JPS60150429A - Two cycle internal-combustion engine - Google Patents
Two cycle internal-combustion engineInfo
- Publication number
- JPS60150429A JPS60150429A JP770084A JP770084A JPS60150429A JP S60150429 A JPS60150429 A JP S60150429A JP 770084 A JP770084 A JP 770084A JP 770084 A JP770084 A JP 770084A JP S60150429 A JPS60150429 A JP S60150429A
- Authority
- JP
- Japan
- Prior art keywords
- scavenging
- throttle valve
- engine
- passage
- scavenging passage
- 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
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
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
-
- 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
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
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２サイクル内燃機関の掃気系に関する。[Detailed description of the invention] The present invention relates to a scavenging system for a two-stroke internal combustion engine.
２サイクル機関の新気の吹き抜けを防止するためには掃
気系の適切なる決定が最もｎ（要であることは１箇を待
たない。このため掃気孔形状に関して多くのｔｉｌ＋究
が試され一定の成果を収めてきた。しかし掃気孔は、最
大出力時の掃気流量が要求するｌＩｒ１面積を必要とす
るので、従来の掃気孔形状は高速・高出力時を主眼に決
定されてきた。このため低連・低負荷時には掃気孔並び
に掃気通路断面積は過大となり掃気流制御がうまく行わ
れないばかりか、シリンダからクランフタへの吹き戻し
現象が発生し、低速トルクの低下、カ１気の吹き抜は損
失の増大、不整鈷焼の増加等を招く結果となった。In order to prevent fresh air from blowing through in a two-stroke engine, the most important thing is to properly determine the scavenging system.For this reason, many studies have been conducted on the shape of the scavenging holes, and certain However, since the scavenging hole requires an area of lIr1, which is required by the scavenging flow rate at maximum output, the conventional scavenging hole shape has been determined with the focus on high speed and high output. At low load, the cross-sectional area of the scavenging holes and scavenging passage becomes too large, which not only makes it difficult to control the scavenging airflow properly, but also causes blowback from the cylinder to the crank lid, resulting in a decrease in low-speed torque and an increase in the amount of air being blown out. This resulted in an increase in losses and an increase in irregular potholes.
ｆｅｄ ｋｃ 孔、ＪＰ ヒニｋｄ ％ ｎ＋’ｉ Ｍ
１ｉｊｉ ｉｌ＋ｉ Ｇ！ｌ ヲ固’ｉｊＬ ト１−
ルＷ 来（Ｄ掃気系においては、このような欠点を免
かれない。fed kc hole, JP hini kd % n+'i M
1iji il+i G! l wo hard 'ijL t1-
The scavenging system cannot avoid such drawbacks.
本発明は掃気ｊ１１１路に絞り弁を設けてその曲面（１
′１を輪間運転状態に応じて変えることにより、低速か
ら高ｒＪ３ 、低負６紅から高負仙に暇って良好なｌｉ
ｌを気を【！するものである。The present invention provides a throttle valve in the scavenging air path j111, and the curved surface (1
By changing '1 according to the driving conditions between the wheels, good LI can be achieved from low speed to high rJ3, from low negative 6 to high negative
Take care of l [! It is something to do.
本発明の目的は掃気の改善によって熔￥１消費量の低減
、低速トルクの向上、ｕ１気中未燵炭化水素の低減等を
因ることにある。The purpose of the present invention is to reduce the amount of melt ¥1 consumed, improve low-speed torque, and reduce unburned hydrocarbons in the u1 air by improving scavenging.
以下図面により発明の適用例について詳述する。Application examples of the invention will be described in detail below with reference to the drawings.
図１は３対のＪ＋Ｊ気孔並びに３対の掃気通路を有する
空冷シュニューレｔｔｉｌ気２サイクルガソリン機閃（
気化器イ］、ボアＸストローク・＄ ５６ Ｘ ５０
、排気屓＋２５ａｏ、圧縮比７．０）に本発明を適用し
た機関の１１１１面図である。Figure 1 shows an air-cooled schneuret with three pairs of J+J air holes and three pairs of scavenging passages.
Carburetor A], bore x stroke, $56 x 50
FIG. 2 is a 1111 side view of an engine to which the present invention is applied.
図１において、掃気通路に、役けた絞り弁（１１）が全
開の時は、図１の一点ｆ！線で示すように、掃気通路の
仕切壁の一部となし、また該掃気絞り弁（１１）が全開
の時は掃気ｊ！ｌ！路（２１）と（２２）とを同時に閉
じるように、その位置、寸法が決定されている。In FIG. 1, when the throttle valve (11) serving the scavenging passage is fully open, one point f! As shown by the line, it is part of the partition wall of the scavenging passage, and when the scavenging throttle valve (11) is fully open, scavenging j! l! Its position and dimensions are determined so as to close channels (21) and (22) at the same time.
掃気の絞り弁（１１）の開度は（）ｊ４関同転敵または
機関負荷、または機関回転数と機関負荷との両方に応じ
て変えることができる。例えば、低油時においては掃気
絞り弁（１１）を全開にして掃気通路（２０）並びに１
（＋１気孔（５）のみにより最大トルクが得られるよう
に、高速時においては掃気絞り弁を全開にして掃気通路
（２０）、（２１）、（２２）並びに掃気孔（５）、（
６）、（力により最大のトルクが得られるように掃気絞
り弁の開度を設定することにより、機関の基本設ｇ１は
高ｆｌｓ惧ｌｌに合わせながら、低速時のトルクを大巾
に改善することができる。また、スロットル弁（１２）
と連動して（−４気絞り弁（１１）の開度を変更するこ
とにより低負荷から高負荷に企る掃気と燃焼を改１９す
ることができる。さらに、機関回転数と機関負荷に応じ
て掃気絞り弁（１１）の開度を変更することにより、機
関ｚｉｌ！転条件の全領域に厄って最適なトルク特性並
びに良好な燃焼の舟られる掃気系とすることが可能とな
る。The opening degree of the scavenging throttle valve (11) can be changed depending on the engine speed, the engine load, or both the engine speed and the engine load. For example, when oil is low, the scavenging throttle valve (11) is fully opened and the scavenging passage (20) and 1
(In order to obtain the maximum torque only from the +1 air hole (5), the scavenging throttle valve is fully opened at high speeds and the scavenging passages (20), (21), (22) and the scavenging holes (5), (
6) (By setting the opening of the scavenging throttle valve so that the maximum torque can be obtained by force, the engine's basic setting G1 can be adjusted to a high fls, and the torque at low speeds can be greatly improved. Also, the throttle valve (12)
In conjunction with this, by changing the opening degree of the -4 throttle valve (11), it is possible to change the scavenging and combustion from low to high loads. By changing the opening degree of the scavenging throttle valve (11), it is possible to create a scavenging system that provides optimum torque characteristics and good combustion over the entire range of engine rotation conditions.
掃気絞り弁（１１）の駆動は、ワイヤを介して手動にて
行うこともでき、或いは吸気管、クランク室、ｕト気管
等機門の一部に発生する負圧または正圧等の圧力を利用
することもできる。？ＩＬ磁力、油空圧等の外力により
駆１ｉＩＪすれば弁（１１）の開閉の面性をより適切に
決定することができる。The scavenging throttle valve (11) can be driven manually via a wire, or by controlling pressure such as negative or positive pressure generated in a part of the aircraft gate such as the intake pipe, crank chamber, or trachea. You can also use it. ? If the valve (11) is driven by an external force such as IL magnetic force or hydraulic/pneumatic pressure, the open/close orientation of the valve (11) can be determined more appropriately.
上述の如く、掃気通路の途中に絞り弁を設けることによ
り、広い運転範囲に亘って掃気通路または掃気孔と掃気
通路の両方の流路断面積を適切に設定することが可能と
なり、これにより回転数によるトルクの落ち込みや低負
荷時の不整燃焼を改善し、新気の吹き抜は損失を大１１
］に低減することができる。As mentioned above, by providing a throttle valve in the middle of the scavenging passage, it is possible to appropriately set the flow passage cross-sectional area of the scavenging passage or both the scavenging hole and the scavenging passage over a wide operating range. This improves torque drop due to the number of motors and irregular combustion at low load, and the fresh air blowout greatly reduces losses by 11%.
].
４４、図面の簡単な説明
図１は本発明を適用した機関のｌｑｉ面図で、図におい
て、（１ン・・・点火プラグ、（２）・・・シリンダヘ
ッド、（３）・・・シリンダ、（４）・・・シリンダ内
空間、（５）、（６）、（７）・・・ｈＪ気気孔（８）
・・・ｔＪ１＋１気孔９ン、（１０）−・・’ＡＪ気通
路仕切壁、（１１）・・・掃気通路絞り弁、（１２）・
・・スロットル弁、（１３）・・・吸気管、（１４）・
・・吸気化、（１５）・・・ピストン、（１６）・・・
クランク室、（１７）＝クランクケース、（１Ｂ）・・
−クランクウェブ、（１９）・・・コンロッド。44. Brief explanation of the drawings Figure 1 is an lqi plane view of an engine to which the present invention is applied, and in the figure, (1... spark plug, (2)... cylinder head, (3)... cylinder , (4)...Cylinder interior space, (5), (6), (7)...hJ pore (8)
...tJ1+1 air hole 9n, (10)-...'AJ air passage partition wall, (11)...scavenge air passage throttle valve, (12).
・・Throttle valve, (13) ・・Intake pipe, (14)・
...Intake, (15)...Piston, (16)...
Crank chamber, (17) = crank case, (1B)...
- Crank web, (19)... connecting rod.
Claims (1)
閉される掃気孔を有する２サイクル機関において、該掃
気孔に連なる掃気通路の途中に絞り弁を設け、該絞り弁
の開度を変えることに上り掃気通路或いは掃気通路と掃
気孔の両方の流路ＩＱ＋ ＋ＩＩ＋情を機関の運転条件
に応じて適切に設定するようにした２サイクル内燃機関
。 （２） シリンダ側壁に開（」シ、ピストン側面により
開閉される掃気孔を・ａする２サイクル機関において、
該ｈｊ）気孔とそれに連なる損気通路とを１Ｍ数とし、
該掃気通路の一部又は全部に絞り弁を設＋ｊ、ｆ！な絞
り弁の開度を機関の運転条件に応じて変えるようにした
２サイクル内Ｐ機関。 （５） 上記「特訂ｄ＋’Ｊ求の範囲」（２）において
、掃気通路に設けた絞り弁を掃気通路間の壁の一部とな
した２サイクル内燃機関。 （４）上記「特許請求の範囲」（１）、（２）、（３）
において、掃気通路に設けた絞り弁を、スロットルと連
動して駆動し、或いは吸気管、クランク室、排気管内の
圧力を利用して自動的に駆動し、或いは電磁力、油空圧
等の外力により駆動するようにした２サイクル内燃機関
。[Scope of Claims] (1) In a two-stroke engine having a scavenging hole that opens in the cylinder side wall and is opened and closed by the side surface of the piston, a throttle valve is provided in the middle of the scavenging passage connected to the scavenging hole, and the throttle valve is opened. A two-stroke internal combustion engine in which the flow path IQ+ +II+ information of the scavenging passage or both the scavenging passage and the scavenging hole is appropriately set according to the operating conditions of the engine. (2) In a two-stroke engine that has a scavenging hole opened in the cylinder side wall and opened and closed by the piston side,
hj) The number of pores and loss-of-air passages connected to them is 1M,
A throttle valve is provided in part or all of the scavenging passage +j, f! This is a two-cycle internal P engine that changes the throttle valve opening depending on the engine operating conditions. (5) A two-stroke internal combustion engine according to the above-mentioned "Special Edition d+'J Required Range" (2), in which the throttle valve provided in the scavenging passage is formed as part of the wall between the scavenging passages. (4) Above “Claims” (1), (2), (3)
The throttle valve installed in the scavenging passage is driven in conjunction with the throttle, or automatically using the pressure in the intake pipe, crank chamber, or exhaust pipe, or by external force such as electromagnetic force or hydraulic/pneumatic pressure. A two-stroke internal combustion engine powered by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP770084A JPS60150429A (en) | 1984-01-19 | 1984-01-19 | Two cycle internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP770084A JPS60150429A (en) | 1984-01-19 | 1984-01-19 | Two cycle internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60150429A true JPS60150429A (en) | 1985-08-08 |
Family
ID=11673036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP770084A Pending JPS60150429A (en) | 1984-01-19 | 1984-01-19 | Two cycle internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60150429A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0260283A1 (en) * | 1986-03-07 | 1988-03-23 | Bennett Automotive Technology Pty. Ltd. | Two stroke engine with isolated crankcase |
| EP0406079A2 (en) * | 1989-06-28 | 1991-01-02 | Institut Français du Pétrole | Two-stroke engine with pneumatic injection and flow throttle in at least one transfer passage |
| FR2663081A2 (en) * | 1989-06-28 | 1991-12-13 | Inst Francais Du Petrole | Two-stroke multi-cylinder engine with pneumatic injection and restriction of flow rate in its transfer ports |
-
1984
- 1984-01-19 JP JP770084A patent/JPS60150429A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0260283A1 (en) * | 1986-03-07 | 1988-03-23 | Bennett Automotive Technology Pty. Ltd. | Two stroke engine with isolated crankcase |
| EP0406079A2 (en) * | 1989-06-28 | 1991-01-02 | Institut Français du Pétrole | Two-stroke engine with pneumatic injection and flow throttle in at least one transfer passage |
| FR2649157A1 (en) * | 1989-06-28 | 1991-01-04 | Inst Francais Du Petrole | TWO-STROKE PNEUMATIC INJECTION AND FLOW RESTRICTION ENGINES IN AT LEAST ONE TRANSFER DUCT |
| FR2663081A2 (en) * | 1989-06-28 | 1991-12-13 | Inst Francais Du Petrole | Two-stroke multi-cylinder engine with pneumatic injection and restriction of flow rate in its transfer ports |
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