JPH0411220U

JPH0411220U -

Info

Publication number: JPH0411220U
Application number: JP5266190U
Authority: JP
Priority date: 1990-05-22
Filing date: 1990-05-22
Publication date: 1992-01-30

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係る過給機付エ
ンジンの排気制御弁構造の要部構成図、第２図は
第１図の構造の排気バイパス弁開弁状態を示す要
部構造図、第３図は第１図の構造の排気切替弁開
弁状態を示す要部構成図、第４図は第１図の構造
が適用された過給機付エンジンの全体構成図、第
５図は本考案の第２実施例に係る過給機付エンジ
ンの排気制御弁構造の要部断面図、第６図は第５
図の構造の横断面図、である。１……エンジン本体、２……主ターボチヤージ
ヤ、２ａ，３ａ……タービン、２ｂ，３ｂ……コ
ンプレツサ、３……副ターボチヤージヤ、６，７
……吸気通路、８……インタークーラ、９……サ
ージタンク、１０……排気マニホルド、１０ａ…
…連通管、１１ａ，１１ｂ，４２ａ，４２ｂ……
排気通路、１２……排気集合管、１５，４１……
排気切替弁、１６……吸気切替弁、１７……吸気
バイパス通路、１８……吸気バイパス弁、２２…
…ウエストゲートバルブ、２７……スロツトル弁
、２９，４３……排気バイパス弁、３０……開口
（穴）、３１，５１……遊び、３２，４５……リ
ンク機構、３３……アクチユエータ、３３ａ……
ロツド、３４，３５，４６，４７……リンク、３
６，３９，４８，４９……ピン、３７，５０……
ロツド延長部材、３８，５２……スプリング、４
０ａ……三方電磁弁、４０ｂ……デユーテイ制御
二方電磁弁、４４……連通路。 Fig. 1 is a configuration diagram of the main parts of the exhaust control valve structure of a supercharged engine according to the first embodiment of the present invention, and Fig. 2 is the main part structure showing the exhaust bypass valve of the structure shown in Fig. 1 in the open state. Fig. 3 is a main part configuration diagram showing the exhaust switching valve open state of the structure shown in Fig. 1, Fig. 4 is an overall configuration diagram of a supercharged engine to which the structure shown in Fig. 1 is applied, and Fig. 5 The figure is a sectional view of the main part of the exhaust control valve structure of a supercharged engine according to the second embodiment of the present invention, and FIG.
1 is a cross-sectional view of the structure of FIG. 1... Engine body, 2... Main turbocharger, 2a, 3a... Turbine, 2b, 3b... Compressor, 3... Sub-turbocharger, 6, 7
...Intake passage, 8...Intercooler, 9...Surge tank, 10...Exhaust manifold, 10a...
...Communication pipe, 11a, 11b, 42a, 42b...
Exhaust passage, 12... Exhaust collecting pipe, 15, 41...
Exhaust switching valve, 16...Intake switching valve, 17...Intake bypass passage, 18...Intake bypass valve, 22...
...wastegate valve, 27...throttle valve, 29,43...exhaust bypass valve, 30...opening (hole), 31,51...play, 32,45...link mechanism, 33...actuator, 33a... …
Rod, 34, 35, 46, 47... Link, 3
6, 39, 48, 49... pin, 37, 50...
Rod extension member, 38, 52...Spring, 4
0a...Three-way solenoid valve, 40b...Duty control two-way solenoid valve, 44...Communication path.

Claims

[Scope of utility model registration request]

This valve is installed in the engine exhaust system connected to the main turbocharger and auxiliary turbocharger that are installed in parallel with the engine body. When the valve is opened, exhaust gas from the engine body is flowed to the auxiliary turbocharger in addition to the main turbocharger. An exhaust switching valve that enables supply operation is provided in the exhaust system, and the valve is opened to supercharge a portion of the exhaust gas before switching from supercharging operation of only the main turbocharger to supercharging operation of both turbochargers. In a supercharged engine equipped with an exhaust bypass valve that flows through an inactive auxiliary turbocharger and causes the auxiliary turbocharger to perform a run-up rotation, the exhaust switching valve and the exhaust bypass valve are opened so that the driving force is exhausted first. An exhaust control valve structure for a supercharged engine, characterized in that it is connected to a single actuator via a link mechanism having play that can be transmitted to a bypass valve and then to an exhaust switching valve.