JPH01129133A - Self-diagnosis of control apparatus of engine - Google Patents
Self-diagnosis of control apparatus of engineInfo
- Publication number
- JPH01129133A JPH01129133A JP28735187A JP28735187A JPH01129133A JP H01129133 A JPH01129133 A JP H01129133A JP 28735187 A JP28735187 A JP 28735187A JP 28735187 A JP28735187 A JP 28735187A JP H01129133 A JPH01129133 A JP H01129133A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- egi
- control device
- turned
- data
- 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.)
- Pending
Links
- 238000004092 self-diagnosis Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims abstract description 3
- 230000005856 abnormality Effects 0.000 claims 1
- 238000003745 diagnosis Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 6
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Landscapes
- Testing Of Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は自動車用エンジン制御装置に係り、特に制御装
置の電源を断続するＥＧｉリレーとＥＧｉリレー故障時
に別経路により電源を供給するＥＧｉリレーバックアッ
プ回路を有する制御装置においてＥＧｉリレー故障時に
好適な自己診断に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine control device for an automobile, and particularly relates to an EGi relay that cuts off and cuts off power to a control device, and an EGi relay backup that supplies power through a separate route when the EGi relay fails. The present invention relates to self-diagnosis suitable for when an EGi relay fails in a control device having a circuit.
従来の装置は、ＥＧｉリレー故障の自己診断は行なわれ
ていなかった。Conventional devices do not perform self-diagnosis for EGi relay failures.
上記従来技術は、ＥＧｉリレー故障時の自己診断は考慮
されておらず、ＥＧｉリレーの故障検出はできない。ま
たは故障検出用の回路を組み込み部品数増加等の問題が
あった。The above conventional technology does not take self-diagnosis into consideration when an EGi relay fails, and cannot detect a failure of the EGi relay. Alternatively, there were problems such as incorporating a failure detection circuit and increasing the number of parts.
本発明の目的は、ソフト的にＥＧｉリレーの故障を検出
することにある。An object of the present invention is to detect a failure of an EGi relay using software.
ＩＧＮスイッチオフ後ある時間をおいてバックアップＲ
ＡＭに、あるデータＡを書き込み、他の処理終了後ＥＧ
ｉリレーをオフさせ１次回ＩＧＮスイッチオンされた場
合にまずバックアップＲＡＭのデータＡを読みに行き１
次にデータＢを書き込み、本来のエンジン制御を行なう
。ＩＧＮスイッチオフ時は上記と同じ様にしてデータＡ
を書き込む。Backup R after a certain time after IGN switch off
Write some data A to AM, and after completing other processing, write EG
When the i-relay is turned off and the IGN switch is turned on for the first time, it first reads data A in the backup RAM.
Next, data B is written and the original engine control is performed. When the IGN switch is off, data A is set in the same manner as above.
Write.
上記目、的は、ＥＧｉリレー故障時にＩＧＮスイッチと
連動して制御装置の電源が切れるためデータＡが書きこ
めず、ＩＧＮスイッチオン時に読むデータが異なり、Ｅ
Ｇｉリレー故障検出の目的を達成できる。The purpose of the above is that when the EGi relay fails, the power to the control device is turned off in conjunction with the IGN switch, so data A cannot be written, and the data read when the IGN switch is on is different.
The purpose of Gi relay failure detection can be achieved.
〔作用〕
ＥＧｉリレーは、制御装置内の駆動回路によす駆動され
る。駆動回路は、ＩＧＮスイッチオン信号と制御装置内
ロジック部からの信号の和によりＥＧｉリレーを駆動す
る。ＩＧＮスイッチがオフになってもロジック部からオ
ン信号が出力されていれば、駆動回路はＥＧｉリレーを
オンのまま保持する。ＥＧｉリレーバックアップ回路は
ＥＧｉリレー故障時にＩＧＮスイッチのオン、オフと連
動して制御装置に電源を供給する。バックアップＲＡＭ
はＥＧｉリレーのオン、オフとは無関係に常時電源が投
入されデータを保持する。[Operation] The EGi relay is driven by a drive circuit within the control device. The drive circuit drives the EGi relay by the sum of the IGN switch-on signal and the signal from the logic section within the control device. Even if the IGN switch is turned off, if an on signal is output from the logic section, the drive circuit keeps the EGi relay on. The EGi relay backup circuit supplies power to the control device in conjunction with the on/off of the IGN switch when the EGi relay fails. Backup RAM
is always powered on and retains data regardless of whether the EGi relay is on or off.
ロジック部は入力信号の取込み、駆動信号の出力等を行
なう。The logic section takes in input signals, outputs drive signals, etc.
正常時ＩＧＮスイッチがオフとなっても制御装置ロジッ
ク部からのオン信号によりＥＧｉリレーはオンのまま保
持される。ある時間後にバックアップＲＡＭにデータＡ
を書き込み他の処理を行なった後に制御装置ロジック部
からのオフ信号によりＥＧｉリレーをオフし制御装置の
電源を切断する。バックアップＲＡＭのデータは保持さ
れる。Even if the IGN switch is turned off during normal operation, the EGi relay is kept on by the on signal from the control device logic section. Data A will be stored in the backup RAM after a certain period of time.
After writing and performing other processing, the EGi relay is turned off by an off signal from the control device logic section, and the power to the control device is cut off. The data in the backup RAM is retained.
ＩＧＮスイッチオン信号によりＥＧｉリレーをオンし制
御装置ロジック部からもＥＧｉリレーオン信号を出力す
る。バックアップＲＡＭのデータＡを読む、次にデータ
Ｂを書き込む１本来の制御を行なう。ＩＧＮスイッチが
オフになったら上記と同様の処理を行なう。The EGi relay is turned on by the IGN switch-on signal, and the EGi relay-on signal is also output from the control device logic section. Performs the original control of reading data A in the backup RAM and then writing data B. When the IGN switch is turned off, the same process as above is performed.
ＥＧｉリレー故障時はＩＧＮスイッチオフと連動し制御
装置の電源が切断されるためＩＧＮスイッチオフ後の処
理が行なえず、データＡを書きこめず、データＢが残る
。したがってＥＧｉスイッチがオンされた時にデータＢ
が残っていればＥＧｉリレーの故障であると判断できる
。When the EGi relay fails, the power to the control device is cut off in conjunction with the IGN switch off, so processing after the IGN switch off cannot be performed, data A cannot be written, and data B remains. Therefore, when the EGi switch is turned on, data B
If remains, it can be determined that the EGi relay is malfunctioning.
以下、本発明の一実施例を第１図で説明する。 An embodiment of the present invention will be described below with reference to FIG.
１は制御装置に電源を供給するバッテリーである６１の
正極には制御装置への電源をオン、オフするＥＧｉリレ
ー２の片側接点と巻線とＩＧＮスイッチ３の片側と、装
置内バックアツプＲＡＭ用電源４と、その他必要部分に
接続される。1 is a battery that supplies power to the control device.The positive terminal of 61 is one side contact and winding of the EGi relay 2 that turns on and off the power to the control device, one side of the IGN switch 3, and one side of the back-up RAM in the device. It is connected to the power supply 4 and other necessary parts.
ＥＧｉリレー２の反対側接点はロジック部の電源回路９
及び各部回路とＥＧｉリレーバックアップ回路５（本実
施例ではダイオードカソード側）に接続される。ＩＧＮ
スイッチ３の反対側はＥＧｉリレーバックアップ回路５
（本実施例ではダイオード、アノード側）の片側とＥＧ
ｉリレー駆動回路６の１つの入力端子とロジック部７の
ＩＧＮスイッチ入力端子に接続される。The contact on the opposite side of the EGi relay 2 is the power supply circuit 9 of the logic section.
It is connected to each circuit and the EGi relay backup circuit 5 (in this embodiment, the diode cathode side). IGN
The opposite side of switch 3 is EGi relay backup circuit 5
(in this example, the diode, anode side) and the EG
It is connected to one input terminal of the i-relay drive circuit 6 and an IGN switch input terminal of the logic section 7.
ＥＧｉリレー２の巻線の片側はＥＧｉリレー駆動回路６
の出力に接続される。One side of the winding of EGi relay 2 is connected to EGi relay drive circuit 6
connected to the output of
制御装置電源９からは制御装置内の各ロジック、及びバ
ックアップＲＡＭ８に接続され電源を供給する。The control device power supply 9 is connected to each logic in the control device and the backup RAM 8 to supply power.
バックアツプＲＡＭ用電源４からはバックアップＲＡＭ
８に制御装置電源９との和となる様構成される。Backup RAM from power supply 4 for backup RAM
8 and a control device power source 9.
次に第２図のフローチャートで動作を説明する。Next, the operation will be explained with reference to the flowchart shown in FIG.
ＩＧＮスイッチがオンとなるとＥＧｉリレー駆動回路に
よりＥＧｉリレー２がオンとなる。またＩＧＮスイッチ
入力端子に入力された信号によりロジック部よりＥＧｉ
リレーオン信号が駆動回路に出力する。バックアツプＲ
ＡＭ内のデータＡを読みＡであれば、ＥＧｉリレーは正
常と判定し、ＢであればＥＧｉリレー異常と判定する。When the IGN switch is turned on, the EGi relay drive circuit turns on the EGi relay 2. In addition, the signal input to the IGN switch input terminal causes the logic section to
A relay-on signal is output to the drive circuit. Backup R
Data A in AM is read, and if it is A, it is determined that the EGi relay is normal, and if it is B, it is determined that the EGi relay is abnormal.
データＢを書き込む。通常制御を行なう、ＩＧＮスイッ
チがオフとなるとＥＧｉリレーオフの準備を行なう。あ
る時間（ＥＧｉリレーが完全にオフとなる時間以上）後
にバックアップＲＡＭにデータＡを書き込み、他の処理
が終了後ＥＧｉリレーオフ信号を駆動回路に出力する。Write data B. When the IGN switch, which performs normal control, is turned off, preparations are made to turn off the EGi relay. Data A is written into the backup RAM after a certain time (longer than the time when the EGi relay is completely turned off), and after other processing is completed, an EGi relay off signal is output to the drive circuit.
本実施例によればＥＧｉリレーが故障しデータの退避等
が行なえないことが確実に検出できる。According to this embodiment, it is possible to reliably detect that the EGi relay has failed and data cannot be saved.
本発明によれば、制御装置への電源の断続を行なうＥＧ
ｉリレーの故障を確実に検出することができる。According to the present invention, the EG that connects and disconnects power to the control device
Failures in i-relays can be reliably detected.
第１図は本発明の一実施例の構成図、第２図は検出のフ
ローチャートである。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart of detection.
Claims (2)
ｉリレーとＩＧＮスイツチと制御装置内ロジツク部から
の信号によりＥＧｉリレーを駆動する駆動回路とＩＧＮ
スイツチ信号と連動して上記ＥＧｉリレーとは別経路で
電源を供給するＥＧｉリレーバツクアツプ回路とＥＧｉ
リレーの断続にかかわらず常時通電されるバツクアツプ
ＲＡＭと全体の制御を行なうＣＰＵ等ロジツク部とプロ
グラムを格納するＲＯＭからなるエンジン制御装置にお
いて、ＥＧｉリレーが故障した場合にソフト的に異常を
検出する自己診断を設けたことを特徴とするエンジン制
御装置の自己診断。1. EG that cuts off the power supply to the engine control device
A drive circuit and IGN that drive the EGi relay by signals from the i relay, the IGN switch, and the logic section in the control device.
An EGi relay backup circuit and EGi
In an engine control device that consists of a backup RAM that is always energized regardless of whether the relay is on or off, a logic section such as a CPU that performs overall control, and a ROM that stores programs, there is a self-control system that detects an abnormality using software when the EGi relay fails. Self-diagnosis of an engine control device characterized by providing a diagnosis.
常時にはＩＧＮスイツチ信号がオフとなつた場合におい
ても制御装置内ロジツク部からのオン信号によりＥＧｉ
リレーがオンのまま継続されデータの退避等の処理を行
なつた後に上記ロジツク部からのオフ信号によりＥＧｉ
リレーはオフされるエンジン制御装置においてソフト的
にＥＧｉリレーの故障を検出する自己診断を設けたこと
を特徴とするエンジン制御装置の自己診断。2. In claim 1, even when the EGi relay is normal and the IGN switch signal is off, the EGi relay is turned off by the on signal from the logic section in the control device.
After the relay remains on and processes such as data saving are performed, the EGi is turned off by the off signal from the logic section.
A self-diagnosis for an engine control device, characterized in that a self-diagnosis for detecting failure of an EGi relay by software is provided in the engine control device in which the relay is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28735187A JPH01129133A (en) | 1987-11-16 | 1987-11-16 | Self-diagnosis of control apparatus of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28735187A JPH01129133A (en) | 1987-11-16 | 1987-11-16 | Self-diagnosis of control apparatus of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01129133A true JPH01129133A (en) | 1989-05-22 |
Family
ID=17716242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28735187A Pending JPH01129133A (en) | 1987-11-16 | 1987-11-16 | Self-diagnosis of control apparatus of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01129133A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664125A (en) * | 2012-05-17 | 2012-09-12 | 许继集团有限公司 | Double high driving level-resistant magnetic latching relay driving circuit |
| JP2014048070A (en) * | 2012-08-29 | 2014-03-17 | Denso Corp | Electronic control device |
| JP2017056847A (en) * | 2015-09-17 | 2017-03-23 | 日野自動車株式会社 | Vehicular electronic control device |
-
1987
- 1987-11-16 JP JP28735187A patent/JPH01129133A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664125A (en) * | 2012-05-17 | 2012-09-12 | 许继集团有限公司 | Double high driving level-resistant magnetic latching relay driving circuit |
| JP2014048070A (en) * | 2012-08-29 | 2014-03-17 | Denso Corp | Electronic control device |
| JP2017056847A (en) * | 2015-09-17 | 2017-03-23 | 日野自動車株式会社 | Vehicular electronic control device |
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