JPS6232326B2 - - Google Patents
Info
- Publication number
- JPS6232326B2 JPS6232326B2 JP54111448A JP11144879A JPS6232326B2 JP S6232326 B2 JPS6232326 B2 JP S6232326B2 JP 54111448 A JP54111448 A JP 54111448A JP 11144879 A JP11144879 A JP 11144879A JP S6232326 B2 JPS6232326 B2 JP S6232326B2
- Authority
- JP
- Japan
- Prior art keywords
- sub
- main
- stroke engine
- reed valve
- intake system
- 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
- 235000014676 Phragmites communis Nutrition 0.000 claims description 15
- 230000002000 scavenging effect Effects 0.000 claims description 5
- 239000000446 fuel Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000006200 vaporizer Substances 0.000 description 2
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
- Supercharger (AREA)
Description
【発明の詳細な説明】
本発明は、オートバイ等に搭載される２サイク
ルエンジンに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-stroke engine mounted on a motorcycle or the like.
本発明の目的は、２サイクルエンジンの混合気
の吸入量の増大を図りあるいは吸入効率を高く
し、同時に掃気効率を向上して出力の増大を図り
得る２サイクルエンジンを提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a two-stroke engine that can increase the intake amount of air-fuel mixture or increase the intake efficiency, and simultaneously improve the scavenging efficiency and increase the output.
以下、本発明の実施例を図に基づいて説明す
る。 Embodiments of the present invention will be described below based on the drawings.
第１図ないし第３図は本発明の第一実施例を示
し、２サイクルエンジン１は、エアクリーナー２
と主気化器３とインテークポート４とから成る主
吸入系を有し、この主吸入系の主気化器３とイン
テークポート４との間にはリードバルブ５，５，
５が介装されている。そして、主気化器３で形成
された混合気はバネ定数の大きい高速型のリード
バルブ５，５，５、インテークポート４を経て２
サイクルエンジン１のクランク室（図示せず）に
至り、クランク室で圧縮された後掃気通路（図示
せず）を通つてシリンダ内へ入り、シリンダ１ａ
内で燃焼してエキゾーストポート６から排出され
ることになる。 1 to 3 show a first embodiment of the present invention, in which a two-stroke engine 1 includes an air cleaner 2
It has a main intake system consisting of a main carburetor 3 and an intake port 4, and between the main carburetor 3 and intake port 4 of this main intake system, there are reed valves 5, 5,
5 is interposed. The air-fuel mixture formed in the main carburetor 3 then passes through the high-speed reed valves 5, 5, 5 with a large spring constant, and the intake port 4.
It reaches the crank chamber (not shown) of the cycle engine 1, and after being compressed in the crank chamber, it passes through the scavenging passage (not shown) and enters the cylinder.
The fuel will be burned inside and will be discharged from the exhaust port 6.
そして、２サイクルエンジン１のシリンダ１ａ
に、一端を掃気通路に開口したポート７，７′を
形成し、これらのポート７，７′の他端にそれぞ
れ副気化器８，８′を連結して、副吸入系を構成
する。副気化器８，８′とポート７，７′との間に
はバネ定数の小さい低速型のリードバルブ９，
９′を介装し、また、副気化器８，８′はそれぞれ
エアクリーナ２に接続されている。 Then, the cylinder 1a of the two-stroke engine 1
Ports 7, 7' with one end open to the scavenging passage are formed, and sub-carburizers 8, 8' are connected to the other ends of these ports 7, 7', respectively, thereby forming a sub-intake system. A low-speed reed valve 9 with a small spring constant is installed between the sub-carburizers 8, 8' and the ports 7, 7'.
9' is interposed therebetween, and the auxiliary carburetors 8 and 8' are each connected to the air cleaner 2.
次に、第４図ないし第６図は、本発明の第二実
施例を示し、本実施例の特徴とするところは、２
つの副吸入系の副気化器を単一の副気化器１０で
共用した点にある。副気化器１０を単一としたこ
とにともない、２サイクルエンジン１′のシリン
ダ１′ａに形成された掃気通路（図示せず）に一
端を開口したポート１１，１１′と副気化器１０
とは分岐管１２をもつて接続されることとなる。
１３，１３′は副吸入系に介装されたリードバル
ブを、また、１０′は副気化器１０用のエアクリ
ーナをそれぞれ示す。その他の構成は第一実施例
と同様であり、主気化器１４、リードバルブ１
５、インテークポート１６、エキゾーストポート
１７、そして主気化器１４用のエアクリーナ１
４′はそれぞれ前記第一実施例と同一の機能をは
たす。 Next, FIGS. 4 to 6 show a second embodiment of the present invention, and the features of this embodiment are as follows:
The main feature is that the sub-vaporizers of the two sub-inhalation systems are shared by a single sub-vaporizer 10. Since the auxiliary carburetor 10 is made into a single unit, the auxiliary carburetor 10 and ports 11, 11' each have one end open to a scavenging passage (not shown) formed in the cylinder 1'a of the two-stroke engine 1'.
and will be connected through a branch pipe 12.
Reference numerals 13 and 13' indicate reed valves installed in the sub-intake system, and 10' indicates an air cleaner for the sub-vaporizer 10, respectively. The other configurations are the same as the first embodiment, including a main carburetor 14, a reed valve 1
5. Air cleaner 1 for intake port 16, exhaust port 17, and main carburetor 14
4' respectively perform the same functions as in the first embodiment.
上記第一及び第二実施例で示したような構成を
とることにより、本発明の２サイクルエンジンで
は、主吸入系から吸入される混合気に加えて副吸
入系からも同様に混合気が吸入されるので、混合
気の吸入量及び吸入効率が増大するという効果を
生ずる。 By adopting the configurations shown in the first and second embodiments, the two-stroke engine of the present invention allows the air-fuel mixture to be sucked in from the auxiliary suction system in addition to the air-fuel mixture sucked in from the main suction system. This has the effect of increasing the intake amount and intake efficiency of the air-fuel mixture.
また、主吸入系に介装されているリードバルブ
は、そのバネ特性によつて効率の良い作動範囲が
自ら限定されるので、レシプロ運動によつて発生
するパルセート波の圧力に充分に呼応出来ないも
のであつた。そこで、従来は主吸入系においてバ
ネ常数の大きな高速用のリードバルブとバネ常数
の小さな低速用のリードバルブとを組合せて使用
していたが、これによつても未だ、充文な結果が
得られていなかつた。しかし、本発明の２サイク
ルエンジンによれば、副吸入系と主吸入系とはそ
れぞれ独立のリードバルブを有するから、副吸入
系のリードバルブに低速域を受持たせ、主吸入系
のリードバルブに高速域を受持たせることによ
り、自由度が増大し、従来よりもより良好な結果
が得られるという効果が生ずる。 In addition, the reed valve installed in the main suction system has a limited effective operating range due to its spring characteristics, so it cannot respond sufficiently to the pressure of the pulsate wave generated by reciprocating motion. It was hot. Therefore, in the past, a high-speed reed valve with a large spring constant and a low-speed reed valve with a small spring constant were used in combination in the main suction system, but even with this, satisfactory results still cannot be obtained. It wasn't. However, according to the two-stroke engine of the present invention, since the auxiliary suction system and the main suction system each have independent reed valves, the reed valve of the auxiliary suction system is in charge of the low speed range, and the reed valve of the main suction system is By assigning the high-speed range to the engine, the degree of freedom is increased and better results can be obtained than in the past.
更に、本発明の２サイクルエンジンによれば広
範囲な出力及び走行能力の要求特性に呼応できる
という効果も当然に生ずる。 Furthermore, the two-stroke engine of the present invention naturally has the effect of being able to meet a wide range of required characteristics of output and running performance.
第１図は本発明の２サイクルエンジンの第一実
施例の概略平面図、第２図は第１図の正面図、第
３図は第１図の要部断面図、第４図は本発明の２
サイクルエンジンの第二実施例の概略平面図、第
５図は第４図の正面図、第６図は第４図の要部断
面図である。
１，１′……２サイクルエンジン、２，１０，
１４……エアクリーナ、３，１４……主気化器、
４，１６……インテークポート、５，９，９′，
１３，１３′，１５……リードバルブ、６，１７
……エキゾーストポート、８，８′，１０……副
気化器。
FIG. 1 is a schematic plan view of a first embodiment of the two-stroke engine of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a sectional view of the main part of FIG. 2
A schematic plan view of a second embodiment of the cycle engine, FIG. 5 is a front view of FIG. 4, and FIG. 6 is a sectional view of a main part of FIG. 4. 1,1'...2-stroke engine, 2,10,
14...Air cleaner, 3,14...Main carburetor,
4, 16...Intake port, 5, 9, 9',
13, 13', 15... Reed valve, 6, 17
...Exhaust port, 8, 8', 10...Sub carburetor.
Claims (1)
に至る主吸入系を有する２サイクルエンジンにお
いて、該２サイクルエンジンの掃気通路に副気化
器を接続して副吸入系を形成すると共に、前記主
吸入系にバネ定数の大きい高速型のリードバルブ
を介装し、前記副吸入系にはバネ定数の小さい低
速型のリードバルブを介装したことを特徴とする
２サイクルエンジン。1. In a two-stroke engine having a main intake system that extends from the main carburetor to the crank chamber via a reed valve, a sub-carburizer is connected to the scavenging passage of the two-stroke engine to form a sub-intake system, and the main intake system A two-stroke engine characterized in that a high-speed reed valve with a large spring constant is installed in the sub-intake system, and a low-speed reed valve with a small spring constant is installed in the sub-intake system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11144879A JPS5634923A (en) | 1979-08-31 | 1979-08-31 | Two-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11144879A JPS5634923A (en) | 1979-08-31 | 1979-08-31 | Two-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5634923A JPS5634923A (en) | 1981-04-07 |
| JPS6232326B2 true JPS6232326B2 (en) | 1987-07-14 |
Family
ID=14561453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11144879A Granted JPS5634923A (en) | 1979-08-31 | 1979-08-31 | Two-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5634923A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59105027U (en) * | 1982-12-29 | 1984-07-14 | 川崎重工業株式会社 | 2 cycle engine |
| JPS63189615A (en) * | 1987-01-31 | 1988-08-05 | Maruyama Seisakusho:Kk | Scavenging device for two stroke cycle engine |
| DE10009793A1 (en) * | 2000-03-01 | 2001-09-06 | Stihl Maschf Andreas | 2-stroke engine with adjustable charge for chain saws etc. has overflow channels connected to air feed channels with adjustable throttles for different air flow volume in individual channels |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53117108A (en) * | 1977-03-23 | 1978-10-13 | Suzuki Motor Co Ltd | 2 cycle engine |
-
1979
- 1979-08-31 JP JP11144879A patent/JPS5634923A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53117108A (en) * | 1977-03-23 | 1978-10-13 | Suzuki Motor Co Ltd | 2 cycle engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5634923A (en) | 1981-04-07 |
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