not in an appropriate state, it is possible to quickly take action.
次に、本実施形態に係る内燃機関用点火装置１を、添付図面に基づいて詳細に説明する。 Next, the ignition device 1 for an internal combustion engine according to the present embodiment will be described in detail based on the accompanying drawings.
図１に示す内燃機関用点火装置１は、内燃機関の気筒毎に設けられる１つの点火プラグ２と、この点火プラグ２に放電火花を発生させる機能を集約状に設けた点火コイルユニット１０を備える。また、点火コイルユニット１０の動作タイミングを指示する点火信号Ｓｉ等を適宜なタイミングで出力する点火制御手段としての機能は、内燃機関駆動制御装置３（例えば、車両に標準搭載されているＥＣＵ等）が担う。点火コイルユニット１０への供給電源には、車両バッテリ等の直流電源４を用いる。なお、内燃機関が多気筒の場合は、気筒毎の点火コイルユニット１０に対する点火制御を内燃機関駆動制御装置３が統括的に行っても良いし、各気筒に対応した点火制御手段を個別に設けるようにしても良い。 The ignition device 1 for an internal combustion engine shown in FIG. 1 includes one spark plug 2 provided for each cylinder of the internal combustion engine, and an ignition coil unit 10 in which the spark plug 2 is provided with a function of generating discharge sparks. . Further, the function as an ignition control means for outputting an ignition signal Si, etc. that instructs the operation timing of the ignition coil unit 10 at an appropriate timing is performed by an internal combustion engine drive control device 3 (for example, an ECU etc. that is standardly installed in a vehicle). is in charge. A DC power source 4 such as a vehicle battery is used to supply power to the ignition coil unit 10. Note that when the internal combustion engine has multiple cylinders, the internal combustion engine drive control device 3 may perform ignition control for the ignition coil unit 10 for each cylinder in an integrated manner, or ignition control means corresponding to each cylinder may be provided individually. You can do it like this.
点火コイルユニット１０は、点火コイル１１や制御基板等を所要形状のケース１２に収納して一体構造としたユニットである。このケース１２の適所には、高圧端子１２１とコネクタ１２２を設けてあり、高圧端子１２１を介して点火プラグ２を接続すると共に、コネクタ１２２を介して内燃機関駆動制御装置３や直流電源４、接地ライン等と接続する。 The ignition coil unit 10 is an integrated unit in which an ignition coil 11, a control board, etc. are housed in a case 12 having a desired shape. A high-voltage terminal 121 and a connector 122 are provided at appropriate locations on the case 12. The spark plug 2 is connected via the high-voltage terminal 121, and the internal combustion engine drive control device 3, DC power source 4, and ground are connected via the connector 122. Connect to line, etc.
点火コイル１１は、主一次コイル１１１ａ（例えば、１１４ターン）と副一次コイル１１１ｂ（例えば、２０ターン）に生ずる磁束を二次コイル１１２（例えば、９３４８ターン）に効率良く作用させるものである。例えば、高透磁性材料で形成したセンターコア１１３を取り巻くように主一次コイル１１１ａおよび副一次コイル１１１ｂを配置し、更にその外側に二次コイル１１２を配置した構造である。 The ignition coil 11 causes the magnetic flux generated in the main primary coil 111a (for example, 114 turns) and the sub-primary coil 111b (for example, 20 turns) to efficiently act on the secondary coil 112 (for example, 9348 turns). For example, a main primary coil 111a and a sub-primary coil 111b are arranged to surround a center core 113 made of a highly permeable material, and a secondary coil 112 is further arranged outside the main primary coil 111a.
主一次コイル１１１ａの一方端は、コネクタ１２２を介して直流電源４と接続され、電源電圧ＶＢ＋（例えば、１４Ｖ）が印加される。主一次コイル１１１ａの他方端は、主一次コイル通電手段１３に接続される。この主一次コイル通電手段１３は、内燃機関駆動制御装置３からの点火信号Ｓｉに基づいて、主一次コイル１１１ａへの通電および遮断を行うもので、ＩＧＢＴ（Insulated Gate Bipolar Transistor:絶縁ゲートバイポーラトランジスタ）等の点火スイッチ素子１３１を備える。点火スイッチ素子１３１のコレクタには主一次コイル１１１ａが接続され、点火スイッチ素子１３１のエミッタはコネクタ１２２を介して接地点ＧＮＤに接続される。なお、主一次コイル通電手段１３は、点火信号Ｓｉで点火スイッチ素子１３１を直接駆動させるものでも良いし、点火信号Ｓｉに基づいて点火スイッチ素子１３１の駆動信号を生成するイグナイタの機能を供えるものでも良い。また、二次コイル１１２の一方端は高圧端子１２１を介して点火プラグ２と接続され、他方端は整流素子を介して給電線に接続される。 One end of the main primary coil 111a is connected to the DC power supply 4 via the connector 122, and a power supply voltage VB+ (for example, 14V) is applied thereto. The other end of the main primary coil 111a is connected to the main primary coil current supply means 13. The main primary coil energizing means 13 energizes and interrupts the main primary coil 111a based on the ignition signal Si from the internal combustion engine drive control device 3, and is an IGBT (Insulated Gate Bipolar Transistor). An ignition switch element 131 such as the above is provided. The main primary coil 111a is connected to the collector of the ignition switch element 131, and the emitter of the ignition switch element 131 is connected to the ground point GND via the connector 122. The main primary coil energizing means 13 may be one that directly drives the ignition switch element 131 with the ignition signal Si, or may have the function of an igniter that generates a drive signal for the ignition switch element 131 based on the ignition signal Si. good. Further, one end of the secondary coil 112 is connected to the spark plug 2 via a high voltage terminal 121, and the other end is connected to a power supply line via a rectifying element.
放電サイクルの適宜なタイミングで内燃機関駆動制御装置３より出力される点火信号Ｓｉは、コネクタ１２２を介して点火コイルユニット１０に供給され、点火信号線Ｌ１を介して点火スイッチ素子１３１のゲートに入力される。そして、点火信号Ｓｉが点火スイッチ素子１３１のゲートに入力されると（例えば、点火信号Ｓｉの信号レベルがＬからＨに変わると）、点火スイッチ素子１３１がオンになり、主一次コイル１１１ａの非給電側端部が接地点ＧＮＤに接続される。これにより、主一次コイル１１１ａには、給電側から接地側に向かう主一次コイル電流（以下、一次電流Ｉ１ａという）が流れ始め、一次電流Ｉ１ａの流量は増加してゆき、一次電流Ｉ１ａの流量に応じて発生する通電磁束の磁束量が磁界のエネルギーとして蓄積される。 The ignition signal Si output from the internal combustion engine drive control device 3 at appropriate timing of the discharge cycle is supplied to the ignition coil unit 10 via the connector 122, and input to the gate of the ignition switch element 131 via the ignition signal line L1. be done. When the ignition signal Si is input to the gate of the ignition switch element 131 (for example, when the signal level of the ignition signal Si changes from L to H), the ignition switch element 131 is turned on and the main primary coil 111a is turned on. The power supply side end is connected to the ground point GND. As a result, a main primary coil current (hereinafter referred to as primary current I1a) starts to flow from the power supply side to the ground side in the main primary coil 111a, and the flow rate of the primary current I1a increases, and the flow rate of the primary current I1a increases. The amount of magnetic flux of the electromagnetic flux generated accordingly is accumulated as magnetic field energy.
上記のようにエネルギーが蓄積された後、主一次コイル１１１ａへの通電が所定の点火タイミングで遮断されると（例えば、点火信号Ｓｉの信号レベルがＨからＬに変わると）、高圧の起電力が二次コイル１１２に生じて、接続配線等の微少なコンデンサにエネルギーが蓄積されて二次側の電圧が急激に上昇して行く。そして、二次側の電圧が絶縁破壊電圧に達すると、点火プラグ２の放電ギャップ間に火花放電が発生して二次電流Ｉ２が流れ、気筒燃焼室内の混合気に着火する。 After energy has been accumulated as described above, when the power to the main primary coil 111a is cut off at a predetermined ignition timing (for example, when the signal level of the ignition signal Si changes from H to L), a high voltage electromotive force is generated. occurs in the secondary coil 112, energy is accumulated in minute capacitors such as connection wiring, and the voltage on the secondary side rapidly increases. When the voltage on the secondary side reaches the dielectric breakdown voltage, a spark discharge occurs between the discharge gaps of the spark plug 2, a secondary current I2 flows, and the air-fuel mixture in the cylinder combustion chamber is ignited.
一方、主一次コイル１１１ａと同様に、センターコア１１３を介して二次コイル１１２に磁界を作用させる副一次コイル１１１ｂは、その一方端がコネクタ１２２を介して直流電源４と接続され、電源電圧ＶＢ＋（例えば、１４Ｖ）が印加される。なお、主一次コイル１１１ａと副一次コイル１１１ｂで電源を共有せず、別々の電源を用いるようにしても良い。この副一次コイル１１１ｂに副一次コイル電流Ｉ１ｂが流れると、主一次コイル１１１ａへの通電時に生じる磁束の向き（以下、順方向という）とは逆の向き（以下、遮断方向という）に磁束を発生させる。すなわち、主一次コイル１１１ａへの通電遮断によって順方向磁束が急激に減ぜられると共に、副一次コイル１１１ｂへ副一次コイル電流Ｉ１ｂを流すことによって遮断方向の磁束を生じさせれば、二次コイル１１２に作用する磁束の変化量が増大し、二次側に与える放電エネルギーを高めることができる。 On the other hand, like the main primary coil 111a, the sub-primary coil 111b which applies a magnetic field to the secondary coil 112 via the center core 113 has one end connected to the DC power supply 4 via the connector 122, and has a power supply voltage VB+ (for example, 14V) is applied. Note that the main primary coil 111a and the sub-primary coil 111b may not share a power source, but may use separate power sources. When the sub-primary coil current I1b flows through the sub-primary coil 111b, a magnetic flux is generated in the opposite direction (hereinafter referred to as the cut-off direction) to the direction of the magnetic flux generated when the main primary coil 111a is energized (hereinafter referred to as the forward direction). let That is, if the forward direction magnetic flux is rapidly reduced by cutting off the current to the main primary coil 111a, and the magnetic flux in the blocking direction is generated by flowing the sub-primary coil current I1b to the sub-primary coil 111b, the secondary coil 112 The amount of change in magnetic flux acting on the secondary side increases, and the discharge energy given to the secondary side can be increased.
副一次コイル１１１ｂと、副一次コイル１１１ｂへの通電制御を行う機能を含めて重畳機能部１４とする。重畳機能部１４は、例えば、副一次コイル通電手段１５と重畳制御状態監視手段１６を備え、副一次コイル１１１ｂへの通電および遮断を制御すると共に、重畳制御が適正に行われているかを監視する。副一次コイル通電手段１５は、重畳信号成形手段１５１と重畳制御手段１５２とＩＧＢＴ等の能動素子で構成する重畳スイッチ素子１５３を備える。また、重畳制御状態監視手段１６は、重畳制御状態判定手段１６１と判定期間検出手段１６２と異常状態報知手段１６３を備える。さらに、重畳スイッチ素子１５３よりも接地側に電流検出用抵抗１４１を設けてあり、電流検出用抵抗１４１による電圧降下に基づいて、副一次コイル電流Ｉ１ｂを検知できるようにしてある。 The sub-primary coil 111b and the function of controlling energization to the sub-primary coil 111b are included in the superimposition function section 14. The superimposition function section 14 includes, for example, a sub-primary coil energizing means 15 and a superimposition control state monitoring means 16, and controls energization and cutoff of the sub-primary coil 111b, and monitors whether superimposition control is being performed properly. . The sub-primary coil energizing means 15 includes a superimposed signal shaping means 151, a superimposing control means 152, and a superimposing switch element 153 composed of an active element such as an IGBT. Further, the superimposition control state monitoring means 16 includes a superposition control state determination means 161 , a determination period detection means 162 , and an abnormal state notification means 163 . Further, a current detection resistor 141 is provided on the ground side of the superimposing switch element 153, so that the sub-primary coil current I1b can be detected based on the voltage drop caused by the current detection resistor 141.
高ＥＧＲ燃焼必要時など、主一次コイル１１１ａのみでは安定した点火制御を行えない場合に限って、重畳機能部１４による重畳動作を行い、特に重畳動作の必要が無ければ、重畳機能部１４を機能させず、主一次コイル１１１ａによる通常の点火動作を行う。なお、重畳動作の要否は、例えば点火制御手段としての内燃機関駆動制御装置３が判断し、重畳動作が必要な場合に限り、内燃機関駆動制御装置３から点火コイルユニット１０へ重畳信号Ｓｐを出力することで、重畳機能部１５による重畳動作が実行される。以下、重畳動作を実行するために、副一次コイル１１１ｂに副一次コイル電流Ｉ１ｂを流す重畳制御について説明する。 Only when stable ignition control cannot be performed using the main primary coil 111a alone, such as when high EGR combustion is required, the superimposition function section 14 performs the superposition operation, and if there is no particular need for the superposition operation, the superposition function section 14 is activated. Instead, the main primary coil 111a performs a normal ignition operation. The necessity of the superimposed operation is determined by, for example, the internal combustion engine drive control device 3 as an ignition control means, and only when the superimposition operation is necessary, the internal combustion engine drive control device 3 sends a superimposition signal Sp to the ignition coil unit 10. By outputting, the superimposing operation by the superimposing function unit 15 is executed. Hereinafter, superimposition control in which the sub-primary coil current I1b is caused to flow through the sub-primary coil 111b in order to execute the superimposition operation will be described.
副一次コイル１１１ｂの他方端（非給電側端）は、ＩＧＢＴで構成した重畳スイッチ素子１５３のコレクタに接続される。重畳スイッチ素子１５３のエミッタはコネクタ１２２を介して接地点ＧＮＤに接続される。重畳スイッチ素子１５３は、例えば、ゲートへ入力される能動信号に応じてコレクタ－エミッタ間の電流を増減させる能動素子で構成し、後述する重畳制御手段１５２から出力される能動信号に応じて、副一次コイル１１１ｂへの通電・遮断および通電量の増減を制御する。 The other end (non-power feeding side end) of the sub-primary coil 111b is connected to the collector of a superimposition switch element 153 made up of an IGBT. The emitter of the superimposition switch element 153 is connected to the ground point GND via the connector 122. The superposition switch element 153 is composed of, for example, an active element that increases or decreases the current between the collector and the emitter according to an active signal input to the gate, and controls the sub-type switch according to an active signal output from the superposition control means 152, which will be described later. It controls energization/cutoff of the primary coil 111b and increase/decrease of the amount of energization.
重畳スイッチ素子１５３の動作基準となる重畳信号Ｓｐは、点火信号Ｓｉによる点火タイミング以降（主一次コイル１１１ａの一次電流遮断時以降）に出力される信号で、内燃機関駆動制御装置３から供給される。重畳信号線Ｌ２を介して重畳機能部１４へ供給された重畳信号Ｓｐは、重畳信号成形手段１５１にて適宜な重畳指示信号Ｓｐ′に成形され、重畳指示信号線Ｌ３を介して重畳制御手段１５２へ供給される。この重畳指示信号Ｓｐ′に基づいて、重畳制御手段１５２が適宜な能動信号を生成し、重畳スイッチ素子１５３へ出力する。 The superimposed signal Sp, which serves as the operating reference for the superimposed switch element 153, is a signal that is output after the ignition timing by the ignition signal Si (after the primary current cutoff of the main primary coil 111a), and is supplied from the internal combustion engine drive control device 3. . The superimposition signal Sp supplied to the superimposition function unit 14 via the superimposition signal line L2 is shaped into an appropriate superposition instruction signal Sp' by the superposition signal forming means 151, and then sent to the superposition control means 152 via the superposition instruction signal line L3. supplied to Based on this superposition instruction signal Sp', superposition control means 152 generates an appropriate active signal and outputs it to superposition switch element 153.
なお、副一次コイル１１１ｂへの通電量は、重畳動作開始から時間経過に伴って徐々に増やして行くと、消費電力を抑えつつ、二次側の高電流期間を長くすることができ、効率良い安定した点火能力を実現できる。重畳制御手段１５２における能動信号の生成手法は特に限定されるものではないが、例えば、コンデンサの電荷蓄積状態を指標とすれば、耐熱性および耐ノイズ性の高いディスクリート部品を用いた比較的簡単な構造で能動信号の生成機能を実現できる。このとき、重畳制御手段１５２は、電流検出用抵抗１４１による電圧降下に基づいて副一次コイル電流Ｉ１ｂをモニタし、副一次コイル電流Ｉ１ｂが適切な流量変化となるようにフィードバック制御してもよい（図１中、破線矢印で示す）。 Note that if the amount of current applied to the sub-primary coil 111b is gradually increased over time from the start of the superimposition operation, the high current period on the secondary side can be lengthened while suppressing power consumption, which is efficient. Achieves stable ignition performance. The method of generating the active signal in the superimposition control means 152 is not particularly limited, but for example, if the charge accumulation state of the capacitor is used as an index, a relatively simple method using discrete components with high heat resistance and noise resistance may be used. The structure can realize the function of generating active signals. At this time, the superimposition control means 152 may monitor the sub-primary coil current I1b based on the voltage drop caused by the current detection resistor 141, and perform feedback control so that the sub-primary coil current I1b has an appropriate flow rate change ( (indicated by a dashed arrow in FIG. 1).
上述したように、重畳制御手段１５２によって適正な能動信号を生成して重畳スイッチ素子１５３のゲートへ入力させれば、副一次コイル１１１ｂへの適切な通電制御を行うことができ、好適な重畳動作を実現できる。しかしながら、能動素子である重畳スイッチ素子１５３が発熱や素子劣化により正常動作できない場合、重畳制御手段１５２が生成した能動信号に基づく適切な重畳制御が実現されないおそれがある。そこで、重畳機能部１４には重畳制御状態監視手段１６を設けておき、重畳制御が正常に行われているか否かを判定し、重畳制御が正常でないと判定した場合には、重畳制御の異常を報知するのである。 As described above, if an appropriate active signal is generated by the superposition control means 152 and inputted to the gate of the superposition switch element 153, appropriate energization control to the sub-primary coil 111b can be performed, and a suitable superposition operation can be performed. can be realized. However, if the superposition switch element 153, which is an active element, cannot operate normally due to heat generation or element deterioration, there is a possibility that appropriate superposition control based on the active signal generated by the superposition control means 152 may not be realized. Therefore, a superimposition control state monitoring means 16 is provided in the superimposition function section 14 to determine whether or not the superposition control is being performed normally.If it is determined that the superposition control is not normal, an abnormality in the superposition control is detected. It is to inform you.
重畳制御状態監視手段１６において、重畳制御が正常か異常かを判定する機能は、重畳制御状態判定手段１６１が担う。重畳制御状態判定手段１６１は、副一次コイル電流Ｉ１ｂが予め定めた上限閾値ＴＨ－ｔと下限閾値ＴＨ－ｂとの間である適正範囲内にあれば、重畳制御が正常状態であると判定する。逆に、副一次コイル電流Ｉ１ｂが上限閾値ＴＨ－ｔを越えるか下限閾値ＴＨ－ｂに満たない場合（適正範囲を外れる場合）、重畳制御状態判定手段１６１は、重畳制御が異常状態であると判定する。なお、上限閾値ＴＨ－ｔと下限閾値ＴＨ－ｂを含まない範囲を正常状態、上限閾値ＴＨ－ｔと下限閾値ＴＨ－ｂを含む範囲を異常状態と判定するようにしても構わない。 In the superimposition control state monitoring means 16, the superposition control state determination means 161 has the function of determining whether the superposition control is normal or abnormal. The superimposing control state determining means 161 determines that the superimposing control is in a normal state if the sub-primary coil current I1b is within an appropriate range between a predetermined upper limit threshold TH-t and lower limit threshold TH-b. . Conversely, if the sub-primary coil current I1b exceeds the upper limit threshold TH-t or is less than the lower limit threshold TH-b (outside the appropriate range), the superimposition control state determining means 161 determines that the superimposition control is in an abnormal state. judge. Note that the range that does not include the upper threshold TH-t and the lower threshold TH-b may be determined to be a normal state, and the range that includes the upper threshold TH-t and the lower threshold TH-b may be determined to be an abnormal state.
重畳制御状態判定手段１６１は、電流検出用抵抗１４１による接地点ＧＮＤとの電位差Ｖｓ１を検出するので、Ｖｓ１検出値から一次コイル電流Ｉ１ｂを求めないで、Ｖｓ１検出値から重畳制御の正常および異常を判定するようにしてもよい。例えば、副一次コイル電流Ｉ１ｂの上限閾値ＴＨ－ｔに対応するＶｓ１検出値を上限閾値電圧ＴＨ－ｔｖと設定し、副一次コイル電流Ｉ１ｂの下限閾値ＴＨ－ｂに対応するＶｓ１検出値を下限閾値電圧ＴＨ－ｂｖと設定しておく。重畳制御状態判定手段１６１は、Ｖｓ１検出値が上限閾値電圧ＴＨ－ｔｖと下限閾値電圧ＴＨ－ｂｖとの間であれば、重畳制御が正常状態であると判定できる。逆に、Ｖｓ１検出値が上限閾値電圧ＴＨ－ｔｖを越えるか、下限閾値電圧ＴＨ－ｂｖに満たない場合、重畳制御状態判定手段１６１は、重畳制御が異常状態であると判定できる。 Since the superimposition control state determination means 161 detects the potential difference Vs1 between the current detection resistor 141 and the ground point GND, it does not determine the primary coil current I1b from the Vs1 detection value, but determines whether the superposition control is normal or abnormal from the Vs1 detection value. It may be determined. For example, the Vs1 detected value corresponding to the upper limit threshold TH-t of the sub-primary coil current I1b is set as the upper limit threshold voltage TH-tv, and the Vs1 detected value corresponding to the lower limit threshold TH-b of the sub-primary coil current I1b is set as the lower limit threshold. Set the voltage as TH-bv. The superimposing control state determining means 161 can determine that the superimposing control is in a normal state if the detected value of Vs1 is between the upper limit threshold voltage TH-tv and the lower limit threshold voltage TH-bv. Conversely, when the Vs1 detection value exceeds the upper limit threshold voltage TH-tv or is less than the lower limit threshold voltage TH-bv, the superimposing control state determining means 161 can determine that the superimposing control is in an abnormal state.
また、重畳制御状態判定手段１６１は、重畳制御の異常状態をより詳細に判定するようにしてもよい。例えば、副一次コイル電流Ｉ１ｂが上限閾値ＴＨ－ｔを上回る（Ｖｓ１検出値が上限閾値電圧ＴＨ－ｔｖを上回る）ことに基づいて、重畳制御が過剰異常状態であると判定する。逆に、副一次コイル電流Ｉ１ｂが下限閾値ＴＨ－ｂを下回る（Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖを下回る）ことに基づいて、重畳制御が不足異常状態であると判定する。このように、重畳制御が過剰異常状態であるか、不足異常状態であるかの区別を重畳制御状態判定手段１６１によって判定できれば、その後に行う対処のための有用な報知情報とすることができる。 Further, the superimposition control state determination means 161 may determine the abnormal state of the superposition control in more detail. For example, based on the fact that the sub-primary coil current I1b exceeds the upper limit threshold TH-t (the detected value of Vs1 exceeds the upper limit threshold voltage TH-tv), it is determined that the superimposition control is in an excessive abnormal state. Conversely, based on the fact that the sub-primary coil current I1b is less than the lower limit threshold TH-b (the detected value of Vs1 is less than the lower limit threshold voltage TH-bv), it is determined that the superimposition control is in an insufficient abnormal state. In this way, if the superimposed control state determining means 161 can determine whether the superimposed control is in an excessive abnormal state or an insufficient abnormal state, it can be used as useful notification information for subsequent countermeasures.
なお、重畳制御期間（重畳信号ＳｐがＯＮになっている規定ＯＮ幅の期間）中の短時間であっても、副一次コイル電流Ｉ１ｂが上限閾値ＴＨ－ｔを上回っていると（Ｖｓ１検出値が上限閾値電圧ＴＨ－ｔｖを上回っていると）、重畳スイッチ素子１５３や巻線の発熱に起因する故障が懸念される。したがって、重畳制御期間中に一瞬でも、副一次コイル電流Ｉ１ｂが上限閾値ＴＨ－ｔを上回ったら（Ｖｓ１検出値が上限閾値電圧ＴＨ－ｔｖを上回ったら）、重畳制御状態判定手段１６１によって重畳制御が過剰異常状態であると判定することが望ましい。無論、一次コイル電流Ｉ１ｂが適正範囲を超えた時間の重畳制御期間に対する割合が、所定値以上のときに限って異常と判定するなど、過剰異常状態の判定基準を定めてもよい。 Note that even for a short time during the superimposition control period (period of specified ON width when the superimposition signal Sp is ON), if the sub-primary coil current I1b exceeds the upper limit threshold TH-t (Vs1 detected value exceeds the upper limit threshold voltage TH-tv), there is a concern that failure may occur due to heat generation in the superposition switch element 153 or the winding. Therefore, if the sub-primary coil current I1b exceeds the upper limit threshold TH-t even for a moment during the superimposed control period (if the detected value of Vs1 exceeds the upper limit threshold voltage TH-tv), the superimposed control state determining means 161 determines whether the superimposed control is It is desirable to determine that the state is in an excessively abnormal state. Of course, a criterion for determining an excessively abnormal state may be determined, such as determining that the condition is abnormal only when the ratio of the time during which the primary coil current I1b exceeds the appropriate range to the superimposed control period is equal to or greater than a predetermined value.
しかしながら、重畳制御期間中に一瞬でも、副一次コイル電流Ｉ１ｂが下限閾値ＴＨ－ｂを上回ったら（Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖを上回ったら）、重畳制御状態判定手段１６１によって重畳制御が正常状態と判定することは問題である。このような場合、重畳制御期間中の殆どの時間で副一次コイル電流Ｉ１ｂが下限閾値ＴＨ－ｂを下回っている（Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖを下回っている）のであるから、副一次コイル１１１ｂに必要十分な電流が流れていないと推定できる。副一次コイル１１１ｂに必要十分な電流が流れない場合、二次側に与える放電エネルギーが不足して、燃焼性能が低下し、二酸化炭素などの環境負荷物質の増加や燃費低下が懸念される。そこで、重畳制御状態判定手段１６１は、副一次コイル電流Ｉ１ｂが所定の判定期間に亘って下限閾値ＴＨ－ｂを上回ったら（Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖを上回ったら）、重畳制御が正常状態と判定することが望ましい。 However, if the sub-primary coil current I1b exceeds the lower limit threshold TH-b even for a moment during the superimposed control period (if the detected value of Vs1 exceeds the lower limit threshold voltage TH-bv), the superimposed control state determining means 161 will cause the superimposed control to be stopped. Determining that the state is normal is a problem. In such a case, since the sub-primary coil current I1b is below the lower limit threshold TH-b (Vs1 detection value is below the lower limit threshold voltage TH-bv) most of the time during the superimposed control period, the sub-primary coil current I1b is below the lower limit threshold voltage TH-bv. It can be estimated that a necessary and sufficient current is not flowing through the primary coil 111b. When a necessary and sufficient current does not flow through the sub-primary coil 111b, there is a shortage of discharge energy given to the secondary side, resulting in a decrease in combustion performance, and there are concerns about an increase in environmentally hazardous substances such as carbon dioxide and a decrease in fuel efficiency. Therefore, if the sub-primary coil current I1b exceeds the lower limit threshold TH-b for a predetermined determination period (if the detected value of Vs1 exceeds the lower limit threshold voltage TH-bv), the superimposed control state determination means 161 determines that the superimposed control is It is desirable to determine that the condition is normal.
上述した所定の判定期間は、判定期間検出手段１６２によって検出され、重畳制御状態判定手段１６１に報らされる。判定期間の終わり（判定終了タイミング）は、重畳信号ＳｐのＯＦＦタイミング（実質的に、重畳指示信号Ｓｐ′のＯＦＦタイミング）と同じで良い。一方、判定期間の始まり（判定開始タイミング）は、重畳信号ＳｐのＯＮタイミングと同じにするわけにはいかない。副一次コイル電流Ｉ１ｂは、０［Ａ］から徐々に上昇して行くので、重畳制御が正常状態であっても、副一次コイル電流Ｉ１ｂが下限閾値ＴＨ－ｂに達する（Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖに達する）まで、所定の猶予期間が必要だからである。 The above-mentioned predetermined determination period is detected by the determination period detection means 162 and reported to the superimposition control state determination means 161. The end of the determination period (determination end timing) may be the same as the OFF timing of the superimposition signal Sp (substantially the OFF timing of the superposition instruction signal Sp'). On the other hand, the start of the determination period (determination start timing) cannot be made the same as the ON timing of the superimposed signal Sp. Since the sub-primary coil current I1b gradually increases from 0 [A], even if the superimposition control is in a normal state, the sub-primary coil current I1b reaches the lower limit threshold TH-b (when the detected value of Vs1 is the lower limit threshold This is because a predetermined grace period is required until the voltage TH-bv is reached.
そこで、判定期間検出手段１６２は、重畳信号ＳｐのＯＮタイミング（実質的に、重畳指示信号Ｓｐ′のＯＮタイミング）から、予め設定した判定開始猶予期間の経過を判定開始タイミングとして検出する。この判定開始猶予期間は、重畳制御が正常状態であるときに、副一次コイル通電手段１５の動作によって副一次コイル１１１ｂに流れ始めた副一次コイル電流Ｉ１ｂが、下限閾値ＴＨ－ｂに達するまでに必要十分な経過時間として設定する。判定開始猶予期間が経過した時点で、副一次コイル電流Ｉ１ｂが下限閾値ＴＨ－ｂに（Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖに）達していなければ、二次側に与える放電エネルギーが不足する可能性が高いので、重畳制御は不足異常状態とみなせる。よって、判定期間検出手段１６２が検出した判定期間のみ、重畳制御状態判定手段１６１が重畳制御の状態判定を行うようにすれば、正常状態と不足異常状態の適切な判定が可能となる。 Therefore, the determination period detection means 162 detects the elapse of a preset determination start grace period from the ON timing of the superimposition signal Sp (substantially the ON timing of the superposition instruction signal Sp') as the determination start timing. This judgment start grace period is a time period during which the sub-primary coil current I1b, which has started flowing to the sub-primary coil 111b due to the operation of the sub-primary coil energizing means 15, reaches the lower limit threshold value TH-b when the superimposition control is in a normal state. Set as a necessary and sufficient elapsed time. If the sub-primary coil current I1b has not reached the lower limit threshold TH-b (the Vs1 detection value has reached the lower threshold voltage TH-bv) when the judgment start grace period has elapsed, the discharge energy given to the secondary side will be insufficient. Since this possibility is high, superimposed control can be regarded as an insufficient abnormal state. Therefore, if the superimposed control state determining means 161 determines the state of the superimposed control only during the determination period detected by the determination period detecting means 162, it becomes possible to appropriately determine the normal state and the insufficient abnormal state.
具体的には、判定期間検出手段１６２によって報らされる判定期間に亘って、副一次コイル電流Ｉ１ｂが下限閾値ＴＨ－ｂを上回った（Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖを上回った）場合、重畳制御状態判定手段１６１は、重畳制御が正常状態と判定する。一方、判定期間検出手段１６２によって報らされる判定期間中に、一瞬でも副一次コイル電流Ｉ１ｂが下限閾値ＴＨ－ｂを下回った（Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖを下回った）場合、重畳制御状態判定手段１６１は、重畳制御が不足異常状態と判定する。 Specifically, the sub-primary coil current I1b exceeded the lower limit threshold TH-b over the determination period reported by the determination period detection means 162 (the detected value of Vs1 exceeded the lower limit threshold voltage TH-bv). In this case, the superimposing control state determining means 161 determines that the superimposing control is in a normal state. On the other hand, during the determination period reported by the determination period detection means 162, if the sub-primary coil current I1b falls below the lower limit threshold TH-b even for a moment (the detected value of Vs1 falls below the lower limit threshold voltage TH-bv), The superimposition control state determination means 161 determines that the superposition control is in an insufficient abnormal state.
重畳制御状態判定手段１６１が重畳制御の異常状態を判定すると、この判定情報に基づいて、異常状態報知手段１６３が重畳制御の異常状態発生を報知する。なお、点火コイルユニット１０に異常報知ランプ等を設けて点灯させるようにしてもよいが、通常の車両走行時に点火コイルユニット１０の異常報知ランプが人目に触れることはないので、本実施形態では報知対象を内燃機関駆動制御装置３とする。異常状態報知手段１６３か重畳制御の異常状態発生を報らされた内燃機関駆動制御装置３は、ダッシュボードなどに可視表示させたり、合成音声等で可聴報知させたりして、運転者等に異常発生を知らせるのである。なお、内燃機関の点火サイクルは高速で行われるので、イレギュラーな要因で１回のみ異常状態と判定されたようなケースを逐一知らせるのは煩雑であるから、例えば、同じ異常状態が所定回数連続して発生した場合にのみ、内燃機関駆動制御装置３が報知動作を行うようにしてもよい。 When the superimposed control state determining means 161 determines that the superimposed control is abnormal, the abnormal state notification means 163 notifies the occurrence of the abnormal state of the superimposed control based on this determination information. Note that an abnormality notification lamp or the like may be provided in the ignition coil unit 10 and turned on, but since the abnormality notification lamp of the ignition coil unit 10 is not visible to the public during normal vehicle driving, in this embodiment, the abnormality notification lamp is not displayed. The target is an internal combustion engine drive control device 3. The internal combustion engine drive control device 3, which has been notified of the occurrence of an abnormal state in the superimposed control by the abnormal state notification means 163, displays the abnormal state on the dashboard or the like, or audibly reports the abnormal state using synthesized voice, etc., to alert the driver, etc. This is to notify the outbreak. In addition, since the ignition cycle of an internal combustion engine is performed at high speed, it is cumbersome to notify each case in which an abnormal state is determined only once due to irregular factors. The internal combustion engine drive control device 3 may perform the notification operation only when this occurs.
異常状態報知手段１６３が内燃機関駆動制御装置３へ異常状態を報知する手法は特に限定されないが、本実施形態では、重畳信号線Ｌ２を介して異常状態を報せる異常状態報知信号を送信するものとした。異常状態報知手段１６３は、異常状態報知信号線Ｌ４によって重畳信号線Ｌ２に接続され、異常状態報知信号に応じて異常状態報知信号線Ｌ４の電位レベルを変化させることで、重畳信号線Ｌ２の電位レベルを異常状態報知信号に応じて変化させる。かくすれば、内燃機関駆動制御装置３は、重畳信号線Ｌ２のレベル変化として異常状態報知信号を受信できる。 The method by which the abnormal state notification means 163 notifies the internal combustion engine drive control device 3 of the abnormal state is not particularly limited, but in this embodiment, an abnormal state notification signal that reports the abnormal state is transmitted via the superimposed signal line L2. And so. The abnormal state notification means 163 is connected to the superimposed signal line L2 by an abnormal state notification signal line L4, and changes the potential level of the superimposed signal line L2 by changing the potential level of the abnormal state notification signal line L4 according to the abnormal state notification signal. The level is changed according to the abnormal state notification signal. In this way, the internal combustion engine drive control device 3 can receive the abnormal state notification signal as a level change of the superimposed signal line L2.
ただし、重畳信号線Ｌ２は重畳信号Ｓｐを副一次コイル通電手段１５へ供給することが本来の役目であるから、重畳信号Ｓｐの入力を異常状態報知信号が阻害しないようにしなければならない。例えば、重畳信号Ｓｐがオフになったタイミングで異常状態報知信号を出力すると、内燃機関駆動制御装置３は、重畳信号Ｓｐをオフにした後も重畳信号線Ｌ２がＯＮ電位のままであることから、異常状態報知信号を受信していると判別できる。なお、異常状態報知手段１６３により出力される異常状態報知信号は、必ずしも重畳信号Ｓｐと同電位にする必要はなく、重畳信号Ｓｐよりも高電位あるいは低電位とすることで、内燃機関駆動制御装置３が識別し易いようにしてもよい。また、異常状態報知信号の出力時間を変えるなどして、内燃機関駆動制御装置３が過剰異常状態と不足異常状態を識別できるようにしてもよい。 However, since the original role of the superimposed signal line L2 is to supply the superimposed signal Sp to the sub-primary coil energizing means 15, it is necessary to prevent the abnormal state notification signal from interfering with the input of the superimposed signal Sp. For example, if the abnormal state notification signal is output at the timing when the superimposed signal Sp is turned off, the internal combustion engine drive control device 3 will detect that the superimposed signal line L2 remains at the ON potential even after the superimposed signal Sp is turned off. , it can be determined that the abnormal state notification signal is being received. Note that the abnormal state notification signal output by the abnormal state notification means 163 does not necessarily have to be at the same potential as the superimposed signal Sp, but can be set at a higher or lower potential than the superimposed signal Sp, so that the internal combustion engine drive control device 3 may be made easy to identify. Furthermore, the output time of the abnormal state notification signal may be changed so that the internal combustion engine drive control device 3 can distinguish between an excessive abnormal state and an insufficient abnormal state.
上述した異常状態報知信号は、重畳信号線Ｌ２を介して重畳信号成形手段１５１にも入力されるので、異常状態報知信号に基づく重畳指示信号Ｓｐ′が重畳指示信号線Ｌ３に出力されてしまい、重畳制御終了後に重畳スイッチ素子１５３がオンになる危険性がある。そこで、異常状態報知手段１６３は、重畳動作規制信号線Ｌ５を介して重畳指示信号線Ｌ３と接続され、異常状態報知信号の出力期間中、異常状態報知手段１６３は重畳動作規制信号線Ｌ５を接地電位に落とすようにした。かくすれば、重畳信号線Ｌ２を介して異常状態報知信号を送信しても、副一次コイル通電手段１５による重畳動作は規制され、重畳制御終了後に重畳スイッチ素子１５３がオンになる危険性を回避できる。 The above-mentioned abnormal state notification signal is also input to the superimposed signal forming means 151 via the superimposed signal line L2, so the superimposed instruction signal Sp' based on the abnormal state notification signal is outputted to the superimposed instruction signal line L3, There is a risk that the superposition switch element 153 will turn on after the superposition control ends. Therefore, the abnormal state notifying means 163 is connected to the superimposing instruction signal line L3 via the superimposing operation regulation signal line L5, and during the output period of the abnormal state notifying signal, the abnormal state notifying means 163 grounds the superimposing operation regulating signal line L5. I tried to lower it to the potential. In this way, even if an abnormal state notification signal is transmitted via the superimposition signal line L2, the superimposition operation by the sub-primary coil energizing means 15 is restricted, and the risk of the superposition switch element 153 being turned on after the superposition control is completed is avoided. can.
なお、本実施形態では、重畳信号線Ｌ２を介して異常状態報知信号を内燃機関駆動制御装置３へ送信するものとしたが、異常状態報知信号の送信手法は特に限定されない。例えば、異常状態報知手段１６３から異常状態報知信号線Ｌ４′（図１中、破線で示す）を介して点火信号線Ｌ１と接続し、点火信号線Ｌ１から内燃機関駆動制御装置３へ異常状態報知信号を送信するようにしてもよい。あるいは、異常状態報知手段１６３と内燃機関駆動制御装置３を直接結ぶ異常状態報知信号線Ｌ４″（図１中、破線で示す）を設け、重畳制御の異常状態発生を専用の信号ラインで内燃機関駆動制御装置３に報知するようにしてもよい。また、異常状態発生の報知先は内燃機関駆動制御装置３に限らず、例えば、自動車両の室内適所に設けた異常状態報知器へ異常状態報知信号を送信し、異常状態報知器によって重畳制御が異常状態であることを運転者等に報知するようにしてもよい。 In this embodiment, the abnormal state notification signal is transmitted to the internal combustion engine drive control device 3 via the superimposed signal line L2, but the method of transmitting the abnormal state notification signal is not particularly limited. For example, the abnormal state notification means 163 is connected to the ignition signal line L1 via the abnormal state notification signal line L4' (indicated by a broken line in FIG. 1), and the abnormal state is notified to the internal combustion engine drive control device 3 from the ignition signal line L1. A signal may also be transmitted. Alternatively, an abnormal state notification signal line L4'' (indicated by a broken line in FIG. 1) that directly connects the abnormal state notification means 163 and the internal combustion engine drive control device 3 may be provided, and the occurrence of an abnormal state in the superimposed control may be detected by a dedicated signal line that connects the internal combustion engine drive control device 3. The drive control device 3 may be notified of the occurrence of the abnormal state.Also, the notification destination of the occurrence of the abnormal state is not limited to the internal combustion engine drive control device 3, but, for example, the abnormal state may be notified to an abnormal state alarm installed at an appropriate location in the interior of the automobile. A signal may be transmitted and an abnormal state alarm may be used to notify the driver or the like that the superimposed control is in an abnormal state.
上記のように構成した重畳機能部１４を備える点火コイルユニット１０を含む内燃機関用点火装置１による重畳動作を、図２に基づき説明する。図２においては、適正状態と不足異常状態と過剰異常状態に分けて例示してある。 A superimposition operation by the internal combustion engine ignition device 1 including the ignition coil unit 10 including the superimposition function section 14 configured as described above will be explained based on FIG. 2. In FIG. 2, a proper state, an insufficient abnormal state, and an excessive abnormal state are illustrated.
点火信号Ｓｉのオン・オフによって主一次コイル１１１ａへの通電・遮断が実行され、高電圧が印加された点火プラグ２に火花放電が起きて、二次コイル１１２に二次電流Ｉ２が流れるようになる。例えば、点火信号Ｓｉがオフになった点火タイミングと同時に重畳信号Ｓｐをオンにして、重畳動作を開始する。なお、重畳動作の開始タイミングは、点火プラグ２に火花放電を起こした点火タイミング以降であれば良く、点火タイミングから若干の猶予期間を空けて、重畳動作を開始するようにしても良い。 By turning on and off the ignition signal Si, the main primary coil 111a is energized and cut off, a spark discharge occurs in the ignition plug 2 to which high voltage is applied, and a secondary current I2 flows through the secondary coil 112. Become. For example, the superimposition signal Sp is turned on at the same time as the ignition timing when the ignition signal Si is turned off, and the superposition operation is started. Note that the start timing of the superimposing operation may be after the ignition timing at which spark discharge occurs in the spark plug 2, and the superimposing operation may be started after a slight grace period from the ignition timing.
重畳信号Ｓｐがオンになることで、重畳制御手段１５２より能動信号が重畳スイッチ素子１５３のゲートに入力され、重畳スイッチ素子１５３がオンになり、副一次コイル１１１ｂに副一次コイル電流Ｉ１ｂが流れ始める。重畳動作が開始されることにより、副一次コイル電流Ｉ１ｂを流した副一次コイル１１１ｂから二次側に放電エネルギーが与えられるので、減少していた二次電流Ｉ２が増加し、点火プラグ２内の火花放電を好適に持続させることができる。 When the superposition signal Sp turns on, an active signal is input from the superposition control means 152 to the gate of the superposition switch element 153, the superposition switch element 153 is turned on, and the sub-primary coil current I1b starts to flow through the sub-primary coil 111b. . By starting the superimposition operation, discharge energy is given to the secondary side from the auxiliary primary coil 111b through which the auxiliary primary coil current I1b flows, so the secondary current I2, which had been decreasing, increases, and the current in the spark plug 2 increases. Spark discharge can be suitably sustained.
副一次コイル通電手段１５による重畳制御が適正であれば、主一次コイル１１１ａから二次コイル１１２への放電エネルギー減少を補うように副一次コイル電流Ｉ１ｂが増加してゆき、判定開始猶予期間Ｔｍが経過する前に下限閾値ＴＨ－ｂを上回る。判定開始猶予期間Ｔｍが経過したタイミングで判定期間検出手段１６２が判定期間検出信号をＯＮにすると（例えば、信号電位をＨレベルからＬレベルにすると）、重畳制御状態判定手段１６１による判定動作が開始される。その後、重畳信号ＳｐがＯＦＦになったタイミングで、判定期間検出手段１６２が判定期間検出信号をＯＦＦにすると（例えば、信号電位をＬレベルからＨレベルに戻すと）、重畳制御状態判定手段１６１による判定動作が終了する。 If the superimposition control by the sub-primary coil energizing means 15 is appropriate, the sub-primary coil current I1b will increase to compensate for the decrease in discharge energy from the main primary coil 111a to the secondary coil 112, and the judgment start grace period Tm will increase. The lower limit threshold TH-b is exceeded before the time elapses. When the determination period detection means 162 turns on the determination period detection signal at the timing when the determination start grace period Tm has elapsed (for example, when the signal potential changes from the H level to the L level), the determination operation by the superimposition control state determination means 161 starts. be done. Thereafter, when the determination period detection means 162 turns off the determination period detection signal at the timing when the superimposition signal Sp turns OFF (for example, when the signal potential is returned from the L level to the H level), the superposition control state determination means 161 The determination operation ends.
判定期間検出手段１６２によって検出された判定期間Ｔｊの間、重畳制御状態判定手段１６１は、Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖより下がることはないか、Ｖｓ１検出値が上限閾値電圧ＴＨ－ｔｖを超えることはないかをモニタする。すなわち、判定期間Ｔｊの間、Ｖｓ１検出値が上限閾値電圧ＴＨ－ｔｖと下限閾値電圧ＴＨ－ｂｖの範囲内にあれば、重畳制御状態判定手段１６１は、副一次コイル電流Ｉ１ｂが上限閾値ＴＨ－ｔと下限閾値ＴＨ－ｂの範囲内にある適正状態と判定するのである。重畳制御状態判定手段１６１が適正状態と判定した場合、重畳制御状態判定信号はＯＦＦのままであるから、異常状態報知手段１６３によって異常状態報知信号が出力されることはないので、重畳信号ＳｐがＯＦＦになった後、重畳信号線Ｌ２の電位はＬを維持する。 During the determination period Tj detected by the determination period detection means 162, the superimposition control state determination means 161 determines whether the Vs1 detected value does not fall below the lower limit threshold voltage TH-bv or whether the Vs1 detected value reaches the upper threshold voltage TH-tv. Monitor to see if it exceeds the limit. That is, during the determination period Tj, if the detected value of Vs1 is within the range of the upper limit threshold voltage TH-tv and the lower limit threshold voltage TH-bv, the superimposition control state determining means 161 determines that the sub-primary coil current I1b is within the upper limit threshold voltage TH-bv. It is determined that the proper state is within the range between t and the lower limit threshold TH-b. When the superimposition control state determination means 161 determines that the state is appropriate, the superposition control state determination signal remains OFF, so the abnormal state notification means 163 does not output an abnormal state notification signal, so that the superposition signal Sp is After turning off, the potential of the superimposed signal line L2 maintains L.
一方、判定期間Ｔｊの間、Ｖｓ１検出値が下限閾値電圧ＴＨ－ｂｖ以上を保持できていない場合、重畳制御状態判定手段１６１は、副一次コイル電流Ｉ１ｂが下限閾値ＴＨ－ｂを下回る不足異常状態と判定する。重畳制御状態判定手段１６１が不足異常状態と判定した場合、所定時間幅ｔ１のパルスを重畳制御状態判定信号として異常状態報知手段１６３に出力し、これを受けた異常状態報知手段１６３は、所定時間幅ｔ１のパルスを異常状態報知信号として出力する。 On the other hand, if the detected value of Vs1 is not maintained at the lower limit threshold voltage TH-bv or higher during the determination period Tj, the superimposed control state determination means 161 determines that the sub-primary coil current I1b is in an insufficient abnormal state where it is below the lower limit threshold voltage TH-b. It is determined that When the superimposition control state determination means 161 determines that there is an insufficient abnormal state, it outputs a pulse with a predetermined time width t1 as a superposition control state determination signal to the abnormal state notification means 163, and upon receiving this, the abnormal state notification means 163 A pulse with a width t1 is output as an abnormal state notification signal.
よって、重畳制御の終了時に重畳信号ＳｐがＯＦＦになることで重畳信号線Ｌ２の電位はＬレベルとなるが、ほぼ同時に異常状態報知信号によって重畳信号線Ｌ２の電位はＨに変わるので、その後も所定時間幅ｔ１が経過するまで、重畳信号線Ｌ２の電位はＨレベルを維持する。これにより、内燃機関駆動制御装置３は、所定時間幅ｔ１の異常状態報知信号（不足異常状態を報知する信号）を受信する。なお、異常状態報知手段１６３により出力される異常状態報知信号のＯＮ電位Ｖ１は、重畳信号ＳｐのＯＮ電位と同じに設定してもよいし、重畳信号Ｓｐと異なるＯＮ電位にして、異常状態報知信号を重畳信号Ｓｐと識別し易いようにしてもよい。 Therefore, when the superimposition signal Sp turns OFF at the end of the superimposition control, the potential of the superimposition signal line L2 becomes L level, but almost at the same time, the potential of the superposition signal line L2 changes to H level due to the abnormal state notification signal, so the potential of the superposition signal line L2 changes to H level after that. The potential of the superimposed signal line L2 remains at the H level until the predetermined time width t1 has elapsed. Thereby, the internal combustion engine drive control device 3 receives the abnormal state notification signal (signal notifying the insufficient abnormal state) of the predetermined time width t1. Note that the ON potential V1 of the abnormal state notification signal outputted by the abnormal state notification means 163 may be set to be the same as the ON potential of the superimposed signal Sp, or may be set to a different ON potential from the superimposed signal Sp to notify the abnormal state. The signal may be made easily distinguishable from the superimposed signal Sp.
また、判定期間Ｔｊの間に、一瞬でもＶｓ１検出値が上限閾値電圧ＴＨ－ｔｖを超えている場合、重畳制御状態判定手段１６１は、副一次コイル電流Ｉ１ｂが上限閾値ＴＨ－ｔを上回る過剰異常状態と判定する。重畳制御状態判定手段１６１が過剰異常状態と判定した場合、所定時間幅ｔ２のパルスを重畳制御状態判定信号として異常状態報知手段１６３に出力し、これを受けた異常状態報知手段１６３は、所定時間幅ｔ２のパルスを異常状態報知信号として出力する。 In addition, if the detected value of Vs1 exceeds the upper limit threshold voltage TH-tv even momentarily during the determination period Tj, the superimposed control state determination means 161 determines that the sub-primary coil current I1b exceeds the upper limit threshold voltage TH-t due to an excessive abnormality. It is determined that the condition is When the superimposition control state determining means 161 determines that there is an excessive abnormal state, it outputs a pulse with a predetermined time width t2 as a superimposition control state determination signal to the abnormal state notification means 163, and upon receiving this, the abnormal state notification means 163 outputs a pulse with a predetermined time width t2. A pulse with a width t2 is output as an abnormal state notification signal.
よって、重畳制御の終了時に重畳信号ＳｐがＯＦＦになることで重畳信号線Ｌ２の電位はＬレベルとなるが、ほぼ同時に異常状態報知信号によって重畳信号線Ｌ２の電位はＨに変わるので、その後も所定時間幅ｔ２が経過するまで、重畳信号線Ｌ２の電位はＨレベルを維持する。これにより、内燃機関駆動制御装置３は、所定時間幅ｔ２の異常状態報知信号（過剰異常状態を報知する信号）を受信できる。 Therefore, when the superimposition signal Sp turns OFF at the end of the superimposition control, the potential of the superimposition signal line L2 becomes L level, but almost at the same time, the potential of the superposition signal line L2 changes to H level due to the abnormal state notification signal, so the potential of the superposition signal line L2 changes to H level after that. The potential of the superimposed signal line L2 remains at the H level until the predetermined time width t2 has elapsed. Thereby, the internal combustion engine drive control device 3 can receive the abnormal state notification signal (signal notifying an excessive abnormal state) of the predetermined time width t2.
なお、異常状態報知手段１６３により出力される異常状態報知信号の時間幅を変えることで、不足異常状態を報知する異常状態報知信号と過剰異常状態を報知する異常状態報知信号を内燃機関駆動制御装置３が識別できるようにしたが、パルス幅を用いた識別手法に限定されない。例えば、重畳制御状態判定手段１６１が過剰異常状態と判定した場合、不足異常状態の判定結果を報せる重畳制御状態判定信号の信号電位Ｖ１よりも高い信号電位Ｖ２の重畳制御状態判定信号を異常状態報知手段１６３に出力し、過剰異常状態の判定結果を報せる。これを受けた異常状態報知手段１６３は、不足異常状態の発生を報せる異常状態報知信号の信号電位Ｖ１よりも高い信号電位Ｖ２の異常状態報知信号を重畳信号線Ｌ２に出力する。よって、重畳制御の終了時に重畳信号ＳｐがＯＦＦになると同時に異常状態報知信号により重畳信号線Ｌ２の電位はＶ２に変わることとなり、内燃機関駆動制御装置３は、信号電位Ｖ２の異常状態報知信号（過剰異常状態を報知する信号）を受信できる。なお、異常状態報知信号の信号電位によって、不足異常状態と過剰異常状態を識別可能に報知する場合、異常状態報知信号のパルス幅ｔ１とｔ２は同じにしてもよいし、異なる時間幅にしてもよい。 Note that by changing the time width of the abnormal state notification signal output by the abnormal state notification means 163, the abnormal state notification signal for reporting an insufficient abnormal state and the abnormal state notification signal for reporting an excessive abnormal state can be controlled by the internal combustion engine drive control device. 3 can be identified, but the identification method is not limited to using pulse width. For example, when the superimposition control state determination means 161 determines that the abnormal state is excessive, the superposition control state determination signal with a signal potential V2 higher than the signal potential V1 of the superimposition control state determination signal that reports the determination result of the insufficient abnormal state is set to the abnormal state. It is output to the notification means 163 to report the determination result of the excessive abnormal state. Upon receiving this, the abnormal state notification means 163 outputs, to the superimposed signal line L2, an abnormal state notification signal having a signal potential V2 higher than the signal potential V1 of the abnormal state notification signal that reports the occurrence of an insufficient abnormal state. Therefore, at the end of the superimposition control, the potential of the superimposed signal line L2 changes to V2 due to the abnormal state notification signal at the same time as the superimposed signal Sp turns OFF, and the internal combustion engine drive control device 3 receives the abnormal state notification signal (of the signal potential V2). (signal notifying excessive abnormal conditions) can be received. In addition, when an insufficient abnormal state and an excessive abnormal state are notified in a distinguishable manner by the signal potential of the abnormal state notification signal, the pulse widths t1 and t2 of the abnormal state notification signal may be the same or may be set to different time widths. good.
以上、本発明に係る内燃機関用点火装置の実施形態を添付図面に基づいて説明したが、本発明は、この実施形態のみに限定されるものではなく、特許請求の範囲に記載の構成を変更しない範囲で、公知既存の等価な技術手段を転用することにより実施しても構わない。 Although the embodiment of the ignition device for an internal combustion engine according to the present invention has been described above based on the attached drawings, the present invention is not limited to this embodiment only, and the configuration described in the claims can be changed. To the extent that it is not necessary, it may be implemented by diverting known and existing equivalent technical means.
１ 内燃機関用点火装置
１０ 点火コイルユニット
１１ 点火コイル
１１１ａ 主一次コイル
１１１ｂ 副一次コイル
１１２ 二次コイル
１３ 主一次コイル通電手段
１５ 副一次コイル通電手段
１６ 重畳制御状態監視手段
２ 点火プラグ
３ 内燃機関駆動制御装置
1 Ignition device for internal combustion engine 10 Ignition coil unit 11 Ignition coil 111a Main primary coil 111b Sub primary coil 112 Secondary coil 13 Main primary coil energizing means 15 Sub primary coil energizing means 16 Superimposition control state monitoring means 2 Spark plug 3 Internal combustion engine drive Control device
Claims (4)
前記点火コイルは、前記点火信号がオンで行われる主一次電流の通電により順方向の磁束量が増加し、前記点火信号がオフになって前記主一次電流が遮断されることにより前記順方向の磁束量が減少する主一次コイルと、該主一次コイルに対する前記主一次電流の遮断タイミング以降の放電期間内に副一次コイル電流を流すことにより、前記順方向と逆の遮断方向に磁束を発生させる副一次コイルと、一端側が前記点火プラグと接続され、前記主一次コイルと前記副一次コイルの磁束変化が作用して前記放電エネルギーが与えられる二次コイルと、を有し、
前記点火信号に基づいて、前記主一次コイルへの前記主一次電流の通電および遮断を行う主一次コイル通電手段と、
前記主一次コイルの通電遮断タイミング以降に前記点火制御手段より出力される重畳信号に基づいて、前記副一次コイルへの前記副一次コイル電流の通電および遮断を行う副一次コイル通電手段と、
前記副一次コイルへの前記副一次コイル電流の通電による重畳制御が正常に行われているか否かを判定し、前記重畳制御が正常でないと判定した場合には、前記重畳制御の異常を報知する重畳制御状態監視手段と、
を備え、
前記重畳制御状態監視手段は、
前記副一次コイル電流が予め定めた上限閾値と下限閾値との間である適正範囲内にあることに基づいて、前記重畳制御が正常状態であると判定し、前記副一次コイル電流が前記適正範囲を外れることに基づいて、前記重畳制御が異常状態であると判定する重畳制御状態判定手段と、
前記重畳制御状態判定手段が前記重畳制御の異常状態を判定することに基づいて、前記重畳制御の異常状態発生を報知する異常状態報知手段と、
を備え、
前記異常状態報知手段は、前記点火制御手段から前記重畳信号が送信される重畳信号線を介して異常状態発生信号を送信することで、前記重畳制御の異常状態発生を前記点火制御手段へ報知するようにした、
ことを特徴とする内燃機関用点火装置。 In an ignition device for an internal combustion engine, which controls energization of an ignition coil by turning on and off an ignition signal from an ignition control means, thereby giving discharge energy to the secondary side of the ignition coil and causing spark discharge to an ignition plug. ,
In the ignition coil, the amount of forward magnetic flux increases when the ignition signal is turned on and the main primary current is energized, and when the ignition signal is turned off and the main primary current is cut off, the forward direction magnetic flux increases. A magnetic flux is generated in the blocking direction opposite to the forward direction by flowing a sub-primary coil current during a discharge period after the timing of cutting off the main primary current to the main primary coil where the amount of magnetic flux decreases. comprising a sub-primary coil and a secondary coil whose one end side is connected to the ignition plug and to which the discharge energy is applied due to the magnetic flux changes of the main primary coil and the sub-primary coil;
Main primary coil energizing means for energizing and cutting off the main primary current to the main primary coil based on the ignition signal;
A sub-primary coil energizing means that energizes and interrupts the auxiliary primary coil current to the auxiliary primary coil based on a superimposed signal output from the ignition control means after the energization cutoff timing of the main primary coil;
Determining whether superimposition control by energizing the sub-primary coil current to the sub-primary coil is being performed normally, and if it is determined that the superimposition control is not normal, notifying an abnormality of the superimposition control. Superimposed control state monitoring means;
Equipped with
The superimposed control state monitoring means includes:
Based on the fact that the sub-primary coil current is within an appropriate range between a predetermined upper and lower threshold, it is determined that the superimposition control is in a normal state, and the sub-primary coil current is within the appropriate range. superimposition control state determination means for determining that the superposition control is in an abnormal state based on the fact that the superposition control is out of the normal state;
Abnormal state reporting means for notifying the occurrence of an abnormal state of the superimposed control based on the superimposed control state determining means determining the abnormal state of the superimposed control;
Equipped with
The abnormal state notification means notifies the ignition control means of the occurrence of an abnormal state in the superimposition control by transmitting an abnormal state occurrence signal via a superimposition signal line through which the superposition signal is transmitted from the ignition control means. I did it like this,
An ignition device for an internal combustion engine characterized by:
前記重畳制御状態判定手段は、前記判定期間検出手段が検出した判定期間のみ、前記重畳制御の状態判定を行うことを特徴とする請求項１～請求項３の何れか１項に記載の内燃機関用点火装置。 When the superimposition control is in a normal state, the sub-primary coil current that starts flowing to the sub-primary coil due to the operation of the sub-primary coil energizing means is set in advance as a necessary and sufficient elapsed time until it reaches the lower limit threshold. determination period detection means for detecting a determination period during which the superimposition control state determination means determines the state of the superposition control, with the elapse of the determination start grace period determined as the determination start timing;
The internal combustion engine according to any one of claims 1 to 3 , wherein the superimposed control state determination means determines the state of the superimposed control only during the determination period detected by the determination period detection means. ignition device .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020054024A JP7408453B2 (en) | 2020-03-25 | 2020-03-25 | Ignition system for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020054024A JP7408453B2 (en) | 2020-03-25 | 2020-03-25 | Ignition system for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2021156171A JP2021156171A (en) | 2021-10-07 |
| JP7408453B2 true JP7408453B2 (en) | 2024-01-05 |
Family
ID=77919618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2020054024A Active JP7408453B2 (en) | 2020-03-25 | 2020-03-25 | Ignition system for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP7408453B2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015200251A (en) | 2014-04-10 | 2015-11-12 | 株式会社デンソー | Ignitor |
| WO2016157541A1 (en) | 2015-03-30 | 2016-10-06 | 日立オートモティブシステムズ阪神株式会社 | Ignition device for internal combustion engine |
| WO2019198119A1 (en) | 2018-04-09 | 2019-10-17 | 日立オートモティブシステムズ阪神株式会社 | Ignition device for internal combustion engine |
| JP2019183846A (en) | 2019-04-11 | 2019-10-24 | 三菱電機株式会社 | Ignition apparatus |
| JP2019218888A (en) | 2018-06-19 | 2019-12-26 | 株式会社デンソー | Ignition control system of internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6245973A (en) * | 1985-08-23 | 1987-02-27 | Nippon Denso Co Ltd | Ignitor for internal combustion engine |
-
2020
- 2020-03-25 JP JP2020054024A patent/JP7408453B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015200251A (en) | 2014-04-10 | 2015-11-12 | 株式会社デンソー | Ignitor |
| WO2016157541A1 (en) | 2015-03-30 | 2016-10-06 | 日立オートモティブシステムズ阪神株式会社 | Ignition device for internal combustion engine |
| WO2019198119A1 (en) | 2018-04-09 | 2019-10-17 | 日立オートモティブシステムズ阪神株式会社 | Ignition device for internal combustion engine |
| JP2019218888A (en) | 2018-06-19 | 2019-12-26 | 株式会社デンソー | Ignition control system of internal combustion engine |
| JP2019183846A (en) | 2019-04-11 | 2019-10-24 | 三菱電機株式会社 | Ignition apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021156171A (en) | 2021-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016157541A1 (en) | Ignition device for internal combustion engine | |
| US10371117B2 (en) | Ignition apparatus for internal combustion engine | |
| JP6570737B2 (en) | Ignition device for internal combustion engine | |
| JP7012830B2 (en) | Ignition system for internal combustion engine | |
| JP6992198B2 (en) | Ignition system for internal combustion engine | |
| JP6847258B2 (en) | Ignition system for internal combustion engine and control device for internal combustion engine | |
| JP7408453B2 (en) | Ignition system for internal combustion engines | |
| JP5253144B2 (en) | Ignition device for internal combustion engine | |
| JP6095819B1 (en) | High frequency discharge ignition device | |
| JP6536155B2 (en) | Ignition system for internal combustion engine | |
| US9957944B2 (en) | Ignition apparatus for internal combustion engine | |
| WO2015156391A1 (en) | Ignition device for internal combustion engine | |
| JPH05164028A (en) | Overlapped discharge type ignition device for internal combustion engine | |
| JPWO2019130462A1 (en) | Ignition system for internal combustion engine | |
| WO2018229883A1 (en) | Internal combustion engine ignition device | |
| US9546637B2 (en) | Ignition apparatus | |
| JP4440490B2 (en) | Ignition device for internal combustion engine | |
| JP6264166B2 (en) | Ignition device failure diagnosis device and ignition device failure diagnosis method | |
| JP6381008B2 (en) | Ignition device for internal combustion engine | |
| WO2020179016A1 (en) | Ignition device for internal combustion engine | |
| JP6398272B2 (en) | Ignition device | |
| WO2019211885A1 (en) | Ignition device for internal combustion engines | |
| CN113167205B (en) | Ignition device | |
| WO2021064851A1 (en) | Internal combustion engine ignition device | |
| WO2019225018A1 (en) | Ignition device for internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20221226 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20230830 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230905 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20231101 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20231205 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20231220 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 7408453 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |