JPH073006Y2 - Internal combustion engine intake system - Google Patents
Internal combustion engine intake systemInfo
- Publication number
- JPH073006Y2 JPH073006Y2 JP1987137262U JP13726287U JPH073006Y2 JP H073006 Y2 JPH073006 Y2 JP H073006Y2 JP 1987137262 U JP1987137262 U JP 1987137262U JP 13726287 U JP13726287 U JP 13726287U JP H073006 Y2 JPH073006 Y2 JP H073006Y2
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- enriched air
- air
- passage
- engine
- 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.)
- Expired - Lifetime
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Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は酸素富化空気を燃焼室に供給する内燃機関の吸
気装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an intake device for an internal combustion engine that supplies oxygen-enriched air to a combustion chamber.
（従来の技術） 内燃機関に供給する空気は、総てが燃料の燃焼に寄与す
るわけではなく、空気中に含まれている約20％の酸素が
燃料を燃焼させるに過ぎず、残りを占める約80％の窒素
は排気ガスとしてそのまま外部に排出されてしまう。(Prior Art) Not all the air supplied to the internal combustion engine contributes to the combustion of fuel, but only about 20% of oxygen contained in the air burns the fuel and occupies the rest. About 80% of nitrogen is exhausted to the outside as exhaust gas.
したがって燃焼に必要な酸素のみを供給するようにすれ
ば、エンジンの小型化や振動の低減等に大きなメリット
をもたらすが、反面酸素供給装置の設置などコスト的に
もスペース的にも解決すべき課題が多く、このような方
式は理論的には成立しても実用化は極めて困難であると
言えよう。Therefore, supplying only the oxygen necessary for combustion brings great advantages to downsizing of the engine and reduction of vibration, but on the other hand, problems such as installation of oxygen supply device should be solved in terms of cost and space. However, even if such a method is theoretically established, it is extremely difficult to put it into practical use.
ところで空気中の酸素濃度を高めるものとして酸素富化
膜が知られている。これは有機高分子の素材からなる非
多孔質膜を用いて、膜内を通過する際の酸素と窒素の透
過性の差を利用し、透過空気中に含まれる酸素の濃度を
高めるものである（例えば「工業加熱」61年９月号及び
10月号《酸素富化膜の開発とその燃焼システムへの応
用》等参照）。By the way, an oxygen-enriched film is known to increase the oxygen concentration in the air. This is to increase the concentration of oxygen contained in the permeated air by using a non-porous membrane made of organic polymer material and utilizing the difference in permeability between oxygen and nitrogen when passing through the membrane. (For example, “Industrial heating” September 1986 issue and
See the October issue "Development of oxygen-enriched membranes and their application to combustion systems").
そこで、本出願人により実開昭61−49063号公報にもあ
るように、エンジンに供給する空気の一部を、酸素富化
装置を通して酸素濃度を高めた状態でタンクに蓄えてお
き、特定の運転状態時にこの蓄えられた酸素富化空気を
供給することにより、エンジンの燃焼改善等を図るよう
にした装置も提案されている。Therefore, as disclosed in Japanese Utility Model Laid-Open No. 61-49063 by the present applicant, a part of the air supplied to the engine is stored in a tank in a state where the oxygen concentration is increased through an oxygen enrichment device, and a specific amount of air is stored. There is also proposed a device that improves the combustion of the engine by supplying the stored oxygen-enriched air during operation.
（考案が解決しようとする問題点） ところで燃焼時に発生するNOxを低減するために、排気
ガスの一部を吸気中に還流することにより燃焼温度を下
げるEGRが知られている。(Problems to be solved by the invention) By the way, in order to reduce NOx generated during combustion, EGR is known in which a part of exhaust gas is recirculated into intake air to lower the combustion temperature.
ところがこのEGRを行うことにより不完全燃焼に基づく
排気中のパーティキュレイトが増加する傾向があり、エ
ンジン高負荷域では燃料噴射量の増大に伴いもともとパ
ーティキュレイトが多くなることから、EGRの限界負荷
域を比較的低く抑えざるを得なかった。However, performing this EGR tends to increase the particulate matter in the exhaust gas due to incomplete combustion, and in the high engine load range, the amount of particulate matter originally increases with the increase in the fuel injection amount. The load range had to be kept relatively low.
またパーティキュレイトの多く含まれる排気ガスを吸気
中に還流すると、還流通過を含めて吸気系がパーティキ
ュレイトにより汚損され、還流量を制御するバルブの作
動不良等を引き起こし、さらにはシリンダ内のオイルを
劣化させたりピストンリングの摩耗を早める等の原因に
もなった。When exhaust gas containing a large amount of particulates is recirculated into the intake air, the intake system including the passage of the recirculation is polluted by the particulates, causing malfunction of the valve that controls the recirculation amount, and further This also caused deterioration of the oil and accelerated wear of the piston ring.
ところで前記酸素富化装置において、酸素富化膜を透過
した空気は酸素濃度が高くなるが、この反面酸素富化膜
を透過しなかった空気は酸素濃度が低く窒素濃度の高い
空気となる。By the way, in the oxygen enrichment apparatus, the air that has permeated the oxygen enriched film has a high oxygen concentration, while the air that has not permeated the oxygen enriched film has a low oxygen concentration and a high nitrogen concentration.
酸素濃度の高い酸素富化空気をエンジンに供給すると、
燃焼の改善によりスモークの低減等が得られるものの、
低負荷域等では燃焼温度の上昇によるNOxの増加が見ら
れ、これに対して窒素濃度の高い窒素富化空気を供給す
ると、燃焼に寄与しない不活性な成分である窒素が多い
ことから、燃焼抑制効果があり、NOxの低減効果が見ら
れる。Supplying oxygen-enriched air with high oxygen concentration to the engine,
Although reduction of smoke can be obtained by improving combustion,
In the low load region, etc., NOx increases due to the rise in combustion temperature. On the other hand, when nitrogen-enriched air with a high nitrogen concentration is supplied, there is much nitrogen, which is an inactive component that does not contribute to combustion. There is a suppressing effect, and a NOx reducing effect can be seen.
そこで本考案は、酸素富化空気と窒素富化空気とを選択
的にエンジンに供給することにより、低中負荷域でのNO
x低減と、高負荷域でのスモーク低減とを、吸気系をパ
ーティキュレイトで汚損することなく実現できるように
した装置を提供することを目的とする。Therefore, the present invention selectively supplies oxygen-enriched air and nitrogen-enriched air to the engine to reduce NO in the low and medium load range.
An object of the present invention is to provide a device capable of reducing x and reducing smoke in a high load region without polluting the intake system with particulates.
（問題点を解決するための手段） 本考案は、ターボチャージャからの加圧空気を酸素富化
装置に導入し、この酸素富化装置から酸素富化空気を取
り出す通路と、窒素富化空気を取り出す通路とを、切換
弁を介して選択的にエンジンの吸気通路に接続し、前記
酸素富化空気を取り出す通路の途中に酸素富化空気を加
圧するポンプと、加圧された酸素富化空気を貯溜するタ
ンクとを接続する一方、運転状態を検出する手段からの
信号に基づき比較的高負荷の運転域では前記タンクから
の酸素富化空気を、比較的低負荷の運転域では窒素富化
空気を、機関に供給するように前記切換弁を制御する制
御回路を設けた。(Means for Solving Problems) The present invention introduces pressurized air from a turbocharger into an oxygen enriching device, and a passage for taking out oxygen enriched air from the oxygen enriching device and a nitrogen enriched air A passage for taking out the gas is selectively connected to an intake passage of the engine through a switching valve, a pump for pressurizing the oxygen-enriched air in the middle of the passage for taking out the oxygen-enriched air, and the pressurized oxygen-enriched air. While connecting to a tank that stores the oxygen, the oxygen-enriched air from the tank is enriched in a relatively high load operation area and the nitrogen is enriched in a relatively low load operation area based on a signal from a means for detecting an operating state. A control circuit is provided to control the switching valve to supply air to the engine.
（作用） ターボチャージャで加圧された空気が酸素富化装置を透
過することにより、酸素濃度の高い酸素富化空気とな
り、他方、透過しなかった空気は相対的に窒素濃度の高
い窒素富化空気となる。(Function) The air pressurized by the turbocharger passes through the oxygen enriching device to become oxygen-enriched air with high oxygen concentration, while the air that has not passed through is enriched with nitrogen with relatively high nitrogen concentration. It becomes air.
エンジンの低中負荷域等では切換弁を切換え、燃焼に寄
与しない不活性成分の多い窒素負荷空気をエンジンに供
給することにより、燃焼を抑制してNOxの低減を図る。
この場合、NOxを低減するのに排気還流を必要ないの
で、吸気系がパーティキュレイトにより汚損されること
もない。In the low and medium load areas of the engine, the switching valve is switched to supply nitrogen-loaded air with a large amount of inert components that do not contribute to combustion to suppress combustion and reduce NOx.
In this case, since exhaust gas recirculation is not required to reduce NOx, the intake system is not polluted by particulates.
これに対して高負荷域ではポンプによりタンクに貯溜し
た酸素濃度の高い酸素富化空気を機関に供給することに
より、燃料の完全燃焼を促してスモークの発生量を減少
させ、同時に出力や燃費を向上させる。タンクには比較
的低負荷の運転状態のときに十分な量の酸素富化空気が
蓄えられるているので、急加速時など急激な負荷の増大
があっても確実に酸素富化空気を供給して良好な出力性
能を発揮させられる。On the other hand, in the high load region, oxygen enriched air with high oxygen concentration stored in the tank by the pump is supplied to the engine to promote complete combustion of the fuel and reduce the amount of smoke generated, while at the same time reducing the output and fuel consumption. Improve. A sufficient amount of oxygen-enriched air is stored in the tank when operating under a relatively low load, so it is possible to reliably supply oxygen-enriched air even when there is a sudden increase in load such as during sudden acceleration. And good output performance.
（実施例） 本考案の実施例を図面に基づいて説明する。(Example) The Example of this invention is described based on drawing.
第１図において、１はエンジン、２は吸気通路、３は排
気通路、４はターボチャージであり、ターボチャージャ
４は排気通路３を流れる排気ガスの圧力で回転するター
ビン4Aによりコンプレッサ4Bを駆動し、吸気通路２に圧
縮空気を送り込む。In FIG. 1, 1 is an engine, 2 is an intake passage, 3 is an exhaust passage, 4 is a turbocharge, and a turbocharger 4 drives a compressor 4B by a turbine 4A rotating by the pressure of exhaust gas flowing through the exhaust passage 3. , Compressed air is fed into the intake passage 2.
ターボチャージャ４の下流にはインタークーラ５が設置
され、酸素富化装置６に導入される加圧空気を、酸素富
化装置６の適正作動範囲である、少なくとも60℃以下に
冷却する。An intercooler 5 is installed downstream of the turbocharger 4 and cools the pressurized air introduced into the oxygen enriching device 6 to at least 60 ° C., which is the proper operating range of the oxygen enriching device 6.
酸素富化装置６は内部に酸素富化膜6Aを備え、入口部6B
から導入されて酸素富化膜6Aを透過した酸素濃度の高い
酸素富化空気を出口部6Cから酸素富化通路７に導き、酸
素富化膜6Aを透過しない窒素濃度の高い窒素富化空気は
他の出口部6Dから窒素富化空気通路８へと導く。The oxygen enrichment device 6 is provided with an oxygen enrichment film 6A inside and an inlet portion 6B.
Oxygen-enriched air having a high oxygen concentration introduced from the above and permeated through the oxygen-enriched film 6A is guided from the outlet 6C to the oxygen-enriched passage 7, and the nitrogen-enriched air with a high nitrogen concentration that does not pass through the oxygen-enriched film 6A is The other outlet 6D leads to the nitrogen-enriched air passage 8.
酸素富化通路７はポンプ10を介してタンク９に接続し、
また窒素富化通路８も同じくタンク11に接続する。さら
に酸素富化通路７と窒素富化通路８からそれぞれ分岐し
た通路7A、8Aは切換弁12を介して選択的に吸気通路２に
連通接続される。The oxygen enrichment passage 7 is connected to the tank 9 via the pump 10,
The nitrogen enrichment passage 8 is also connected to the tank 11. Further, the passages 7A and 8A branched from the oxygen-enriched passage 7 and the nitrogen-enriched passage 8 are selectively connected to the intake passage 2 via a switching valve 12.
前記ポンプ10は酸素富化空気のタンク９の圧力が所定値
よりも低下したときに作動する圧力スイッチ13により、
モータ14がポンプ10を回転駆動するようにバッテリ15に
対して回路接続される。なお、16はエンジンキースイッ
チである。The pump 10 has a pressure switch 13 which is activated when the pressure of the oxygen-enriched air tank 9 drops below a predetermined value.
The motor 14 is circuit-connected to the battery 15 so as to drive the pump 10 to rotate. Reference numeral 16 is an engine key switch.
また窒素富化空気のタンク11にはリリーフバルブ17が設
置してあり、タンク11の内圧が所定の高圧に達した時に
一部をリリーフする。Further, a relief valve 17 is installed in the tank 11 for nitrogen-enriched air, and a part of the tank 11 is relieved when the internal pressure of the tank 11 reaches a predetermined high pressure.
分岐通路7Aと8Aとを選択的に切換える切換弁12は、コン
トローラ18からの信号により切換動作する。コントロー
ラ18にはエンジン運転状態を検出する信号として、回転
数信号や負荷信号が入力し、これらに基づいて第２図に
も示す通り、低中負荷域では窒素富化空気をエンジンに
供給し、高負荷域では酸素富化空気を同じく供給するよ
うに切換弁12を切換作動させる。The switching valve 12 that selectively switches between the branch passages 7A and 8A performs switching operation according to a signal from the controller 18. A rotation speed signal and a load signal are input to the controller 18 as a signal for detecting an engine operating state, and based on these signals, nitrogen-enriched air is supplied to the engine in a low and medium load range as shown in FIG. In the high load region, the switching valve 12 is switched so that the oxygen-enriched air is also supplied.
以上のように構成され、次ぎに作用について説明する。It is configured as described above, and the operation will be described below.
ターボチャージャ４の作動により加圧された空気はイン
タークーラ５を通過することにより冷却作用を受け、酸
素富化装置６が適正に作動する60℃以下になる。酸素富
化装置６の入口部6Bから導入された高圧低温の空気は、
酸素富化膜6Aを透過することにより酸素濃度の高い酸素
富化空気となり、出口部6Cから酸素富化通路７を経由し
てタンク９、または分岐通路7Aを経由してエンジン１
へ、また酸素富化膜6Aを透過しない相対的に窒素濃度の
高い窒素富化空気は、出口部6Dから窒素富化通路８を経
てタンク11、または分岐通路8Aを経てエンジン１に送り
込まれる。The air pressurized by the operation of the turbocharger 4 is cooled by passing through the intercooler 5, and the temperature becomes 60 ° C. or lower at which the oxygen enrichment device 6 operates properly. The high-pressure low-temperature air introduced from the inlet portion 6B of the oxygen enrichment device 6 is
By passing through the oxygen-enriching membrane 6A, oxygen-enriched air having a high oxygen concentration is obtained, and the engine 1 is passed from the outlet 6C via the oxygen-enriching passage 7 to the tank 9 or via the branch passage 7A.
Further, the nitrogen-enriched air having a relatively high nitrogen concentration which does not pass through the oxygen-enriched film 6A is sent to the engine 1 from the outlet 6D via the nitrogen-enriched passage 8 or the tank 11 or the branched passage 8A.
切換弁12はコントローラ18からの信号に従い、エンジン
低中負荷域では窒素富化空気が送り込まれる分岐通路8A
を吸気通路２と連通接続し、窒素濃度の高い空気をエン
ジン１に供給する。The switching valve 12 follows the signal from the controller 18, and the branch passage 8A into which the nitrogen-enriched air is sent in the engine low and medium load range.
Is connected to the intake passage 2 to supply air having a high nitrogen concentration to the engine 1.
燃焼に寄与しない不活性な成分が多い窒素富化空気を供
給することにより、燃焼が抑制され、従来のように排気
還流をしなくてもNOxの発生が低減し、また吸気系が還
流排気に含まれるパーティキュレイトにより汚損される
こともない。By supplying nitrogen-enriched air that has many inert components that do not contribute to combustion, combustion is suppressed, NOx generation is reduced even without exhaust gas recirculation as in the past, and the intake system becomes recirculation exhaust gas. It will not be polluted by the included particulates.
なお、低中負荷域では燃料の噴射量が少ないため、窒素
富化空気を供給しても酸素の絶対量が不足することはな
く、出力や燃費の悪化はない。Since the fuel injection amount is small in the low to medium load range, the absolute amount of oxygen will not be insufficient even if nitrogen-enriched air is supplied, and the output and fuel consumption will not deteriorate.
これに対してエンジン高負荷域では切換弁12は酸素富化
空気が吸気通路２に導入されるように切換作動する。燃
料の噴射量が増大する高負荷域ではスモークの発生量が
増えるのであるが、窒素富化空気に比較して著しく酸素
濃度の高い酸素富化空気が供給されるので、増加した燃
料と結び付く酸素の増大により不完全燃焼を防ぎ、出力
や燃費の改善と共にスモークの発生量を低減することが
できるのである。On the other hand, in the high engine load region, the switching valve 12 performs switching operation so that oxygen-enriched air is introduced into the intake passage 2. The amount of smoke generated increases in the high load region where the fuel injection amount increases, but since oxygen-enriched air having a significantly higher oxygen concentration than that of nitrogen-enriched air is supplied, the oxygen associated with the increased fuel is increased. It is possible to prevent incomplete combustion, improve output and fuel consumption, and reduce the amount of smoke generated.
また、加速時など急激に吸入空気量が増加するときで
も、タンク９に蓄えられた酸素富化空気を放出するの
で、一時的にせよ供給不足を生じるようなことはなく、
良好な加速の立ち上がり特性を発揮することができる。Further, even when the intake air amount suddenly increases such as during acceleration, the oxygen-enriched air stored in the tank 9 is released, so that a temporary supply shortage does not occur.
A good acceleration rising characteristic can be exhibited.
ところで、酸素富化膜6Aを透過する酸素富化空気の濃度
と透過量は、酸素富化膜6Aの上流と下流の圧力差に比例
するので、下流側からポンプ10により吸引することによ
り、タンク９に蓄えられる酸素富化空気量を増加させる
ことができ、この場合、ポンプ10の作動はタンク９内の
蓄圧値に応じて圧力スイッチ13により制御されるから、
常に一定以上の酸素富化空気が蓄えられる。By the way, the concentration and the amount of permeation of the oxygen-enriched air that permeates the oxygen-enriched film 6A are proportional to the pressure difference between the upstream and the downstream of the oxygen-enriched film 6A. The amount of oxygen-enriched air stored in 9 can be increased, and in this case, the operation of the pump 10 is controlled by the pressure switch 13 according to the accumulated pressure value in the tank 9,
A certain amount of oxygen-enriched air is always stored.
自動車用エンジンは低中負荷域での使用頻度が高いた
め、窒素富化空気がエンジン１に供給されている際にタ
ンク９に酸素富化空気を蓄えることができ、したがって
酸素富化装置６をそれほど大型化しなくても、十分に実
用に供することができる。Since the automobile engine is frequently used in the low and medium load range, the oxygen-enriched air can be stored in the tank 9 while the nitrogen-enriched air is being supplied to the engine 1. Even if the size is not so large, it can be sufficiently put to practical use.
酸素富化空気に比較して多くエンジン１に供給される窒
素富化空気は、ターボチャージャ４から送り込まれる加
圧空気のうちから酸素富化空気を差し引いた残りであっ
て、ターボチャージャ４の容量を適切に設定しておきさ
えすれば、エンジン１に対する供給が不足することはな
い。また高負荷域で酸素富化空気に切換えられていると
きは、むしろタンク11の蓄えが過剰になることもあり、
このときはリリーフバルブ17が開いて余剰空気を外部に
排出する。The nitrogen-enriched air supplied to the engine 1 in a larger amount than the oxygen-enriched air is the remainder of the pressurized air sent from the turbocharger 4 after subtracting the oxygen-enriched air, and the capacity of the turbocharger 4 is reduced. The supply to the engine 1 will not run short as long as is set appropriately. Also, when switching to oxygen-enriched air in the high load area, the storage in tank 11 may rather become excessive,
At this time, the relief valve 17 is opened to discharge the excess air to the outside.
（考案の効果） 以上のように本考案によれば、エンジンの低中負荷域等
では燃焼に寄与しない不活性成分の多い窒素負荷空気を
エンジンに供給することにより、燃焼を抑制してNOxの
低減を図ることができ、この場合NOxを低減するのに排
気還流を必要としないので、吸気系がパーティキュレイ
トにより汚損されることもない。そして高負荷域では酸
素濃度の高い酸素富化空気に切換えることにより、燃料
の完全燃焼を促進してスモークの発生を減少させ、同時
に出力や燃費を向上させることができる。特に本考案で
は、酸素富化空気を使用しない比較的低負荷の運転状態
のときにタンクに貯溜しておいた酸素富化空気を高負荷
運転時に放出するようにしたことから、急加速時など負
荷が急激に増大する運転条件下においても確実に必要な
量の酸素富化空気を供給して良好な出力性能を確保でき
る。(Effect of the Invention) As described above, according to the present invention, by supplying the engine with nitrogen-laden air having a large amount of inert components that do not contribute to combustion in the low and medium load regions of the engine, the combustion is suppressed and NOx It can be reduced, and in this case, exhaust gas recirculation is not required to reduce NOx, so that the intake system is not polluted by particulates. In the high load region, by switching to oxygen-enriched air having a high oxygen concentration, complete combustion of fuel can be promoted to reduce smoke generation, and at the same time, output and fuel consumption can be improved. In particular, in the present invention, the oxygen-enriched air stored in the tank is released during high-load operation when operating under relatively low load without using oxygen-enriched air. Even under operating conditions where the load increases rapidly, it is possible to reliably supply the required amount of oxygen-enriched air and ensure good output performance.
第１図は本考案の実施例を示す構成図、第２図は同じく
その制御特性図である。 １…エンジン、２…吸気通路、３…排気通路、４…ター
ボチャージャ、６…酸素富化装置、７…酸素富化通路、
８…窒素富化通路、9,11…タンク、12…切換弁、18…コ
ントローラ。FIG. 1 is a configuration diagram showing an embodiment of the present invention, and FIG. 2 is a control characteristic diagram thereof. 1 ... Engine, 2 ... Intake passage, 3 ... Exhaust passage, 4 ... Turbocharger, 6 ... Oxygen enriching device, 7 ... Oxygen enriching passage,
8 ... Nitrogen enriched passage, 9, 11 ... Tank, 12 ... Switching valve, 18 ... Controller.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 北村 文章 埼玉県上尾市大字壱丁目１番地 日産ディ ーゼル工業株式会社内 (72)考案者 新村 恵一 埼玉県上尾市大字壱丁目１番地 日産ディ ーゼル工業株式会社内 (72)考案者 中村 秀一 埼玉県上尾市大字壱丁目１番地 日産ディ ーゼル工業株式会社内 (56)参考文献 実開 昭59−142461（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, written by Kitamura, 1-chome, Ii-chome, Ageo-shi, Saitama, Nissan Diesel Industry Co., Ltd. (72) Keiichi Niimura, 1-chome, Io-chome, Ageo, Saitama Prefecture Incorporated (72) Inventor Shuichi Nakamura 1-chome, Ichome, Ageo City, Saitama Prefecture Nissan Diesel Industry Co., Ltd. (56) Bibliographic references Sho 59-142461 (JP, U)
Claims (1)
化装置に導入し、この酸素富化装置から酸素富化空気を
取り出す通路と、窒素富化空気を取り出す通路とを、切
換弁を介して選択的にエンジンの吸気通路に接続し、前
記酸素富化空気を取り出す通路の途中に酸素富化空気を
加圧するポンプと、加圧された酸素富化空気を貯溜する
タンクとを接続する一方、運転状態を検出する手段から
の信号に基づき比較的高負荷の運転域では前記タンクか
らの酸素富化空気を、比較的低負荷の運転域では窒素富
化空気を、機関に供給するように前記切換弁を制御する
制御回路を設けたことを特徴とする内燃機関の吸気装
置。1. A passage for introducing pressurized air from a turbocharger into an oxygen-enriching device and taking out oxygen-enriched air from the oxygen-enriching device and a passage for taking out nitrogen-enriched air via a switching valve. Selectively and selectively connected to the intake passage of the engine, and a pump for pressurizing the oxygen-enriched air and a tank for storing the pressurized oxygen-enriched air are connected in the middle of the passage for extracting the oxygen-enriched air. In order to supply the engine with oxygen-enriched air from the tank in a relatively high-load operating region and nitrogen-enriched air in a relatively low-load operating region based on a signal from a means for detecting an operating state. An intake system for an internal combustion engine, comprising a control circuit for controlling the switching valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987137262U JPH073006Y2 (en) | 1987-09-08 | 1987-09-08 | Internal combustion engine intake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987137262U JPH073006Y2 (en) | 1987-09-08 | 1987-09-08 | Internal combustion engine intake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6441659U JPS6441659U (en) | 1989-03-13 |
| JPH073006Y2 true JPH073006Y2 (en) | 1995-01-30 |
Family
ID=31398527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987137262U Expired - Lifetime JPH073006Y2 (en) | 1987-09-08 | 1987-09-08 | Internal combustion engine intake system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073006Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4735390B2 (en) * | 2006-04-20 | 2011-07-27 | いすゞ自動車株式会社 | Supercharged internal combustion engine with oxygen enrichment device |
| DE102008018522A1 (en) * | 2008-04-12 | 2009-10-15 | Man Diesel Se | Supercharged internal-combustion engine i.e. large- or marine diesel engine, has nitrogen inlets for supplying nitrogen into combustion air for engine and connected with nitrogen supplying device |
| JP6572939B2 (en) * | 2017-05-19 | 2019-09-11 | トヨタ自動車株式会社 | Gas supply device for internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142461U (en) * | 1983-03-15 | 1984-09-22 | 三菱自動車工業株式会社 | Vehicle engine with oxygen enrichment device |
-
1987
- 1987-09-08 JP JP1987137262U patent/JPH073006Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6441659U (en) | 1989-03-13 |
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