JPH02149830U - - Google Patents
Info
- Publication number
- JPH02149830U JPH02149830U JP5806789U JP5806789U JPH02149830U JP H02149830 U JPH02149830 U JP H02149830U JP 5806789 U JP5806789 U JP 5806789U JP 5806789 U JP5806789 U JP 5806789U JP H02149830 U JPH02149830 U JP H02149830U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- low
- target value
- engine
- turbocharger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Supercharger (AREA)
Description
第１図は本考案の一実施例の全体構成図、第２
図は過給圧特性を示す線図である。
１……エンジン、２，４……排気通路、３……
高圧段タービン、５……低圧段タービン、７，９
，１２……給気通路、８……高圧段コンプレツサ
、１０……電子式制御装置、１１……回転数セン
サ、１３……負荷センサ、２１……排気バイパス
通路、２２……排気バイパス弁、２３，２５……
アクチユエータ、２３ｂ……第１の圧力室、２５
ｂ……第２の圧力室、４２……ウエイストゲート
弁、７６……圧力センサ、１４，９３……電磁式
三方弁、Ｈ……高圧段ターボチヤージヤ、Ｌ……
低圧段ターボチヤージヤ、Ｐ１……過給圧、Ｐ１
ａ……第１の目標値、Ｐ１ｂ……第２の目標値、
Ｒ２……負荷の設定値。
Figure 1 is an overall configuration diagram of one embodiment of the present invention, Figure 2
The figure is a diagram showing boost pressure characteristics. 1... Engine, 2, 4... Exhaust passage, 3...
High pressure stage turbine, 5...Low pressure stage turbine, 7, 9
, 12...Air supply passage, 8...High pressure stage compressor, 10...Electronic control device, 11...Rotational speed sensor, 13...Load sensor, 21...Exhaust bypass passage, 22...Exhaust bypass valve, 23, 25...
Actuator, 23b...first pressure chamber, 25
b...Second pressure chamber, 42...Wastegate valve, 76...Pressure sensor, 14, 93...Solenoid three-way valve, H...High pressure stage turbocharger, L...
Low pressure stage turbo charge, P 1 ...Supercharging pressure, P 1
a ...first target value, P1b ...second target value,
R2 ...Load setting value.
Claims (1)
、前記低圧段ターボチヤージヤにおいて加圧され
た空気をさらに加圧してエンジンに送る高圧段タ
ーボチヤージヤとを有する２段ターボ過給エンジ
ンにおいて、高圧段タービンに対して設けた排気
バイパス通路を開閉する排気バイパス弁を作動さ
せるためのアクチユエータに制御圧を導入する２
つの圧力室を設け、第１の圧力室には、エンジン
の負荷が設定値に達するまでは過給圧を比較的低
い第１の目標値に維持するため、制御圧として高
圧段コンプレツサの下流に圧力を導入すると共に
、負荷が設定値を超えたとき、低圧段コンプレツ
サ下流の圧力が所定の目標値に達するまでは過給
圧を比較的高い第２の目標値に維持するため、制
御圧として大気圧のような低圧を導入する切換え
手段が設けられ、第２の圧力室には前記高圧段コ
ンプレツサの下流の圧力が導入されることを特徴
とする２段ターボ過給エンジンの過給圧制御装置
。 A two-stage turbocharged engine having a low-pressure turbocharger that pressurizes intake air, and a high-pressure turbocharger that further pressurizes the air pressurized in the low-pressure turbocharger and sends it to the engine. Introducing control pressure to the actuator for operating the exhaust bypass valve that opens and closes the exhaust bypass passage 2
The first pressure chamber is provided with a control pressure downstream of the high-pressure stage compressor in order to maintain the boost pressure at a relatively low first target value until the engine load reaches the set value. When the pressure is introduced and the load exceeds the set value, the boost pressure is maintained at a relatively high second target value until the pressure downstream of the low-pressure stage compressor reaches a predetermined target value. Supercharging pressure control for a two-stage turbocharged engine, characterized in that switching means for introducing low pressure such as atmospheric pressure is provided, and pressure downstream of the high pressure stage compressor is introduced into the second pressure chamber. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5806789U JPH0744736Y2 (en) | 1989-05-22 | 1989-05-22 | Supercharging pressure controller for 2-stage turbocharged engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5806789U JPH0744736Y2 (en) | 1989-05-22 | 1989-05-22 | Supercharging pressure controller for 2-stage turbocharged engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02149830U true JPH02149830U (en) | 1990-12-21 |
| JPH0744736Y2 JPH0744736Y2 (en) | 1995-10-11 |
Family
ID=31583341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5806789U Expired - Lifetime JPH0744736Y2 (en) | 1989-05-22 | 1989-05-22 | Supercharging pressure controller for 2-stage turbocharged engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0744736Y2 (en) |
-
1989
- 1989-05-22 JP JP5806789U patent/JPH0744736Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0744736Y2 (en) | 1995-10-11 |
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