JPH09195859A - Erg gas supply device for diesel engine - Google Patents
Erg gas supply device for diesel engineInfo
- Publication number
- JPH09195859A JPH09195859A JP8023290A JP2329096A JPH09195859A JP H09195859 A JPH09195859 A JP H09195859A JP 8023290 A JP8023290 A JP 8023290A JP 2329096 A JP2329096 A JP 2329096A JP H09195859 A JPH09195859 A JP H09195859A
- Authority
- JP
- Japan
- Prior art keywords
- gas supply
- egr gas
- intake
- supply port
- intake pipe
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/0276—Throttle and EGR-valve operated together
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)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は，ディーゼルエンジンにおける，
排気再循環ガス（ＥＧＲガス）を吸気管に供給するため
のＥＧＲガス供給装置に関する。TECHNICAL FIELD The present invention relates to a diesel engine,
The present invention relates to an EGR gas supply device for supplying exhaust gas recirculation gas (EGR gas) to an intake pipe.
【０００２】[0002]
【従来技術】従来，ディーゼルエンジンにおいて，ＥＧ
Ｒガスを吸気管に供給するための装置としては，例えば
図５に示すごとき構造のＥＧＲガス供給装置９がある。
ＥＧＲガス供給装置９は，図５に示すごとく，インテー
クマニホールド８１を介してエンジン８２に吸入空気を
導入する吸気管９１と，該吸気管９１内に設けた絞りバ
ルブ９２と，ＥＧＲガス供給口９３を開口させた導入パ
イプ９３０とよりなる。2. Description of the Related Art Conventionally, in diesel engines, EG
As an apparatus for supplying R gas to the intake pipe, there is an EGR gas supply apparatus 9 having a structure as shown in FIG. 5, for example.
As shown in FIG. 5, the EGR gas supply device 9 includes an intake pipe 91 for introducing intake air into the engine 82 via an intake manifold 81, a throttle valve 92 provided in the intake pipe 91, and an EGR gas supply port 93. And an introduction pipe 930 having an opening.
【０００３】絞りバルブ９２は，運転席側のアクセルペ
ダルの動きに連動して開閉し，吸気量を調整する。ま
た，導入パイプ９３０は，図５に示すごとく，ＥＧＲバ
ルブ９５，連結パイプ９６を介して排気系側のエキゾー
ストマニホールド８３に連通している。ＥＧＲバルブ９
５は，例えばＥＧＲガス不要時には連結パイプ９６を閉
止してＥＧＲガス通路を遮断し，ＥＧＲガス供給時には
開いてＥＧＲガス通路を連通させる。The throttle valve 92 opens and closes in conjunction with the movement of the accelerator pedal on the driver's side to adjust the intake air amount. As shown in FIG. 5, the introduction pipe 930 communicates with the exhaust system side exhaust manifold 83 via the EGR valve 95 and the connection pipe 96. EGR valve 9
Reference numeral 5 closes the connecting pipe 96 to block the EGR gas passage when the EGR gas is unnecessary, and opens it to connect the EGR gas passage when the EGR gas is supplied.
【０００４】上記ＥＧＲガス供給装置９によりＥＧＲガ
スを供給するに当たっては，エンジンの運転により，吸
気管９１の内部が吸気流れに伴って負圧となることを利
用する。具体的には，上記排気系側の圧力と吸気管９１
内の圧力との差圧により，導入パイプ９３０からＥＧＲ
ガスを吸い出し，エンジンに供給する。When the EGR gas supply device 9 supplies the EGR gas, the fact that the inside of the intake pipe 91 becomes negative due to the intake flow due to the operation of the engine is utilized. Specifically, the pressure on the exhaust system side and the intake pipe 91
EGR from the introduction pipe 930 due to the pressure difference with the internal pressure
It sucks out gas and supplies it to the engine.
【０００５】[0005]
【解決しようとする課題】しかしながら，上記従来のＥ
ＧＲガス供給装置９においては，次の問題がある。即
ち，エンジンの低回転時，軽負荷運転時等には，上記吸
気負圧の発生が低いため，ＥＧＲガスの十分な供給量を
確保することが困難である。また，上記絞りバルブ９２
を急激に開閉した場合には，絞りバルブ９２の下流側の
吸気流れが乱れると共に圧力が大きく変動する。特に，
絞りバルブ９２を急激に開いた場合には，その下流側，
即ちＥＧＲガス供給口９３近傍の圧力が急激に高くな
る。そのため，ＥＧＲガスの供給量が大幅に減少してし
まう。[Problems to be Solved] However, the above-mentioned conventional E
The GR gas supply device 9 has the following problems. That is, it is difficult to secure a sufficient supply amount of EGR gas because the intake negative pressure is low when the engine is running at a low speed or is operated under a light load. Further, the throttle valve 92
When is rapidly opened and closed, the intake flow on the downstream side of the throttle valve 92 is disturbed and the pressure is greatly changed. Especially,
When the throttle valve 92 is suddenly opened, its downstream side,
That is, the pressure near the EGR gas supply port 93 rapidly increases. Therefore, the supply amount of EGR gas is significantly reduced.
【０００６】この対策として，例えば実開平２−１１９
９６３号公報に示されているごとく，吸気管内部に吸気
流れを偏向する偏向部材を配置して，いわゆるベンチュ
リ部を形成し，ＥＧＲガス供給口の位置の吸気速度を速
めることにより，ＥＧＲガスの供給量を確保することが
提案されている。しかしながら，この手段によれば，絞
りバルブの開度が小さい時には絞りバルブ直後の吸気の
流れに乱れが生じるため，ＥＧＲガス供給口部分を通過
する吸気も乱れ，ＥＧＲガスの供給量が変動する。As a countermeasure against this, for example, actual Kaihei 2-119
As shown in Japanese Patent Publication No. 963, a so-called venturi portion is formed by arranging a deflecting member for deflecting the intake air flow inside the intake pipe, and the intake speed at the position of the EGR gas supply port is increased to increase the EGR gas It is proposed to secure the supply. However, according to this means, when the opening of the throttle valve is small, the flow of the intake air immediately after the throttle valve is disturbed, so that the intake air passing through the EGR gas supply port is also disturbed and the supply amount of the EGR gas varies.
【０００７】本発明は，かかる従来の問題点に鑑みてな
されたもので，絞りバルブの開閉状態に大きく左右され
ることなく十分な量のＥＧＲガスを供給することができ
る，ディーゼルエンジン用ＥＧＲガス供給装置を提供し
ようとするものである。The present invention has been made in view of the above conventional problems, and is capable of supplying a sufficient amount of EGR gas without being largely influenced by the opening / closing state of the throttle valve. It is intended to provide a supply device.
【０００８】[0008]
【課題の解決手段】請求項１の発明は，ディーゼルエン
ジンに吸入空気を導入するための吸気管と，該吸気管内
に設けた吸気量調整用の絞りバルブと，上記吸気管にＥ
ＧＲガス供給口を開口させた導入パイプとよりなり，上
記絞りバルブと上記ＥＧＲガス供給口との間には，吸入
空気の空気流れを上記ＥＧＲガス供給口側に導く第１流
路と上記吸気流れを上記ＥＧＲガス供給口と反対側に導
く第２流路とに区分するガイド板を，上記吸気管内に配
設してなり，また，上記絞りバルブは，上記吸気管内に
おいて回動する回動軸と弁体とよりなり，かつ該弁体は
上記第１流路の方向に回動するように配設してあること
を特徴とするディーゼルエンジン用のＥＧＲガス供給装
置にある。According to a first aspect of the present invention, an intake pipe for introducing intake air into a diesel engine, a throttle valve for adjusting an intake amount provided in the intake pipe, and an E pipe for the intake pipe are provided.
A first flow path, which is composed of an introduction pipe having a GR gas supply port opened, and which introduces an air flow of intake air to the EGR gas supply port side between the throttle valve and the EGR gas supply port. A guide plate that divides a flow into a second flow path that guides the EGR gas supply port to the opposite side is disposed in the intake pipe, and the throttle valve rotates in the intake pipe. The EGR gas supply device for a diesel engine is characterized by comprising a shaft and a valve body, and the valve body is arranged so as to rotate in the direction of the first flow path.
【０００９】本発明において最も注目すべきことは，上
記絞りバルブと上記ＥＧＲガス供給口との間には，上記
ガイド板により上記第１流路と第２流路とを形成し，ま
た，上記絞りバルブの弁体は上記第１流路の方向に回動
するように配設していることである。What is most noticeable in the present invention is that the first flow path and the second flow path are formed between the throttle valve and the EGR gas supply port by the guide plate, and The valve body of the throttle valve is arranged so as to rotate in the direction of the first flow path.
【００１０】次に，本発明の作用につき説明する。本発
明のディーゼルエンジン用ＥＧＲガス供給装置において
は，上記吸気管内の上記絞りバルブの下流側に上記ガイ
ド板を設けてある。そして，このガイド板を境にして上
記第１流路と第２流路とを形成している。また，上記ガ
イド板の上流側に位置する上記絞りバルブは，その弁体
を上記第１流路の方向に回動するように構成してある。Next, the operation of the present invention will be described. In the EGR gas supply device for a diesel engine of the present invention, the guide plate is provided in the intake pipe downstream of the throttle valve. The first flow path and the second flow path are formed with the guide plate as a boundary. Further, the throttle valve located upstream of the guide plate is configured to rotate its valve body in the direction of the first flow path.
【００１１】そのため，上記絞りバルブを少し開いた状
態においては，その弁体は，上記第１流路に向けて傾斜
した状態となる（図１）。そして，吸入された空気は，
弁体の傾斜方向に沿って第１流路側に集められる。集め
られた空気は，上記ガイド板の存在により第２流路側へ
分散することなく，高速で第１流路を通過し，ＥＧＲガ
ス供給口部を負圧状態にする。Therefore, when the throttle valve is slightly open, the valve body is inclined toward the first flow path (FIG. 1). And the inhaled air is
Collected on the first flow path side along the direction of inclination of the valve body. The collected air passes through the first flow path at high speed without dispersing to the second flow path side due to the existence of the guide plate, and makes the EGR gas supply port part in a negative pressure state.
【００１２】それ故，バルブ開度が小さく吸気量が少な
い場合であっても，ＥＧＲガス供給口が位置する部分に
おいては，吸気速度が高速になると共に安定した吸気負
圧状態が得られる。そのため，ＧＲガスの供給量の安定
化を図ることができる。Therefore, even when the valve opening is small and the intake amount is small, the intake speed becomes high and a stable intake negative pressure state is obtained in the portion where the EGR gas supply port is located. Therefore, the supply amount of GR gas can be stabilized.
【００１３】次に，請求項２の発明のように，上記絞り
バルブの回動軸は，上記吸気管の断面中心位置よりも上
記第２流路側に偏心して配置されており，上記弁体は上
記第１流路側が上記第２流路側よりも長いことが好まし
い（図１，図４）。これにより，上記弁体を回動軸を中
心に回動させた場合には，吸気管内に生じる吸気通路の
開口断面積は弁体の第１流路側が第２流路側よりも大き
くなり，さらに多くの空気を第１流路側に集中させるこ
とができる。Next, according to a second aspect of the present invention, the rotary shaft of the throttle valve is arranged eccentrically toward the second flow path side with respect to the center position of the cross section of the intake pipe, and the valve element is It is preferable that the first flow path side is longer than the second flow path side (FIGS. 1 and 4). As a result, when the valve body is rotated about the rotation axis, the opening cross-sectional area of the intake passage formed in the intake pipe becomes larger on the first flow path side of the valve body than on the second flow path side. A large amount of air can be concentrated on the first flow path side.
【００１４】また，請求項３の発明のように，上記ガイ
ド板は，上記第１流路側が流線型状を有していることが
好ましい（図１）。ここに流線型状とは，上流側におい
ては，第１流路における吸気管の内壁との間隙が狭く，
一方下流側においては，第１流路における吸気管の内壁
との間隙が上流よりも広くなっている形状をいう。これ
により，ガイド板を設けたことによる吸気流れの渦巻き
現象等の発生を防止し，高速でスムーズな吸気流れを維
持でき，ＥＧＲガスをさらに確実に供給することができ
る。Further, as in the invention of claim 3, it is preferable that the guide plate has a streamline shape on the side of the first flow path (FIG. 1). On the upstream side, the streamline shape means that the gap with the inner wall of the intake pipe in the first flow path is narrow,
On the other hand, on the downstream side, it means a shape in which the gap between the inner wall of the intake pipe in the first flow path is wider than that in the upstream side. As a result, it is possible to prevent the occurrence of a swirling phenomenon of the intake flow due to the provision of the guide plate, maintain a high-speed and smooth intake flow, and supply the EGR gas more reliably.
【００１５】また，請求項４の発明のように，上記ガイ
ド板の前端位置は上記ＥＧＲガス供給口の前端位置より
も上流側に，また上記ガイド板の後端の位置は上記ＥＧ
Ｒガス供給口の後端の位置まで延設されていることが好
ましい。これにより，上記ガイド板により形成された第
１流路を通過した空気は，確実にＥＧＲガス供給口前を
通過し，安定した吸気負圧状態を維持することができ
る。Further, as in the invention of claim 4, the front end position of the guide plate is upstream of the front end position of the EGR gas supply port, and the rear end position of the guide plate is the EG position.
It is preferable to extend to the position of the rear end of the R gas supply port. As a result, the air that has passed through the first flow path formed by the guide plate can reliably pass in front of the EGR gas supply port and maintain a stable intake negative pressure state.
【００１６】[0016]
実施形態例 本発明の実施形態例にかかるディーゼルエンジン用ＥＧ
Ｒガス供給装置につき，図１〜図４を用いて説明する。
本例のディーゼルエンジン用ＥＧＲガス供給装置１は，
図１〜図４に示すごとく，ディーゼルエンジンに吸入空
気を導入するための吸気管１０と，吸気管１０内に設け
た吸気量調整用の絞りバルブ２と，吸気管１０にＥＧＲ
ガス供給口３を開口させた導入パイプ３０とよりなる。Embodiment Example EG for a diesel engine according to an embodiment example of the present invention
The R gas supply device will be described with reference to FIGS.
The EGR gas supply device 1 for a diesel engine of this example is
As shown in FIGS. 1 to 4, an intake pipe 10 for introducing intake air into a diesel engine, a throttle valve 2 for adjusting the intake amount provided in the intake pipe 10, and an EGR in the intake pipe 10.
The introduction pipe 30 has the gas supply port 3 opened.
【００１７】絞りバルブ２とＥＧＲガス供給口３との間
には，吸入空気の空気流れをＥＧＲガス供給口３側に導
く第１流路１１と上記吸気流れをＥＧＲガス供給口３と
反対側に導く第２流路１２とに区分するガイド板１５
を，吸気管１０内に配設してなる。また，絞りバルブ２
は，吸気管１０内において回動する回動軸２１と弁体２
２とよりなり，かつ弁体２２は第１流路１１の方向に回
動するように配設してある。Between the throttle valve 2 and the EGR gas supply port 3, there is provided a first flow path 11 for guiding the air flow of the intake air to the EGR gas supply port 3 side and the intake air flow opposite to the EGR gas supply port 3. Guide plate 15 that is divided into the second flow path 12 that leads to
Are arranged in the intake pipe 10. In addition, throttle valve 2
Is a rotary shaft 21 and a valve body 2 that rotate in the intake pipe 10.
2, and the valve body 22 is arranged so as to rotate in the direction of the first flow path 11.
【００１８】以下，これを詳述する。上記吸気管１０
は，図３に示すごとく，下流側に連結されたインテーク
マニホールド８１を介してエンジン８２に通じている。
また，吸気管１０にＥＧＲガス供給口３を開口した導入
パイプ３０は，ＥＧＲバルブ９５，連結パイプ９６を介
して排気側のエキゾーストパイプ８３に連通している。This will be described in detail below. The intake pipe 10
As shown in FIG. 3, the engine is connected to the engine 82 via an intake manifold 81 connected to the downstream side.
Further, the introduction pipe 30 in which the EGR gas supply port 3 is opened in the intake pipe 10 communicates with the exhaust side exhaust pipe 83 via the EGR valve 95 and the connecting pipe 96.
【００１９】ＥＧＲバルブ９５は，ＥＧＲガスの流量を
調整するものであって，例えばＥＧＲガス供給をストッ
プする場合には連結パイプ９６を閉止してＥＧＲガス通
路を遮断し，ＥＧＲガス供給時には開いてＥＧＲガス通
路を開放する。The EGR valve 95 is for adjusting the flow rate of EGR gas. For example, when the EGR gas supply is stopped, the connecting pipe 96 is closed to cut off the EGR gas passage, and it is opened when the EGR gas is supplied. Open the EGR gas passage.
【００２０】また，図１，図４に示すごとく，吸気管１
０におけるＥＧＲガス供給口３の上流側に設けた絞りバ
ルブ２は，回転軸２１と，これにボルト２３（図４）に
より固定した弁体２２とよりなる。そして，絞りバルブ
２の回動軸２１は，図１に示すごとく，吸気管１０の断
面中心位置Ｓ１よりも第２流路側の位置Ｓ２に偏心して
配置されている。即ち，図４に示すごとく，弁体２２は
第１流路１１側の長さＬ１が第２流路１２側の長さＬ２
よりも長い。As shown in FIGS. 1 and 4, the intake pipe 1
The throttle valve 2 provided on the upstream side of the EGR gas supply port 3 at 0 comprises a rotary shaft 21 and a valve body 22 fixed to the rotary shaft 21 by a bolt 23 (FIG. 4). As shown in FIG. 1, the rotary shaft 21 of the throttle valve 2 is eccentrically arranged at a position S2 closer to the second flow path than the cross-sectional center position S1 of the intake pipe 10. That is, as shown in FIG. 4, the valve body 22 has a length L1 on the side of the first flow passage 11 and a length L2 on the side of the second flow passage 12 respectively.
Longer than.
【００２１】また，図１に示すごとく，絞りバルブ２と
ＥＧＲガス供給口３との間に設けたガイド板１５は，第
１流路１１側が流線型状を有している。そして，ガイド
板１５の前端１５１の位置はＥＧＲガス供給口３の前端
３１位置よりも上流側に，またガイド板１５の後端１５
２の位置はＥＧＲガス供給口３の後端３２の位置まで延
設されている。As shown in FIG. 1, the guide plate 15 provided between the throttle valve 2 and the EGR gas supply port 3 has a streamlined shape on the first flow path 11 side. The position of the front end 151 of the guide plate 15 is upstream of the position of the front end 31 of the EGR gas supply port 3, and the rear end 15 of the guide plate 15 is
The position 2 extends to the position of the rear end 32 of the EGR gas supply port 3.
【００２２】また，図２に示すごとく，ガイド板１５
は，吸気管１０内を，第１流路１１と第２流路１２とを
非導通状態に区画している。即ち，ガイド板１５は，吸
気管１０内を貫通して両側の内壁に連結され，吸気通路
を完全に二分しており，その一方に第１流路１１，他方
に第２流路１２を形成している。Further, as shown in FIG. 2, the guide plate 15
Divides the inside of the intake pipe 10 so that the first flow passage 11 and the second flow passage 12 are non-conductive. That is, the guide plate 15 penetrates the inside of the intake pipe 10 and is connected to the inner walls on both sides to completely divide the intake passage into two parts, one of which forms the first flow passage 11 and the other of which forms the second flow passage 12. doing.
【００２３】次に，本例の作用につき説明する。本例の
ディーゼルエンジン用ＥＧＲガス供給装置１において
は，上記のごとく，ガイド板１５を境にして第１流路１
１と第２流路１２とを形成している。また，ガイド板１
５の上流側に位置する絞りバルブ２は，その弁体２２を
第１流路１１の方向に回動するように構成してある。そ
のため，図１に示すごとく，絞りバルブ２を少し開いた
状態においては，その弁体２２は，第１流路１１に向け
て傾斜した状態となる。Next, the operation of this embodiment will be described. In the EGR gas supply device 1 for the diesel engine of this example, as described above, the first flow path 1 is separated by the guide plate 15 as a boundary.
1 and the second flow path 12 are formed. Also, the guide plate 1
The throttle valve 2 located on the upstream side of 5 is configured so that its valve body 22 is rotated in the direction of the first flow path 11. Therefore, as shown in FIG. 1, when the throttle valve 2 is slightly opened, the valve body 22 is inclined toward the first flow path 11.
【００２４】一方，ガイド板１５の前端１５１の位置は
ＥＧＲガス供給口３の前端３１の位置よりも上流側に，
またガイド板１５の後端１５２の位置はＥＧＲガス供給
口３の後端３２の位置まで延設されている。そのため，
図１に示すごとく，上記弁体２２とガイド板１５は，Ｅ
ＧＲガス供給口３まで連続的に設けた通路壁のように機
能し，吸気管１０に導入された空気を確実に第１流路１
１側に集中させる。On the other hand, the position of the front end 151 of the guide plate 15 is upstream of the position of the front end 31 of the EGR gas supply port 3,
The position of the rear end 152 of the guide plate 15 extends to the position of the rear end 32 of the EGR gas supply port 3. for that reason,
As shown in FIG. 1, the valve body 22 and the guide plate 15 are
It functions like a passage wall that is continuously provided up to the GR gas supply port 3, and ensures that the air introduced into the intake pipe 10 is first flow path 1
Concentrate on side 1.
【００２５】また，第１流路１１に集められて通過する
空気は，ガイド板１５の存在により第２流路１２側へ分
散することなく，高速で第１流路１１を通過する。それ
故，バルブ開度が小さく吸気量が少ない場合であって
も，ＥＧＲガス供給口３が位置する部分においては，高
速で通過する吸入空気によって安定した吸気負圧状態が
得られ，ＥＧＲガスの供給量の安定化を図ることができ
る。Further, the air collected and passing through the first flow passage 11 passes through the first flow passage 11 at high speed without being dispersed to the second flow passage 12 side due to the existence of the guide plate 15. Therefore, even when the valve opening is small and the intake amount is small, a stable intake negative pressure state is obtained by the intake air passing at high speed in the portion where the EGR gas supply port 3 is located, and the EGR gas It is possible to stabilize the supply amount.
【００２６】また，本例においては，絞りバルブ２の回
動軸２１は，吸気管１０の断面中心位置Ｓ１よりも第２
流路１２側の位置Ｓ２に偏心して配置されており，弁体
２２は第１流路１１側の長さＬ１が第２流路１２側の長
さＬ２よりも長い。そのため，弁体２２を回動軸を中心
に一定角度回動させた場合には，吸気管１０に生じる吸
気通路の開口断面積は弁体２２の第１流路１１側が第２
流路１２側よりも大きくなる。それ故，さらに多くの空
気を第１流路１１側に集中させることができ，上記効果
が一層向上する。Further, in the present embodiment, the rotary shaft 21 of the throttle valve 2 is located at the second position from the center position S1 of the cross section of the intake pipe 10.
The valve body 22 is arranged eccentrically at the position S2 on the flow channel 12 side, and the valve body 22 has a length L1 on the first flow channel 11 side longer than a length L2 on the second flow channel 12 side. Therefore, when the valve body 22 is rotated by a certain angle around the rotation axis, the opening cross-sectional area of the intake passage formed in the intake pipe 10 is the second passage on the side of the first passage 11 of the valve body 22.
It becomes larger than the flow path 12 side. Therefore, a larger amount of air can be concentrated on the first flow path 11 side, and the above effect is further improved.
【００２７】また，ガイド板１５は，第１流路１１側が
流線型状を有している。そのため，上流側においては第
１流路１１における吸気管１０の内壁との間隙が狭く，
一方下流側においては第１流路１１における吸気管１０
の内壁との間隙が上流側よりも広い。それ故，ガイド板
１５を設けたことによって，吸気流れの渦巻き現象等を
発生させるというような弊害が出ることもない。The guide plate 15 has a streamlined shape on the first flow path 11 side. Therefore, on the upstream side, the gap between the first passage 11 and the inner wall of the intake pipe 10 is narrow,
On the other hand, on the downstream side, the intake pipe 10 in the first flow path 11
The gap with the inner wall is wider than the upstream side. Therefore, the provision of the guide plate 15 does not cause any adverse effect such as generation of a swirling phenomenon of the intake air flow.
【００２８】[0028]
【発明の効果】上述のごとく，本発明によれば，絞りバ
ルブの開閉状態に大きく左右されることなく十分な量の
ＥＧＲガスを供給することができる，ディーゼルエンジ
ン用のＥＧＲガス供給装置を得ることができる。As described above, according to the present invention, an EGR gas supply device for a diesel engine is provided which can supply a sufficient amount of EGR gas without being greatly affected by the open / close state of the throttle valve. be able to.
【図１】実施形態例のＥＧＲガス供給装置の構成を示す
説明図。FIG. 1 is an explanatory diagram showing a configuration of an EGR gas supply device according to an embodiment.
【図２】図１のＡ−Ａ線矢視断面図。FIG. 2 is a sectional view taken along line AA of FIG. 1;
【図３】実施形態例のＥＧＲガス供給装置を備えたエン
ジンを示す説明図。FIG. 3 is an explanatory diagram showing an engine including an EGR gas supply device according to an embodiment.
【図４】実施形態例における，絞りバルブの正面図。FIG. 4 is a front view of the throttle valve according to the embodiment.
【図５】従来例のＥＧＲガス供給装置を備えたエンジン
を示す説明図。FIG. 5 is an explanatory diagram showing an engine including a conventional EGR gas supply device.
１．．．ＥＧＲガス供給装置， １１．．．第１流路， １２．．．第２流路， １５．．．ガイド板， ２．．．絞りバルブ， ２１．．．回転軸， ２２．．．弁体， ３．．．ＥＧＲガス供給口， ３０．．．導入パイプ， ９５．．．ＥＧＲバルブ， 1. . . EGR gas supply device, 11. . . 1st flow path, 12. . . Second channel, 15. . . Guide plate, 2. . . Throttle valve, 21. . . Rotating shaft, 22. . . Valve body, 3. . . EGR gas supply port, 30. . . Introduction pipe, 95. . . EGR valve,
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０２Ｍ 35/10 ３１１ Ｆ０２Ｍ 35/10 ３０１Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location F02M 35/10 311 F02M 35/10 301D
Claims (4)
るための吸気管と，該吸気管内に設けた吸気量調整用の
絞りバルブと，上記吸気管にＥＧＲガス供給口を開口さ
せた導入パイプとよりなり，上記絞りバルブと上記ＥＧ
Ｒガス供給口との間には，吸入空気の空気流れを上記Ｅ
ＧＲガス供給口側に導く第１流路と上記吸気流れを上記
ＥＧＲガス供給口と反対側に導く第２流路とに区分する
ガイド板を，上記吸気管内に配設してなり，また，上記
絞りバルブは，上記吸気管内において回動する回動軸と
弁体とよりなり，かつ該弁体は上記第１流路の方向に回
動するように配設してあることを特徴とするディーゼル
エンジン用のＥＧＲガス供給装置。1. An intake pipe for introducing intake air into a diesel engine, a throttle valve for adjusting an intake amount provided in the intake pipe, and an introduction pipe having an EGR gas supply port opened in the intake pipe. And the throttle valve and the EG
The air flow of the intake air between the R gas supply port and the above E
A guide plate for partitioning the first flow path leading to the GR gas supply port side and the second flow path guiding the intake flow to the opposite side of the EGR gas supply port is arranged in the intake pipe, and The throttle valve is composed of a rotating shaft that rotates in the intake pipe and a valve body, and the valve body is arranged so as to rotate in the direction of the first flow path. EGR gas supply device for diesel engines.
動軸は，上記吸気管の断面中心位置よりも上記第２流路
側に偏心して配置されており，上記弁体は上記第１流路
側が上記第２流路側よりも長いことを特徴とするディー
ゼルエンジン用のＥＧＲガス供給装置。2. The rotating shaft of the throttle valve according to claim 1, wherein the rotary shaft is arranged eccentrically to the second flow passage side with respect to the center position of the cross section of the intake pipe, and the valve element is the first flow passage. An EGR gas supply device for a diesel engine, characterized in that the side is longer than the second flow path side.
は，上記第１流路側が流線型状を有していることを特徴
とするディーゼルエンジン用のＥＧＲガス供給装置。3. The EGR gas supply device for a diesel engine according to claim 1 or 2, wherein the guide plate has a streamlined shape on the first flow path side.
上記ガイド板の前端位置は上記ＥＧＲガス供給口の前端
位置よりも上流側に，また上記ガイド板の後端の位置は
上記ＥＧＲガス供給口の後端の位置まで延設されている
ことを特徴とするディーゼルエンジン用のＥＧＲガス供
給装置。4. The method according to claim 1, wherein:
The front end position of the guide plate extends upstream of the front end position of the EGR gas supply port, and the rear end position of the guide plate extends to the rear end position of the EGR gas supply port. EGR gas supply device for diesel engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8023290A JPH09195859A (en) | 1996-01-16 | 1996-01-16 | Erg gas supply device for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8023290A JPH09195859A (en) | 1996-01-16 | 1996-01-16 | Erg gas supply device for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09195859A true JPH09195859A (en) | 1997-07-29 |
Family
ID=12106481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8023290A Pending JPH09195859A (en) | 1996-01-16 | 1996-01-16 | Erg gas supply device for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09195859A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2847947A1 (en) * | 2002-11-29 | 2004-06-04 | Renault Sa | Motor vehicle i.c. engine exhaust gas recirculation system has flow breaker baffle in entry zone of inlet manifold |
| CN102052204A (en) * | 2009-11-02 | 2011-05-11 | 万国引擎知识产权有限责任公司 | Three-way throttle valve |
| FR2952311A1 (en) * | 2009-11-09 | 2011-05-13 | Renault Sa | Device for mixing intake air flow with recirculated exhaust gas flow in internal combustion engine of e.g. diesel type motor vehicle, has mixing plate integrated to air duct and comprising downstream edge located upstream of axis of pipe |
| JP2012246933A (en) * | 2012-09-20 | 2012-12-13 | Inoac Corp | Intake duct for vehicle |
| DE102004047990B4 (en) * | 2003-10-03 | 2014-01-02 | General Motors Corp. (N.D.Ges.D. Staates Delaware) | Air intake arrangement for an internal combustion engine |
| US8739752B2 (en) | 2008-04-10 | 2014-06-03 | Inoac Corporation | Intake duct for vehicles |
| KR101423782B1 (en) * | 2008-12-05 | 2014-07-28 | 현대자동차주식회사 | Pipe for distributing recirculation exhaust gas |
| GB2523378A (en) * | 2014-02-24 | 2015-08-26 | Perkins Engines Co Ltd | Exhaust gas mixing system |
| JP2017089527A (en) * | 2015-11-12 | 2017-05-25 | アイシン精機株式会社 | Intake manifold |
-
1996
- 1996-01-16 JP JP8023290A patent/JPH09195859A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2847947A1 (en) * | 2002-11-29 | 2004-06-04 | Renault Sa | Motor vehicle i.c. engine exhaust gas recirculation system has flow breaker baffle in entry zone of inlet manifold |
| DE102004047990B4 (en) * | 2003-10-03 | 2014-01-02 | General Motors Corp. (N.D.Ges.D. Staates Delaware) | Air intake arrangement for an internal combustion engine |
| US8739752B2 (en) | 2008-04-10 | 2014-06-03 | Inoac Corporation | Intake duct for vehicles |
| KR101423782B1 (en) * | 2008-12-05 | 2014-07-28 | 현대자동차주식회사 | Pipe for distributing recirculation exhaust gas |
| CN102052204A (en) * | 2009-11-02 | 2011-05-11 | 万国引擎知识产权有限责任公司 | Three-way throttle valve |
| FR2952311A1 (en) * | 2009-11-09 | 2011-05-13 | Renault Sa | Device for mixing intake air flow with recirculated exhaust gas flow in internal combustion engine of e.g. diesel type motor vehicle, has mixing plate integrated to air duct and comprising downstream edge located upstream of axis of pipe |
| JP2012246933A (en) * | 2012-09-20 | 2012-12-13 | Inoac Corp | Intake duct for vehicle |
| GB2523378A (en) * | 2014-02-24 | 2015-08-26 | Perkins Engines Co Ltd | Exhaust gas mixing system |
| GB2523378B (en) * | 2014-02-24 | 2016-01-20 | Perkins Engines Co Ltd | Exhaust gas mixing system |
| US9695779B2 (en) | 2014-02-24 | 2017-07-04 | Perkins Engines Company Limited | Exhaust gas mixing system |
| JP2017089527A (en) * | 2015-11-12 | 2017-05-25 | アイシン精機株式会社 | Intake manifold |
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