JPS5937226A - Surge avoiding device of internal combustion engine equipped with supercharger - Google Patents
Surge avoiding device of internal combustion engine equipped with superchargerInfo
- Publication number
- JPS5937226A JPS5937226A JP57148292A JP14829282A JPS5937226A JP S5937226 A JPS5937226 A JP S5937226A JP 57148292 A JP57148292 A JP 57148292A JP 14829282 A JP14829282 A JP 14829282A JP S5937226 A JPS5937226 A JP S5937226A
- Authority
- JP
- Japan
- Prior art keywords
- throttle valve
- pressure
- valve
- supercharger
- pressure downstream
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 9
- 230000007423 decrease Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、スロットル弁を有する過給機付内燃機関、例
えば、ガス機関のサージング回避装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surging avoidance device for a supercharged internal combustion engine, such as a gas engine, having a throttle valve.
一般に、遠心式過給機付内燃機関では、遠心翼車を通る
空気流量を絞った場合に、不安定な現象が生じ、振動や
騒音を発生するサージングの現象がみられる。すなわち
、サージング線を越えて過給機の使用はできない。とこ
ろが、スロットル弁を有する内燃機関において、第1図
に示す過給機作動線図で示すように、作動線&はサージ
ング線すを越えており、使用困難となっている。なS、
Cはディーゼル機関の過給機作動線を示す。したがって
、従来に?けるスロットル弁を有する内燃機関では、サ
ージングを生じに(い過給機を装備し、かつ、最高過給
圧を制限するため排気ガスをバイパスさせたウェストゲ
ートまたは給気圧力制限弁を用いている。Generally, in a centrifugal supercharged internal combustion engine, when the air flow rate passing through the centrifugal impeller is restricted, an unstable phenomenon occurs, and a surging phenomenon that generates vibration and noise is observed. In other words, the supercharger cannot be used beyond the surging line. However, in an internal combustion engine having a throttle valve, as shown in the supercharger operating diagram shown in FIG. 1, the operating line & is beyond the surging line, making it difficult to use. NaS,
C shows the supercharger operating line of the diesel engine. Therefore, conventionally? Internal combustion engines with throttle valves that do not cause surging are equipped with superchargers and use wastegates or charge pressure limiting valves that bypass exhaust gas to limit maximum boost pressure. .
しかしながら、機関に適合する過給機が市販(一般に過
給機は排気タービンとブロアが一体で製造され市販)さ
れていないときはスロットル弁を有する過給機付の内燃
機関とすることはできず、また、適合する過給機をつけ
た場合でも低負荷に8いては過給する必要がないにもか
かわらず、排気ガスが全量過給機を通過するため背圧が
高く、燃費が悪い。However, if a turbocharger compatible with the engine is not commercially available (generally, a turbocharger is manufactured and sold as an integrated exhaust turbine and blower), it is not possible to use an internal combustion engine with a turbocharger that has a throttle valve. Furthermore, even if a compatible supercharger is installed, there is no need for supercharging at low loads, but because all the exhaust gas passes through the supercharger, back pressure is high and fuel efficiency is poor.
そこで本発明は、以上従来の不具合を除去するために創
作されたもので、機関の低負荷から高負荷の全域にわた
りサージングの回避8よび低負荷時の燃費改善を行う装
置を提供することを目的とするものである。SUMMARY OF THE INVENTION The present invention was created in order to eliminate the above-mentioned conventional problems, and an object of the present invention is to provide a device that avoids surging over the entire engine load range from low to high loads and improves fuel efficiency at low loads. That is.
以下、本発明の構成を実施例にもとづき説明する。第2
図は本発明の第1の実施例で、第3図は第2の実施例を
示すが、図示の機関はLPG等の小形ガス機関において
、スロットル弁1及び過給機2を有する。機関3には吸
気弁4、排気弁5、ピストン6があり、吸気弁4に連通
ずる吸気通路71こは、前記スロットル弁1、キャブレ
ター8が連設され、キャブレター8にはガスタンク(図
示せず〕よりの連通管が臨設している。排気通路9に連
通す排気通路9と前記吸気通路7のそれぞれの端部には
過給機2が両管を跨設してSす、過給機2の吸気通路7
側にはブロア10を、排気通路9側にはタービン11を
設け、ブロア1oは吸気人口12、タービン11は排気
管13を設けている。Hereinafter, the configuration of the present invention will be explained based on examples. Second
The figure shows a first embodiment of the present invention, and FIG. 3 shows a second embodiment. The illustrated engine is a small gas engine such as LPG, and has a throttle valve 1 and a supercharger 2. The engine 3 includes an intake valve 4, an exhaust valve 5, and a piston 6. An intake passage 71 communicating with the intake valve 4 is connected to the throttle valve 1 and a carburetor 8, and the carburetor 8 has a gas tank (not shown). ] At each end of the exhaust passage 9 and the intake passage 7, which communicate with the exhaust passage 9, a supercharger 2 is installed straddling both pipes. 2 intake passage 7
A blower 10 is provided on the side, a turbine 11 is provided on the exhaust passage 9 side, the blower 1o is provided with an intake port 12, and the turbine 11 is provided with an exhaust pipe 13.
以上は通常のスロットル弁1を有する過給機付ガス機関
の構造であるが、本発明はこの構造に、排気通路9と排
気管13とをバイパス14で連通し、バイパス14途中
に、ダイアフラム16を有する制御弁15を介在し、該
制御弁15の開閉により、バイパス14を流れる排気ガ
スの量を制御し、タービン11に供給する排気ガスを調
節している。The above is the structure of a supercharged gas engine having a normal throttle valve 1, but the present invention has this structure in which the exhaust passage 9 and the exhaust pipe 13 are connected through a bypass 14, and a diaphragm 16 is installed in the middle of the bypass 14. By opening and closing the control valve 15, the amount of exhaust gas flowing through the bypass 14 is controlled, and the exhaust gas supplied to the turbine 11 is regulated.
制御弁15にはダイアフラム16及びバネ17を内蔵し
、弁体18の出没を制御する。ダイアフラム16の上室
19(バネ17を有する側)は前記スロットル弁lの下
流圧を、ダイアフラム下室20はスロットル弁1の上流
圧を導管21.22でもって導いている。導管21の途
中には3方弁23を設け、該3方弁23の一端は吸気人
口12に連通している。すなわち、大気圧に開放してい
る。The control valve 15 has a built-in diaphragm 16 and a spring 17 to control the protrusion and retraction of the valve body 18. The upper chamber 19 of the diaphragm 16 (the side with the spring 17) carries the downstream pressure of the throttle valve I, and the lower diaphragm chamber 20 carries the upstream pressure of the throttle valve 1 through a conduit 21.22. A three-way valve 23 is provided in the middle of the conduit 21, and one end of the three-way valve 23 communicates with the intake port 12. That is, it is open to atmospheric pressure.
以上のような構成からなる本実施例では、低負荷時(こ
+1、スロットル弁1が閉じる傾向ζこなり、スロット
ル弁1の下流圧が低下し、上室19の圧力を減少するの
で、ダイアフラム16は図中上方に上昇し、弁体18を
開き、排気ガスをバイパス14に大量流すことにより、
過、給機2のタービン11の回転を落とす。In this embodiment configured as described above, when the load is low (1), the throttle valve 1 tends to close, the downstream pressure of the throttle valve 1 decreases, and the pressure in the upper chamber 19 decreases, so that the diaphragm 16 rises upward in the figure, opens the valve body 18, and allows a large amount of exhaust gas to flow into the bypass 14.
Then, the rotation of the turbine 11 of the feeder 2 is reduced.
また、高負荷時には、スロットル弁1が開き勝手となっ
て、スロットル弁lの下流圧は上昇し、上室19及び下
室20の圧力はバランスするので、バネ17によって、
弁体18は閉じ、排気ガスはバイパス14に流れず、過
給機2のタービン11の回転は上昇する。Also, when the load is high, the throttle valve 1 opens freely, the downstream pressure of the throttle valve 1 increases, and the pressures in the upper chamber 19 and lower chamber 20 are balanced, so the spring 17
The valve body 18 is closed, the exhaust gas does not flow to the bypass 14, and the rotation of the turbine 11 of the supercharger 2 increases.
ところが、スロットル弁1の下流側に圧力センサー24
を設けているので、該センサー24より得られた信号を
コントローラ25でもって設定値か否か調整し、この信
号でもって3方弁23を制御する。しし、スロットル弁
1の下流圧が設定値以上では制御弁15の上室19を大
気開放またはスロットル弁1の適当する下流圧に応じた
圧力とし、弁体18を開き、過給機のタービン11の回
転を落とす。その結果、過給圧を必要以上に上げないよ
うにして、サージングを回避している。However, there is a pressure sensor 24 on the downstream side of the throttle valve 1.
Since the controller 25 is provided with a signal obtained from the sensor 24, the controller 25 adjusts whether the signal is at the set value or not, and the three-way valve 23 is controlled using this signal. However, if the downstream pressure of the throttle valve 1 is higher than the set value, the upper chamber 19 of the control valve 15 is opened to the atmosphere or set to a pressure corresponding to the appropriate downstream pressure of the throttle valve 1, the valve body 18 is opened, and the turbine of the supercharger is opened. Reduce the rotation of 11. As a result, the boost pressure is not increased more than necessary to avoid surging.
第3図は第2の実施例で、第2図と同一部分または均等
部分は同一符号で示し、その説明を省略しているが、吸
気通路7と吸気人口12に連設した吸気管26とをバイ
パス14でもって連通し、該バイパス14に制御弁15
を介在させている。FIG. 3 shows a second embodiment, in which the same parts or equivalent parts as in FIG. are connected through a bypass 14, and a control valve 15 is connected to the bypass 14.
is interposed.
制御弁15の上室19のみにスロットル弁1の下流圧を
導管21でもって導いて8つ、過給圧を吸気口12に還
流することにより、第1の実施例と同様、低負荷時及び
高負荷時には、必要以上に過給空気を上げないようにし
て、サージングを回避している。By guiding the downstream pressure of the throttle valve 1 only to the upper chamber 19 of the control valve 15 through the conduit 21 and returning the supercharging pressure to the intake port 12, it is possible to reduce the pressure during low load and During high loads, the supercharged air is not increased more than necessary to avoid surging.
以上、本発明によれば、第4図の過給気作動線図に示す
ように、サージング線すの右側に位置し過給機の不都合
を回避している。なgS第5図は負荷−制御弁リフトダ
イアフラム圧力差グラフで本発明はこのようにして制御
される。As described above, according to the present invention, as shown in the supercharging operation diagram in FIG. 4, the supercharger is located on the right side of the surging line, thereby avoiding the inconvenience of the supercharger. FIG. 5 is a load-control valve lift diaphragm pressure difference graph, and the present invention is controlled in this way.
以上要するに本発明は、スロットル弁を有する過給機付
内燃機関に8いて、該スロットル弁の下流圧によって、
給気圧を制御し、機関低負荷及び高負荷時のサージング
を回避した過給気付内燃機関であるから、サージングを
回避しながら、低負荷での燃費を改善し、量産された過
給機を採用でき、安価でかつ高出力機関とすることがで
きる。In summary, the present invention provides a supercharged internal combustion engine having a throttle valve, and uses downstream pressure of the throttle valve to
Since it is a supercharged internal combustion engine that controls air pressure and avoids surging at low and high engine loads, it improves fuel efficiency at low loads while avoiding surging, and uses a mass-produced supercharger. It is possible to produce a low-cost, high-output engine.
第1図は一般の過給気作動線図、第2図は本発明の第1
の実施例の概念図、第3図は第2の実施例の概念図、第
4図は本発明による過給気作動線図、第5図は負荷−制
御弁リフトダイアフラム圧力差グラフを示す。
1・・・スロットル弁、°2・・・過給機、7・・・給
気通路、14・・・バイパス、15・・・制御弁、16
・・・ダイヤフラム、18・・・弁体
代理人 弁理士 岡 部 吉 彦第1図
5
第3図Figure 1 is a general supercharging operation diagram, Figure 2 is the first diagram of the present invention.
FIG. 3 is a conceptual diagram of the second embodiment, FIG. 4 is a supercharging operation diagram according to the present invention, and FIG. 5 is a load-control valve lift diaphragm pressure difference graph. 1... Throttle valve, °2... Supercharger, 7... Air supply passage, 14... Bypass, 15... Control valve, 16
...Diaphragm, 18...Patent attorney Yoshihiko Okabe Figure 1 5 Figure 3
Claims (1)
ロットル弁の下流圧によって、給気圧を制御し、機関低
負荷及び高負荷時のサージング回避装置。A surging avoidance device for a supercharged internal combustion engine having a throttle valve, which controls supply pressure by the downstream pressure of the throttle valve, and when the engine is under low load or high load.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57148292A JPS5937226A (en) | 1982-08-25 | 1982-08-25 | Surge avoiding device of internal combustion engine equipped with supercharger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57148292A JPS5937226A (en) | 1982-08-25 | 1982-08-25 | Surge avoiding device of internal combustion engine equipped with supercharger |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5937226A true JPS5937226A (en) | 1984-02-29 |
Family
ID=15449508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57148292A Pending JPS5937226A (en) | 1982-08-25 | 1982-08-25 | Surge avoiding device of internal combustion engine equipped with supercharger |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5937226A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2569770A1 (en) * | 1984-08-31 | 1986-03-07 | Suzuki Motor Co | DEVICE FOR CONTROLLING THE BOOSTER PRESSURE OF A BOOSTER ENGINE |
JPH0158723U (en) * | 1987-10-09 | 1989-04-12 | ||
KR20040074233A (en) * | 2003-02-17 | 2004-08-25 | 현대자동차주식회사 | Turbo charger pressure control apparatus and control method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56522A (en) * | 1979-06-12 | 1981-01-07 | Daihatsu Motor Co Ltd | Exhaust turbo supercharging type engine |
JPS578321B2 (en) * | 1973-02-20 | 1982-02-16 |
-
1982
- 1982-08-25 JP JP57148292A patent/JPS5937226A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS578321B2 (en) * | 1973-02-20 | 1982-02-16 | ||
JPS56522A (en) * | 1979-06-12 | 1981-01-07 | Daihatsu Motor Co Ltd | Exhaust turbo supercharging type engine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2569770A1 (en) * | 1984-08-31 | 1986-03-07 | Suzuki Motor Co | DEVICE FOR CONTROLLING THE BOOSTER PRESSURE OF A BOOSTER ENGINE |
JPH0158723U (en) * | 1987-10-09 | 1989-04-12 | ||
KR20040074233A (en) * | 2003-02-17 | 2004-08-25 | 현대자동차주식회사 | Turbo charger pressure control apparatus and control method thereof |
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