JPH03119542U

JPH03119542U -

Info

Publication number: JPH03119542U
Application number: JP2914690U
Authority: JP
Priority date: 1990-03-23
Filing date: 1990-03-23
Publication date: 1991-12-10

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係る過給機付エン
ジンのシリンダヘツド、ターボチヤージヤ周りの
概略底面図、第２図は第１図の過給機付エンジン
の全体系統図、第３図は第２図の各切替弁の制御
フロー図、第４図は第３図の制御フローによるエ
ンジン回転数−過給圧特性図、第５図は従来の過
給機付エンジンの部分概略構成図、第６図は従来
の別の過給機付エンジンの部分概略構成図、第７
図は第５図の装置のシリンダヘツド周りの概略底
面図、第８図は第７図のエキゾーストマニホルド
の横断面図、第９図は第７図の装置におけるエギ
ゾーストマニホルドの変形の様子を示す概略底面
図、である。１……エンジン、２……サージタンク、３……
排気通路、４……スロツトル弁、５……スロツト
ル開度センサ、６……インタクーラ、７……主タ
ーボチヤージヤ、８……副ターボチヤージヤ、１
０……吸気バイパス弁のアクチユエータ、１１…
…吸気切替弁のアクチユエータ、１３……吸気バ
イパス通路、１４……吸気通路（コンプレツサ下
流）、１５……吸気通路（コンプレツサ上流）、
１６……排気切替弁のアクチユエータ、１７……
排気切替弁、１８……吸気切替弁、２４……エア
フローメータ、２５……第１の三方電磁弁、２６
……第２の三方電磁弁、２７……第３の三方電磁
弁、２８……第４の三方電磁弁、２９……エンジ
ンコントロールコンピユータ、３０……吸気管圧
力センサ、３１……ウエストゲートバルブ、３２
……第５の三方電磁弁、３３……吸気バイパス弁
、４０……シリンダヘツド、４１ａ，４１ｂ……
集合部、４２……連通路、４３……排気ポート。 Fig. 1 is a schematic bottom view of the cylinder head and turbocharger surroundings of a supercharged engine according to an embodiment of the present invention, Fig. 2 is an overall system diagram of the supercharged engine shown in Fig. 1, and Fig. 3 is a Fig. 2 is a control flow diagram of each switching valve, Fig. 4 is an engine speed-supercharging pressure characteristic diagram according to the control flow of Fig. 3, Fig. 5 is a partial schematic configuration diagram of a conventional supercharged engine, Figure 6 is a partial schematic diagram of another conventional supercharged engine;
The figure is a schematic bottom view of the cylinder head and surrounding area of the device shown in FIG. 5, FIG. 8 is a cross-sectional view of the exhaust manifold shown in FIG. 7, and FIG. 9 is a schematic diagram showing how the exhaust manifold in the device shown in FIG. 7 is deformed. This is a bottom view. 1...Engine, 2...Surge tank, 3...
Exhaust passage, 4...Throttle valve, 5...Throttle opening sensor, 6...Intercooler, 7...Main turbocharger, 8...Sub-turbocharger, 1
0...Intake bypass valve actuator, 11...
...Intake switching valve actuator, 13...Intake bypass passage, 14...Intake passage (downstream of compressor), 15...Intake passage (upstream of compressor),
16...Exhaust switching valve actuator, 17...
Exhaust switching valve, 18... Intake switching valve, 24... Air flow meter, 25... First three-way solenoid valve, 26
...Second three-way solenoid valve, 27...Third three-way solenoid valve, 28...Fourth three-way solenoid valve, 29...Engine control computer, 30...Intake pipe pressure sensor, 31...Waste gate valve , 32
...Fifth three-way solenoid valve, 33...Intake bypass valve, 40...Cylinder head, 41a, 41b...
Gathering part, 42...Communication path, 43...Exhaust port.

Claims

[Scope of utility model registration request]

A main turbocharger and a sub-turbocharger are provided, exhaust passages from each cylinder connected to both turbochargers are collected into two collecting parts corresponding to the two cylinder groups, and the two collecting parts are communicated with each other by a communication passage, A supercharged engine in which the number of operating turbochargers is changed by opening and closing a switching valve, characterized in that at least the two collecting parts and the communication passage of the exhaust passage are provided in a cylinder head. Machine engine.