JPS6224037Y2 - - Google Patents
Info
- Publication number
- JPS6224037Y2 JPS6224037Y2 JP1981076055U JP7605581U JPS6224037Y2 JP S6224037 Y2 JPS6224037 Y2 JP S6224037Y2 JP 1981076055 U JP1981076055 U JP 1981076055U JP 7605581 U JP7605581 U JP 7605581U JP S6224037 Y2 JPS6224037 Y2 JP S6224037Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- control valve
- passage
- gas recirculation
- negative pressure
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 description 24
- 239000000498 cooling water Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Description
【考案の詳細な説明】
本考案は、エンジンの排気ガス還流装置に関す
るものである。[Detailed Description of the Invention] The present invention relates to an exhaust gas recirculation device for an engine.
従来、排気ガス還流量を制御する還流制御弁の
排気ガス熱による熱害を防止するため、実開昭51
−85120に示すように還流制御弁本体に空気また
は冷却水を通すジヤケツトを一体的に形成して空
気または冷却水により還流制御弁を冷却するもの
が提案されている。 Conventionally, in order to prevent heat damage caused by exhaust gas heat in the recirculation control valve that controls the amount of exhaust gas recirculation,
As shown in No. 85120, it has been proposed that a jacket for passing air or cooling water is integrally formed in the reflux control valve body so that the reflux control valve is cooled by the air or cooling water.
しかしながら、上記従来のものにおいては、還
流制御弁本体にジヤケツトを一体的に形成するた
め、還流制御弁が大型となり、また、ジヤケツト
に空気または冷却水を導く通路を設ける必容があ
り、構造が複雑となる問題があつた。 However, in the above-mentioned conventional type, the jacket is integrally formed with the reflux control valve body, so the reflux control valve becomes large, and it is necessary to provide a passage in the jacket for guiding air or cooling water, resulting in a structure that is complicated. A complicated problem arose.
本考案は、上記問題に鑑み、還流制御弁を大型
にすることなく簡単な構造で還流制御弁および還
流制御弁本体の熱害を防止するエンジンの排気ガ
ス還流装置を提供するものである。 In view of the above problems, the present invention provides an engine exhaust gas recirculation device that prevents heat damage to the recirculation control valve and the recirculation control valve body with a simple structure without increasing the size of the recirculation control valve.
以下に、本考案の実施例を図面に基づいて詳細
に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図に示す第１実施例において、１はエンジ
ンの排気ガスの一部を吸気系に還流する排気ガス
還流通路で、一端が排気通路（図示せず）に連通
し、他端が吸気通路２の集合部２ａに連通してい
る。そして、該排気ガス還流通路１は吸気マニホ
ールド３と一体的に形成された第１通路１ａと還
流制御弁４を備えた還流制御弁本体５に形成され
た第２通路１ｂとにより構成されている。６は還
流制御弁本体５の第２通路１ｂと吸気マニホール
ド３の第１通路１ａとの接続部７に介挿されたア
ルミ等の熱伝達性のよい金属製のガスケツトで、
第２通路１ｂに介装した還流制御弁４の弁体４ａ
上流の排気ガス還流通路１内に所定量突出する突
出部としてオリフイス６ａを形成している。 In the first embodiment shown in FIG. 1, reference numeral 1 denotes an exhaust gas recirculation passage that recirculates part of the engine exhaust gas to the intake system, one end of which communicates with an exhaust passage (not shown), and the other end of which is connected to the intake passage. It communicates with the gathering part 2a of No. 2. The exhaust gas recirculation passage 1 is composed of a first passage 1a formed integrally with an intake manifold 3 and a second passage 1b formed in a recirculation control valve main body 5 provided with a recirculation control valve 4. . Reference numeral 6 denotes a gasket made of a metal with good heat transfer properties such as aluminum, which is inserted in the connection part 7 between the second passage 1b of the reflux control valve main body 5 and the first passage 1a of the intake manifold 3.
Valve body 4a of the reflux control valve 4 interposed in the second passage 1b
An orifice 6a is formed as a protrusion that protrudes a predetermined amount into the upstream exhaust gas recirculation passage 1.
上記還流制御弁４は負圧作動式の弁で、上記還
流制御弁本体５と一体的に形成された下部ケース
５ａに上部ケース４ｂによつてかしめ装着された
ダイヤフラム４Ｃと、該ダイヤフラム４Ｃによつ
て区画形成された負圧室４ｄと大気室４ｅと、負
圧室４ｄに縮装されたスプリング４ｆと、上記ダ
イヤフラム４Ｃに弁軸４ｇを介して固定された弁
体４ａとにより構成されており、上記負圧室４ｄ
に作用する負圧によつて第２通路１ｂ内の排気ガ
ス還流量を制御する。 The reflux control valve 4 is a negative pressure operated valve, and includes a diaphragm 4C which is caulked to a lower case 5a formed integrally with the reflux control valve main body 5 by an upper case 4b, It is composed of a negative pressure chamber 4d and an atmospheric chamber 4e which are partitioned together, a spring 4f compressed into the negative pressure chamber 4d, and a valve body 4a fixed to the diaphragm 4C via a valve shaft 4g. , the negative pressure chamber 4d
The amount of exhaust gas recirculated within the second passage 1b is controlled by the negative pressure acting on the second passage 1b.
８は還流制御弁４の負圧室４ｄと、吸気通路２
の一次吸気通路９に介装した一次絞弁１０の全閉
時にその直上流に位置する一次吸気通路９とを連
通する負圧通路で、該通路８には還流制御弁４の
負圧室４ｄに作用する負圧を制御する負圧調整弁
１１が介装されている。 8 is the negative pressure chamber 4d of the recirculation control valve 4 and the intake passage 2
A negative pressure passage that communicates with the primary intake passage 9 located immediately upstream when the primary throttle valve 10 interposed in the primary intake passage 9 is fully closed. A negative pressure regulating valve 11 is interposed to control the negative pressure acting on the engine.
上記負圧調整弁１１は大気室１１ａと圧力室１
１ｂとを区画形成するダイヤフラム１１Ｃと、該
ダイヤフラム１１Ｃに固定され、かつ負圧通路８
から分岐した負圧リーク孔８ａを開閉制御する弁
体１１ｄと、上記大気室１１ａに縮装したスプリ
ング１１ｅとにより構成され、圧力室１１ｂは圧
力通路１２を介して還流制御弁４の弁体４ａとガ
スケツト６のオリフイス６ａとによつて区画形成
された定圧室１３に接続されている。 The negative pressure regulating valve 11 has an atmospheric chamber 11a and a pressure chamber 1.
1b, and a negative pressure passage 8 fixed to the diaphragm 11C.
The pressure chamber 11b is composed of a valve body 11d that controls the opening and closing of the negative pressure leak hole 8a branched from the atmospheric chamber 11a, and a spring 11e that is compressed in the atmospheric chamber 11a. and an orifice 6a of the gasket 6.
前述したガスケツト６は還流制御弁本体５をボ
ルト（図示せず）等で吸気マニホールド３に組み
付ける際に還流制御弁本体５と吸気マニホールド
３との間に介挿され、その際、ガスケツト６の外
縁全周には大気中に所定量突出する突出部６ｂが
形成されている。 The aforementioned gasket 6 is inserted between the reflux control valve body 5 and the intake manifold 3 when the reflux control valve body 5 is assembled to the intake manifold 3 with bolts (not shown), etc., and at that time, the outer edge of the gasket 6 A protrusion 6b that protrudes a predetermined amount into the atmosphere is formed around the entire circumference.
なお、図中に示す１４は吸気通路２の二次吸気
通路１５に介装した二次絞弁である。 Note that 14 shown in the figure is a secondary throttle valve interposed in the secondary intake passage 15 of the intake passage 2.
上記構成において、エンジンを始動して一次絞
弁１０を開作動すると負圧通路８に一次絞弁１０
下流の吸気負圧が作用し、かつ排気ガス還流通路
１に排気ガスが流入する。この時、定圧室１３の
圧力が負圧調整弁１１の圧力室１１ｂに作用し、
定圧室１３の圧力が所定値以上の時、ダイヤフラ
ム１１Ｃがスプリング１１ｅのスプリング力に抗
して上動し、弁体１１ｄが負圧リーク孔８ａを閉
作動する。これによつて負圧通路８内の吸気負圧
の大気リーク量が減少し、負圧室４ｄの負圧が増
加して弁体４ａが開作動する。一方弁体４ａが開
き定圧室１３の圧力が所定値以上になると圧力室
１１ｂの圧力もそれに対応して低下し、弁体１１
ｄはスプリング１１ｅにより下動して負圧リーク
孔８ａを開き負圧通路８内の吸気負圧の大気リー
ク量が増加して負圧室４ｄ内の負圧を低下させ、
弁体４ａはスプリング４ｆにより閉作動される。
これらの繰り返しによつて定圧室１３の圧力を所
定値（ほぼ大気圧）に制御して吸入空気量に対し
て排気ガス還流率を一定にする。 In the above configuration, when the engine is started and the primary throttle valve 10 is opened, the primary throttle valve 10 is connected to the negative pressure passage 8.
The downstream intake negative pressure acts, and exhaust gas flows into the exhaust gas recirculation passage 1. At this time, the pressure in the constant pressure chamber 13 acts on the pressure chamber 11b of the negative pressure regulating valve 11,
When the pressure in the constant pressure chamber 13 is above a predetermined value, the diaphragm 11C moves upward against the spring force of the spring 11e, and the valve body 11d closes the negative pressure leak hole 8a. This reduces the amount of intake negative pressure in the negative pressure passage 8 leaking to the atmosphere, increases the negative pressure in the negative pressure chamber 4d, and opens the valve body 4a. On the other hand, when the valve body 4a opens and the pressure in the constant pressure chamber 13 exceeds a predetermined value, the pressure in the pressure chamber 11b also decreases correspondingly, and the valve body 11
d is moved downward by the spring 11e to open the negative pressure leak hole 8a, and the amount of the intake negative pressure in the negative pressure passage 8 leaking to the atmosphere increases, reducing the negative pressure in the negative pressure chamber 4d.
The valve body 4a is operated to close by a spring 4f.
By repeating these steps, the pressure in the constant pressure chamber 13 is controlled to a predetermined value (approximately atmospheric pressure), and the exhaust gas recirculation rate is made constant with respect to the amount of intake air.
上記のような排気ガス還流状態でエンジンを継
続運転すると、還流制御弁本体５は排気ガスによ
り加熱されて温度が上昇しようとする。しかしな
がら、還流制御弁本体５の熱は該本体５と当接し
たガスケツト６に伝熱され、一部は放熱容量の大
きい吸気マニホールド３に放熱されるとともに、
ガスケツト６の外縁全周に形成された突出部６ｂ
に伝熱される。該突出部６ｂはエンジンの冷却フ
アン（図示せず）の風および車両の走行風によつ
て有効に冷却されるため、突出部６ｂに伝熱され
た熱は有効に放熱されて還流制御弁本体５の放熱
性を高めることができる。 When the engine is continuously operated in the exhaust gas recirculation state as described above, the recirculation control valve main body 5 is heated by the exhaust gas and its temperature tends to rise. However, the heat of the reflux control valve body 5 is transferred to the gasket 6 that is in contact with the body 5, and a portion of the heat is radiated to the intake manifold 3, which has a large heat radiation capacity.
A protrusion 6b formed around the entire outer edge of the gasket 6
heat is transferred to Since the protrusion 6b is effectively cooled by the wind from the engine cooling fan (not shown) and the vehicle running wind, the heat transferred to the protrusion 6b is effectively dissipated into the reflux control valve body. The heat dissipation of No. 5 can be improved.
また、還流制御弁４の弁体４ａ上流の排気ガス
還流通路１にオリフイス６ａを形成するガスケツ
ト６は、該通路１内に所定量突出しているため、
該通路１内の排気ガスの熱を有効に受けて突出部
６ｂから放熱される。そのため、還流制御弁本体
５に流入する排気ガス温を低減でき、還流制御弁
本体５および還流制御弁４の温度上昇を抑えるこ
とができる。 Further, since the gasket 6 forming the orifice 6a in the exhaust gas recirculation passage 1 upstream of the valve body 4a of the recirculation control valve 4 protrudes a predetermined amount into the passage 1,
The heat of the exhaust gas in the passage 1 is effectively received and radiated from the protrusion 6b. Therefore, the temperature of the exhaust gas flowing into the reflux control valve main body 5 can be reduced, and the temperature rise of the reflux control valve main body 5 and the reflux control valve 4 can be suppressed.
したがつて、熱伝導性の高い金属性ガスケツト
６に、大気中に所定量突出する突出部６ｂと、排
気ガス還流通路１内に所定量突出する突出部６ａ
とを形成した簡単な構造により還流制御弁本体５
および還流制御弁４の温度上昇が防止され、還流
制御弁本体５の熱変形による取付ボルト等の締付
け力低下や還流制御弁４のダイヤフラム４Ｃの耐
久性低下が防止できる。 Therefore, the metal gasket 6 having high thermal conductivity has a protrusion 6b that protrudes into the atmosphere by a predetermined amount, and a protrusion 6a that protrudes a predetermined amount into the exhaust gas recirculation passage 1.
The reflux control valve body 5 has a simple structure with
Also, the temperature of the reflux control valve 4 is prevented from rising, and a decrease in the tightening force of the mounting bolts and the like and a decrease in the durability of the diaphragm 4C of the reflux control valve 4 due to thermal deformation of the reflux control valve body 5 can be prevented.
第２図に示す第２実施例は、ガスケツト６′の
突出部６′ｂの放熱性を高めた構造で、具体的に
は、突出部６′ｂ全面に複数個の切り起し部６′ｃ
を形成して該切り起し部６′ｃに風を有効に当て
て放熱性を高めたものである。この構造では上記
第１実施例のものよりより効果が大きい。 The second embodiment shown in FIG. 2 has a structure in which the heat dissipation of the protruding part 6'b of the gasket 6' is improved. Specifically, a plurality of cut-out parts 6' are provided on the entire surface of the protruding part 6'b. c.
The cut-and-raised portion 6'c is effectively exposed to air to improve heat dissipation. This structure has a greater effect than that of the first embodiment.
以上の説明から明らかなように本考案によれ
ば、還流制御弁本体の排気ガス還流通路と該本体
外の排気ガス還流通路との接続部に介挿した熱伝
導性の高い金属性ガスケツトに、大気中に所定量
突出する突出部と、排気ガス還流通路内に所定量
突出する突出部とを形成した簡単な構造により、
還流制御弁本体および還流制御弁の温度上昇を抑
えることができ、該本体および還流制御弁の熱害
を効果的に防止することができる。 As is clear from the above description, according to the present invention, a highly thermally conductive metallic gasket inserted between the exhaust gas recirculation passage of the recirculation control valve main body and the exhaust gas recirculation passage outside the main body, With a simple structure that has a protrusion that protrudes a predetermined amount into the atmosphere and a protrusion that protrudes a predetermined amount into the exhaust gas recirculation passage,
The temperature rise of the reflux control valve main body and the reflux control valve can be suppressed, and heat damage to the main body and the reflux control valve can be effectively prevented.
第１図は本考案の第１実施例を示す全体断面
図、第２図は本考案の第２実施例を示すガスケツ
トの断面図である。
１……排気ガス還流通路、１ａ……第１通路、
１ｂ……第２通路、４……還流制御弁、５……還
流制御弁本体、６……ガスケツト、６ａ……突出
部（オリフイス）、６ｂ……突出部、７……接続
部。
FIG. 1 is an overall cross-sectional view showing a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of a gasket showing a second embodiment of the present invention. 1... Exhaust gas recirculation passage, 1a... First passage,
1b...second passage, 4...reflux control valve, 5...reflux control valve body, 6...gasket, 6a...protrusion (orifice), 6b...protrusion, 7...connection part.
Claims (1)
排気ガス還流通路の一部を排気ガス還流量を制御
する還流制御弁を備えた還流制御弁本体で形成
し、該本体の排気ガス還流通路と還流制御弁本体
外の排気ガス還流通路との接続部に熱伝導性の高
い金属製ガスケツトを介挿したエンジンの排気ガ
ス還流装置において、上記ガスケツトに、大気中
に所定量突出する突出部と、排気ガス還流通路内
に所定量突出する突出部とを形成したことを特徴
とするエンジンの排気ガス還流装置。 A part of the exhaust gas recirculation passage that recirculates part of the exhaust gas of the engine to the intake system is formed by a recirculation control valve main body that is equipped with a recirculation control valve that controls the amount of exhaust gas recirculation, and the exhaust gas recirculation passage of the main body and In an engine exhaust gas recirculation device in which a metal gasket with high thermal conductivity is inserted at a connection part with an exhaust gas recirculation passage outside the recirculation control valve main body, the gasket includes a protrusion that protrudes into the atmosphere by a predetermined amount; 1. An exhaust gas recirculation device for an engine, comprising a protruding portion that protrudes a predetermined amount into an exhaust gas recirculation passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981076055U JPS6224037Y2 (en) | 1981-05-25 | 1981-05-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981076055U JPS6224037Y2 (en) | 1981-05-25 | 1981-05-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57188949U JPS57188949U (en) | 1982-11-30 |
| JPS6224037Y2 true JPS6224037Y2 (en) | 1987-06-19 |
Family
ID=29871763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981076055U Expired JPS6224037Y2 (en) | 1981-05-25 | 1981-05-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6224037Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5014932A (en) * | 1973-05-08 | 1975-02-17 | ||
| JPS5612196B2 (en) * | 1973-12-04 | 1981-03-19 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5378316U (en) * | 1976-12-03 | 1978-06-29 | ||
| JPS5612196U (en) * | 1979-07-07 | 1981-02-02 |
-
1981
- 1981-05-25 JP JP1981076055U patent/JPS6224037Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5014932A (en) * | 1973-05-08 | 1975-02-17 | ||
| JPS5612196B2 (en) * | 1973-12-04 | 1981-03-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57188949U (en) | 1982-11-30 |
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