JPH03122237U

JPH03122237U -

Info

Publication number: JPH03122237U
Application number: JP3051390U
Authority: JP
Priority date: 1990-03-27
Filing date: 1990-03-27
Publication date: 1991-12-13

Description

[Brief explanation of drawings]

第１図は本考案に係る過給機付エンジンの系統
図、第２図は第１図の装置における吸気バイパス
弁閉弁時の部分拡大断面図、第３図は第１図の装
置における吸気バイパス弁開弁時の部分拡大断面
図、第４図は副ターボチヤージヤを助走回転させ
る機能を有する過給機付エンジンの一例を示す系
統図、第５図は第４図の装置の部分拡大図、第６
図は従来の過給機付エンジンの系統図、である。１……エンジン、４……スロツトル弁、７……
主ターボチヤージヤ、７ｂ……主ターボチヤージ
ヤのコンプレツサ、８……副ターボチヤージヤ、
１３……吸気バイパス通路、１３ａ……吸気バイ
パス通路の下流端開口部、１５ａ……吸気通路（
コンプレツサ上流）、１７……排気切替弁、１８
……吸気切替弁、３３……吸気バイパス弁。 Fig. 1 is a system diagram of a supercharged engine according to the present invention, Fig. 2 is a partially enlarged sectional view of the device shown in Fig. 1 when the intake bypass valve is closed, and Fig. 3 is an intake air flow diagram of the device shown in Fig. 1. FIG. 4 is a system diagram showing an example of a supercharged engine having a function of running up the auxiliary turbocharger; FIG. 5 is a partially enlarged view of the device shown in FIG. 4; 6th
The figure is a system diagram of a conventional supercharged engine. 1...Engine, 4...Throttle valve, 7...
Main turbocharger, 7b... Main turbocharger compressor, 8... Sub-turbocharger,
13...Intake bypass passage, 13a...Downstream end opening of the intake bypass passage, 15a...Intake passage (
compressor upstream), 17...exhaust switching valve, 18
...Intake switching valve, 33...Intake bypass valve.

Claims

[Scope of utility model registration request]

A main turbocharger, a sub-turbocharger, and an intake switching valve and an exhaust switching valve respectively provided in the intake and exhaust systems of an engine connected to the sub-turbocharger, and the sub-turbocharger performs a run-up operation on the sub-turbocharger before the sub-turbocharger reaches supercharging operation. The supercharged engine is configured to rotate and allow intake air to flow into the compressor inlet side of a main turbocharger through a compressor of an auxiliary turbocharger and an intake bypass passage that can communicate with the compressor, the engine having a supercharger that causes intake air to flow into the compressor inlet side of a main turbocharger through a compressor of a sub-turbocharger and an intake bypass passage that can communicate with the compressor. A supercharged engine characterized in that an intake bypass valve is provided in an end opening for causing intake air flowing out from the downstream end of an intake bypass passage when the valve is opened to flow along the flow of intake air toward a compressor inlet of a main turbocharger. .