JPH10266861A - Supercharging device for internal combustion engine - Google Patents
Supercharging device for internal combustion engineInfo
- Publication number
- JPH10266861A JPH10266861A JP9071420A JP7142097A JPH10266861A JP H10266861 A JPH10266861 A JP H10266861A JP 9071420 A JP9071420 A JP 9071420A JP 7142097 A JP7142097 A JP 7142097A JP H10266861 A JPH10266861 A JP H10266861A
- Authority
- JP
- Japan
- Prior art keywords
- intake passage
- intake
- passage portion
- cylindrical member
- engine
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
- F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
- F02B27/0226—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the means generating the charging effect
- F02B27/0247—Plenum chambers; Resonance chambers or resonance pipes
- F02B27/0257—Rotatable plenum chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
- F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
- F02B27/0205—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the charging effect
- F02B27/0215—Oscillating pipe charging, i.e. variable intake pipe length charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
- F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
- F02B27/0226—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the means generating the charging effect
- F02B27/0247—Plenum chambers; Resonance chambers or resonance pipes
- F02B27/0263—Plenum chambers; Resonance chambers or resonance pipes the plenum chamber and at least one of the intake ducts having a common wall, and the intake ducts wrap partially around the plenum chamber, i.e. snail-type
-
- 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
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Characterised By The Charging Evacuation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、慣性過給効果を利
用する内燃機関の過給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supercharger for an internal combustion engine utilizing an inertial supercharging effect.
【０００２】[0002]
【従来の技術】吸気通路長及び吸気管径等を適切に選択
すると、特定機関回転領域において慣性過給が実現さ
れ、吸気充填効率が増加し機関出力が向上することが公
知である。このような慣性過給を各機関回転数において
実現するために、吸気通路長を変化させる種々の提案が
なされている。実開昭６３−９６２３０号公報には、円
筒状のケース内に配置された円筒状のサージタンクを有
し、ケースとサージタンクとによって形成される環状空
間を吸気通路の一部として使用する吸気装置が開示され
ている。2. Description of the Related Art It is known that, when an intake passage length, an intake pipe diameter, and the like are appropriately selected, inertial supercharging is realized in a specific engine rotation region, intake charging efficiency is increased, and engine output is improved. In order to achieve such inertia supercharging at each engine speed, various proposals have been made to change the intake passage length. Japanese Utility Model Laid-Open Publication No. 63-96230 discloses an intake air having a cylindrical surge tank disposed in a cylindrical case, and using an annular space formed by the case and the surge tank as a part of an intake passage. An apparatus is disclosed.
【０００３】この吸気装置において、サージタンクは、
軸線方向に流入した吸気を側壁に形成された開口部から
流出させるものであり、それにより、サージタンクを回
動させることによって、吸気通路として使用する環状空
間の長さが連続的に変化し、低回転時から高回転時まで
慣性過給を実現することが可能となる。In this intake device, the surge tank is
The intake air flowing in the axial direction is caused to flow out from the opening formed in the side wall, whereby the length of the annular space used as the intake passage changes continuously by rotating the surge tank, It is possible to realize inertial supercharging from low rotation to high rotation.
【０００４】このような慣性過給効果は、高い機関出力
が必要な機関高負荷時には有効であるが、それほど高い
機関出力を必要としない機関低負荷時には、気筒内へ過
剰な吸気が供給されることになり、ディーゼル機関にお
いては圧縮行程におけるポンピング損失が増加するため
に燃料消費率が悪化する。また、ガソリン機関において
は過剰な吸気量に伴い燃料噴射量が増加されるために、
やはり燃料消費率が悪化する。このような問題を解決す
ることを意図して、機関低負荷時には慣性過給を実施し
ないようにすることが提案されている。[0004] Such an inertia supercharging effect is effective at a high engine load requiring a high engine output. However, at a low engine load not requiring a very high engine output, excessive intake is supplied into the cylinder. As a result, in a diesel engine, the pumping loss in the compression stroke increases, so that the fuel consumption rate deteriorates. Also, in a gasoline engine, since the fuel injection amount is increased due to the excessive intake air amount,
Again, the fuel consumption rate deteriorates. In order to solve such a problem, it has been proposed not to perform inertial supercharging when the engine is under a low load.
【０００５】[0005]
【発明が解決しようとする課題】図５は、アクセルペダ
ル踏み込み量が急激に減少した場合の吸入空気量と機関
回転数の変化を示すタイムチャートである。このタイム
チャートにおいて、機関回転数は、車速と共に変化する
ためにアクセルペダル踏み込み量の急激な減少に対して
も比較的緩やかに低下するが、吸入空気量はアクセルペ
ダル踏み込み量の急激な減少に対して比較的急激に減少
することが分かる。FIG. 5 is a time chart showing changes in the intake air amount and the engine speed when the depression amount of the accelerator pedal suddenly decreases. In this time chart, the engine speed changes with the vehicle speed, so that it decreases relatively slowly even when the accelerator pedal depression amount sharply decreases, but the intake air amount increases when the accelerator pedal depression amount suddenly decreases. It can be seen that it decreases relatively sharply.
【０００６】前述の内燃機関の過給装置において、円筒
状のサージタンクは比較的大きく重いものであり、比較
的緩やかにしか変化しない機関回転数には良好に追従さ
せてサージタンクを回動させることは可能であるが、比
較的急激に変化することのある吸入空気量、すなわち、
機関負荷に良好に追従させてサージタンクを回動させる
ことはできない。従って、特に、機関負荷が高負荷から
低負荷へ比較的急激に変化した時には、しばらくの間は
慣性過給が持続し、前述したように燃料消費率が悪化す
る。In the above-described supercharger for an internal combustion engine, the cylindrical surge tank is relatively large and heavy, and the surge tank is rotated by satisfactorily following the engine speed that changes only relatively slowly. Is possible, but the amount of intake air, which can change relatively rapidly,
It is not possible to turn the surge tank to follow the engine load well. Therefore, especially when the engine load changes relatively rapidly from a high load to a low load, inertia supercharging continues for a while, and the fuel consumption rate deteriorates as described above.
【０００７】従って、本発明の目的は、筒状部材を有
し、吸気系の一部を成す第１吸気通路部分が筒状部材の
内側に軸線方向に延在し、第１吸気通路部分の下流側に
おいて吸気系の一部を成す第２吸気通路部分が筒状部材
の外側に周方向に延在するように形成され、筒状部材に
は第１吸気通路部分と第２吸気通路部分とを連通するた
めの開口部が形成され、筒状部材を軸線回りに回動させ
ることによって開口部が軸線回りに移動し第２吸気通路
部分における有効吸気通路長が変化する内燃機関の過給
装置において、機関低負荷時の燃料消費率悪化を防止す
ることである。Accordingly, an object of the present invention is to provide a first intake passage portion having a tubular member, wherein a first intake passage portion forming a part of an intake system extends in the axial direction inside the tubular member. A second intake passage portion forming a part of the intake system on the downstream side is formed so as to extend in the circumferential direction outside the tubular member, and the tubular member has a first intake passage portion, a second intake passage portion, A supercharging device for an internal combustion engine, in which an opening for communicating with the internal combustion engine is formed, and the opening moves around the axis by rotating the cylindrical member about the axis, thereby changing the effective intake passage length in the second intake passage portion. It is an object of the present invention to prevent the fuel consumption rate from deteriorating at a low engine load.
【０００８】[0008]
【課題を解決するための手段】請求項１に記載の本発明
による内燃機関の過給装置は、筒状部材を有し、吸気系
の一部を成す第１吸気通路部分が前記筒状部材の内側に
軸線方向に延在し、前記第１吸気通路部分の下流側にお
いて前記吸気系の一部を成す第２吸気通路部分が前記筒
状部材の外側に周方向に延在するように形成され、前記
筒状部材には前記第１吸気通路部分と前記第２吸気通路
部分とを連通するための開口部が形成され、前記筒状部
材を軸線回りに回動させることによって前記開口部が軸
線回りに移動し前記第２吸気通路部分における有効吸気
通路長を慣性過給が起こるように変化させる内燃機関の
過給装置において、前記第２吸気通路部分の上流側端部
と下流側端部とを短絡する短絡手段を具備し、機関低負
荷時には前記短絡手段によって前記第２吸気通路部分の
前記上流側端部と前記下流側端部とを短絡させることを
特徴とする。According to a first aspect of the present invention, there is provided a supercharger for an internal combustion engine according to the present invention, comprising a tubular member, wherein a first intake passage portion forming a part of an intake system is provided with the tubular member. A second intake passage portion extending axially inward of the cylindrical member and forming a part of the intake system downstream of the first intake passage portion is formed so as to extend circumferentially outside the cylindrical member. An opening for communicating the first intake passage portion and the second intake passage portion is formed in the tubular member, and the opening is formed by rotating the tubular member around an axis. A supercharging device for an internal combustion engine that moves about an axis and changes an effective intake passage length in the second intake passage portion so that inertial supercharging occurs. And a short-circuit means for short-circuiting when the engine load is low. And wherein the shorting and the downstream end and the upstream end of the second intake passage portion by stages.
【０００９】この内燃機関の過給装置は、第２吸気通路
部分の上流側端部と下流側端部とを短絡する短絡手段を
具備し、機関低負荷時には短絡手段によって第２吸気通
路部分の上流側端部と下流側端部とが短絡されるため
に、機関低負荷時となると、吸気は、筒状部材の開口部
から第２吸気通路部分を下流側へ通過して内燃機関へ供
給されると共に、筒状部材の開口部から短絡手段を介し
て第２吸気通路部分の上流側端部から直接的に下流側端
部へ通過して内燃機関へ供給される。This supercharging device for an internal combustion engine includes short-circuit means for short-circuiting the upstream end and the downstream end of the second intake passage portion. Since the upstream end and the downstream end are short-circuited, when the engine is under a low load, the intake air passes through the second intake passage portion from the opening of the cylindrical member to the downstream side and is supplied to the internal combustion engine. At the same time, the gas is supplied from the opening of the cylindrical member to the internal combustion engine through the short-circuit means from the upstream end of the second intake passage portion directly to the downstream end.
【００１０】[0010]
【発明の実施の形態】図１は、本発明による内燃機関の
過給装置の第１実施形態を示す概略断面図である。同図
において、１は四気筒内燃機関本体、２はピストン、３
はシリンダボア、４は吸気弁、５は吸気ポート、６は排
気弁、７は吸気通路枝管、８は吸気通路長可変装置をそ
れぞれ示している。図２は、吸気通路長可変装置８の断
面を示す図１のＡ−Ａ断面図である。図１及び２を参照
すると、吸気通路長可変装置８は、円筒状の固定のケー
ス１１と、ケース１１内に同心配置された円筒状の筒状
部材１２を具備している。ケース１１と筒状部材１２と
の間の空間は、略Ｃ形状の三つの仕切壁１３によって軸
線方向に四分割されている。分割された四つの空間は、
それぞれ、一方の端部において端部壁１５によって閉塞
され、他方の端部において気筒毎の吸気ポート５を介し
て各シリンダボア３に連通している。FIG. 1 is a schematic sectional view showing a first embodiment of a supercharger for an internal combustion engine according to the present invention. In the figure, 1 is a four-cylinder internal combustion engine main body, 2 is a piston, 3
Represents a cylinder bore, 4 represents an intake valve, 5 represents an intake port, 6 represents an exhaust valve, 7 represents an intake passage branch pipe, and 8 represents an intake passage length variable device. FIG. 2 is a cross-sectional view taken along the line AA of FIG. Referring to FIGS. 1 and 2, the variable intake passage length device 8 includes a fixed cylindrical case 11 and a cylindrical tubular member 12 concentrically arranged in the case 11. The space between the case 11 and the tubular member 12 is divided into four in the axial direction by three substantially C-shaped partition walls 13. The four divided spaces are
Each is closed at one end by an end wall 15 and communicates with each cylinder bore 3 via an intake port 5 for each cylinder at the other end.
【００１１】端部壁１５には、分割された四つの空間毎
に弁部材３０が配置されている。各弁部材３０は、筒状
部材１２の長手方向に延在する共通の中央駆動軸３１に
固定され、ケース１１の外側に配置された駆動装置３２
によって、この中央駆動軸３１を介して同時に開閉され
るようになっている。弁部材３０は、第２吸気通路部分
１４の上流側端部と下流側端部とを短絡する短絡手段と
して機能する。A valve member 30 is arranged on the end wall 15 for each of the four divided spaces. Each valve member 30 is fixed to a common central drive shaft 31 extending in the longitudinal direction of the tubular member 12, and a driving device 32 disposed outside the case 11.
Thus, they are simultaneously opened and closed via the central drive shaft 31. The valve member 30 functions as short-circuit means for short-circuiting the upstream end and the downstream end of the second intake passage portion 14.
【００１２】筒状部材１２には、前述の四つの空間それ
ぞれに開口する四つの開口部１６が形成されている。こ
れらの開口部１６は、筒状部材１２への加工を容易にす
るために、四つの空間全てに開口する細長い単一の開口
部１６としても良い。筒状部材１２は、軸線方向の一端
部において閉塞され、他端部において軸線方向に延在す
る接続部１０によって吸気管１７に接続されている。吸
気管１７内にはスロットル弁１８が配置されている。The cylindrical member 12 is formed with four openings 16 that open into the above-mentioned four spaces. These openings 16 may be a single elongated opening 16 that opens to all four spaces in order to facilitate processing of the tubular member 12. The cylindrical member 12 is closed at one end in the axial direction, and is connected to the intake pipe 17 at the other end by a connection portion 10 extending in the axial direction. A throttle valve 18 is arranged in the intake pipe 17.
【００１３】このような構成において、筒状部材１２内
の空間は、サージタンクとして機能する吸気系の一部を
成す第１吸気通路部分９であり、筒状部材１２の軸線方
向に延在している。また、前述の四つの空間は、それぞ
れ、サージタンク等の吸気系拡管部の下流側で吸気系の
一部を成す第２吸気通路部分１４として、筒状部材１２
の外側に周方向に延在している。筒状部材１２に形成さ
れた開口部１６によって第１吸気通路部分と第２吸気通
路部分とは連通されている。それにより、前述の弁部材
３０が閉弁されていれば、吸気は、吸気管１７からスロ
ットル弁１８を介して第１吸気通路部分９に流入し、開
口部１６を介して各第２吸気通路部分１４へ流入し、各
吸気通路枝管７及び各吸気ポート５を介して各気筒へ供
給される。In such a configuration, the space inside the tubular member 12 is the first intake passage portion 9 which forms a part of an intake system functioning as a surge tank, and extends in the axial direction of the tubular member 12. ing. Further, the above-mentioned four spaces are respectively cylindrical members 12 as second intake passage portions 14 which form a part of the intake system on the downstream side of the intake system expansion section such as a surge tank.
And extends in the circumferential direction outside the. The first intake passage portion and the second intake passage portion communicate with each other through an opening 16 formed in the tubular member 12. As a result, if the above-described valve member 30 is closed, the intake air flows from the intake pipe 17 into the first intake passage portion 9 via the throttle valve 18, and the second intake passage 9 passes through the opening 16. It flows into the part 14 and is supplied to each cylinder via each intake passage branch pipe 7 and each intake port 5.
【００１４】筒状部材１２は、閉塞側端部において、駆
動軸１９を介して回動駆動装置２０に接続されている。
筒状部材１２の接続部１０と吸気管１７との接続は、回
動時においてもシール性を保証する構造となっている。
それにより、筒状部材１２は、回動駆動装置２０によっ
て、固定のケース１１及び吸気管１７に対して軸線回り
に回動可能となっている。The tubular member 12 is connected at its closed end to a rotary drive device 20 via a drive shaft 19.
The connection between the connection portion 10 of the tubular member 12 and the intake pipe 17 has a structure that ensures the sealing performance even during rotation.
Thereby, the cylindrical member 12 is rotatable around the axis with respect to the fixed case 11 and the intake pipe 17 by the rotation driving device 20.
【００１５】本実施形態の吸気通路長可変装置８は、回
転センサ等によって検出される機関回転数に基づき、筒
状部材１２を、機関回転数が低い時ほど図１において反
時計方向に回動させ、機関回転数が高い時ほど図１にお
いて時計方向に回動させるようになっている。それによ
り、機関回転数が低い時ほど、筒状部材１２の開口部１
６は、吸気通路枝管７側から離間し、前述の弁部材３０
が閉弁されていれば、吸気は開口部１６から第２吸気通
路部分１４を下流側へ通過してシリンダボア３内へ供給
され、図３に示すように、各第２吸気通路部分１４にお
ける有効吸気通路長Ｌが長くなる。すなわち、機関回転
数が低い時ほど、吸気系における吸気通路長が長くされ
る。The variable intake passage length device 8 of this embodiment rotates the tubular member 12 counterclockwise in FIG. 1 as the engine speed decreases, based on the engine speed detected by a rotation sensor or the like. In this case, the higher the engine speed, the more the clockwise rotation in FIG. Thus, as the engine speed decreases, the opening 1 of the tubular member 12 decreases.
6 is separated from the intake passage branch pipe 7 side, and
Is closed, the intake air passes from the opening 16 through the second intake passage portion 14 to the downstream side and is supplied into the cylinder bore 3, and as shown in FIG. The intake passage length L increases. That is, the lower the engine speed, the longer the intake passage length in the intake system.
【００１６】このようにして、端部壁１５に設けられた
弁部材３０が閉弁されていれば、低回転時から高回転時
までの各機関回転数において慣性過給を実現して吸気充
填効率を向上させることができる。弁部材３０は、図４
に示すように、エアフローメータ等によって検出される
吸入空気量Ｑを機関回転数Ｎで割った単位回転数当たり
の吸入空気量Ｑ／Ｎを機関負荷とし、この機関負荷Ｑ／
Ｎが所定値Ｂ以上となる時には閉弁され、各機関回転数
毎の慣性過給が実現される。In this manner, when the valve member 30 provided on the end wall 15 is closed, inertia supercharging is realized at each engine speed from low rotation to high rotation to achieve intake charging. Efficiency can be improved. The valve member 30 is shown in FIG.
As shown in FIG. 3, the intake air amount Q / N per unit rotation obtained by dividing the intake air amount Q detected by an air flow meter or the like by the engine rotation speed N is defined as the engine load.
When N becomes equal to or greater than the predetermined value B, the valve is closed, and inertial supercharging is realized for each engine speed.
【００１７】一方、機関負荷Ｑ／Ｎが所定値Ｂ未満とな
る機関低負荷時には、弁部材３０は開弁され、第２吸気
通路部分１４の上流側端部と下流側端部とが短絡され
る。それにより、この時には、機関回転数に応じた位置
に筒状部材１２は回動されているが、吸気は、筒状部材
１２の開口部１６から第２吸気通路部分１４を下流側へ
通過してシリンダボア３内へ供給されると共に、弁部材
３０を介して第２吸気通路部分１４の上流側端部から直
接的に下流側端部へ通過してシリンダボア３内へ供給さ
れる。On the other hand, when the engine load Q / N is less than the predetermined value B, the valve member 30 is opened and the upstream end and the downstream end of the second intake passage portion 14 are short-circuited. You. Thus, at this time, the tubular member 12 is rotated to a position corresponding to the engine speed, but the intake air passes through the second intake passage portion 14 from the opening 16 of the tubular member 12 to the downstream side. And is supplied into the cylinder bore 3 through the valve member 30 from the upstream end of the second intake passage portion 14 directly to the downstream end.
【００１８】このように、弁部材３０が開弁されれば、
筒状部材１２の開口部１６から吸気通路枝管７までの第
２吸気通路部分１４は二つの通路となり、第２吸気通路
部分１４における全体的な等価通路断面積が大きくなる
と共に、全体的な等価通路長は短くなり、現在の機関回
転数では慣性過給は起こらない。Thus, if the valve member 30 is opened,
The second intake passage portion 14 from the opening 16 of the tubular member 12 to the intake passage branch pipe 7 has two passages, and the overall equivalent passage cross-sectional area of the second intake passage portion 14 increases, and The equivalent passage length becomes shorter, and no inertial supercharging occurs at the current engine speed.
【００１９】弁部材３０は、筒状部材１２と比較してか
なり小型で軽量であり、小型の駆動装置３２によって容
易に開閉することができる。それにより、本実施形態に
よれば、機関負荷が高負荷から低負荷へ比較的急激に変
化しても、弁部材３０を瞬間的に開弁して慣性過給を直
ぐに中止することができ、低負荷となった時に慣性過給
が持続して燃料消費率が悪化することが防止される。ま
た、機関負荷が低負荷から高負荷へ比較的急激に変化す
る場合には、弁部材３０が瞬間的に閉弁されるために、
慣性過給を直ぐに再開することができ、それにより、車
両のもたつきが防止される。The valve member 30 is considerably smaller and lighter than the tubular member 12, and can be easily opened and closed by a small driving device 32. Thus, according to the present embodiment, even if the engine load changes relatively rapidly from a high load to a low load, the valve member 30 can be momentarily opened and the inertial supercharging can be immediately stopped, This prevents the inertia supercharging from continuing when the load becomes low and the fuel consumption rate from deteriorating. Further, when the engine load changes relatively rapidly from a low load to a high load, the valve member 30 is momentarily closed.
Inertia supercharging can be resumed immediately, thereby preventing rattling of the vehicle.
【００２０】また、弁部材３０を開弁すると、前述した
ように第２吸気通路部分１４における全体的な等価通路
断面積が大きくなると共に、全体的な等価通路長は短く
なるために、第２吸気通路部分１４における通路抵抗が
減少することになる。それにより、内燃機関の吸気行程
におけるポンピング損失が低減され、機関低負荷時の燃
料消費率をさらに改善することができる。When the valve member 30 is opened, as described above, the overall equivalent passage cross-sectional area of the second intake passage portion 14 increases, and the overall equivalent passage length decreases. The passage resistance in the intake passage portion 14 is reduced. As a result, pumping loss in the intake stroke of the internal combustion engine is reduced, and the fuel consumption rate at low engine load can be further improved.
【００２１】この吸気行程におけるポンピング損失低減
効果は、弁部材３０の閉弁時における第２吸気通路部分
１４の吸気通路長が長く通路抵抗が大きいほど、弁部材
３０を開弁した時の通路抵抗減少分が大きくなるために
顕著となり、すなわち、図１及び２に示す機関低回転時
が最も顕著となる。The effect of reducing the pumping loss in the intake stroke is such that the longer the intake passage length of the second intake passage portion 14 and the greater the passage resistance when the valve member 30 is closed, the greater the passage resistance when the valve member 30 is opened. The decrease is significant because the decrease is large, that is, the engine rotation is most noticeable at low engine speeds shown in FIGS.
【００２２】本実施形態の内燃機関の過給装置は、この
ように、機関負荷変化に対しては筒状部材１２を回動さ
せない。これは、筒状部材１２用の回動駆動装置２０の
寿命を増加させる。また、第２吸気通路部分１４は、吸
気通路枝管７の上側に延在するようにしたが、もちろ
ん、吸気通路枝管７の下側に延在させるようにしても良
い。それにより、内燃機関の下部から吸気系の上部まで
の高さが低くなり、車両搭載性が向上する。The supercharger for an internal combustion engine according to this embodiment does not rotate the tubular member 12 in response to a change in engine load. This increases the life of the rotary drive 20 for the tubular member 12. Further, the second intake passage portion 14 is configured to extend above the intake passage branch pipe 7, but may, of course, extend below the intake passage branch pipe 7. Thereby, the height from the lower part of the internal combustion engine to the upper part of the intake system is reduced, and the mountability on the vehicle is improved.
【００２３】[0023]
【発明の効果】このように、本発明による内燃機関の過
給装置によれば、筒状部材を有し、吸気系の一部を成す
第１吸気通路部分が筒状部材の内側に軸線方向に延在
し、第１吸気通路部分の下流側において吸気系の一部を
成す第２吸気通路部分が筒状部材の外側に周方向に延在
するように形成され、筒状部材には第１吸気通路部分と
第２吸気通路部分とを連通するための開口部が形成さ
れ、筒状部材を軸線回りに回動させることによって開口
部が軸線回りに移動し第２吸気通路部分における有効吸
気通路長を慣性過給が起こるように変化させる内燃機関
の過給装置において、機関低負荷時には短絡手段によっ
て第２吸気通路部分の上流側端部と下流側端部とが短絡
されるために、この時に、第２吸気通路部分は、筒状部
材の開口部から下流側へ向かう通路と、筒状部材の開口
部から短絡手段を介して第２吸気通路部分の上流側端部
から直接的に下流側端部へ向かう通路との二つとなり、
それにより慣性過給が中止され過剰な吸気が気筒内へ供
給されないために、機関低負荷時の燃料消費率悪化を防
止することができる。As described above, according to the supercharging device for an internal combustion engine according to the present invention, the first intake passage portion having the cylindrical member and forming a part of the intake system is disposed inside the cylindrical member in the axial direction. And a second intake passage portion forming a part of the intake system downstream of the first intake passage portion is formed so as to extend in the circumferential direction outside the cylindrical member, and the cylindrical member includes a second intake passage portion. An opening for communicating between the first intake passage portion and the second intake passage portion is formed, and by rotating the cylindrical member around the axis, the opening moves around the axis and the effective intake air in the second intake passage portion is formed. In a supercharging device for an internal combustion engine that changes the passage length so that inertial supercharging occurs, the upstream end and the downstream end of the second intake passage portion are short-circuited by the short-circuiting means when the engine is under a low load. At this time, the second intake passage portion is located downstream from the opening of the tubular member. A passage towards becomes a two a passage directed directly to the downstream end from the upstream end of the second intake passage portion through the short-circuit means from the opening of the tubular member,
As a result, inertia supercharging is stopped and excessive intake air is not supplied into the cylinder, so that it is possible to prevent the fuel consumption rate from deteriorating at a low engine load.
【図１】本発明による内燃機関の過給装置の第１実施形
態を示す概略断面図である。FIG. 1 is a schematic sectional view showing a first embodiment of a supercharging device for an internal combustion engine according to the present invention.
【図２】図１のＡ−Ａ断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】機関回転数に対する第２吸気通路部分の有効吸
気通路長の関係を示すグラフである。FIG. 3 is a graph showing a relationship between an engine speed and an effective intake passage length of a second intake passage portion.
【図４】弁部材の開閉制御のためのマップである。FIG. 4 is a map for controlling opening and closing of a valve member.
【図５】アクセルペダル踏み込み量が急激に減少した場
合の吸入空気量と機関回転数の変化を示すタイムチャー
トである。FIG. 5 is a time chart showing changes in the intake air amount and the engine speed when the accelerator pedal depression amount sharply decreases.
１…機関本体 ４…吸気弁 ５…吸気ポート ７…吸気通路枝管 ８…吸気通路長可変装置 ９…第１吸気通路部分 １２…筒状部材 １４…第２吸気通路部分 ３０…弁部材 DESCRIPTION OF SYMBOLS 1 ... Engine main body 4 ... Intake valve 5 ... Intake port 7 ... Intake passage branch pipe 8 ... Intake passage length variable device 9 ... 1st intake passage portion 12 ... Cylindrical member 14 ... 2nd intake passage portion 30 ... Valve member
Claims (1)
１吸気通路部分が前記筒状部材の内側に軸線方向に延在
し、前記第１吸気通路部分の下流側において前記吸気系
の一部を成す第２吸気通路部分が前記筒状部材の外側に
周方向に延在するように形成され、前記筒状部材には前
記第１吸気通路部分と前記第２吸気通路部分とを連通す
るための開口部が形成され、前記筒状部材を軸線回りに
回動させることによって前記開口部が軸線回りに移動し
前記第２吸気通路部分における有効吸気通路長を慣性過
給が起こるように変化させる内燃機関の過給装置におい
て、前記第２吸気通路部分の上流側端部と下流側端部と
を短絡する短絡手段を具備し、機関低負荷時には前記短
絡手段によって前記第２吸気通路部分の前記上流側端部
と前記下流側端部とを短絡させることを特徴とする内燃
機関の過給装置。1. A first intake passage portion having a cylindrical member and forming a part of an intake system extends axially inside the cylindrical member, and the first intake passage portion is provided on a downstream side of the first intake passage portion. A second intake passage portion forming a part of an intake system is formed so as to extend in a circumferential direction outside the tubular member, and the tubular member has the first intake passage portion and the second intake passage portion. And an opening for communicating with the cylindrical member. By rotating the cylindrical member around the axis, the opening moves around the axis, and the inertial supercharging increases the effective intake passage length in the second intake passage portion. A supercharging device for an internal combustion engine which is changed to occur so as to include a short-circuit means for short-circuiting an upstream end and a downstream end of the second intake passage portion, and the second short-circuit means is provided by the short-circuit means at a low engine load. The upstream end and the downstream end of the intake passage portion; A supercharging device for an internal combustion engine, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9071420A JPH10266861A (en) | 1997-03-25 | 1997-03-25 | Supercharging device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9071420A JPH10266861A (en) | 1997-03-25 | 1997-03-25 | Supercharging device for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10266861A true JPH10266861A (en) | 1998-10-06 |
Family
ID=13460012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9071420A Pending JPH10266861A (en) | 1997-03-25 | 1997-03-25 | Supercharging device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10266861A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008286155A (en) * | 2007-05-21 | 2008-11-27 | Toyota Motor Corp | Internal combustion engine control unit |
-
1997
- 1997-03-25 JP JP9071420A patent/JPH10266861A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008286155A (en) * | 2007-05-21 | 2008-11-27 | Toyota Motor Corp | Internal combustion engine control unit |
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