JPH0658225A - Fuel injection device of internal combustion engine - Google Patents
Fuel injection device of internal combustion engineInfo
- Publication number
- JPH0658225A JPH0658225A JP4206500A JP20650092A JPH0658225A JP H0658225 A JPH0658225 A JP H0658225A JP 4206500 A JP4206500 A JP 4206500A JP 20650092 A JP20650092 A JP 20650092A JP H0658225 A JPH0658225 A JP H0658225A
- Authority
- JP
- Japan
- Prior art keywords
- fuel injection
- fresh air
- air
- exhaust
- internal combustion
- 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
Links
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、エアアシスト構造を
有する内燃機関の燃料噴射装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection device for an internal combustion engine having an air assist structure.
【０００２】[0002]
【従来の技術】図２は従来のエアアシスト構造をとるガ
ソリン内燃機関の燃料噴射装置である。１は吸気配管２
０に取り付けられ内燃機関への空気量を制御する絞り
弁、２は絞り弁１の上流にあって空気量を検出する空気
量センサ、３は先端部が内燃機関に臨んでおり空気量セ
ンサ２からの情報をもとに最適な燃料量を噴射するエア
アシスト構造をとる燃料噴射弁、４は一端が空気量セン
サ２の下流側に接続され他端が燃料噴射弁３に接続され
た大気導入通路で、吸気配管１５のエアダクト２１とイ
ンテークマニホールド２２との箇所での差圧によって、
大気導入通路４からのアシストエアが燃料噴射弁３から
噴射される噴霧に衝突するようになっている。2. Description of the Related Art FIG. 2 shows a conventional fuel injection device for a gasoline internal combustion engine having an air assist structure. 1 is intake pipe 2
A throttle valve 2 mounted on 0 for controlling the amount of air to the internal combustion engine, 2 is an air amount sensor upstream of the throttle valve 1 for detecting the amount of air, and 3 is an air amount sensor 2 whose front end faces the internal combustion engine. A fuel injection valve 4 having an air assist structure that injects an optimum amount of fuel based on information from 4 is introduced into the atmosphere with one end connected to the downstream side of the air amount sensor 2 and the other end connected to the fuel injection valve 3. In the passage, due to the pressure difference between the air duct 21 of the intake pipe 15 and the intake manifold 22,
Assist air from the atmosphere introduction passage 4 collides with the spray injected from the fuel injection valve 3.
【０００３】次に、動作について説明する。絞り弁１の
開閉によって内燃機関への吸入空気量が制御される。こ
の吸入空気量は空気量センサ２によって検出される。空
気量センサ２によって検出された情報は制御手段である
コンピュータユニット２３に送られ、そこで最適な燃料
量が設定され、その信号に基づきエアアシスト構造をと
った燃料噴射弁３から適量な燃料が噴射される。この時
アシストエアは、インテークマニホールド１１内のイン
マニ圧力とエアダクト２１内の圧力との圧力差によっ
て、大気導入過路４を通って燃料噴射弁３に送られ、燃
料噴射弁３から噴射される燃料噴霧に衝突することによ
って、噴霧燃料の微粒化が促進される。Next, the operation will be described. The amount of intake air to the internal combustion engine is controlled by opening / closing the throttle valve 1. This intake air amount is detected by the air amount sensor 2. The information detected by the air amount sensor 2 is sent to a computer unit 23 which is a control means, an optimum fuel amount is set there, and an appropriate amount of fuel is injected from the fuel injection valve 3 having an air assist structure based on the signal. To be done. At this time, the assist air is sent to the fuel injection valve 3 through the atmosphere introduction passage 4 due to the pressure difference between the intake manifold pressure in the intake manifold 11 and the pressure in the air duct 21, and the fuel spray injected from the fuel injection valve 3 is injected. By colliding with, the atomization of atomized fuel is promoted.
【０００４】[0004]
【発明が解決しようとする課題】従来のガソリン内燃機
関の燃料噴射装置は以上のように構成されているので、
燃料噴射弁１の構造によって決まる霧化促進のためのエ
ア量を多くすると暖機時のアイドルが維持できないおそ
れがあり、逆に少なくすると燃料の微粒化が劣るといっ
た課題があった。Since the conventional fuel injection device for a gasoline internal combustion engine is constructed as described above,
If the amount of air for promoting atomization, which is determined by the structure of the fuel injection valve 1, is increased, it may not be possible to maintain idle during warm-up, and conversely, if it is decreased, there is a problem that atomization of fuel is poor.
【０００５】この発明は、上記のような課題を解消する
ためになされたもので、アシストエア量を確保し燃料の
微粒化を図るとともに暖機後のハイアイドルを防止し、
排ガス中のＮＯＸを低減することができる内燃機関の燃
料噴射装置を得ることを目的とする。The present invention has been made in order to solve the above-mentioned problems, and secures an amount of assist air to atomize the fuel and prevent high idle after warming up.
An object of the present invention is to obtain a fuel injection device for an internal combustion engine that can reduce NOX in exhaust gas.
【０００６】[0006]
【課題を解決するための手段】この発明に係わる内燃機
関の燃料噴射装置は、吸気配管に取り付けられ内燃機関
に吸入される空気量を制御する絞り弁と、前記吸気配管
に取り付けられ前記空気量を検出する空気量センサと、
先端部が前記内燃機関内に臨んでおりエアアシスト構造
をとり必要燃料を噴射する燃料噴射弁と、一端が前記空
気量センサの下流側に接続され他端が前記燃料噴射弁に
接続され前記燃料噴射弁に新気を導入する新気導入通路
と、この新気導入通路の途中にあって新気量を制御する
新気制御弁と、前記新気導入通路に取り付けられ新気の
逆流を防ぐチェックバルブと、一端が前記内燃機関に接
続された排気配管に吸い込み口を有し前記燃料噴射弁に
排気を導入する排気導入通路と、この排気導入通路の途
中にあって排気量を制御する排気制御弁と、前記排気導
入通路に取り付けられ排気の逆流を防ぐチェックバルブ
と、前記内燃機関の運転状態に応じて前記新気制御弁と
前記排気制御弁との動作量を制御して前記燃料噴射弁へ
の新気と排気との混合比をあらかじめ設定された値にコ
ントロールする制御手段とを備えたものである。A fuel injection device for an internal combustion engine according to the present invention includes a throttle valve mounted on an intake pipe for controlling the amount of air taken into the internal combustion engine, and the air amount mounted on the intake pipe. An air amount sensor for detecting
A fuel injection valve having a tip end facing the inside of the internal combustion engine and having an air assist structure for injecting necessary fuel; one end connected to a downstream side of the air amount sensor and the other end connected to the fuel injection valve; A fresh air introduction passage for introducing fresh air into the injection valve, a fresh air control valve for controlling the fresh air amount in the fresh air introduction passage, and a fresh air backflow which is attached to the fresh air introduction passage A check valve, an exhaust gas introduction passage having one end connected to the internal combustion engine and having an intake port for introducing exhaust gas to the fuel injection valve, and an exhaust gas that is located in the middle of the exhaust gas introduction passage and controls the amount of exhaust gas. A fuel injection by controlling a control valve, a check valve attached to the exhaust gas introduction passage to prevent backflow of exhaust gas, and controlling operation amounts of the fresh air control valve and the exhaust gas control valve according to an operating state of the internal combustion engine. With fresh air and exhaust to the valve In which a control means for controlling the coupling ratio to a preset value.
【０００７】[0007]
【作用】この発明の内燃機関の燃料噴射装置において
は、アシストエアに排気と新気の混合気を使用すること
により、エア量を多くすることができ燃料の微粒化が促
進されるとともに、排気の一部を再燃するためＮＯＸ量
の低減ができる。In the fuel injection system for an internal combustion engine according to the present invention, by using a mixture of exhaust gas and fresh air as the assist air, the amount of air can be increased and the atomization of fuel can be promoted. The NOX amount can be reduced because part of the NOx is reburned.
【０００８】[0008]
実施例１．以下、この発明の一実施例を図について説明
する。図１はこの発明の一実施例を示す構成図で、図２
と同一または相当部分は同一符号を付し、その説明は省
略する。図において、５は空気量センサ２の下流に吸い
込み口を有し絞り弁１をバイパスして燃料噴射弁３に新
気を導入する新気導入通路、６は新気導入通路５の途中
にあって新気量を制御する新気制御弁、７は新気導入通
路５に設けられ新気の逆流を防ぐチェックバルブ、８は
排気配管２３に吸い込み口を有し燃料噴射弁３に排気を
導入する排気導入通路、９は排気導入通路８の途中にあ
って排気量を制御する排気制御弁、１０は排気導入通路
８に取り付けられ排気の逆流を防ぐチェックバルブ、１
１は内燃機関の運転状態に応じて新気制御弁６と排気制
御弁９の動作量を制御して燃料噴射弁３への新気と排気
との混合比をあらかじめ設定された値にコントロールす
る制御手段であるコンピュータユニットである。Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
The same or corresponding parts are designated by the same reference numerals and the description thereof will be omitted. In the figure, 5 is a fresh air introduction passage for introducing fresh air into the fuel injection valve 3 by bypassing the throttle valve 1 with a suction port downstream of the air amount sensor 2, and 6 is in the middle of the fresh air introduction passage 5. A fresh air control valve for controlling the fresh air amount, 7 is a check valve provided in the fresh air introduction passage 5 for preventing the reverse flow of fresh air, and 8 is a suction pipe in the exhaust pipe 23 and introduces exhaust gas into the fuel injection valve 3. The exhaust gas introduction passage, 9 is an exhaust gas control valve for controlling the amount of exhaust gas in the middle of the exhaust gas introduction passage 8, 10 is a check valve attached to the exhaust gas introduction passage 8 for preventing backflow of exhaust gas, 1
Reference numeral 1 controls the operating amounts of the fresh air control valve 6 and the exhaust control valve 9 in accordance with the operating state of the internal combustion engine to control the mixture ratio of fresh air and exhaust gas to the fuel injection valve 3 to a preset value. It is a computer unit that is a control means.
【０００９】次に、動作について説明する。絞り弁１の
開閉によって内燃機関への吸入空気量が制御される。こ
の吸入空気量は空気量センサ２によって検出される。空
気量センサ２によって検出された情報をもとに最適な燃
料量がエアアシスト構造をとった燃料噴射弁３から噴射
される。この時、燃料噴射弁３に入るアシストエアは絞
り弁１をバイパスして配設された新気導入通路５と吸い
込み口を排気配管２３に有した排気導入通路８とを通り
導入される。新気導入通路５には新気制御弁６とチェッ
クバルブ７とが、排気導入通路８には排気制御弁９とチ
ェックバルブ１０とがそれぞれ配設されており、内燃機
関の運転状態によってあらかじめ設定された新気と排気
との混合比になるように新気制御弁６と排気制御弁９と
の動作量をコンピュータユニット１１によってコントロ
ールする。Next, the operation will be described. The amount of intake air to the internal combustion engine is controlled by opening / closing the throttle valve 1. This intake air amount is detected by the air amount sensor 2. An optimum amount of fuel is injected from the fuel injection valve 3 having the air assist structure based on the information detected by the air amount sensor 2. At this time, the assist air entering the fuel injection valve 3 is introduced through the fresh air introduction passage 5 arranged bypassing the throttle valve 1 and the exhaust introduction passage 8 having the suction port in the exhaust pipe 23. A fresh air control valve 6 and a check valve 7 are provided in the fresh air introduction passage 5, and an exhaust control valve 9 and a check valve 10 are provided in the exhaust introduction passage 8, which are set in advance according to the operating state of the internal combustion engine. The operation amounts of the fresh air control valve 6 and the exhaust control valve 9 are controlled by the computer unit 11 so that the mixed ratio of the fresh air and the exhaust gas thus obtained is obtained.
【００１０】[0010]
【発明の効果】以上のように、この発明の内燃機関の燃
料噴射装置によれば、アシストエアに新気と排気との混
合気を使用するため、霧化促進のためのアシストエア量
を多くしても暖機後のハイアイドルを防止することがで
きると共に、これまで高負荷時においてはインマニ圧が
大気圧に近づくためにアシストエアが流れにくかったの
が排気を利用するための高負荷時には排圧が高くなるた
めにアシストエア発生用の差圧が確保できるという効果
がある。As described above, according to the fuel injection device for an internal combustion engine of the present invention, since the air-fuel mixture of fresh air and exhaust gas is used as assist air, the amount of assist air for promoting atomization is increased. Even after that, it is possible to prevent high idle after warming up, and in the past, when the load was high, the assist air was difficult to flow because the intake manifold pressure approached atmospheric pressure. Since the exhaust pressure becomes high, there is an effect that a differential pressure for generating assist air can be secured.
【図１】この発明の一実施例によるガソリン内燃機関の
燃料噴射装置を示す構成図である。FIG. 1 is a configuration diagram showing a fuel injection device for a gasoline internal combustion engine according to an embodiment of the present invention.
【図２】従来のエアアシスト方式の燃料噴射装置を示す
構成図である。FIG. 2 is a configuration diagram showing a conventional air-assist type fuel injection device.
１ 絞り弁 ２ 空気量センサ ３ 燃料噴射弁 ５ 新気導入通路 ６ 新気制御弁 ７ チェックバルブ ８ 排気導入通路 ９ 排気制御弁 １０ チェックバルブ １１ コンピュータユニット（制御手段） ２０ 吸気配管 ２３ 排気配管 1 throttle valve 2 air quantity sensor 3 fuel injection valve 5 fresh air introduction passage 6 fresh air control valve 7 check valve 8 exhaust introduction passage 9 exhaust control valve 10 check valve 11 computer unit (control means) 20 intake pipe 23 exhaust pipe
【手続補正書】[Procedure amendment]
【提出日】平成５年９月１６日[Submission date] September 16, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００４[Correction target item name] 0004
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００４】[0004]
【発明が解決しようとする課題】従来のガソリン内燃機
関の燃料噴射装置は以上のように構成されているので、
燃料噴射弁１の構造によって決まる霧化促進のためのエ
ア量を多くすると、暖機後のアイドルが維持できないお
それがあり、逆に少なくすると燃料の微粒化が劣るとい
った課題があった。Since the conventional fuel injection device for a gasoline internal combustion engine is constructed as described above,
If the amount of air for promoting atomization determined by the structure of the fuel injection valve 1 is increased, the idle after warming up may not be maintained, and conversely, if it is decreased, atomization of the fuel is inferior.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１０】[0010]
【発明の効果】以上のように、この発明の内燃機関の燃
料噴射装置によれば、アシストエアに新気と排気との混
合気を使用するため、霧化促進のためのアシストエア量
を多くしても暖機後のハイアイドルを防止することがで
きると共に、これまで高負荷時においてはインマニ圧が
大気圧に近づくためにアシストエアが流れにくかったの
が排気を利用するため高負荷時には排圧が高くなるため
にアシストエア発生用の差圧が確保できるという効果が
ある。As described above, according to the fuel injection device for an internal combustion engine of the present invention, since the air-fuel mixture of fresh air and exhaust gas is used as assist air, the amount of assist air for promoting atomization is increased. it is possible to prevent the high idle after warm-up also, so far in order high load of the intake manifold pressure is the assist air to approach the atmospheric pressure was difficult to flow is to utilize exhaust during high load Since the exhaust pressure becomes high, there is an effect that a differential pressure for generating assist air can be secured.
Claims (1)
される空気量を制御する絞り弁と、前記吸気配管に取り
付けられ前記空気量を検出する空気量センサと、先端部
が前記内燃機関内に臨んでおりエアアシスト構造をとり
必要燃料を噴射する燃料噴射弁と、一端が前記空気量セ
ンサの下流側に接続され他端が前記燃料噴射弁に接続さ
れ前記燃料噴射弁に新気を導入する新気導入通路と、こ
の新気導入通路の途中にあって新気量を制御する新気制
御弁と、前記新気導入通路に取り付けられ新気の逆流を
防ぐチェックバルブと、一端が前記内燃機関に接続され
た排気配管に吸い込み口を有し前記燃料噴射弁に排気を
導入する排気導入通路と、この排気導入通路の途中にあ
って排気量を制御する排気制御弁と、前記排気導入通路
に取り付けられ排気の逆流を防ぐチェックバルブと、前
記内燃機関の運転状態に応じて前記新気制御弁と前記排
気制御弁との動作量を制御して前記燃料噴射弁への新気
と排気との混合比をあらかじめ設定された値にコントロ
ールする制御手段とを備えた内燃機関の燃料噴射装置。1. A throttle valve attached to an intake pipe for controlling the amount of air sucked into an internal combustion engine; an air amount sensor attached to the intake pipe for detecting the air amount; and a tip portion inside the internal combustion engine. A fuel injection valve that faces the air injection structure and injects necessary fuel, and one end is connected to the downstream side of the air amount sensor and the other end is connected to the fuel injection valve to introduce fresh air into the fuel injection valve. A fresh air introduction passage, a fresh air control valve in the middle of this fresh air introduction passage for controlling the amount of fresh air, a check valve attached to the fresh air introduction passage to prevent a reverse flow of fresh air, and one end of the internal combustion engine An exhaust gas introduction passage having an intake port in an exhaust pipe connected to an engine for introducing exhaust gas to the fuel injection valve, an exhaust control valve for controlling an exhaust amount in the middle of the exhaust gas introduction passage, and the exhaust gas introduction passage. Mounted on the exhaust Of the check valve for preventing the backflow of the internal combustion engine, the operation amount of the fresh air control valve and the exhaust control valve is controlled according to the operating state of the internal combustion engine to control the mixture ratio of the fresh air and the exhaust gas to the fuel injection valve. A fuel injection device for an internal combustion engine, comprising: a control means for controlling a preset value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4206500A JPH0658225A (en) | 1992-08-03 | 1992-08-03 | Fuel injection device of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4206500A JPH0658225A (en) | 1992-08-03 | 1992-08-03 | Fuel injection device of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0658225A true JPH0658225A (en) | 1994-03-01 |
Family
ID=16524402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4206500A Pending JPH0658225A (en) | 1992-08-03 | 1992-08-03 | Fuel injection device of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0658225A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3532169A1 (en) * | 1985-09-10 | 1987-04-16 | Berger Gmbh & Co Gerhard | Filter |
| FR2734869A1 (en) * | 1995-06-02 | 1996-12-06 | Renault | IC-engine additional fuel supply |
-
1992
- 1992-08-03 JP JP4206500A patent/JPH0658225A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3532169A1 (en) * | 1985-09-10 | 1987-04-16 | Berger Gmbh & Co Gerhard | Filter |
| FR2734869A1 (en) * | 1995-06-02 | 1996-12-06 | Renault | IC-engine additional fuel supply |
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