WO2017113969A1 - High-voltage shunt circuit for ignition system - Google Patents

High-voltage shunt circuit for ignition system Download PDF

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Publication number
WO2017113969A1
WO2017113969A1 PCT/CN2016/103661 CN2016103661W WO2017113969A1 WO 2017113969 A1 WO2017113969 A1 WO 2017113969A1 CN 2016103661 W CN2016103661 W CN 2016103661W WO 2017113969 A1 WO2017113969 A1 WO 2017113969A1
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WIPO (PCT)
Prior art keywords
circuit
ignition system
mosfet
voltage
high voltage
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PCT/CN2016/103661
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French (fr)
Chinese (zh)
Inventor
何宏宇
程捷
孙晓庆
卢学文
王玉军
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联合汽车电子有限公司
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Publication of WO2017113969A1 publication Critical patent/WO2017113969A1/en

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Classifications

    • 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/125—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M3/135—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only

Definitions

  • the invention relates to an ignition system of an engine, and in particular to a high voltage shunt circuit for a series connection of thyristors for an ignition system.
  • the ignition system of the engine mainly includes an electronic control unit (Electronic Control) Unit, referred to as ECU), the ignition system related sensors, ignition switch, ignition coil and spark plug, wherein the ignition coil is the core component of the engine ignition system, as shown in Figure 1, the main structure includes the primary coil, the secondary coil and the guide Magnetic core.
  • ECU Electronic Control Unit
  • the operating mode of the mainstream engine ignition system is shown in Figure 1, and the ignition switch is controlled by the engine ECU.
  • the ECU receives the signal for processing and outputs a control signal to turn the ignition switch on, the primary coil starts to charge, and the energy is stored in the iron core; at the time of engine ignition, the ECU sends a control signal again to quickly turn off the ignition switch, and the current in the primary coil
  • the mutation causes a sudden change in the magnetic field of the iron core, and the secondary coil instantaneously induces tens of thousands of volts of high voltage, and the ignition of the mixture is completed by the spark plug.
  • EGR exhaust Gas Recirculation
  • a high-pressure energy storage device is currently added on the basis of the mainstream ignition system. Additional energy is injected into the secondary coil, and free adjustment of the ignition energy is achieved by controlling the opening and closing time of the high voltage switch, as shown in FIG.
  • the voltage of a high-voltage energy storage device can usually reach several thousand volts, which has greatly exceeded the maximum withstand voltage of a single electronic switch, and thus there is a problem of partial pressure.
  • the technical problem to be solved by the present invention is to provide a high voltage shunt circuit for an ignition system that can solve the problem of high voltage shunting of an ignition system with a high voltage accumulator.
  • the high voltage shunt circuit for an ignition system comprises a driving unit and a plurality of thyristors, wherein the driving unit comprises a square wave generator, a MOSFET driving chip, and a MOSFET (Metal-Oxide-Semiconductor) Field-Effect Transistor, that is, a metal-oxide-semiconductor field effect transistor (referred to as a metal oxide half field effect transistor) and a plurality of rectifier circuits;
  • the input end of the square wave generator is electrically connected to the ECU, and the output of the square wave generator and the MOSFET
  • the input end of the driving chip is electrically connected, and the MOSFET is respectively connected with the MOSFET driving chip and the rectifying circuit;
  • each thyristor corresponds to a rectifying circuit, all the thyristors are connected in series and the input end is connected with the high voltage accumulator device, and the output end and the ignition coil in the ignition system
  • each rectifier circuit comprises a transformer and a rectifier diode
  • the primary coil of the transformer is electrically connected to the MOSFET
  • one end of the secondary coil is connected to the gate of the corresponding thyristor through a rectifier diode
  • the other end of the secondary coil is connected to the corresponding thyristor
  • the cathodes are connected.
  • the G terminal of the MOSFET is connected to the MOSFET driving chip
  • the D terminal is connected to the primary coil of the transformer
  • the S terminal is grounded.
  • the series circuit composed of the thyristors is connected in parallel with a static voltage equalizing circuit.
  • the static voltage equalizing circuit is a voltage equalizing resistor.
  • the series circuit composed of the thyristors is connected in parallel with a dynamic voltage equalizing circuit.
  • the dynamic voltage equalizing circuit comprises a dynamic voltage equalizing resistor and a capacitor connected in series.
  • the square wave generator is a high frequency square wave generator.
  • the invention realizes a high-voltage shunting problem of a high-energy ignition system with a high-voltage energy storage device by connecting a plurality of thyristors in series to form a high-voltage shunting circuit with higher withstand voltage, and sequentially inputs the energy of the high-voltage accumulator device to the corresponding ignition coil.
  • the secondary coil is used to achieve extended discharge time, increase ignition energy, reduce misfire probability, improve combustion efficiency, reduce emissions, and increase power output.
  • Figure 1 is a schematic view of a prior art ignition system
  • FIG. 2 is a schematic illustration of an ignition system incorporating the high voltage shunt circuit and high pressure energy storage device of the present invention
  • FIG 3 is a schematic view of a high voltage shunt circuit of the present invention.
  • the high voltage shunt circuit for an ignition system of the present invention is suitable for an ignition system with a high voltage energy storage device.
  • a high voltage energy storage device is respectively connected to a secondary coil of a corresponding ignition coil through a plurality of high voltage switches.
  • the ECU controls the opening of the corresponding ignition coil high voltage switch, thereby realizing the high voltage energy storage device to continuously flow the secondary coil.
  • each ignition coil is equipped with a high-voltage shunt circuit, which is equivalent to a high-voltage switch, as shown in Figure 3, including the drive unit and several The thyristor, wherein the driving unit comprises a square wave generator, a MOSFET driving chip, a MOSFET and a plurality of rectifying circuits; the input end of the square wave generator is electrically connected to the ECU, and the output end of the square wave generator and the input end of the MOSFET driving chip are electrically connected Connected, the MOSFET is connected to the MOSFET driving chip and the rectifying circuit respectively; each thyristor corresponds to a rectifying circuit, all the thyristors are connected in series, the input end is connected to the high voltage accumulator device, and the output end is connected to the secondary coil of the ignition coil in the ignition system.
  • the square wave generator is a high frequency square wave generator
  • each rectifier circuit comprises a transformer and a rectifier diode, the primary coil of the transformer being electrically connected to the D terminal (ie, the drain) of the MOSFET, and one end of the secondary coil passing through the rectifier diode and the gate of the corresponding thyristor Connected, the other end of the secondary coil is connected to the cathode of the corresponding thyristor.
  • the G terminal (ie, the gate) of the MOSFET is connected to the MOSFET driving chip, and the S terminal (ie, the source) is grounded.
  • a series circuit composed of all thyristors is respectively connected in parallel with a static voltage equalization circuit and a dynamic voltage equalization circuit.
  • the static voltage equalizing circuit generally adopts a voltage equalizing resistor, and realizes static voltage equalization through a parallel circuit with a thyristor series circuit.
  • the dynamic voltage equalizing circuit generally adopts a dynamic voltage equalizing resistor and a capacitor, and realizes dynamic voltage equalization by connecting a resistor and a capacitor in series with the thyristor series circuit. .
  • the invention adopts a high voltage shunt circuit with a thyristor connected in series, and its working mode and performance are as follows:
  • Thyristor synchronous drive and synchronous conduction two or more transformers are driven by the same MOSFET to ensure the consistency of the transformer drive signal; the transformer output signal consistency is ensured by simultaneous winding of the transformer secondary multi-wire, ie thyristor drive Signal consistency; adjust the secondary capacitance of the transformer so that the rising slope of the thyristor drive signal reaches the thyristor drive requirement, which is beneficial to ensure the synchronous conduction of the thyristor;
  • Static pressure equalization and dynamic voltage equalization By static parallel voltage equalization circuit and dynamic voltage equalization circuit for thyristor series circuit, the static voltage equalization and dynamic voltage equalization problem of thyristor are solved;
  • High-voltage problem There are several thousand volts of high voltage in the secondary of the transformer.
  • the transformer and related electronic components must meet the high-voltage requirements.
  • the internal high-voltage insulation of the circuit board is done, and the external high-voltage insulation is also done.
  • the invention solves the problem of high-voltage shunting of a high-energy ignition system with a high-voltage energy storage device by connecting a plurality of thyristors in series to form a high-voltage shunting circuit with higher withstand voltage, and uses a plurality of high-voltage shunting circuits to order the energy of the high-voltage accumulator device in an orderly manner.
  • Input to the secondary coil of the corresponding ignition coil to achieve extended discharge time increase ignition energy, reduce misfire probability, improve combustion efficiency, reduce emissions, and increase power output.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

A high-voltage shunt circuit for an ignition system, comprising a drive unit and a plurality of thyristors, wherein the drive unit comprises a square-wave generator, a MOSFET drive chip, a MOSFET and a plurality of rectification circuits. An input terminal of the square-wave generator is electrically connected to an ECU, an output terminal of the square-wave generator is electrically connected to an input terminal of the MOSFET drive chip, and the MOSFET is connected to the MOSFET drive chip and the rectification circuits respectively. Each of the thyristors corresponds to a rectification circuit. All of the thyristors are sequentially connected in series, input terminals thereof are connected to a high-voltage energy storage device, and output terminals thereof are connected to a secondary coil of an ignition coil in the ignition system. By connecting a plurality of thyristors in series to form a high-voltage shunt circuit with a higher withstand voltage, the high-voltage shunt problem of a high-energy ignition system with a high-voltage energy storage device can be solved.

Description

用于点火系统的高压分流电路  High voltage shunt circuit for ignition system 技术领域Technical field
本发明与发动机的点火系统有关，具体属于一种用于点火系统的晶闸管串联的高压分流电路。  The invention relates to an ignition system of an engine, and in particular to a high voltage shunt circuit for a series connection of thyristors for an ignition system.
背景技术Background technique
发动机的点火系统主要包括电子控制单元（Electronic Control Unit，简称ECU）、与点火系统相关的传感器、点火开关、点火线圈以及火花塞，其中点火线圈是发动机点火系统的核心零部件，如图1所示，主要结构包括初级线圈、次级线圈以及导磁的铁芯。 The ignition system of the engine mainly includes an electronic control unit (Electronic Control) Unit, referred to as ECU), the ignition system related sensors, ignition switch, ignition coil and spark plug, wherein the ignition coil is the core component of the engine ignition system, as shown in Figure 1, the main structure includes the primary coil, the secondary coil and the guide Magnetic core.
目前，主流的发动机点火系统的工作模式如图1所示，点火开关由发动机ECU控制。充电时，ECU接收信号进行处理并输出控制信号使点火开关打开，初级线圈开始充电，能量储存在铁芯中；在发动机点火时刻，ECU再次发出控制信号使点火开关迅速关闭，初级线圈中的电流突变引起铁芯的磁场突变，次级线圈瞬时感应出数万伏高压，通过火花塞击穿混合气完成发动机点火。 At present, the operating mode of the mainstream engine ignition system is shown in Figure 1, and the ignition switch is controlled by the engine ECU. When charging, the ECU receives the signal for processing and outputs a control signal to turn the ignition switch on, the primary coil starts to charge, and the energy is stored in the iron core; at the time of engine ignition, the ECU sends a control signal again to quickly turn off the ignition switch, and the current in the primary coil The mutation causes a sudden change in the magnetic field of the iron core, and the secondary coil instantaneously induces tens of thousands of volts of high voltage, and the ignition of the mixture is completed by the spark plug.
随着法规对燃油经济性和排放的日益严苛，以及对发动机动力性的追求，加之新技术如增压、直喷、稀薄燃烧、均质燃烧及高EGR（Exhaust Gas Recirculation，简称EGR）率发动机的出现，对发动机点火系统提出了越来越高的要求，尤其是点火能量。由于安装尺寸的限制，点火线圈不能简单地通过增加尺寸来增加能量输出，并且作为点火系统核心零部件的点火线圈，当点火线圈的结构固定时，线圈能储存传递的能量有限，根本无法按照发动机的实际需求自由调节点火能量。 With regulations increasingly fuel economy and emissions, and the pursuit of engine power, coupled with new technologies such as supercharged, direct injection, lean combustion, homogeneous combustion and high EGR (Exhaust Gas Recirculation, referred to as EGR) rate engine, has placed increasing demands on the engine ignition system, especially the ignition energy. Due to the limitation of the installation size, the ignition coil cannot simply increase the size to increase the energy output, and as the ignition coil of the core component of the ignition system, when the structure of the ignition coil is fixed, the energy stored in the coil can be stored and limited, and the engine cannot be used at all. The actual demand freely regulates the ignition energy.
为了解决上述问题，目前在主流点火系统的基础上增加高压蓄能装置 为次级线圈注入额外的能量，并且通过控制高压开关的开闭时间实现点火能量的自由调节，如图2所示。 然而，高压蓄能装置的电压通常能达到数千伏，已经大大超过了目前单个电子开关的最大耐压值，因此存在分压问题。 In order to solve the above problems, a high-pressure energy storage device is currently added on the basis of the mainstream ignition system. Additional energy is injected into the secondary coil, and free adjustment of the ignition energy is achieved by controlling the opening and closing time of the high voltage switch, as shown in FIG. However, the voltage of a high-voltage energy storage device can usually reach several thousand volts, which has greatly exceeded the maximum withstand voltage of a single electronic switch, and thus there is a problem of partial pressure.
技术问题technical problem
本发明所要解决的技术问题是提供一种用于点火系统的高压分流电路，可以解决带高压蓄能装置的点火系统的高压分流问题。 The technical problem to be solved by the present invention is to provide a high voltage shunt circuit for an ignition system that can solve the problem of high voltage shunting of an ignition system with a high voltage accumulator.
技术解决方案Technical solution
为解决上述技术问题，本发明提供的用于点火系统的高压分流电路包括驱动单元和若干晶闸管，其中驱动单元包括方波发生器、MOSFET驱动芯片、MOSFET（Metal-Oxide-Semiconductor Field-Effect Transistor，即金属-氧化物-半导体场效应晶体管，简称金氧半场效晶体管）和若干整流电路；所述方波发生器的输入端与ECU电性连接，方波发生器的输出端与MOSFET驱动芯片的输入端电性连接，MOSFET分别与MOSFET驱动芯片、整流电路相连；每个晶闸管对应一个整流电路，所有晶闸管依次串联且输入端与高压蓄能装置相连、输出端与点火系统中点火线圈的次级线圈相连。 To solve the above technical problem, the high voltage shunt circuit for an ignition system provided by the present invention comprises a driving unit and a plurality of thyristors, wherein the driving unit comprises a square wave generator, a MOSFET driving chip, and a MOSFET (Metal-Oxide-Semiconductor) Field-Effect Transistor, that is, a metal-oxide-semiconductor field effect transistor (referred to as a metal oxide half field effect transistor) and a plurality of rectifier circuits; the input end of the square wave generator is electrically connected to the ECU, and the output of the square wave generator and the MOSFET The input end of the driving chip is electrically connected, and the MOSFET is respectively connected with the MOSFET driving chip and the rectifying circuit; each thyristor corresponds to a rectifying circuit, all the thyristors are connected in series and the input end is connected with the high voltage accumulator device, and the output end and the ignition coil in the ignition system The secondary coils are connected.
其中，每个整流电路包括变压器和整流二极管，所述变压器的初级线圈与MOSFET电性连接，次级线圈的一端通过整流二极管与对应晶闸管的门极相连，次级线圈的另一端与对应晶闸管的阴极相连。所述MOSFET的G端与MOSFET驱动芯片相连接，D端与变压器的初级线圈相连接，S端接地。 Wherein, each rectifier circuit comprises a transformer and a rectifier diode, the primary coil of the transformer is electrically connected to the MOSFET, one end of the secondary coil is connected to the gate of the corresponding thyristor through a rectifier diode, and the other end of the secondary coil is connected to the corresponding thyristor The cathodes are connected. The G terminal of the MOSFET is connected to the MOSFET driving chip, the D terminal is connected to the primary coil of the transformer, and the S terminal is grounded.
进一步的，所述晶闸管组成的串联电路与一静态均压电路并联。其中，所述静态均压电路为均压电阻。 Further, the series circuit composed of the thyristors is connected in parallel with a static voltage equalizing circuit. Wherein, the static voltage equalizing circuit is a voltage equalizing resistor.
进一步的，所述晶闸管组成的串联电路与一动态均压电路并联。其中，所述动态均压电路包括串联的动态均压电阻和电容。 Further, the series circuit composed of the thyristors is connected in parallel with a dynamic voltage equalizing circuit. Wherein, the dynamic voltage equalizing circuit comprises a dynamic voltage equalizing resistor and a capacitor connected in series.
在上述电路中，所述方波发生器为高频方波发生器。 In the above circuit, the square wave generator is a high frequency square wave generator.
有益效果Beneficial effect
本发明通过将若干晶闸管串联形成一个耐压更高的高压分流电路，这样可以解决带高压蓄能装置的高能点火系统的高压分流问题，将高压蓄能装置的能量有序地输入到对应点火线圈的次级线圈，从而达到延长放电时间、增加点火能量、降低失火概率、提高燃烧效率、减少排放、增加动力输出的效果。 The invention realizes a high-voltage shunting problem of a high-energy ignition system with a high-voltage energy storage device by connecting a plurality of thyristors in series to form a high-voltage shunting circuit with higher withstand voltage, and sequentially inputs the energy of the high-voltage accumulator device to the corresponding ignition coil. The secondary coil is used to achieve extended discharge time, increase ignition energy, reduce misfire probability, improve combustion efficiency, reduce emissions, and increase power output.
附图说明DRAWINGS
图1为现有的点火系统的示意图； Figure 1 is a schematic view of a prior art ignition system;
图2为含有本发明的高压分流电路和高压蓄能装置的点火系统的示意图； Figure 2 is a schematic illustration of an ignition system incorporating the high voltage shunt circuit and high pressure energy storage device of the present invention;
图3为本发明的高压分流电路的示意图。 3 is a schematic view of a high voltage shunt circuit of the present invention.
本发明的最佳实施方式BEST MODE FOR CARRYING OUT THE INVENTION
本发明的实施方式Embodiments of the invention
下面结合附图与具体实施方式对本发明作进一步详细的说明。 The present invention will be further described in detail below with reference to the drawings and specific embodiments.
本发明的用于点火系统的高压分流电路，适用于带高压蓄能装置的点火系统，如图2所示，一个高压蓄能装置通过若干高压开关分别与对应的点火线圈的次级线圈相连并通过ECU控制相应点火线圈高压开关的开通，从而实现高压蓄能装置依次为次级线圈续流。由于所有点火线圈共用一个高压蓄能装置，它能产生数千伏高压，所以每个点火线圈配备一个高压分流电路，该高压分流电路相当于高压开关，如图3所述，包括驱动单元和若干晶闸管，其中驱动单元包括方波发生器、MOSFET驱动芯片、MOSFET和若干整流电路；方波发生器的输入端与ECU电性连接，方波发生器的输出端与MOSFET驱动芯片的输入端电性连接，MOSFET分别与MOSFET驱动芯片、整流电路相连；每个晶闸管对应一个整流电路，所有晶闸管依次串联且输入端与高压蓄能装置相连、输出端与点火系统中点火线圈的次级线圈相连。在上述电路中，所述方波发生器为高频方波发生器。例如，方波发生器的工作频率为10KHZ～100KHZ。 The high voltage shunt circuit for an ignition system of the present invention is suitable for an ignition system with a high voltage energy storage device. As shown in FIG. 2, a high voltage energy storage device is respectively connected to a secondary coil of a corresponding ignition coil through a plurality of high voltage switches. The ECU controls the opening of the corresponding ignition coil high voltage switch, thereby realizing the high voltage energy storage device to continuously flow the secondary coil. Since all the ignition coils share a high-voltage energy storage device, which can generate thousands of volts of high voltage, each ignition coil is equipped with a high-voltage shunt circuit, which is equivalent to a high-voltage switch, as shown in Figure 3, including the drive unit and several The thyristor, wherein the driving unit comprises a square wave generator, a MOSFET driving chip, a MOSFET and a plurality of rectifying circuits; the input end of the square wave generator is electrically connected to the ECU, and the output end of the square wave generator and the input end of the MOSFET driving chip are electrically connected Connected, the MOSFET is connected to the MOSFET driving chip and the rectifying circuit respectively; each thyristor corresponds to a rectifying circuit, all the thyristors are connected in series, the input end is connected to the high voltage accumulator device, and the output end is connected to the secondary coil of the ignition coil in the ignition system. In the above circuit, the square wave generator is a high frequency square wave generator. For example, the square wave generator operates at a frequency of 10 kHz to 100 kHz.
在该实施例中，每个整流电路包括变压器和整流二极管，所述变压器的初级线圈与MOSFET的D端（即漏极）电性连接，次级线圈的一端通过整流二极管与对应晶闸管的门极相连，次级线圈的另一端与对应晶闸管的阴极相连。MOSFET的G端（即栅极）与MOSFET驱动芯片相连接，S端（即源极）接地。 In this embodiment, each rectifier circuit comprises a transformer and a rectifier diode, the primary coil of the transformer being electrically connected to the D terminal (ie, the drain) of the MOSFET, and one end of the secondary coil passing through the rectifier diode and the gate of the corresponding thyristor Connected, the other end of the secondary coil is connected to the cathode of the corresponding thyristor. The G terminal (ie, the gate) of the MOSFET is connected to the MOSFET driving chip, and the S terminal (ie, the source) is grounded.
此外，为了实现静态均压和动态均压，由所有晶闸管组成的串联电路分别与一静态均压电路、一动态均压电路并联。其中，静态均压电路一般采用均压电阻，通过与晶闸管串联电路并联电阻实现静态均压，动态均压电路一般采用动态均压电阻、电容，通过与晶闸管串联电路并联电阻、电容实现动态均压。 In addition, in order to achieve static voltage equalization and dynamic voltage equalization, a series circuit composed of all thyristors is respectively connected in parallel with a static voltage equalization circuit and a dynamic voltage equalization circuit. Among them, the static voltage equalizing circuit generally adopts a voltage equalizing resistor, and realizes static voltage equalization through a parallel circuit with a thyristor series circuit. The dynamic voltage equalizing circuit generally adopts a dynamic voltage equalizing resistor and a capacitor, and realizes dynamic voltage equalization by connecting a resistor and a capacitor in series with the thyristor series circuit. .
本发明采用晶闸管串联的高压分流电路，其工作模式及性能如下： The invention adopts a high voltage shunt circuit with a thyristor connected in series, and its working mode and performance are as follows:
1 ）实现信号传递：根据点火时序，当需要将高压输送到发动机某一缸时，ECU发送信号给对应的高频方波发生器，它能产生一定占空比的高频信号给MOSFET驱动芯片，从而驱动MOSFET实现变压器的高频开关，变压器在高频开关过程中产生电流脉冲信号来控制对应晶闸管的开关； 1 ) Signal transmission: According to the ignition timing, when it is necessary to deliver high voltage to a certain cylinder of the engine, the ECU sends a signal to the corresponding high-frequency square wave generator, which can generate a high-frequency signal with a certain duty ratio to the MOSFET driving chip. Thereby driving the MOSFET to realize the high frequency switch of the transformer, the transformer generates a current pulse signal during the high frequency switching process to control the switch corresponding to the thyristor;
2 ）晶闸管同步驱动与同步导通：采用同一个MOSFET驱动两个或多个变压器，保证变压器驱动信号的一致性；通过变压器次级多线同时绕制来保证变压器输出信号的一致性，即晶闸管驱动信号的一致性；调节变压器次级电容，使晶闸管驱动信号的上升斜率达到晶闸管驱动要求，有利于保证晶闸管同步导通； 2 ) Thyristor synchronous drive and synchronous conduction: two or more transformers are driven by the same MOSFET to ensure the consistency of the transformer drive signal; the transformer output signal consistency is ensured by simultaneous winding of the transformer secondary multi-wire, ie thyristor drive Signal consistency; adjust the secondary capacitance of the transformer so that the rising slope of the thyristor drive signal reaches the thyristor drive requirement, which is beneficial to ensure the synchronous conduction of the thyristor;
3 ）静态均压和动态均压：通过为晶闸管串联电路并联静态均压电路和动态均压电路，解决了晶闸管的静态均压和动态均压问题； 3 Static pressure equalization and dynamic voltage equalization: By static parallel voltage equalization circuit and dynamic voltage equalization circuit for thyristor series circuit, the static voltage equalization and dynamic voltage equalization problem of thyristor are solved;
4 ）高压问题：变压器次级存在数千伏高压，变压器及相关电子件均需满足高压要求，在电路布线过程中做好电路板的内部高压绝缘，并同时做好外部高压绝缘。  4 High-voltage problem: There are several thousand volts of high voltage in the secondary of the transformer. The transformer and related electronic components must meet the high-voltage requirements. In the circuit wiring process, the internal high-voltage insulation of the circuit board is done, and the external high-voltage insulation is also done.
以上通过具体实施例对本发明进行了详细的说明，所述实施例仅仅是本发明的较佳实施例，其并非对本发明进行限制。在不脱离本发明原理的情况下，本领域的技术人员对电子元器件的类型等做出的等效置换和改进，均应视为在本发明所保护的技术范畴内。 The present invention has been described in detail by reference to the preferred embodiments thereof, which are not intended to limit the invention. Equivalent substitutions and improvements made by those skilled in the art to the type of electronic component, etc., should be considered within the technical scope of the present invention without departing from the principles of the invention.
工业实用性Industrial applicability
本发明通过将若干晶闸管串联形成一个耐压更高的高压分流电路，这样可以解决带高压蓄能装置的高能点火系统的高压分流问题，利用若干高压分流电路将高压蓄能装置的能量有序地输入到对应点火线圈的次级线圈，从而达到延长放电时间、增加点火能量、降低失火概率、提高燃烧效率、减少排放、增加动力输出的效果。 The invention solves the problem of high-voltage shunting of a high-energy ignition system with a high-voltage energy storage device by connecting a plurality of thyristors in series to form a high-voltage shunting circuit with higher withstand voltage, and uses a plurality of high-voltage shunting circuits to order the energy of the high-voltage accumulator device in an orderly manner. Input to the secondary coil of the corresponding ignition coil to achieve extended discharge time, increase ignition energy, reduce misfire probability, improve combustion efficiency, reduce emissions, and increase power output.
序列表自由内容Sequence table free content

Claims (8)

1 、一种用于点火系统的高压分流电路，其特征在于，包括驱动单元和若干晶闸管，其中驱动单元包括方波发生器、MOSFET驱动芯片、MOSFET和若干整流电路；所述方波发生器的输入端与ECU电性连接，方波发生器的输出端与MOSFET驱动芯片的输入端电性连接，MOSFET分别与MOSFET驱动芯片、整流电路相连；每个晶闸管对应一个整流电路，所有晶闸管依次串联且输入端与高压蓄能装置相连、输出端与点火系统中点火线圈的次级线圈相连。1 A high voltage shunt circuit for an ignition system, comprising: a driving unit and a plurality of thyristors, wherein the driving unit comprises a square wave generator, a MOSFET driving chip, a MOSFET and a plurality of rectifying circuits; the input of the square wave generator The terminal is electrically connected to the ECU, and the output end of the square wave generator is electrically connected to the input end of the MOSFET driving chip, and the MOSFET is respectively connected with the MOSFET driving chip and the rectifying circuit; each thyristor corresponds to a rectifying circuit, and all the thyristors are serially connected and input. The end is connected to the high voltage accumulator and the output is connected to the secondary coil of the ignition coil in the ignition system.
2 、根据权利要求1所述的用于点火系统的高压分流电路，其特征在于，每个整流电路包括变压器和整流二极管，所述变压器的初级线圈与MOSFET电性连接，次级线圈的一端通过整流二极管与对应晶闸管的门极相连，次级线圈的另一端与对应晶闸管的阴极相连。2 The high voltage shunt circuit for an ignition system according to claim 1, wherein each of the rectifying circuits comprises a transformer and a rectifying diode, wherein a primary coil of the transformer is electrically connected to the MOSFET, and one end of the secondary coil is rectified The diode is connected to the gate of the corresponding thyristor, and the other end of the secondary coil is connected to the cathode of the corresponding thyristor.
3 、根据权利要求2所述的用于点火系统的高压分流电路，其特征在于，所述MOSFET的G端与MOSFET驱动芯片相连接，D端与变压器的初级线圈相连接，S端接地。3 The high voltage shunt circuit for an ignition system according to claim 2, wherein the G terminal of the MOSFET is connected to the MOSFET driving chip, the D terminal is connected to the primary coil of the transformer, and the S terminal is grounded.
4 、根据权利要求1所述的用于点火系统的高压分流电路，其特征在于，所述晶闸管组成的串联电路与一静态均压电路并联。4 The high voltage shunt circuit for an ignition system according to claim 1, wherein the series circuit of the thyristors is connected in parallel with a static voltage equalizing circuit.
5 、根据权利要求4所述的用于点火系统的高压分流电路，其特征在于，所述静态均压电路为均压电阻。5. The high voltage shunt circuit for an ignition system according to claim 4, wherein said static voltage equalizing circuit is a voltage equalizing resistor.
6 、根据权利要求1所述的用于点火系统的高压分流电路，其特征在于，所述晶闸管组成的串联电路与一动态均压电路并联。6 The high voltage shunting circuit for an ignition system according to claim 1, wherein the series circuit of the thyristors is connected in parallel with a dynamic voltage equalizing circuit.
7 、根据权利要求6所述的用于点火系统的高压分流电路，其特征在于，所述动态均压电路包括串联的动态均压电阻和电容。7 The high voltage shunt circuit for an ignition system according to claim 6, wherein said dynamic voltage equalization circuit comprises a dynamic voltage equalizing resistor and a capacitor connected in series.
8 、根据权利要求1所述的用于点火系统的高压分流电路，其特征在于，所述方波发生器为高频方波发生器。 8. The high voltage shunt circuit for an ignition system according to claim 1, wherein said square wave generator is a high frequency square wave generator.
PCT/CN2016/103661 2015-12-30 2016-10-28 High-voltage shunt circuit for ignition system WO2017113969A1 (en)

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