JPS5885340A - Failure detector of controller of internal combustion engine mounted on vehicle - Google Patents
Failure detector of controller of internal combustion engine mounted on vehicleInfo
- Publication number
- JPS5885340A JPS5885340A JP18182081A JP18182081A JPS5885340A JP S5885340 A JPS5885340 A JP S5885340A JP 18182081 A JP18182081 A JP 18182081A JP 18182081 A JP18182081 A JP 18182081A JP S5885340 A JPS5885340 A JP S5885340A
- Authority
- JP
- Japan
- Prior art keywords
- output
- harness
- signal line
- comparator
- voltage
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は車載用内燃機関の制御装置の故障検出装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a failure detection device for a control device for a vehicle-mounted internal combustion engine.
近時、車載用内燃機関においては、燃料噴射、点火時期
、アイドル回転数等の制御がマイクロコンピュータを用
いた単一の制御回路によって集中的に行なわれている。BACKGROUND OF THE INVENTION Recently, in a vehicle internal combustion engine, control of fuel injection, ignition timing, idling speed, etc. is performed centrally by a single control circuit using a microcomputer.
制御回路は吸入空気量、冷却水温等の各種のエンジンパ
ラメータに基づいて各種機関制御量を演算して電磁弁や
りレースイノチ等を駆動するようになっている。このた
め、制御回路にはエンジンパラメータを検出するセンサ
及び電磁弁等の７クチーエータが７・−ネスを介して各
々接続されている。The control circuit calculates various engine control amounts based on various engine parameters such as intake air amount and cooling water temperature to drive solenoid valves, race pins, etc. For this purpose, seven actuators such as sensors for detecting engine parameters and solenoid valves are connected to the control circuit via seven wires.
故障検出装置は、かかるハーネスの電圧レベルが通常の
電圧レベル範囲外のときそのノ・−ネスに接続されたセ
ンサ、アクチュエータ或いは制御回路の出力部の故障と
判断して故障箇所に対応する警報を発生するものである
。When the voltage level of the harness is outside the normal voltage level range, the failure detection device determines that there is a failure in the sensor, actuator, or output section of the control circuit connected to the harness, and issues an alarm corresponding to the failure location. It is something that occurs.
しかしながら、従来の故障検出装置は、制御回路のマイ
クロコンピータを利用Ｃて機関制御量の演算時間の合間
に順次ノ・−ネスの電圧しＲルを知らべるものであった
。このため、短時間に発生−する間欠故障や同時に発生
した複数の故障の検出ができないという問題点があった
。However, the conventional failure detection device utilizes a microcomputer in the control circuit to sequentially detect the voltage and voltage of the engine control variable during calculation time. Therefore, there is a problem in that it is not possible to detect intermittent failures that occur in a short period of time or multiple failures that occur simultaneously.
そこで、本発明の目的は、上記問題点を解決して短時間
に発生する間欠故障や同時に発生した複数の故障の検出
をし得る故障検出装置を提供することである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a failure detection device capable of solving the above-mentioned problems and detecting intermittent failures that occur in a short period of time or multiple failures that occur simultaneously.
本発明による故障検出装置は、ハーネス等の信号ライン
の電圧レベルを所定電圧と比較した比較出力信号に応じ
た所定状態をマイクロコンピータが読み取るまで保持す
るようになっている。The failure detection device according to the present invention is configured to maintain a predetermined state according to a comparison output signal obtained by comparing the voltage level of a signal line such as a harness with a predetermined voltage until a microcomputer reads it.
以下、本発明の実施例を第１図及び第２図釜参照して詳
細に説明する。Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.
第１図は本発明による故障検出装置のブロック図である
。第１図において、制御回路１は機関の燃料噴射、点火
時期、アイドル回転数等の制御量を演算する回路であり
、その入出力端にはノ・−ネス２１ないし２ｎを各々介
してセンサ、ア久チューエータ（図示せず）等が接続さ
れている。ノ・−ネス２１には信号ライン電圧を検出す
るノ・−ネス３．を介して出力遅延機能を有する比較器
４１が接続されている。また他のハーネス２２ないし２
ユにも同様にノ１−ネス３２ないし３ｒＬを各々介して
比較器４２ないし４ｒＬが接続されている。比較器２１
ないし２ｒＬには所定電圧Ｖ□ｆ１ないしｖｒｅｆｎが
各々供給され、また比較器４１ないし４ｎの出力端には
Ｒ８−ＦＦ （フリツプフロツプ）５．ないし５．の各
↓ット端が各々接続されている。Ｒ，８−ＦＦ５．ない
し５ｒＬの各出力端及びリセット端には入出力インター
フェース６が接続されてイル。入出力インターフェース
６はマイクロプロセッサ７、クロックノクルス発生器８
及びメモリー９と共にマイクロコンピュータ１０をなし
ている。FIG. 1 is a block diagram of a failure detection device according to the present invention. In FIG. 1, a control circuit 1 is a circuit that calculates control variables such as fuel injection, ignition timing, and idle speed of the engine, and has sensors and sensors connected to its input and output terminals via nodes 21 to 2n, respectively. An Aku tuator (not shown), etc. is connected. The no.-nes 21 includes a no-nes 3 for detecting the signal line voltage. A comparator 41 having an output delay function is connected via. Also, other harnesses 22 or 2
Similarly, comparators 42 to 4rL are connected to nodes 32 to 3rL, respectively. Comparator 21
Predetermined voltages V□f1 to vrefn are supplied to the comparators 41 to 2rL, respectively, and R8-FF (flip-flop) 5. or 5. The ends of each ↓ are connected to each other. R,8-FF5. An input/output interface 6 is connected to each output terminal and reset terminal of 5rL to 5rL. The input/output interface 6 includes a microprocessor 7 and a clock noculus generator 8.
Together with the memory 9 and the memory 9, it constitutes a microcomputer 10.
また入出力インターフェース６には発光ダイオードから
なる表示器１１が接続されている。Further, a display 11 made of a light emitting diode is connected to the input/output interface 6.
上記構成の本発明による故障検出装置において、例えば
、ハーネス２１が機関冷却水温を検出するセンサの信号
ラインであシかつその電圧レベルが通常１．電圧ｖｒｅ
ｆ、より大であるとすると、比較器４１の出力レイルは
通常高レベルになっている。ところがセンサが故障した
シ或いはノ・−ネス２１が断線すると比較器４１にバー
木遣３１を介して供給される電圧レベルが所定電圧ｖｒ
ｇ ｆ １以下となシ、比較器４゜の出力レベルは所
定時間後に低レベルになる。他の比較器４２ないし軸も
同様に動作する。In the failure detection device according to the present invention having the above configuration, for example, the harness 21 is a signal line of a sensor for detecting engine cooling water temperature, and the voltage level thereof is normally 1. voltage vre
f, the output rail of comparator 41 is normally at a high level. However, if the sensor malfunctions or the node 21 is disconnected, the voltage level supplied to the comparator 41 via the bar 31 will be lower than the predetermined voltage vr.
If g f is less than 1, the output level of the comparator 4° becomes low level after a predetermined time. The other comparators 42 or axes operate similarly.
Ｒ８−ＦＦ５１ないし５ｎは各リセット端にリセット信
号が供給されるまで比較器４．ないし軸の出力が低レベ
ルに反転した場合にその低レベルに対応した所定状態°
′０”を保持して出力端に出力する。また比較器４．な
いし殊の出力が高レベルの場合には所定状態°゛１”を
出力端に出力する。R8-FF51 to 5n are used as comparators 4. to 5n until a reset signal is supplied to each reset terminal. or a predetermined state corresponding to the low level when the output of the axis is reversed to a low level °
It holds '0' and outputs it to the output terminal. Also, when the output of comparator 4 or a special one is at a high level, a predetermined state '1' is outputted to the output terminal.
次にマイクロコンピュータ１０の動作を第２図のフロー
図を参照して説明する。Next, the operation of the microcomputer 10 will be explained with reference to the flowchart shown in FIG.
マイクロコンピータ１０は、先ず、動作を開始する゛（
２１）と、クロックツぐルスに応じてＲ８−ＦＦ５゜な
いし５ｒＬを所定順序に従って例えば、０．５秒毎に選
択する（２２）。次に、選択したＲ、５−ＦＦの出力状
態を検出してデータとしく２３）、検出するとリセット
信号をそのＲ８−ＦＦのリセット端に供給する（２４）
。次いで、検出レベルが１”または′１”のどちらであ
るかを判断する（２５）。検出レベルが＠１”のときに
は次のＲ８−ＦＦを選択する時間まで待機する（２６）
。しかし、検出レベル゛が′０”のときには選択したＲ
、８−ＦＦに対応する表示器１１の発光ダイオードを点
燈せしめる表示信号を発生する（２７）。The microcomputer 10 first starts operating.
21), and R8-FF5° to 5rL are selected in a predetermined order according to the clock pulse, for example, every 0.5 seconds (22). Next, the output state of the selected R, 5-FF is detected and set as data 23), and when detected, a reset signal is supplied to the reset terminal of the R8-FF (24).
. Next, it is determined whether the detection level is 1'' or '1'' (25). When the detection level is @1”, wait until the time to select the next R8-FF (26)
. However, when the detection level is '0', the selected R
, 8-FF generates a display signal to turn on the light emitting diode of the display 11 corresponding to the FF (27).
そして行程（２６）に進み、選択時間が来ると次のＲ，
５−ＦＦを選択じて同様の動作を行なう。Then, proceed to step (26), and when the selection time comes, select the next R,
Select 5-FF and perform the same operation.
なお、表示器１１はハーネス２１〜２ｒＬの信号う１ン
に関係した故障箇所を発光ダイオードによって各々点燈
するようになっている。また表示器１１の他にブザーの
ような警報音を発生するようにしても良い。Incidentally, the display 11 is configured to light up each failure point related to the signal line of the harnesses 21 to 2rL using a light emitting diode. Further, in addition to the display 11, an alarm sound such as a buzzer may be generated.
このように、本発明による故障検出装置によれば、信号
ラインの電圧レベルに応じて故障を判定する比較手段の
出力を一旦保持するようにしたことにより、短時間に発
生する間欠故障や同時に発生した複数の故障を検出する
ことができる。また発光ダイオード等によシ故障箇所を
表示するため容易に修理箇所が発見できるのである。As described above, according to the fault detection device according to the present invention, by temporarily holding the output of the comparison means for determining faults according to the voltage level of the signal line, it is possible to detect intermittent faults that occur in a short time or simultaneous faults. multiple faults can be detected. Furthermore, since the failure location is displayed using a light emitting diode or the like, the repair location can be easily found.
第１図は本発明の故障検出装置の実施例を示すブロック
図、第２図は第１図のマイクロコンピュータの動作フロ
ー図である。
主要部分の符号の説明
■・・・制御回路
２１ないし２ｎ、３．ないし３ｒＬ・・・ハーネス４１
ないし輸・・・比較器
５、ないし５ｎ−Ｒ８−ＦＦ
１０…マイクロコンピユータ
出願人 日本電子機器株式会社
代理人 弁理士藤村元彦FIG. 1 is a block diagram showing an embodiment of the failure detection device of the present invention, and FIG. 2 is an operation flow diagram of the microcomputer shown in FIG. Explanation of symbols of main parts ■...Control circuits 21 to 2n, 3. or 3rL...Harness 41
Or import... Comparator 5, or 5n-R8-FF 10... Microcomputer Applicant Japan Electronics Co., Ltd. Agent Patent attorney Motohiko Fujimura
Claims (1)
応じて前記制御装置の故障箇所を検出する故障検出装置
であって、前記信号ライン毎に設けられその信号ライン
電圧と所定電圧とを比較する比較手段と、該各比較手段
の出力に各々接続されリセット信号が供給されるまで前
記比較手段の出力信号に応じた所定状態を保持して出力
する保持手段と、該各保持手段が所定状態にちるか否か
を順次検出して該各保持手段に前記リセット信号を供給
しかつ前記保持手段のいずれかが所定状態にない場合に
は警報を発生する検出警報発生手段とからなることを特
徴とする故障検出装置。A failure detection device for detecting a failure location of a control device of a vehicle internal combustion engine according to a voltage level of a signal line of the control device, the device being provided for each signal line and comparing the signal line voltage with a predetermined voltage. Comparing means; Holding means connected to the outputs of each of the comparing means to hold and output a predetermined state according to the output signal of the comparing means until a reset signal is supplied; and detection alarm generation means for sequentially detecting whether or not the holding means is in a predetermined state and supplying the reset signal to each of the holding means and generating an alarm if any of the holding means is not in a predetermined state. failure detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18182081A JPS5885340A (en) | 1981-11-13 | 1981-11-13 | Failure detector of controller of internal combustion engine mounted on vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18182081A JPS5885340A (en) | 1981-11-13 | 1981-11-13 | Failure detector of controller of internal combustion engine mounted on vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5885340A true JPS5885340A (en) | 1983-05-21 |
Family
ID=16107387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18182081A Pending JPS5885340A (en) | 1981-11-13 | 1981-11-13 | Failure detector of controller of internal combustion engine mounted on vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5885340A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61261643A (en) * | 1985-05-14 | 1986-11-19 | Suzuki Motor Co Ltd | Trouble detecting apparatus for controller for car |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54146346A (en) * | 1978-05-09 | 1979-11-15 | Nippon Denso Co Ltd | Fault diagnosing method and device for electronic controller for automobile |
| JPS55128641A (en) * | 1979-03-23 | 1980-10-04 | Nissan Motor Co Ltd | Controlling system for vehicle |
-
1981
- 1981-11-13 JP JP18182081A patent/JPS5885340A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54146346A (en) * | 1978-05-09 | 1979-11-15 | Nippon Denso Co Ltd | Fault diagnosing method and device for electronic controller for automobile |
| JPS55128641A (en) * | 1979-03-23 | 1980-10-04 | Nissan Motor Co Ltd | Controlling system for vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61261643A (en) * | 1985-05-14 | 1986-11-19 | Suzuki Motor Co Ltd | Trouble detecting apparatus for controller for car |
| US4764884A (en) * | 1985-05-14 | 1988-08-16 | Suzuki Jidosha Kogyo Kabushiki Kaisha | Failure detecting apparatus of a control unit for a vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH05147477A (en) | Vehicular control device | |
| JP4369872B2 (en) | Method and apparatus for diagnosing dynamic characteristics of lambda sensor used for lambda control for each cylinder | |
| JPH0480222B2 (en) | ||
| JPH06201496A (en) | Device for judging abnormality of atmospheric sensor | |
| JP3613028B2 (en) | Memory check device and check method | |
| JPH0196449A (en) | Valve controller for internal combustion engine | |
| US5186148A (en) | Abnormality detecting device for an automobile engine | |
| JPS5885340A (en) | Failure detector of controller of internal combustion engine mounted on vehicle | |
| US6768939B2 (en) | Method and device for checking the performance reliability of a timer | |
| GB2222701A (en) | Engine diagnosis | |
| JP2001304025A (en) | Self diagnostic method for fuel injection system | |
| JPS5928048A (en) | Self-diagnosis starting system in self diagnosing device for automobile engine control device | |
| JPS58158346A (en) | Detecting method for trouble of controller for internal-combustion engine | |
| KR100226289B1 (en) | Error judgement method of oxygen sensor | |
| KR100196352B1 (en) | Obstacle-check control method of car speed sensor installed in diesel engine vehicle | |
| JP2002132533A (en) | Control apparatus for vehicle having self-diagnostic feature and record medium | |
| JPH07116984B2 (en) | In-vehicle control device self-diagnosis device | |
| JPH0455180A (en) | Burglar preventing device for autocycle | |
| JPH0718367B2 (en) | O Bottom 2 Sensor failure diagnosis device | |
| KR100190876B1 (en) | Trouble shooting method of speed sensor in a car | |
| JPS62161038A (en) | Electronic controller for vehicle | |
| JP2002061535A (en) | Abnormality detecting device | |
| JPH028135B2 (en) | ||
| JPH0621793Y2 (en) | Abnormality detection circuit for vehicle ground | |
| KR100205902B1 (en) | Fault deciding method of speed sensor in a vehicle |