JPS6043147A - Electronic control apparatus for diesel engine - Google Patents

Electronic control apparatus for diesel engine

Info

Publication number
JPS6043147A
JPS6043147A JP58150150A JP15015083A JPS6043147A JP S6043147 A JPS6043147 A JP S6043147A JP 58150150 A JP58150150 A JP 58150150A JP 15015083 A JP15015083 A JP 15015083A JP S6043147 A JPS6043147 A JP S6043147A
Authority
JP
Japan
Prior art keywords
signal
rotation speed
abnormal
tdc
injection timing
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
JP58150150A
Other languages
Japanese (ja)
Inventor
Yasuhiro Kobayashi
康博 小林
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.)
Hitachi Ltd
Original Assignee
Japan Electronic Control Systems Co Ltd
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 Japan Electronic Control Systems Co Ltd filed Critical Japan Electronic Control Systems Co Ltd
Priority to JP58150150A priority Critical patent/JPS6043147A/en
Publication of JPS6043147A publication Critical patent/JPS6043147A/en
Pending legal-status Critical Current

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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • 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
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/401—Controlling injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

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

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 く技術分野〉 本発明はディーゼルエンジンの電子制御装置に関し、特
に回転数信号のバンクアップに関′する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an electronic control device for a diesel engine, and particularly to bank-up of a rotational speed signal.

く背景技術〉 ディーゼルエンジンの電子制御装置では、エンジン各気
筒の上死点位置で信号を発するクランク角センサからの
上死点信号（以下ＴＤＣ信号という）と、特定気筒の燃
料噴射ノズルのノズルリフトを検出して信号を発するノ
ズルリフトセンナからのノズルリフト信号（以下ＮＬ倍
信号いう）とを入力として、回転数の検出と噴射時期の
検出とを行うが、これには同一のタイマーを共有する２
゜系統のタイマー割込系が必要であり、１系統のタイで
一人力しか持たないシステムでは、入力回路で複合信号
を作成する必要がある。BACKGROUND TECHNOLOGY In the electronic control device of a diesel engine, a top dead center signal (hereinafter referred to as TDC signal) from a crank angle sensor that emits a signal at the top dead center position of each engine cylinder, and a nozzle lift of the fuel injection nozzle of a specific cylinder are used. The rotation speed and injection timing are detected by inputting the nozzle lift signal (hereinafter referred to as NL multiplication signal) from the nozzle lift sensor which detects the 2
゜A system of timer interrupt systems is required, and in systems where only one person has the power, it is necessary to create a composite signal in the input circuit.

このため、第１図に示すように、ＴＤＣ信号を回転数検
出用の入力とする一方、出力がＮＬ倍信号セットされＴ
ＤＣ信号でリセットされる回路を設け、この回路の出力
信号（第２図ｔ６１参照）を噴射時期検出用の入力とし
ている。For this reason, as shown in Fig. 1, while the TDC signal is used as the input for detecting the rotation speed, the output is set to the NL times signal.
A circuit that is reset by a DC signal is provided, and the output signal of this circuit (see t61 in FIG. 2) is used as an input for detecting the injection timing.

しかし、ＴＤＣ信号の信号系に異常が発生し、信号が入
力されなくなった場合、第２図ｉｎ＋に示されるように
ＴＤＣ信号のみならず複合信号もなくなるので、バンク
アンプも含め回転数の検出ができなくなるという問題点
があった。However, if an abnormality occurs in the TDC signal signal system and the signal is no longer input, not only the TDC signal but also the composite signal will be lost, as shown in Figure 2 in+, so the rotation speed detection including the bank amplifier will be impossible. The problem was that it was not possible.

〈発明の目的〉 本発明は、このような従来の問題点に鑑み、ＴＤＣ信号
の異常時に、Ｎ　Ｌ信号とＴＤＣ信号との複合信号から
回転数を検出できるように、複合信号の作成手段を改良
したディーゼルエンジンの電子制御装置を提供すること
を目的とする。<Object of the Invention> In view of these conventional problems, the present invention provides a means for creating a composite signal so that the rotation speed can be detected from a composite signal of the NL signal and the TDC signal when the TDC signal is abnormal. The purpose of the present invention is to provide an improved electronic control device for a diesel engine.

〈発明の構成〉 このため、本発明は、第３図に示すように、複合信号の
作成手段として、出力がＮＬ倍信号入力により反転され
ＴＤＣ信号の入力によりリセットされる分周回路を設け
たものである。したがって、正常時は第４１ＨＡｌの如
〈従来と同等の機能を果たし、ＴＤＣ信号の異常時には
第４図（ｒ（）の如く複合信号が回転に同期したものと
なるので、この信号から回転数を検出すること、すなわ
ち回転数信号のハックアップが可能となる。そして、回
転数信号が得られれば、フェイルセーフ動作が可能とな
り、噴射時期の制御についてもフィードバック制御は不
能であるが、固定値に制御することは可能である。<Structure of the Invention> Therefore, as shown in FIG. 3, the present invention provides a frequency dividing circuit whose output is inverted by the NL multiplied signal input and reset by the TDC signal input, as a means for generating a composite signal. It is something. Therefore, under normal conditions, the 41st HAl performs the same function as the conventional one, and when the TDC signal is abnormal, the composite signal becomes synchronized with the rotation as shown in Figure 4 (r()), so the rotation speed can be determined from this signal. detection, that is, it is possible to hack up the rotational speed signal.If the rotational speed signal is obtained, fail-safe operation becomes possible, and although feedback control is not possible for injection timing control, it is possible to maintain a fixed value. It is possible to control it.

〈実施例〉 以下に実施例を説明する。<Example> Examples will be described below.

第５図において、１は分周回路であり、−ノズルリフ１
−センサからのＮ　Ｌ信号の入力で反転されクランク角
センサからのＴＤＣ信号の入力でリセットされる出力信
号を発信する。したがって、その出力信号は、第６図に
示されるように、ＴＤＣ信号とＮＬ信月が共に正常な場
合（ＯＫ時）に進角時間信号となり、ＴＤＣ信号が異常
な場合（ＴＤＣ−Ｎ０時）にＮＬ倍信号間回転時間信号
となり、Ｎ　Ｌ信号が異常な場合（ＮＬ−ＮＧ。時）に
０のままとなる。In FIG. 5, 1 is a frequency dividing circuit, - nozzle rift 1
- produces an output signal which is inverted by the input of the NL signal from the sensor and reset by the input of the TDC signal from the crank angle sensor; Therefore, as shown in Fig. 6, the output signal becomes an advance time signal when both the TDC signal and the NL signal are normal (when OK), and when the TDC signal is abnormal (when TDC-N0). It becomes the rotation time signal between the NL times the signal and remains 0 when the NL signal is abnormal (NL-NG).

２ば正常時回転数演算部で、クランク角センサせらのＴ
ＤＣ信号（その周期）に基づいて回転数を演算する。３
は正常時噴射時期制御部で、分周回路１からの進角時間
信号と正常時回転数演算部２からの回転数信号とに基づ
いて実際の噴射時期を検出しつつ噴射時期をフィードバ
ック制御する。2. In the normal rotation speed calculation section, T of the crank angle sensor
The rotation speed is calculated based on the DC signal (its period). 3
is a normal injection timing control section, which performs feedback control of the injection timing while detecting the actual injection timing based on the advance time signal from the frequency dividing circuit 1 and the rotation speed signal from the normal rotation speed calculation section 2. .

４はＴＤＣ信号及びＮＬ倍信号異常を検出する異雷判定
部で、ＴＤＣ信号の異常についてはその有無から、ＮＬ
倍信号異常については分周回路１の出力の有無から判定
する。尚、ＴＤＣ信号の異常について分周回路１の出力
のデユーティから判定してもよい。4 is an unusual lightning determination unit that detects abnormalities in the TDC signal and NL double signal.
A double signal abnormality is determined based on the presence or absence of the output of the frequency dividing circuit 1. Incidentally, the abnormality of the TDC signal may be determined based on the duty of the output of the frequency dividing circuit 1.

５ば異常時回転数演算部で、ＴＤＣ信号の異常時に、正
常時回転数演算部２に代って、分周回路１からの出力信
号（ＮＬ倍信号間回転時間信号）に基づいて回転数を演
算する。図においては正常時回転数演算部２と異常時回
転数演算部５とがスイッチＳＷＩによって切換えられる
ようにして、ある。5, the abnormal rotation speed calculation section calculates the rotation speed based on the output signal from the frequency dividing circuit 1 (NL multiplier inter-signal rotation time signal) when the TDC signal is abnormal, instead of the normal rotation speed calculation section 2. Calculate. In the figure, a normal rotation speed calculation section 2 and an abnormal rotation speed calculation section 5 are configured to be switched by a switch SWI.

６は異常時噴射時期演算部で、ＴＤＣ信号およびＮＬ倍
信号いずれか一方の異常時に、正常時噴射時期制御部３
に代って、正常時回転数演算部２又は異常時回転数演算
部５からの回転数信号に基づき噴射時期を予め定められ
た固定値に制御する。Reference numeral 6 denotes an abnormal injection timing calculation unit, which operates the normal injection timing control unit 3 when either the TDC signal or the NL multiplication signal is abnormal.
Instead, the injection timing is controlled to a predetermined fixed value based on the rotational speed signal from the normal rotational speed calculation section 2 or the abnormal rotational speed calculation section 5.

図においては正常時噴射時期制御部３と異常時噴射時期
制御部６とがスイッチＳＷ２によって切換えられるよう
にしである。In the figure, the normal injection timing control section 3 and the abnormal injection timing control section 6 are switched by a switch SW2.

尚、スイッチＳＷ　１．ＳＷ２の切換特性は次表に示す
通りである。但し、×は制御不能。In addition, switch SW1. The switching characteristics of SW2 are shown in the following table. However, × is uncontrollable.

また、上記の構成をフローチャートで示すと第７図の如
くとなる。Further, the above configuration is shown in a flowchart as shown in FIG.

したがって、ＴＤＣ信号及びＮＬ倍信号共に正常な易合
は、正常時回転数演算部２にてＴＤＣ信号から回転数が
演算され、正常時噴射時期制御部３にて分周回路１から
の進角時間信号と正常時回転ｉａ演算部２からの回転数
信号とに基づいて実際の噴射時期を検出しつつ噴射時期
をフィードハック制御する。Therefore, when both the TDC signal and the NL multiplication signal are normal, the normal rotation speed calculation section 2 calculates the rotation speed from the TDC signal, and the normal injection timing control section 3 calculates the advance angle from the frequency dividing circuit 1. Feedhack control of the injection timing is performed while detecting the actual injection timing based on the time signal and the rotational speed signal from the normal rotation ia calculation section 2.

ＴＤＣ信号が異常の場合は、異常時回転数演算部５にて
分周回路１からのＮＬ倍信号間回転時間信号に基づいて
回転数が演算され、異常時噴口・１時期制御部６にて異
常時回転数演算部５がらの回転数信号に基づいて噴射時
期を固定制御、すなわちフェイルセーフを行う。When the TDC signal is abnormal, the rotation speed is calculated in the abnormal rotation speed calculation section 5 based on the NL multiplication signal rotation time signal from the frequency dividing circuit 1, and the rotation speed is calculated in the abnormal nozzle/1 period control section 6. The injection timing is fixedly controlled based on the rotation speed signal from the abnormal rotation speed calculation section 5, that is, fail-safe is performed.

Ｎ　Ｌ信号が異常の場合は、正常時回転数演算部２にて
ＴＩ）Ｃ信号から回転数が演算され、異常時噴射時期制
御部６にて正常時回転数演算部２からの回転数信号に基
づいて噴射時期を固定制御、すなわちフェイルセーフを
行う。If the N L signal is abnormal, the normal rotation speed calculation section 2 calculates the rotation speed from the TI)C signal, and the abnormal injection timing control section 6 calculates the rotation speed signal from the normal rotation speed calculation section 2. The injection timing is fixedly controlled based on this, that is, fail-safe.

但し、ＴＤＣ信号及びＮ　Ｌ信号が共に異常の場合は、
制御不能となる。However, if both the TDC signal and N L signal are abnormal,
Becomes out of control.

〈発明の効果〉 以上説明したように本発明乙こまれば、ＴＤＣ信号とＮ
　Ｌ信号との複合信号の作成手段を改良することにより
、ＴＤＣ信号の異常時に回転数に関連した複合信号が得
られるので、回転数信号のバンクアンプが可能となり、
これによりフェイルセーフ動作を行わせることができる
。<Effects of the Invention> As explained above, if the present invention is implemented, the TDC signal and N
By improving the means for creating a composite signal with the L signal, a composite signal related to the rotation speed can be obtained when the TDC signal is abnormal, so bank amplification of the rotation speed signal becomes possible.
This allows fail-safe operation to be performed.

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

第１図は従来の信号系の回路図、第２図は第１図におけ
る正常時及びＴＤＣ信号異常時の信号波形図、第３図は
本発明の構成を示す回路図、第４図は第３図における正
常時及びＴＤＣ信号異常時の信号波形図、第５図は本発
明の一実施例を示すブロック図、第６図は第５図におり
−する信号波形図、第７図はフローチャー１・である。 １・・・分周回路　２・・・正常時回転数演算部３・・
・正常時噴射時期制御部　４・・・異常判定部５・・・
界雷時回転数演算部　６・・・異常時噴射時期制御部 特許出願人　日本電子機器株式会社 代理人　弁理士　笹　島　冨二１１（。Fig. 1 is a circuit diagram of a conventional signal system, Fig. 2 is a signal waveform diagram in normal and abnormal TDC signal states in Fig. 1, Fig. 3 is a circuit diagram showing the configuration of the present invention, and Fig. 4 is a diagram of signal waveforms in normal and abnormal TDC signal states. Figure 3 is a signal waveform diagram during normal and abnormal TDC signals, Figure 5 is a block diagram showing an embodiment of the present invention, Figure 6 is a signal waveform diagram similar to Figure 5, and Figure 7 is a flowchart. Char 1. 1... Frequency dividing circuit 2... Normal rotation speed calculating section 3...
・Normal injection timing control section 4... Abnormality determination section 5...
RPM calculation unit during lightning strikes 6... Injection timing control unit during abnormal conditions Patent applicant: Japan Electronics Co., Ltd. Patent attorney Tomiji Sasashima 11 (.

Claims (1)

【特許請求の範囲】[Claims] クランク角センサからの上死点信号、および、ノズルリ
フトセンサからのノズルリフト信号と前記上死点信号と
の複合信号を入力として、回転数の検出と噴射時期の検
出とを行うディーゼルエンジンの電子制御装置において
、前記複合信号の作成手段として、出力が前記ノズルリ
フト信号で反転され前記上死点信号でリセットされる分
周回路を設けたことを特徴とするディーゼルエンジンの
電子制御装置。Diesel engine electronics that detect rotation speed and injection timing by inputting a top dead center signal from a crank angle sensor and a composite signal of a nozzle lift signal from a nozzle lift sensor and the top dead center signal. An electronic control device for a diesel engine, characterized in that the control device is provided with a frequency dividing circuit whose output is inverted by the nozzle lift signal and reset by the top dead center signal as means for creating the composite signal.
JP58150150A 1983-08-19 1983-08-19 Electronic control apparatus for diesel engine Pending JPS6043147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58150150A JPS6043147A (en) 1983-08-19 1983-08-19 Electronic control apparatus for diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58150150A JPS6043147A (en) 1983-08-19 1983-08-19 Electronic control apparatus for diesel engine

Publications (1)

Publication Number Publication Date
JPS6043147A true JPS6043147A (en) 1985-03-07

Family

ID=15490586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58150150A Pending JPS6043147A (en) 1983-08-19 1983-08-19 Electronic control apparatus for diesel engine

Country Status (1)

Country Link
JP (1) JPS6043147A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5914879A (en) * 1982-07-15 1984-01-25 蛇の目ミシン工業株式会社 Sewing machine having pattern edditing function
US5417194A (en) * 1993-03-01 1995-05-23 Mercedes-Benz Ag Method of operating a multi-cylinder diesel engine
US6763903B2 (en) 2000-12-18 2004-07-20 Suzuki Motor Corporation Automatic stop/ start-up controlling device of an engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5914879A (en) * 1982-07-15 1984-01-25 蛇の目ミシン工業株式会社 Sewing machine having pattern edditing function
US5417194A (en) * 1993-03-01 1995-05-23 Mercedes-Benz Ag Method of operating a multi-cylinder diesel engine
US6763903B2 (en) 2000-12-18 2004-07-20 Suzuki Motor Corporation Automatic stop/ start-up controlling device of an engine

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