JPH01166751U - - Google Patents
Info
- Publication number
- JPH01166751U JPH01166751U JP6303588U JP6303588U JPH01166751U JP H01166751 U JPH01166751 U JP H01166751U JP 6303588 U JP6303588 U JP 6303588U JP 6303588 U JP6303588 U JP 6303588U JP H01166751 U JPH01166751 U JP H01166751U
- Authority
- JP
- Japan
- Prior art keywords
- passage
- valve
- exhaust gas
- pressure region
- control valve
- 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
- 238000010992 reflux Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Description
第１図はこの考案の排気ガス還流装置を備えた
エンジンの一実施例を示す排気ガス還流制御系の
概要図、第２図は２連式の排気ガス還流制御バル
ブの一実施例を示す縦断面図、第３図は第２図に
示す２連式の排気ガス還流制御バルブのバルブリ
フト量を示すグラフ、第４図は同じくバルブ通路
面積を示すグラフである。
１……エンジン、２……排気通路、３……吸気
通路、４……スモークセンサ、６……排気ガス還
流通路、７……第１還流制御バルブ、８……第２
還流制御バルブ、９，１０……アクチユエータ、
１１……ポジシヨンセンサ、１２……バキユーム
ポンプ（圧力供給手段）、１３……圧力供給通路
（圧力供給手段）、１４……コントロールバルブ
（制御手段）、１５……コントロールユニツト（
制御手段）。
Fig. 1 is a schematic diagram of an exhaust gas recirculation control system showing an embodiment of an engine equipped with an exhaust gas recirculation device of this invention, and Fig. 2 is a vertical cross-section showing an embodiment of a dual-type exhaust gas recirculation control valve. 3 is a graph showing the valve lift amount of the dual exhaust gas recirculation control valve shown in FIG. 2, and FIG. 4 is a graph showing the valve passage area. DESCRIPTION OF SYMBOLS 1...Engine, 2...Exhaust passage, 3...Intake passage, 4...Smoke sensor, 6...Exhaust gas recirculation passage, 7...First recirculation control valve, 8...Second
Reflux control valve, 9, 10... actuator,
11... Position sensor, 12... Vacuum pump (pressure supply means), 13... Pressure supply passage (pressure supply means), 14... Control valve (control means), 15... Control unit (
control means).
Claims (1)
一部を吸気通路に還流させる排気ガス還流通路内
に、２個の第１、第２還流制御バルブを並列して
設け、該第１、第２還流制御バルブには、圧力供
給手段から圧力の供給を受けて該バルブを開閉さ
せるアクチユエータがそれぞれ備えられるととも
に、上記第１還流制御バルブは、上記圧力供給手
段により供給される所定圧力領域のみで通路面積
が変化するバルブ特性とし、上記第２還流制御バ
ルブは該バルブのリフト量を検出するポジシヨン
センサを備えているとともに、上記第１還流制御
バルブの通路面積が変化する所定圧力領域ではリ
フトのみを行つて通路面積はほとんど変化せず、
かつ上記所定圧力領域に隣接する圧力領域で通路
面積が変化するバルブ特性としたことを特徴とす
る、エンジンの排気ガス還流装置。 Two first and second recirculation control valves are provided in parallel in an exhaust gas recirculation passage that communicates the exhaust passage and the intake passage and recirculates part of the exhaust gas to the intake passage, and the first and second recirculation control valves are provided in parallel. The second reflux control valves each include an actuator that receives pressure from the pressure supply means to open and close the valve, and the first reflux control valve operates only in a predetermined pressure region supplied by the pressure supply means. The second reflux control valve has a position sensor that detects the lift amount of the valve, and in a predetermined pressure region where the passage area of the first reflux control valve changes. With only the lift performed, the aisle area remains almost unchanged.
An exhaust gas recirculation device for an engine, characterized in that the valve characteristic is such that a passage area changes in a pressure region adjacent to the predetermined pressure region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6303588U JPH0545809Y2 (en) | 1988-05-12 | 1988-05-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6303588U JPH0545809Y2 (en) | 1988-05-12 | 1988-05-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01166751U true JPH01166751U (en) | 1989-11-22 |
| JPH0545809Y2 JPH0545809Y2 (en) | 1993-11-26 |
Family
ID=31288569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6303588U Expired - Lifetime JPH0545809Y2 (en) | 1988-05-12 | 1988-05-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0545809Y2 (en) |
-
1988
- 1988-05-12 JP JP6303588U patent/JPH0545809Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0545809Y2 (en) | 1993-11-26 |