JP2545548B2 - Two cycle engine - Google Patents
Two cycle engineInfo
- Publication number
- JP2545548B2 JP2545548B2 JP62193785A JP19378587A JP2545548B2 JP 2545548 B2 JP2545548 B2 JP 2545548B2 JP 62193785 A JP62193785 A JP 62193785A JP 19378587 A JP19378587 A JP 19378587A JP 2545548 B2 JP2545548 B2 JP 2545548B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- crank
- supercharging
- cylinder
- dead center
- 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 - Lifetime
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
- Supercharger (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、一次圧縮比を高めて高出力にできる二サ
イクルエンジンに関する。TECHNICAL FIELD The present invention relates to a two-cycle engine capable of increasing the primary compression ratio to achieve high output.
〔従来の技術とその問題点〕 二サイクルエンジンは、ピストンが上昇行程のとき、
吸気ガスをクランク室内に吸入し、ピストンの下降によ
って、吸気ガスをクランク室内で一次圧縮し、ピストン
が下死点付近で、一次圧縮した吸気ガスを掃気孔を通し
て燃焼室に注入し、ピストンの上昇で燃焼室の吸気ガス
を二次圧縮し、上死点付近で点火燃焼させて出力を得て
いる。従って、燃焼室への吸気ガスの充填効率を高めて
高出力を得るには、クランク室内での一次圧縮比を高め
る必要がある。クランク室の容積変化は、ピストンの可
動する容積だけで、クランクホイール、ピストンストロ
ークなどの関係で、クランク室の容積を小さくするには
限界があって、一定以上に一次圧縮比を高めることがで
きない。クランク室に通じる過給ピストンを設けて、一
次圧縮比を高めるようにしたものが、特開昭59-229016
号公報に示されているが、過給ピストンの駆動が複雑
で、吸排気弁が必要であるなど、構造が複雑で、大巾に
製造コストが高くつく不便がある。[Conventional technology and its problems] In the two-cycle engine, when the piston is in the upward stroke,
The intake gas is sucked into the crank chamber, and the piston is lowered to perform primary compression of the intake gas in the crank chamber.At the piston's vicinity of bottom dead center, the primary compressed intake gas is injected into the combustion chamber through the scavenging hole, and the piston is raised. In this way, the intake gas in the combustion chamber is secondarily compressed and ignited and burned near the top dead center to obtain the output. Therefore, it is necessary to increase the primary compression ratio in the crank chamber in order to increase the efficiency of filling the combustion chamber with intake gas and obtain a high output. The volume change of the crank chamber is only the movable volume of the piston, and there is a limit to reducing the volume of the crank chamber due to the relationship of the crank wheel, piston stroke, etc., and the primary compression ratio cannot be increased above a certain level. . Japanese Patent Laid-Open No. 59-229016 discloses a turbocharger that is connected to the crank chamber to increase the primary compression ratio.
As disclosed in Japanese Patent Laid-Open Publication No. JP-A No. 2003-242242, the driving of the supercharging piston is complicated, and an intake / exhaust valve is required.
この発明は、クランク角が180°位相する二つの二サ
イクルエンジンのクランクケースを並べてシリンダーで
連通し、このシリンダー内に過給ピストンを摺動させ
て、一次圧縮比を高め、燃焼室内への吸気ガスの充填効
率を高めて高出力が得られる二サイクルエンジンを得る
ことを目的とする。According to the present invention, the crankcases of two two-cycle engines whose crank angles are 180 ° in phase are arranged side by side and communicated with each other by a cylinder, and a supercharging piston is slid into the cylinder to increase the primary compression ratio, thereby increasing the intake air into the combustion chamber. It is an object of the present invention to obtain a two-cycle engine capable of enhancing gas filling efficiency and obtaining high output.
以下、本発明を図面に示す実施例によって説明する。 Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.
二つの二サイクルエンジンのクランクケース１を並べ
てシリンダー２で連通させる。二つのクランクケース１
には、各々クランクシャフト３が回転自在に軸架してあ
り、クランクシャフト３のクランクホイール４には、コ
ネクチングロッド５を介してピストン６が連結してあ
り、ピストン６はシリンダー７内に所定ストローク摺動
する。二つのクランクシャフト３は歯車などで、一方の
ピストン６が上死点のとき、他方のピストン６が下死点
になるように、180°位相させて連動させる。二つのク
ランクケース１には、リード弁９を挿入した吸気孔10が
あり、クランクケース１とシリンダー７の上部の燃焼室
11とは掃気孔12で連通させてあり、燃焼室11には排気孔
13を設け、燃焼室11の上端に点火栓14を連結してある。
シリンダー２内には、仕切壁になる過給ピストン15を摺
動自在に挿入し、過給ピストン15はコネクチングロッド
16で、片側のクランクホイール４に連結する。過給ピス
トン15は、クランクシャフト３の回転に連動し、ピスト
ン６が下降行程になる側のクランク室17の容積を小さく
するように摺動する。The crankcases 1 of the two two-cycle engines are arranged side by side and are connected by the cylinder 2. Two crankcases 1
, A crankshaft 3 is rotatably mounted on the crankshaft 3, and a crankwheel 4 of the crankshaft 3 is connected to a piston 6 via a connecting rod 5. The piston 6 has a predetermined stroke in a cylinder 7. Slide. The two crankshafts 3 are gears or the like, and are interlocked by being phased by 180 ° so that when one piston 6 is at the top dead center, the other piston 6 is at the bottom dead center. The two crankcases 1 have intake holes 10 into which the reed valves 9 are inserted, and the combustion chambers above the crankcase 1 and cylinder 7
11 is connected to the scavenging hole 12, and the combustion chamber 11 has an exhaust hole.
13, a spark plug 14 is connected to the upper end of the combustion chamber 11.
A supercharging piston 15 that serves as a partition wall is slidably inserted into the cylinder 2, and the supercharging piston 15 is a connecting rod.
At 16, connect to the crank wheel 4 on one side. The supercharging piston 15 is interlocked with the rotation of the crankshaft 3 and slides so as to reduce the volume of the crank chamber 17 on the side where the piston 6 moves downward.
ピストン６が上昇するときは、過給ピストン15も離れ
る側に摺動して、多くの吸気ガスを吸気孔10からクラン
ク室17内に吸入する。ピストン６が上死点を過ぎて下行
行程に移ると、過給ピストン15も圧縮行程になり、クラ
ンク室17の容積を小さくして、一次圧縮比を高める。そ
して、一次圧縮された吸気ガスは、ピストン６の下死点
付近で、掃気孔12を通って、燃焼室11に圧送される。ピ
ストン６の上昇に伴って、燃焼室11内の吸気は二次圧縮
され、上死点付近で点火栓14で着火されて燃焼し、ピス
トン６を押下げ、排気孔13に排出する。一次圧縮比が過
給ピストン15によって高くなり、燃焼室11への吸気ガス
の充填効率が高くなり、高出力が得られる。When the piston 6 rises, the supercharging piston 15 also slides away and sucks a large amount of intake gas into the crank chamber 17 from the intake hole 10. When the piston 6 passes the top dead center and moves to the downward stroke, the supercharging piston 15 also goes into the compression stroke, reducing the volume of the crank chamber 17 and increasing the primary compression ratio. Then, the primarily compressed intake gas is pressure-fed to the combustion chamber 11 through the scavenging hole 12 near the bottom dead center of the piston 6. As the piston 6 rises, the intake air in the combustion chamber 11 is secondarily compressed, ignited by the spark plug 14 near the top dead center and burned, and the piston 6 is pushed down and discharged to the exhaust hole 13. The primary compression ratio is increased by the supercharging piston 15, the efficiency of filling the combustion chamber 11 with intake gas is increased, and high output is obtained.
以上説明したように、この発明は、二つの二サイクル
エンジンのクランクケースを並べてシリンダーで連通
し、一方のピストンが下死点のとき他方のピストンが上
死点になるように二つのクランクシャフトを歯車などで
連動させ、シリンダー内に摺動自在に挿入した過給ピス
トンをコネクチングロッドで一方のクランクホイールに
連結し、二つのクランクケースが各々ピストンが下降行
程のとき過給ピストンがクランク室容積が小さくなるよ
うに摺動させるようにしたので、過給ピストンの摺動に
よって、クランク室に吸入する吸気ガスの量を増し、
又、クランク室での吸気ガスの一次圧縮比を高めて、燃
焼室に圧送する吸気ガス量を増して、充填効率を高め、
高出力にできる。過給ピストンは、二つのクランク室に
一つでよく、又、コネクチングロッドで一方のクランク
ホイールに連結すればよく、構造が簡単で低コストで実
施できる。又、過給ピストンは、二つのクランク室に対
し一つでよいので、メカロスも小さくできる。As described above, according to the present invention, the crankcases of two two-cycle engines are arranged side by side and communicate with each other by a cylinder, and the two crankshafts are arranged so that when one piston is at bottom dead center, the other piston is at top dead center. The supercharging piston, which is interlocked with gears and slidably inserted in the cylinder, is connected to one crank wheel with a connecting rod.When the two crankcases are each in the downward stroke, the supercharging piston has a smaller crank chamber volume. Since it is slid so as to be small, the amount of intake gas sucked into the crank chamber is increased by sliding the supercharging piston.
In addition, the primary compression ratio of the intake gas in the crank chamber is increased to increase the amount of intake gas that is pressure-fed to the combustion chamber, and the charging efficiency is increased.
High output can be achieved. The supercharging piston may be one in each of the two crank chambers, or may be connected to one of the crank wheels by a connecting rod, which has a simple structure and can be implemented at low cost. Further, since only one supercharging piston is required for the two crank chambers, the mechanical loss can be reduced.
図は本発明の一実施例を示す縦断面図である。 １……クランクケース、２……シリンダー、３……クラ
ンクシャフト、４……クランクホイール、６……ピスト
ン、８……歯車、15……過給ピストン、16……コネクチ
ングロッド。FIG. 1 is a vertical sectional view showing an embodiment of the present invention. 1 ... Crank case, 2 ... Cylinder, 3 ... Crank shaft, 4 ... Crank wheel, 6 ... Piston, 8 ... Gear, 15 ... Supercharged piston, 16 ... Connecting rod.
Claims (1)
スを並べてシリンダーで連通し、一方のピストンが下死
点のとき他方のピストンが上死点になるように二つのク
ランクシャフトを歯車などで連動させ、シリンダー内に
摺動自在に挿入した過給ピストンをコネクチングロッド
で一方のクランクホイールに連結し、二つのクランクケ
ースが各々ピストンが下降行程のとき過給ピストンがク
ランク室容積が小さくなるように摺動させるようにした
ことを特徴とする二サイクルエンジン。1. Crankcases of two two-cycle engines are arranged side by side and communicate with each other by a cylinder, and two crankshafts are interlocked by gears so that when one piston is at bottom dead center, the other piston is at top dead center. , Connect the supercharging piston slidably inserted in the cylinder to one crank wheel with the connecting rod, and slide the two supercharging pistons so that the crank chamber volume becomes smaller when the pistons are in the downward stroke. A two-cycle engine characterized by being operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62193785A JP2545548B2 (en) | 1987-08-04 | 1987-08-04 | Two cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62193785A JP2545548B2 (en) | 1987-08-04 | 1987-08-04 | Two cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6441615A JPS6441615A (en) | 1989-02-13 |
| JP2545548B2 true JP2545548B2 (en) | 1996-10-23 |
Family
ID=16313757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62193785A Expired - Lifetime JP2545548B2 (en) | 1987-08-04 | 1987-08-04 | Two cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2545548B2 (en) |
-
1987
- 1987-08-04 JP JP62193785A patent/JP2545548B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6441615A (en) | 1989-02-13 |
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