JPH0621991B2 - Internal combustion engine controller - Google Patents
Internal combustion engine controllerInfo
- Publication number
- JPH0621991B2 JPH0621991B2 JP60026303A JP2630385A JPH0621991B2 JP H0621991 B2 JPH0621991 B2 JP H0621991B2 JP 60026303 A JP60026303 A JP 60026303A JP 2630385 A JP2630385 A JP 2630385A JP H0621991 B2 JPH0621991 B2 JP H0621991B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- cpu
- main computer
- reset signal
- reset
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は内燃機関の制御装置に係り、特に機関制御用コ
ンピユータ異常を検出する補助コンピユータの誤動作防
止に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an internal combustion engine, and more particularly to prevention of malfunction of an auxiliary computer that detects engine control computer abnormality.
機関制御用にコンピユータ及びその周辺装置に異常が生
じた時、それを診断回路で検出し、バツクアツプ回路か
ら代わりの制御信号を出力し、近くの修理工場まで最低
限の走行を確保する技術は特開昭54-58110号公報で公知
である。しかし、これでは診断回路が異常の時、機関制
御用コンピユータ正常動作時に誤動作を起こす要因があ
るという欠点があつた。When abnormality occurs in the computer and its peripherals for engine control, it is detected by the diagnostic circuit, the backup control circuit outputs the alternative control signal, and the technology to ensure the minimum travel to the nearest repair shop is special. It is known from Japanese Laid-Open Publication No. 54-58110. However, this has a drawback in that when the diagnostic circuit is abnormal, there is a factor that causes a malfunction during normal operation of the engine control computer.
本発明の目的は機関制御用コンピユータの故障を検出
し、代わりの制御を行なう補助コンピュータの異常時の
誤動作を防止した内燃機関制御装置を提供することにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide an internal combustion engine control device that detects malfunctions of an engine control computer and prevents malfunction of an auxiliary computer that performs alternative control when an abnormality occurs.
本発明の特徴は、補助コンピユータが異常の時入力端子
が出力端子に代わつた場合でも正常に動作することにあ
る。A feature of the present invention is that the auxiliary computer operates normally even when the input terminal is replaced with the output terminal when the auxiliary computer is abnormal.
以下、本発明の一実施例を図面を用いて説明する。第１
図は本発明の構成を示す。機関への吸入空気量を測る空
気量検出器１や、機関の回転軸に接続されている気筒位
置や回転を検出する回転検出器２などの各種検出器の出
力を入出力装置３で取り込み、これらのデータを基に、
ＣＰＵ４により、機関への燃料供給量や点火時期などを
計算し、決定する。ＣＰＵ４はプログラムが記憶されて
いるＲＯＭ(Read Only Memoly)５、データの記憶や読み
出しをするＲＡＭ(Randam Access Memoly)６及び、前記
入出力装置３とアドレスバス７、データバス８により接
続されている。この様に接続されたＣＰＵ４で計算され
た前記の燃料噴射量や点火時期に関するデータが入出力
装置３から切換装置９を介して燃料供給装置１０，点火
制御装置１１，燃料ポンプ１２に制御信号が出力され
る。一方、ＣＰＵ４が正常動作していることを示す為に
入出力装置３から一定周期で状態が反転するＣＰＵ監視
信号１３ａをＣＰＵ監視装置１３に出力する。もしＣＰ
Ｕ４が正常動作でなく、ＣＰＵ監視信号１３ａの状態が
一定周期毎に反転しない場合、ＣＰＵ監視装置からはリ
セツト信号１３ｂが出力され、一定周期毎にＣＰＵ４と
入出力装置３にリセツトがかかる。このリセツト信号１
３ｂはリセツト信号バツフア１７を介してＣＰＵ１４に
も入力されており、常にリセツト信号１３ｂの状態を監
視している。リセツト信号１３ｂが一定周期毎に反転し
ているとしたら、ＣＰＵ４は正常な動作を行なつていな
いため、補助ＣＰＵ１４は切換信号１４ａを出し、切換
装置９により、燃料供給装置１０，点火制御装置１１，
燃料ポンプ１２への制御信号を補助ＣＰＵ１４からのも
のと切換える。An embodiment of the present invention will be described below with reference to the drawings. First
The figure shows the configuration of the invention. The output of various detectors such as an air amount detector 1 for measuring the amount of intake air to the engine and a rotation detector 2 for detecting the position and rotation of a cylinder connected to the rotating shaft of the engine are taken in by the input / output device 3. Based on these data
The CPU 4 calculates and determines the fuel supply amount to the engine and the ignition timing. The CPU 4 is connected to a ROM (Read Only Memoly) 5 in which a program is stored, a RAM (Randam Access Memoly) 6 for storing and reading data, and the input / output device 3 by an address bus 7 and a data bus 8. . The data relating to the fuel injection amount and the ignition timing calculated by the CPU 4 connected in this way is transmitted from the input / output device 3 via the switching device 9 to the fuel supply device 10, the ignition control device 11 and the fuel pump 12 as control signals. Is output. On the other hand, in order to indicate that the CPU 4 is operating normally, the input / output device 3 outputs to the CPU monitoring device 13 a CPU monitoring signal 13a whose state is inverted at regular intervals. If CP
When U4 is not in normal operation and the state of the CPU monitoring signal 13a is not inverted every certain period, the CPU monitoring device outputs the reset signal 13b, and the CPU 4 and the input / output device 3 are reset every certain period. This reset signal 1
3b is also input to the CPU 14 through the reset signal buffer 17 and constantly monitors the state of the reset signal 13b. If the reset signal 13b is inverted at regular intervals, the CPU 4 does not operate normally, so the auxiliary CPU 14 outputs the switching signal 14a, and the switching device 9 causes the fuel supply device 10 and the ignition control device 11 to operate. ，
The control signal to the fuel pump 12 is switched to that from the auxiliary CPU 14.
それらの制御信号は回転検出器２からの出力信号である
回転信号２ａを回転信号バツフア１８を介して取り込
み、これを基準にして点火制御装置１１，燃料供給装置
１０への制御信号を出力する。また、始動時の燃料供給
量を増やす為に始動スイツチ１５の出力を始動信号バツ
フア１９を介して取り込み、始動時の制御を行なう。These control signals fetch the rotation signal 2a, which is the output signal from the rotation detector 2, through the rotation signal buffer 18, and output the control signals to the ignition control device 11 and the fuel supply device 10 with reference to this. Further, in order to increase the fuel supply amount at the time of starting, the output of the starting switch 15 is taken in through the starting signal buffer 19 and the control at the time of starting is performed.
補助ＣＰＵ１４には１チツプマイクロコンピユータが用
いられるが、各入出力端子は、プログラムで切換え可能
となつている。もし、補助CPU14が故障し、リセツト信
号１３ｂや回転信号２ａの入力として使用していた端子
の機能が出力に切り換わつた場合、“Ｈ”か“Ｌ”の信
号が上記の信号に出力されてしまう。この時、リセツト
信号バツフア１７等がなかつたら、補助ＣＰＵ14から出
力された信号がＣＰＵ４に読み込まれ、それが原因で誤
動作を起こす可能性がある。特に、通常“High”のリセ
ツト信号１３ｂが補助CPU14によつて“Ｌｏｗ”になつ
たら、ＣＰＵ４にリセツトがかかつてしまい、機関の制
御が不可能となる。A one-chip microcomputer is used as the auxiliary CPU 14, but each input / output terminal can be switched by a program. If the auxiliary CPU 14 fails and the function of the terminal used as the input of the reset signal 13b or the rotation signal 2a is switched to the output, the "H" or "L" signal is output to the above signal. Will end up. At this time, if the reset signal buffer 17 or the like fails, the signal output from the auxiliary CPU 14 is read into the CPU 4, which may cause a malfunction. In particular, when the reset signal 13b, which is normally "High", goes "Low" by the auxiliary CPU 14, the CPU 4 is reset and control of the engine becomes impossible.
そこで、前記の様にリセツト信号１３ｂ或いは他の入力
信号を取り込む場合にリセツト信号バツフア１７の様な
バツフアを設けることにより、補助ＣＰＵ１４が故障
し、その入力端子が出力に切り換わつても、ＣＰＵ４へ
の影響はなくなる。Therefore, by providing a buffer such as the reset signal buffer 17 when the reset signal 13b or another input signal is taken in as described above, even if the auxiliary CPU 14 fails and its input terminal is switched to the output, the CPU 4 The effect on will disappear.
また、バツフアの代わりに第２図の様に抵抗を入れるの
も有効な手段である。すなわち、例えば始動スイツチ１
５がＯＮした時、その時の信号は分割抵抗２０，２１と
の分圧で入出力装置３に入り、この装置のスレツシユホ
ールドレベル以上の電圧を確保しておけば信号がHighと
見なせる。この時、補助ＣＰＵ１４が故障して入力端子
が出力に変わり、“Ｌｏｗ”の出力となつたとしても保
護抵抗２２により、電圧レベルはほとんど変わらない。
逆に、始動スイツチ１５がＯＦＦで、補助ＣＰＵ１４か
ら“High”が出力されたとしても保護抵抗２２と分割抵
抗２１とにより信号が分圧される。この分圧値が入力装
置３のスレツシユホールドレベル以下になる様に抵抗値
を選べば、CPU4への影響はなくなる。It is also an effective means to insert a resistor as shown in FIG. 2 instead of the buffer. That is, for example, the start switch 1
When 5 is turned on, the signal at that time enters the input / output device 3 by the voltage division with the dividing resistors 20 and 21, and if the voltage above the threshold level of this device is secured, the signal can be regarded as high. At this time, even if the auxiliary CPU 14 fails and the input terminal changes to the output, and the output becomes "Low", the voltage level hardly changes due to the protection resistor 22.
On the contrary, even if the start switch 15 is OFF and "High" is output from the auxiliary CPU 14, the signal is divided by the protection resistor 22 and the dividing resistor 21. If the resistance value is selected so that the divided voltage value is equal to or lower than the threshold level of the input device 3, the CPU 4 is not affected.
以上により、補助ＣＰＵ１４が故障しても通常制御には
何も影響を与えず、誤動作しない制御装置が可能とな
る。As described above, even if the auxiliary CPU 14 fails, it does not affect the normal control, and a control device that does not malfunction is possible.
本発明によれば、補助ＣＰＵによる誤動作を防止できる
ので、補助ＣＰＵが故障時も正常なエンジン制御を行な
うことが可能となる。According to the present invention, since the malfunction of the auxiliary CPU can be prevented, it is possible to perform normal engine control even when the auxiliary CPU has a failure.
第１図は本発明の概要を説明するブロツク図、第２図は
本発明の具体的実施例を示す図である。 １……空気量検出器、２……回転検出器、３……入出力
装置、４……ＣＰＵ、５……ＲＯＭ、６……ＲＡＭ、７
……アドレスバス、８……データバス、９……切換装
置、１０……燃料供給装置、１１……点火制御装置、１
２……燃料ポンプ、１３……ＣＰＵ監視装置、１４……
補助ＣＰＵ、１５……始動スイツチ、１６……トランジ
スタ、１７……リセツト信号バツフア、１８……回転信
号バツフア、１９……始動信号バツフア、２０，２１…
…分割抵抗、２２……保護抵抗、２ａ……回転信号、１
３ａ……ＣＰＵ監視信号、１３ｂ……リセツト信号、１
４ａ……切換信号。FIG. 1 is a block diagram for explaining the outline of the present invention, and FIG. 2 is a diagram showing a concrete embodiment of the present invention. 1 ... Air amount detector, 2 ... Rotation detector, 3 ... Input / output device, 4 ... CPU, 5 ... ROM, 6 ... RAM, 7
...... Address bus, 8 ...... Data bus, 9 ...... Switching device, 10 ...... Fuel supply device, 11 ...... Ignition control device, 1
2 ... Fuel pump, 13 ... CPU monitor, 14 ...
Auxiliary CPU, 15 ... Start switch, 16 ... Transistor, 17 ... Reset signal buffer, 18 ... Rotation signal buffer, 19 ... Start signal buffer, 20, 21 ...
… Split resistance, 22 …… Protection resistance, 2a …… Rotation signal, 1
3a ... CPU monitoring signal, 13b ... Reset signal, 1
4a ... Switching signal.
Claims (1)
号を出力する手段； (b). 前記機関に吸入される空気量に対応した信号を出
力する手段； (c). 少なくとも前記両手段からの信号を取り込み前記
機関の制御量を演算する主コンピュータ； (d). 前記主コンピュータで求められた前記制御量に基
づいて前記機関を制御するアクチュエータを制御するた
めの制御信号を出力する出力手段； (e). 前記主コンピュータの作動を監視し、前記主コン
ピュータに異常が生じると前記主コンピュータにリセッ
ト用の信号線を介してリセット信号を送出する監視手
段； (f). 前記リセット信号が前記リセット用の信号線に接
続されたリセット監視用の信号線を介して入力され、前
記リセット信号によっても前記主コンピュータが回復し
ない時には前記主コンピュータに代わって前記出力手段
に制御信号を送出する補助コンピュータ； (g). 前記監視手段と前記補助コンピュータを接続する
前記リセット監視用の信号線に配置され、前記リセット
信号の入力のみ許可するバッファ手段 とよりなる内燃機関制御装置。1. A means for outputting a signal of a rotation angle by connecting to a rotating shaft of an engine; (b). A means for outputting a signal corresponding to the amount of air taken into the engine; (c). A main computer that takes in signals from at least the both means and calculates a control amount of the engine; (d). A control for controlling an actuator that controls the engine based on the control amount obtained by the main computer. Output means for outputting a signal; (e). Monitoring means for monitoring the operation of the main computer, and for sending out a reset signal to the main computer through a reset signal line when an abnormality occurs in the main computer; ). When the reset signal is input through the reset monitoring signal line connected to the reset signal line and the main computer does not recover even by the reset signal, the main computer An auxiliary computer that sends a control signal to the output means instead of (g). A buffer means that is arranged on the reset monitoring signal line that connects the monitoring means and the auxiliary computer and that allows only the input of the reset signal. And an internal combustion engine controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60026303A JPH0621991B2 (en) | 1985-02-15 | 1985-02-15 | Internal combustion engine controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60026303A JPH0621991B2 (en) | 1985-02-15 | 1985-02-15 | Internal combustion engine controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61187045A JPS61187045A (en) | 1986-08-20 |
| JPH0621991B2 true JPH0621991B2 (en) | 1994-03-23 |
Family
ID=12189586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60026303A Expired - Lifetime JPH0621991B2 (en) | 1985-02-15 | 1985-02-15 | Internal combustion engine controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0621991B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017193579A (en) * | 2007-08-08 | 2017-10-26 | ユニバーサル ディスプレイ コーポレイション | Benzo-fused thiophene or benzo-fused furan compounds comprising triphenylene group |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4563360B2 (en) * | 2006-09-05 | 2010-10-13 | 株式会社オートネットワーク技術研究所 | Glow plug control device |
| EP2378380B1 (en) * | 2010-04-16 | 2012-12-12 | Siemens Aktiengesellschaft | Connection device for field devices and method for operating same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5955545A (en) * | 1982-09-25 | 1984-03-30 | Sharp Corp | Malfunction preventing system |
-
1985
- 1985-02-15 JP JP60026303A patent/JPH0621991B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017193579A (en) * | 2007-08-08 | 2017-10-26 | ユニバーサル ディスプレイ コーポレイション | Benzo-fused thiophene or benzo-fused furan compounds comprising triphenylene group |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61187045A (en) | 1986-08-20 |
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