JP2530580B2 - Forced intake method in internal combustion engine - Google Patents

Forced intake method in internal combustion engine

Info

Publication number
JP2530580B2
JP2530580B2 JP63236085A JP23608588A JP2530580B2 JP 2530580 B2 JP2530580 B2 JP 2530580B2 JP 63236085 A JP63236085 A JP 63236085A JP 23608588 A JP23608588 A JP 23608588A JP 2530580 B2 JP2530580 B2 JP 2530580B2
Authority
JP
Japan
Prior art keywords
negative pressure
cylinder
exhaust
valve
internal combustion
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 - Fee Related
Application number
JP63236085A
Other languages
Japanese (ja)
Other versions
JPH0281928A (en
Inventor
義明 角田
Original Assignee
義明 角田
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 義明 角田 filed Critical 義明 角田
Priority to JP63236085A priority Critical patent/JP2530580B2/en
Publication of JPH0281928A publication Critical patent/JPH0281928A/en
Application granted granted Critical
Publication of JP2530580B2 publication Critical patent/JP2530580B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/04—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Characterised By The Charging Evacuation (AREA)

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は混合気の充填効率を向上する内燃機関に於る
強制吸気方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a forced intake method for an internal combustion engine that improves the charging efficiency of an air-fuel mixture.

（従来の技術） 特許第125662号明細書に開示されているように、吸気
時に排気弁を開いて吸気を気筒内に慣性吸引する技術は
特に２サイクル機関では公知である。一方従来の４サイ
クル機関でも、吸入工程に於て気筒内に生じた負圧と大
気圧の圧力差で吸入管内の混合気柱を加速しかつまた吸
入弁や気化器抵抗に打勝つように構成されている。(Prior Art) As disclosed in Japanese Patent No. 125662, a technique of opening an exhaust valve at the time of intake and inertially sucking intake air into a cylinder is known particularly in a two-cycle engine. On the other hand, even in the conventional 4-cycle engine, the mixture column in the suction pipe is accelerated by the pressure difference between the negative pressure and the atmospheric pressure generated in the cylinder during the suction process, and the suction valve and the carburetor resistance are also overcome. Has been done.

また吸入側では、吸入弁を下死点で閉めず、慣性効果
を利用して充填量の増加を図ることも普通に行なわれて
いる。Also, on the suction side, it is common practice to use the inertial effect to increase the filling amount without closing the suction valve at bottom dead center.

しかしながら、従来の方法では気筒内に生ずる圧力差
は限られており、その自然圧力差を越えた混合気量を気
筒に充填するためにはルーツブロワを用いた機械式やタ
ーボ式のスーパーチャージャにより過給をする必要があ
る。However, in the conventional method, the pressure difference generated in the cylinder is limited, and in order to fill the cylinder with an air-fuel mixture amount exceeding the natural pressure difference, a mechanical or turbo supercharger using a roots blower is used. I need to get a salary.

機械式過給機が機関出力を消費する欠点を有するのは
周知の事実であり、ターボ式過給機の場合、出力の直接
消費はないが、機関本体とのマッチングの問題や立上り
の遅れがある。またいずれの場合も過給機のためにコス
ト高になる問題がある。It is a well-known fact that mechanical turbochargers have the drawback of consuming engine output.In the case of turbochargers, there is no direct consumption of output, but there is a problem of matching with the engine body and a delay in start-up. is there. Further, in either case, there is a problem that the cost increases due to the supercharger.

（技術的課題） 本発明は前記の点に着目してなされたものでその課題
は、過給機を使用しなくても混合気の充填効率を向上す
ることができるようにすることにある。(Technical problem) The present invention has been made in view of the above points, and an object thereof is to improve the charging efficiency of an air-fuel mixture without using a supercharger.

（技術的手段） 前記課題解決の為、本発明は、内燃機関に於て、排気
ガス流速を排気ガスが大気放出される排気系の最も下流
にて加速し、負圧を発生する吸引手段により強力な負圧
を恒常的に発生させ、かつこの強力な負圧が気筒の排気
弁側に常時印加されるように吸引手段と気筒の排気弁側
とを接続し、吸気弁と排気弁の作動のオーバーラップ時
に、開弁中の吸気弁と排気弁を通じて前記強力な負圧が
混合気に吸引作用し、混合気を当該気筒内に負圧吸引す
るようにしたものである。(Technical Means) In order to solve the above problems, the present invention provides an internal combustion engine with a suction means for accelerating the exhaust gas flow velocity at the most downstream side of the exhaust system where the exhaust gas is released to the atmosphere and generating a negative pressure. The suction means and the exhaust valve side of the cylinder are connected so that a strong negative pressure is constantly generated and this strong negative pressure is constantly applied to the exhaust valve side of the cylinder, and the intake valve and the exhaust valve are operated. At the time of the overlap, the strong negative pressure acts on the air-fuel mixture through the intake valve and the exhaust valve being opened, and the air-fuel mixture is sucked into the cylinder.

即ち本発明は任意の気筒の爆発工程後に発生した強力
な負圧エネルギーを次の気筒の吸入工程に利用するた
め、排気弁側に恒常的に強力な負圧を印加しており、そ
のための負圧エネルギーは吸入弁、排気弁の作動のオー
バーラップ状態で、排気系を通じて、気筒内に瞬時に作
用する。なお、負圧エネルギーは排気ガス流を加速して
得ることを特徴とする。That is, in the present invention, in order to utilize the strong negative pressure energy generated after the explosion process of any cylinder in the intake process of the next cylinder, a constant strong negative pressure is constantly applied to the exhaust valve side, and the negative pressure for that is applied. The pressure energy instantaneously acts on the inside of the cylinder through the exhaust system in the overlapping state of the operation of the intake valve and the exhaust valve. The negative pressure energy is obtained by accelerating the exhaust gas flow.

従って本発明の方法は、強力な負圧を排気弁側に印加
し、吸入弁、排気弁の作動のオーバーラップ時に混合気
が負圧吸引される構成であるから、上述の多気筒機関の
みならず、単気筒機関にも適用できることは明らかであ
る。Therefore, the method of the present invention has a configuration in which a strong negative pressure is applied to the exhaust valve side and the mixture is sucked at the negative pressure when the operation of the intake valve and the exhaust valve overlap, so that only the above-described multi-cylinder engine can be used. Instead, it is clear that it can also be applied to a single cylinder engine.

（作用） 直列４気筒４サイクル機関を例とすると、４個の気筒
は例えば１番、３番、４番、２番の順序で点火される。(Operation) Taking an in-line four-cylinder four-cycle engine as an example, four cylinders are ignited in the order of No. 1, No. 3, No. 4, No. 2, and No. 2, for example.

他方爆発によって生じた排気ガス流は吸引手段18によ
って加速され、その負圧によって排気ガス流が加速され
るので、非常に強力な負圧を発生しており、この強力な
負圧が気筒の排気弁に印加される。このため吸気弁と排
気弁が開くと同時に該負圧が混合気に作用する。On the other hand, the exhaust gas flow generated by the explosion is accelerated by the suction means 18, and the negative pressure thereof accelerates the exhaust gas flow, so that a very strong negative pressure is generated. Applied to the valve. Therefore, the negative pressure acts on the air-fuel mixture at the same time when the intake valve and the exhaust valve are opened.

即ち次の爆発が起る気筒に吸気弁、排気弁のオーバー
ラップが起るので、混合気を瞬時に強制吸引することが
でき、それによってその気筒の内の圧力差は著しく高め
られる。その結果気筒内に大量の混合気が充填されるこ
ととなり、当該気筒の爆発後は次の爆発順序の気筒に同
様の強制吸引作用が行なわれる。That is, since the intake valve and the exhaust valve overlap each other in the cylinder in which the next explosion occurs, the air-fuel mixture can be instantaneously forcibly sucked, whereby the pressure difference in the cylinder is significantly increased. As a result, a large amount of air-fuel mixture is filled in the cylinder, and after the explosion of the cylinder, the same forced suction action is performed on the cylinder in the next explosion order.

通常運転下の軸回転数は毎分数百回転から数千回転で
あるが、その状態で各気筒の吸入弁、排気弁は殆んど開
き、瞬間的に閉じることで吸排気を制御しているような
状態となるので、吸引手段による負圧も全ての気筒内に
連続的に作用する。The shaft speed under normal operation is several hundreds to several thousand revolutions per minute, but in that state, the intake and exhaust valves of each cylinder are almost opened, and the intake and exhaust are controlled by closing them momentarily. As a result, the negative pressure by the suction means continuously acts on all the cylinders.

（実施例） 図面を参照して説明すると、第１図には直列４気筒４
サイクルのガソリンエンジンが示されており、〜は
前記の４個の気筒である。10は機関本体、11は吸入管、
12は排気管、13は任意の気筒14内のピストン、15は吸入
弁、16は排気弁、17は排気管12に設けたマフラーで、吸
引手段18は排気系の最も下流に配置される。これは加速
された負圧空気流が再び抵抗を受けて吸引エネルギーが
減少するのを防ぐためである。なお吸入管11も従来通り
慣性効果を利用できるようにするとさらに良い。(Embodiment) Explaining with reference to the drawings, FIG.
A cycle gasoline engine is shown, where is the four cylinders described above. 10 is the engine body, 11 is the suction pipe,
12 is an exhaust pipe, 13 is a piston in an arbitrary cylinder 14, 15 is an intake valve, 16 is an exhaust valve, 17 is a muffler provided in the exhaust pipe 12, and a suction means 18 is arranged at the most downstream side of the exhaust system. This is to prevent the accelerated negative pressure air flow from receiving resistance again and reducing the suction energy. It is even better if the suction pipe 11 can also utilize the inertial effect as usual.

吸引手段18は第４図に例示されており、加速筒２とケ
ーシング30とを備え、加速筒20は前端の大径部から口径
を最少に絞ったテーパ管部21、第１加速部22、その直後
の室の外周壁に開口した第１吸引口23、第２加速部、2
4、その直後の室の外周壁に開口した第２吸引口25、第
３加速部26、その直径の室の外周壁に開口した第３吸引
口27及びテイルチューブ28を順にタンデム配置したもの
で、各加速部の容積は順次増積する設定となっている。The suction means 18 is illustrated in FIG. 4, and is provided with an accelerating cylinder 2 and a casing 30, and the accelerating cylinder 20 has a tapered tube portion 21, a first accelerating portion 22, the diameter of which is minimized from the large diameter portion at the front end. Immediately after that, the first suction port 23 opened on the outer peripheral wall of the chamber, the second acceleration unit, 2
4, the second suction port 25 opened on the outer peripheral wall of the chamber immediately after that, the third accelerating portion 26, the third suction port 27 opened on the outer peripheral wall of the chamber of that diameter, and the tail tube 28 are arranged in tandem in order. The volume of each acceleration unit is set to increase sequentially.

前記第１加速部22の容積V1はテーパ管部21で排気流速
を最少に絞り第１次加速流を得るため必要な容積に設定
される。尚実施例の第２、第３加速部24、26の容積はV2
＝AV1、V3＝BV2（Ａ＝Ｂ＝２）となるような関係で増積
されている。勿論この係数Ａ、Ｂは別の任意な数値をと
り得るが、このように増積することで各部流速の維持、
従って負圧の低下を維持することができる。また、テイ
ルチューブ28の内径は第３加速部26の内径よりさらに大
であり、排気ガス流が加速されたまま大気放出されるよ
うになっている。なお第１〜第３の各吸引口23、25、27
については前進角θをつけるのが良く、この場合角度θ
は０より大で90度未満、望ましくは10〜30度の範囲が良
い。各吸引口23〜27の孔数、孔径は任意に設定できる。The volume V 1 of the first accelerating section 22 is set to a volume necessary for obtaining the first accelerated flow by narrowing the exhaust gas flow velocity in the taper pipe section 21 to the minimum. The volumes of the second and third accelerating parts 24 and 26 of the embodiment are V 2
= AV 1 , V 3 = BV 2 (A = B = 2). Of course, the coefficients A and B can take other arbitrary numerical values, but by increasing the product in this way, maintaining the flow velocity at each part,
Therefore, the decrease in negative pressure can be maintained. Further, the inner diameter of the tail tube 28 is larger than the inner diameter of the third accelerating portion 26, and the exhaust gas flow is discharged to the atmosphere while being accelerated. The first to third suction ports 23, 25, 27
For, it is better to add a forward angle θ, in this case the angle θ
Is more than 0 and less than 90 degrees, preferably 10 to 30 degrees. The number of holes and the hole diameters of the suction ports 23 to 27 can be set arbitrarily.

また31は排気管12の中途と吸引手段18とを接続する吸
引管で、必要に応じサイレンサ32と逆止弁33が設けられ
る。Further, 31 is a suction pipe that connects the middle of the exhaust pipe 12 and the suction means 18, and a silencer 32 and a check valve 33 are provided as necessary.

（効果） 本発明は以上の如く構成され、かつ作用するもので、
排気系の最下流に形成した、排気ガスエネルギー利用の
強力な負圧を減衰させることなく気筒の排気弁側に印加
することができ、混合気を、吸入弁と排気弁がオーバー
ラップして開弁状態となるタイミングで、気筒内に強制
吸引できるものであるから、混合気の充填量を著しく増
すことができるという効果を奏する。(Effect) The present invention is configured and operates as described above,
The strong negative pressure of exhaust gas energy utilization, which is formed at the most downstream side of the exhaust system, can be applied to the exhaust valve side of the cylinder without attenuating, and the mixture opens when the intake valve and exhaust valve overlap. Since it is possible to forcibly suck into the cylinder at the timing when the valve state is reached, there is an effect that the filling amount of the air-fuel mixture can be significantly increased.

従って本発明によれば過給機を利用しなくても充填効
率が顕著に高まり、しかも機関出力を消費しないだけで
なく、作動の遅れの問題もないため従来のターボ式その
他の過給機による充填方法よりも格段に優れている。Therefore, according to the present invention, the charging efficiency is remarkably increased without using the supercharger, the engine output is not consumed, and there is no problem of operation delay. Much better than the filling method.

【図面の簡単な説明】[Brief description of drawings]

図面は本発明方法の実施例を示すもので、第１図は平面
図、第２図は気筒の断面図、第３図は側面説明図、第４
図は吸引手段の断面説明図である。The drawings show an embodiment of the method of the present invention. FIG. 1 is a plan view, FIG. 2 is a sectional view of a cylinder, FIG. 3 is a side view, and FIG.
The figure is a cross-sectional view of the suction means.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】内燃機関に於て、排気ガス流速を排気ガス
が大気放出される排気系の最も下流にて加速し、負圧を
発生する吸引手段により強力な負圧を恒常的に発生さ
せ、かつこの強力な負圧が気筒の排気弁側に常時印加さ
れるように吸引手段と気筒の排気弁側とを接続し、吸気
弁と排気弁の作動のオーバーラップ時に、開弁中の吸気
弁と排気弁を通じて前記強力な負圧が混合気に吸引作用
し、混合気を当該気筒内に負圧吸引することを特徴とす
る内燃機関に於る強制吸気方法。1. In an internal combustion engine, the exhaust gas flow velocity is accelerated at the most downstream side of the exhaust system where the exhaust gas is released into the atmosphere, and a powerful negative pressure is constantly generated by suction means for generating a negative pressure. In addition, the suction means and the exhaust valve side of the cylinder are connected so that this strong negative pressure is always applied to the exhaust valve side of the cylinder, and when the intake valve and the exhaust valve overlap in operation, the intake air being opened. A forced intake method for an internal combustion engine, characterized in that the strong negative pressure acts on the air-fuel mixture through a valve and an exhaust valve to suck the air-fuel mixture into the cylinder under negative pressure.
JP63236085A 1988-09-20 1988-09-20 Forced intake method in internal combustion engine Expired - Fee Related JP2530580B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63236085A JP2530580B2 (en) 1988-09-20 1988-09-20 Forced intake method in internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63236085A JP2530580B2 (en) 1988-09-20 1988-09-20 Forced intake method in internal combustion engine

Publications (2)

Publication Number Publication Date
JPH0281928A JPH0281928A (en) 1990-03-22
JP2530580B2 true JP2530580B2 (en) 1996-09-04

Family

ID=16995497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63236085A Expired - Fee Related JP2530580B2 (en) 1988-09-20 1988-09-20 Forced intake method in internal combustion engine

Country Status (1)

Country Link
JP (1) JP2530580B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101688462B (en) * 2008-06-13 2013-01-02 雅马哈发动机株式会社 Engine, vehicle, boat, and engine exhaust gas cleaning method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606827U (en) * 1983-06-28 1985-01-18 日産ディーゼル工業株式会社 Internal combustion engine exhaust passage device
JPS6032931A (en) * 1983-08-01 1985-02-20 Moriwaki Eng:Kk Exhaust pipe for multi-cylinder engine

Also Published As

Publication number Publication date
JPH0281928A (en) 1990-03-22

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