JPH02136509A - Two-cycle engine - Google Patents

Two-cycle engine

Info

Publication number
JPH02136509A
JPH02136509A JP7554789A JP7554789A JPH02136509A JP H02136509 A JPH02136509 A JP H02136509A JP 7554789 A JP7554789 A JP 7554789A JP 7554789 A JP7554789 A JP 7554789A JP H02136509 A JPH02136509 A JP H02136509A
Authority
JP
Japan
Prior art keywords
piston
scavenging
deflector
piston head
air
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
Application number
JP7554789A
Other languages
Japanese (ja)
Inventor
Mitsunobu Nakatani
光伸 中谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP7554789A priority Critical patent/JPH02136509A/en
Publication of JPH02136509A publication Critical patent/JPH02136509A/en
Pending legal-status Critical Current

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
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Landscapes

  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To enhance the extent of scavenging efficiency as well as to make improvements in power and fuel consumption by installing a deflector, consisting of a circular part and a partition part, in a position nearer to an outer circumference of the top of a piston, while forming plural numbers of oblong scavenging ports in a side part of the piston. CONSTITUTION:A deflector 4 consisting of a circular part 13 and a partition part 14 is formed in a slightly inner position of the top of a piston head 12 within the angular range of about one third - one half of the whole circumference of this piston head 12. Likewise plural numbers of scavenging ports 3 opened oblongly are formed in a position just below a ring 2 with the side part of a piston 1, and the inside and outside of the piston 1 are interconnected through these scavenging ports 3. On the inside surface of a cylinder 5, an oblong scavenging port 6 with such length that is in no case projected to the outside from the inside of both symmetrical ends of the partition part 14 of the deflector 4 is formed in the upper position of an intake port 8.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、掃気方法を改善した２サイクルエンジン関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a two-stroke engine with an improved scavenging method.

（従来技術） 掃気方法を改善しようとした発明、考案は多数あるが、
いまだ改善の結果を見ていない現状である。(Prior Art) There are many inventions and ideas that attempt to improve scavenging methods.
The current situation is that we have not seen any improvement results yet.

（発明が解決しようとする課題） 従来の２サイクルエンジンは、掃気が不完全なために混
合ガスと残留ガスが混じり合フて０点火が完全で無く不
整爆発をする。　　　　そのために充分な馬力が得られ
ない、燃料が不経済である、排気ガスに未燃焼の燃料が
含まれた公害が発生するなどの欠点があった。　　　　
　本発明は、掃気を改善して点火を完全にし、これらの
欠点を解消し、馬力の上昇、燃料消費の軽減、公害の減
少をはかるものである。　　　　　また従来２サイクル
エンジンでは、ピストンヘッドが過熱して、ピストンヘ
ッドに穴が開く、ピストンピン　と　コネクチングロッ
ドのメタルの潤滑が良く無い、などの欠点があったが、
本発明はこれらの欠点を解消しようとするものである。(Problems to be Solved by the Invention) In conventional two-stroke engines, because the scavenging air is incomplete, the mixed gas and residual gas mix, resulting in incomplete ignition and irregular explosion. As a result, they had drawbacks such as not being able to obtain sufficient horsepower, being uneconomical on fuel, and causing pollution due to unburned fuel in the exhaust gas.
The present invention eliminates these drawbacks by improving scavenging and perfecting ignition, increasing horsepower, reducing fuel consumption, and reducing pollution. Conventional two-stroke engines also had drawbacks such as the piston head overheating, creating holes in the piston head, and poor lubrication between the piston pin and connecting rod metal.
The present invention seeks to overcome these drawbacks.

（課題を解決するための手段） ピストンヘッド（１２）の天面の外周の僅か内側に、ピ
ストンヘッド（１２）の全周の１７３〜１／２の扇形の
範囲内に円弧部（１３）と隔壁部（１４）からなる　デ
フレクタ−（４）を設ける。(Means for Solving the Problem) A circular arc portion (13) is formed slightly inside the outer periphery of the top surface of the piston head (12) within a fan-shaped range of 173 to 1/2 of the entire circumference of the piston head (12). A deflector (4) consisting of a partition wall (14) is provided.

ピストン（１）の側面部　リング２の直下に、ピストン
ヘッドよりピストンヘッドの肉厚程度下に、デフレクタ
−４の隔壁部１４の左右両端の内側より下方に引いた　
それぞれの線より外に出ることの無いように、横長に降
口した掃気孔（３）を複数個設ける。　　　　掃気孔（
３）は、ピストン（１）の内面と外面を連通している。Side part of the piston (1) Directly below the ring 2, about the thickness of the piston head below the piston head, and pulled downward from the inside of both left and right ends of the partition wall part 14 of the deflector 4.
A plurality of horizontally elongated scavenging holes (3) are provided so that the air does not go outside the respective lines. Scavenging hole (
3) communicates the inner and outer surfaces of the piston (1).

　　　シリンダー（５）の内側面、吸気ボー１（８）の
上部に、デフレクタ−（４）の隔壁部（１４）の左右両
端の内側より外゛え出ることの無い長さと位置に横長の
掃気ボート（６）が設けられている。On the inner surface of the cylinder (5), above the intake bow 1 (8), a horizontally long scavenging boat is installed at a length and position that does not protrude from the inside of both left and right ends of the bulkhead portion (14) of the deflector (4). (6) is provided.

（作　用） 本発明の２サイクルエンジンの作用を、作用説明図第３
−１図、第３−２図、第３−３図及び第３−４図で説明
する。　　　　第３−１図は、排気開始の状況を表し　
掃気ボート６、吸気ボート８゜排気ポート９、は閉じて
いるが、前行程で吸入された混合気は、クランク室７の
中で圧縮されている。　　　　回転が進んで第３−２図
の状況になると、吸気ボート８は閉じているが、排気ポ
ート９及び掃気ボート６が開く。　　　　この際クラン
ク室７の中で圧縮されていた混合気はピストン１の内側
及び掃気ボート６を経由し、デフレクタ−４により整流
されて上方に向いシリンダー５の中に入る。　　　　　
混合気がシリンダー５に導入された結果　排気ガスは排
気ポート９より排出される。(Function) The function of the two-stroke engine of the present invention is shown in Figure 3.
This will be explained with reference to Fig.-1, Fig. 3-2, Fig. 3-3, and Fig. 3-4. Figure 3-1 shows the situation at the start of exhaust.
Although the scavenging boat 6, intake boat 8, and exhaust port 9 are closed, the air-fuel mixture taken in in the previous stroke is compressed in the crank chamber 7. When the rotation progresses to the situation shown in FIG. 3-2, the intake boat 8 is closed, but the exhaust port 9 and the scavenging boat 6 are opened. At this time, the air-fuel mixture compressed in the crank chamber 7 passes through the inside of the piston 1 and the scavenging boat 6, is rectified by the deflector 4, and enters the cylinder 5 upward.
As a result of the air-fuel mixture being introduced into the cylinder 5, exhaust gas is discharged from the exhaust port 9.

この際混合気は排気ポート９の反対側に設けられた掃気
ボート６とデフレクタ−４により整流されて上方に向か
うために、残留ガス及び混合気が層流するから、残留ガ
スと混合することが少ない。At this time, the air-fuel mixture is rectified by the scavenging boat 6 and deflector 4 provided on the opposite side of the exhaust port 9 and flows upward, so that the residual gas and the air-fuel mixture flow laminarly, so that they cannot mix with the residual gas. few.

第３−３図は、圧縮行程の開始を表しており、掃気ボー
ト６、吸気ボート８、排気ポート９は閉じている。　　
　第３−４図は、ピストン１が上死点に達し、シリンダ
ー５内の混合気の圧縮は最大。FIG. 3-3 shows the start of the compression stroke, and the scavenging boat 6, intake boat 8, and exhaust port 9 are closed.
3-4, the piston 1 has reached the top dead center and the compression of the air-fuel mixture in the cylinder 5 is at its maximum.

またクランク室７の混合気の吸気量も最大に達し。Moreover, the intake amount of the air-fuel mixture in the crank chamber 7 also reaches its maximum.

吸気ボート８のみ開き、掃気ボート６　排気ポート９は
閉じている。Only the intake boat 8 is open, and the scavenging boat 6 and exhaust port 9 are closed.

（効　果） 本発明に於いては、混合気がシリンダー５の内部に供給
される際には、掃気孔３．掃気ボート６、デフレクタ−
４の働きにより、混合気は上方に層状掃気されるので、
残留ガスと混合することが少ないから、排気ガスに混合
気が混入して排気ポート９より排気されることが少ない
。　　　　　また混合気が残留ガスと混合することが少
なく、シリンダー５の上部に供給されるので、　　点火
プラグ１５の周辺は残留ガスの混合が少ない混合気に溝
たされるから、点火が完全に行われ、完全燃焼が行われ
るから、排気ポート９より未燃焼の混合気が排出される
ことが無い。　　　　以上のごとく、不整爆発は解消さ
れ、馬力の上昇、燃料消費の軽減、公害の減少がはから
れる効果がある。(Effect) In the present invention, when the air-fuel mixture is supplied to the inside of the cylinder 5, the scavenging holes 3. Scavenging boat 6, deflector
Due to the action of 4, the air-fuel mixture is scavenged upward in layers, so
Since it is less likely to be mixed with residual gas, it is less likely that the mixture will be mixed with the exhaust gas and exhausted from the exhaust port 9. In addition, since the air-fuel mixture is less likely to mix with residual gas and is supplied to the upper part of the cylinder 5, the area around the spark plug 15 is filled with air-fuel mixture with less residual gas, so that ignition is completely performed. Since complete combustion is performed, unburned air-fuel mixture is not discharged from the exhaust port 9. As described above, irregular explosions are eliminated, and there are effects of increasing horsepower, reducing fuel consumption, and reducing pollution.

混合気がピストン１の内部と掃気孔３を経由するから、
ピストンｌが冷却されピストンヘッドの過熱を防止する
他ピストンピンとコネクチングロッドのメタルとの潤滑
が改善され、また混合気が余熱されるから熱効率が高ま
り、さらに燃料の消費量を低減する。　　　　　かくの
ごとく　本発明のものは、従来の２サイクルエンジンの
掃気の不完全による点火不良、不整爆発、不完全燃焼を
解決して、馬力の上昇、燃料消費の軽減、公害の減少を
なし得るのである。　　　　　併せて混合気によりピス
トンヘッドが冷却され、潤滑が改善され、長時間にわた
る高速回転、高負荷回転を可能にする。Since the air-fuel mixture passes through the inside of the piston 1 and the scavenging hole 3,
The piston l is cooled, preventing the piston head from overheating, improving lubrication between the piston pin and the metal of the connecting rod, and preheating the air-fuel mixture, increasing thermal efficiency and reducing fuel consumption. As described above, the present invention solves the problems of ignition failure, irregular explosion, and incomplete combustion caused by incomplete scavenging in conventional two-cycle engines, and can increase horsepower, reduce fuel consumption, and reduce pollution. be. In addition, the air-fuel mixture cools the piston head and improves lubrication, enabling long-term high-speed rotation and high-load rotation.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の２サイクルエンジンの説明断面図。 　　　　第２図は、ピストンの説明立体図。 第３−１図、第３−２図、第３−３図及び第３−４図は
９作用説明図。 １：ピストン　　　２：　リング　　　３：掃気孔４：
デフレクタ−５＝シリンダー ６：掃気ボート　　　７：クランク室 ８：吸気ボート　　　９：排気ボート １０：気化器　　　１１：混合気 １２：ピストンヘッド　　　１３：円弧部１４：隔壁部
　　　１５：点火プラグFIG. 1 is an explanatory sectional view of a two-stroke engine of the present invention. FIG. 2 is an explanatory three-dimensional diagram of the piston. 3-1, 3-2, 3-3, and 3-4 are 9 action explanatory diagrams. 1: Piston 2: Ring 3: Scavenging hole 4:
Deflector-5 = cylinder 6: scavenging boat 7: crank chamber 8: intake boat 9: exhaust boat 10: carburetor 11: mixture 12: piston head 13: arc portion 14: bulkhead portion 15: spark plug

Claims (1)

【特許請求の範囲】[Claims] ピストンヘッド（１２）の天面の外周の僅か内側に、ピ
ストンヘッドの全周の１／３〜１／２の扇形の範囲内で
円弧部（１３）と隔壁部（１４）からなるデフレクター
（４）を設け、ピストン（１）の側面部に、横長に開口
した掃気孔（３）を複数個設け、シリンダー（５）内側
面に掃気ポート（６）を設けた構造の２サイクルエンジ
ン。Slightly inside the outer periphery of the top surface of the piston head (12), a deflector (4) consisting of a circular arc portion (13) and a partition wall portion (14) is installed within a fan-shaped range of 1/3 to 1/2 of the entire circumference of the piston head. ), a plurality of laterally opened scavenging holes (3) are provided on the side surface of the piston (1), and a scavenging port (6) is provided on the inner surface of the cylinder (5).
JP7554789A 1988-08-11 1989-03-27 Two-cycle engine Pending JPH02136509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7554789A JPH02136509A (en) 1988-08-11 1989-03-27 Two-cycle engine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP20084588 1988-08-11
JP63-200845 1988-08-11
JP7554789A JPH02136509A (en) 1988-08-11 1989-03-27 Two-cycle engine

Publications (1)

Publication Number Publication Date
JPH02136509A true JPH02136509A (en) 1990-05-25

Family

ID=26416686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7554789A Pending JPH02136509A (en) 1988-08-11 1989-03-27 Two-cycle engine

Country Status (1)

Country Link
JP (1) JPH02136509A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5952131B2 (en) * 1981-05-15 1984-12-18 株式会社オリイ自動機製作所 Workpiece reversing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5952131B2 (en) * 1981-05-15 1984-12-18 株式会社オリイ自動機製作所 Workpiece reversing device

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