JPS6013951A - Fuel injection device - Google Patents

Fuel injection device

Info

Publication number
JPS6013951A
JPS6013951A JP12278083A JP12278083A JPS6013951A JP S6013951 A JPS6013951 A JP S6013951A JP 12278083 A JP12278083 A JP 12278083A JP 12278083 A JP12278083 A JP 12278083A JP S6013951 A JPS6013951 A JP S6013951A
Authority
JP
Japan
Prior art keywords
fuel injection
solenoid valve
fuel
normally
valve
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
JP12278083A
Other languages
Japanese (ja)
Inventor
Tetsuya Nakamura
哲也 中村
Nobushi Yasuura
保浦　信史
Yoshihiko Tsuzuki
都築　嘉彦
Takashi Naito
隆 内藤
Yutaka Suzuki
豊 鈴木
Mikio Kumano
熊野　幹夫
Tetsushi Haseda
長谷田　哲志
Akira Masuda
明 益田
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.)
Denso Corp
Original Assignee
NipponDenso 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP12278083A priority Critical patent/JPS6013951A/en
Publication of JPS6013951A publication Critical patent/JPS6013951A/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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
    • F02M41/125—Variably-timed valves controlling fuel passages

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 improve response property in the control of fuel injection by a method wherein a normally closed type solenoid valve and a normally opened type solenoid valve are arranged in the overflow path of a fuel injection pump while a control unit, controlling both solenoid valves, is provided in the device. CONSTITUTION:Fuel is supplied to a Diesel engine 1 from a fuel injection nozzle 2. The face-cam system distribution type fuel injection pump 10 pressurizes the fuel in a pump chamber 13 by a plunger 12 and sends the fuel into the injection nozzle 2 by pressure. The normally opened type solenoid valve 20 and the normally closed type solenoid valve 30 are arranged in the overflow path 17 of the fuel injection pump 10. A control unit 50 operates the objective fuel injection beginning timing and the objective fuel injection finishing timing of the fuel injection pump 10 to control both of the solenoid valves 20, 30. According to this method, the response property in the control of the fuel injection may be improved.

Description

【発明の詳細な説明】 本発明は、燃料噴射開始時期および燃料噴射終了時期を
電気的に制御するようにした燃料噴射装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection device in which fuel injection start timing and fuel injection end timing are electrically controlled.

従来、燃料噴射ボイズの吐出口側と吸入側との間を１個
の電磁弁を介して連通して、その１個の電磁弁の開−弄
時期を閉弁時期を電気的に制御することにより燃料噴射
開始時期、燃料噴射終了時期の調節を行う内燃機関の燃
料噴射装置が提案されている。Conventionally, the discharge port side and the suction side of the fuel injection nozzle are communicated via a single solenoid valve, and the open/close timing of the single solenoid valve is electrically controlled. A fuel injection device for an internal combustion engine that adjusts fuel injection start timing and fuel injection end timing has been proposed.

これらに使用される電磁弁は一般に電気を遮断した状態
から、急に電圧を印加してもコイルのインダクタンスの
影響により駆動電流は急激には立上がらない。コイルの
発生する電磁力はコイルに流れる駆動電流に比例するの
で、電磁力も急激には増加しない。従って、弁の吸引に
もそれだけの時間おくれが発生することになり、従来の
電磁弁をひとつ使用した装置であると、開弁あるいは閉
弁のどちらか一方の電圧の印加される方の応答性は遅れ
が生じることはまぬがれない。Generally, in the electromagnetic valves used in these devices, even if a voltage is suddenly applied from a state where electricity is cut off, the drive current does not rise suddenly due to the influence of the inductance of the coil. Since the electromagnetic force generated by the coil is proportional to the drive current flowing through the coil, the electromagnetic force does not increase rapidly. Therefore, there is a corresponding time delay in the suction of the valve, and in a conventional device using a single solenoid valve, the responsiveness of either the valve opening or valve closing to which voltage is applied is It is inevitable that delays will occur.

本発明は、上記の点に鑑み、ポンプの吐出口側と吸入口
側との間を連通ずる溢流通路に電磁弁を２つ設け、電流
遮断時に１つは閉弁する常閉型、１つは開弁するような
常開型を設定することにより、精度の要求される制御を
電磁弁の電流遮断側だけで行なえるようにして応答性を
向上させることを目的とする。In view of the above points, the present invention provides two solenoid valves in the overflow passage communicating between the discharge port side and the suction port side of the pump, one of which is a normally closed type that closes when the current is cut off, and one of which is a normally closed type that closes when the current is cut off. The first purpose is to improve responsiveness by setting a normally open type solenoid valve so that control requiring precision can be performed only on the current cutoff side of the solenoid valve.

以下本発明を図に示す実施例により説明する。The present invention will be explained below with reference to embodiments shown in the drawings.

第１図において、１はディーゼルエンジンで、燃料噴射
ノズル２から燃料が供給される。１０はフェイスカム式
分配型燃料噴射ポンプで、エンジンにより回転往復駆動
されるプランジャ１２によりポンプ室１３内の燃料を加
圧し、分配ボート１４より噴射ノズル２へ圧送する。In FIG. 1, 1 is a diesel engine, and fuel is supplied from a fuel injection nozzle 2. In FIG. Reference numeral 10 denotes a face cam type distribution type fuel injection pump, which pressurizes fuel in a pump chamber 13 using a plunger 12 which is rotated and reciprocated by the engine, and pressure-feeds the fuel from a distribution boat 14 to the injection nozzle 2.

ポンプ室１３へは吸入通路１５より燃料を供給する。ま
たポンプ室１３内の余剰燃料は、ポンプの吸入側と吐出
側を連通ずる溢流通路１７より逃がすが、この通路１７
には２個の電磁弁２０．３０が設置されている。Fuel is supplied to the pump chamber 13 from a suction passage 15. Further, excess fuel in the pump chamber 13 is released through an overflow passage 17 that communicates the suction side and the discharge side of the pump.
Two solenoid valves 20 and 30 are installed.

電磁弁２０は電流を遮断すると開弁する常閉型のもので
あり、電磁弁３０は電流を遮断すると閉弁する常閉型の
ものであって、これらの電磁弁のうち一方が開弁すると
ポンプ室１３内の燃料がプログラム１２内の通路、溢流
通路１７を経て通路１８側へ逃げる（溢流する）ように
構成されている。これらの電磁弁２０．３０は電子制御
ユニット　（ＥＣＵ）５０により開閉が制御される。The solenoid valve 20 is a normally closed type that opens when the current is cut off, and the solenoid valve 30 is a normally closed type that closes when the current is cut off. The fuel in the pump chamber 13 is configured to escape (overflow) to the passage 18 side through the passage in the program 12 and the overflow passage 17. The opening and closing of these solenoid valves 20 and 30 is controlled by an electronic control unit (ECU) 50.

着火センサ４１は、エンジン燃焼室内の燃料着火光を検
出するもので、第２図に示すように受光部４１ａに燃料
着火光が入射するとガラス棒４１ｂを経てフォトトラン
ジスタに受光され着火信号を発生するような構成のもの
である。The ignition sensor 41 detects the fuel ignition light in the engine combustion chamber, and as shown in FIG. 2, when the fuel ignition light enters the light receiving section 41a, it is received by the phototransistor through the glass rod 41b and generates an ignition signal. The structure is as follows.

回転センサ４２はエンジン（燃料噴射ポンプＩＯ）の回
転数を検出するものであり、アクセルセンサ４３は自動
車のアクセル位置を検出するものである。The rotation sensor 42 detects the rotation speed of the engine (fuel injection pump IO), and the accelerator sensor 43 detects the accelerator position of the automobile.

吸気圧センサ４４は、エンジン１の吸気圧を検出するも
の、吸気温センサ４５はエンジン１の吸入空気の温度を
検出するもの、水温センサ４６はエンジン１の冷却水温
を検出するもの、電圧センサ４７は電源をなすバッテリ
の電圧を検出するものである。The intake pressure sensor 44 detects the intake pressure of the engine 1, the intake temperature sensor 45 detects the temperature of the intake air of the engine 1, the water temperature sensor 46 detects the cooling water temperature of the engine 1, and the voltage sensor 47. Detects the voltage of the battery that serves as the power source.

ＥＣＵ３Ｏは、マイクロコンピュータシステムで構成さ
れており、いずれも■ｃからなるＣＰＵ５１、ＲＯＭ５
２、ＲＡＭ５３、及びＡ／Ｄ変換器５４を有している。The ECU3O is composed of a microcomputer system, which includes a CPU51, a ROM5, and
2, a RAM 53, and an A/D converter 54.

またセンサ４１，４２からの信号を受ける波形整形回路
５５．５６及びＣＰＵ５１からの信号を増幅して電磁弁
２０．３０の駆動電流を制御する駆動回路５７．５８を
有している。It also includes waveform shaping circuits 55 and 56 that receive signals from the sensors 41 and 42, and drive circuits 57 and 58 that amplify signals from the CPU 51 and control the drive current of the electromagnetic valves 20 and 30.

ＲＯＭ５２には処理を実行するためのプログラムが予め
格納されている。またＲＯＭ５２には第３図に図示する
ような噴射量特性ガバナパターンに対応する基本噴射量
データが第４図に示すような２次元マツプ、即ちドライ
ブシャフトの回転数Ｎデータとアクセル位置αデータと
でアドレス指定されるアドレスに対応する基本噴射量Ｑ
ｐ（Ｎ、α）データをストアしてなる記憶パターンとし
て、予め格納されている。さらに、ＲＯＭ５２には第５
図に示す如き補正噴射量ＱＰＣと回転数とでアドレス指
定されるアドレスに対応する目標噴射帰還ＱＴ　（Ｎ、
Ｑ）データが予め格納されている。A program for executing processing is stored in the ROM 52 in advance. The ROM 52 also contains basic injection amount data corresponding to the injection amount characteristic governor pattern as shown in FIG. 3, as well as a two-dimensional map as shown in FIG. The basic injection amount Q corresponding to the address specified by
It is stored in advance as a storage pattern formed by storing p(N, α) data. Furthermore, the ROM 52 has a fifth
Target injection feedback QT (N,
Q) Data is stored in advance.

同様にＲＯＭ１４には第６図に示すような目標着火時期
データが、ドライブシャフトの回転数Ｎデータと補正噴
射量ＱＰｃデータとでアドレス指定されるアドレスに基
本着火時ｗｇＴｐ　（Ｎ、Ｑｐｃ）データを２次元マツ
プとしてストアしてなる記１゜αパターンとして、予め
格納されている。さらに同様にＲＯＭ１４には第７図に
示すような補正着火時期ＴＰＯと回転数Ｎデータとでア
ドレス指定されるアドレスに対応する目標噴射開始時期
ＴＴ（Ｎ、Ｔｐｃ）データをストアしてなる記憶パター
ンとして予め格納している。Similarly, target ignition timing data as shown in FIG. 6 is stored in the ROM 14, and basic ignition time wgTp (N, Qpc) data is stored in the address specified by the drive shaft rotational speed N data and corrected injection amount QPc data. The pattern is stored in advance as a 1°α pattern stored as a two-dimensional map. Furthermore, similarly, the ROM 14 stores a memory pattern in which target injection start timing TT (N, Tpc) data corresponding to the address specified by the corrected ignition timing TPO and rotation speed N data as shown in FIG. 7 is stored. It is stored in advance as .

第８図に駆動回路５７．５８の例を示す。ｌ・ランジス
タＴｒをＯＮすることにより電磁弁２０又は３０に電流
が流れ、Ｏ，Ｆ　Ｆすることにより電流が遮断される。FIG. 8 shows an example of the drive circuits 57 and 58. By turning on the transistor Tr, a current flows through the solenoid valve 20 or 30, and by turning it off and on, the current is cut off.

この遮断された時に電磁弁のコイル両端には逆起電力が
発生してトランジスタＴｒを破壊するおそれがある。こ
のためトランジスタＴｒと並列にコンデンサＣ１抵抗Ｒ
が接続されこのＣ，Ｒの値を適当に選ぶことにより、逆
起電力をトランジスタの耐圧以下におさえ、かつできる
限り高速に電磁弁の電流を遮断することが可能となる。When the solenoid valve is shut off, a back electromotive force is generated at both ends of the coil of the solenoid valve, which may destroy the transistor Tr. Therefore, capacitor C1 resistor R is connected in parallel with transistor Tr.
By appropriately selecting the values of C and R, it is possible to suppress the back electromotive force below the withstand voltage of the transistor and to cut off the current of the solenoid valve as quickly as possible.

常開型電磁弁２０は第９図に示すようにコイル２１を保
持し電磁回路を形成するコア２２、可動部分であるムー
ビングコア２３、ムービングコア２３と直結されるロッ
ド２，４、ロッド２４に連結された弁体２６、溢流通路
１７に通じるボート２７Ａ、通路１８側の通路２８Ｂ、
及び弁座２７Ｃを有するボディ２７、及びリターンスプ
リング２８から構成されている。ムービングコア２３及
びロッド２４は、コイル２１に通電されると矢印Ａの方
向に動き閉弁する。電流が遮断されるとスプリング２８
の力により開弁状態となる。As shown in FIG. 9, the normally open solenoid valve 20 includes a core 22 that holds a coil 21 and forms an electromagnetic circuit, a moving core 23 that is a movable part, rods 2 and 4 that are directly connected to the moving core 23, and a rod 24. A connected valve body 26, a boat 27A communicating with the overflow passage 17, a passage 28B on the passage 18 side,
, a body 27 having a valve seat 27C, and a return spring 28. When the coil 21 is energized, the moving core 23 and the rod 24 move in the direction of arrow A and close the valve. When the current is interrupted, the spring 28
The valve opens due to force.

常閉型電磁弁３０は、第１０図に示すようコイル３１を
保持し磁気回路を形成するコア３２、可動部分であるム
ービングプレート３３、このプレート３３と直結された
ロッド３４、このロッド３４の先端に形成されたニード
ル弁体３６、溢流通路１７に通じるボー）３７Ａ、低圧
通路１８例の通路３７Ｂ、及び弁座３７Ｇを有するボデ
ィ３７及びスプリング３８から構成されている。As shown in FIG. 10, the normally closed solenoid valve 30 includes a core 32 that holds a coil 31 and forms a magnetic circuit, a moving plate 33 that is a movable part, a rod 34 that is directly connected to this plate 33, and a tip of this rod 34. The body 37 includes a needle valve body 36 formed in the body 36, a bow 37A communicating with the overflow passage 17, a passage 37B of 18 low pressure passages, a valve seat 37G, and a spring 38.

しかして、コイル３１に通電されるプレート３３トロソ
ド３４は矢印Ｂ方向に移動して開弁し、通電が遮断され
名とスプリング３８のばねで開ＩＭｊ状態とある。As a result, the plate 33 and the trosode 34, which are energized to the coil 31, move in the direction of the arrow B and open, and the energization is cut off and the spring 38 is in the open state.

次に本発明の作動を第１１図及び第１２Ａ図〜第１２Ｅ
図に示すフローチャー１・にもとづき説明する。Next, the operation of the present invention will be explained in FIGS. 11 and 12A to 12E.
The explanation will be based on flowchart 1 shown in the figure.

まず自動車のキースイッチがＯＮされると、第１１図に
示すメインルーチンがスタートし、ステップ１０１にて
マイクロコンピュータの人出力、ＲＡＭ、割込等の初期
化を行う。次にステップ１０２で各種センサ４１〜４７
からの信号をＡ／Ｄコンバータ５４及び波形整形回路５
５．５６を介してマイクロコンピュータ内へ取り込む。First, when the key switch of the automobile is turned on, the main routine shown in FIG. 11 starts, and in step 101, the microcomputer's human output, RAM, interrupts, etc. are initialized. Next, in step 102, various sensors 41 to 47 are
The signal from the A/D converter 54 and the waveform shaping circuit 5
5.56 into the microcomputer.

次にステップ１０３にて、回転基準信号割込ルーチンで
得られた回転数Ｎと、ステップ１０２で取り込まれたア
クセルセンサ信号αとから第４図に示すマツプを利用し
て基本噴射量ＱＰを４点補間にて算出する。Next, in step 103, the basic injection amount QP is calculated by using the map shown in FIG. Calculated using point interpolation.

次にステップ１０４で、ステップ１０２で取り込まれた
吸気温、吸気圧、冷却氷温により噴射量ＱＰを補正して
補正噴射量ＱＰＣを算出する。次にステップ１０５にて
、回転ＩＮと補正噴射量Ｑｐｃとから、第５図に示すマ
ツプを利用し４点補間にて目標噴射期間Ｑｒを算出する
。Next, in step 104, the injection amount QP is corrected based on the intake air temperature, intake pressure, and cooling ice temperature taken in step 102, and a corrected injection amount QPC is calculated. Next, in step 105, a target injection period Qr is calculated from the rotation IN and the corrected injection amount Qpc by four-point interpolation using the map shown in FIG.

次にステップ１０６にて回転数Ｎと補正噴射量ＱＰＣと
より第６図に示すマツプにより、４点補間にて、目標着
火時期ＴＰを算出する。次にステップ１０７にて、目標
着火時期ＴＰを吸気温、吸気圧、冷却水温により補正し
、補正着火時期ＴＰＯをめる。次にステップ１０８にて
回転数Ｎと、補正着火時期Ｔｐｃとから第７図に示すマ
ツプにより４点補間で、目標ｇ射開始時期ＴＴをめる。Next, in step 106, a target ignition timing TP is calculated using a map shown in FIG. 6 using the rotational speed N and the corrected injection amount QPC through four-point interpolation. Next, in step 107, the target ignition timing TP is corrected based on the intake air temperature, intake pressure, and cooling water temperature, and a corrected ignition timing TPO is determined. Next, in step 108, the target g-injection start timing TT is determined by four-point interpolation from the rotational speed N and the corrected ignition timing Tpc using a map shown in FIG.

ＴＴは回転基準信号が人力されてからどれだけの時間後
に燃料の噴射を始めるために、電磁弁３０の電流を遮断
したらよいかを意味する。TT means how long after the rotation reference signal is input manually, the current to the solenoid valve 30 should be cut off in order to start fuel injection.

次にステップ１０９で着火信号が正常に入力されている
かどうかを判定して、入力されていればステップ１１０
で実着火時期と補正着火時期とのＷＡ差に応じて、この
ｆＩ：４差をゼロにするべく目標噴射開始時期を補正し
て補正噴射開始時期ＴＴｏをめる。一方ステップ１０９
で、着火信号が正常に入力されてないと判定されたなら
ば、プログラムは、ステップ１１１へ進んで噴射開始時
期ＴＴをそのまま補正噴射開始時期ＴＴｃとする。異常
の処理を行なった後、プログラムは再びステップ１０２
へと戻り、以下同様にくりかえず。Next, in step 109, it is determined whether the ignition signal is input normally, and if it is input, step 110
Then, according to the WA difference between the actual ignition timing and the corrected ignition timing, the target injection start timing is corrected to set the corrected injection start timing TTo in order to make this fI:4 difference zero. Meanwhile step 109
If it is determined that the ignition signal is not input normally, the program proceeds to step 111 and sets the injection start time TT as the corrected injection start time TTc. After processing the abnormality, the program returns to step 102.
Return to , and repeat the same process.

このように、メインルーチンをくりかえし行なっている
時に第１３図（１）に示すように時刻ＴＨｉで回転セン
サ４２から信号がＣＰＵ５１に入力されると、プログラ
ムは１１２Ａ図に示すような回転基準信号割込ルーチン
に進む。まずステップ２０１で信号が入力された時のタ
イマカウンタの値ＴＮｉを読む。In this manner, when the main routine is repeated and a signal is input from the rotation sensor 42 to the CPU 51 at time THi as shown in FIG. 13(1), the program changes the rotation reference signal assignment as shown in FIG. Proceed to the loading routine. First, in step 201, the value TNi of the timer counter at the time when the signal was input is read.

次にステップ２０２で、前回のカウンタ値ＴＨｉ−１と
の差ΔＴＮをめ、このコンデンサΔＴＮから回転数Ｎを
計算する。次にステップ２０３でメインルーチンで計算
された１１０時間後に噴射始め割込みルーチンが発生す
るようにセットする。Next, in step 202, the difference ΔTN from the previous counter value THi-1 is determined, and the rotational speed N is calculated from this capacitor ΔTN. Next, in step 203, the injection start interrupt routine is set to occur after 110 hours calculated in the main routine.

次にステップ２０４で、時刻ＴＮｉから（Ｔｙ。Next, in step 204, from time TNi (Ty.

＋０丁）時間後に噴射終わり割込ルーチンが発生するよ
うにセントして割込みから戻る。次に時刻ＴＦｉで第１
３図（２）に示すように着火センサ４１から着火信号が
人力されると第１２Ｂ図に示すような着火割込ルーチン
が起動する。ここでは、ステップ３０１で、信号が入力
された時のタイマカウンタの値ＴＦｉを読み取る。次に
ステップ３０２でタイマー値ＴｒｉとタイマＴＮｉとの
差へＴ「ｉをめ、この差ΔＦｉと差ΔＴＮの値とから実
着火時期をめる。実着火期間が算出できたら、ＲＡＭの
所定番地にストアしてメインルーチンへ戻る。+0 digits) after which the injection end interrupt routine occurs and returns from the interrupt. Next, at time TFi, the first
When an ignition signal is manually input from the ignition sensor 41 as shown in FIG. 3(2), an ignition interrupt routine as shown in FIG. 12B is activated. Here, in step 301, the value TFi of the timer counter at the time the signal was input is read. Next, in step 302, calculate T'i to the difference between the timer value Tri and timer TNi, and calculate the actual ignition timing from the values of this difference ΔFi and the difference ΔTN. Once the actual ignition period has been calculated, Store and return to the main routine.

次に時刻（ＴＮｉ＋Ｔｒｃ）に回転基準割込ルーチンの
ステップ２０３でセントされた噴射始め割込みルーチン
が起動する。第１２Ｃ図で示すようにこの割込みではス
テップ４０１にて電磁弁３０の電流を遮断するべく駆動
回路５８に信号を出力してメインルーチンへと戻る。Next, at time (TNi+Trc), the injection start interrupt routine that was sent in step 203 of the rotation reference interrupt routine is activated. As shown in FIG. 12C, in step 401, a signal is output to the drive circuit 58 to cut off the current to the solenoid valve 30, and the process returns to the main routine.

次に時刻（ＴＮ　ｉ　＋ＴＴ　ｃ　＋’ＱＴ）に回転基
準割込みルーチンのステップ２０４でセットされた噴射
終わり割込みルーチンが発生する。第し２Ｄ図で示すよ
うにこの割込みルーチンではステップ５０１で電磁弁２
０の電流を遮断して、次にステップ５０２で電磁弁３０
の電流を導通さ（゛る。次にステップ５０３で時間Ｔｏ
後に電磁弁２０の閉弁割込ルーチンが起動するようにセ
ットしてメインルーチンへと戻る。ここで時間ＴＤは、
ステップ５０２で電流を導通させた電磁弁３０が完全に
開弁した後でかつ、次の回転位置信号が入力される可能
性のある時間より充分前に設定されるよう決めておく必
要がある。Next, at time (TN i +TT c +'QT), the injection end interrupt routine set in step 204 of the rotation reference interrupt routine occurs. As shown in FIG. 2D, in this interrupt routine, in step 501, the solenoid valve 2 is
0 current is cut off, and then in step 502 the solenoid valve 30
Then, in step 503, the time To
Afterwards, the valve closing interrupt routine for the solenoid valve 20 is set to start, and the process returns to the main routine. Here, the time TD is
It is necessary to determine that the setting should be made after the solenoid valve 30 to which the current was applied in step 502 is completely opened, and well before the time when the next rotational position signal is likely to be input.

次に時刻（Ｔ　Ｎ　ｉ　＋　Ｔ　丁Ｃ十Ｑ　７　＋　Ｔ
　ｏ　）にてステップ５０３で設定した関弁割込みルー
チンが起動し、第１２Ｅ図で示すようにステップ６０１
で電磁弁２０に電流を導通させると第１３図に示すよう
に電磁弁の応答遅れの後に閉弁する。そしてプログラム
はメインルーチンへ戻り同様のことを繰り返す。Next, time (T N i + T DingC0Q 7 + T
o), the related valve interrupt routine set in step 503 is started, and step 601 is started as shown in FIG. 12E.
When current is made to flow through the solenoid valve 20, the solenoid valve closes after a delay in response, as shown in FIG. The program then returns to the main routine and repeats the same process.

以上の動作により電磁弁２０．３０の開閉の様子を第１
３図（３）及び（４）に示す。目標燃料噴射開始時間（
Ｔ　Ｎ　Ｉ　＋　Ｔ　７　ｃ）より前では常閉型電磁弁
３０は第１３図（３）に示すように通電されて予め開弁
され、他方常閉型電磁弁２０も第１３図（４）に示すよ
うに通電されて予め閉弁されている。従って、高圧室１
３の燃料は通路１７、電磁弁２０を通って逃げ、燃料は
噴射されない。目標燃料噴射開始時期になると第１３図
（３）に示すように常閉型電磁弁２０の通電は遮断され
、速やかに電磁弁２０は閉弁し、燃料噴射が開始される
。Through the above operations, the opening and closing of the solenoid valve 20.30 can be seen as follows.
This is shown in Figure 3 (3) and (4). Target fuel injection start time (
Before T N I + T 7 c), the normally closed solenoid valve 30 is energized and opened in advance as shown in FIG. 13 (3), and the normally closed solenoid valve 20 is also opened as shown in FIG. 13 (4). As shown in the figure, the valve is energized and closed in advance. Therefore, hyperbaric chamber 1
3 escapes through the passage 17 and the solenoid valve 20, and no fuel is injected. When the target fuel injection start time comes, as shown in FIG. 13 (3), the normally closed electromagnetic valve 20 is de-energized, the electromagnetic valve 20 is immediately closed, and fuel injection is started.

そして、燃料噴射期間Ｑ、が経過して目標燃料噴射終了
時期（ＴＮ’ｉ　＋ＴＴ　Ｃ＋ＱＴ）になると第１３（
４１に示すように常開型電磁弁３０の電流が遮断されて
速やかに電磁弁３０が開弁し、燃料噴射が終了する。Then, when the fuel injection period Q has elapsed and the target fuel injection end time (TN'i +TT C+QT) is reached, the 13th (
As shown at 41, the current to the normally open electromagnetic valve 30 is cut off, and the electromagnetic valve 30 immediately opens to complete the fuel injection.

このとき、常閉電磁弁２０の通電も開始され、電磁弁２
０は開弁する。さらに所定時間Ｔｏ経過後に常開電磁弁
３０の通電も開始され、電磁弁３０は閉弁する。At this time, energization of the normally closed solenoid valve 20 is also started, and the solenoid valve 2
0 opens the valve. Further, after the predetermined time To has elapsed, energization of the normally open solenoid valve 30 is started, and the solenoid valve 30 is closed.

なお、第１２Ｄ図、第１２Ｅ図は別の割込ルーチンのよ
うに図示したが、どちらも電磁弁２０の制御が中心の割
込みであるので、ひとつの割込ルーチンを使用して、こ
の割込ルーチンの先頭で、電磁弁２０の開弁のための割
込か閉弁のための割込かを判断して、それぞれの処理ル
ーチンへ分岐する方法を取ってもよい。Although FIG. 12D and FIG. 12E are illustrated as separate interrupt routines, in both cases, the main interrupt is control of the solenoid valve 20, so one interrupt routine is used to handle this interrupt. At the beginning of the routine, it may be determined whether the interrupt is for opening or closing the electromagnetic valve 20, and branching to the respective processing routines may be adopted.

また、電磁弁３０の開弁を、電磁弁２０の閉弁割込ルー
チン内で処理しているが、電磁弁２０の開弁割込ルーチ
ンと同じように、噴射終り割込ルーチンの一定時間後に
電磁弁３０の開弁処理う行なう割込を設定してもよい。In addition, the opening of the solenoid valve 30 is processed within the valve closing interrupt routine of the solenoid valve 20, but similarly to the valve opening interrupt routine of the solenoid valve 20, after a certain period of time of the end of injection interrupt routine, An interrupt for opening the solenoid valve 30 may be set.

また、噴射始割込ルーチン内で、噴射終わり割込ルーチ
ンと同し時刻に電磁弁３０開弁割込ルーチンが発生する
ようにセットする方法でもよい。Alternatively, the solenoid valve 30 opening interrupt routine may be set to occur within the injection start interrupt routine at the same time as the injection end interrupt routine.

なお、本実施例に加えて、Ｔ　７　Ｇ　−、Ｑ　Ｔ　Ｃ
の電源電圧補正を行なうことも可能である。In addition to this example, T 7 G −, Q T C
It is also possible to perform power supply voltage correction.

また、本実施例では分配型ポンプについて応用したもの
を示したが、判型ポンプについても同様に利用できる。Further, although this embodiment shows an application to a distribution type pump, the present invention can be similarly applied to a size type pump.

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

第１図はこの発明の一実施例を示す構成図、第２図は第
１図図示の着火センサを示す断面図、第３図は基本喰射
量の特性図、第４図、第５図、第６図、第７図はそれぞ
れ作動説明に供するグラフ、第８図は第１図図示の駆動
回路を示す回路図、第９図は第１図図示の常開型電磁弁
を示す断面図、第１０図は第１図図示の常閉型電磁弁を
示す断面図、第１１図、第１２Ａ図〜第１２Ｅ図は作動
説明に供するフローチャート、第１３図は作動説明に供
するタイミングチャートである。 １０・・・燃料喰射ポンプ、１７・・・溢流通路、２０
・・・常開型電磁弁、３０・・・常閉型電磁弁、５０・
・・制御ユニット。 代理人弁理士　岡　部　隆 第２図 第３図 回転数（ｒｐｍ） 第４図 ■ 第５図 ｐｃ Ｎ１−−−一−−−Ｎｍ　−一−−−−−−Ｎｎ　Ｎ刈
谷市昭和町１丁目１番地比 電装株式会社内 ０発　明　者　益田間 刈谷市昭和町１丁目１番地日。 電装株式会社内Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 is a sectional view showing the ignition sensor shown in Fig. 1, Fig. 3 is a characteristic diagram of the basic radiation amount, Figs. 4 and 5. , FIG. 6 and FIG. 7 are graphs for explaining the operation, respectively. FIG. 8 is a circuit diagram showing the drive circuit shown in FIG. 1, and FIG. 9 is a sectional view showing the normally open type solenoid valve shown in FIG. 1. , FIG. 10 is a sectional view showing the normally closed solenoid valve shown in FIG. 1, FIGS. 11 and 12A to 12E are flow charts for explaining the operation, and FIG. 13 is a timing chart for explaining the operation. . 10...Fuel injection pump, 17...Overflow passage, 20
... Normally open type solenoid valve, 30... Normally closed type solenoid valve, 50.
··Controller unit. Representative Patent Attorney Takashi Okabe Figure 2 Figure 3 Rotation speed (rpm) Figure 4 ■ Figure 5 pc N1---1---Nm -1---Nn N1 Showa-cho, Kariya City 1-chome, Hidenso Co., Ltd. Inventor: 1-1 Showa-cho, Kariya-shi, Masuda. Within Denso Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] （１）燃料噴射ポンプの溢流通路に配設された常閉型電
磁弁と、前記溢流通路に配設された常開型電磁弁と、前
記燃料噴射ポンプによる目標燃料噴射開始時期、目標燃
料噴射終了時期を演算して前記常開型電磁弁及び常閉型
電磁弁を制御する制御ユニットを備えることを特徴とす
る燃料噴射装置。(1) A normally closed solenoid valve disposed in the overflow passage of the fuel injection pump, a normally open solenoid valve disposed in the overflow passage, and a target fuel injection start timing and target by the fuel injection pump. A fuel injection device comprising: a control unit that calculates fuel injection end timing and controls the normally open solenoid valve and the normally closed solenoid valve. （２）前記制御ユニットは、目標燃料噴射開始時期より
前に前記常開型電磁弁通電して閉弁させると共に目標燃
料噴射時期に前記常閉型電磁弁の通電を遮断して閉弁さ
せ、かつ目標燃料噴射終了時期に前記常開型電磁弁の通
電を遮断して開弁させ、前記常閉型電磁弁を通電して開
弁させるよう構成されている特許請求の範囲第１項記載
の燃料噴射装置。(2) The control unit energizes the normally-open solenoid valve to close it before the target fuel injection start time, and de-energizes the normally-closed solenoid valve to close it at the target fuel injection time; Further, at the target fuel injection end timing, the normally open solenoid valve is de-energized to open the valve, and the normally-closed solenoid valve is energized to open the valve. Fuel injection device.
JP12278083A 1983-07-05 1983-07-05 Fuel injection device Pending JPS6013951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12278083A JPS6013951A (en) 1983-07-05 1983-07-05 Fuel injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12278083A JPS6013951A (en) 1983-07-05 1983-07-05 Fuel injection device

Publications (1)

Publication Number Publication Date
JPS6013951A true JPS6013951A (en) 1985-01-24

Family

ID=14844422

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12278083A Pending JPS6013951A (en) 1983-07-05 1983-07-05 Fuel injection device

Country Status (1)

Country Link
JP (1) JPS6013951A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2604218A1 (en) * 1986-09-23 1988-03-25 Orange Gmbh FUEL INJECTION PUMP.
CN1113488C (en) * 1996-11-26 2003-07-02 三洋电机株式会社 Base station for mobile communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2604218A1 (en) * 1986-09-23 1988-03-25 Orange Gmbh FUEL INJECTION PUMP.
CN1113488C (en) * 1996-11-26 2003-07-02 三洋电机株式会社 Base station for mobile communication system

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