JPS5840005B2 - Intake system for supercharged engines - Google Patents
Intake system for supercharged enginesInfo
- Publication number
- JPS5840005B2 JPS5840005B2 JP56117972A JP11797281A JPS5840005B2 JP S5840005 B2 JPS5840005 B2 JP S5840005B2 JP 56117972 A JP56117972 A JP 56117972A JP 11797281 A JP11797281 A JP 11797281A JP S5840005 B2 JPS5840005 B2 JP S5840005B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- intake passage
- intake
- fuel
- supercharged
- 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
Links
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
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
-
- 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)
Description
【発明の詳細な説明】 本発明は過給機付エンジンの改良に関する。[Detailed description of the invention] The present invention relates to improvements in supercharged engines.
従来より、主吸気通路に加えて補助吸気通路を設け、主
吸気通路からの自然吸気に加えて、エンジンの出力軸あ
るいは排気ガスにより駆動される過給機によって加圧し
た空気若しくは混合気を過給気として補助的に補助吸気
通路から燃焼室内に世給することにより、エンジンに対
する充填効率を向上させ、エンジンの出力性能の向上を
図るようにしたエンジンの過給装置は公知である。Conventionally, an auxiliary intake passage has been provided in addition to the main intake passage, and in addition to the natural intake from the main intake passage, air or air mixture pressurized by a supercharger driven by the engine's output shaft or exhaust gas is supercharged. 2. Description of the Related Art A supercharging device for an engine is known in which the charging efficiency of the engine is improved by supplementally supplying air into the combustion chamber from an auxiliary intake passage, thereby improving the output performance of the engine.
しかし、過給機は外部空気を断熱圧縮して過給気として
吐出するので過給気の温度は高温となり主吸気通路から
の混合気とエンジンの作動室（燃焼室）内において混合
されるときに局部的に高温領域が発生し、ノッキングを
起こしやすい状態になっていた。However, since a supercharger adiabatically compresses external air and discharges it as supercharged air, the temperature of the supercharged air becomes high and when it mixes with the air-fuel mixture from the main intake passage in the working chamber (combustion chamber) of the engine. Localized high-temperature areas occurred in the engine, making it susceptible to knocking.
また高温になれば気体の体積は膨張するので充填効率に
も限界があった。Furthermore, since the volume of the gas expands when the temperature rises, there is a limit to the filling efficiency.
従来、過給気を冷却するものとしては過給気通路にクー
ラーを装着したものが知られている（たとえば特開昭５
ｌ−７４１０９）が、この種のものは冷却装置が大型で
あるとともに高価である欠点があった。Conventionally, as a device for cooling supercharging air, it is known that a cooler is installed in the supercharging air passage (for example, Japanese Patent Laid-Open No. 5
1-74109), but this type had the disadvantage that the cooling device was large and expensive.
従って、本発明は、小型で安価な熱交換器により過給気
を冷却してノッキングを防止するとともに、より充填効
率の高い出力性能の向上した過給機付のエンジン吸気装
置を提供することを目的とする。Therefore, it is an object of the present invention to provide an engine intake system equipped with a supercharger that prevents knocking by cooling the supercharged air using a small and inexpensive heat exchanger, and has higher charging efficiency and improved output performance. purpose.
その構成は、主吸気通路と過給機を介設した補助吸気通
路とを有する過給機付エンジンにおいて、主吸気通路を
流通する吸気と、過給機下流の補助吸気通路内を流通す
る過給気を熱交換させる熱交換器を過給機下流において
、前記両吸気通路内に形成したことを特徴とする。In a supercharged engine that has a main intake passage and an auxiliary intake passage with a supercharger in between, intake air flows through the main intake passage and intake air flows through the auxiliary intake passage downstream of the supercharger. The present invention is characterized in that a heat exchanger for exchanging heat with the supply air is formed in both the intake passages downstream of the supercharger.
本発明の上記構成によれば、過給気は主吸気通路を流通
する吸気との熱交換により温度が低下し、その密度が大
きくなるため、過給効果を高めることができる。According to the above configuration of the present invention, the temperature of the supercharging air decreases through heat exchange with the intake air flowing through the main intake passage, and its density increases, so that the supercharging effect can be enhanced.
さらに、主吸気通路を通る吸気と過給気との間の温度差
が少くなるため、エンジンの燃焼室に吸入される吸気温
度が均一化され、局部的な高温域がなくなり、ノッキン
グが防止される。Furthermore, because the temperature difference between the intake air passing through the main intake passage and the supercharged air is reduced, the temperature of the intake air taken into the engine's combustion chamber is equalized, eliminating local high-temperature areas and preventing knocking. Ru.
本発明においては、主吸気通路を通る吸気は、空気と燃
料との混合気とすることが好ましく、その場合には、混
合気中の燃料の一部は、過給気から熱を奪って気化する
ため、エンジンの燃焼状態は大巾に改善され、燃費を向
上させることができる。In the present invention, it is preferable that the intake air passing through the main intake passage be a mixture of air and fuel. In that case, part of the fuel in the mixture takes heat from the supercharged air and vaporizes it. Therefore, the combustion state of the engine is greatly improved, and fuel efficiency can be improved.
さらに本発明の他の態様においては、補助吸気通路の一
部を主吸気通路に通して、該補助吸気通路に放熱フィン
を形成し、この放熱フィンに燃料を吹きつけるように燃
料噴射弁を設けてもよい。Furthermore, in another aspect of the present invention, a part of the auxiliary intake passage is passed through the main intake passage, a radiation fin is formed in the auxiliary intake passage, and a fuel injection valve is provided to spray fuel onto the radiation fin. It's okay.
以下、実施例に従い本発明を具体的に説明する。The present invention will be specifically described below with reference to Examples.
第１図を参照すれば、エンジンＥは、シリンダ１とシリ
ンダ１内を往復動するピストン２を有している。Referring to FIG. 1, the engine E has a cylinder 1 and a piston 2 that reciprocates within the cylinder 1.
シリンダ１の上部には燃焼室３が形成され、またシリン
ダ１には該燃焼室に開口する吸気ポート４、補助吸気ポ
ート５、排気ポート６が形成されている。A combustion chamber 3 is formed in the upper part of the cylinder 1, and an intake port 4, an auxiliary intake port 5, and an exhaust port 6 are formed in the cylinder 1, which open into the combustion chamber.
吸気ポート４には吸気弁７、補助吸気ポート５には補助
弁８、排気ポート６には排気弁９がそれぞれ組み合わさ
れる。The intake port 4 is combined with an intake valve 7, the auxiliary intake port 5 is combined with an auxiliary valve 8, and the exhaust port 6 is combined with an exhaust valve 9.
吸気ポート４は主吸気通路１０に接続され、補助吸気ポ
ート５は補助吸気通路１１に接続されている。The intake port 4 is connected to a main intake passage 10, and the auxiliary intake port 5 is connected to an auxiliary intake passage 11.
これら主吸気通路１０及び補助吸気通路１１は、共にエ
アクリーナ１２を有する吸気路１３に接続される。Both the main intake passage 10 and the auxiliary intake passage 11 are connected to an intake passage 13 having an air cleaner 12.
主吸気通路１０にはスロットルバルブ１４が配置され、
該スロットルバルブ１４の下流側には燃料噴射弁１５が
設けられる。A throttle valve 14 is arranged in the main intake passage 10,
A fuel injection valve 15 is provided downstream of the throttle valve 14.
吸気路１３には、空気流量検出装置すなわちエアフロー
メータ１６ａが配置され、該空気流量検出装置の出力は
マイクロコンピュータから成る制御回路１６ｂに与えら
れ、該制御回路１６ｂは、吸気路１３を通る吸入空気量
及びエンジンの運転条件に適応した燃料供給量を演算し
、制御信号を燃料噴射弁１５に与えて所要量の燃料を主
吸気通路１０に噴射する。An air flow rate detection device, that is, an air flow meter 16a is disposed in the intake path 13, and the output of the air flow rate detection device is given to a control circuit 16b consisting of a microcomputer. The amount of fuel to be supplied is calculated in accordance with the amount of fuel and the operating conditions of the engine, and a control signal is given to the fuel injection valve 15 to inject the required amount of fuel into the main intake passage 10.
さらに、燃料噴射弁１５の付近の主吸気通路には、２重
管式熱交換器構造の外管を威す外管部１０ａが形成され
ている。Further, in the main intake passage near the fuel injection valve 15, an outer tube portion 10a is formed which is an outer tube of a double-tube heat exchanger structure.
補助吸気通路１１には、ベーンタイプのエアポンプより
戊、ろ過給機１７が配置され、該過給機１１の下流側で
、過給コントロールバルブ１８との間には過給リーフバ
ルブ１９が設けられ、この過給リーフバルブ１９からリ
ーフされた空気はリーフ通路２０を通して過給機の上流
の補助吸気通路１１に戻されるようになっている。A filtration feeder 17 is arranged in the auxiliary intake passage 11, which is more similar to a vane type air pump, and a supercharging leaf valve 19 is provided downstream of the supercharger 11 and between the supercharging control valve 18 and the supercharging control valve 18. The air leafed from this supercharging leaf valve 19 is returned to the auxiliary intake passage 11 upstream of the supercharger through a leaf passage 20.
さらに該過給コントロールバルブの下流には２重管式熱
交換器構造の内管を或す内管部１１ａが設けられている
。Furthermore, an inner tube section 11a having an inner tube having a double tube heat exchanger structure is provided downstream of the supercharging control valve.
この内管部１１ａは放熱フィン１１ｂ付であることが好
ましい。This inner tube portion 11a is preferably provided with radiation fins 11b.
本例においては、燃料噴射弁１５は、液状燃料を放熱フ
ィン１１ｂに吹きつけるように配置されている。In this example, the fuel injection valve 15 is arranged so as to spray liquid fuel onto the radiation fins 11b.
熱交換器内では過給気は高温側流体として作用し、主吸
気通路内の空気及び燃料の混合気は低温側流体として作
用する。In the heat exchanger, the supercharged air acts as a high-temperature fluid, and the air/fuel mixture in the main intake passage acts as a low-temperature fluid.
熱交換器の内管部はフィン付であるので総括伝熱係数を
大きくすることができ、熱交換が効果的に行なわれる。Since the inner tube portion of the heat exchanger is equipped with fins, the overall heat transfer coefficient can be increased, and heat exchange can be performed effectively.
さらに、本例のように燃料噴射弁１５からの燃料が液状
で内管部に接触する場合にはいわゆる沸騰伝熱となるの
でさらに総括伝熱係数は大きくなる。Furthermore, when the fuel from the fuel injection valve 15 is in a liquid state and contacts the inner pipe portion as in this example, so-called boiling heat transfer occurs, so that the overall heat transfer coefficient further increases.
従って、熱交換が有効に行なわれ、低温側流体である上
記混合気と高温側流体である過給気との温度差は接近し
て燃焼室３内の温度分布が均一化し、局部的な高温域が
なくなるのでノッキングが起こりにくくなる。Therefore, heat exchange is carried out effectively, and the temperature difference between the air-fuel mixture, which is the low-temperature side fluid, and the supercharged air, which is the high-temperature side fluid, becomes close, and the temperature distribution in the combustion chamber 3 becomes uniform, causing localized high temperatures. Since the area is eliminated, knocking becomes less likely to occur.
また燃料の一部は、高温側流体すなわち過給気より蒸発
潜熱を受は取って気化するので、燃焼状態が良好になり
、燃費を低減化できる。In addition, a portion of the fuel receives and absorbs latent heat of vaporization from the high-temperature fluid, that is, the supercharged air, and is vaporized, so that the combustion state is improved and fuel consumption can be reduced.
またこのことは、過給気側から見れば燃料に蒸発潜熱を
与えることになるので過給気の温度が降下するに伴い燃
焼室３内の温度も全体として降下する。Moreover, this means that latent heat of vaporization is imparted to the fuel when viewed from the supercharged air side, so as the temperature of the supercharged air decreases, the temperature within the combustion chamber 3 as a whole also decreases.
従って、ノッキングの防止に寄与することとなる。Therefore, it contributes to the prevention of knocking.
さらに、混合気の温度の低下により、充填効率を上げる
ことができ、出力の向上を図ることができる。Furthermore, by lowering the temperature of the air-fuel mixture, it is possible to increase charging efficiency and improve output.
なお第２図に示すように本発明は気化器式エンジンにも
同様に適用することができる。Note that, as shown in FIG. 2, the present invention can be similarly applied to a carburetor type engine.
第１図に対応する部分は同一の符号で示し、その詳細な
説明は省略する。Portions corresponding to those in FIG. 1 are designated by the same reference numerals, and detailed explanation thereof will be omitted.
この場合、主吸気通路１０内には気化器３０が設けられ
る。In this case, a carburetor 30 is provided within the main intake passage 10.
また、熱交換器は高温側流体すなわち過給気が外管内を
流通し、低温側流体すなわち混合気が内管内を流通する
構造となっている。Further, the heat exchanger has a structure in which a high-temperature side fluid, ie, supercharged air, flows through an outer tube, and a low-temperature side fluid, ie, an air-fuel mixture, flows through an inner tube.
第１図は本発明に係る燃料噴射式エンジンの過給装置を
示すエンジンの概略図、第２図は本発明に係る気化器式
エンジンの過給装置を示すエンジンの概略図である。
符号の説明、１・・・・・・シリンダ、２・・・・・・
ピストン、３・・・・・・燃焼室、４・・・・・・吸気
ポート、５・・・・・・補助吸気ポート、６・・・・・
・排気ポート、７・・・・・・吸気弁、８・・・・・補
助弁、９・・・・・・排気弁、１０・・・・・・主吸気
通路、１１・・・・・・補助吸気通路、１０ａ・・・・
・・熱交換器外管部、１１ａ・・・・・・熱交換器内管
部、１４・・・・・・スロットル弁、１７・・・・・・
過給機、１８・・・・・・過給コントロールバルブ、１
９・・・・・・過給リーフバルブ。FIG. 1 is a schematic diagram of an engine showing a supercharging device for a fuel injection type engine according to the present invention, and FIG. 2 is a schematic diagram of an engine showing a supercharging device for a carburetor type engine according to the present invention. Explanation of symbols, 1...Cylinder, 2...
Piston, 3... Combustion chamber, 4... Intake port, 5... Auxiliary intake port, 6...
・Exhaust port, 7...Intake valve, 8...Auxiliary valve, 9...Exhaust valve, 10...Main intake passage, 11...・Auxiliary intake passage, 10a...
...Heat exchanger outer pipe section, 11a... Heat exchanger inner pipe section, 14... Throttle valve, 17...
Supercharger, 18...Supercharging control valve, 1
9...Supercharging leaf valve.
Claims (1)
する過給機付エンジンにおいて、主吸気通路を流通する
吸気と、過給機下流の補助吸気通路内を流通する過給気
を熱交換させる熱交換器を、過給器下流において、前記
両吸気通路に形成したことを特徴とする過給機付エンジ
ンの吸気装置。 ２ 前記熱交換器における主吸気通路を流通する吸気を
燃料と空気との混合気としたことを特徴とする前記第１
項記載の過給機付エンジンの吸気装置。[Claims] 1. In a supercharged engine having a main intake passage and an auxiliary intake passage with a supercharger interposed therebetween, intake air flowing through the main intake passage and the inside of the auxiliary intake passage downstream of the supercharger are An intake system for a supercharged engine, characterized in that a heat exchanger for exchanging heat with circulating supercharged air is formed in both intake passages downstream of the supercharger. 2. The first method characterized in that the intake air flowing through the main intake passage in the heat exchanger is a mixture of fuel and air.
Intake system for a supercharged engine as described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56117972A JPS5840005B2 (en) | 1981-07-28 | 1981-07-28 | Intake system for supercharged engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56117972A JPS5840005B2 (en) | 1981-07-28 | 1981-07-28 | Intake system for supercharged engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5820924A JPS5820924A (en) | 1983-02-07 |
| JPS5840005B2 true JPS5840005B2 (en) | 1983-09-02 |
Family
ID=14724827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56117972A Expired JPS5840005B2 (en) | 1981-07-28 | 1981-07-28 | Intake system for supercharged engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5840005B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6273808U (en) * | 1985-10-25 | 1987-05-12 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4856368A (en) * | 1987-06-26 | 1989-08-15 | Kanzaki Kokyukoki Mfg. Co. Ltd. | HST (hydrostatic transmission) containing axle drive apparatus |
| US4922787A (en) * | 1987-06-26 | 1990-05-08 | Kanzaki Kokyukoki Mfg. Co. Ltd. | HST (hydrostatic transmission) housing axle driving apparatus |
| US5040649A (en) * | 1988-06-03 | 1991-08-20 | Kanzaki Kokyukoki Mfg. Co., Ltd. | HST type axle driving apparatus with brake and transmission interlock |
-
1981
- 1981-07-28 JP JP56117972A patent/JPS5840005B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6273808U (en) * | 1985-10-25 | 1987-05-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5820924A (en) | 1983-02-07 |
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