WO2024142591A1 - スイッチ制御装置、スイッチ装置、エンジン点火装置、及び車両 - Google Patents

スイッチ制御装置、スイッチ装置、エンジン点火装置、及び車両 Download PDF

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Publication number
WO2024142591A1
WO2024142591A1 PCT/JP2023/039257 JP2023039257W WO2024142591A1 WO 2024142591 A1 WO2024142591 A1 WO 2024142591A1 JP 2023039257 W JP2023039257 W JP 2023039257W WO 2024142591 A1 WO2024142591 A1 WO 2024142591A1
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WO
WIPO (PCT)
Prior art keywords
voltage
current
switch
circuit
switch element
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.)
Ceased
Application number
PCT/JP2023/039257
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English (en)
French (fr)
Japanese (ja)
Inventor
寛幸 谷川
敦司 田口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohm Co Ltd
Original Assignee
Rohm Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rohm Co Ltd filed Critical Rohm Co Ltd
Priority to JP2024567250A priority Critical patent/JPWO2024142591A1/ja
Publication of WO2024142591A1 publication Critical patent/WO2024142591A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition 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

Definitions

  • the invention disclosed in this specification relates to a switch control device, a switch device, an engine ignition device, and a vehicle.
  • a switch control device it is desirable that the current flowing through the switch element does not affect the control of the switch element. From the standpoint of cost, etc., it is desirable for a switch control device to have a simple circuit configuration that can prevent the current flowing through the switch element from affecting the control of the switch element.
  • the igniter 10 is a switch device that includes a switch element chip 11 and a switch control device 12.
  • the igniter 10 is a means for turning on/off the primary coil current of the ignition coil 20 (corresponding to the collector current Ic of the switch element 111 described later).
  • the igniter 10 is provided as a semiconductor integrated circuit device in which the switch element chip 11 and the switch control device 12 are packaged.
  • the switch element chip 11 includes a switch element 111 and a shunt resistor 112.
  • the switch element chip 11 also includes a collector pad Pc, an emitter pad Pe, a gate pad Pg1, and a shunt pad Psr1 as electrode pads for establishing an electrical connection with the outside.
  • the switch control device 12 includes a signal generating circuit 121, a switch element drive control circuit 122, and a current detection circuit 123.
  • the switch control device 12 also includes a power supply pad Pvdd, an input pad Pin, a gate pad Pg2, a shunt pad Psr2, and a ground pad Ppgnd as electrode pads for establishing an electrical connection with the outside.
  • a power supply voltage Vdd output from the power supply 2 is applied to the power supply pad Pvdd.
  • the shunt pads Psr1 and Psr2 are connected by a bonding wire W2.
  • the current detection circuit 123 determines the potential difference across the shunt resistor 112 from the voltage applied to the shunt pad Psr2 and the voltage applied to the ground pad Ppgnd, and detects the primary coil current of the ignition coil 20 based on the potential difference across the shunt resistor 112.
  • the current detection circuit 123 outputs an overcurrent detection signal to the switch element drive control circuit 122.
  • the switch element drive control circuit 122 fixes the gate signal Sg to a low level regardless of the level of the control signal Scmp. This makes it possible to turn off the switch element 111 in the event of an overcurrent state, preventing the collector current Ic from flowing.
  • Figure 2 is a timing chart showing the operation sequence of the igniter 10. From the top to the bottom, Figure 2 shows example waveforms of the ignition instruction signal IGT, the collector current Ic, the voltage PGND applied to the ground pad Ppgnd, and the potential difference (IGT-PGND) between the ignition instruction signal IGT and the voltage PGND.
  • the switch control device 12 has a ground pad Psgnd that is separate from the ground pad Ppgnd.
  • a first harness (not shown) is provided for connecting the power source 2 to the ground pad Ppgnd
  • a second harness (not shown) is provided for connecting the power source 2 and the ECU 3 to the ground pad Psgnd.
  • Resistor 4 in FIG. 3 is the resistance component of the first harness described above.
  • Resistor 5 in FIG. 3 is the resistance component of the second harness described above.
  • the signal generating circuit 121 does not include a power element, the current consumption of the signal generating circuit 121 is very small compared to the collector current Ic. Therefore, the change in voltage SGND due to the influence of the current consumption of the signal generating circuit 121 and resistor 5 is very small. As a result, the waveform of the potential difference (IGT-SGND) between the ignition instruction signal IGT and the voltage SGND is almost identical to the waveform of the ignition instruction signal IGT.
  • the engine ignition device 1 of the second comparative example can solve the problems faced by the engine ignition device 1 of the first comparative example.
  • the signal generating circuit 121 shown in FIG. 5 includes a bandgap reference voltage circuit 1211, a reference voltage circuit 1212, resistors R1 to R5, a diode D1, a capacitor C1, and a comparator CMP1.
  • the ground voltage application terminal of the bandgap reference voltage circuit 1211 is connected to the ground pad Ppgnd.
  • the voltage PGND applied to the ground pad Ppgnd is the ground voltage of the entire semiconductor chip substrate of the switch control device 12.
  • the bandgap reference voltage circuit 1211 generates a bandgap reference voltage V_BG that is a predetermined value higher than the voltage PGND, and supplies the bandgap reference voltage V_BG to each part of the switch control device 12.
  • the potential difference (IGT-SGND) between the ignition command signal IGT supplied to the input pad Pin and the voltage SGND applied to the ground pad Psgnd is divided by resistors R1 and R2, and after noise components are removed by a filter circuit formed by resistor R5 and capacitor C1, it is supplied to the non-inverting input terminal of comparator CMP1.
  • the first end of resistor R1 is connected to the input pad Pin.
  • the second end of resistor R1 is connected to the first end of resistor R2 and the first end of resistor R5.
  • the second end of resistor R5 is connected to the first end of capacitor C1 and the non-inverting input terminal of comparator CMP1.
  • the overall configuration of the engine ignition device 1 according to the embodiment is the same as the overall configuration of the engine ignition device 1 according to the second comparative example, and is the configuration shown in FIG. 3.
  • the first end of resistor R1 is connected to the input pad Pin.
  • the second end of resistor R1 is connected to the first end of resistor R2 and the first end of resistor R5.
  • the second end of resistor R5 is connected to the first end of capacitor C1 and the non-inverting input terminal of comparator CMP1.
  • the DC/DC converter 67 receives DC power from the high-power DC/DC converter 62 and converts the received DC power into low-voltage DC power.
  • the power source 2 which is a low-voltage battery, is charged by the low-voltage DC power output from the DC/DC converter 67.
  • the discharge power discharged from the power source 2 is supplied to the engine ignition device 1 according to the embodiment, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
PCT/JP2023/039257 2022-12-28 2023-10-31 スイッチ制御装置、スイッチ装置、エンジン点火装置、及び車両 Ceased WO2024142591A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2024567250A JPWO2024142591A1 (https=) 2022-12-28 2023-10-31

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-212029 2022-12-28
JP2022212029 2022-12-28

Publications (1)

Publication Number Publication Date
WO2024142591A1 true WO2024142591A1 (ja) 2024-07-04

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Family Applications (1)

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PCT/JP2023/039257 Ceased WO2024142591A1 (ja) 2022-12-28 2023-10-31 スイッチ制御装置、スイッチ装置、エンジン点火装置、及び車両

Country Status (2)

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JP (1) JPWO2024142591A1 (https=)
WO (1) WO2024142591A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5810161A (ja) * 1981-07-10 1983-01-20 Nippon Denso Co Ltd 内燃機関用点火時期制御装置
JP2013243500A (ja) * 2012-05-18 2013-12-05 Fuji Electric Co Ltd 入力判定回路
JP2015010583A (ja) * 2013-07-01 2015-01-19 ローム株式会社 スイッチ制御回路、イグナイタ、エンジン点火装置、車両
JP2018014561A (ja) * 2016-07-19 2018-01-25 富士電機株式会社 半導体装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5810161A (ja) * 1981-07-10 1983-01-20 Nippon Denso Co Ltd 内燃機関用点火時期制御装置
JP2013243500A (ja) * 2012-05-18 2013-12-05 Fuji Electric Co Ltd 入力判定回路
JP2015010583A (ja) * 2013-07-01 2015-01-19 ローム株式会社 スイッチ制御回路、イグナイタ、エンジン点火装置、車両
JP2018014561A (ja) * 2016-07-19 2018-01-25 富士電機株式会社 半導体装置

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