JPS59184325U

JPS59184325U - Internal combustion engine with exhaust turbocharger

Info

Publication number: JPS59184325U
Application number: JP8070183U
Authority: JP
Inventors: 洋松田
Original assignee: 日産ディーゼル工業株式会社
Priority date: 1983-05-27
Filing date: 1983-05-27
Publication date: 1984-12-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の排気ターホ過給機付内燃機関を示す概略
断面図、第２図はこの考案の実施例の概略断面図、第３
図はこの考案の実施例の弁の作動図でイは通路開閉弁、
口はウェストゲート弁、ハは給気切換弁、二は通路開閉
弁のブースト圧との関係を示す作動図である。図において、１は機関、２は排気ターボ過給機、３は給
気通路、４はコンプレッサ、７はバイパス給気通路、８
は通路開閉弁、９はバイパス給気通路の下流分岐部、１
１は給気切換弁、１３はウェストゲート弁、２４はコン
トロールユニット、２６は給気通路である。Fig. 1 is a schematic sectional view showing a conventional internal combustion engine with exhaust turbocharger, Fig. 2 is a schematic sectional view of an embodiment of this invention, and Fig. 3 is a schematic sectional view showing an internal combustion engine with a conventional exhaust turbocharger.
The figure is an operational diagram of the valve of the embodiment of this invention, and A is the passage opening/closing valve;
1 is an operation diagram showing the relationship between the boost pressure of the waste gate valve, the air supply switching valve C, and the passage opening/closing valve. In the figure, 1 is the engine, 2 is the exhaust turbo supercharger, 3 is the air supply passage, 4 is the compressor, 7 is the bypass air supply passage, 8
9 is a downstream branch of the bypass air supply passage; 1 is a passage opening/closing valve;
1 is an air supply switching valve, 13 is a waste gate valve, 24 is a control unit, and 26 is an air supply passage.

Claims

[Scope of utility model registration request]

A bypass air supply passage that bypasses the compressor of the supercharger is attached to the air supply passage, and a passage opening/closing valve is provided in the bypass air supply passage, and the bypass air supply passage is downstream of the compressor and downstream of the bypass air supply passage. An air supply switching valve is provided in the upstream part of the branch, and a wastegate valve is further provided in the exhaust passage, and these passage opening/closing valves, the air supply switching valve, and the wastegate valve are operated in conjunction with each other according to the operating state of the engine. When a signal is sent from , the passage opening/closing valve and the waste gate valve are opened in the partial load area, the supply air switching valve is closed, and the passage opening/closing valve and the waste gate valve are closed in the high load area.
When the air supply switching valve opens and the boost pressure in the air supply passage downstream of the downstream branch of the bypass air supply passage increases, the wastegate valve opens and some of the exhaust air escapes, causing abnormal boost pressure. An internal combustion engine with an exhaust turbo supercharger characterized in that a passage opening/closing valve opens when pressure is reached.