JPS5825857B2 - How to complete the cycle - Google Patents
How to complete the cycleInfo
- Publication number
- JPS5825857B2 JPS5825857B2 JP9923875A JP9923875A JPS5825857B2 JP S5825857 B2 JPS5825857 B2 JP S5825857B2 JP 9923875 A JP9923875 A JP 9923875A JP 9923875 A JP9923875 A JP 9923875A JP S5825857 B2 JPS5825857 B2 JP S5825857B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- valve
- air
- cylinder chamber
- intake
- 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
- 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
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【発明の詳細な説明】
本発明は４サイクル内燃機関において、Ｅ−Ｇ−Ｒ効果
を大幅に高めることにより、大気中に排出される排気ガ
ス中のＨＣ，ＣＯ，ＮＯｘなどの有害成分の含有量を大
幅に低減することのできる４サイクル内燃機関の低公害
燃焼方法を提供することを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention reduces the content of harmful components such as HC, CO, and NOx in exhaust gas emitted into the atmosphere by significantly increasing the E-G-R effect in a four-stroke internal combustion engine. It is an object of the present invention to provide a low-pollution combustion method for a four-stroke internal combustion engine that can significantly reduce the amount of combustion.
Ｅ−Ｇ−Ｒ効果を得るために、従来では吸気弁の開弁時
期をピストン上死点前にし、排気弁の閉弁時期をピスト
ン上死点直後にすることにより、ピストン上死点後から
排気弁閉弁直前までのわずかな期間に、シリンダ室の負
圧による脈動波を利用シテ、排気マニホルドに一旦排出
された排気ガスをシリンダ室に吸い戻すことが知られて
いる。In order to obtain the E-G-R effect, conventionally, the intake valve is opened before the piston top dead center, and the exhaust valve is closed immediately after the piston top dead center. It is known that during a short period of time just before the exhaust valve closes, pulsating waves caused by negative pressure in the cylinder chamber are used to suck exhaust gas, which was once discharged into the exhaust manifold, back into the cylinder chamber.
しかし、この場合には、排ガスの吸い戻し期間がわずか
しかないため、シリンダ室・＼の排ガスの吸い戻し量が
充分にとれず、Ｅ−Ｇ−Ｒ効果が充分に発揮され得なか
った。However, in this case, since the period for sucking back the exhaust gas was only short, a sufficient amount of exhaust gas could not be sucked back into the cylinder chamber, and the E-GR effect could not be fully exhibited.
そこで本発明は、シリンダ室への排ガスの吸い戻し量を
充分にとることによりＥ−Ｇ−Ｒ効果を高めることを目
的とし、そのために、排気弁の閉弁時期と吸気弁の開弁
時期との両方をピストン上死点後に遅らせることにより
、排気マニホルドからシリンダ室への排気ガスの吸い戻
し期間を長くとれ、その吸い戻し力を大きくとれるよう
にしたことを特徴とするものである。Therefore, an object of the present invention is to increase the E-G-R effect by ensuring a sufficient amount of exhaust gas is sucked back into the cylinder chamber. By delaying both of the above after the piston top dead center, the period for sucking back the exhaust gas from the exhaust manifold to the cylinder chamber can be extended, and the sucking back force can be increased.
以下、本発明方法の実施手順例を図に基づき説明する。Hereinafter, an example of the implementation procedure of the method of the present invention will be explained based on the drawings.
第１図は本実施手順例に使用される強制空冷側弁式４サ
イクルガソリンエンジンの要部縦断側面図を示す。FIG. 1 shows a longitudinal sectional side view of essential parts of a forced air-cooled side valve type four-stroke gasoline engine used in this example of the procedure.
符号１はシリンダ本体、２はシリンダヘッド、３はシリ
ンダ室、４は点火栓、５は吸気弁、６は排気弁、７は吸
気マニホルド、８は排気マニホルド、９は空冷ファン、
１０はファンカバ、１１は導風板であり、これは周知通
りに構成されている。1 is a cylinder body, 2 is a cylinder head, 3 is a cylinder chamber, 4 is a spark plug, 5 is an intake valve, 6 is an exhaust valve, 7 is an intake manifold, 8 is an exhaust manifold, 9 is an air cooling fan,
10 is a fan cover, and 11 is a baffle plate, which are configured in a well-known manner.
排気マニホルド８にはファン９から供給される空気の一
部が導風管１２、エアクリーナ１３及び逆止弁１４を介
して供給されるようになっている。A portion of the air supplied from the fan 9 is supplied to the exhaust manifold 8 via an air guide pipe 12, an air cleaner 13, and a check valve 14.
第２図は本実施手順例のバルブタイミングダイヤグラム
を示す。FIG. 2 shows a valve timing diagram of this example procedure.
図中符号（吸気）は吸気工程、（圧縮）は圧縮工程、（
膨張）は膨張工程、（排気）は排気工程、（上死点）は
ピストン上死点、（下死点）はピストン下死点を示し、
これらのバルブタイミングは次に述べること以外は、周
知通りになっている。In the figure, the symbol (intake) is the intake process, (compression) is the compression process, (
Expansion) indicates the expansion process, (exhaust) indicates the exhaust process, (top dead center) indicates the piston top dead center, (bottom dead center) indicates the piston bottom dead center,
These valve timings are as known except as described below.
即ち、吸気工程始端の吸気弁５の開弁時期１５はピスト
ン上死点後の角度θ１の位置にあり、排気工程終端の排
気弁６の閉弁時期１６はピストン上死点後の角度θ２の
位置にあり、両弁５，６のオーバラップ期間θ３は後者
角度θ２から前者角度θ１を差引いた角度になっている
。That is, the opening timing 15 of the intake valve 5 at the beginning of the intake stroke is at the angle θ1 after the piston top dead center, and the closing timing 16 of the exhaust valve 6 at the end of the exhaust stroke is at the angle θ2 after the piston top dead center. The overlap period θ3 of both valves 5 and 6 is an angle obtained by subtracting the former angle θ1 from the latter angle θ2.
これにより、次の（イ）乃至（羽の作用効果が得られ
る。As a result, the following effects (a) to (wings) can be obtained.
（イ）排気工程（排気）の終部において、ピストン上死
点（上死点）を越えたときには吸気弁５はまだ閉じたま
ま、吸気工程（吸気）はまだ開始されていない。(a) At the end of the exhaust stroke (exhaust), when the piston exceeds the top dead center (top dead center), the intake valve 5 is still closed and the intake stroke (intake) has not yet started.
このため、シリンダ室３には負圧による脈動波が生じて
、シリンダ室３から一旦排気マニホルド８に排出された
排気ガスをシリンダ室３に強力に吸い戻し始める。Therefore, a pulsating wave is generated in the cylinder chamber 3 due to the negative pressure, and exhaust gas, which was once discharged from the cylinder chamber 3 to the exhaust manifold 8, begins to be strongly sucked back into the cylinder chamber 3.
このとき同時にファン９の空気の一部が導風管１２と排
気マニホルド８を経てシリンダ室３に吸込まれ始める。At the same time, part of the air from the fan 9 begins to be sucked into the cylinder chamber 3 via the air guide pipe 12 and the exhaust manifold 8.
このシリンダ室３・＼の排気ガスの吸い戻しと、空気の
吸込みとはθ１角度の間は、吸気工程（吸気）がまだ開
始されていないことから、シリンダ室３の負圧が大きく
、強力に行なわれる。During this suction of exhaust gas back into the cylinder chamber 3 and intake of air, the intake process (intake) has not yet started during the θ1 angle, so the negative pressure in the cylinder chamber 3 is large and strong. It is done.
（ロ）そのシリンダ室３への排気ガスの吸い戻しと、空
気の吸い込みとは、θ、角度終了後のθ３角度の間も行
なわれるが、この場合には、ピストンの下降に加速度が
つく反面、吸気弁５が開いて吸気工程（吸気）が開始さ
れるため、その吸い戻しが比較的強力に行なわれる。(b) The exhaust gas is sucked back into the cylinder chamber 3 and the air is sucked in during the θ3 angle after the end of the θ angle. Since the intake valve 5 opens and the intake process (intake) starts, the suction is performed relatively strongly.
（ハ）上記（イ）及び（ロ）の両件用により、排気ガス
と空気とが排気マニホルド８からシリンダ室３に多量に
吸い戻されるので、この吸い戻された高温排ガスにより
新気中の燃料の蒸発・霧化が促進されるうえ、空気の吸
い戻しにより空燃混合比が大きくなるため、比較的低温
度領域内で完全燃焼しやすく、排気ガス中のＨＣ，ＣＯ
，ＮＯｘの発生量が大幅に低下するかなくなる。(c) Due to both (a) and (b) above, a large amount of exhaust gas and air is sucked back from the exhaust manifold 8 into the cylinder chamber 3, so this sucked back high-temperature exhaust gas absorbs the air in the fresh air. In addition to promoting evaporation and atomization of the fuel, the air-fuel mixture ratio increases due to air being sucked back, making it easy to achieve complete combustion within a relatively low temperature range, reducing HC and CO in the exhaust gas.
, the amount of NOx generated is significantly reduced or eliminated.
即ち、Ｂ−Ｇ−Ｒ効果が充分に発揮される。That is, the BGR effect is fully exhibited.
に）排気弁６の閉弁時期１６は、従来法より可成り遅れ
ていて、ピストン下降速度が速くなっているため、排気
弁６の閉弁後に排気マニホルド８の負圧度合が大きくな
るうえ、導風管１２内を流れる空気にイナーシャがつい
ているため、導風管１２から排気マニホルド８内に空気
が多量に供給される。B) The closing timing 16 of the exhaust valve 6 is much later than in the conventional method, and the piston descending speed is faster, so the degree of negative pressure in the exhaust manifold 8 increases after the exhaust valve 6 is closed, and Since the air flowing through the air guide pipe 12 has inertia, a large amount of air is supplied from the air guide pipe 12 into the exhaust manifold 8.
このため、排気マニホルド８内で排ガス中のＨＣやＣＯ
が再燃焼され、無害化される。For this reason, HC and CO in the exhaust gas inside the exhaust manifold 8
is reburned and rendered harmless.
（羽 吸入空気量の少ない低回転・低負荷時には、吸い
戻し排気ガスはシリンダ室内の底部に溜り、その上側に
新気が位置することになるので、層状燃焼が行なわれ、
失火がなくなる。At low speeds and low loads with a small amount of intake air, the sucked back exhaust gas accumulates at the bottom of the cylinder chamber, and fresh air is located above it, resulting in stratified combustion.
No more misfires.
上記実施手順例ではガソリンエンジンを用いたが、ディ
ーゼルエンジンを用いてもよく、また側弁式エンジンを
用いたが頭上弁式エンジンを用いてもよく、更に前記導
風管１２を省略して、排気マニホルド８からシリンダ室
３への空気の吸い込みをなくすようにしてもよい。Although a gasoline engine was used in the above example of the implementation procedure, a diesel engine may also be used, and although a side valve type engine was used, an overhead valve type engine may also be used, and furthermore, the air guide pipe 12 is omitted, Air suction from the exhaust manifold 8 to the cylinder chamber 3 may be eliminated.
さらに、排気弁６の閉弁時期１６を吸気弁５の開弁時期
１５に合致させるか、この開弁時期１５とピストン上死
点（上死点）との間に位置させてもよい。Furthermore, the closing timing 16 of the exhaust valve 6 may be matched with the opening timing 15 of the intake valve 5, or may be located between this opening timing 15 and the piston top dead center (top dead center).
本発明方法は上記のように構成され、作用するので、シ
リンダ室３から一旦排気マニホルド８に排出した排気ガ
スを排気工程の終了前にシリンダ室３に比較的多量に吸
い戻すので、Ｅ−Ｇ−Ｒ効果を従来法よりも遥かに高め
ることができ、これにより混合気の燃焼性を高められる
うえ、排ガス中のＨＣ，ＣＯ，ＮＯｘなどの有害成分の
含有量を大幅に低下させるかなくすことができる。Since the method of the present invention is constructed and operates as described above, a relatively large amount of exhaust gas once discharged from the cylinder chamber 3 to the exhaust manifold 8 is sucked back into the cylinder chamber 3 before the end of the exhaust process, so that the E-G -The R effect can be much higher than that of conventional methods, which not only improves the combustibility of the air-fuel mixture, but also significantly reduces or eliminates the content of harmful components such as HC, CO, and NOx in the exhaust gas. I can do it.
第１図は本発明方法の実施手順例に使用するエンジンの
要部縦断側面図、第２図は本発明方法の実施手順例のバ
ルブタイミングダイヤグラムを示す。
３・・・・・・シリンダ室、５・・・・・・吸気弁、６
・・・・・・排気弁、８・・・・・・排気マニホルド、
１５・・・・・・５の開弁時期、１６・・・・・６の閉
弁時期。FIG. 1 is a longitudinal sectional side view of a main part of an engine used in an example of the procedure for carrying out the method of the present invention, and FIG. 2 is a valve timing diagram for the example of the procedure for carrying out the method of the present invention. 3...Cylinder chamber, 5...Intake valve, 6
...Exhaust valve, 8...Exhaust manifold,
15...5 valve opening timing, 16...6 valve closing timing.
Claims (1)
とをピストン上死点後に遅らせることにより、排気マニ
ホルド８に一旦排出された排気ガスを排気工程（排気）
の終了前にシリンダ室３に比較的多量に吸い戻すように
したことを特徴とする４サイクル内燃機関の低公害燃焼
方法。1 Closing timing 16 of exhaust valve 6 and opening timing 15 of intake valve 5
By delaying the time after the piston top dead center, the exhaust gas once discharged to the exhaust manifold 8 is transferred to the exhaust process (exhaust).
A low-pollution combustion method for a four-stroke internal combustion engine, characterized in that a relatively large amount of air is sucked back into the cylinder chamber 3 before the end of the combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9923875A JPS5825857B2 (en) | 1975-08-14 | 1975-08-14 | How to complete the cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9923875A JPS5825857B2 (en) | 1975-08-14 | 1975-08-14 | How to complete the cycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5222622A JPS5222622A (en) | 1977-02-21 |
| JPS5825857B2 true JPS5825857B2 (en) | 1983-05-30 |
Family
ID=14242097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9923875A Expired JPS5825857B2 (en) | 1975-08-14 | 1975-08-14 | How to complete the cycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5825857B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5896880U (en) * | 1981-12-22 | 1983-07-01 | 本田技研工業株式会社 | Transformer device in welding robot |
| DE3419963A1 (en) * | 1984-05-29 | 1985-12-05 | Peter 7442 Neuffen Schüle | FOUR-STROKE COMBUSTION ENGINE WITH A DEVICE FOR RECYCLING GAS FROM A EXHAUST PIPE TO THE COMBUSTION COMPARTMENT |
| JPS61111808A (en) * | 1984-11-06 | 1986-05-29 | Sanwa Daiyamondo Kogyo Kk | Bank saw for cutting hard substance |
| KR900003228B1 (en) * | 1987-06-26 | 1990-05-11 | 김광철 | Displaying method and device for micro computer |
| US5665293A (en) * | 1996-03-08 | 1997-09-09 | Basf Corporation | Method of making spun yarn packages multiple individually separable yarn ends |
-
1975
- 1975-08-14 JP JP9923875A patent/JPS5825857B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5222622A (en) | 1977-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5947128B2 (en) | Internal combustion engine intake system | |
| JPS6236134B2 (en) | ||
| US4191135A (en) | Combustion chamber of an internal combustion engine | |
| JPS6234927B2 (en) | ||
| JPS5825857B2 (en) | How to complete the cycle | |
| JPS6088810A (en) | Internal-combustion engine | |
| JPS6218731B2 (en) | ||
| JPS6217091B2 (en) | ||
| JPH0138261Y2 (en) | ||
| JPS5911728B2 (en) | 4 cycle engine | |
| JPH0545789Y2 (en) | ||
| JPH0410343Y2 (en) | ||
| JPS6023463Y2 (en) | Diesel engine fuel injection nozzle device | |
| JPS5851373Y2 (en) | 2-stroke internal combustion engine | |
| JPH077551Y2 (en) | Multi-cylinder diesel engine | |
| JPS6218730B2 (en) | ||
| JPS6218729B2 (en) | ||
| JPH04132858A (en) | Intake structure for engine | |
| JPH0312645B2 (en) | ||
| JPH0436024A (en) | Intake and exhaust system of internal combustion engine | |
| JPS6218732B2 (en) | ||
| JPH03149328A (en) | Two-cycle engine | |
| JP2001032730A (en) | Method for making true expansion ratio larger than true compression ratio when piston valve and rotary valve are used for four-cycle engine, six-cycle engine, eight- cycle engine and ten- or more-cycle engine | |
| JPH01280624A (en) | Combustion chamber for two-cycle internal combustion engine | |
| JPH0674744B2 (en) | 5 cycle internal combustion engine |