JP2017145765A5

JP2017145765A5 -

Info

Publication number: JP2017145765A5
Application number: JP2016028248A
Authority: JP
Filing date: 2016-02-17
Publication date: 2018-02-01
Anticipated expiration: 2036-02-17

Description

また、本発明の第２の態様は、点火コイル（１０）の二次巻線（１２）に接続した点火プラグ(１３)を点火するための点火装置であって、
上記点火コイルの一次巻線（１１）に接続される点火用スイッチング素子（２）と、
該点火用スイッチング素子の制御端子（２１）に接続したコンデンサ（３）と、
該コンデンサに並列接続したプリドライブ用スイッチング素子（５）と、
上記制御端子と上記コンデンサとの間に電気接続し、該コンデンサを一定の電流で充電するオン用定電流回路（４_ON）と、
上記制御端子と上記コンデンサとの間に電気接続し、該コンデンサに蓄えられた電荷を一定の電流で放電するオフ用定電流回路と、を備える点火装置にある。 A second aspect of the present invention is an ignition device for igniting a spark plug (13) connected to a secondary winding (12) of an ignition coil (10),
An ignition switching element (2) connected to the primary winding (11) of the ignition coil;
A capacitor (3) connected to the control terminal (21) of the ignition switching element;
A pre-drive switching element (5) connected in parallel to the capacitor;
An on-current constant circuit (4 _ON ) electrically connected between the control terminal and the capacitor and charging the capacitor with a constant current;
An ignition device comprising: an off constant current circuit that is electrically connected between the control terminal and the capacitor and discharges the electric charge stored in the capacitor with a constant current .

実施形態１における、点火用スイッチング素子をオフしている状態での、点火装置の回路図。The circuit diagram of an ignition device in the state where the switching element for ignition in Embodiment 1 is turned off. 実施形態１における、一次巻線の通電動作を行う際の、点火装置の回路図。FIG. 3 is a circuit diagram of the ignition device when conducting the energization operation of the primary winding in the first embodiment. 実施形態１における、点火動作を行う際の、点火装置の回路図。FIG. 2 is a circuit diagram of an ignition device when performing an ignition operation in the first embodiment. 実施形態１における、ソフトオフ動作を行う際の、点火装置の回路図。FIG. 3 is a circuit diagram of an ignition device when performing a soft-off operation in the first embodiment. 実施形態１における、点火動作を繰り返す際の、点火装置のタイムチャート。The time chart of an ignition device at the time of repeating ignition operation in Embodiment 1. FIG. 実施形態１における、一定期間、点火指令が入力されなかったときの、点火装置のタイムチャート。2 is a time chart of the ignition device when an ignition command is not input for a certain period in the first embodiment. 実施形態１における、オフ用定電流回路を用いてソフトオフ動作を行ったときの、ゲート電圧、一次電流、二次電圧の波形図に、ＲＣ回路を用いてソフトオフ動作を行ったときの波形図を重ねて描いたもの。The waveforms when the soft-off operation is performed using the RC circuit in the waveform diagram of the gate voltage, the primary current, and the secondary voltage when the soft-off operation is performed using the constant current circuit for off in Embodiment 1. This is a drawing of overlapping figures. 実施形態１における、点火装置の断面図。FIG. 2 is a cross-sectional view of the ignition device in the first embodiment. 実施形態２における、点火装置の回路図。The circuit diagram of the ignition device in Embodiment 2. FIG. 実施形態２における、ソフトオン動作を行う際の、点火装置の回路図。The circuit diagram of an ignition device at the time of performing soft-on operation in Embodiment 2. 実施形態２における、点火動作を行う際の、点火装置の回路図。The circuit diagram of an ignition device at the time of performing ignition operation in Embodiment 2. 実施形態２における、ソフトオフ動作を行う際の、点火装置の回路図。FIG. 4 is a circuit diagram of an ignition device when performing a soft-off operation in the second embodiment. 実施形態２における、オン用定電流回路を用いてソフトオン動作を行ったときの、ゲート電圧、一次電流、二次電圧の波形図に、ＲＣ回路を用いてソフトオン動作を行ったときの波形図を重ねて描いたもの。The waveform of the gate voltage, the primary current, and the secondary voltage when the soft-on operation is performed using the constant current circuit for turning on in Embodiment 2, and the waveform when the soft-on operation is performed using the RC circuit This is a drawing of overlapping figures. 実施形態２における、ゲート電圧の上昇速度のばらつきと、点火用スイッチング素子の閾電圧のばらつきとを表したグラフ。The graph showing the variation in the rise speed of the gate voltage and the variation in the threshold voltage of the ignition switching element in the second embodiment. 参考形態１における、点火装置の回路図。The circuit diagram of the ignition device in the reference form 1 . 比較形態における、点火装置の回路図。The circuit diagram of the ignition device in a comparison form. 比較形態における、ゲート電圧の上昇速度のばらつきと、点火用スイッチング素子の閾電圧のばらつきとを表したグラフ。The graph showing the variation in the rising speed of the gate voltage and the variation in the threshold voltage of the ignition switching element in the comparative embodiment.

（参考形態１）
本形態は、点火装置１の回路構成を変更した例である。図１５に示すごとく、本形態の点火装置１は、点火コイル１０の一次巻線１１に接続した点火用スイッチング素子２と、コンデンサ３と、プリドライブ用スイッチング素子５と、オン用定電流回路４_ONとを備える。本形態では、オフ用定電流回路４_OFFを設けていない。 ( Reference form 1 )
In this embodiment, the circuit configuration of the ignition device 1 is changed. As shown in FIG. 15, the ignition device 1 of the present embodiment includes an ignition switching element 2 connected to the primary winding 11 of the ignition coil 10, a capacitor 3, a predrive switching element 5, and an ON constant current circuit 4. _{With ON} . In this embodiment, the off constant current circuit 4 _OFF is not provided.

Claims

An ignition device (1) for igniting a spark plug (13) connected to a secondary winding (12) of an ignition coil (10),
An ignition switching element (2) connected to the primary winding (11) of the ignition coil;
A capacitor (3) connected to the control terminal (21) of the ignition switching element;
A pre-drive switching element (5) connected in parallel to the capacitor;
A pull-up resistor (19) connected between the control terminal and the capacitor and between a current source (14);
An ignition device comprising: an off constant current circuit (4 _OFF ) that is electrically connected between the control terminal and the capacitor and discharges the electric charge stored in the capacitor with a constant current.

An ignition device for igniting a spark plug (13) connected to a secondary winding (12) of an ignition coil (10),
An ignition switching element (2) connected to the primary winding (11) of the ignition coil;
A capacitor (3) connected to the control terminal (21) of the ignition switching element;
A pre-drive switching element (5) connected in parallel to the capacitor;
An on-current constant circuit (4 _ON ) electrically connected between the control terminal and the capacitor and charging the capacitor with a constant current;
An ignition device comprising: an off constant current circuit that is electrically connected between the control terminal and the capacitor and discharges the electric charge stored in the capacitor with a constant current .

The on-state constant current circuit and the off-state constant current circuit each include a switching transistor (40) for switching between energization and de-energization, and the control terminals of these two switching transistors are common. 3. The ignition device according to claim 2, wherein the two switching transistors are of a complementary type in which when one is turned on, the other is turned off.