JPS6216727U

JPS6216727U -

Info

Publication number: JPS6216727U
Application number: JP10799885U
Authority: JP
Priority date: 1985-07-15
Filing date: 1985-07-15
Publication date: 1987-01-31

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の概略構成図、第
２図はその制御回路の一例の回路構成図、第３図
はこの考案による過給特性を従来例との比較にお
いて表した特性線図である。第４図は従来例の概
略構成図である。１……機関本体、３……排気通路、１１……吸
気マニホールド、１Ｅ……排気マニホールド、３
Ａ……第１排気通路、３Ｂ……第２排気通路、４
……吸気通路、４Ａ……第１吸気通路、４Ｂ……
第２吸気通路、５……第１ターボ過給機、５Ｔ…
…第１タービン、５Ｃ……第１コンプレツサ、６
……第２ターボ過給機、６Ｔ……第２タービン、
６Ｃ……第２コンプレツサ、９……第１排気バイ
パス弁、１０……第２排気バイパス弁、１１，１
２……ダイアフラムアクチユエータ、２０Ａ……
第１排気バイパス通路、２０Ｂ……第２排気バイ
パス通路、２１……流量制御弁、２３……電磁ソ
レノイド、２４……制御回路、２５Ａ，２５Ｂ…
…遮断弁、３１……ポテンシオメータ、３２……
回転数センサ、３３……Ｆ―Ｖ変換回路、３４…
…比較回路、３５……微分回路、３６……比較回
路、３７……ＯＲ回路、３８……駆動回路。 Figure 1 is a schematic configuration diagram of an embodiment of this invention, Figure 2 is a circuit diagram of an example of its control circuit, and Figure 3 is a characteristic line showing the supercharging characteristics of this invention in comparison with a conventional example. It is a diagram. FIG. 4 is a schematic diagram of a conventional example. 1...Engine body, 3...Exhaust passage, 11...Intake manifold, 1E...Exhaust manifold, 3
A...First exhaust passage, 3B...Second exhaust passage, 4
...Intake passage, 4A...First intake passage, 4B...
Second intake passage, 5...First turbo supercharger, 5T...
...First turbine, 5C...First compressor, 6
...Second turbo supercharger, 6T...Second turbine,
6C...Second compressor, 9...First exhaust bypass valve, 10...Second exhaust bypass valve, 11,1
2...Diaphragm actuator, 20A...
First exhaust bypass passage, 20B... Second exhaust bypass passage, 21... Flow rate control valve, 23... Electromagnetic solenoid, 24... Control circuit, 25A, 25B...
...Shutoff valve, 31... Potentiometer, 32...
Rotation speed sensor, 33...F-V conversion circuit, 34...
... Comparison circuit, 35 ... Differentiation circuit, 36 ... Comparison circuit, 37 ... OR circuit, 38 ... Drive circuit.

Claims

[Scope of utility model registration request]

A part of the intake passage upstream of the intake manifold of the engine and a part of the exhaust passage downstream of the exhaust manifold are respectively formed into two systems, a first and a second system, and the first intake/exhaust passage has a Comparatively small capacity first
A relatively large-capacity second turbo supercharger is installed in the second intake/exhaust passage, and the first exhaust passage leading to the exhaust turbine of the first turbo supercharger and the second A flow control valve that variably controls the exhaust flow rate in the second exhaust passage leading to the exhaust turbine of the turbocharger, a shutoff valve that prevents intake air from flowing back into the intake compressor, and a shutoff valve that detects the acceleration state and controls the A turbocharging device for an internal combustion engine, comprising: a control device that controls the flow rate control valve so as to supply most of the exhaust gas to a second turbocharger during acceleration.