JPS63183429U

JPS63183429U -

Info

Publication number: JPS63183429U
Application number: JP7432587U
Authority: JP
Priority date: 1987-05-20
Filing date: 1987-05-20
Publication date: 1988-11-25

Description

[Brief explanation of drawings]

図面は本考案の一実施例を示し、第１図は本考
案に係る機械式過給機を備える内燃エンジンのバ
イパスバルブ制御装置の全体構成を示すブロツク
図、第２図は第１図に示すバイパスバルブ２３の
開弁度合（ストローク）とアクチユエータ２４の
負圧室２４ｅに供給される負圧の大きさとの関係
を示すグラフ、第３図はバイパスバルブ２３を閉
弁させるべき所定の運転領域を示すグラフ、第４
図は第１図の電子コントロールユニツト２０によ
り実行されるバイパスバルブの制御手順を示すフ
ローチヤートである。１０…内燃エンジン、１２…吸気管（吸気通路
）、１５…スロツトル弁、１６…スーパーチヤー
ジヤ（過給機）、１７…電磁クラツチ、２０…電
子コントロールユニツト（ＥＣＵ）、２２…バイ
パス通路、２３…バイパスバルブ、２４…アクチ
ユエータ、２４ｅ…負圧室、２６…電磁切換弁、
２８…管路（第１の管路）、２９…管路（第２の
管路）、３０…スロツトル開度センサ、３１…エ
ンジン回転数センサ、３２…スーパーチヤージヤ
（Ｓ／Ｃ）回転数センサ。 The drawings show one embodiment of the present invention, FIG. 1 is a block diagram showing the overall configuration of a bypass valve control device for an internal combustion engine equipped with a mechanical supercharger according to the present invention, and FIG. 2 is shown in FIG. 1. A graph showing the relationship between the opening degree (stroke) of the bypass valve 23 and the magnitude of the negative pressure supplied to the negative pressure chamber 24e of the actuator 24, FIG. 3 shows a predetermined operating range in which the bypass valve 23 should be closed. Graph shown, 4th
This figure is a flowchart showing the bypass valve control procedure executed by the electronic control unit 20 of FIG. DESCRIPTION OF SYMBOLS 10... Internal combustion engine, 12... Intake pipe (intake passage), 15... Throttle valve, 16... Supercharger (supercharger), 17... Electromagnetic clutch, 20... Electronic control unit (ECU), 22... Bypass passage, 23 ...bypass valve, 24...actuator, 24e...negative pressure chamber, 26...electromagnetic switching valve,
28... Pipe line (first pipe line), 29... Pipe line (second pipe line), 30... Throttle opening sensor, 31... Engine rotation speed sensor, 32... Supercharger (S/C) rotation speed sensor.

Claims

[Scope of utility model registration request]

A mechanical supercharger driven by the internal combustion engine via a clutch is disposed in an intake passage downstream of a throttle valve of the internal combustion engine, and a bypass passage for bypassing the supercharger is connected to the intake passage. A bypass valve is provided in the middle of the bypass passage, an actuator that responds to negative pressure is connected to the bypass valve, and pressure generated in the intake passage downstream of the throttle valve is supplied to the actuator to open and close the bypass valve. In the bypass valve control device, a first pipe line is connected to the actuator via an electromagnetic switching valve, and one end is connected to an intake passage downstream of the throttle valve and upstream of the supercharger, and one end is connected to the intake passage downstream of the supercharger. A sensor is connected to a second conduit connected to an intake passage of the supercharger and detects a failure of the supercharger, and when the sensor detects a failure of the supercharger, the clutch is turned off. The supercharger is deactivated, the electromagnetic switching valve is switched, and the pressure generated in the intake passage downstream of the supercharger is supplied to the actuator via the second pipe line. A bypass valve control device for an internal combustion engine with a mechanical supercharger.