JPH02283839A - Fuel injection device for internal combustion engine - Google Patents

Fuel injection device for internal combustion engine

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Publication number
JPH02283839A
JPH02283839A JP10621189A JP10621189A JPH02283839A JP H02283839 A JPH02283839 A JP H02283839A JP 10621189 A JP10621189 A JP 10621189A JP 10621189 A JP10621189 A JP 10621189A JP H02283839 A JPH02283839 A JP H02283839A
Authority
JP
Japan
Prior art keywords
injection pulse
fuel
injection
pulse width
output
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
JP10621189A
Other languages
Japanese (ja)
Inventor
Shinji Kato
進二 加藤
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP10621189A priority Critical patent/JPH02283839A/en
Publication of JPH02283839A publication Critical patent/JPH02283839A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To improve fuel consumption of an internal combustion engine and response by a method wherein based on a fundamental injection pulse of fuel, an extraordinary injection pulse, and a signal by means of which it is indicated whether or not fuel is under injection, ineffective injection pulse widths are cut back so as not to be overlapped with each other to generate a final injection pulse. CONSTITUTION:According to the running state of an internal combustion engine, a fundamental fuel pulse is outputted from a fundamental injection pulse output means 11. According to the acceleration state of the internal combustion engine, an extraordinary pulse is outputted from an extraordinary injection pulse output means 12 regardless of and in non-synchronism with the number of revolutions of the engine. Further, it is detected by a means 15 whether fuel is under injection at present. When a fundamental injection pulse is not under output at present, an extraordinary injection pulse produces a final injection pulse. When the fundamental injection pulse is under output at present, computation to subtract one ineffective injection pulse width from a total sum of fundamental and extraordinary injection pulse widths is effected, a computing result produces a final injection pulse width, which is outputted from a final injection pulse output means 13. Thereafter, according to an output from the means 13, fuel is injected from a fuel injection means 14.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は内燃機関の燃料噴射装置に関し、特に電子式コ
ントロールユニットを用いた燃料噴射装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fuel injection device for an internal combustion engine, and more particularly to a fuel injection device using an electronic control unit.

[従来の技術] 従来、この種の内燃機関の燃料噴射装置は、機関の運転
状態に応じて求められる基本噴射量の他に、機関の過渡
特性を向上させるために機関の加速状態に応じて燃料増
にを行ってきた。この燃料増量は機関の加速状態を検出
した直後に臨時噴射パルスとして出力される。このため
回転数に同期した出力である基本噴射パルスに対し、臨
時噴射パルスは回転数と非同期な出力となり、基本噴射
パルスと臨時噴射パルスが重なり合うタイミングか生し
てしまう。この場合従来の技術では、最終噴射パルス幅
−基本噴射パルス幅+臨時噴射バルス幅、としている。
[Prior Art] Conventionally, this type of fuel injection device for an internal combustion engine has, in addition to the basic injection amount required depending on the operating state of the engine, injected fuel according to the acceleration state of the engine in order to improve the transient characteristics of the engine. I have been increasing the amount of fuel. This fuel increase is output as a temporary injection pulse immediately after the acceleration state of the engine is detected. For this reason, with respect to the basic injection pulse, which is an output synchronized with the rotation speed, the temporary injection pulse is output asynchronously with the rotation speed, and the basic injection pulse and the temporary injection pulse are generated at an overlapping timing. In this case, in the conventional technique, final injection pulse width - basic injection pulse width + temporary injection pulse width is used.

[発明が解決しようとする課題] 上述した従来の内燃機関の燃料噴射装置では、噴射パル
ス幅は現在使用されている燃料噴射手段の主要部である
インジェクタの特性上、無効噴射パルス幅+実効噴射パ
ルス幅で構成されており、同一燃料量を噴射するにも、
現在インジェクタが閉じた状態であるか開いた状態であ
るかによって噴射パルス幅が異なった幅となってしまう
[Problems to be Solved by the Invention] In the above-mentioned conventional fuel injection device for an internal combustion engine, the injection pulse width is equal to the ineffective injection pulse width + the effective injection pulse width due to the characteristics of the injector, which is the main part of the currently used fuel injection means. It consists of a pulse width, and even if the same amount of fuel is injected,
The injection pulse width becomes different depending on whether the injector is currently in a closed or open state.

従って、上述した従来の臨時噴射では、最終噴射パルス
幅二基本噴射パルス幅+臨時噴射パルス幅=(基本実効
噴射パルス幅+無効噴射パルス幅)+(臨時実効噴射パ
ルス幅+無効噴射パルス幅)となり、1回の噴射パルス
幅の中に無効噴射パルス幅が2つあり、本来噴射すべき
燃料量より多く燃料を噴射しているので、機関の燃費を
増加させ、応答性を低下させる原因の一つとなるという
欠点がある。
Therefore, in the above-mentioned conventional temporary injection, final injection pulse width 2 basic injection pulse width + temporary injection pulse width = (basic effective injection pulse width + invalid injection pulse width) + (temporary effective injection pulse width + invalid injection pulse width) Therefore, there are two invalid injection pulse widths in one injection pulse width, and more fuel is injected than the amount of fuel that should be injected, which increases the fuel consumption of the engine and reduces responsiveness. There is a drawback to being one.

そこで本発明は、上記の欠点を解消し、機関の省燃費と
応答性の向上を実現する内燃機関の燃料噴射装置を提供
することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel injection device for an internal combustion engine that eliminates the above-mentioned drawbacks and achieves fuel efficiency and improved response of the engine.

[課題を解決するための手段] 本発明の内燃機関の燃料噴射装置は、 前記内燃機関の運転状態に応じて基本燃料量を出力する
基本噴射パルス出力手段と、 前記内燃機関の加速状態に応じて、その回転数とは無関
係に非同期的に燃料量を出力する臨時噴射パルス出力手
段と、 現在燃料を噴射中であるか否かを検出する燃料噴射中検
出手段と、 前記基本噴射パルス出力手段の出力信号、前記臨時噴射
パルス出力手段の出力信号および前記燃料噴射中検出手
段の出力信号により現在基本噴射パルスが出力中でない
場合は臨時噴射パルスをそのまま最終噴射パルスとし、
現在基本噴射パルスが出力中である場合は、基本噴射パ
ルス幅と臨時噴射パルス幅との和から1つの無効噴射パ
ルス幅を除く演算を行ってこれを最終噴射パルス幅とし
て出力する最終噴射パルス出力手段と、前記最終噴射パ
ルス出力手段の出力信号に応して燃料を噴射する燃料噴
射手段とを備えている。
[Means for Solving the Problems] A fuel injection device for an internal combustion engine according to the present invention includes: a basic injection pulse output unit that outputs a basic fuel amount depending on the operating state of the internal combustion engine; temporary injection pulse output means for outputting a fuel amount asynchronously regardless of the rotation speed; fuel injection detecting means for detecting whether fuel is currently being injected; and the basic injection pulse output means. If the basic injection pulse is not currently being output based on the output signal of the temporary injection pulse output means, and the output signal of the fuel injection detecting means, the temporary injection pulse is directly used as the final injection pulse,
If the basic injection pulse is currently being output, a final injection pulse output is performed that removes one invalid injection pulse width from the sum of the basic injection pulse width and the temporary injection pulse width, and outputs this as the final injection pulse width. and fuel injection means for injecting fuel in response to the output signal of the final injection pulse output means.

[作 用] このように、基本噴射パルス出力手段、臨時噴射パルス
出力手段および燃料噴射中検出手段から出力される信号
を最終噴射パルス出力手段が受け、無効噴射パルス幅を
少なくするように演算して得た最終噴射パルス幅の信号
を燃料噴射手段に送り、燃料噴射手段はこの信号に従っ
て最終燃料噴射量を制御することにより、無効燃料噴射
量は削減される。
[Function] In this way, the final injection pulse output means receives the signals output from the basic injection pulse output means, the temporary injection pulse output means, and the fuel injection detecting means, and calculates the signals to reduce the invalid injection pulse width. The ineffective fuel injection amount is reduced by sending the obtained final injection pulse width signal to the fuel injection means and controlling the final fuel injection amount in accordance with this signal.

[実施例] 次に、本発明の一実施例について図面を参照して説明す
る。
[Example] Next, an example of the present invention will be described with reference to the drawings.

第1図は本発明の内燃機関の燃料噴射装置の実施例のブ
ロック図、第2図は本実施例の主要部の構成図である。
FIG. 1 is a block diagram of an embodiment of a fuel injection system for an internal combustion engine according to the present invention, and FIG. 2 is a block diagram of the main parts of this embodiment.

第1図に示すように、本発明の内燃機関の燃料噴射装置
は、基本噴射パルス出力手段11、臨時噴射パルス出力
手段12、燃料噴射中検出手段15を備え、またこれら
から出力される信号を受けて演算し、最終噴射燃料量に
対応するパルス幅の信号を出力する最終噴射パルス出力
手段13並びにこの最終噴射燃料・量に対応するパルス
幅の信号を受けて燃料の最終噴射量を制御する燃料噴射
手段14とを備えている。
As shown in FIG. 1, the fuel injection device for an internal combustion engine of the present invention includes a basic injection pulse output means 11, a temporary injection pulse output means 12, and a fuel injection detecting means 15, and the signals outputted from these are Final injection pulse output means 13 receives and calculates and outputs a signal with a pulse width corresponding to the final injected fuel amount, and receives a signal with a pulse width corresponding to this final injected fuel amount to control the final injection amount of fuel. The fuel injection means 14 is also provided.

また、第1図に示されている本発明の内燃機関の燃料噴
射装置の実施例は、第2図に示すように、モータシリン
ダ1とコントロールユニット21を有している。そして
、モータシリンダ1はインジェクタ24とブースト圧セ
ンサ26を備える吸気管5.吸気弁6、点火栓4、排気
管7、排気弁8.2つのピストンソング2Aを有するピ
ストン2、コネクティングロッド9、コネクティングロ
ッド9により内回転させられる回転円板3を含んでいる
。また、コントロールユニット21はCPU211、メ
モリ212、インタフェース213を有し1回転円板3
の回転数を検出する電磁ピックアップ25と、吸気管5
内のブースト圧を検出するブースト圧センサ26と、燃
料噴射バルス幅に対応する燃料を噴射するインジェクタ
24とに電気的に接続され、これらから送られる13号
を演算または処理し、モータシリンダ1か無効燃料の消
費を削餞して動作すようにjiilJ御する。
Further, the embodiment of the fuel injection device for an internal combustion engine of the present invention shown in FIG. 1 has a motor cylinder 1 and a control unit 21, as shown in FIG. The motor cylinder 1 has an intake pipe 5. which includes an injector 24 and a boost pressure sensor 26. It includes an intake valve 6, a spark plug 4, an exhaust pipe 7, an exhaust valve 8, a piston 2 having two piston songs 2A, a connecting rod 9, and a rotating disk 3 internally rotated by the connecting rod 9. Further, the control unit 21 has a CPU 211, a memory 212, an interface 213, and a one-rotation disk 3.
an electromagnetic pickup 25 that detects the rotational speed of the intake pipe 5;
It is electrically connected to a boost pressure sensor 26 that detects the boost pressure in the motor cylinder 1, and an injector 24 that injects fuel corresponding to the fuel injection pulse width, and calculates or processes the No. 13 sent from these to the motor cylinder 1. Control the engine so that it operates while reducing the consumption of ineffective fuel.

そして、第1図の内燃機関の燃料噴射装置の実施例のブ
ロック図と第2図の本実施例の構成図との関係を次に説
明する。
Next, the relationship between the block diagram of the embodiment of the fuel injection device for an internal combustion engine shown in FIG. 1 and the configuration diagram of the present embodiment shown in FIG. 2 will be explained.

第1図の基本噴射パルス出力手段11は回転円板3の回
転数を検出する電磁ピックアップ25、インジェクタ2
4、ブースト圧センサ26、モータシリンダ1のそれぞ
れとコントロールユニット21との連携により構成され
る。また、第1図の臨時噴射パルス出力手段は、インジ
ェクタ24、ブースト圧センサ26、モータシリンダ1
のそわぞわとコントロールユニット21との連携により
構成される。また、第1図の燃料噴射巾検出手段は、イ
ンジェクタ24、モータシリンダ1のそれぞれとコント
ロールユニット21どノ連携により構成される。第1図
の燃料噴射手段はインジェクタ24、モータシリンダ1
とコントロールユニット21との連携により構成される
。そして第1図の最終噴射パルス出力手段13はインジ
ェクタ24とコントロールユニット21との連携により
構成され、燃料噴射巾検出手段15、基本噴射パルス出
力手段11、臨時噴射パルス出力手段12のそれぞれの
作用の結果の信号を受け、これらの信号を演算または処
理して得た最終燃料パルス幅の信号を燃料噴射手段14
に送る。燃料噴射手段14はこれらの信号に従って燃料
噴射パルス幅を求め、これをインジェクタ24に送り、
基本噴射、臨時噴射または最終噴射の何れかの燃料噴射
が行われる。
The basic injection pulse output means 11 shown in FIG.
4, the boost pressure sensor 26, the motor cylinder 1, and the control unit 21 cooperate with each other. Further, the temporary injection pulse output means in FIG. 1 includes the injector 24, the boost pressure sensor 26, the motor cylinder 1
The control unit 21 is configured by cooperating with the control unit 21. Further, the fuel injection width detection means shown in FIG. 1 is constituted by the injector 24, the motor cylinder 1, and the control unit 21 in cooperation with each other. The fuel injection means in FIG. 1 include an injector 24 and a motor cylinder 1.
and the control unit 21. The final injection pulse output means 13 shown in FIG. After receiving the resultant signals, the final fuel pulse width signal obtained by calculating or processing these signals is sent to the fuel injection means 14.
send to The fuel injection means 14 determines the fuel injection pulse width according to these signals and sends it to the injector 24.
Fuel injection is performed as basic injection, temporary injection, or final injection.

次に、本実施例の作用を図面を参照して説明する。Next, the operation of this embodiment will be explained with reference to the drawings.

コントロールユニット21に含まれているメモリ212
には、処理プログラム、基本噴射量マツプ、臨時噴射量
演算式、インジェクタ24の無効噴射パルス幅、最終噴
射量演算式などが格納されている。またCPU211は
電磁ピックアップ25の出力信号とブースト圧センサ2
6の信号を基に、メモリ212から読み出された基本噴
射量マツプから基本噴射パルス幅を算出する。
Memory 212 included in control unit 21
Stored therein are a processing program, a basic injection amount map, a temporary injection amount calculation formula, an invalid injection pulse width of the injector 24, a final injection amount calculation formula, and the like. The CPU 211 also outputs the output signal of the electromagnetic pickup 25 and the boost pressure sensor 2.
Based on the signal No. 6, the basic injection pulse width is calculated from the basic injection amount map read out from the memory 212.

さらに、CPU211はブースト圧センサ26の信号か
ら機関の加速状態が検出されると、メモリ212から読
み出された臨時噴射量の演算式にもとづいて臨時噴射パ
ルス幅を算出する。これらの算出された基本噴射パルス
幅と臨時噴射パルス幅はインタフェース213を介して
インジェクタ24へ出力されるが、基本噴射パルスと臨
時噴射パルスが重なった場合、総パルス幅=基本噴射パ
ルス幅+臨時噴射パルス幅−無効噴射パルス幅、となる
ように噴射パルス幅を演算して出力する。
Further, when the acceleration state of the engine is detected from the signal of the boost pressure sensor 26, the CPU 211 calculates the temporary injection pulse width based on the temporary injection amount calculation formula read from the memory 212. These calculated basic injection pulse width and temporary injection pulse width are output to the injector 24 via the interface 213, but if the basic injection pulse and the temporary injection pulse overlap, the total pulse width = basic injection pulse width + temporary injection pulse width. The injection pulse width is calculated and output as follows: injection pulse width - invalid injection pulse width.

従って基本噴射パルス幅と臨時噴射パルス幅のそれぞれ
が有している無効噴射パルス幅が2つ含まれて無効噴射
filが倍増されるようなことはない。
Therefore, the invalid injection fil will not be doubled due to two invalid injection pulse widths included in each of the basic injection pulse width and the temporary injection pulse width.

し発明の効果] 以1−説明したように本発明の内燃機関の燃料噴射装置
においては、最終噴射パルス出力手段が、基本噴射パル
ス出力手段および臨時噴射パルス出力手段のそれぞれか
ら送られる燃料噴射パルス幅の信号を受け、また、これ
らの燃料が噴射中であるか否かを示す信号を燃料噴射巾
検出手段がら受ける。そして最終噴射パルス出力手段は
これら3つの信号の一部または全部を演算または処理し
、無効噴射パルス幅が重複しないように削減して最終噴
射パルス幅の信号を生成し、燃料噴射手段に送り、燃料
噴射手段はこの信号に従ってインジェクタを制御して最
終噴射燃料を噴射させることにより、内燃機関の燃費を
少なくすると共に応答性を向上させる効果がある。
[Effects of the Invention] 1- As explained above, in the fuel injection device for an internal combustion engine of the present invention, the final injection pulse output means outputs the fuel injection pulses sent from each of the basic injection pulse output means and the temporary injection pulse output means. The fuel injection width detection means also receives a signal indicating whether or not these fuels are being injected. Then, the final injection pulse output means calculates or processes some or all of these three signals, reduces the invalid injection pulse width so that they do not overlap, generates a final injection pulse width signal, and sends it to the fuel injection means, The fuel injection means controls the injector in accordance with this signal to inject the final injection fuel, thereby reducing the fuel consumption of the internal combustion engine and improving responsiveness.

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

第1図は本発明の内燃機関の燃料噴射装置の一実施例の
ブロック図、第2図は本実施例の主要部の構成図である
。 1・・・モータシリンダ、2・・・ピストン、2A・・
・ピストンリング、3・・・回転円板、4・・・点火栓
、5・・・吸気管、6・・・吸気弁、7・・・排気管、
8・・・排気弁、 9・・・コネクティングロッド、 11・・・基本噴射パルス出力手段、 12・・・臨時噴射パルス出力手段、 13・・・最終噴射パルス出力手段、 14・・・燃料噴射手段、 15・・・燃料噴射巾検出手段、 21・・・コントロールユニット、 24・・・インジェクタ、25・・・電磁ピックアップ
、26・・・ブースト圧センサ、30・・・回転数信号
、31・・・ブースト圧信号、 32・・・噴射パルス幅信号、211・・・cpu。 212・・・メモリ、213・・・インタフェース。
FIG. 1 is a block diagram of an embodiment of a fuel injection device for an internal combustion engine according to the present invention, and FIG. 2 is a block diagram of the main parts of this embodiment. 1...Motor cylinder, 2...Piston, 2A...
・Piston ring, 3... Rotating disc, 4... Spark plug, 5... Intake pipe, 6... Intake valve, 7... Exhaust pipe,
8...Exhaust valve, 9...Connecting rod, 11...Basic injection pulse output means, 12...Temporary injection pulse output means, 13...Final injection pulse output means, 14...Fuel injection Means, 15... Fuel injection width detection means, 21... Control unit, 24... Injector, 25... Electromagnetic pickup, 26... Boost pressure sensor, 30... Rotation speed signal, 31... ...boost pressure signal, 32...injection pulse width signal, 211...cpu. 212...Memory, 213...Interface.

Claims (1)

【特許請求の範囲】 1、内燃機関の運転状態に応じて基本燃料量を出力する
基本噴射パルス出力手段と、 前記内燃機関の加速状態に応じて、その回転数とは無関
係に非同期的に燃料量を出力する臨時噴射パルス出力手
段と、 現在燃料を噴射中であるか否かを検出する燃料噴射中検
出手段と、 前記基本噴射パルス出力手段の出力信号、前記臨時噴射
パルス出力手段の出力信号および前記燃料噴射中検出手
段の出力信号により現在基本噴射パルスが出力中でない
場合は臨時噴射パルスをそのまま最終噴射パルスとし、
現在基本噴射パルスが出力中である場合は、基本噴射パ
ルス幅と臨時噴射パルス幅との和から1つの無効噴射パ
ルス幅を除く演算を行ってこれを最終噴射パルス幅とし
て出力する最終噴射パルス出力手段と、 前記最終噴射パルス出力手段の出力信号に応じて燃料を
噴射する燃料噴射手段とを備える内燃機関の燃料噴射装
置。
[Scope of Claims] 1. Basic injection pulse output means for outputting a basic fuel amount according to the operating state of the internal combustion engine; temporary injection pulse output means for outputting the amount; fuel injection detecting means for detecting whether fuel is currently being injected; an output signal of the basic injection pulse output means; an output signal of the temporary injection pulse output means. and if the basic injection pulse is not currently being output according to the output signal of the fuel injection detecting means, the temporary injection pulse is directly used as the final injection pulse;
If the basic injection pulse is currently being output, a final injection pulse output is performed that removes one invalid injection pulse width from the sum of the basic injection pulse width and the temporary injection pulse width, and outputs this as the final injection pulse width. A fuel injection device for an internal combustion engine, comprising: means for injecting fuel according to an output signal of the final injection pulse output means.
JP10621189A 1989-04-25 1989-04-25 Fuel injection device for internal combustion engine Pending JPH02283839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10621189A JPH02283839A (en) 1989-04-25 1989-04-25 Fuel injection device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10621189A JPH02283839A (en) 1989-04-25 1989-04-25 Fuel injection device for internal combustion engine

Publications (1)

Publication Number Publication Date
JPH02283839A true JPH02283839A (en) 1990-11-21

Family

ID=14427820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10621189A Pending JPH02283839A (en) 1989-04-25 1989-04-25 Fuel injection device for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH02283839A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003060308A1 (en) * 2002-01-15 2003-07-24 Mikuni Corporation Fuel injection control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003060308A1 (en) * 2002-01-15 2003-07-24 Mikuni Corporation Fuel injection control device
CN100392228C (en) * 2002-01-15 2008-06-04 株式会社三国 Fuel injection control device

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