JPS61187045A - Controller of internal combustion engine - Google Patents
Controller of internal combustion engineInfo
- Publication number
- JPS61187045A JPS61187045A JP60026303A JP2630385A JPS61187045A JP S61187045 A JPS61187045 A JP S61187045A JP 60026303 A JP60026303 A JP 60026303A JP 2630385 A JP2630385 A JP 2630385A JP S61187045 A JPS61187045 A JP S61187045A
- Authority
- JP
- Japan
- Prior art keywords
- computer
- input
- auxiliary
- engine
- signal
- 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
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
Abstract
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
ンピュータ異常を検出する補助コンピュータの誤動作防
止に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application 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 an abnormality in an engine control computer.
機［制御用コンピュ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、バックアップ回路から
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、
機関制御用コンピュ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った。When an abnormality occurs in the control computer and its peripheral equipment, the diagnostic circuit detects it, outputs an alternative control signal from the backup circuit, and ensures the minimum possible run to the nearest repair shop. This method is known from Japanese Patent Publication No. 54-58110. However, when the diagnostic circuit is abnormal,
There was a drawback that there was a factor that could cause malfunctions when the engine control computer was operating normally.
本発明の目的は機関制御用コンピュ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 a failure in an engine control computer and prevents an auxiliary computer that performs alternative control from malfunctioning when an abnormality occurs.
本発明の特徴は、補助コンピュータが異常の時入力端子
が出力端子に代わっ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 in an abnormal state.
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−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。ＣＰ、Ｕ ４はプログラムが記憶さ
れているＲ ＯＭ （Ｒｅａｄ ０ｎｌｙ Ｍｅｍｏｌ
ｙ） ５、データの記憶や読み出しをするＲＡＭ （Ｒ
ａｎｄａｍ 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
接義されている。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１０１点
火制御装置１１、燃料ポンプ１２に制御信号が出力され
る。An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows the configuration of the present invention. The input/output device 3 captures the outputs of various detectors such as the air amount detector 1 that measures the amount of intake air into the engine, and the rotation detector 2 that detects the cylinder position and rotation connected to the rotating shaft of the engine. , based on these data,
The CPU 4 calculates and determines the amount of fuel supplied to the engine, the ignition timing, etc. CP, U4 is ROM (Read Only Memory) where the program is stored.
y) 5. RAM (R
andam Access Memory) 6, the input/output device 3, an address bus 7, and a data bus 8. The data regarding the fuel injection amount and ignition timing calculated by the CPU 4 connected in this way is outputted as a control signal from the input/output device 3 to the fuel supply device 101, ignition control device 11, and fuel pump 12 via the switching device 9. be done.
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ＣＰＵ４
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ッ
ト信号１３ｂが出力され、一定周期毎にＣＰＵ４と入出
力装置３にリセットがかかる。このリセット信号１３ｂ
はリセット信号バッファ１７を介してＣＰＵ１４にも入
力されており、常にリセット信号１３ｂの状態を監視し
ている。リセット信号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っていないた
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１０９点火制御装置１１．燃料
ポンプ１２への制御御信号を補助ＣＰＵＩ４からのもの
と切換える。On the other hand, to indicate that the CPU 4 is operating normally, the input/output device 3 outputs a CPU monitoring signal 13a whose state is inverted at regular intervals to the CPU monitoring device 13. If CPU4
is not operating normally and the state of the CPU monitoring signal 13a does not invert at regular intervals, the CPU monitoring device outputs a reset signal 13b, and the CPU 4 and input/output device 3 are reset at regular intervals. This reset signal 13b
is also input to the CPU 14 via 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 is not operating normally, so the auxiliary CPU 14 outputs the switching signal 14a, and the switching device 9 causes the fuel supply device 109, ignition control device 11. The control signal to the fuel pump 12 is switched to that from the auxiliary CPU I4.
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を回転信号バッファ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１
ｏへの制御信号を出力する。These control signals take in the rotation signal 2a which is the output signal from the rotation detector 2 via the rotation signal buffer 18, and based on this, the ignition control device 11 and the fuel supply device 1
Outputs a control signal to o.
また、始動時の燃料供給量を増やす為に始動スイッチ１
５の出力を始動信号バッファ１９を介して取り込み、始
動時の制御を行なう。In addition, in order to increase the amount of fuel supplied at the time of starting, the starting switch 1
The output of No. 5 is taken in through the starting signal buffer 19 to perform control at the time of starting.
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
となっている。もし、補助ＣＰＵ１４が故障し、リセッ
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った場合、Ｉｔ ＨＩＩか
′Ｌ″の信号が上記の信号に出力されてしまう。この時
、リセット信号バッファ１７等がなかったら、補助ＣＰ
Ｕ１４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１
１１ＨｇｈＩ＋のリセット信号］、３ｂが補助ＣＰＵ１
４によって“Ｌｏｗ”になったら、ＣＰＵ４にリセット
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 for the auxiliary CPU 14, and each input/output terminal can be switched by a program. If the auxiliary CPU 14 fails and the function of the terminal used as input for the reset signal 13b or rotation signal 2a is switched to output, the It HII or 'L' signal will be output as the above signal. At this time, if there is no reset signal buffer 17 etc., the auxiliary CP
The signal output from U14 is read into CPU4, which may cause a malfunction. In particular, usually 1
11HghI+ reset signal], 3b is auxiliary CPU1
4 becomes "Low", the CPU 4 will be reset, making it impossible to control the engine.
そこで、前記の様にリセット信号１３ｂ或いは他の入力
信号を取り込む場合にリセット信号バッファ１７の様な
バッファ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っても、ＣＰＵ４への
影響はなくなる。Therefore, by providing a buffer such as the reset signal buffer 17 when taking in the reset signal 13b or other input signals as described above, even if the auxiliary CPU 14 fails and its input terminal is switched to the output, it will not be sent to the CPU 4. The effect of will disappear.
また、バッファの代わりに第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、例えば始動スイッチ１
５がＯＮＬ、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、この装置のスレッシュ
ホールドレベル以上の電圧を確保しておけば信号がＨｉ
ｇｈ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”の出力となったとし
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、始動スイッチ１５がＯＦＦで、補助ＣＰＵ
１４から”Ｈｉｇｈ”が出力されたとしても保護抵抗２
２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のスレッシュ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。Also, it is an effective means to insert a resistor as shown in FIG. 2 instead of a buffer. That is, for example, starting switch 1
When 5 is ONL, the signal at that time is divided resistor 20.21
The signal enters the input/output device 3 with a partial voltage of
It can be considered as gh. At this time, even if the auxiliary CPU 14 fails and the input terminal changes to an output and becomes a "Low" output, the voltage level will hardly change due to the protection resistor 22. Conversely, when the start switch 15 is OFF, the auxiliary CPU
Even if “High” is output from 14, the protective resistor 2
2 and the dividing resistor 21 divide the signal. If the resistance value is selected so that this partial voltage value is below the threshold level of the input device 3, the influence on the CPU 4 will be eliminated.
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, the normal control is not affected at all, and a control device that does not malfunction can be realized.
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 malfunctions caused by the auxiliary CPU can be prevented, normal engine control can be performed even when the auxiliary CPU fails.
第１図は本発明の詳細な説明するブロック図、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、３−１．
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、１２・・・燃料ポンプ、１３・・・
ＣＰＵ監視装置、１４・・・補助ＣＰＵ、１５・・・始
動スイッチ、１６・・・トランジスタ、１７・・・リセ
ット信号バッファ、１８・・・回転信号バッファ、１９
・・・始動信号バッファ、２０゜２１・・・分割抵抗、
２２・・・保護抵抗、２ａ・・・回転信号、１３ａ・・
・ＣＰＵ監視信号、１３ｂ・・・リセット信号、１４ａ
・・・切換信号。FIG. 1 is a block diagram explaining the present invention in detail, and FIG. 2 is a diagram showing a specific embodiment of the present invention. 1... Air amount detector, 2... Rotation detector, 3-1.
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, 12...Fuel pump, 13...
CPU monitoring device, 14... Auxiliary CPU, 15... Start switch, 16... Transistor, 17... Reset signal buffer, 18... Rotation signal buffer, 19
...Starting signal buffer, 20゜21...dividing resistor,
22...Protection resistor, 2a...Rotation signal, 13a...
・CPU monitoring signal, 13b...Reset signal, 14a
...Switching signal.
Claims (1)
出力する手段と、機関に吸入する空気量を電圧に変換す
る手段と、少なくとも上記手段からの信号を取り込み、
機関への燃料供給量などを決定するコンピユータと、上
記コンピユータの指令を受け、少なくとも１つのアクチ
ユエータを制御する制御信号を出力する装置と、上記コ
ンピユータの異常を検出し、走行に必要な制御信号を出
力する補助コンピユータと、上記コンピユータと補助コ
ンピユータとの制御信号を切換える切換装置を有する内
燃機関の制御装置において、上記の補助コンピユータに
必要な入力信号をバツフアを通して取り込むことを特徴
とする内燃機関制御装置。1. means connected to the rotating shaft of the engine to output signals of cylinder position and rotation angle; means for converting the amount of air taken into the engine into voltage; and receiving signals from at least the above means;
a computer that determines the amount of fuel supplied to the engine, a device that receives commands from the computer and outputs a control signal that controls at least one actuator, and a device that detects abnormalities in the computer and outputs control signals necessary for running. An internal combustion engine control device comprising an output auxiliary computer and a switching device for switching control signals between the computer and the auxiliary computer, characterized in that input signals necessary for the auxiliary computer are taken in through a buffer. .
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 true JPS61187045A (en) | 1986-08-20 |
| JPH0621991B2 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008063967A (en) * | 2006-09-05 | 2008-03-21 | Auto Network Gijutsu Kenkyusho:Kk | Glow plug control device |
| CN102221819A (en) * | 2010-04-16 | 2011-10-19 | 西门子公司 | Connection device for field devices and method for operating same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8367850B2 (en) * | 2007-08-08 | 2013-02-05 | Universal Display Corporation | Benzo-fused thiophene or benzo-fused furan compounds comprising a triphenylene group |
Citations (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
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5955545A (en) * | 1982-09-25 | 1984-03-30 | Sharp Corp | Malfunction preventing system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008063967A (en) * | 2006-09-05 | 2008-03-21 | Auto Network Gijutsu Kenkyusho:Kk | Glow plug control device |
| 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 |
| CN102221819A (en) * | 2010-04-16 | 2011-10-19 | 西门子公司 | Connection device for field devices and method for operating same |
| CN102221819B (en) * | 2010-04-16 | 2015-07-29 | 西门子公司 | For the coupling arrangement of field apparatus and the method for running |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0621991B2 (en) | 1994-03-23 |
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