JPS5960072A - Fuel supplying device for engine - Google Patents

Fuel supplying device for engine

Info

Publication number
JPS5960072A
JPS5960072A JP57170522A JP17052282A JPS5960072A JP S5960072 A JPS5960072 A JP S5960072A JP 57170522 A JP57170522 A JP 57170522A JP 17052282 A JP17052282 A JP 17052282A JP S5960072 A JPS5960072 A JP S5960072A
Authority
JP
Japan
Prior art keywords
engine
fuel injection
pulsation
intake
signal
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
JP57170522A
Other languages
Japanese (ja)
Other versions
JPH0819872B2 (en
Inventor
Yasufumi Tsunetomi
常富　容史
Akira Takahashi
晃 高橋
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.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP57170522A priority Critical patent/JPH0819872B2/en
Publication of JPS5960072A publication Critical patent/JPS5960072A/en
Publication of JPH0819872B2 publication Critical patent/JPH0819872B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02D41/30—Controlling fuel injection
    • F02D41/32—Controlling fuel injection of the low pressure type
    • F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration
    • F02D41/345—Controlling injection timing
    • 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

Abstract

PURPOSE:To permit to supply the fuel with a good accuracy by a method wherein the pulsation of suction air is detected and fuel injection is effected in synchronizing with the pulsation of the suction air. CONSTITUTION:A boost sensor 12 for a suction air pulsation detector detecting the pulsation of the suction air of the engine E is provided by detecting a vacuum in the inflated part 3a of a suction path 3 by a static pressure. The high- frequency element of a signal from the boost sensor 12 is filtrated by a high- frequency filter 13. A trigger signal generator 14 receives a signal Sb and generates a trigger signal Sc when a suction vacuum is reduced (or the flow amount of the suction air is much), while the generating timing of this trigger signal Sc is synchronized substantially with the revolving number of the engine. According to this method, the fuel may be supplied with a good accuracy.

Description

【発明の詳細な説明】 本発明は、エンジンの燃料供給装置に関する。[Detailed description of the invention] The present invention relates to an engine fuel supply device.

従来より、燃料噴射部をそなえたエンジンにおいて、そ
の燃料供給を電子制御できるようにしたものが各種開発
されている。2. Description of the Related Art Conventionally, various engines have been developed that are equipped with a fuel injection section and whose fuel supply can be electronically controlled.

しかしながら、従来のこの種のエンジン燃料供給装置で
は、いずれも電子制御のために多くのセンサ類を必要と
し、これにより全体構造の複雑化を招くとともに、コス
ト高を招くという問題点がある。However, all conventional engine fuel supply systems of this type require a large number of sensors for electronic control, which causes the overall structure to become complicated and increases costs.

本発明は、このような問題点を解決しようとするもので
、簡素な構成でしかも十分な精度の燃料供給制御を行な
えるようにした、エンジンの燃料供給装置を提供するこ
とを目的とする。SUMMARY OF THE INVENTION The present invention aims to solve these problems, and it is an object of the present invention to provide a fuel supply system for an engine that has a simple configuration and can perform fuel supply control with sufficient accuracy.

このため、本発明のエンジンの燃料供給装置は、燃料噴
射部をそなえたエンジンにおいて、上記エンジンの吸気
脈動を検出する吸気脈動検出器が設けられ、上記吸気脈
動に同期して上記燃料噴射部から燃料噴射を行なわせる
べく、上記吸気脈動検出器からの信号を受けてこの信号
から上記吸気脈動に同期した燃料噴射信号を上記燃料噴
射部へ出力する制御機構が、上記の吸気脈動検出器と燃
料噴射部との間に介装されたことを特徴としている。Therefore, in the engine fuel supply device of the present invention, an intake pulsation detector for detecting the intake pulsation of the engine is provided in an engine equipped with a fuel injection section, and the fuel injection section is supplied from the fuel injection section in synchronization with the intake pulsation. In order to perform fuel injection, a control mechanism receives a signal from the intake pulsation detector and outputs a fuel injection signal synchronized with the intake pulsation from this signal to the fuel injection section, which connects the intake pulsation detector and the fuel. It is characterized by being interposed between it and the injection part.

以下、図面により本発明の一実施例としてのエンジンの
燃料供給装置について説明すると、第１図はその全体の
概略構成を示す模式図、第２図（ａ）〜（Ｃ）および第
６図（ａ）、（ｂ）はいずれもその作用を説明するだめ
の波形図である。Hereinafter, an engine fuel supply system as an embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is a schematic diagram showing the overall configuration, FIGS. Both a) and (b) are waveform diagrams for explaining the effect.

第１図に示すごとく、例えば４気筒エンジンＥにおける
各気筒の燃焼室１には、吸気弁５を介して吸気通路３が
連通接続されるとともに、排気弁６を介して排気通路４
が連通接続されている。As shown in FIG. 1, for example, an intake passage 3 is connected to the combustion chamber 1 of each cylinder in a four-cylinder engine E through an intake valve 5, and an exhaust passage 4 is connected through an exhaust valve 6.
are connected.

また、各気筒へ通じる吸気マニホルドの集合部には、燃
料噴射弁（燃料噴射部）９が設けられている。Further, a fuel injection valve (fuel injection section) 9 is provided at a gathering portion of the intake manifold leading to each cylinder.

ところで、吸気通路６の膨大部６ａ内の負圧を静圧で検
出してエンジンＥの吸気脈動を検出する吸気脈動検出器
としてのブーストセンサ１２が設けられており、このブ
ーストセンサ１２からの出力信号Ｓａ（第２図（ａ）参
照〕は、高周波フィルタ１３で高調波成分を濾波されて
、信号Ｓａと同位相あるいはほぼ同位相の信号ｓｂ［第
２図（ｂ）参照〕として出力され、この信号ｓｂがトリ
ガ信号発生器１４と絶対圧検出器１５とに入力される。By the way, a boost sensor 12 is provided as an intake pulsation detector that detects the intake pulsation of the engine E by statically detecting the negative pressure in the enlarged portion 6a of the intake passage 6. The signal Sa (see FIG. 2(a)) has its harmonic components filtered out by a high-frequency filter 13, and is output as a signal sb (see FIG. 2(b)) having the same phase or almost the same phase as the signal Sa. This signal sb is input to the trigger signal generator 14 and the absolute pressure detector 15.

トリガ信号発生器１４は、信号Ｓｂを受けて、吸気負圧
が低下しているとき（吸気流量の多いとき）にトリガ信
号ＳＣ〔第２図（Ｃ）参照〕を発生するもので、とのト
リガ信号Ｓｃの発信タイミングは、エンジン回転数にほ
ぼ同期している。The trigger signal generator 14 receives the signal Sb and generates a trigger signal SC [see FIG. 2(C)] when the intake negative pressure is decreasing (when the intake flow rate is large). The transmission timing of the trigger signal Sc is approximately synchronized with the engine rotation speed.

寸だ、絶対圧検出器１５は信号Ｓｂを整流して平均値を
検出するもので、との検出器１５からの出力はエンジン
負荷に対応している。The absolute pressure detector 15 rectifies the signal Sb and detects the average value, and the output from the absolute pressure detector 15 corresponds to the engine load.

さらに、トリガ信号発生器１４および絶対圧検出器１５
からの信号は、制御機構を構成するコンピュータ１６へ
入力される。このコンピュータ１６は、上記の各信号を
受けて、エンジンの運転状態を検出し、この運転状態に
応じた燃料噴射が行なわれるように、燃料噴射弁９へ燃
料噴射信号を出力する。Additionally, a trigger signal generator 14 and an absolute pressure detector 15
Signals from the computer 16 are input to a computer 16 that constitutes a control mechanism. The computer 16 receives the above signals, detects the operating state of the engine, and outputs a fuel injection signal to the fuel injection valve 9 so that fuel injection is performed according to the operating state.

このときの燃料噴射信号は、トリガ信号Ｓｃに同期して
出力されるので、燃料噴射弁９からの燃料噴射がエンジ
ンＥの吸気脈動に同期して行なわれ、更にこの噴射は吸
気負圧が低下しているとき、すなわち吸気流量の多いと
きに行なわれる。Since the fuel injection signal at this time is output in synchronization with the trigger signal Sc, fuel injection from the fuel injection valve 9 is performed in synchronization with the intake pulsation of the engine E, and furthermore, this injection is caused by a decrease in intake negative pressure. This is done when the intake air flow is high.

このように、吸気脈動に同期して噴射が行なわれるので
、簡素な構成で、運転状態に応じた的確な燃料噴射を行
なえるほか、噴射が吸気流量の多い吸気負圧の低下して
いるときに行なわれるので、燃料霧化性能が大幅に向上
し、各気筒への燃料の分配性を改善することができる。In this way, the injection is performed in synchronization with the intake pulsation, so it is possible to perform accurate fuel injection according to the operating condition with a simple configuration, and the injection is performed when the intake air flow rate is high and the intake negative pressure is low. Therefore, the fuel atomization performance can be greatly improved, and the distribution of fuel to each cylinder can be improved.

なお、第１図中の符号２はピストン、７，８はそれぞれ
吸気弁５および排気弁６用のロッカアームを示しており
、符号１０はスロットル弁、１１はエアクリーナを示し
ている。In FIG. 1, reference numeral 2 represents a piston, 7 and 8 represent rocker arms for the intake valve 5 and exhaust valve 6, respectively, 10 represents a throttle valve, and 11 represents an air cleaner.

また、吸気マニホルドの集合部に、燃料噴射弁９を１つ
設ける代わりに、多気筒の吸気ポートにそれぞれ燃料噴
射弁を設けて、各燃料噴射弁からの燃料噴射の状態をそ
れぞれ制御することもできる。この場合、吸気系を第２
、第４気筒用と第２、第３気筒用との２つのグループに
わけ、各グループにエンジン吸気脈動検出器を設け、各
々のグループの吸気脈動に同期して燃料噴射が行なわれ
るか、あるいは２つのグループのうちの１つの吸気脈動
（グループの中の１気筒分の吸気脈動でも可）からこれ
に同期する第６図（ａ）に示すようなトリガ信号Ｓｃ’
を検出し、残りのグループの吸気脈動に同期するトリガ
信号ＳＣ″〔第６図（ｂ）参照〕は演算により算出して
求め、これらの信号ＳＣ′、Ｓｃ′／に基づきそれぞれ
のグループの吸気脈動に同期して燃料噴射を行なうよう
にしてもよい。Furthermore, instead of providing one fuel injection valve 9 in the gathering part of the intake manifold, fuel injection valves may be provided in each intake port of a multi-cylinder, and the state of fuel injection from each fuel injection valve may be controlled individually. can. In this case, the intake system
, divided into two groups, one for the fourth cylinder and one for the second and third cylinders, each group is provided with an engine intake pulsation detector, and fuel injection is performed in synchronization with the intake pulsation of each group, or A trigger signal Sc' as shown in FIG. 6(a) is generated in synchronization with the intake pulsation of one of the two groups (or the intake pulsation of one cylinder in the group).
The trigger signal SC'' [see Fig. 6(b)] which is synchronized with the intake pulsation of the remaining groups is calculated by calculation, and the intake pulse of each group is calculated based on these signals SC', Sc'/. Fuel injection may be performed in synchronization with the pulsation.

なお、第３図において、符号＋１　、４２　、す３およ
び４Ｐ４はそれぞれ第１．第２．第３および第４気筒用
のトリガ信号を示しており、符号１．．１．、け信号発
生間隔時間を示している。In FIG. 3, the symbols +1, 42, S3 and 4P4 are respectively 1st. Second. Trigger signals for the third and fourth cylinders are shown, with reference numerals 1. ．． 1. , indicates the signal generation interval time.

また、コンピュータ１６へは、トリガ信号発生器１４お
よび絶対圧検出器１５からの各信号のは７５ヘイグニツ
シヨンパルスに同期したエンジン回転数信号やスロット
ル開度等のエンジン負荷信号を入力して、これらのエン
ジン回転数信号やエンジン負荷信号を補助的に利用して
、燃料噴射制御の精度をあげることもできる。In addition, each signal from the trigger signal generator 14 and the absolute pressure detector 15 is inputted to the computer 16, and engine load signals such as an engine rotation speed signal and a throttle opening synchronized with 75 ignition pulses are inputted to the computer 16. It is also possible to improve the accuracy of fuel injection control by supplementarily using these engine speed signals and engine load signals.

なお、本装置は、４気筒エンジンのほか、その他の多気
筒エンジンにも適用できる。Note that this device can be applied not only to four-cylinder engines but also to other multi-cylinder engines.

以上詳述したように、本発明のエンジンの燃料供給装置
によれば、エンジンの吸気脈動を検出して、この吸気脈
動に同期した燃料噴射が行なわれるので、簡素な構成で
、しかも十分な精度の燃料供給制御を行なえる利点があ
る。As detailed above, according to the engine fuel supply device of the present invention, the intake pulsation of the engine is detected and fuel injection is performed in synchronization with this intake pulsation, so it has a simple configuration and has sufficient accuracy. This has the advantage of being able to control fuel supply.

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

図は本発明の一実施例としてのエンジンの燃料供給装置
を示すもので、第１図はその全体の概略構成を示す模式
図、第２図（ａ）〜（Ｃ）および第３図（ａ）、（ｂ）
はいずれもその作用を説明するための波形図である。 １・・燃焼室、２・・ピストン、６・・吸気通路、３ａ
・・吸気通路の膨大部、４・・排気通路、５・・吸気弁
、６・・排気弁、７，８・・ロッカアーム、９・燃料噴
射部としての燃料噴射弁、１０・・スロットル弁、１１
・・エアクリーナ、１２・・ブーストセンサ、１３・・
高周波フィルタ、１４・・トリガ信号発生器、１５・・
絶対圧検出器、１６・・制御機構を構成するコンピュー
タ、Ｅ・・エンジン。The figures show a fuel supply system for an engine as an embodiment of the present invention. FIG. 1 is a schematic diagram showing the overall configuration, FIGS. ), (b)
Both are waveform diagrams for explaining the effect. 1. Combustion chamber, 2. Piston, 6. Intake passage, 3a
... Enlarged portion of intake passage, 4. Exhaust passage, 5. Intake valve, 6. Exhaust valve, 7, 8.. Rocker arm, 9. Fuel injection valve as a fuel injection part, 10. Throttle valve. 11
...Air cleaner, 12...Boost sensor, 13...
High frequency filter, 14...Trigger signal generator, 15...
Absolute pressure detector, 16. Computer configuring the control mechanism, E. Engine.

Claims (1)

【特許請求の範囲】[Claims] 燃料噴射部をそなえたエンジンにおいて、上記エンジン
の吸気脈動を検出する吸気脈動検出器が設けられ、上記
吸気脈動に同期して上記燃料噴射部から燃料噴射を行な
わせるべく、上記吸気脈動検出器からの信号を受けてこ
の信号から上記吸気脈動に同期した燃料噴射信号を上記
燃料噴射部へ出力する制御機構が、上記の吸気脈動検出
器と燃料噴射部との間に介装されたことを特徴とする、
エンジンの燃料供給装置。In an engine equipped with a fuel injection section, an intake pulsation detector for detecting intake pulsation of the engine is provided, and in order to cause the fuel injection section to inject fuel in synchronization with the intake pulsation, the intake pulsation detector detects the intake pulsation of the engine. A control mechanism that receives the signal and outputs a fuel injection signal synchronized with the intake pulsation to the fuel injection unit from this signal is interposed between the intake pulsation detector and the fuel injection unit. and
Engine fuel supply system.
JP57170522A 1982-09-29 1982-09-29 Engine fuel supply Expired - Lifetime JPH0819872B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57170522A JPH0819872B2 (en) 1982-09-29 1982-09-29 Engine fuel supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57170522A JPH0819872B2 (en) 1982-09-29 1982-09-29 Engine fuel supply

Publications (2)

Publication Number Publication Date
JPS5960072A true JPS5960072A (en) 1984-04-05
JPH0819872B2 JPH0819872B2 (en) 1996-02-28

Family

ID=15906496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57170522A Expired - Lifetime JPH0819872B2 (en) 1982-09-29 1982-09-29 Engine fuel supply

Country Status (1)

Country Link
JP (1) JPH0819872B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4513817B2 (en) * 2007-02-21 2010-07-28 トヨタ自動車株式会社 Fuel injection control device for in-cylinder internal combustion engine

Also Published As

Publication number Publication date
JPH0819872B2 (en) 1996-02-28

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