JPS6365147A - Fuel injection timing controller - Google Patents

Fuel injection timing controller

Info

Publication number
JPS6365147A
JPS6365147A JP20905386A JP20905386A JPS6365147A JP S6365147 A JPS6365147 A JP S6365147A JP 20905386 A JP20905386 A JP 20905386A JP 20905386 A JP20905386 A JP 20905386A JP S6365147 A JPS6365147 A JP S6365147A
Authority
JP
Japan
Prior art keywords
oil
injection timing
signal
hydraulic
control
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
Application number
JP20905386A
Other languages
Japanese (ja)
Other versions
JPH0751904B2 (en
Inventor
Hideo Nagakura
永倉　秀雄
Toshiaki Tsuda
俊明 津田
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
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 filed Critical Hino Motors Ltd
Priority to JP61209053A priority Critical patent/JPH0751904B2/en
Publication of JPS6365147A publication Critical patent/JPS6365147A/en
Publication of JPH0751904B2 publication Critical patent/JPH0751904B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • High-Pressure Fuel Injection Pump Control (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE:To abate a control error due to a variation in viscosity of oil, by compensating a control signal to a hydraulic pressure adjustable device, adjusting the extent of hydraulic pressure, on the basis of oil temperature of a hydraulic actuator which controls a fuel injection timing adjustable device for a Diesel engine. CONSTITUTION:Hydraulic pressure out of a hydraulic power source 5 is led into a hydraulic actuator 6 controlling the injection timing of a fuel injection pump 10 of a Diesel engine 1 via a solenoid valve 4. A microcomputer 3 operates a control signal to optimum injection timing on the basis of an engine speed signal and each signal out of an injection timing sensor 12 and a load sensor 14, and outputs it to a solenoid valve 4. This microcomputer 3 also compensates a control signal to the solenoid valve 4 so as cause it to become the timing advance side in proportion as oil temperature goes higher on the basis of a signal out of a temperature sensor 15 detecting oil temperature inside the hydraulic actuator 6, thereby compensating a leak portion of oil due to a drop in viscosity.

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のタイミング制御装置の改良に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a timing control device for a diesel engine.

〔慨要〕[Summary]

機関回転速度を入力として制御信号を発生し、その制御
信号に応じて油圧を変化させ、その油圧にしたがって燃
料噴射タイミングを制？）Ｉｔするディーゼル機関のタ
イミング制御装置において、油圧用オイルの温度を検出
し、その温度にしたがって制御信号を微小調節すること
により、オイルの温度変化に伴う粘度の相違による制？
’［ｌ＋誤差を減少させるようにしたものである。Generates a control signal using the engine rotational speed as input, changes oil pressure according to that control signal, and controls fuel injection timing according to that oil pressure? ) In the timing control device of a diesel engine, the temperature of the hydraulic oil is detected and the control signal is minutely adjusted according to the temperature.
'[l+ This is designed to reduce the error.

〔従来の技術〕[Conventional technology]

ディーゼル機関のタイミング制御装置として、機関の回
転情報を人力として制御信号を発生するプログラム制御
［１１回路と、この制御０信号にしたがって油圧を加減
する油圧加減手段と、この油圧に応じて上記ディーゼル
機関の燃料噴射タイミング可変手段を制御する油圧アク
チュエータとを（ｌｉ：ｔえた装置が広く利用されてい
る。As a timing control device for a diesel engine, a program control circuit [11] that generates a control signal using human power based on rotational information of the engine, a hydraulic pressure adjusting means for adjusting the hydraulic pressure according to this control 0 signal, and a timing control device for controlling the diesel engine according to the hydraulic pressure. A hydraulic actuator for controlling a variable fuel injection timing means is widely used.

この従来装置では、機関の運転に佳い油圧用オイルの温
度が変化すると、オイルのｉ、’ｊ度が変化し油圧アク
チュエータに一定の油圧を供給しても、油圧アクチュエ
ータの機械変位が一定にならず、制御誤差が生じること
が知られている。しかし、この制′４１ｎ誤差は比較的
小さいので、従来装置では大きな問題とはならなかった
。In this conventional device, when the temperature of the hydraulic oil changes, the i and 'j degrees of the oil change, and even if a constant hydraulic pressure is supplied to the hydraulic actuator, the mechanical displacement of the hydraulic actuator remains constant. It is known that control errors occur. However, since this error is relatively small, it did not pose a major problem in the conventional device.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

近時、ディーゼル機関のタイミング制御精度の向上が求
められている。特に、タイミング制御にサーボ制御が行
われるようになり、この油圧用オイルの温度変化に伴う
制御誤差があると、制御にハンティングが生しるあるい
は制御遅れが生じるなどの現象が見られ、この制御誤差
をサーボ制御ループとは別に補正する必要が生している
。In recent years, there has been a demand for improved timing control accuracy for diesel engines. In particular, servo control is now used for timing control, and if there is a control error due to changes in the temperature of hydraulic oil, phenomena such as hunting or control delays are observed, and this control This creates a need to correct errors separately from the servo control loop.

本発明はこれを解決するもので、油圧用オイルの温度変
化に伴うオイルの粘度の変化により生じるタイミング制
御誤差を小さくし、タイミング精度を向上することを目
的とする。The present invention solves this problem, and aims to reduce timing control errors caused by changes in oil viscosity due to changes in the temperature of hydraulic oil, and improve timing accuracy.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、ディーゼル機関の回転情報を入力として制御
信号を発生するプログラム制御回路と、上記制ｉＩｌ！
信号にしたがって油圧を加減する油圧加減手段と、上記
油圧に応じて上記ディーゼル機関の燃料噴射タイミング
可変手段を制御する油圧アクチュエータとを備えたタイ
ミング制御装置において、上記油圧アクチュエータのオ
イルの温度を検出する温度センサを備え、上記制御回路
はこの温度センサの出力信号にしたがって上記制御信号
を補正する手段を含むことを特徴とする。The present invention provides a program control circuit that generates a control signal by inputting rotation information of a diesel engine, and the above-mentioned control circuit!
In the timing control device, the timing control device includes a hydraulic pressure adjusting means for adjusting the hydraulic pressure according to a signal, and a hydraulic actuator for controlling the fuel injection timing variable means of the diesel engine according to the hydraulic pressure, in which a temperature of oil in the hydraulic actuator is detected. It is characterized in that it includes a temperature sensor, and the control circuit includes means for correcting the control signal according to the output signal of the temperature sensor.

〔作用〕[Effect]

油圧アクチュエータのオイル温度を温度センサにより電
気信号として検出し、この電気信号をプログラム制御回
路に与え、プログラム制御回路では、この電気信号が示
す値にしたがって制；Ｘ＋＋信−５を補正する。制御信
号を補正する手段には、この油圧用オイルの温度変化に
伴う制御誤差の値を予め設定しておき、この値に基づき
補正演算を行う。The oil temperature of the hydraulic actuator is detected as an electrical signal by a temperature sensor, and this electrical signal is given to a program control circuit, which corrects the control signal according to the value indicated by this electrical signal. In the means for correcting the control signal, a value of a control error caused by a temperature change of the hydraulic oil is set in advance, and a correction calculation is performed based on this value.

制御誤差の値はテーブルで設定しておくこともでき、あ
るいは近似式その他の方法で設定しておくこともできる
。The value of the control error can be set in a table, or can be set using an approximation formula or other methods.

〔実施例〕〔Example〕

第１図は本発明実施例装置のブロック構成図である。デ
ィーゼル機関ｌの回転情幸旧よ回転センサ２で検出され
機関回転信号としてプログラム制御回路３に入力する。FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention. The rotational state of the diesel engine 1 is detected by a rotation sensor 2 and inputted to a program control circuit 3 as an engine rotation signal.

プログラム制御回路３は制御信号を発生して電（ｎ弁４
にこれを与える。この電磁弁４にはディーゼル機関１の
油圧源５より油圧が供給されていて、この油圧を加減し
て油圧アクチュエータ６に供給する。電磁弁４から溢れ
出たオイルは帰コ端８に還元する。油圧アクチェニーク
ロは噴射ポンプｌＯの回転入力の位相を制御■シて燃料
噴射タイミングを制御■する。The program control circuit 3 generates a control signal to
give this to. Hydraulic pressure is supplied to this electromagnetic valve 4 from a hydraulic power source 5 of the diesel engine 1, and this oil pressure is adjusted and supplied to a hydraulic actuator 6. Oil overflowing from the solenoid valve 4 is returned to the return end 8. The hydraulic actuator controls the phase of the rotational input of the injection pump lO, thereby controlling the fuel injection timing.

噴射ポンプ１０には噴射時期センサ１２が接続されてい
て、噴射時期信号をプログラム制御回路３に与える。ま
た燃料供給弁開度は負荷センサ１４により検出されて、
負荷信号としてプログラム制御回路３に与えられる。噴
射時期センサ１２は実噴射時期を検出して制御に帰運す
るもので、この実施例装置はサーボ制御される構成とな
っている。An injection timing sensor 12 is connected to the injection pump 10 and provides an injection timing signal to the program control circuit 3. Further, the fuel supply valve opening degree is detected by the load sensor 14,
It is given to the program control circuit 3 as a load signal. The injection timing sensor 12 detects the actual injection timing and returns to the control, and the device of this embodiment is configured to be servo controlled.

ここで本発明の特徴とするところは、上記油圧アクチュ
エータ６のオイルの温度を検出する温度セン４月５を備
え、この温度センサ１５により検出された温度信号をプ
ログラム制御回路３に与え、プログラム制御回路はこの
温度センサの出力信号にしたがって上記制御信号を補正
するところにある。Here, the present invention is characterized by being equipped with a temperature sensor 5 for detecting the temperature of the oil in the hydraulic actuator 6, and providing the temperature signal detected by the temperature sensor 15 to the program control circuit 3 to control the program. The circuit corrects the control signal according to the output signal of this temperature sensor.

すなわち、プログラム制御回路３の制御プログラムには
、温度信号にしたがって出力制御信号を補正ｆるプログ
ラムを用意しておき、電磁弁４の出力油圧の値を補正す
る。オイルの温度が高いときにはオイルの粘性が低（、
油圧了クチユニータロにリークが生じるので、進角の方
向へ、温度が低いときには逆に遅角の方向に補正を行う
。That is, in the control program of the program control circuit 3, a program for correcting the output control signal according to the temperature signal is prepared, and the value of the output oil pressure of the solenoid valve 4 is corrected. When the oil temperature is high, the viscosity of the oil is low (,
Since a leak occurs in the oil pressure unit, the correction is made in the direction of advance angle, and conversely in the direction of retardation when the temperature is low.

オイルの温度検出は油圧アクチュエータ６０入力側オイ
ルの温度を検出するようになっているが、油圧アクチュ
エータ６そのものの温度を検出する、あるいは出力側オ
イルの温度を検出するなどその他の方法でも実施するこ
とができる。The oil temperature is detected by detecting the temperature of the oil on the input side of the hydraulic actuator 60, but it can also be carried out by other methods such as detecting the temperature of the hydraulic actuator 6 itself or the temperature of the oil on the output side. Can be done.

プログラム制御回路３からは上記型（■弁４への制御信
号の他に、タコグラフ１６への表示信号および異常信号
モニタ信号が送出される。In addition to the control signal to the above-mentioned type valve 4, the program control circuit 3 sends out a display signal to the tachograph 16 and an abnormal signal monitor signal.

第２図にこのプログラム制御回路３の本発明に係る部分
の制御フローチャートを示す。本発明の特徴は第２図に
※印を付した温度補正にある。この実施例では電磁弁４
の開時間の長さをオイルの温度に応じて補正する方法を
とっている。FIG. 2 shows a control flowchart of the portion of the program control circuit 3 according to the present invention. The feature of the present invention is the temperature correction marked with * in Fig. 2. In this embodiment, the solenoid valve 4
The length of the opening time is corrected according to the oil temperature.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明によれば油圧用オイルの温
度が変化し、オイルの粘度が変化して油圧アクチュエー
タの作用が変化しても、これを制御信号により補正する
ので、タイミング制１ｆｆｌｌの精度が向上する。特に
、サーボ制？１１１を行う装置では制？Ｉｌｌに伴うハ
ンティングや制御遅れが小さくなり、安定なタイミング
制御を行うことができる優れた効果がある。As explained above, according to the present invention, even if the temperature of the hydraulic oil changes, the viscosity of the oil changes, and the action of the hydraulic actuator changes, this is corrected by the control signal, so the timing system 1ffll is corrected. Improves accuracy. Especially the servo system? Is there a restriction on equipment that performs 111? This has the excellent effect of reducing hunting and control delays caused by Ill, and enabling stable timing control.

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

第１図は本発明実施例装置のブロック構成図。 第２図は本発明実施例装置の要部制御フローチャート。 １・・・ディーゼル機関、２・・・回転センサ、３・・
・プログラム制ｉ’［１１回路、４・・・電磁弁、５・
・・油圧源、６・・・油圧アクチュエータ、８・・・帰
還端、１０・・・噴射ポンプ、１２・・・噴射時期セン
サ、１４・・・負荷センサ、１５・・・温度センサ、１
６・・・タコグラフ。FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention. FIG. 2 is a main control flowchart of the apparatus according to the embodiment of the present invention. 1...Diesel engine, 2...Rotation sensor, 3...
・Program system i' [11 circuits, 4... solenoid valves, 5...
... Hydraulic source, 6... Hydraulic actuator, 8... Return end, 10... Injection pump, 12... Injection timing sensor, 14... Load sensor, 15... Temperature sensor, 1
6... Tachograph.

Claims (1)

【特許請求の範囲】[Claims] （１）　ディーゼル機関の回転情報を入力として制御信
号を発生するプログラム制御回路と、 上記制御信号にしたがって油圧を加減する油圧加減手段
と、 上記油圧に応じて上記ディーゼル機関の燃料噴射タイミ
ング可変手段を制御する油圧アクチュエータと を備えたタイミング制御装置において、 上記油圧アクチュエータのオイルの温度を検出する温度
センサを備え、 上記制御回路はこの温度センサの出力信号にしたがって
上記制御信号を補正する手段を含むことを特徴とするタ
イミング制御装置。(1) A program control circuit that receives rotation information of the diesel engine as input and generates a control signal, a hydraulic pressure adjustment means that adjusts or reduces the hydraulic pressure according to the control signal, and a fuel injection timing variable means for the diesel engine according to the oil pressure. A timing control device comprising a hydraulic actuator to be controlled, comprising a temperature sensor for detecting the temperature of oil in the hydraulic actuator, and the control circuit including means for correcting the control signal in accordance with the output signal of the temperature sensor. A timing control device characterized by:
JP61209053A 1986-09-05 1986-09-05 Timing control device Expired - Fee Related JPH0751904B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61209053A JPH0751904B2 (en) 1986-09-05 1986-09-05 Timing control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61209053A JPH0751904B2 (en) 1986-09-05 1986-09-05 Timing control device

Publications (2)

Publication Number Publication Date
JPS6365147A true JPS6365147A (en) 1988-03-23
JPH0751904B2 JPH0751904B2 (en) 1995-06-05

Family

ID=16566474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61209053A Expired - Fee Related JPH0751904B2 (en) 1986-09-05 1986-09-05 Timing control device

Country Status (1)

Country Link
JP (1) JPH0751904B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0410405A2 (en) * 1989-07-27 1991-01-30 Cummins Engine Company, Inc. Viscosity responsive flow controlling system
EP0676538A2 (en) * 1994-04-05 1995-10-11 Cummins Engine Company, Inc. An engine timing control tappet system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57126378A (en) * 1981-01-26 1982-08-06 Hitachi Ltd Hydraulic elevator
JPS57169840U (en) * 1981-04-20 1982-10-26
JPS58120162U (en) * 1982-02-08 1983-08-16 フジテック株式会社 Hydraulic elevator speed control device
JPS5929732A (en) * 1982-08-12 1984-02-17 Japanese National Railways<Jnr> Method for controlling fuel injection in diesel engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57126378A (en) * 1981-01-26 1982-08-06 Hitachi Ltd Hydraulic elevator
JPS57169840U (en) * 1981-04-20 1982-10-26
JPS58120162U (en) * 1982-02-08 1983-08-16 フジテック株式会社 Hydraulic elevator speed control device
JPS5929732A (en) * 1982-08-12 1984-02-17 Japanese National Railways<Jnr> Method for controlling fuel injection in diesel engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0410405A2 (en) * 1989-07-27 1991-01-30 Cummins Engine Company, Inc. Viscosity responsive flow controlling system
EP0676538A2 (en) * 1994-04-05 1995-10-11 Cummins Engine Company, Inc. An engine timing control tappet system
EP0676538A3 (en) * 1994-04-05 1997-08-13 Cummins Engine Co Inc An engine timing control tappet system.

Also Published As

Publication number Publication date
JPH0751904B2 (en) 1995-06-05

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