JP2001304045A - Exhaust re-circulation gas leading part structure for engine - Google Patents
Exhaust re-circulation gas leading part structure for engineInfo
- Publication number
- JP2001304045A JP2001304045A JP2000129597A JP2000129597A JP2001304045A JP 2001304045 A JP2001304045 A JP 2001304045A JP 2000129597 A JP2000129597 A JP 2000129597A JP 2000129597 A JP2000129597 A JP 2000129597A JP 2001304045 A JP2001304045 A JP 2001304045A
- Authority
- JP
- Japan
- Prior art keywords
- guide member
- passage
- exhaust gas
- egr gas
- intake
- 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は排気ガスを吸気装置
に再循環させる排気ガス還流装置から導入される排気還
流ガスの吸気装置への導入部の形状に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shape of a portion for introducing an exhaust gas recirculation gas introduced from an exhaust gas recirculation device for recirculating exhaust gas to an intake device to the intake device.
【０００２】[0002]
【従来の技術】近年、自動車などのエンジンの排気ガス
による大気汚染などの環境問題に伴い、その対策として
排気ガス中に含まれる有害物質、特に窒素酸化物（ＮＯ
ｘという）の発生を効果的に抑制する排気ガス還流（Ｅ
ＧＲという）装置が用いられるようになっている。この
ＥＧＲ装置は、排気ガスの一部を吸気装置に導入する
（還流させる）ことによって、排気ガスに含まれる不活
性ガスがエンジンの燃焼室内での燃焼を緩慢にし、燃焼
温度を低下させることで、高温燃焼時に空気中の窒素と
反応して生成されるＮＯｘの生成量を抑制するものであ
る。2. Description of the Related Art In recent years, along with environmental problems such as air pollution caused by exhaust gas from engines of automobiles and the like, harmful substances contained in exhaust gas, particularly nitrogen oxides (NO
x) that effectively suppresses the occurrence of exhaust gas recirculation (E
A device (referred to as GR) is used. This EGR device introduces (recirculates) a part of the exhaust gas into an intake device, whereby inert gas contained in the exhaust gas slows down the combustion in the combustion chamber of the engine and lowers the combustion temperature. It suppresses the amount of NOx produced by reacting with nitrogen in the air during high-temperature combustion.
【０００３】一方、ＥＧＲ装置によって排出ガスが還流
されるエンジンの吸気装置は、吸入空気をエンジンの気
筒間に分配し、燃焼室に供給する機能を持つ。そのた
め、ＥＧＲガスの吸気装置への導入の際に各気筒への導
入量にばらつきが生じると、ＥＧＲガス中に含まれる不
活性ガスによってエンジンの燃焼の安定性やエミッショ
ンが悪化するという問題が起こる。On the other hand, an intake device of an engine in which exhaust gas is recirculated by an EGR device has a function of distributing intake air between cylinders of the engine and supplying the air to a combustion chamber. Therefore, when the amount of EGR gas introduced into each intake cylinder varies, the inert gas contained in the EGR gas degrades the stability and emission of combustion of the engine. .
【０００４】そのため、ＥＧＲガスをエンジンの各気筒
にできるだけ均等に導入するための構造については、特
開平８−３１２４６８号公報（第１の従来技術という）
などに開示されているように数々の提案がなされてい
る。[0004] For this reason, a structure for introducing EGR gas into each cylinder of the engine as uniformly as possible is disclosed in Japanese Patent Laid-Open Publication No. Hei 8-31468 (referred to as a first prior art).
Numerous proposals have been made as disclosed in US Pat.
【０００５】[0005]
【発明が解決しようとする課題】ところで、吸気装置に
取り付けられ、吸気装置内を流れる吸入空気量を制御す
るスロットルボデーのスロットルバルブの下流側には、
特開平１０−３２５３６７号公報（第２の従来技術とい
う）に開示されているように、吸入空気の流れに逆らっ
て、上流側に逆流しようとする流れの領域（逆流域）が
発生する。On the downstream side of the throttle valve of the throttle body, which is attached to the intake device and controls the amount of intake air flowing through the intake device,
As disclosed in Japanese Patent Application Laid-Open No. H10-325367 (hereinafter referred to as a second prior art), a flow region (backflow region) in which a flow tends to flow upstream toward the upstream side occurs against the flow of intake air.
【０００６】第１の従来技術においては、ＥＧＲガスの
導入部がスロットルボデー付近に設けられているため、
スロットルバルブによる逆流域にＥＧＲガスが導入され
ているため、ＥＧＲガスがスロットルバルブ付近まで逆
流しやすく、デポジット（堆積物）がスロットルバルブ
やスロットルボアに溜まりやすい。このデポジットはス
ロットルバルブの開閉をしにくくして、エンジンの応答
性を悪化させたり、スロットルバルブが開閉不能となっ
て吸入空気量を制御できなくなったりといった、スロッ
トルバルブの作動性に悪影響を与える恐れを生じる。ま
た、第１の従来技術に示されているように、案内部材の
導入部が孔部で構成されている場合には、ＥＧＲガスに
よるデポジットが孔部に詰まってＥＧＲガスが吸入空気
に導入されなくなったり、導入される量が変化したりし
て、エンジンの各気筒へのＥＧＲガスの分配にばらつき
が生じたりする可能性があった。[0006] In the first prior art, since the introduction portion of the EGR gas is provided near the throttle body,
Since the EGR gas is introduced into the reverse flow region by the throttle valve, the EGR gas easily flows backward to the vicinity of the throttle valve, and deposits (deposits) easily accumulate in the throttle valve and the throttle bore. This deposit may adversely affect the operability of the throttle valve, such as making it difficult to open and close the throttle valve, deteriorating the responsiveness of the engine, and making it impossible to control the intake air volume due to the inability to open and close the throttle valve. Is generated. Further, as shown in the first prior art, when the introduction portion of the guide member is constituted by a hole, the deposit by the EGR gas is blocked in the hole, and the EGR gas is introduced into the intake air. There is a possibility that the distribution of the EGR gas to each cylinder of the engine may vary due to disappearance or a change in the amount introduced.
【０００７】一方、第２の従来技術においては、スロッ
トルバルブの逆流域にＥＧＲガスを導入するため、ＥＧ
Ｒガスはスロットルバルブ付近まで逆流し、スロットル
バルブとスロットルボアへのＥＧＲガスによるデポジッ
トの付着が起こる可能性がある。そのため、第１の従来
技術と同様にスロットルバルブの作動性に問題を生じる
恐れがある。On the other hand, in the second prior art, since the EGR gas is introduced into the reverse flow region of the throttle valve, the EGR gas is introduced.
The R gas flows backward to the vicinity of the throttle valve, and there is a possibility that deposits of the EGR gas to the throttle valve and the throttle bore adhere to the throttle valve and the throttle bore. Therefore, there is a possibility that a problem may occur in the operability of the throttle valve as in the first related art.
【０００８】それゆえ、本発明は、ＥＧＲガスの分配性
の向上と、スロットルバルブへのＥＧＲガスの逆流と、
ＥＧＲガスによるデポジットの付着の防止し、安定した
作動を実現するＥＧＲガスの導入部構造を提供すること
を、その課題とする。Therefore, the present invention improves the distribution of EGR gas, reverses the flow of EGR gas to the throttle valve,
It is an object of the present invention to provide a structure for introducing an EGR gas which prevents deposits caused by the EGR gas and realizes stable operation.
【０００９】[0009]
【課題を解決するための手段】上記した課題を解決する
ために請求項１の発明にて講じた技術的手段は、エンジ
ンの排気ガスの一部を吸気通路内に還流させる排気ガス
還流通路と、前記吸気通路の吸入空気量をスロットルバ
ルブの開度によって制御するスロットルボデーと、前記
吸気通路の内壁面に沿って配置された円筒状の第１案内
部材と、該第１案内部材の外周面と前記吸気通路の内壁
面とで構成され、前記吸気通路の下流側に延びる円環状
の排気ガス導入通路と、を備えてなるエンジンの吸気装
置において、前記第１案内部材に前記排気導入通路の円
周方向の相対的な連通を一部分だけ遮断する阻止手段を
前記開口部側と、対向する他方の側とに設けたことであ
る。According to the present invention, there is provided an exhaust gas recirculation passage for recirculating a part of exhaust gas of an engine into an intake passage. A throttle body for controlling an intake air amount of the intake passage by an opening degree of a throttle valve, a cylindrical first guide member disposed along an inner wall surface of the intake passage, and an outer peripheral surface of the first guide member And an annular exhaust gas introduction passage formed by the first guide member and the inner wall surface of the intake passage, the annular exhaust gas introduction passage extending downstream of the intake passage. The blocking means for blocking only a part of the relative communication in the circumferential direction is provided on the opening side and the opposite side.
【００１０】上記した手段によれば、阻止部材を設ける
ことによって、第１案内部材（円環状の排気ガス導入通
路）の円周方向への連通が妨げられるので、ＥＧＲガス
の流れの強さによって、開口部側または、他方の側の一
方だけにＥＧＲガスが偏って導入されることを防ぐこと
ができ、分配性を向上させることができる。According to the above-described means, the provision of the blocking member prevents the communication of the first guide member (annular exhaust gas introduction passage) in the circumferential direction. In addition, it is possible to prevent the EGR gas from being unbalancedly introduced into only one of the opening side and the other side, and to improve the distribution.
【００１１】尚、前記阻止手段が、前記第１案内部材の
円周面の一部を突出させることによって形成されている
こと、前記第１案内部材の長さが前記スロットルバルブ
によって形成される逆流域よりも長いことが望ましい。The blocking means is formed by protruding a part of the circumferential surface of the first guide member, and the length of the first guide member is reversed by the throttle valve. Desirably longer than the basin.
【００１２】[0012]
【発明の実施の形態】本発明に従った実施の形態を図面
に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the drawings.
【００１３】図１は、本発明の第１実施形態を示す第１
案内部材の斜視図である。FIG. 1 shows a first embodiment of the present invention.
It is a perspective view of a guide member.
【００１４】図１において、第１案内部材１０は中空円
筒形状を有し、中空部は吸入空気通路１３を構成してい
る。第１案内部材１０の外周面１０ａからは、その一部
が突出して阻止部材１２ａが形成されている。一般的に
ＥＧＲガスは高温で腐食性を有するため、第１案内部材
１０には、耐食性に優れた材料、例えばステンレスなど
を用いることが望ましい。In FIG. 1, the first guide member 10 has a hollow cylindrical shape, and the hollow portion constitutes an intake air passage 13. A part of the first guide member 10 protrudes from the outer peripheral surface 10a to form a blocking member 12a. Generally, since the EGR gas is corrosive at a high temperature, it is desirable to use a material having excellent corrosion resistance, for example, stainless steel, for the first guide member 10.
【００１５】図２、図４は、本発明の実施形態の取付状
態と、導入されたＥＧＲガスの流れを示す図面である。
図２は、ＥＧＲガスの流量が少ない状態を、図４は、多
い状態を示す。FIGS. 2 and 4 are views showing the mounting state of the embodiment of the present invention and the flow of the introduced EGR gas.
FIG. 2 shows a state where the flow rate of the EGR gas is low, and FIG. 4 shows a state where the flow rate is high.
【００１６】図２、図４において、吸気装置２の最上流
部にはスロットルボデー１が螺合などによって取り付け
られている。スロットルボデー１は、その内部のスロッ
トルボア１ｂ内に設けられたバタフライバルブ１ａ（ス
ロットルバルブ）を軸１ｃによって回転させて、バルブ
１ａとボア１ｂとで形成される開口面積を増減させて下
流の吸気通路２ａに供給する吸入空気量を制御する。吸
気装置２には、ＥＧＲガス量を制御する図視しないＥＧ
Ｒバルブが取り付けられるＥＧＲ取付部４が設けられて
いる。ＥＧＲ取付部４の内部には、排気ガス還流通路４
ａが、吸気通路２ａと略直交する方向から、下流側に向
かって所定の角度を持って設けられ、図示しないエンジ
ンの排気通路から排出される排気ガスの一部がＥＧＲガ
スとして吸気通路２ａに導入される。また、吸気通路２
ａ内部には、第１案内部材１０が取り付けられ、その外
周面１０ａと、吸気通路２の内周面２ｂとで形成される
円環状の空間がＥＧＲ導入通路３を構成する。第１案内
部材１０の長さＬは、スロットルバルブ１ａによる図示
しない逆流域の長さよりも長くなるように形成されてい
る。ＥＧＲ導入通路３とＥＧＲ還流通路４ａとは、開口
部４ｂによって連通されている。ＥＧＲ導入通路３は、
第１案内部材１０の阻止部材１２ａ、１２ｂによって、
ＥＧＲ還流通路４ａの円周方向に連通不能な部分が形成
されている。開口部４ｂ側の阻止部材１２ａは、開口部
４ｂのすぐ下流に所定量の長さを持って延設されてい
る。連通部と対向する側の阻止部材１２ｂも開口部４ｂ
側の阻止部材１２ａと対称に設けられている。2 and 4, a throttle body 1 is attached to the most upstream portion of the intake device 2 by screwing or the like. The throttle body 1 rotates a butterfly valve 1a (throttle valve) provided in a throttle bore 1b inside the throttle body 1 by a shaft 1c to increase or decrease an opening area formed by the valve 1a and the bore 1b, thereby obtaining downstream intake air. The amount of intake air supplied to the passage 2a is controlled. The intake device 2 includes an unillustrated EG for controlling the EGR gas amount.
An EGR mounting part 4 to which the R valve is mounted is provided. An exhaust gas recirculation passage 4 is provided inside the EGR mounting portion 4.
a is provided at a predetermined angle from a direction substantially perpendicular to the intake passage 2a toward the downstream side, and a part of exhaust gas discharged from an exhaust passage (not shown) of the engine is supplied to the intake passage 2a as EGR gas. be introduced. Also, the intake passage 2
A first guide member 10 is mounted inside a, and an annular space formed by an outer peripheral surface 10 a and an inner peripheral surface 2 b of the intake passage 2 constitutes the EGR introduction passage 3. The length L of the first guide member 10 is formed to be longer than the length of a reverse flow region (not shown) by the throttle valve 1a. The EGR introduction passage 3 and the EGR recirculation passage 4a are connected by an opening 4b. The EGR introduction passage 3 is
By the blocking members 12a and 12b of the first guide member 10,
A portion that cannot communicate with the EGR recirculation passage 4a in the circumferential direction is formed. The blocking member 12a on the side of the opening 4b extends just downstream of the opening 4b with a predetermined length. The blocking member 12b on the side facing the communication portion also has the opening 4b.
It is provided symmetrically with the blocking member 12a on the side.
【００１７】図２乃至図４、及び図７、図８を用いて第
１実施形態のＥＧＲガスの流量が少ない状態での本発明
による作用について説明する。The operation of the first embodiment of the present invention in a state where the flow rate of the EGR gas is small will be described with reference to FIGS. 2 to 4 and FIGS.
【００１８】図３は、図２に示すＢ矢視図であり、図
７、図８は阻止部材が設けられていない案内部材が挿入
されている吸気装置を示す図面である。図７、図８は、
図２、図３に示す第１案内部材１０を阻止部材１２ａ、
１２ｂが設けられていない第１案内部材１１０としたも
ので、その他の構成は同じであるため、図７及び図８に
おいて、図２及び図３と同じ構成には同じ番号符号又は
図２及び図３で付した番符号に１００を加えた番号符号
を付すことで説明を省略する。FIG. 3 is a view taken in the direction of arrow B shown in FIG. 2, and FIGS. 7 and 8 are views showing an intake device in which a guide member without a blocking member is inserted. FIG. 7 and FIG.
The first guide member 10 shown in FIGS.
Since the first guide member 110 is not provided with the first guide member 12b and the other configuration is the same, in FIGS. 7 and 8, the same components as those in FIGS. The description is omitted by attaching the number code obtained by adding 100 to the number code added in 3.
【００１９】図７、図８において、排気ガス還流通路４
ａから導入されたＥＧＲガスは、第１案内部材１１０の
外周面上のポイントＸで第１案内部材１１０と衝突す
る。このとき、ＥＧＲガスの流量は少なく、その流速は
遅い。そのため、ＥＧＲガスは第１案内部材１１０との
衝突によって運動エネルギーを失ったＥＧＲガスは、図
８に示すように第１案内部材１１０の外周面に沿って流
れて開口部４ｂと対向する側まで到達するものよりも、
図７、図８に示すように第１案内部材１１０の外周面と
衝突するポイントＸ付近で滞留したり、第１案内部材１
１０とは衝突せずに、開口部４ｂから直接ＥＧＲ導入通
路３へ流れるものの方が多くなる。そのため、図８中の
上下方向の分配は略均等になると考えられるが、図８中
の左右方向の分配は不均衡となる（右側の方が多い）。7 and 8, the exhaust gas recirculation passage 4
The EGR gas introduced from a collides with the first guide member 110 at a point X on the outer peripheral surface of the first guide member 110. At this time, the flow rate of the EGR gas is small, and the flow rate is slow. Therefore, the EGR gas that has lost its kinetic energy due to the collision with the first guide member 110 flows along the outer peripheral surface of the first guide member 110 as shown in FIG. Than to reach
As shown in FIGS. 7 and 8, the first guide member 110 stays near the point X where it collides with the outer peripheral surface of the first guide member 110.
The number that flows directly from the opening 4b to the EGR introduction passage 3 without colliding with the number 10 increases. Therefore, the distribution in the up-down direction in FIG. 8 is considered to be substantially equal, but the distribution in the left-right direction in FIG. 8 becomes unbalanced (the right side is more).
【００２０】しかし、図２、図３、図４に示すように、
第１案内部材１０に設けられた阻止部材１２ａによっ
て、ポイントＸ付近に滞留している、またはＥＧＲガス
導入通路３に直接導入されるＥＧＲガスは、吸気通路２
ａの下流方向に流れる際に阻止部材１２ａと衝突し、Ｅ
ＧＲガスの流れを図中上方向または、下方向に変えるこ
とができる。これによって導入されたＥＧＲガスをより
均等に分配することができる。However, as shown in FIGS. 2, 3 and 4,
The EGR gas remaining near the point X or directly introduced into the EGR gas introduction passage 3 by the blocking member 12 a provided on the first guide member 10 is supplied to the intake passage 2.
a when it collides with the blocking member 12a when flowing in the downstream direction of
The flow of the GR gas can be changed upward or downward in the figure. Thereby, the introduced EGR gas can be more evenly distributed.
【００２１】図５、図６、図９、図１０を用いて本発明
の実施形態のＥＧＲガスの流量が多い状態での作用につ
いて説明する。図９、図１０は阻止部材が設けられてい
ない案内部材が挿入されている吸気装置を示す図面であ
る。図９、図１０は、図５、図６に示す第１案内部材１
０を阻止部材１２ａ、１２ｂが設けられていない第１案
内部材１１０としたもので、その他の構成は同じである
ため、図９及び図１０において、図５及び図６と同じ構
成には同じ番号符号又は図５及び図６で付した番号符号
に１００を加えた番号符号を付すことで説明を省略す
る。The operation of the embodiment of the present invention when the flow rate of the EGR gas is large will be described with reference to FIGS. 5, 6, 9 and 10. 9 and 10 are views showing the intake device in which a guide member without a blocking member is inserted. 9 and 10 show the first guide member 1 shown in FIGS.
0 is the first guide member 110 without the blocking members 12a and 12b, and the other configurations are the same. Therefore, in FIGS. 9 and 10, the same components as those in FIGS. 5 and 6 have the same reference numerals. The description is omitted by attaching the reference numerals or the reference numerals obtained by adding 100 to the reference numerals given in FIGS. 5 and 6.
【００２２】図９、図１０において、図示しない排気通
路から導入されたＥＧＲガスは、第１案内部材１１０の
外周面上のポイントＸで第１案内部材１１０と衝突す
る。このとき、ＥＧＲガスの流量は多く、その流速は速
いため、衝突によってＥＧＲガスの運動エネルギーは失
われても、図９、図１０に示すように第１案内部材１１
０の周方向に沿って開口部４ｂと対向する側へとＥＧＲ
ガスは流れる。そのため、ＥＧＲガスは、図１０に示す
ように、開口部４ｂと対向する側で衝突して滞留し、そ
のまま対向する側だけに多くのＥＧＲガスが導入され
る。このため、開口部４ｂ側に導入されるＥＧＲガスの
量は非常には少なくなる。9 and 10, the EGR gas introduced from an exhaust passage (not shown) collides with the first guide member 110 at a point X on the outer peripheral surface of the first guide member 110. At this time, since the flow rate of the EGR gas is large and its flow velocity is high, even if the kinetic energy of the EGR gas is lost due to the collision, the first guide member 11 as shown in FIGS.
EGR toward the side facing the opening 4b along the circumferential direction of
Gas flows. Therefore, as shown in FIG. 10, the EGR gas collides and stays on the side facing the opening 4b, and a large amount of the EGR gas is introduced only to the side facing the opening 4b. For this reason, the amount of the EGR gas introduced into the opening 4b becomes very small.
【００２３】しかし、図５、図６に示すように第１案内
部材１０に阻止部材１２ｂを設けたことによって、図
９、図１０に示すように第１案内部材１０（１１０）の
外周面に沿って流れたＥＧＲガス同士が衝突せずに、阻
止部材１２ｂと衝突して第１案内部材１０の外周面に沿
って、図５に示すように開口部４ｂ側へと向かう（戻
る）流れと、図６に示すような上下方向に分かれる流れ
とに分けられる。これによって、開口部４ｂと対向する
側に多く導入されていたＥＧＲガスは、図６中の上下方
向に略均等に導入されるようになる。However, by providing the first guide member 10 with the blocking member 12b as shown in FIGS. 5 and 6, the outer circumferential surface of the first guide member 10 (110) is formed as shown in FIGS. The EGR gases flowing along the flow path do not collide with each other, but collide with the blocking member 12b and flow (return) toward the opening 4b side along the outer peripheral surface of the first guide member 10 as shown in FIG. , And flows divided in the vertical direction as shown in FIG. As a result, the EGR gas that has been mostly introduced on the side facing the opening 4b is almost uniformly introduced in the vertical direction in FIG.
【００２４】上記したように、本発明によれば、阻止部
材によって円環状に構成されたＥＧＲガス導入通路の円
周方向の連通を遮断することで、ＥＧＲガスの流れの強
弱による、ＥＧＲガスが導入される位置のばらつきを低
減することによって、エンジンの各気筒への分配性を向
上させることができるので有利である。As described above, according to the present invention, the blocking of the circumferential direction of the annular EGR gas introduction passage by the blocking member allows the EGR gas to flow due to the strength of the flow of the EGR gas. Advantageously, by reducing the variation of the introduced position, the distribution of the engine to each cylinder can be improved.
【００２５】[0025]
【発明の効果】以上の如く、請求項１の発明によれば、
ＥＧＲガス導入通路内の円周方向の連通を阻止する阻止
部材によって、ＥＧＲガスの流量が少なく、その流速が
遅いときと、ＥＧＲガスの流量は多く、その流速が速い
場合ときでのＥＧＲガスの導入位置に生じていたばらつ
きを低減させたことによって、ＥＧＲガスの各気筒への
分配を向上させることができる。As described above, according to the first aspect of the present invention,
The blocking member for blocking the communication in the circumferential direction in the EGR gas introduction passage has a low flow rate of the EGR gas and a low flow rate, and a high flow rate of the EGR gas and a high flow rate of the EGR gas. By reducing the variation occurring at the introduction position, the distribution of the EGR gas to each cylinder can be improved.
【００２６】また、請求項２の発明によれば、阻止手段
が、第１案内部材の円周面の一部が突出して形成されて
いることによって、部品点数の増加や、生産性を低下さ
せることなく阻止手段を形成することができる。According to the second aspect of the present invention, since the blocking means is formed by projecting a part of the circumferential surface of the first guide member, the number of parts is increased and productivity is reduced. The blocking means can be formed without the need.
【００２７】加えて、請求項３の発明によればスロット
ルボデーによる逆流域の長さよりも、第１案内部材の長
さの方が長くなるようにしたことによって、ＥＧＲガス
が吸気通路に導入される位置を逆流域よりも下流にする
ことができる。これによって、スロットルボデーへのＥ
ＧＲガスの逆流を防ぐことができ、スロットルバルブへ
のデポジットの付着などを防止することができる。In addition, according to the third aspect of the present invention, the length of the first guide member is made longer than the length of the reverse flow region by the throttle body, so that the EGR gas is introduced into the intake passage. Can be located downstream of the backflow area. As a result, E to the throttle body
It is possible to prevent the backflow of the GR gas and to prevent the deposit from adhering to the throttle valve.
【図１】本発明の第１案内部材を示す斜視図である。FIG. 1 is a perspective view showing a first guide member of the present invention.
【図２】図２は、本発明の第１案内部材の取付状態と、
導入されたＥＧＲガスの流れを示す図面であり、ＥＧＲ
ガスの流量が少ない場合を示す。FIG. 2 is a view showing a state in which a first guide member according to the present invention is mounted;
FIG. 4 is a view showing a flow of introduced EGR gas,
This shows the case where the gas flow rate is small.
【図３】図２に示すＢ矢視図である。FIG. 3 is a view taken in the direction of arrow B shown in FIG. 2;
【図４】図２に示すＡ−Ａ断面図である。FIG. 4 is a sectional view taken along the line AA shown in FIG. 2;
【図５】図５は、本発明の第１案内部材の取付状態と、
導入されたＥＧＲガスの流れを示す図面であり、ＥＧＲ
ガスの流量が多い場合を示す。FIG. 5 is a perspective view showing a state in which a first guide member according to the present invention is mounted;
FIG. 4 is a view showing a flow of introduced EGR gas,
This shows the case where the gas flow rate is large.
【図６】図５に示すＣ−Ｃ断面図である。FIG. 6 is a sectional view taken along the line CC shown in FIG. 5;
【図７】図２に示す第１案内部材を阻止部材が設けられ
ていないものとしたときのＥＧＲガスの流れを示す図面
であり、ＥＧＲガスの流量が少ない場合を示す。7 is a view showing a flow of the EGR gas when the first guide member shown in FIG. 2 is not provided with a blocking member, and shows a case where the flow rate of the EGR gas is small.
【図８】図７に示すＤ−Ｄ断面図である。FIG. 8 is a sectional view taken along the line DD shown in FIG. 7;
【図９】図５の第１案内部材を阻止部材が設けられてい
ないものとしたときのＥＧＲガスの流れを示す図面であ
り、ＥＧＲガスの流量が多い場合を示す。9 is a view showing a flow of the EGR gas when the first guide member of FIG. 5 is provided with no blocking member, and shows a case where the flow rate of the EGR gas is large.
【図１０】図９に示すＦ−Ｆ断面図である。FIG. 10 is a sectional view taken along the line FF shown in FIG. 9;
１・・スロットルボデー １ａ・・スロットルバルブ １ｂ・・スロットルボア １ｃ・・スロットル軸 ２・・吸気装置 ２ａ・・吸気通路 ２ｂ・・内壁面 ３・・排気ガス導入通路 ４・・ＥＧＲ取付部 ４ａ・・排気ガス還流通路 ４ｂ・・開口部 １０、１１０・・第１案内部材 １０ａ・・外周面 １０ｂ・・内周面 １０ｃ・・前端部 １０ｄ・・後端部 １２ａ、１２ｂ・・阻止手段 １３・・吸入空気通路（中空部） 1 Throttle body 1a Throttle valve 1b Throttle bore 1c Throttle shaft 2 Intake device 2a Intake passage 2b Inner wall surface 3 Exhaust gas introduction passage 4 EGR mounting portion 4a -Exhaust gas recirculation passage 4b-Opening 10, 110-First guide member 10a-Outer peripheral surface 10b-Inner peripheral surface 10c-Front end 10d-Rear end 12a, 12b-Blocking means 13・ Intake air passage (hollow)
Claims (3)
に還流させる排気ガス還流通路と、前記吸気通路の吸入
空気量をスロットルバルブの開度によって制御するスロ
ットルボデーと、前記吸気通路の内壁面に沿って配置さ
れた円筒状の第１案内部材と、該第１案内部材の外周面
と前記吸気通路の内壁面とで構成され、前記吸気通路の
下流側に延びる円環状の排気ガス導入通路と、を備えて
なるエンジンの吸気装置において、前記第１案内部材に
前記排気ガス導入通路の円周方向の連通を遮断可能な阻
止手段を、前記排気ガス還流通路と前記排気ガス導入通
路とが連通する開口部の側と、前記第１案内部材の中心
軸に対して対称となる他方の側とに設けたことを特徴と
するエンジンの排気還流ガス導入部構造。An exhaust gas recirculation passage for recirculating a part of exhaust gas from an engine into an intake passage, a throttle body for controlling an intake air amount of the intake passage by an opening degree of a throttle valve, and an exhaust passage. A cylindrical first guide member arranged along a wall surface, and an annular exhaust gas introduction formed of an outer peripheral surface of the first guide member and an inner wall surface of the intake passage and extending downstream of the intake passage. And a passage that prevents the first guide member from communicating with the exhaust gas introduction passage in the circumferential direction, the exhaust gas recirculation passage and the exhaust gas introduction passage. The exhaust gas recirculation gas introduction structure of an engine, wherein the exhaust gas recirculation gas introduction structure is provided on the side of the opening communicating with the first guide member and the other side symmetrical with respect to the center axis of the first guide member.
周面の一部を突出させることによって形成されているこ
とを特徴とする請求項１に記載のエンジンの排気還流ガ
ス導入部構造。2. An exhaust gas recirculation gas introduction structure for an engine according to claim 1, wherein said blocking means is formed by projecting a part of a circumferential surface of said first guide member. .
ルバルブによって形成される逆流域よりも長いことを特
徴とする請求項１乃至２に記載のエンジンの排気還流ガ
ス導入部構造。3. The exhaust gas recirculation gas introduction structure for an engine according to claim 1, wherein a length of the first guide member is longer than a reverse flow region formed by the throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000129597A JP4352576B2 (en) | 2000-04-28 | 2000-04-28 | Engine exhaust recirculation gas inlet structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000129597A JP4352576B2 (en) | 2000-04-28 | 2000-04-28 | Engine exhaust recirculation gas inlet structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001304045A true JP2001304045A (en) | 2001-10-31 |
| JP4352576B2 JP4352576B2 (en) | 2009-10-28 |
Family
ID=18638843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000129597A Expired - Fee Related JP4352576B2 (en) | 2000-04-28 | 2000-04-28 | Engine exhaust recirculation gas inlet structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4352576B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011106293A (en) * | 2009-11-12 | 2011-06-02 | Mitsubishi Motors Corp | Exhaust gas recirculation device |
| KR20230102721A (en) * | 2021-12-30 | 2023-07-07 | 주식회사 현대케피코 | A ring to prevent carbon deposition |
-
2000
- 2000-04-28 JP JP2000129597A patent/JP4352576B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011106293A (en) * | 2009-11-12 | 2011-06-02 | Mitsubishi Motors Corp | Exhaust gas recirculation device |
| KR20230102721A (en) * | 2021-12-30 | 2023-07-07 | 주식회사 현대케피코 | A ring to prevent carbon deposition |
| KR102580648B1 (en) | 2021-12-30 | 2023-09-21 | 주식회사 현대케피코 | A ring to prevent carbon deposition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4352576B2 (en) | 2009-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2330278B1 (en) | Air intake manifold | |
| JPWO2006129371A1 (en) | EGR gas mixing device | |
| JP3903942B2 (en) | Intake device for internal combustion engine | |
| US6453888B1 (en) | Engine fuel supply system | |
| JP2004316582A (en) | Intake device for internal combustion engine | |
| WO2004040130A1 (en) | Engine | |
| JP2000054915A (en) | Egr device | |
| JP2001304045A (en) | Exhaust re-circulation gas leading part structure for engine | |
| JP2005351235A (en) | Suction device for engine | |
| JP2005155547A (en) | Fuel injection valve | |
| JP2001304046A (en) | Exhaust re-circulation gas leading part structure for engine | |
| JPH08200023A (en) | Cylinder head structure of internal combustion engine | |
| JP3693904B2 (en) | Injector for engine exhaust purification system | |
| JP3014802B2 (en) | Engine intake structure | |
| JP2001173513A (en) | Intake system of engine and its valve seat | |
| JP2007016657A (en) | Intake device for internal combustion engine | |
| JPH11294266A (en) | Exhaust gas recirculation system | |
| KR102125283B1 (en) | Exhaust structure for diesel engine | |
| JP2007224794A (en) | Fuel injection device | |
| JP2005233052A (en) | Air-fuel mixture supply device in internal combustion engine | |
| JP3903941B2 (en) | Intake device for internal combustion engine | |
| JPH05340326A (en) | Fuel supply device for internal combustion engine | |
| JP2007138899A (en) | Intake passage structure of internal combustion engine | |
| JPH0861188A (en) | Hole type injection nozzle | |
| JP2778384B2 (en) | Fuel injection device for internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20070315 |
|
| TRDD | Decision of grant or rejection written | ||
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090630 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20090707 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20090720 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 4352576 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120807 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130807 Year of fee payment: 4 |
|
| LAPS | Cancellation because of no payment of annual fees |