JPS63138U

JPS63138U -

Info

Publication number: JPS63138U
Application number: JP9350886U
Authority: JP
Priority date: 1986-06-19
Filing date: 1986-06-19
Publication date: 1988-01-05

Description

[Brief explanation of the drawing]

第１図および第２図はこの考案の一実施例を示
すもので、第１図はエンジンの過給圧制御装置全
体の概略構成図、第２図はエンジン本体の運転状
態にもとづくウエストゲートバルブの開閉動作状
態を示す特性図、第３図は従来のエンジンの過給
圧制御装置全体の概略構成図、第４図は一般的な
ウエストゲートバルブの制御状態を示す特性図で
ある。２１……エンジン本体、２２……排気通路、２
４……過給機、２５……タービン、２７……バイ
パス通路、２８……ウエストゲートバルブ、３２
……付勢力発生部、３４……バルブ操作力調整機
構部。 Figures 1 and 2 show an embodiment of this invention. Figure 1 is a schematic diagram of the entire engine boost pressure control system, and Figure 2 is a diagram of the waste gate valve based on the operating state of the engine body. FIG. 3 is a schematic diagram of the overall configuration of a conventional engine supercharging pressure control device, and FIG. 4 is a characteristic diagram showing the control state of a general wastegate valve. 21...Engine body, 22...Exhaust passage, 2
4...Supercharger, 25...Turbine, 27...Bypass passage, 28...Waste gate valve, 32
...Biasing force generation section, 34...Valve operation force adjustment mechanism section.

Claims

[Scope of utility model registration request]

The engine is equipped with a bypass passage connected in parallel to the turbocharger turbine installed in the exhaust passage of the engine body, and equipped with a wastegate valve for boost pressure adjustment that opens and closes this bypass passage. In the supply pressure control device, a biasing force generator is provided that generates a biasing force that biases the waste gate valve in a direction to close the waste gate valve, and when the exhaust pressure in the exhaust passage of the engine body is lower than the set pressure, The waste gate valve is held in a closed state by the urging force of the urging force generating section, and when the exhaust pressure in the exhaust passage of the engine body exceeds a set pressure, the urging force of the urging force generating section is resisted. The waste gate valve is held in an openable state, and a pressing force corresponding to the amount of depression of the accelerator pedal is transmitted to the urging force generating section, and this pressing force increases the urging force of the urging force generating section. A boost pressure control device for an engine, comprising: a valve operating force adjustment mechanism that changes the amount of pressure according to the amount of depression of the accelerator pedal.