JPS6394039A - Method of controlling fuel for internal combustion engine and device therefor - Google Patents

Method of controlling fuel for internal combustion engine and device therefor

Info

Publication number
JPS6394039A
JPS6394039A JP61237954A JP23795486A JPS6394039A JP S6394039 A JPS6394039 A JP S6394039A JP 61237954 A JP61237954 A JP 61237954A JP 23795486 A JP23795486 A JP 23795486A JP S6394039 A JPS6394039 A JP S6394039A
Authority
JP
Japan
Prior art keywords
amount
fuel
signal
engine
idle
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
JP61237954A
Other languages
Japanese (ja)
Inventor
Shigeto Niitsuma
重人 新妻
Mineo Kashiwatani
峰雄 柏谷
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
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP61237954A priority Critical patent/JPS6394039A/en
Priority to KR870010749A priority patent/KR880005349A/en
Priority to GB08723567A priority patent/GB2197091A/en
Priority to FR8713843A priority patent/FR2605048A1/en
Priority to DE19873734065 priority patent/DE3734065A1/en
Publication of JPS6394039A publication Critical patent/JPS6394039A/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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • 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
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2422—Selective use of one or more tables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D43/00—Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M3/07—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed
    • F02M3/075—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed the valve altering the fuel conduit cross-section being a slidable valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/32—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein

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 make it possible to precisely control fuel even with no opening degree signal from a throttle valve, by compensating the supply amount of fuel in accordance a bypass air amount signal and a rotational speed signal during engine idle operation. CONSTITUTION:When a load is exerted to an engine during engine idle operation, a load switch 11 is turned on while a throttle opening degree sensor 2 delivers an idle opening degree signal. A control unit 7 delivers a drive signal to a solenoid valve 4 to control the position of a valve 4a so that bypass air is fed through an outlet port 4c. In synchronization with this step, the control unit 7 obtains an idle load increment fuel injection signal in accordance with a previous set drive current for the solenoid valve, that is, in accordance with the amount of bypass air, from a map, and controls a fuel injection valve 1 in accordance with the signal to inject a compensated amount of fuel corresponding to the increment of the bypass air amount. Accordingly, it is possible to control the compensation of fuel in accordance with the load condition of the engine during idle operation.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はエンジン回転数と絞弁開度状態により供給燃料
量を制御すると共にアイドル時には絞弁をバイパスする
空気量を制御して回転数を制御するアイドル回転数制御
装置を備えた燃料制御装置に係る。[Detailed Description of the Invention] [Industrial Application Field] The present invention controls the amount of fuel to be supplied depending on the engine speed and throttle valve opening state, and also controls the amount of air that bypasses the throttle valve during idling to control the engine speed. The present invention relates to a fuel control device including an idle speed control device.

［従来の技術〕 内燃機関の燃料制御方法として、特開昭６０−２０４９
３３号公報等に示されるごとく、エンジン回転数信号と
絞弁開度信号とからマイクロコンピュータにより供給燃
料量を演算し、燃料噴射弁を制御して供給燃料量を制御
する方法がある。一方機関のアイドル時の回転数を制御
する方法として、絞弁をバイパスする空気量を制御する
方法がある。[Prior art] As a fuel control method for an internal combustion engine, Japanese Patent Application Laid-Open No. 60-2049
As shown in Japanese Patent No. 33, etc., there is a method in which a microcomputer calculates the amount of fuel to be supplied from an engine rotational speed signal and a throttle valve opening signal, and controls the fuel injection valve to control the amount of fuel to be supplied. On the other hand, as a method of controlling the engine speed when the engine is idling, there is a method of controlling the amount of air that bypasses the throttle valve.

［発明が解決しようとする問題点〕 上記従来技術を組合せた場合１機関のアイドル運転時に
は、絞弁の操作がないので絞弁開度センサーが出力を発
生しない、その為アイドル時には吸入空気量の変化に見
合った燃料制御ができないという問題点があった。[Problems to be solved by the invention] When the above-mentioned conventional techniques are combined, when one engine is idling, the throttle valve opening sensor does not generate an output because the throttle valve is not operated. There was a problem in that it was not possible to control the fuel to match the changes.

本発明の目的は、絞弁開度センサーからの出力変化がな
い場合においても、吸入空気量の変化に応じた燃料制御
をすることにある。An object of the present invention is to perform fuel control in accordance with changes in the amount of intake air even when there is no change in the output from the throttle valve opening sensor.

Ｃ問題点を解決するための手段〕 上記目的は機関のアイドル運転状態を検出して、アイド
ル運転時にはバイパス空気量に応じて燃料供給量を補正
することにより達成される。Means for Solving Problem C] The above object is achieved by detecting the idle operating state of the engine and correcting the fuel supply amount according to the amount of bypass air during idle operation.

【作用〕[Effect]

この様に構成された本発明によれば機関のアイドル運転
時にはバイパス空気量信号と機関の回転数信号とに応じ
て燃料量が決定されるので絞弁の開度信号がなくとも正
確な燃料制御が可能となる。According to the present invention configured in this manner, the fuel amount is determined according to the bypass air amount signal and the engine rotational speed signal when the engine is idling, so that accurate fuel control is possible even without the throttle valve opening signal. becomes possible.

〔実施例〕〔Example〕

以下、本発明の一実施例を第１図により説明する。エン
ジンに供給される空気量は、絞弁１０により制御される
。絞弁１０の開度状態は絞弁開度センサ２により検出さ
れ、電圧変換されてコントロールユニット７へ入力され
る。エンジン回転数の検出は、ディストリビュータ６内
に設置したクランク角センサ（図示せず）により行なわ
れ、回転数信号としてコントロールユニット７へ入力さ
れる。絞弁開度センサ２の開度信号及びディストリビュ
ータ６からの回転数信号及び空燃比センサ５の出力信号
からコントロールユニット７は、適切な空燃比になる燃
料供給量を計算して、電磁燃料噴射弁１に駆動信号を出
力し燃料量を制御する。An embodiment of the present invention will be described below with reference to FIG. The amount of air supplied to the engine is controlled by a throttle valve 10. The opening state of the throttle valve 10 is detected by the throttle valve opening sensor 2, converted into a voltage, and input to the control unit 7. The engine rotation speed is detected by a crank angle sensor (not shown) installed in the distributor 6, and is input to the control unit 7 as a rotation speed signal. Based on the opening signal of the throttle valve opening sensor 2, the rotational speed signal from the distributor 6, and the output signal of the air-fuel ratio sensor 5, the control unit 7 calculates the fuel supply amount to achieve an appropriate air-fuel ratio, and controls the electromagnetic fuel injection valve. A drive signal is output to 1 to control the amount of fuel.

次に、アイドル時に、負荷がかかった時に、回転数を上
げる場合について説明する。この場合は運転者の操作に
より負荷スイッチ１１がＯＮすると共に、絞弁開度セン
サ２の開度信号がアイドル開度信号を出力する。コント
ロールユニット７は、電磁弁４に駆動信号を出力して、
電磁弁４のバルブ４ａの位置を制御し、バイパス人口４
ｂが駆動信号に応じた分だけ開放され、バイパス空気が
バイパス出口４ｃから供給される。又、それに同期して
コントロールユニットはあらかじめ設定された電磁弁４
の駆動電流、即ち、バイパス空気量に応じたアイドル負
荷増量燃料噴射信号をマツプから求め、その信号に応じ
て燃料噴射弁を制御し、バイパス空気量の増量分に見合
った補正燃料を噴射する。Next, a case will be described in which the rotational speed is increased when a load is applied during idling. In this case, the load switch 11 is turned on by the driver's operation, and the opening signal of the throttle valve opening sensor 2 outputs the idle opening signal. The control unit 7 outputs a drive signal to the solenoid valve 4,
By controlling the position of the valve 4a of the solenoid valve 4, the bypass population 4
b is opened by the amount corresponding to the drive signal, and bypass air is supplied from the bypass outlet 4c. In addition, in synchronization with this, the control unit operates the preset solenoid valve 4.
An idle load increase fuel injection signal corresponding to the drive current, that is, the amount of bypass air is determined from the map, and the fuel injection valve is controlled in accordance with that signal to inject corrected fuel commensurate with the increase in the amount of bypass air.

本実施例に依れば、アイドル時の負荷状態に応じた燃料
補正をバイパス空気量の変化に応じた供給燃料量を、あ
らかじめ設定したマツプから求め、その信号に基づいて
、電磁燃料噴射弁への駆動信号を出力することにより絞
弁開度センサ出力なしに適切な負荷状態に応じた燃料補
正制御できるという効果がある。According to this embodiment, the amount of fuel supplied according to the change in the amount of bypass air is determined from a preset map, and the fuel correction according to the load condition at idle is determined from a preset map. By outputting the drive signal, fuel correction control can be performed appropriately according to the load condition without outputting from the throttle valve opening sensor.

第２図は、本実施例の制御内容を示す、フローチャート
である。FIG. 2 is a flowchart showing the control details of this embodiment.

ステップ１０１では負荷スイッチ（例えばエアコンスイ
ッチ、ヘッドライト等のスイッチ）１１がＯＮか否かを
判定する。負荷スイッチがＯＦＦの場合は他の状態には
関係なくフローを終了し別の制御フローに移る。In step 101, it is determined whether a load switch (for example, an air conditioner switch, a headlight switch, etc.) 11 is ON. When the load switch is OFF, the flow is ended and another control flow is started regardless of other states.

負荷スイッチＯＮの場合はステップ１０２でアイドルス
イッチがＯＮか否かを判定する。（絞弁センサ１０の出
力信号と所定の開度信号を比較してアイドルか否かを判
定してもよい、）アイドルスイッチがＯＦＦの場合は負
荷スイッチがＯＮであってもバイパス空気は供給しない
のでこの制御フローを抜けて別の制御フローに移る。If the load switch is ON, it is determined in step 102 whether the idle switch is ON. (It may be determined whether or not the idle state is idle by comparing the output signal of the throttle valve sensor 10 and a predetermined opening signal.) When the idle switch is OFF, bypass air is not supplied even if the load switch is ON. Therefore, exit this control flow and move to another control flow.

ステップ１０２でアイドルスイッチがＯＮでアイドル運
転中と判定されると、ステップ１０３で所定のアイドル
回転数を得る為に必要なバイパス空気量に対応する電磁
弁４の開度信号をマツプあるいは演算から求め、それに
応じた駆動電流を電磁弁４のコイルに出力する。When it is determined in step 102 that the idle switch is ON and idling operation is in progress, in step 103 the opening signal of the solenoid valve 4 corresponding to the amount of bypass air required to obtain a predetermined idle speed is determined from a map or calculation. , outputs a corresponding drive current to the coil of the solenoid valve 4.

次いで、ステップ１０４でその信号に対応する補正燃料
量を与えるのに必要な電磁燃料噴射弁の開度信号を求め
、燃料量をバイパス空気量に見合って補正する。Next, in step 104, an opening signal of the electromagnetic fuel injection valve necessary to provide a corrected fuel amount corresponding to the signal is determined, and the fuel amount is corrected in accordance with the bypass air amount.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、アイドル時の負荷状態に応じた燃料補
正を、絞弁開度センサの出力によらず、あらかじめ設定
しておいた燃料補正信号値で電磁燃料噴射弁を駆動させ
るので、アイドル時にも適切な燃料供給制御が行なわれ
る。According to the present invention, the fuel correction according to the load state during idling is performed by driving the electromagnetic fuel injection valve with a preset fuel correction signal value, regardless of the output of the throttle valve opening sensor. Appropriate fuel supply control is also carried out.

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

第１図は１本発明の一実施例の燃料制御装置を用いたエ
ンジン制御システム図、第２図は、制御内容を示すフロ
ーチャート。 １・・・電磁燃料噴射弁、２・・・絞弁開度センサ、３
・・・エンジン、４・・・電磁弁、５・・・酸素濃度セ
ンサ、６・・・ディストリビュータ、７・・・コントロ
ールユニット、８・・・トランスミッション、９・・・
イグニッションコイル、１０・・・絞弁、１１・・・負
荷スイッチ、代理人　弁理士　小川勝男゛−′ 第２図FIG. 1 is a diagram of an engine control system using a fuel control device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing control details. 1... Electromagnetic fuel injection valve, 2... Throttle valve opening sensor, 3
...Engine, 4...Solenoid valve, 5...Oxygen concentration sensor, 6...Distributor, 7...Control unit, 8...Transmission, 9...
Ignition coil, 10...throttle valve, 11...load switch, agent patent attorney Katsuo Ogawa ゛-' Figure 2

Claims (1)

【特許請求の範囲】 １、エンジンに供給する燃料量を、エンジン回転数信号
と吸入空気量を制御する絞弁の絞弁開度信号により制御
すると共に絞弁をバイパス空気量を制御してアイドル回
転数を制御するものにおいて、機関のアイドル運転時に
はバイパス空気量に応じて供給燃料量を補正制御するこ
とを特徴とした内燃機関の燃料制御方法。 ２、エンジンに供給する燃料量を、エンジン回転数信号
と吸入空気量を制御する絞弁の絞弁開度信号とから求め
る演算手段と、機関のアイドル運転状態を検出するアイ
ドル判定手段と、アイドル運転時には絞弁をバイパスす
る空気量を制御してアイドル回転数を制御するアイドル
回転数制御装置を備えたものにおいて、前記演算手段が
、前記アイドル判定手段によつてアイドル運転状態と判
定された時、前記燃料量を前記アイドル回転数制御手段
の制御信号に応じて補正する補正手段を設けたことを特
徴とする内燃機関の燃料制御装置。[Claims] 1. The amount of fuel supplied to the engine is controlled by the engine speed signal and the throttle valve opening signal of the throttle valve that controls the amount of intake air, and the throttle valve is idled by controlling the bypass air amount. 1. A fuel control method for an internal combustion engine, which controls the rotational speed, and comprises correcting and controlling the amount of fuel supplied in accordance with the amount of bypass air when the engine is idling. 2. Calculating means for calculating the amount of fuel to be supplied to the engine from the engine speed signal and the throttle valve opening signal of the throttle valve that controls the amount of intake air; idle determining means for detecting the idle operating state of the engine; In the apparatus equipped with an idle rotation speed control device that controls the idle rotation speed by controlling the amount of air that bypasses the throttle valve during operation, when the calculation means is determined to be in an idle operation state by the idle determination means. A fuel control device for an internal combustion engine, comprising a correction means for correcting the fuel amount according to a control signal of the idle rotation speed control means.
JP61237954A 1986-10-08 1986-10-08 Method of controlling fuel for internal combustion engine and device therefor Pending JPS6394039A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP61237954A JPS6394039A (en) 1986-10-08 1986-10-08 Method of controlling fuel for internal combustion engine and device therefor
KR870010749A KR880005349A (en) 1986-10-08 1987-09-28 Fuel control method and apparatus for internal combustion engine
GB08723567A GB2197091A (en) 1986-10-08 1987-10-07 IC engine fuel control
FR8713843A FR2605048A1 (en) 1986-10-08 1987-10-07 METHOD AND DEVICE FOR CONTROLLING FUEL DELIVERY TO AN INTERNAL COMBUSTION ENGINE.
DE19873734065 DE3734065A1 (en) 1986-10-08 1987-10-08 METHOD AND DEVICE FOR CONTROLLING THE FUEL SUPPLY TO AN INTERNAL COMBUSTION ENGINE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61237954A JPS6394039A (en) 1986-10-08 1986-10-08 Method of controlling fuel for internal combustion engine and device therefor

Publications (1)

Publication Number Publication Date
JPS6394039A true JPS6394039A (en) 1988-04-25

Family

ID=17022927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61237954A Pending JPS6394039A (en) 1986-10-08 1986-10-08 Method of controlling fuel for internal combustion engine and device therefor

Country Status (5)

Country Link
JP (1) JPS6394039A (en)
KR (1) KR880005349A (en)
DE (1) DE3734065A1 (en)
FR (1) FR2605048A1 (en)
GB (1) GB2197091A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903660A (en) * 1987-11-19 1990-02-27 Fuji Jukogyo Kabushiki Kaisha Fuel injection control system for an automotive engine
JPH02227532A (en) * 1989-02-28 1990-09-10 Fuji Heavy Ind Ltd Fuel injection control device
JP3378640B2 (en) * 1994-03-09 2003-02-17 富士重工業株式会社 Idling control method
JPH08114142A (en) * 1994-10-17 1996-05-07 Fuji Heavy Ind Ltd Idle control method for engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688750A (en) * 1970-04-30 1972-09-05 Physics Int Co Mass flow metered fuel injection system
DE2749369C2 (en) * 1977-11-04 1985-06-13 Robert Bosch Gmbh, 7000 Stuttgart Control system for an actuator in the additional air supply bypass duct of a throttle valve in internal combustion engines
JPS57126534A (en) * 1981-01-29 1982-08-06 Nippon Denso Co Ltd Engine r.p.m. controlling method
DE3120667A1 (en) * 1981-05-23 1982-12-16 Robert Bosch Gmbh, 7000 Stuttgart CONTROL SYSTEM FOR A FOREIGN IGNITION ENGINE
JPS5970853A (en) * 1982-10-18 1984-04-21 Hitachi Ltd Controller for car engine
US4513713A (en) * 1983-09-06 1985-04-30 Honda Giken Kogyo Kabushiki Kaisha Method of controlling operating amounts of operation control means for an internal combustion engine
JPS6088839A (en) * 1983-10-20 1985-05-18 Honda Motor Co Ltd Method of controlling operation characteristic quantity for operation control means of internal-combustion engine
JPS6128733A (en) * 1984-07-18 1986-02-08 Nippon Soken Inc Method of controlling number of idle revolutions of engine

Also Published As

Publication number Publication date
FR2605048A1 (en) 1988-04-15
GB8723567D0 (en) 1987-11-11
GB2197091A (en) 1988-05-11
DE3734065A1 (en) 1988-04-21
KR880005349A (en) 1988-06-28

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