JP2020139787A - Electronic controller - Google Patents

Electronic controller Download PDF

Info

Publication number
JP2020139787A
JP2020139787A JP2019034297A JP2019034297A JP2020139787A JP 2020139787 A JP2020139787 A JP 2020139787A JP 2019034297 A JP2019034297 A JP 2019034297A JP 2019034297 A JP2019034297 A JP 2019034297A JP 2020139787 A JP2020139787 A JP 2020139787A
Authority
JP
Japan
Prior art keywords
disconnection
drive signal
drain wire
injector
microcomputer
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.)
Granted
Application number
JP2019034297A
Other languages
Japanese (ja)
Other versions
JP7172731B2 (en
Inventor
拓未 有田
Takumi Arita
拓未 有田
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.)
Denso Corp
Original Assignee
Denso Corp
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 Denso Corp filed Critical Denso Corp
Priority to JP2019034297A priority Critical patent/JP7172731B2/en
Publication of JP2020139787A publication Critical patent/JP2020139787A/en
Application granted granted Critical
Publication of JP7172731B2 publication Critical patent/JP7172731B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems

Abstract

To provide an electronic controller capable of detecting a breakage of a drain wire without decreasing a shield effect in a configuration where an inductive load is driven using a shield line.SOLUTION: ECU1 comprises a terminal T3 to make a shield line 5 used for outputting a drive signal to an injector 2 connected to a circuit ground via a drain wire 8. A micro computer 3 switches on and off of FET 13 connected in series with a resistor 9 between a power supply VDD and the drain wire 8 to detect a breakage of the drain wire 8.SELECTED DRAWING: Figure 1

Description

本発明は、シールド線を接地するためのドレイン線の断線を検出する機能を備えた電子制御装置に関する。 The present invention relates to an electronic control unit having a function of detecting a disconnection of a drain wire for grounding a shield wire.

例えばECU(Electronic Control Unit)のような電子制御装置が、例えばインジェクタ等の誘導性負荷に駆動信号を出力するための信号線には、ノイズを抑制するためにシールド線が用いられる。一般に、シールド線は、ドレイン線を介してECU側のグランドに接地される。ドレイン線が断線しているか否かを判定するためには、例えば、ドレイン線に通電を行った際に、電流がドレイン線を介して流れるか否かによって行うことができる。 For example, a shield wire is used as a signal line for an electronic control device such as an ECU (Electronic Control Unit) to output a drive signal to an inductive load such as an injector to suppress noise. Generally, the shield wire is grounded to the ground on the ECU side via the drain wire. In order to determine whether or not the drain wire is broken, for example, when the drain wire is energized, it can be determined whether or not a current flows through the drain wire.

特公平7−3447号公報Special Fair 7-3447 Gazette

しかしながら、ドレイン線に通電を行うと、シールド線のシールド効果が低下するという問題がある。 However, when the drain wire is energized, there is a problem that the shielding effect of the shield wire is lowered.

本発明は上記事情に鑑みてなされたものであり、その目的は、シールド線を用いて誘導性負荷を駆動する構成においても、シールド効果を低下させることなくドレイン線の断線を検出できる電子制御装置を提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is an electronic control unit capable of detecting a disconnection of a drain wire without deteriorating the shielding effect even in a configuration in which an inductive load is driven by using a shield wire. Is to provide.

請求項1記載の電子制御装置によれば、誘導性負荷に駆動信号を出力するために使用されるシールド線を、ドレイン線を介してグランドに接地するための接地端子を備える。断線検出部は、電源と接地端子との間に抵抗素子と共に直列接続されるスイッチング素子のオンオフを切り替えて、ドレイン線の断線を検出する。このように構成すれば、断線検出部は、シールド線のシールド効果が低下しても影響がない期間にドレイン線の断線の有無を検出できる。 According to the electronic control unit according to claim 1, the shield wire used for outputting a drive signal to the inductive load is provided with a ground terminal for grounding to the ground via the drain wire. The disconnection detection unit detects the disconnection of the drain wire by switching on / off of the switching element connected in series with the resistance element between the power supply and the ground terminal. With this configuration, the disconnection detection unit can detect the presence or absence of disconnection of the drain wire during a period in which there is no effect even if the shielding effect of the shield wire is reduced.

請求項2記載の電子制御装置によれば、断線検出部は、信号出力部が駆動信号を出力していない期間にスイッチング素子をオンすることで断線を検出する。すなわち、信号出力部が駆動信号を出力していない期間は、シールド線のシールド効果が低下しても影響がないので、ノイズの発生を抑制しつつドレイン線の断線の有無を検出できる。 According to the electronic control unit according to claim 2, the disconnection detection unit detects the disconnection by turning on the switching element during the period when the signal output unit is not outputting the drive signal. That is, during the period when the signal output unit is not outputting the drive signal, even if the shielding effect of the shield wire is reduced, there is no effect, so that it is possible to detect the presence or absence of disconnection of the drain wire while suppressing the generation of noise.

第1実施形態であり、インジェクタを駆動するECUの電気的構成を示す図The figure which shows 1st Embodiment and shows the electric structure of the ECU which drives an injector. インジェクタの駆動状態と断線検出の実施状態,及び検出結果の一欄を示す図The figure which shows the driving state of an injector, the execution state of disconnection detection, and one column of the detection result. インジェクタの駆動状態と断線検出の実施状態,及び検出結果の一例を示すタイミングチャートTiming chart showing the injector drive status, disconnection detection implementation status, and an example of the detection result 第2実施形態であり、インジェクタを駆動するECUの電気的構成を示す図The figure which shows the electric structure of the ECU which drives the injector which is 2nd Embodiment インジェクタの駆動状態と断線検出の実施状態,及び検出結果の一例を示すタイミングチャートTiming chart showing the injector drive status, disconnection detection implementation status, and an example of the detection result 第3実施形態であり、インジェクタを駆動するECUの電気的構成を示す図FIG. 3 is a diagram showing an electrical configuration of an ECU that drives an injector according to a third embodiment. インジェクタの駆動状態と断線検出の実施状態,及び検出結果の一例を示すタイミングチャート(その1)Timing chart showing the driving state of the injector, the execution state of disconnection detection, and an example of the detection result (Part 1) インジェクタの駆動状態と断線検出の実施状態,及び検出結果の一例を示すタイミングチャート(その2)Timing chart showing the driving state of the injector, the execution state of disconnection detection, and an example of the detection result (Part 2)

(第1実施形態)
図1に示すように、電子制御装置に相当する本実施形態のECU1は、例えば車両に搭載され、エンジンのシリンダ内に燃料を噴射するインジェクタ2を駆動する。インジェクタ2は誘導性負荷に相当する。ECU1は、マイクロコンピュータ3を備えている。以下、マイコン3と称する。マイコン3は、出力ポートOUT1より、INJ駆動回路4を介してインジェクタ2に駆動信号を出力する。ECU1の出力端子T1,T2とインジェクタ2との間は、シールド線5を介して接続されている。
(First Embodiment)
As shown in FIG. 1, the ECU 1 of the present embodiment corresponding to the electronic control device is mounted on a vehicle, for example, and drives an injector 2 that injects fuel into a cylinder of an engine. The injector 2 corresponds to an inductive load. The ECU 1 includes a microcomputer 3. Hereinafter, it will be referred to as a microcomputer 3. The microcomputer 3 outputs a drive signal from the output port OUT1 to the injector 2 via the INJ drive circuit 4. The output terminals T1 and T2 of the ECU 1 and the injector 2 are connected to each other via a shield wire 5.

シールド線5は、絶縁された電線である信号線6と、信号線6の周囲を覆うシールド7とで構成されている。シールド7は、ドレイン線8及びECU1の端子T3を介してECU1の回路グランドに接続されている。端子T3は接地端子に相当する。ECU1の内部において、電源VDDとグランドとの間には、抵抗素子9及びコンデンサ10の直列回路が接続されている。抵抗素子9及びコンデンサ10の共通接続点は、ダイオード11のアノードと抵抗素子12の一端とに接続されている。ダイオード11のカソードはNチャネルMOSFET13のドレインに接続されている。抵抗素子12の他端は、マイコン3の入力ポートINに接続されている。 The shielded wire 5 is composed of a signal line 6 which is an insulated electric wire and a shield 7 which covers the periphery of the signal line 6. The shield 7 is connected to the circuit ground of the ECU 1 via the drain wire 8 and the terminal T3 of the ECU 1. The terminal T3 corresponds to a ground terminal. Inside the ECU 1, a series circuit of the resistance element 9 and the capacitor 10 is connected between the power supply VDD and the ground. The common connection point of the resistance element 9 and the capacitor 10 is connected to the anode of the diode 11 and one end of the resistance element 12. The cathode of the diode 11 is connected to the drain of the N-channel MOSFET 13. The other end of the resistance element 12 is connected to the input port IN of the microcomputer 3.

スイッチング素子であるFET13のソースはECU1の出力端子T4に接続され、出力端子T4は信号線14を介してシールド線5のシールド7に接続されている。マイコン3は、出力ポートOUT2より、FET13のゲートにゲート駆動信号を出力する。マイコン3は、駆動信号出力部及び断線検出部に相当する。 The source of the FET 13 which is a switching element is connected to the output terminal T4 of the ECU 1, and the output terminal T4 is connected to the shield 7 of the shield wire 5 via the signal line 14. The microcomputer 3 outputs a gate drive signal from the output port OUT2 to the gate of the FET 13. The microcomputer 3 corresponds to a drive signal output unit and a disconnection detection unit.

次に、本実施形態の作用について説明する。マイコン3は、インジェクタ2を駆動しながらFET13のオンオフを制御してドレイン線8の断線検出を行う。図2に示すように、マイコン3は、インジェクタ2を駆動している期間は、FET13をオフして断線検出を行わず、インジェクタ2を駆動していない期間にFET13をオンして断線を検出する。尚、図2では、図1でドレイン線8に「A」を付し、信号線14に「B」を付していることに対応させて、ドレイン線8を「A部」と称し、信号線14を「B部」と称している。 Next, the operation of this embodiment will be described. The microcomputer 3 controls the on / off of the FET 13 while driving the injector 2, and detects the disconnection of the drain wire 8. As shown in FIG. 2, the microcomputer 3 turns off the FET 13 to detect disconnection during the period when the injector 2 is being driven, and turns on the FET 13 to detect the disconnection while the injector 2 is not being driven. .. In FIG. 2, the drain line 8 is referred to as “part A” in correspondence with the fact that “A” is attached to the drain line 8 and “B” is attached to the signal line 14 in FIG. The line 14 is referred to as "part B".

ドレイン線8及び信号線14が健全であれば、FET13をターンオンすると、充電状態にあるコンデンサ10の電荷は、ダイオード11,FET13,信号線14及びドレイン線8を介してECU1の回路グランドに放電される。また、電源VDDから抵抗素子9を介して、上記と同様の経路で電流が流れる。この時、入力ポートINはローレベルになるので、マイコン3は「正常」と判定する。一方、ドレイン線8及び信号線14の何れか一方が断線していれば、コンデンサ10の電荷は放電されないので入力ポートINはハイレベルとなる。これにより、マイコン3は「異常」と判定する。 If the drain line 8 and the signal line 14 are sound, when the FET 13 is turned on, the electric charge of the capacitor 10 in the charged state is discharged to the circuit ground of the ECU 1 via the diode 11, the FET 13, the signal line 14 and the drain line 8. To. Further, a current flows from the power supply VDD through the resistance element 9 in the same path as described above. At this time, since the input port IN becomes low level, the microcomputer 3 determines that it is "normal". On the other hand, if either the drain line 8 or the signal line 14 is disconnected, the charge of the capacitor 10 is not discharged, so that the input port IN becomes a high level. As a result, the microcomputer 3 determines that it is "abnormal".

図3は、信号線14又はドレイン線8の断線の有無に応じて、マイコン3がどのようなタイミングで断線を判定するかを示している。図中の「N」は、マイコン3が「正常」と判定するタイミングを示し、図中の「AB」は、マイコン3が「異常」と判定するタイミングを示している。 FIG. 3 shows at what timing the microcomputer 3 determines the disconnection depending on the presence or absence of the disconnection of the signal line 14 or the drain wire 8. “N” in the figure indicates the timing at which the microcomputer 3 determines “normal”, and “AB” in the figure indicates the timing at which the microcomputer 3 determines “abnormal”.

以上のように本実施形態によれば、ECU1は、インジェクタ2に駆動信号を出力するために使用されるシールド線5を、ドレイン線8を介して回路グランドに接地するための端子T3を備える。マイコン3は、電源VDDと端子T3ドレイン線8との間に抵抗素子9と共に直列接続されるFET13のオンオフを切り替えて、ドレイン線8の断線を検出する。このように構成すれば、マイコン3は、シールド線5のシールド効果が低下しても影響がない期間にドレイン線8の断線の有無を検出できる。 As described above, according to the present embodiment, the ECU 1 includes a terminal T3 for grounding the shield wire 5 used for outputting the drive signal to the injector 2 to the circuit ground via the drain wire 8. The microcomputer 3 switches on / off of the FET 13 connected in series with the resistance element 9 between the power supply VDD and the terminal T3 drain wire 8 to detect the disconnection of the drain wire 8. With this configuration, the microcomputer 3 can detect the presence or absence of disconnection of the drain wire 8 during a period in which there is no effect even if the shielding effect of the shield wire 5 is reduced.

具体的には、マイコン3は、駆動信号を出力していない期間にFET13をオンすることで、抵抗素子9に流れる電流に基づいて断線を検出する。すなわち、駆動信号を出力していない期間はシールド線5のシールド効果が低下しても影響がないので、ノイズの発生を抑制しつつドレイン線8の断線の有無を検出できる。 Specifically, the microcomputer 3 turns on the FET 13 during the period when the drive signal is not output, and detects the disconnection based on the current flowing through the resistance element 9. That is, since there is no effect even if the shielding effect of the shield wire 5 is reduced during the period when the drive signal is not output, it is possible to detect the presence or absence of disconnection of the drain wire 8 while suppressing the generation of noise.

(第2実施形態)
以下、第1実施形態と同一部分には同一符号を付して説明を省略し、異なる部分について説明する。図4に示すように、第2実施形態のECU21は、マイコン3に替わるマイコン22を備えている。マイコン22は、FET13のゲートに与えるゲート駆動信号を、出力ポートOUT2に替えて、出力ポートOUT1より出力するインジェクタの駆動信号をNOTゲート23により反転させた信号として与える。
(Second Embodiment)
Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, description thereof will be omitted, and different parts will be described. As shown in FIG. 4, the ECU 21 of the second embodiment includes a microcomputer 22 that replaces the microcomputer 3. The microcomputer 22 replaces the gate drive signal given to the gate of the FET 13 with the output port OUT2, and gives the drive signal of the injector output from the output port OUT1 as a signal inverted by the NOT gate 23.

これにより、図5に示すように、マイコン22が出力する駆動信号TQ1が、インアクティブレベルであるローレベルになった際にFET13がオンされて、ドレイン線8の断線検出が行われる。したがって、マイコン22の出力ポートの使用数を削減できる。 As a result, as shown in FIG. 5, when the drive signal TQ1 output by the microcomputer 22 reaches the low level, which is the inactive level, the FET 13 is turned on and the disconnection of the drain line 8 is detected. Therefore, the number of output ports used by the microcomputer 22 can be reduced.

(第3実施形態)
図6に示すように、第3実施形態のECU31は、2つのインジェクタ2(1),2(2)を並行して駆動する。同図では、インジェクタ2(1)を駆動する構成の符号に(1)を付し、インジェクタ2(2)を駆動する構成の符号に(2)を付して示している。そして、マイコン32がインジェクタ2(1)に出力する駆動信号TQ1は、FET13(2)のゲート駆動信号として与えられている。また、マイコン32がインジェクタ2(2)に出力する駆動信号TQ2は、FET13(1)のゲート駆動信号として与えられている。
(Third Embodiment)
As shown in FIG. 6, the ECU 31 of the third embodiment drives two injectors 2 (1) and 2 (2) in parallel. In the figure, the code of the configuration for driving the injector 2 (1) is indicated by (1), and the code of the configuration for driving the injector 2 (2) is indicated by (2). The drive signal TQ1 output by the microcomputer 32 to the injector 2 (1) is given as a gate drive signal of the FET 13 (2). Further, the drive signal TQ2 output by the microcomputer 32 to the injector 2 (2) is given as a gate drive signal of the FET 13 (1).

そして、図7に示すように、マイコン32が出力する駆動信号TQ2がアクティブレベルであるハイレベルになった際にFET13(1)がオンされて、ドレイン線8(1)の断線検出が行われる。また、図8に示すように、マイコン32が出力する駆動信号TQ1がハイレベルになった際にFET13(2)がオンされて、ドレイン線8(2)の断線検出が行われる。 Then, as shown in FIG. 7, when the drive signal TQ2 output by the microcomputer 32 reaches the high level which is the active level, the FET 13 (1) is turned on and the disconnection detection of the drain line 8 (1) is performed. .. Further, as shown in FIG. 8, when the drive signal TQ1 output by the microcomputer 32 reaches a high level, the FET 13 (2) is turned on to detect the disconnection of the drain wire 8 (2).

(その他の実施形態)
スイッチング素子はNチャネルMOSFETに限らない。
断線検出部と、信号出力部とを個別に構成しても良い。
第3実施形態を、3つ以上のインジェクタ2を並行して駆動する構成に拡張しても良い。
インジェクタ以外の誘導性負荷を駆動対象としても良い。
車両に搭載されるものに限らない。
(Other embodiments)
The switching element is not limited to the N-channel MOSFET.
The disconnection detection unit and the signal output unit may be individually configured.
The third embodiment may be extended to a configuration in which three or more injectors 2 are driven in parallel.
An inductive load other than the injector may be the driving target.
It is not limited to those mounted on vehicles.

本開示は、実施例に準拠して記述されたが、本開示は当該実施例や構造に限定されるものではないと理解される。本開示は、様々な変形例や均等範囲内の変形をも包含する。加えて、様々な組み合わせや形態、さらには、それらに一要素のみ、それ以上、あるいはそれ以下、を含む他の組み合わせや形態をも、本開示の範疇や思想範囲に入るものである。 Although the present disclosure has been described in accordance with the examples, it is understood that the present disclosure is not limited to the examples or structures. The present disclosure also includes various modifications and modifications within an equal range. In addition, various combinations and forms, as well as other combinations and forms that include only one element, more, or less, are also within the scope of the present disclosure.

図面中、1はECU、2はインジェクタ、3はマイクロコンピュータ、5はシールド線、7はシールド、8はドレイン線、9は抵抗素子、13はNチャネルMOSFETを示す。 In the drawings, 1 is an ECU, 2 is an injector, 3 is a microcomputer, 5 is a shield wire, 7 is a shield, 8 is a drain wire, 9 is a resistance element, and 13 is an N-channel MOSFET.

Claims (4)

誘導性負荷(2)に駆動信号を出力するために使用されるシールド線(5)を、ドレイン線(8)を介してグランドに接地するための接地端子(T3)と、
電源と前記接地端子との間に接続される抵抗素子(9)及びスイッチング素子(13)の直列回路と、
前記スイッチング素子のオンオフを切り替えることで、前記ドレイン線の断線を検出する断線検出部(3,22,32,40)とを備える電子制御装置。
A ground terminal (T3) for grounding the shield wire (5) used to output a drive signal to the inductive load (2) to the ground via the drain wire (8),
A series circuit of a resistance element (9) and a switching element (13) connected between the power supply and the ground terminal,
An electronic control unit including a disconnection detection unit (3, 22, 32, 40) that detects a disconnection of the drain wire by switching the switching element on and off.
前記駆動信号を出力する信号出力部(3,22,23,32,40)を備え、
前記断線検出部は、前記信号出力部が前記駆動信号を出力していない期間に前記スイッチング素子をオンすることで、前記断線を検出する請求項1記載の電子制御装置。
A signal output unit (3,22,23,32,40) for outputting the drive signal is provided.
The electronic control unit according to claim 1, wherein the disconnection detection unit detects the disconnection by turning on the switching element during a period in which the signal output unit does not output the drive signal.
前記断線検出部(22,23)は、前記スイッチング素子のオンオフを切り替える信号を、前記駆動信号のレベルを反転させて生成する請求項2記載の電子制御装置。 The electronic control unit according to claim 2, wherein the disconnection detection unit (22, 23) generates a signal for switching on / off of the switching element by inverting the level of the drive signal. 前記断線検出部は、前記抵抗素子に流れる電流に基づいて前記断線を検出する請求項1から3の何れか一項に記載の電子制御装置。 The electronic control unit according to any one of claims 1 to 3, wherein the disconnection detection unit detects the disconnection based on the current flowing through the resistance element.
JP2019034297A 2019-02-27 2019-02-27 electronic controller Active JP7172731B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019034297A JP7172731B2 (en) 2019-02-27 2019-02-27 electronic controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019034297A JP7172731B2 (en) 2019-02-27 2019-02-27 electronic controller

Publications (2)

Publication Number Publication Date
JP2020139787A true JP2020139787A (en) 2020-09-03
JP7172731B2 JP7172731B2 (en) 2022-11-16

Family

ID=72264809

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019034297A Active JP7172731B2 (en) 2019-02-27 2019-02-27 electronic controller

Country Status (1)

Country Link
JP (1) JP7172731B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11881868B2 (en) 2021-09-09 2024-01-23 Mitsuba Corporation Control system, disconnection detection method, and non-transitory computer-readable medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62245162A (en) * 1986-04-17 1987-10-26 Toshiba Corp Abnormality detector for cable
JPH04335170A (en) * 1991-05-09 1992-11-24 Fujikura Ltd Inspection method and device of wire harness
JP2009175092A (en) * 2008-01-28 2009-08-06 Denso Corp Disconnection detector
JP2011159548A (en) * 2010-02-02 2011-08-18 Fuji Xerox Co Ltd State detection device and program
JP2015121418A (en) * 2013-12-20 2015-07-02 株式会社デンソー Abnormality detection device for electric load driving apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62245162A (en) * 1986-04-17 1987-10-26 Toshiba Corp Abnormality detector for cable
JPH04335170A (en) * 1991-05-09 1992-11-24 Fujikura Ltd Inspection method and device of wire harness
JP2009175092A (en) * 2008-01-28 2009-08-06 Denso Corp Disconnection detector
JP2011159548A (en) * 2010-02-02 2011-08-18 Fuji Xerox Co Ltd State detection device and program
JP2015121418A (en) * 2013-12-20 2015-07-02 株式会社デンソー Abnormality detection device for electric load driving apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11881868B2 (en) 2021-09-09 2024-01-23 Mitsuba Corporation Control system, disconnection detection method, and non-transitory computer-readable medium

Also Published As

Publication number Publication date
JP7172731B2 (en) 2022-11-16

Similar Documents

Publication Publication Date Title
CN100570786C (en) Electrical capacitance proximity sensor
US7267115B2 (en) Ignition apparatus for an internal combustion engine
US9300207B2 (en) Switching control circuit and control method thereof
US9722600B2 (en) Driving circuit of switching device for electric power control
US20140118872A1 (en) Protection circuit and gate driving circuit for semiconductor switching device
US10088882B2 (en) Electronic control unit having multiple power supply routes for microcomputer core
US20140327450A1 (en) Device and method for testing the state of the connection of a load connected to a connection point
JP2007010563A (en) Abnormality detection device of inductive load
JP2020139787A (en) Electronic controller
WO2017090352A1 (en) Electronic device provided with secondary failure preventing circuit
JP6387888B2 (en) Inductive load drive
JP5941718B2 (en) Signal processing circuit, in-vehicle electronic control device, and mounting method of signal processing circuit in in-vehicle electronic control device
JP6461561B2 (en) Igniters and vehicles
JP2006129595A (en) Switching circuit
JP6014618B2 (en) Solenoid valve drive circuit
WO2019044573A1 (en) Connection unit and power source system
JP2010043916A (en) Apparatus for detecting insulation in non-grounded circuit
JP2008172901A (en) Power supply unit
JP6326921B2 (en) Overvoltage protection circuit
WO2020209164A1 (en) Current sensing circuit
JP2014216703A (en) Load drive circuit
KR101629580B1 (en) Semiconductor apparatus with open detecting function
JP2004282959A (en) Drive device of voltage-control type drive element
JP2017036938A (en) Voltage detection circuit
JP2004294404A (en) Disconnection detecting circuit

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210716

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20220719

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220726

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20220823

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: 20221004

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20221017

R151 Written notification of patent or utility model registration

Ref document number: 7172731

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151