JPS60206954A - Emergency stopping device for abnormal diesel-engine - Google Patents

Emergency stopping device for abnormal diesel-engine

Info

Publication number
JPS60206954A
JPS60206954A JP6415484A JP6415484A JPS60206954A JP S60206954 A JPS60206954 A JP S60206954A JP 6415484 A JP6415484 A JP 6415484A JP 6415484 A JP6415484 A JP 6415484A JP S60206954 A JPS60206954 A JP S60206954A
Authority
JP
Japan
Prior art keywords
rack
engine
rotational speed
sensor
rack position
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
Application number
JP6415484A
Other languages
Japanese (ja)
Inventor
Masa Shigemori
茂森 政
Tetsuo Koike
哲夫 小池
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.)
Hino Motors Ltd
Original Assignee
Hino Motors Ltd
Hino Jidosha Kogyo KK
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 Hino Motors Ltd, Hino Jidosha Kogyo KK filed Critical Hino Motors Ltd
Priority to JP6415484A priority Critical patent/JPS60206954A/en
Publication of JPS60206954A publication Critical patent/JPS60206954A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D31/00Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001Electric control of rotation speed
    • F02D31/007Electric control of rotation speed controlling fuel supply
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/22Safety or indicating devices for abnormal conditions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00Engines characterised by air compression and subsequent fuel addition
    • F02B3/06Engines characterised by air compression and subsequent fuel addition with compression ignition

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE:To prevent an engine from rotating at an excessively high rotational speed, by calculating a time-dependent variation in the position of a control rack under such a condition that the control amount of the control rack is insufficient when the speed of the engine reaches its rated rotational speed, and by determining that the engine is abnormal when the value of the variation is small. CONSTITUTION:An input means is composed of a rotational speed sensor 11 for detecting the rotational speed of an engine, an accelerator position sensor 12 and a rack position sensor 13 for detecting the position of a control rack for a fuel injection pump. Further, when a detected value from a rotational speed sensor 13 exceeds an engine rated rotational speed, an actual rack position detected by a rack position sensor 13 is compared with a desired rack position obtained from a memory means in accordance with a detected value from the pedal position sensor 12. When the deviation between both rack positions exceeds a predetermined value, an actual rack position after a predetermined time elapses is again compared with the above-mentioned actual rack position, and if the difference therebetween is below a regulated value the engine is determined as being abnormal, so that a control means 15 shuts off a fuel passage shut-off means 14.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、ディーゼル機関が機関の定格回転速度を越え
たときに機関を自動的に緊急停止F−させる装置に関す
る。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device that automatically brings a diesel engine to an emergency stop when the engine's rated rotational speed is exceeded.

[従来技術] 一般に機関の最高回転速度は、機関を破損させないため
に設計上から制限があり、必要以」二に上シフするのを
防ぐため定格回転速度が規定されている。
[Prior Art] Generally, the maximum rotational speed of an engine is limited by design in order to prevent damage to the engine, and a rated rotational speed is specified to prevent the engine from being shifted up more than necessary.

特にディーゼル機関では、回転速度が高くなると機関ト
ルクが負荷トルクを−に回り、負荷が低いときには僅か
にアクセルペダルを踏込んだだけで回Φl、速度か−1
−IL L続け、定格回転速度を越える場合かある。こ
の定格回転速度量]−の回転速度になることを未然に防
ぐため、従来よりガバナが用いられている。
Particularly in diesel engines, when the rotational speed increases, the engine torque turns to -1 compared to the load torque, and when the load is low, simply pressing the accelerator pedal slightly increases the speed by -1
-IL L may continue and exceed the rated rotation speed. In order to prevent the rotational speed from reaching the rated rotational speed amount]-, a governor has conventionally been used.

しかし燃料噴射ポンプのコントロールラックのステイン
ク現象1−によりガバナが機械的に故障したj4・1合
や、ディーゼル機関のエレクトロニクス化にイ゛rなっ
て電子ガバナを用いたときに、マイクロコンピュータの
制御プログラムの暴走、或いはマイクロコンピュータの
フェイル等か生じた場合には、ディーゼル機関が定格回
転速度以上の回転速度、すなわちオー/へ一ラン状態と
なることがあるため、このような異常時における機関の
緊急停止I装置か望まれていた。
However, when the governor mechanically malfunctions due to the fuel injection pump control rack stain phenomenon 1-1, or when an electronic governor is used due to the introduction of electronics in diesel engines, the microcomputer's control program If the engine runs out of control or the microcomputer fails, the diesel engine may reach a rotational speed higher than the rated rotational speed, that is, it may go into a one-run state. A stop I device was desired.

に償明のII的] 未発IJIは、i記安望を充足するもので、自動的に機
関の定格回転速度量」二の状態を感知して機関を緊急停
止(−させるディーゼル機関の異常時緊急停止I装置を
JR(共することを目的とする。
The unoccurred IJI satisfies the condition described in (i) and automatically detects the engine's rated rotational speed and causes an emergency stop (-) of the diesel engine. The purpose of the emergency stop I device is to be shared with JR.

[発明の構成] 第1図は本発明の構成を明小するための全体構成図であ
る。
[Configuration of the Invention] FIG. 1 is an overall configuration diagram for clarifying the configuration of the present invention.

本発明の装置は、デーイーゼル機関の回転速度を検出す
る回転センサ11と、機関のアクセルペダルのペダル位
置を検出するペダル位置センサ12と、機関の燃料噴射
ポンプのコントロールラックのラック位置を検出するラ
ンク位置上ンサ13とを入力手段とし、回転センサ11
の検出値が機関の定格回転速度以上であるとき、ラック
位置センサ13により検出される現時のラック位置と、
ペダル位置センサ12の検出(1riに応じて記憶手段
により記憶されるラックI」枠位置とを比較し、第一の
時刻におけるラック位置と」−記ラツク目標位置との差
が所足;■1−以−にであるとき、史に所定1111間
後の第二の時刻におけるラック位置を検出して、第一の
時刻におけるラック位置と第二の時刻におけるラック位
置とを比較し、その差が規定値以下であるとき、燃料流
路を遮断するように燃料流路開閉手段14を制御手段1
5により制御するものである。
The device of the present invention includes a rotation sensor 11 that detects the rotational speed of a diesel engine, a pedal position sensor 12 that detects the pedal position of an accelerator pedal of the engine, and a rack position of a control rack of a fuel injection pump of the engine. The upper rank position sensor 13 is used as an input means, and the rotation sensor 11
When the detected value of is equal to or higher than the rated rotational speed of the engine, the current rack position detected by the rack position sensor 13;
Detection of the pedal position sensor 12 (1ri) Compare the rack I frame position stored by the storage means according to 1ri, and find the difference between the rack position at the first time and the rack target position; ■1 - In the above case, the rack position at a second time after a predetermined 1111 intervals in the history is detected, the rack position at the first time and the rack position at the second time are compared, and the difference is determined. The control means 1 controls the fuel passage opening/closing means 14 so as to shut off the fuel passage when the value is below a specified value.
5.

[実施例] 次に本発明の実施例を図面に基づいて詳しく説り]1す
る。
[Example] Next, an example of the present invention will be explained in detail based on the drawings]1.

第2図に示すように、ディーゼル機関lOは、4投関の
回転速度を電気信号として検出する回転センサ11と、
機関のアクセルペダル16のペダル位置を電気信号とし
て検出するペダル位置センサ12と、機関の燃料噴射ポ
ンプ17のコントロールランク18のラック位置を電気
信号として検出するラック位置センサ13とを備える。
As shown in FIG. 2, the diesel engine IO includes a rotation sensor 11 that detects the rotational speed of four inputs as an electric signal,
It includes a pedal position sensor 12 that detects the pedal position of an accelerator pedal 16 of the engine as an electrical signal, and a rack position sensor 13 that detects the rack position of a control rank 18 of a fuel injection pump 17 of the engine as an electrical signal.

これらのセンサ11−13からの各検出出力は、AD変
換器21を介してマイクロコンピュータ15の人力イン
タフェース22に導かれる。この人力インタフェース2
2は、これらの′1E気信号を所定の情報信号レベルに
変換し、CPU23に4妾続される。CPU23にはR
OM24が接続される。このROM24には、アクセル
ペダル16のペタル位;rグに応じて燃料噴射ポンプ1
7の燃料噴用条ヂ1を最適化するコントロールラック1
8のラック口栓位置が記憶される。具体的にはガへす2
5がアクセルペダル16の変位に応じて正常に作動する
ときのコントロールラック18のラック位置(目標値)
が予めデータテーブルの形で記憶されている。CPU2
3の出力は、出力インタフェース26及び駆動回路27
を介して電磁弁28に接続される。この電磁弁28は燃
料タンク30とフィードポンプ31とを連結する燃料供
給パイプ32に介装される。33は燃料フィルタ、34
はタイマ、35は噴射ノズルである。
Each detection output from these sensors 11-13 is guided to the human power interface 22 of the microcomputer 15 via the AD converter 21. This human interface 2
2 converts these '1E signals to a predetermined information signal level, which is then connected to the CPU 23. R for CPU23
OM24 is connected. This ROM 24 stores fuel injection pump 1 according to the pedal position of the accelerator pedal 16;
Control rack 1 that optimizes the fuel injection line 1 of 7
8 rack plug positions are stored. Specifically, Gahes 2
Rack position (target value) of the control rack 18 when the control rack 5 operates normally according to the displacement of the accelerator pedal 16
is stored in advance in the form of a data table. CPU2
The output of No. 3 is connected to the output interface 26 and the drive circuit 27.
It is connected to the solenoid valve 28 via. This solenoid valve 28 is interposed in a fuel supply pipe 32 that connects a fuel tank 30 and a feed pump 31. 33 is a fuel filter, 34
is a timer, and 35 is an injection nozzle.

このような構成の装置の作用を第2図の構成図及び第3
図に示すマイクロコンピュータのフローチャートに基づ
いて説明する。先ず、図外の始動スイッチを入れて機関
を始動させた後、回転センサ11からの機関の現時の回
転速度をAD変換器21でデジタル信号に変換してから
人力インタフェース22を介してCPU23に取込む。
The operation of the device with such a configuration is shown in the configuration diagram in Figure 2 and Figure 3.
The explanation will be based on the flowchart of the microcomputer shown in the figure. First, after turning on the starting switch (not shown) to start the engine, the current rotational speed of the engine from the rotation sensor 11 is converted into a digital signal by the AD converter 21 and then sent to the CPU 23 via the human power interface 22. It's crowded.

CPU23は、現時の回転速度が定格回転速度以上か否
か判別し、定格回転速度以上のときにはペダル位置セン
サ12により検出されるアクセルペツル16の現時のペ
ダル位置を人力し、ROM24に記憶されたデータテー
ブルから上記ペダル位置に1もしたコントロールラック
18のラック[」枠位置をルックアップする。次いでC
PU23は、現時のラック位置RWtと」−記ラツク目
標位置とを比較し、現時のラック位置RW1が目標位置
を1.10るときにはt秒後のラック位置RW2を+l
T瓜人pする。更にCPU23は、」−記ラツク位置R
W1とこのランク位置RW2 との差Aを比較判断し、
そのX″Aが規定値αより小さいときには燃料供給、(
イブ32の流路を遮断するように電磁弁14を閉じる。
The CPU 23 determines whether the current rotational speed is higher than the rated rotational speed, and when the rotational speed is higher than the rated rotational speed, the CPU 23 manually inputs the current pedal position of the accelerator pedal 16 detected by the pedal position sensor 12, and reads the data stored in the ROM 24. Look up the rack ['' frame position of the control rack 18 with 1 added to the above pedal position from the table. Then C
The PU 23 compares the current rack position RWt with the rack target position written in "-", and if the current rack position RW1 is 1.10 less than the target position, the rack position RW2 after t seconds is set to +l.
T urin p. Furthermore, the CPU 23
Compare and judge the difference A between W1 and this rank position RW2,
When X″A is smaller than the specified value α, fuel is supplied, (
The solenoid valve 14 is closed to block the flow path of the eve 32.

これにより燃料噴射ポンプ17に供給される燃料はカン
トされ、機関10は停止する。
As a result, the fuel supplied to the fuel injection pump 17 is canted, and the engine 10 is stopped.

「発明の効果] 以ト述へたように、本発明によれば、機関の回1、、、
速度が定格回転速度量にになったときのコントロールラ
ックの制御量が不足している状態でのう2.り位置の紅
時変化量を算出し、その値が小さいときに、自動的に機
関の異常を感知して機関へ供給する燃料をカットするこ
とにより、機関のオーバーランを未然に防止して機関を
破損させることのない優れた効果がある。
"Effects of the Invention" As mentioned above, according to the present invention, the engine rotation 1,...
2. When the control rack control amount is insufficient when the speed reaches the rated rotational speed amount. By calculating the amount of change in the red position of the engine and when the value is small, it automatically detects an abnormality in the engine and cuts the fuel supplied to the engine, thereby preventing engine overrun and restarting the engine. It has an excellent effect that does not damage the product.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の構成を明示するための全体構成図。 第2図は本発明実施例停止装置の構成図。 第3図はそのマイクロコンピュータの作用を小すフロチ
ャート。 lO:ディーゼル機関、11:回転センサ、12:ペダ
ル位置センサ、13ニラツク位置センサ、14:燃料流
路開閉手段(電磁弁)、15:制御手段(マイクロコン
ピュータ)、17:燃料噴射ポンプ、23:CPU、2
4:ROM、25:ガバナ、30:燃料タンク、32:
燃料供給パイプ。 特許出願人 日野自動車工業株式会社 第2図
FIG. 1 is an overall configuration diagram for clearly showing the configuration of the present invention. FIG. 2 is a configuration diagram of a stopping device according to an embodiment of the present invention. Figure 3 is a flowchart for reducing the action of the microcomputer. lO: diesel engine, 11: rotation sensor, 12: pedal position sensor, 13 position sensor, 14: fuel passage opening/closing means (electromagnetic valve), 15: control means (microcomputer), 17: fuel injection pump, 23: CPU, 2
4: ROM, 25: Governor, 30: Fuel tank, 32:
fuel supply pipe. Patent applicant Hino Motors Co., Ltd. Figure 2

Claims (1)

【特許請求の範囲】[Claims] (1)千イーセル機関の回転速度を検出する回転センサ
と、 に記機関のアクセルペダルのペダル位置を検出するペダ
ルB装置センサと、 )、記J! IW+の燃料噴射ポンプのコントロールラ
ックのラック位置を検出するラック位置センサと、上記
燃料噴射ポンプに導かれる燃料流路を開閉する燃料流路
開閉手段と、 H記ペタル位11ゝ°1に応じたコントロールラックの
ランクII標イ17置を記憶し、かつ−に記回転センサ
により検出される現時の機関の回転速度が定格回転速度
以1.であるとき上記ラック位置センサにより検出され
る現時のラック位置とに記うック目標位置とを比較し、
第一の時刻におけるラック位置と1記うックII標位置
との差が所定争以−ヒであるとき所’)u項t!f間後
の第二の時刻におけるラック位置を検出して、第一の時
刻におけるラック位置と第二の時刻におけるラック位置
とを比較し、その差が規定値以下であるとき、1−記燃
料流路を遮断するように」二記燃料流路開閉手段を制御
する制御手段と を備えたディーゼル機関の異常時緊急停止装置。
(1) A rotation sensor that detects the rotational speed of the 1,000-speed engine; A pedal B device sensor that detects the position of the accelerator pedal of the engine; ), J! A rack position sensor that detects the rack position of the control rack of the IW+ fuel injection pump, a fuel passage opening/closing means that opens and closes the fuel passage led to the fuel injection pump, The rank II mark 17 position of the control rack is memorized, and the current engine rotation speed detected by the rotation sensor is 1. Compare the current rack position detected by the rack position sensor with the rack target position described in .
When the difference between the rack position at the first time and the first mark II mark position is equal to the predetermined difference, then ') u term t! The rack position at a second time after f time is detected, and the rack position at the first time and the rack position at the second time are compared, and when the difference is less than or equal to the specified value, the fuel 2. An emergency stop device for a diesel engine in the event of an abnormality, comprising a control means for controlling a fuel flow passage opening/closing means to shut off the flow passage.
JP6415484A 1984-03-30 1984-03-30 Emergency stopping device for abnormal diesel-engine Pending JPS60206954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6415484A JPS60206954A (en) 1984-03-30 1984-03-30 Emergency stopping device for abnormal diesel-engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6415484A JPS60206954A (en) 1984-03-30 1984-03-30 Emergency stopping device for abnormal diesel-engine

Publications (1)

Publication Number Publication Date
JPS60206954A true JPS60206954A (en) 1985-10-18

Family

ID=13249870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6415484A Pending JPS60206954A (en) 1984-03-30 1984-03-30 Emergency stopping device for abnormal diesel-engine

Country Status (1)

Country Link
JP (1) JPS60206954A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257264A2 (en) * 1986-08-28 1988-03-02 VDO Adolf Schindling AG Apparatus with an injection pump
WO1990001630A1 (en) * 1988-08-05 1990-02-22 Hitachi Construction Machinery Co., Ltd. Remote controller of engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257264A2 (en) * 1986-08-28 1988-03-02 VDO Adolf Schindling AG Apparatus with an injection pump
WO1990001630A1 (en) * 1988-08-05 1990-02-22 Hitachi Construction Machinery Co., Ltd. Remote controller of engine

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