WO2013099439A1 - グロープラグ駆動制御装置 - Google Patents
グロープラグ駆動制御装置 Download PDFInfo
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- WO2013099439A1 WO2013099439A1 PCT/JP2012/078569 JP2012078569W WO2013099439A1 WO 2013099439 A1 WO2013099439 A1 WO 2013099439A1 JP 2012078569 W JP2012078569 W JP 2012078569W WO 2013099439 A1 WO2013099439 A1 WO 2013099439A1
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- glow plug
- glow
- switch
- control unit
- control device
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/026—Glow plug actuation during engine operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0236—Industrial applications for vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
- F02P19/022—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls using intermittent current supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
- F02P19/023—Individual control of the glow plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/001—Glowing plugs for internal-combustion engines
Definitions
- the present invention relates to a glow plug drive control method and apparatus mainly used for assisting in starting a diesel engine, and more particularly to a method for reducing current fluctuation and the like.
- pulse width modulation As a method for energizing a glow plug used to assist in starting a diesel engine for a vehicle, pulse width modulation (PWM) has advantages such as low loss loss during voltage control and flexible voltage setting based on effective voltage. ) Is generally used, and various drive control methods and devices based on such pulse width modulation have been proposed and put into practical use (see, for example, Patent Document 1).
- the present invention has been made in view of the above circumstances, and provides a glow plug drive control device capable of suppressing the current fluctuation at the start of driving and extending the life by reducing the electrical stress caused by the current fluctuation. To do.
- a glow switch and a glow plug are provided in series between a power source and a ground, and an electronic control unit for controlling opening and closing of the glow switch is provided, and the glow plug is provided.
- a glow plug drive control device that enables energization drive of In accordance with the control by the electronic control unit, a current stabilizing element is connected in series to the series connection path of the glow switch and the glow plug when the glow plug is energized.
- a glow plug drive control device provided with a passage switching switch for returning the glow switch and the glow plug to a serial connection state.
- the current stabilizing element when the energization of the glow plug is started, the current stabilizing element is inserted in series into the energization path of the glow plug, and after the energization is started, the current is supplied from the energization path of the glow plug under a certain condition. Since the stabilization element is excluded, the current that flows to the glow plug is smoothed when starting energization driving, and unlike the conventional case, it is prevented that a large current flows instantaneously when starting driving. In addition to reliably reducing the electrical stress on the glow plug and extending the service life, it is possible to reduce power loss and contribute to power saving of the apparatus.
- FIG. 1A is a circuit diagram illustrating a first circuit configuration example of a glow plug drive control device according to an embodiment of the present invention, in which FIG. 1A is a circuit diagram before the start of glow plug drive, and FIG. It is a circuit diagram at the time of channel
- 4 is a subroutine flowchart showing a procedure of glow plug drive control processing executed by an electronic control unit constituting the glow plug drive control device shown in FIG. 1.
- FIG. 3 is a waveform diagram showing a current change when the glow plug is driven by the glow plug drive control device shown in FIG. 1, and FIG. 3A is a waveform diagram schematically showing a current change of the glow plug immediately after the drive is started.
- FIG. 1A is a circuit diagram before the start of glow plug drive
- FIG. It is a circuit diagram at the time of channel
- 4 is a subroutine flowchart showing a procedure of glow plug drive control processing
- FIG. 4A is a circuit diagram illustrating a second configuration example of a glow plug drive control device according to an embodiment of the present invention, in which FIG. 4A is a circuit diagram before driving of the glow plug, and FIG. 4B is a glow plug. It is a circuit diagram when passage switching is performed after the start of driving.
- the glow plug drive control device S includes an electronic control unit (indicated as “ECU” in FIG. 1) 101, a glow switch (indicated as “Glow S / W” in FIG. 1) 2,
- the stabilization coil 3 as a current stabilization element and the path switching switch 5 are configured as main components.
- the electronic control unit 101 includes, for example, a microcomputer (not shown) having a known and well-known configuration, a storage element (not shown) such as a RAM and a ROM, and an external circuit. It has an input / output interface circuit (not shown) for transmitting and receiving signals, and executes glow plug drive control processing, which will be described later, along with vehicle engine control, fuel injection control, and the like. It has become a thing.
- the electronic control unit 101 generates and outputs a so-called PWM (Pulse Width Modulation) signal as a glow control signal for turning on / off the glow plug 1.
- PWM Pulse Width Modulation
- the glow switch 2 is turned on / off by the above-described control signal (PWM signal) output from the electronic control unit 101. More specifically, for example, the glow switch 2 mainly includes a semiconductor element such as a field effect transistor. It is comprised as an element, The structure is the same as that of the former.
- the glow switch 2 is configured such that one of the terminals to be opened and closed (for example, the drain of the field effect transistor) is connected to a vehicle battery (not shown) so that the battery voltage VB is applied to the terminal.
- the other for example, the source of the field effect transistor
- the other end of the stabilization coil 3 is connected to a second contact 5b of the path switching switch 5 described below.
- the connection point between the glow switch 2 and one end of the stabilization coil 3 is connected to the third contact 5 c of the path switching switch 5.
- the path switching switch 5 is a single-circuit two-contact single-pole bipolar switch having first to third contacts 5a to 5c, and the first contact 5a is changed to the second by a switching control signal from the electronic control unit 101.
- the contact 5b and the third contact 5c are selectively switched and connected.
- the path switching switch 5 includes a semiconductor element such as a field effect transistor as a main component.
- the first contact point 5a and the second contact point 5b are in the connected state in the path switching switch 5 according to the embodiment of the present invention.
- a predetermined switching control signal is applied from the electronic control unit 101, the first contact 5a and the third contact 5c are connected.
- a glow plug (indicated as “G / P” in FIG. 1) 1 is connected in series between the first contact 5a and the ground (see FIG. 1). (See FIG. 1A).
- an electronic control unit 101 and an ignition switch (indicated as “Key S / W” in FIG. 1) 4 are serially connected in series from the vehicle battery side between a vehicle battery (not shown) and the ground.
- the battery voltage VB is applied to the electronic control unit 101 when the ignition switch 4 is turned on (closed state).
- glow plug drive control processing executed by the electronic control unit 101 in this configuration will be described with reference to a subroutine flowchart shown in FIG.
- processing is started by the electronic control unit 101, it is first determined whether or not the ignition switch 4 is turned on (see step S202 in FIG. 2).
- step S202 When it is determined in step S202 that the ignition switch 4 is turned on (in the case of YES), the process proceeds to the process of step S204 described below as the start of driving (energization start) of the glow plug 1, while the ignition switch 4 When it is determined that 4 is not turned on (in the case of NO), a series of processing is terminated assuming that the glow plug 1 is not being driven, and the process once returns to a main routine (not shown).
- step S204 the glow switch 2 is connected to the glow plug 1 via the stabilization coil 3, and the glow plug 1 is energized in response to the PWM control signal. That is, in the embodiment of the present invention, as described above, the path switching switch 5 is connected to the first contact 5a and the second contact 5b in the normal state. Therefore, in step S204 when the energization of the glow plug 1 is started, the switching control signal is not output from the electronic control unit 101 to the energization switching switch 5, and the connection between the first contact 5a and the second contact 5b is performed. The state is maintained, and the glow switch 2, the stabilization coil 3, the passage switching switch 5, and the glow plug 1 are connected in series between the vehicle battery (not shown) and the ground (see FIG. 1 (A)).
- the electronic control unit 101 outputs a PWM control signal to the glow switch 2 as in the prior art, so that the battery voltage VB becomes the glow switch 2, the stabilization coil 3, and the path switching switch. 5 is applied to the glow plug 1 through 5 and energization according to the PWM control signal is performed. Therefore, a large current instantaneously flows through the glow plug 1 immediately after the start of energization of the glow plug 1 due to the action of the stabilization coil 3, as schematically shown in FIG. However, a substantially smoothed current flows. Next, the process proceeds to step S206, and it is determined whether or not the drive transition condition is satisfied.
- Specific drive transition conditions include, for example, a predetermined elapsed time from the start of energization. That is, it is determined whether or not a predetermined time has elapsed since the start of energization. When it is determined that the time has elapsed, the battery voltage is supplied to the glow plug 1 without passing through the stabilization coil 3 as the drive transition condition is satisfied. It is preferable to apply energization driving by applying VB.
- the predetermined elapsed time is changed depending on, for example, the driving state of an engine (not shown). More specifically, for example, using engine cooling water temperature as a parameter representing the engine driving state, the relationship between various engine cooling water temperatures and a suitable predetermined elapsed time for each engine cooling water temperature can be obtained from tests and simulation results. Based on this, this is so-called mapped and stored in an appropriate storage area of the electronic control unit 101. Then, the predetermined elapsed time corresponding to the engine coolant temperature at the time of execution of step S206 may be read from the above-described map, and the necessity of drive shift may be determined using an appropriate predetermined elapsed time.
- the drive transition condition is not limited to this, and it is desirable to select a suitable one according to various specific conditions of the vehicle.
- the driving transition condition for example, cumulative energy that is energy spent driving from the start of energization of the glow plug 1 is used, and whether or not the driving transition condition is satisfied is determined based on whether or not this exceeds a predetermined value.
- Vg is an effective value (RMS).
- the accumulated energy can also be expressed as an integral value when the applied voltage to the glow plug 1 is Vg and the energization current of the glow plug 1 is Ig.
- the integration time integration period is the time from the start of energization of the glow plug 1 to the determination of the drive transition condition.
- the above-mentioned predetermined value for determining whether or not the accumulated energy exceeds a value that can satisfy the drive transition condition is appropriate based on the results of tests and simulations according to the differences in the conditions of each vehicle. It is preferable to set the value specifically.
- the detection of the energization current Ig is not necessarily limited to that directly detected by the glow switch 2, and a detection resistor is connected in series to the line through which the energization current Ig flows. The voltage drop may be input to the electronic control unit 101 and converted into a current to obtain the energization current Ig.
- step S206 If it is determined in step S206 that the drive transition condition is satisfied (YES), the process proceeds to step S208, and a switching control signal is output from the electronic control unit 101 to the path switching switch 5. Then, the first contact 5a and the third contact 5c are connected, and the stabilization coil 3 is opened. As a result, the battery voltage VB is applied to the glow plug 1 via the glow switch 2, the third contact 5c, and the first contact 5a. That is, in other words, the circuit connection is brought into a normal connection state, and the energization drive of the glow plug 1 is performed. Therefore, the current flowing through the glow plug 1 has a current waveform substantially similar to the PWM signal as schematically shown in FIG.
- FIG. 4 a stabilization coil 3 and a path switching switch 6 which are connected in parallel are provided in series between a glow switch 2 and a glow plug 1. It has become.
- the path switching switch 6 in this configuration example is a single-pole single-throw switch, that is, a switch with one contact for one circuit, and is composed mainly of, for example, a semiconductor element such as a field effect transistor.
- the opening / closing operation of the path switching switch 6 is controlled by the electronic control unit 101 as with the path switching switch 5.
- the path switching switch 6 in the embodiment of the present invention is in an open state in a normal state, that is, a state in which no control signal is applied from the outside (see FIG. 4A).
- a predetermined switching control signal is applied from the unit 101, the closed state is established.
- the glow plug drive control process executed by the electronic control unit 101 in such a configuration is basically the same as the process described above with reference to FIG. 2, and therefore the description thereof is omitted here. .
- the energization of the glow plug 1 is performed through the stabilization coil 3 only during a predetermined period of time when the energization of the glow plug 1 is started. Generation of a large current is suppressed, and unlike the conventional case, the electrical stress on the glow plug 1 is extremely low.
- a PWM signal is used as a glow control signal.
- the present invention is not necessarily limited to a PWM signal, and may be another type of signal. is there.
- the coil is used as the current stabilizing element, the current stabilizing element is not necessarily limited to the coil, and it is needless to say that other electronic components having equivalent characteristics may be used.
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Abstract
Description
前記電子制御ユニットによる制御に応じて、前記グロープラグの通電開始時に前記グロースイッチと前記グロープラグの直列接続路に電流安定化素子を直列接続せしめる一方、通電開始後、電源とグランドとの間に前記グロースイッチとグロープラグを直列接続状態に復帰せしめる通路切替用スイッチが設けられてなるグロープラグ駆動制御装置が提供される。
また、グロープラグの駆動開始時における瞬間的な大電流の発生が抑圧されるため、ノイズの発生が抑圧され、ノイズ発生に起因する周辺の電子回路の誤動作などの悪影響を低減、抑圧することができ、より信頼性の高い装置を提供することができる。
2…グロースイッチ
3…安定化用コイル
5…通路切替用スイッチ(第1の構成例)
6…通路切替用スイッチ(第2の構成例)
101…電子制御ユニット
なお、以下に説明する部材、配置等は本発明を限定するものではなく、本発明の趣旨の範囲内で種々改変することができるものである。
最初に、図1に示された本発明の実施の形態におけるグロープラグ駆動制御装置の第1の構成例について説明する。
本発明の実施の形態におけるグロープラグ駆動制御装置Sは、電子制御ユニット(図1においては「ECU」と表記)101と、グロースイッチ(図1においては「Glow S/W」と表記)2と、電流安定化素子としての安定化用コイル3と、通路切替用スイッチ5を主たる構成要素として構成されたものとなっている。
かかるグロースイッチ2は、開閉される端子の一方(例えば、電界効果トランジスタのドレイン)が図示されない車両用バッテリへ接続されて、バッテリ電圧VBが印加されるようになっている一方、開閉される端子の他方(例えば、電界効果トランジスタのソース)は、安定化用コイル3の一端に接続されたものとなっている。
また、グロースイッチ2と安定化用コイル3の一端との接続点は、通路切替用スイッチ5の第3の接点5cに接続されている。
通路切替用スイッチ5は、第1乃至第3の接点5a~5cを有する1回路2接点の単投双極スイッチで、電子制御ユニット101からの切替制御信号により、第1の接点5aが、第2の接点5bと第3の接点5cのいずれかに選択的に切替接続されるようになっているものである。
かかる通路切替用スイッチ5は、例えば、電界効果トランジスタ等の半導体素子を主たる構成要素として構成されてなるものである。
そして、電子制御ユニット101から所定の切替制御信号が印加されると、第1の接点5aと第3の接点5cとが接続されるようになっている。
本発明の実施の形態においては、第1の接点5aとグランドとの間にグロープラグ(図1においては「G/P」と表記)1が直列接続されて設けられたものとなっている(図1(A)参照)。
電子制御ユニット101により処理が開始されると、最初にイグニッションスイッチ4がオンとされているか否かが判定されることとなる(図2のステップS202参照)。
すなわち、本発明の実施の形態においては、先に説明したように通路切替用スイッチ5は、ノーマル状態において、第1の接点5aと第2の接点5bとが接続されるものとなっている。そのため、グロープラグ1の通電開始となるステップS204においては、電子制御ユニット101から通電切替用スイッチ5に対して切替用制御信号は出力されず、第1の接点5aと第2の接点5bの接続状態が維持され、図示されない車両用バッテリとグランドとの間に、グロースイッチ2、安定化用コイル3、及び、通路切替用スイッチ5、及び、グロープラグ1が直列接続されることとなる(図1(A)参照)。
したがって、グロープラグ1の通電開始直後におけるグロープラグ1には、安定化用コイル3の作用により、図3(A)に模式的に示されたように、通電開始時に瞬時に大電流が流れることなく、ほぼ平滑化された状態の電流が流れることとなる。
次いで、ステップS206の処理へ進み、駆動移行条件が成立したか否かが判定されることとなる。
具体的な駆動移行条件としては、例えば、通電開始からの所定経過時間を挙げることができる。すなわち、通電開始から予め定められた時間が経過したか否かを判定し、経過したと判定された場合に、駆動移行条件成立として、安定化用コイル3を介することなくグロープラグ1へバッテリ電圧VBを印加し、通電駆動を行うようにすると好適である。
より具体的には、例えば、エンジン冷却水温をエンジンの駆動状態を表すパラメータとして、種々のエンジン冷却水温と、それぞれのエンジン冷却水温に対する好適な所定経過時間との関係を、試験やシミュレーション結果等に基づいて求め、これをいわゆるマップ化して電子制御ユニット101の適宜な記憶領域に記憶させる。そして、ステップS206の実行時におけるエンジン冷却水温に応じた所定経過時間を上述のマップから読み出すようにして、適切な所定経過時間を用いて駆動移行の要否を判定するようにしても良い。
なお、駆動移行条件は、これに限定されるものではなく、車両の種々の具体的な条件等によって、好適なものを選択するのが望ましい。
すなわち、グロープラグ1の累積エネルギーは、種々の表現を採り得るが、その一つとして、例えば、グロープラグ1への印加電圧をVgとし、通電開始からの経過時間をtとすると、累積エネルギーEgは、Eg=Vg2×tと表すことができる。なお、ここで、Vgは、実効値(RMS)である。
すなわち、この場合の累積エネルギーEgは、Eg=∫Vg(t)×Ig(t)dtとなる。なお、積分時間(積分期間)は、グロープラグ1の通電開始から駆動移行条件の判断時までの時間である。
また、本発明の実施の形態においては、通電電流Igの検出は、グロースイッチ2において直接検出するものに限定される必要はなく、通電電流Igが流れるラインに検出用の抵抗器を直列接続して設け、その電圧降下を電子制御ユニット101へ入力し、電流に換算して通電電流Igを得るようにしても良い。
なお、図1に示された構成要素と同一の構成要素については、同一の符号を付して、その詳細な説明を省略し、以下、異なる点を中心に説明する。
この図4に示された構成例は、グロースイッチ2とグロープラグ1との間に、並列接続状態とされた安定化用コイル3及び通路切替用スイッチ6が、直列接続されて設けられたものとなっている。
この構成例における通路切替用スイッチ6は、単極単投スイッチ、すなわち、1回路1接点のスイッチであり、例えば、電界効果トランジスタ等の半導体素子を主たる構成要素として構成されてなるものである。
かかる通路切替用スイッチ6の開閉成は、通路切替用スイッチ5と同様、電子制御ユニット101により制御されるものとなっている。
かかる構成における電子制御ユニット101により実行されるグロープラグ駆動制御処理は、先に図2を参照しつつ説明した処理と基本的に同一であるので、ここでの再度の説明は省略することとする。
なお、上述した本発明の実施の形態においては、グロー制御信号としてPWM信号を用いる例を示したが、必ずしもPWM信号に限定される必要はなく、他の形式の信号であっても良いものである。
また、電流安定化素子としてコイルを用いたが、電流安定化素子はコイルに限定される必要はなく、同等の特性を有する他の電子部品であっても良いことは勿論である。
Claims (7)
- 電源とグランドとの間にグロースイッチとグロープラグとが直列接続されて設けられると共に、前記グロースイッチの開閉成を制御する電子制御ユニットが設けられて、前記グロープラグの通電駆動を可能としてなるグロープラグ駆動制御装置であって、
前記電子制御ユニットによる制御に応じて、前記グロープラグの通電開始時に前記グロースイッチと前記グロープラグの直列接続路に電流安定化素子を直列接続せしめる一方、通電開始後、電源とグランドとの間に前記グロースイッチとグロープラグを直列接続状態に復帰せしめる通路切替用スイッチが設けられてなることを特徴とするグロープラグ駆動制御装置。 - 通路切替用スイッチは、第1乃至第3の接点を有し、前記第1の接点は、グロープラグの一端に、前記第2の接点は、電流安定化素子の一端に、前記第3の接点は、前記電流安定化素子の他端と共に、グロースイッチの一端に、それぞれ接続され、前記グロープラグの他端はグランドに接続される一方、前記グロースイッチの他端には電源電圧が印加可能とされ、
前記通路切替用スイッチは、電子制御ユニットからの切替制御信号が印加されるまでは、前記第1の接点と前記第2の接点とが接続状態とされ、前記電子制御ユニットからの切替制御信号が印加された際に、前記第1の接点と前記第3の接点が接続状態とされるよう構成されてなり、
前記電子制御ユニットは、前記グロープラグの通電開始後に、所定の駆動移行条件が成立したと判定された場合に、前記通路切替用スイッチへ前記切替制御信号を出力するよう構成されてなることを特徴とする請求項1記載のグロープラグ駆動制御装置。 - 所定の駆動移行条件は、グロープラグへの通電開始からの経過時間であって、電子制御ユニットは、予め定められた経過時間に達したと判定された際に、所定の駆動移行条件が成立したとするよう構成されてなることを特徴とする請求項2記載のグロープラグ駆動制御装置。
- 電子制御ユニットは、少なくともエンジン冷却水温に基づいて、予め定められた経過時間を算出するよう構成されてなることを特徴とする請求項3記載のグロープラグ駆動制御装置。
- 所定の駆動移行条件は、グロープラグの通電開始からの駆動に費やされた累積エネルギーであって、電子制御ユニットは、前記累積エネルギーが所定値に達したと判定された際に、所定の駆動移行条件が成立したとするよう構成されてなることを特徴とする請求項2記載のグロープラグ駆動制御装置。
- 累積エネルギーは、グロープラグへの印加電圧Vgと、通電開始時からの経過時間tとにより、Vg2×tとして表されたものであることを特徴とする請求項5記載のグロープラグ駆動制御装置。
- 累積エネルギーは、グロープラグへの印加電圧Vgと、グロープラグの通電電流Igとにより、∫Vg(t)・Ig(t)・dtとして表されたものであることを特徴とする請求項5記載のグロープラグ駆動制御装置。
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EP12863205.6A EP2800451A4 (en) | 2011-12-27 | 2012-11-05 | START CANDLE POWER CONTROL DEVICE |
US14/368,919 US9464617B2 (en) | 2011-12-27 | 2012-11-05 | Glow plug driving control apparatus |
JP2013551522A JP5843886B2 (ja) | 2011-12-27 | 2012-11-05 | グロープラグ駆動制御装置 |
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EP3321500A1 (en) | 2016-11-15 | 2018-05-16 | HIDRIA AET d.o.o. | Process for feeding an engine glowplug |
US12031513B2 (en) | 2020-11-18 | 2024-07-09 | Pratt & Whitney Canada Corp. | Method and system for glow plug operation |
US11739693B2 (en) | 2020-11-18 | 2023-08-29 | Pratt & Whitney Canada Corp. | Method and system for glow plug operation |
CA3177349A1 (en) * | 2021-10-06 | 2023-04-06 | Pratt & Whitney Canada Corp. | Method and system for glow plug operation |
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US9464617B2 (en) | 2016-10-11 |
JP5843886B2 (ja) | 2016-01-13 |
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US20140331955A1 (en) | 2014-11-13 |
EP2800451A4 (en) | 2016-05-18 |
JPWO2013099439A1 (ja) | 2015-04-30 |
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