JPH046744U

JPH046744U -

Info

Publication number: JPH046744U
Application number: JP4665490U
Authority: JP
Priority date: 1990-05-02
Filing date: 1990-05-02
Publication date: 1992-01-22

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る排気切替弁の
開閉構造の縦断面図、第２図は第１図の装置を用
いた過給機付エンジンの全体構成図、第３図は第
１図の装置の閉弁時の概略側面図、第４図は第１
図の装置の開弁時の概略側面図、第５図は従来の
排気切替弁部の縦断面図、第６図は第５図の装置
の拡大部分断面図、である。１１……エンジン本体、１２……主ターボチヤ
ージヤ、１２ａ，１３ａ……タービン、１２ｂ，
１３ｂ……コンプレツサ、１３……副ターボチヤ
ージヤ、１６，１７…吸気通路、１８……インタ
ークーラ、１９……サージタンク、２０……排気
マニホルド、２１……排気通路、２３……バルブ
ボデー、２４……排気通路、２５……排気切替弁
、２６……吸気切替弁、２７……吸気バイパス通
路、２９……排気バイパス通路、３４……ウエス
トゲートバルブ、３６……スロツトル弁、３８…
…弁軸、３９……ブツシユ、４０ａ，４０ｂ……
蓋、４１……駆動軸、４２……ブツシユ、４３…
…シール部材、４４……リンク機構（内部）、４
５……リンク機構（外部）、４６……アクチユエ
ータ。 Fig. 1 is a vertical sectional view of an opening/closing structure of an exhaust switching valve according to an embodiment of the present invention, Fig. 2 is an overall configuration diagram of a supercharged engine using the device shown in Fig. A schematic side view of the device shown in Figure 1 when the valve is closed, and Figure 4 is a side view of the device shown in Figure 1.
FIG. 5 is a longitudinal sectional view of a conventional exhaust switching valve section, and FIG. 6 is an enlarged partial sectional view of the device shown in FIG. 5. 11...Engine body, 12...Main turbocharger, 12a, 13a...Turbine, 12b,
13b... Compressor, 13... Sub-turbocharger, 16, 17... Intake passage, 18... Intercooler, 19... Surge tank, 20... Exhaust manifold, 21... Exhaust passage, 23... Valve body, 24... ...Exhaust passage, 25...Exhaust switching valve, 26...Intake switching valve, 27...Intake bypass passage, 29...Exhaust bypass passage, 34...Wastegate valve, 36...Throttle valve, 38...
... Valve stem, 39... Bush, 40a, 40b...
Lid, 41... Drive shaft, 42... Bush, 43...
... Seal member, 44 ... Link mechanism (inside), 4
5... Link mechanism (external), 46... Actuator.

Claims

[Scope of utility model registration request]

In an opening/closing structure for an exhaust switching valve in which an exhaust switching valve consisting of a butterfly valve is provided in an exhaust passage and the exhaust switching valve is opened and closed by an actuator, both ends of a valve shaft of the butterfly valve are rotatably supported on a wall of the exhaust passage. At the same time, both valve shaft support parts are hermetically sealed from the outside space, and a drive shaft is provided at a position downstream of the valve shaft in the exhaust gas flow direction, one end of which extends to the outside of the exhaust passage wall via the sealing member, An opening/closing structure for an exhaust switching valve, characterized in that the drive shaft and the butterfly valve are connected via an exhaust passage link mechanism, and the one end of the drive shaft is connected to the actuator.