JPS60256558A - Fuel injector - Google Patents
Fuel injectorInfo
- Publication number
- JPS60256558A JPS60256558A JP59110846A JP11084684A JPS60256558A JP S60256558 A JPS60256558 A JP S60256558A JP 59110846 A JP59110846 A JP 59110846A JP 11084684 A JP11084684 A JP 11084684A JP S60256558 A JPS60256558 A JP S60256558A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- fuel
- air
- detouring path
- upstream
- 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
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
- 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)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は絞り弁の上流に燃料噴射弁を取り付けた燃料噴
射装置に係り、特にエンジンの運転条件に応じて吸入空
気量を自動的に補正する装置による空燃比を適正に制御
するものに関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a fuel injection device in which a fuel injection valve is installed upstream of a throttle valve, and particularly to a fuel injection device that automatically corrects the amount of intake air according to engine operating conditions. This invention relates to a device that appropriately controls the air-fuel ratio.
絞り弁の上流に燃料噴射弁を取り付けて、絞シ弁の外周
を通過する吸入空気により燃料の微粒化を促進するとこ
ろの単点燃料噴射装置（８Ｐｉ）においては、種々のエ
ンジンの運転条件における吸入空気量を補正する方法と
して絞り弁の上流と下流を連通ずる迂回路を一般けて、
この迂回路内に開閉弁を取り付けて開閉度合を変えるこ
とで制御する方法が知られている。In the single-point fuel injection system (8Pi), in which a fuel injection valve is installed upstream of the throttle valve and the intake air passing around the outer periphery of the throttle valve promotes atomization of the fuel, it is possible to As a method of correcting the amount of intake air, a detour is generally created that connects the upstream and downstream of the throttle valve.
A known method is to install an on-off valve in this detour and control the detour by changing the degree of opening and closing.
一例としては、特開昭５５−１５６２３９号に開示され
ている場合のように迂回路の中間部にエンジンの始動・
暖機状態に応じて開度を制御する空気制御弁を取り付け
たものがおる。この場合に絞り弁を全開として運転した
場合には、燃料噴射弁から噴射した燃料の一部が吹き返
えしにより逆流して迂回路の入口より流入し空気制御弁
の近くに留まることがある。このような状態で始動した
場合には、燃料噴射弁から供給する所定の燃料の他に留
まった燃料が追加された状態で吸入されるために、濃い
混合気が供給されて始動性や排気性能が劣化する。For example, as in the case disclosed in Japanese Patent Application Laid-Open No. 55-156239, the engine is started and
Some are equipped with an air control valve that controls the opening depending on the warm-up state. In this case, if the throttle valve is operated with the throttle valve fully open, some of the fuel injected from the fuel injection valve may flow backwards due to blowback, flow into the detour entrance, and remain near the air control valve. . When starting under such conditions, in addition to the prescribed fuel supplied from the fuel injector, the remaining fuel is also inhaled, providing a rich air-fuel mixture, which improves startability and exhaust performance. deteriorates.
第２図は、上記の基本構成を示した実施例である。スロ
ットルボディ１には、絞り弁２が絞り軸３に固定して取
り付けている。絞シ弁２の上流には、インジェクタ４が
設置されてエンジンの運転状態に応じて燃料の噴射量を
制御している。エンジンの始動・暖機時は、絞り弁軸３
に連結した感温部材（バイメタル・ワックスなど）で絞
り弁２の開弁量を制御する方法や迂回路８内に取り付け
た電磁弁７の開弁率を変えて制御する方法がある。FIG. 2 shows an embodiment showing the above basic configuration. A throttle valve 2 is fixedly attached to a throttle shaft 3 to a throttle body 1. An injector 4 is installed upstream of the throttle valve 2 and controls the amount of fuel injected according to the operating state of the engine. When starting or warming up the engine, throttle valve shaft 3
There is a method of controlling the opening amount of the throttle valve 2 using a temperature-sensitive member (such as bimetal wax) connected to the valve, and a method of controlling the opening amount of the solenoid valve 7 installed in the detour path 8 by changing the opening rate.
この迂回路をバイパスする空気は、前述の運転条件の他
に、エアコン作動時や夜間の照明使用中における電気負
荷増加に伴なうエンジン回転上昇の制御にも使用する。In addition to the above-mentioned operating conditions, the air bypassing this detour is also used to control the increase in engine speed due to an increase in electrical load when the air conditioner is operating or when lights are being used at night.
また減速運転時のエンジンへの吸入空気量の補正にも使
用できる。It can also be used to correct the amount of air intake into the engine during deceleration operation.
このような構成では、バイパス空気人口５をインジェク
タ４の噴口４１よりも上流に開口してもエンジンのオー
バーラツプによる吹き返えしによ“（） り燃料の粒子
が逆流しバイパス空気人口５より流入し電磁弁７の弁７
１の外周や迂回路８内に滞留する。In such a configuration, even if the bypass air port 5 is opened upstream of the nozzle 41 of the injector 4, fuel particles will flow backwards and flow in from the bypass air port 5 due to blowback due to engine overlap. Valve 7 of solenoid valve 7
1 and within the detour 8.
したがってエンジンの運転条件顛よシミ磁弁７を開弁し
た場合には、迂回路８を介して供給される空気と共に滞
留した燃料が一時的にエンジンに供給されるため、空燃
比が過濃化してエンジンの運転状態と排気性能を大幅に
低下する。Therefore, if the stain solenoid valve 7 is opened depending on the operating conditions of the engine, the fuel accumulated together with the air supplied via the bypass path 8 will be temporarily supplied to the engine, causing the air-fuel ratio to become over-enriched. This will significantly reduce the engine operating condition and exhaust performance.
本発明の目的は、前述のような状態で迂回ｊｌｌＢ内に
燃料が滞留することを防止するものである。An object of the present invention is to prevent fuel from remaining in the detour jllB in the above-mentioned condition.
〔発明の４概要〕
本発明では、電磁弁７の取り付は位置をバイパス空気人
口５の近くとして実質的な燃料の滞留を皆無とするもの
で、第１図の実施例により詳細に説明する。[4 Overview of the Invention] In the present invention, the solenoid valve 7 is mounted near the bypass air intake 5 so that there is virtually no fuel retention, and this will be explained in detail with reference to the embodiment shown in FIG. .
インジェクタ４の噴口４１の上方に開口した迂回路８の
バイパス空気人口５には、電磁弁７を取り付ける。迂回
路８の下流に開口したパイ、バス空するネジ６を設置す
る。またバイパス空気人口５の近くには、約１咽程度の
オリ、フイス１０を開口して迂回路８内には、常に吸入
空気を流通させている。A solenoid valve 7 is attached to the bypass air port 5 of the bypass path 8 that opens above the nozzle 41 of the injector 4. A pie opening and a screw 6 for emptying the bus are installed downstream of the detour 8. Further, a cage 10 of approximately one throat size is opened near the bypass air population 5 to allow intake air to constantly flow through the bypass path 8.
このような本発明による構成によれば、迂回路８内には
燃料が滞留することがなく、電磁弁７へ開弁命令を出し
弁７１を開弁しても所属の望気量の増加を実現し空燃比
の値も適正化される。According to the configuration according to the present invention, fuel does not remain in the detour 8, and even if a valve opening command is issued to the solenoid valve 7 and the valve 71 is opened, the desired air amount of the valve 71 does not increase. This makes it possible to optimize the air-fuel ratio.
またオリフィス１０は、エンジンの容斌やシステムの方
針により決定されるもので絶対に必要々ものではない。Further, the orifice 10 is determined by the capacity of the engine and the policy of the system, and is not absolutely necessary.
・ また電磁弁７を上方に配設することで、絞り弁軸３
よりも下方の長さを短縮できるためスロットルボディ１
の低背化も可能となる。またＭ磁弁７への吸気マニホー
ルドからの伝熱も防止できるため電磁弁の耐久性・信頼
性を向上できる。- Also, by arranging the solenoid valve 7 upward, the throttle valve shaft 3
Throttle body 1 because the lower length can be shortened compared to
It is also possible to reduce the height of the Furthermore, since heat transfer from the intake manifold to the M magnetic valve 7 can be prevented, the durability and reliability of the solenoid valve can be improved.
迂回路８の空気を制御する′電磁弁７は、吸気圧力の伝
達で開閉するサーボ弁としてもよい。The electromagnetic valve 7 that controls the air in the detour 8 may be a servo valve that opens and closes by transmitting intake pressure.
第１図は、本発明の燃料噴射装置の縦断面図、第２図は
、従来による燃料噴射装置の縦断面図である。
１・・・スロットルボディ、２・・・絞り弁、４・・・
インジェクタ、５・・・バイパス空気入口、７・・・電
磁弁、８第１図FIG. 1 is a longitudinal sectional view of a fuel injection device according to the present invention, and FIG. 2 is a longitudinal sectional view of a conventional fuel injection device. 1... Throttle body, 2... Throttle valve, 4...
Injector, 5... Bypass air inlet, 7... Solenoid valve, 8 Fig. 1
Claims (1)
射する燃料噴射装置において、絞り弁の上流と下流を連
通ずる迂回路を４Ｌシ付けて迂回路の入口部に開閉弁を
配置した燃料噴射装置。 ２ 第１項のものにおいて、迂回路内に取り付けた開閉
弁の上流と下流に連通ずる固定オリフィスを設けた燃料
噴射装置。 ３、第１項のものにおいて、迂回路内に最大バイパス空
気量を調整する部材を設けた燃料噴射装置。[Claims] 1. In a fuel injection device that injects pressurized fuel by disposing a fuel injection valve upstream of a throttle valve, a 4L detour is provided to communicate the upstream and downstream of the throttle valve. A fuel injection device with an on-off valve located at the inlet. 2. A fuel injection device according to item 1, which is provided with a fixed orifice that communicates with the upstream and downstream sides of the on-off valve installed in the detour. 3. The fuel injection device according to item 1, which is provided with a member for adjusting the maximum amount of bypass air in the detour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59110846A JP2568992B2 (en) | 1984-06-01 | 1984-06-01 | Fuel injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59110846A JP2568992B2 (en) | 1984-06-01 | 1984-06-01 | Fuel injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60256558A true JPS60256558A (en) | 1985-12-18 |
| JP2568992B2 JP2568992B2 (en) | 1997-01-08 |
Family
ID=14546143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59110846A Expired - Lifetime JP2568992B2 (en) | 1984-06-01 | 1984-06-01 | Fuel injection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2568992B2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514907A (en) * | 1978-07-14 | 1980-02-01 | Hitachi Ltd | Air control valve for fuel injection engine |
| JPS55156239A (en) * | 1979-05-24 | 1980-12-05 | Nippon Denso Co Ltd | Air intake device of engine |
| JPS5647633A (en) * | 1979-09-27 | 1981-04-30 | Mitsubishi Motors Corp | Carbureter for internal combustion engine |
| JPS58111349U (en) * | 1982-01-26 | 1983-07-29 | 三菱電機株式会社 | Bypass air introduction device |
| JPS58172032U (en) * | 1982-05-11 | 1983-11-17 | 愛三工業株式会社 | Bypass air volume adjustment device for internal combustion engines |
-
1984
- 1984-06-01 JP JP59110846A patent/JP2568992B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514907A (en) * | 1978-07-14 | 1980-02-01 | Hitachi Ltd | Air control valve for fuel injection engine |
| JPS55156239A (en) * | 1979-05-24 | 1980-12-05 | Nippon Denso Co Ltd | Air intake device of engine |
| JPS5647633A (en) * | 1979-09-27 | 1981-04-30 | Mitsubishi Motors Corp | Carbureter for internal combustion engine |
| JPS58111349U (en) * | 1982-01-26 | 1983-07-29 | 三菱電機株式会社 | Bypass air introduction device |
| JPS58172032U (en) * | 1982-05-11 | 1983-11-17 | 愛三工業株式会社 | Bypass air volume adjustment device for internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2568992B2 (en) | 1997-01-08 |
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