JP3082407B2 - Engine intake system - Google Patents
Engine intake systemInfo
- Publication number
- JP3082407B2 JP3082407B2 JP04084955A JP8495592A JP3082407B2 JP 3082407 B2 JP3082407 B2 JP 3082407B2 JP 04084955 A JP04084955 A JP 04084955A JP 8495592 A JP8495592 A JP 8495592A JP 3082407 B2 JP3082407 B2 JP 3082407B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- swirl
- intake
- intake air
- air amount
- 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.)
- Expired - Fee Related
Links
Landscapes
- 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)
Description
【０００１】[0001]
【産業上の利用分野】本発明はエンジンの吸気装置に関
し、特にスワール弁を設けた吸気装置の出力変動防止に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for an engine, and more particularly to a method for preventing output fluctuation of an intake system provided with a swirl valve.
【０００２】[0002]
【従来の技術】エンジン負荷状態等に応じてエンジン吸
気をシリンダ燃焼室内に渦流として供給し、いわゆるリ
ーンバーン運転を行ってＮＯｘの低減を図る吸気装置が
あり、渦流を供給するスワール流路をエンジン吸気ポー
トに近い位置で吸気路より分岐せしめて、スワール弁に
よりスワール流路を適宜開閉するようにしている。2. Description of the Related Art There is an intake device that supplies engine intake air as a vortex into a cylinder combustion chamber in accordance with an engine load state and performs so-called lean burn operation to reduce NOx. The swirl valve branches off from the intake passage at a position close to the intake port, and the swirl valve appropriately opens and closes the swirl passage.
【０００３】かかる吸気装置において、スワール弁の開
閉時にシリンダの吸入空気量が急変して、エンジンのト
ルクショックを生じることがあり、これを防止するため
に例えば特開昭５８−２８５１８号公報、特開昭６２−
６７２２８号公報では、スワール弁の開閉時の作動速度
を緩やかにして吸入空気の急変を防止するものが提案さ
れている。[0003] In such an intake device, when the swirl valve is opened and closed, the intake air amount of the cylinder may suddenly change, causing a torque shock of the engine. To prevent this, for example, Japanese Patent Application Laid-Open No. 58-28518 discloses a method. Kaisho 62-
Japanese Patent Publication No. 67228 proposes a device in which the operating speed at the time of opening and closing the swirl valve is reduced to prevent a sudden change in intake air.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記公
報記載の装置では、スワール弁を緩速作動せしめるため
の制御が必要であるとともに、開閉途中で渦流の生成が
不安定となって却ってトルクショックを生じ易い懸念が
ある。However, in the apparatus described in the above publication, control is required to operate the swirl valve slowly, and the generation of eddy current becomes unstable during opening and closing, thus causing torque shock. There are concerns that are likely to occur.
【０００５】本発明はかかる課題を解決するもので、ス
ワール弁開閉時のトルクショックの発生を確実に防止し
て、好適なリーンバーン運転を可能とするエンジンの吸
気装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an intake system for an engine which reliably prevents the occurrence of torque shock when a swirl valve is opened and closed and enables a suitable lean burn operation. I do.
【０００６】[0006]
【課題を解決するための手段】本発明の構成を説明する
と、エンジンの吸気装置は、エンジン吸気ポート１１に
近い位置で吸気路１より分岐されエンジンシリンダ３の
燃焼室３１内に渦流を供給するスワール流路２と、該ス
ワール流路２を開閉するスワール弁４と、該スワール弁
４上流で吸気量を調整可能な吸気量調整手段６，７と、
エンジン負荷に応じて上記スワール弁４を開閉駆動する
とともにスワール弁４開閉時の吸気量変動を抑制するよ
うに前記吸気量調整手段６，７を制御する制御手段８と
を具備し、前記制御手段８は、前記スワール弁４の開閉
駆動に先立って前記吸気量調整手段６，７を制御する構
成とする。To explain the structure of the present invention, an intake system for an engine supplies a vortex to a combustion chamber 31 of an engine cylinder 3 which is branched from an intake passage 1 at a position close to an engine intake port 11. A swirl channel 2, a swirl valve 4 for opening and closing the swirl channel 2, and the swirl valve
4 intake air amount adjusting means 6, 7 capable of adjusting the intake air amount upstream;
And control means 8 for controlling the intake air amount adjusting means 6, 7 so as to suppress the intake air amount variation of swirl valve 4 opens and closes <br/> together with for opening and closing the swirl valve 4 according to the engine load The control means 8 is provided for opening and closing the swirl valve 4
A structure for controlling the intake air amount adjusting means 6, 7 prior to driving.
And
【０００７】[0007]
【作用】上記構成において、スワール弁４開閉の際に
は、スワール弁４の急速開閉に伴なう吸気量変動を抑制
すべく、吸気量調整手段６，７が制御されてスワール弁
４上流で吸気量が増減される。ここで、スワール弁４上
流で吸気量が増減された後にスワール弁４の開閉駆動が
なされるようにしたので、スワール弁４の開閉のタイミ
ングに対する、吸気路１のスワール流路２分岐位置にお
ける吸気量の増減のタイミングの遅れが抑制されて燃焼
室３１内への吸気量変動を好適に抑制することができ、
エンジンのトルクショックの発生は効果的に防止され
る。スワール弁４上流の吸気量の増減は、スワール弁４
の急速開閉に伴う吸気量変動を抑制するように、前記吸
気路１に設けたスロットル弁５を迂回して吸気をバイパ
スするバイパス流路６を開閉しバイパス流路６とともに
前記吸気量調整手段を構成するバイパス弁７を開閉制御
するようにするとよい。In the above configuration, when the swirl valve 4 is opened and closed,
It is suppressed accompanying the intake air amount variation rapidly opening and closing of the swirl control valve 4
In order to control the intake air amount adjusting means 6 and 7,
4 The intake air amount is increased or decreased upstream. Here, on the swirl valve 4
Opening and closing drive of the swirl valve 4
The opening and closing of the swirl valve 4
To the swirl flow path 2 branch position of the intake path 1
Delay in the timing of increase and decrease of intake air volume
Fluctuation of the amount of intake air into the chamber 31 can be suitably suppressed,
The occurrence of engine torque shock is effectively prevented. The increase or decrease of the intake air amount upstream of the swirl valve 4
So as to suppress the intake air amount variation caused by rapid opening and closing of the intake
Bypasses the throttle valve 5 provided in the air passage 1 to bypass the intake air
With the bypass passage 6 to open and close the bypass passage 6 to scan
It is preferable to control opening and closing of the bypass valve 7 constituting the intake air amount adjusting means .
【０００８】上記バイパス弁７は、アイドル回転数制御
装置（ＩＳＣ）のバイパス弁と共用することができる。The bypass valve 7 can be shared with a bypass valve of an idle speed control device (ISC).
【０００９】[0009]
【実施例】図１において、エンジンシリンダ３内のピス
トン上方には燃焼室３１が形成され、該燃焼室３１へは
吸気ポート１１を経て吸気路１より吸気が供給される。
吸気路１の上流位置にはスロットル弁５が配設され、こ
のスロットル弁５を迂回して上下流位置をバイパス流路
６が結び、これを開閉するＩＳＣを兼用しバイパス流路
６とともに吸気量調整手段を構成するバイパス弁７が設
けてある。In FIG. 1, a combustion chamber 31 is formed above a piston in an engine cylinder 3, and intake air is supplied to the combustion chamber 31 from an intake passage 1 through an intake port 11.
The upstream position of the intake passage 1 throttle valve 5 are arranged, the throttle valve 5 bypasses the upstream and downstream positions knot bypass passage 6, bypass passage also serves as a ISC for opening and closing the
6, a bypass valve 7 which constitutes an intake air amount adjusting means is provided.
【００１０】吸気ポート１１に近い吸気路１の下流位置
では、公知構造のスワール流路２が分岐して上記燃焼室
３１へ至っている。このスワール流路２の分岐口はダイ
ヤフラム装置４１で駆動されるスワール弁４により開閉
され、上記ダイヤフラム装置４１には電磁制御弁４２お
よび逆止弁４３を経て吸気路１の負圧が供給されてい
る。At a position downstream of the intake passage 1 near the intake port 11, a swirl flow path 2 having a known structure branches off to reach the combustion chamber 31. The branch of the swirl flow path 2 is opened and closed by a swirl valve 4 driven by a diaphragm device 41. The negative pressure of the intake passage 1 is supplied to the diaphragm device 41 via an electromagnetic control valve 42 and a check valve 43. I have.
【００１１】制御手段を兼ねる制御装置８には、スロッ
トル弁５の開度を検出する開度センサ５１の出力信号、
吸気路負圧を検出する圧力センサ９２の出力信号、ディ
ストリビュータ９４のエンジン回転数信号等が入力し、
これらの入力信号等に基づいて、後述の如く上記スワー
ル弁４、バイパス弁７を開閉駆動するとともに、点火コ
イル９３およびディストリビュータ９４を介して点火プ
ラグ９５を点火作動せしめ、また、燃料噴射弁９１を作
動せしめる。A control device 8 also serving as a control means includes an output signal of an opening sensor 51 for detecting an opening of the throttle valve 5,
An output signal of the pressure sensor 92 for detecting the intake passage negative pressure, an engine speed signal of the distributor 94, and the like are input.
Based on these input signals and the like, the swirl valve 4 and the bypass valve 7 are opened and closed as described later, the ignition plug 95 is ignited via the ignition coil 93 and the distributor 94, and the fuel injection valve 91 is operated. Let it work.
【００１２】スワール弁４およびバイパス弁７の制御を
図２で説明する。図はスワール弁４を閉鎖する場合の手
順を示し、ステップ１０１では、冷却水温、機関負荷、
機関回転数等よりスワール弁４の閉弁条件が成立したこ
とを確認する。スワール弁４を閉じた時の吸気量の低減
を予想してこれを補正するバイパス弁７の開放補正量を
セットし、バイパス弁７をこの補正量にしたがって開放
する（ステップ１０２）。The control of the swirl valve 4 and the bypass valve 7 will be described with reference to FIG. The figure shows a procedure for closing the swirl valve 4. In step 101, the cooling water temperature, the engine load,
It is confirmed from the engine speed and the like that the closing condition of the swirl valve 4 is satisfied. An opening correction amount of the bypass valve 7 for predicting a reduction in the intake air amount when the swirl valve 4 is closed and correcting the intake air amount is set, and the bypass valve 7 is opened according to the correction amount (step 102).
【００１３】バイパス弁７を開放しても、吸気量の増加
がスワール流路２の分岐口付近に達するには一定時間ｔ
1 かかるから、ステップ１０３では補正時間ｔ1 の経過
を確認し、この時間経過後にスワール弁４を閉鎖する
（ステップ１０４）。その後、バイパス弁７の補正量を
漸次低減し（ステップ１０５）、バイパス弁７を時間を
有して閉鎖せしめる。Even if the bypass valve 7 is opened, it takes a certain time t for the increase in the intake air amount to reach the vicinity of the branch of the swirl flow path 2.
Therefore, in step 103, the elapse of the correction time t1 is confirmed, and after the elapse of this time, the swirl valve 4 is closed (step 104). Thereafter, the correction amount of the bypass valve 7 is gradually reduced (step 105), and the bypass valve 7 is closed with time.
【００１４】この効果を図３で説明すると、スワール弁
４閉鎖に先立ってバイパス弁７が所定の補正量だけ開放
されるから、スワール弁４閉鎖時の吸気量の急減（図の
破線）は抑制され、これにより、エンジンのトルクショ
ックの発生が防止される。This effect will be described with reference to FIG. 3. Since the bypass valve 7 is opened by a predetermined correction amount before the swirl valve 4 is closed, a sharp decrease in the intake air amount when the swirl valve 4 is closed (broken line in the figure) is suppressed. Thus, the occurrence of torque shock of the engine is prevented.
【００１５】同様のことはスワール弁４の開放時にもな
され、スワール弁開放に先立ってバイパス弁７が所定の
補正量だけ閉鎖されるから、この場合にも吸気量の急増
（図の破線）が抑制され、エンジンのトルクショックの
発生が防止される。The same is done when the swirl valve 4 is opened, and the bypass valve 7 is closed by a predetermined correction amount before the swirl valve is opened. This suppresses the occurrence of engine torque shock.
【００１６】[0016]
【発明の効果】以上の如く、本発明のエンジンの吸気装
置は、スワール弁の開閉作動に伴う吸気量の変動を、ス
ワール弁の開閉駆動に先立ってスワール弁上流で吸気量
を補正することによって抑制したことにより、エンジン
のトルクショックの発生を効果的に防止することができ
る。特に、バイパス弁の吸気量を補正する場合には、こ
のバイパス弁をＩＳＣと兼用すれば、特別な部品を付加
することなく簡易に実現することができる。As described above, the intake system for an engine according to the present invention suppresses the fluctuation of the intake air amount due to the opening / closing operation of the swirl valve .
Since the intake air amount is corrected by correcting the intake air amount upstream of the swirl valve prior to the opening / closing drive of the swirl valve, the occurrence of torque shock of the engine can be effectively prevented. In particular, when correcting the intake air amount of the bypass valve, if this bypass valve is also used as the ISC, it can be easily realized without adding any special parts.
【図１】装置の全体構成図である。FIG. 1 is an overall configuration diagram of an apparatus.
【図２】制御装置のフローチャートである。FIG. 2 is a flowchart of a control device.
【図３】弁作動等を示すタイムチャートである。FIG. 3 is a time chart showing valve operation and the like.
１ 吸気路 １１ エンジン吸気ポート ２ スワール流路 ３ エンジンシリンダ ３１ 燃焼室 ４ スワール弁 ５ スロットル弁 ６ バイパス流路（吸気量調整手段） ７ バイパス弁（吸気量調整手段） ８ 制御装置（制御手段）DESCRIPTION OF SYMBOLS 1 Intake path 11 Engine intake port 2 Swirl flow path 3 Engine cylinder 31 Combustion chamber 4 Swirl valve 5 Throttle valve 6 Bypass flow path (intake air amount adjusting means) 7 Bypass valve (intake air amount adjusting means) 8 Control device (control means)
Claims (2)
より分岐されエンジンシリンダの燃焼室内に渦流を供給
するスワール流路と、 該スワール流路を開閉するスワール弁と、該スワール弁上流で吸気量を調整可能な吸気量調整手段
と、 エ ンジン負荷に応じて上記スワール弁を開閉駆動すると
ともにスワール弁開閉時の吸気量変動を抑制するように
前記吸気量調整手段を制御する制御手段とを具備し、 前記制御手段は、前記スワール弁の開閉駆動に先立って
前記吸気量調整手段を制御することを特徴とする エンジ
ンの吸気装置。1. A swirl passage branched from an intake passage at a position near an engine intake port to supply a vortex into a combustion chamber of an engine cylinder, a swirl valve for opening and closing the swirl passage, and an intake air amount upstream of the swirl valve. Adjustable intake air amount adjusting means
If, so as to suppress the intake air amount variation of swirl valve opening and closing as well as opening and closing the swirl valve according to engine load
And control means for controlling the intake air amount adjusting means, the control means, prior to the opening and closing of said swirl valves
An intake device for an engine, wherein the intake amount adjusting means is controlled .
けたスロットル弁を迂回して吸気をバイパスするバイパ
ス流路と、該バイパス流路を開閉するバイパス弁とを具
備し、 前記制御手段は、スワール弁開閉時の吸気量変動を抑制
するように上記バイパス弁を開閉駆動することを特徴と
する請求項１に記載のエンジンの吸気装置。2. The control device according to claim 2, wherein the intake air amount adjusting means includes a bypass flow path that bypasses intake air bypassing a throttle valve provided in the intake path, and a bypass valve that opens and closes the bypass flow path. 2. The intake system for an engine according to claim 1, wherein the bypass valve is driven to open and close so as to suppress a change in intake air amount when the swirl valve is opened and closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04084955A JP3082407B2 (en) | 1992-03-06 | 1992-03-06 | Engine intake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04084955A JP3082407B2 (en) | 1992-03-06 | 1992-03-06 | Engine intake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05248248A JPH05248248A (en) | 1993-09-24 |
| JP3082407B2 true JP3082407B2 (en) | 2000-08-28 |
Family
ID=13845062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04084955A Expired - Fee Related JP3082407B2 (en) | 1992-03-06 | 1992-03-06 | Engine intake system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3082407B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6259103B1 (en) * | 1998-11-12 | 2001-07-10 | The United States Of America As Represented By The Secretary Of The Air Force | Light beam detector |
-
1992
- 1992-03-06 JP JP04084955A patent/JP3082407B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05248248A (en) | 1993-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2006046293A (en) | Intake air control device for internal combustion engine | |
| JP2005054588A (en) | Control device of internal combustion engine | |
| JPS6143543B2 (en) | ||
| JP2617487B2 (en) | Scavenging device for supercharged engine | |
| JP3082407B2 (en) | Engine intake system | |
| JPH029080Y2 (en) | ||
| JPH045444A (en) | Air-fuel ratio control device for supercharged lean combustion gasoline internal combustion engine | |
| JP3117784B2 (en) | Exhaust control method for sequential turbo engine | |
| JP4396253B2 (en) | Intake control device for internal combustion engine | |
| JPH03281932A (en) | Supercharging pressure controller of two-stage supercharging internal combustion engine | |
| JPH0329547Y2 (en) | ||
| JP2987675B2 (en) | Intake control device for internal combustion engine | |
| JPS6221724Y2 (en) | ||
| JPH0428890B2 (en) | ||
| JPH0617661A (en) | Supercharged pressure control device for engine | |
| JPH05133235A (en) | Internal combustion engine with mechanical supercharger | |
| JPH0223804Y2 (en) | ||
| JPH01100317A (en) | Supercharged pressure control device for internal combustion engine | |
| JPH0417755A (en) | Exhaust gas recirculation device of supercharged internal lean-burn engine | |
| JP2724717B2 (en) | Engine fuel control device | |
| JPS62276244A (en) | Control device for engine | |
| JP2021102952A (en) | Control device of internal combustion engine | |
| JPH0331533A (en) | Controller for engine equipped with exhaust turbo type supercharger | |
| JPS6143220A (en) | Control device of engine with exhaust turbosupercharger | |
| JP2005061285A (en) | Intake device of internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090630 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100630 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100630 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110630 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |