JPS639424U

JPS639424U -

Info

Publication number: JPS639424U
Application number: JP10215086U
Authority: JP
Priority date: 1986-07-04
Filing date: 1986-07-04
Publication date: 1988-01-22

Description

[Brief explanation of drawings]

第１図は本考案に係る一実施例の全体構成図、
第２図は吸入空気量と吸気通路内圧力との関係図
、第３図は制御圧力と吸入空気量との関係図、第
４図は従来の排気ターボチヤージヤの過給圧制御
装置の全体構成図、第５図は可変容量型排気ター
ボチヤージヤの断面図、第６図は従来技術の問題
点説明図である。１４……アクチユエータ、１４Ａ……ダイヤフ
ラム、１４Ｂ……制御圧室、１５……ロツド、１
６……フラツプ、２１……タービン、２２……コ
ンプレツサ、２２Ａ……インペラ、２３……バイ
パス通路、２４……バイパス弁、２５……過給圧
導入通路、２６……調圧弁、２６Ｂ……制御圧室
、２６Ｆ……弁体、２７……コンプレツサ上流側
の吸気通路、３０……室、３１……連通通路。 FIG. 1 is an overall configuration diagram of an embodiment according to the present invention,
Figure 2 is a relationship diagram between intake air amount and intake passage pressure, Figure 3 is a relationship diagram between control pressure and intake air amount, and Figure 4 is an overall configuration diagram of a conventional boost pressure control device for an exhaust turbocharger. , FIG. 5 is a sectional view of a variable displacement exhaust turbocharger, and FIG. 6 is a diagram illustrating problems with the prior art. 14... Actuator, 14A... Diaphragm, 14B... Control pressure chamber, 15... Rod, 1
6... Flap, 21... Turbine, 22... Compressor, 22A... Impeller, 23... Bypass passage, 24... Bypass valve, 25... Boost pressure introduction passage, 26... Pressure regulating valve, 26B... Control pressure chamber, 26F... Valve body, 27... Intake passage on the upstream side of the compressor, 30... Chamber, 31... Communication passage.

Claims

[Scope of utility model registration request]

A variable capacity exhaust turbocharger comprising a turbine and a compressor impeller connected by a rotating shaft, and a variable throttle for adjusting the amount of exhaust energy supplied by throttling the exhaust gas supplied to the turbine, and an exhaust passage located upstream of the turbine. A bypass valve is installed in a bypass passage that bypasses the turbine, and the pressure in the intake passage on the downstream side of the compressor is guided to a control pressure chamber through a boost pressure introduction passage, and the bypass valve is opened according to the pressure in the control pressure chamber. In a supercharging pressure control device for a variable displacement exhaust turbocharger, the system includes an actuator that variably controls the pressure of the compressor, a control pressure chamber to which the pressure of the intake passage on the upstream side of the compressor is guided, and a valve that opens and closes according to the pressure in the control pressure chamber. A pressure regulating valve is provided in the boost pressure introduction passage, and includes a chamber that is connected to the intake passage on the upstream side of the compressor and communicates with the boost pressure introduction passage through the valve body, and A supercharging pressure control device for an exhaust turbocharger, characterized in that the pressure introduced into the control pressure chamber of an actuator is variably controlled.