JPH07189717A - Internal combustion engine with supercharger - Google Patents
Internal combustion engine with superchargerInfo
- Publication number
- JPH07189717A JPH07189717A JP5347963A JP34796393A JPH07189717A JP H07189717 A JPH07189717 A JP H07189717A JP 5347963 A JP5347963 A JP 5347963A JP 34796393 A JP34796393 A JP 34796393A JP H07189717 A JPH07189717 A JP H07189717A
- Authority
- JP
- Japan
- Prior art keywords
- supercharger
- internal combustion
- combustion engine
- exhaust gas
- output
- 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.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 31
- 239000000446 fuel Substances 0.000 abstract description 8
- 230000002000 scavenging effect Effects 0.000 abstract description 8
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 24
- 238000010586 diagram Methods 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Landscapes
- Supercharger (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は複数の排気ガスタービン
過給機を装備した内燃機関の過給機制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supercharger control device for an internal combustion engine equipped with a plurality of exhaust gas turbine superchargers.
【０００２】[0002]
【従来の技術】舶用の特に大型２サイクルディーゼル機
関には通常排気ガスタービン過給機が装備されている。
図４に代表的な排気ガスタービン過給機を装備した内燃
機関の外形図を示し、図５では内燃機関における排気ガ
スタービン過給の概念図を示す。次に図５を参照し、従
来の内燃機関の過給機の原理を説明する。内燃機関１０
には２台の排気ガスタービン過給機１（以下過給機と略
称する）が装備されており、内燃機関１０の排気集合管
２より流出する高圧の排気ガス１０１により過給機１内
のタービン１ａが回転する。2. Description of the Related Art An especially large two-stroke diesel engine for ships is usually equipped with an exhaust gas turbine supercharger.
FIG. 4 shows an external view of an internal combustion engine equipped with a typical exhaust gas turbine supercharger, and FIG. 5 shows a conceptual diagram of exhaust gas turbine supercharging in the internal combustion engine. Next, the principle of a conventional supercharger for an internal combustion engine will be described with reference to FIG. Internal combustion engine 10
Is equipped with two exhaust gas turbine superchargers 1 (hereinafter abbreviated as “superchargers”), and the high pressure exhaust gas 101 flowing out from the exhaust collecting pipe 2 of the internal combustion engine 10 causes The turbine 1a rotates.
【０００３】同過給機のコンプレッサ１ｂが該タービン
の回転力により駆動され、大気中より空気１００を給入
して圧縮し掃気溜３内に送る。該掃気溜内の圧縮空気は
シリンダ内に導入され、ピストン１１によりさらに圧縮
された後、図示しない燃料噴射弁より噴射された燃料の
燃焼によるガス圧力により機関出力が得られる。また同
時に燃焼ガス（排ガス）が生成され過給機１へ供給され
る。内燃機関内は以上のサイクルを繰り返し運転され
る。The compressor 1b of the supercharger is driven by the rotational force of the turbine, and air 100 is supplied from the atmosphere to be compressed and sent into the scavenging reservoir 3. The compressed air in the scavenging reservoir is introduced into the cylinder, is further compressed by the piston 11, and then the engine output is obtained by the gas pressure due to the combustion of the fuel injected from the fuel injection valve (not shown). At the same time, combustion gas (exhaust gas) is generated and supplied to the supercharger 1. The internal combustion engine is repeatedly operated in the above cycle.
【０００４】[0004]
【発明が解決しようとする課題】前記のとおり、過給機
は排気ガスのエネルギによりコンプレッサを回転させて
いる。従って機関の負荷（出力）が低い場合には、出力
に比例する排気ガスのエネルギも低いため、コンプレッ
サが十分に回転せず、高い圧力の圧縮空気（一般的に掃
気圧力と称するので以下掃気圧力と表現する。）が得ら
れない。これに伴って機関のコンプレッション圧力及び
燃焼による燃焼圧力が最適設計値よりかなり低い値とな
ってしまう。該燃焼圧力は内燃機関の燃料消費率に大き
く影響を与える因子であるため、この燃焼圧力を低負荷
（出力）時に如何にして最適設計値に近づけるかが今後
の課題となっている。As described above, the supercharger rotates the compressor by the energy of the exhaust gas. Therefore, when the load (output) of the engine is low, the energy of the exhaust gas proportional to the output is also low, so the compressor does not rotate sufficiently and the compressed air of high pressure (generally called scavenging pressure. Is not obtained. Along with this, the compression pressure of the engine and the combustion pressure due to combustion become much lower than the optimum design value. Since the combustion pressure is a factor that greatly affects the fuel consumption rate of the internal combustion engine, how to bring the combustion pressure closer to the optimum design value at low load (output) is a future subject.
【０００５】本発明の目的は、低負荷（出力）時でも掃
気圧力の上昇をはかり、筒内圧縮圧力及び燃焼圧力を最
適設計値に近づけることにより、低負荷（出力）時の燃
料消費率の大幅な低減が可能な過給機付内燃機関を提供
するにある。An object of the present invention is to increase the scavenging pressure even under a low load (output), and to bring the in-cylinder compression pressure and the combustion pressure close to the optimum design values, so that the fuel consumption rate at a low load (output) can be improved. An object of the present invention is to provide an internal combustion engine with a supercharger that can be significantly reduced.
【０００６】[0006]
【課題を解決するための手段】本発明の過給機付内燃機
関は、排気ガスタービン過給機を複数台装備する内燃機
関において、少なくとも１台の過給機を除いた他の過給
機の排気ガスタービン１ａのガス入口とコンプレッサ１
ｂ出口にそれぞれ設けられた流量制御弁４及び弁制御装
置５と、機関負荷（出力）信号を入力し前記流量制御弁
に対する制御信号を演算し、前記弁制御装置へ該信号を
出力するコントローラ６とを有してなることを特徴とし
ている。SUMMARY OF THE INVENTION An internal combustion engine with a supercharger according to the present invention is an internal combustion engine equipped with a plurality of exhaust gas turbine superchargers, the supercharger other than at least one supercharger. Inlet of the exhaust gas turbine 1a and compressor 1
A flow control valve 4 and a valve control device 5 respectively provided at the b outlet, and a controller 6 that inputs an engine load (output) signal, calculates a control signal for the flow control valve, and outputs the signal to the valve control device. It is characterized by having and.
【０００７】[0007]
【作用】あらかじめ設定されている負荷条件より低い負
荷信号がコントローラ６に入力されると、該コントロー
ラは過給機のガス入口と空気出口に取付けてある流量制
御弁４を閉に操作する。これによりその過給機１′は完
全に停止状態となるため、流量制御弁４を取付けていな
い過給機１のみに排気ガスが流れる。これにより機関負
荷（出力）が低く排気ガスエネルギが低い場合でも、過
給機１台当りの回収エネルギが増加するためコンプレッ
サ１ｂの圧力は上昇し、掃気圧力、筒内圧縮圧力、燃焼
圧力が上昇し、低負荷時の燃料消費率の減少が実現でき
る。When a load signal lower than the preset load condition is input to the controller 6, the controller closes the flow control valve 4 attached to the gas inlet and the air outlet of the supercharger. As a result, the supercharger 1 ′ is completely stopped, so that the exhaust gas flows only to the supercharger 1 to which the flow control valve 4 is not attached. As a result, even when the engine load (output) is low and the exhaust gas energy is low, the recovered energy per supercharger increases, so the pressure of the compressor 1b rises, and the scavenging pressure, in-cylinder compression pressure, and combustion pressure rise. However, it is possible to reduce the fuel consumption rate when the load is low.
【０００８】[0008]
【実施例】以下図１〜３を参照し本発明の一実施例につ
いて説明する。図１は２台の過給機１，１′を装備した
内燃機関に本発明を適用した外形図であり、図２は低負
荷（出力）時の空気及び排気ガス流れを表わした動力概
念図を示し、図３は本発明を適用した場合の代表的機関
性能図である。An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an external view of the present invention applied to an internal combustion engine equipped with two superchargers 1 and 1 ', and FIG. 2 is a power conceptual diagram showing air and exhaust gas flows at low load (output). FIG. 3 is a representative engine performance diagram when the present invention is applied.
【０００９】図２により本発明の構成を示す。第１実施
例の内燃機関には２台の過給機１，１′が配設されてい
るが、この２台うちの過給機１′の排気ガスタービン１
ａのガス入口とコンプレッサ１ｂの空気出口のみにそれ
ぞれ流量制御弁４が設けられている。また流量制御弁４
には機関負荷（出力）信号を入力して流量制御弁開度を
演算し、制御信号を出力するコトンローラ６と、コント
ローラ６の信号により流量制御弁４を制御する弁制御装
置５とを具備している。FIG. 2 shows the configuration of the present invention. The internal combustion engine of the first embodiment is provided with two superchargers 1 and 1 ′, and the exhaust gas turbine 1 of these two superchargers 1 ′ is provided.
The flow rate control valve 4 is provided only at the gas inlet of a and the air outlet of the compressor 1b. Also, the flow control valve 4
Is equipped with a cotton roller 6 which inputs an engine load (output) signal to calculate a flow control valve opening and outputs a control signal, and a valve control device 5 which controls the flow control valve 4 by the signal of the controller 6. ing.
【００１０】次に前記実施例の作用について説明する。
あらかじめ設定されている負荷条件より低い負荷信号が
コントローラ６に入力されると、該コントローラは過給
機１′のガス入口と空気出口に取付られた流量制御弁４
を弁制御装置５を介して弁を閉に操作する。これにより
その過給機１′は完全に停止状態となるため、流量制御
弁４を取付ていない過給機１のみに排気ガスが流れるこ
とになる。Next, the operation of the above embodiment will be described.
When a load signal lower than a preset load condition is input to the controller 6, the controller causes the flow control valve 4 attached to the gas inlet and the air outlet of the supercharger 1 '.
Is operated to close the valve via the valve control device 5. As a result, the supercharger 1'is completely stopped, so that the exhaust gas flows only to the supercharger 1 to which the flow rate control valve 4 is not attached.
【００１１】このように構成されているので、機関負荷
（出力）が低く排気ガスエネルギが少ない場合でも過給
機１の回収エネルギは倍加されるため、コンプレッサ１
ｂの圧力は上昇し、掃気圧力、筒内圧縮圧力、燃焼圧力
が上昇し、低負荷時の燃料消費率を減少させることがで
きる。With this configuration, the recovered energy of the supercharger 1 is doubled even when the engine load (output) is low and the exhaust gas energy is low, so that the compressor 1
The pressure of b is increased, the scavenging pressure, the in-cylinder compression pressure, and the combustion pressure are increased, and the fuel consumption rate at low load can be reduced.
【００１２】[0012]
【発明の効果】本発明によれば排気ガスタービン過給機
を複数台装備した内燃機関において、低負荷（出力）時
でも掃気圧力を上昇させることが可能となる。従って筒
内の圧縮圧力及び燃焼圧力を最適設計値に近づけること
が出来、これにより低負荷（出力）時の燃費率の大幅な
低減が可能となる。According to the present invention, in an internal combustion engine equipped with a plurality of exhaust gas turbine superchargers, it is possible to increase the scavenging pressure even when the load is low (output). Therefore, the compression pressure and the combustion pressure in the cylinder can be brought close to the optimum design values, which makes it possible to significantly reduce the fuel consumption rate at low load (output).
【図１】本発明の第１実施例に係る機関外形の図。FIG. 1 is an external view of an engine according to a first embodiment of the present invention.
【図２】同内燃機関の動作概念図。FIG. 2 is an operation conceptual diagram of the internal combustion engine.
【図３】代表的な機関性能線図。FIG. 3 is a typical engine performance diagram.
【図４】従来の機関外形図。FIG. 4 is an external view of a conventional engine.
【図５】従来の内燃機関の動作概念図。FIG. 5 is a conceptual diagram of an operation of a conventional internal combustion engine.
１，１′…排気ガスタービン過給機、１ａ…排気ガスタ
ービン、１ｂ…コンプレッサ、４…流量制御弁、５…弁
制御装置、６…コントローラ。1, 1 '... Exhaust gas turbine supercharger, 1a ... Exhaust gas turbine, 1b ... Compressor, 4 ... Flow control valve, 5 ... Valve control device, 6 ... Controller.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０２Ｂ 37/22 37/12 ３０２ Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display area F02B 37/22 37/12 302 D
Claims (1)
る内燃機関において、少なくとも１台の過給機を除いた
他の過給機の排気ガスタービン（１ａ）のガス入口とコ
ンプレッサ（１ｂ）出口にそれぞれ設けられた流量制御
弁（４）及び弁制御装置（５）と、機関負荷（出力）信
号を入力し前記流量制御弁に対する制御信号を演算し、
前記弁制御装置へ該信号を出力するコントローラ（６）
とを有してなる過給機付内燃機関。1. An internal combustion engine equipped with a plurality of exhaust gas turbine superchargers, the gas inlet of an exhaust gas turbine (1a) of another supercharger except at least one supercharger, and a compressor (1b). A flow control valve (4) and a valve control device (5) respectively provided at the outlets, and an engine load (output) signal are input to calculate a control signal for the flow control valve,
A controller (6) for outputting the signal to the valve control device
An internal combustion engine with a supercharger comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5347963A JPH07189717A (en) | 1993-12-24 | 1993-12-24 | Internal combustion engine with supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5347963A JPH07189717A (en) | 1993-12-24 | 1993-12-24 | Internal combustion engine with supercharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07189717A true JPH07189717A (en) | 1995-07-28 |
Family
ID=18393806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5347963A Withdrawn JPH07189717A (en) | 1993-12-24 | 1993-12-24 | Internal combustion engine with supercharger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07189717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009216093A (en) * | 2008-03-06 | 2009-09-24 | Waertsilae Schweiz Ag | Operating method for vertical scavenging two-cycle large diesel engine, and vertical scavenging two-cycle large diesel engine |
-
1993
- 1993-12-24 JP JP5347963A patent/JPH07189717A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009216093A (en) * | 2008-03-06 | 2009-09-24 | Waertsilae Schweiz Ag | Operating method for vertical scavenging two-cycle large diesel engine, and vertical scavenging two-cycle large diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010306 |