JPH01219310A - Four cycle engine - Google Patents
Four cycle engineInfo
- Publication number
- JPH01219310A JPH01219310A JP4411688A JP4411688A JPH01219310A JP H01219310 A JPH01219310 A JP H01219310A JP 4411688 A JP4411688 A JP 4411688A JP 4411688 A JP4411688 A JP 4411688A JP H01219310 A JPH01219310 A JP H01219310A
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- cylinder
- chamber dome
- exhaust valve
- piston
- 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
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
この発明は、燃焼室ドームに吸気弁と排気弁の間口面積
を大きく配置できて、高出力高性を化できる西サイクル
エンジンに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a west cycle engine in which the intake valve and exhaust valve can be arranged in a combustion chamber dome with a large frontage area, thereby achieving high output and high performance.
（従来の技術とその問題点〕
一般に、四サイクルエンジンは、円筒状のシリンダーに
円筒状のピストンが摺動自在に挿入され、シリンダーの
上面に連結するシリンダーヘッドの燃焼室ドームもシリ
ンダーの断面形状に合せて円形に形成してあり、燃焼室
ドームに吸気弁及び排気弁が設けられている。吸気弁及
び排気弁は、傘型弁で円形をしており、四弁式にしても
開口面積が限定され、燃焼室ドーム面積を有効に用いる
ことができずデッドスペースができて、間口面積が制限
される。このため、吸気効率及び排気効率に限界がある
。シリンダー及びピストンの断面形状を楕円形にしたり
長円形にして、燃焼室ドームもこれに合せて楕円形にし
たり長円形にしたごらのがある。例えば、実開昭５７−
１８７４３号公報、実開昭６１−１３７８６６号公報参
照。この場合は、吸気弁及び排気弁を横並べにして多弁
化を図るには有効であるが、燃焼室ドームに吸気弁及び
排気弁の開口面に利用できる面積に限界があって、吸気
効率及び排気効率に限疫がある。(Prior art and its problems) In general, a four-cycle engine has a cylindrical piston slidably inserted into a cylindrical cylinder, and the combustion chamber dome of the cylinder head connected to the top surface of the cylinder also has a cross-sectional shape of the cylinder. The intake valve and exhaust valve are provided in the combustion chamber dome.The intake valve and exhaust valve are umbrella-shaped and circular, and even if the four-valve type is used, the opening area is small. is limited, and the dome area of the combustion chamber cannot be used effectively, creating a dead space and limiting the frontage area.Therefore, there is a limit to intake efficiency and exhaust efficiency.The cross-sectional shape of the cylinder and piston is oval. There are some that have a shape or an oval shape, and the combustion chamber dome is also oval or oval to match this.For example,
See Japanese Utility Model Publication No. 18743 and Japanese Utility Model Application Publication No. 137866/1983. In this case, it is effective to arrange the intake valves and exhaust valves side by side to increase the number of valves, but there is a limit to the area available for the opening surfaces of the intake valves and exhaust valves in the combustion chamber dome, which reduces the intake efficiency. There is a limit to exhaust efficiency.
この発明は、シリンダー及びピストンの断面形状をおむ
すび形にすると共に、これに合せて燃焼室ドームの形状
もおむすび形にし、一つの排気弁と複数の吸気弁を燃焼
室ドームの形状を有効に利用して間口面積を大きく配置
できて、吸気効率及び排気効率を向上し、高出力高性能
化ができる四サイクルエンジンを得ることを目的とする
。In this invention, the cross-sectional shapes of the cylinder and piston are shaped like a rice ball, and the shape of the combustion chamber dome is also shaped like a rice ball, so that one exhaust valve and a plurality of intake valves effectively utilize the shape of the combustion chamber dome. The purpose of the present invention is to provide a four-cycle engine that can be arranged with a large frontage area, improve intake efficiency and exhaust efficiency, and achieve high output and performance.
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 explained with reference to embodiments shown in the drawings.
第１図及び第２図は、本発明の一実施例を示すものであ
る。シリンダー１には、ピストン２が往復摺動するよう
に挿入してあり、シリンダー１の上面に連結するシリン
ダーヘッド３には、シリンダー１に合せて燃焼室ドーム
４が設けである。シリンダー１及びピストン２の断面形
状と、燃焼室ドーム４の形状は、三隅の小円弧５を大き
い円弧６でむすんだおむすび形の形状にしである。燃焼
室ドーム４には、一方の隅に寄せて排気弁７を設け、他
の二つの隅に寄せて二つの吸気弁８が設けである。尚、
排気弁７及び吸気弁８は、傘型弁で、バネに抗して押下
げて開くようにしである。そして、排気弁７及び吸気弁
８には、排気孔９と吸気孔１０が各々通じている。燃焼
室ドーム４の略中央には、点火栓１１が螺着してあり、
燃焼室ドーム４の大きい円弧６の内側には、スキッシュ
ゾーン１２が設けである。1 and 2 show an embodiment of the present invention. A piston 2 is inserted into the cylinder 1 so as to reciprocate and slide therein, and a cylinder head 3 connected to the upper surface of the cylinder 1 is provided with a combustion chamber dome 4 to match the cylinder 1. The cross-sectional shapes of the cylinder 1 and piston 2 and the shape of the combustion chamber dome 4 are rice ball-shaped, with small arcs 5 at the three corners connected by large arcs 6. The combustion chamber dome 4 is provided with an exhaust valve 7 near one corner, and two intake valves 8 near the other two corners. still,
The exhaust valve 7 and the intake valve 8 are umbrella-shaped valves that are opened by being pushed down against a spring. An exhaust hole 9 and an intake hole 10 communicate with the exhaust valve 7 and the intake valve 8, respectively. An ignition plug 11 is screwed approximately in the center of the combustion chamber dome 4.
A squish zone 12 is provided inside the large arc 6 of the combustion chamber dome 4.
第３図は本発明の他の実施例を示すものである。FIG. 3 shows another embodiment of the invention.
この場合は、第１図及び第２図の一つの１１気弁７と二
つの吸気弁８の代りに、おむすび形の燃焼室ドーム４の
一方の隅に奇ぜて一つの排気弁７が設けてあり、他の側
に、三つの吸気弁８が設けである。その他は第１図及び
第二図に示したものと同じである。In this case, instead of one 11-air valve 7 and two intake valves 8 in FIGS. 1 and 2, one exhaust valve 7 is installed at one corner of the rice ball-shaped combustion chamber dome 4. On the other side, three intake valves 8 are provided. Others are the same as shown in FIGS. 1 and 2.
（発明の作用〕
シリンダー１及びピストン２の断面形状と燃焼室−ドー
ム４の形状を三隅の小円弧５を大きい円弧６で結んだお
むすび形にしたので、円形の一つの排気弁７と複数の吸
気弁８を燃焼室ドーム４に有効に配置でき、同じ面積の
円形の燃焼室ドームに較べて、排気弁７及び吸気弁８の
開口面積を大きくできる。このため、吸排気効率が向上
して、高出力高性能エンジンにすることができる。(Operation of the invention) Since the cross-sectional shapes of the cylinder 1 and the piston 2 and the shape of the combustion chamber-dome 4 are shaped like a rice ball in which small arcs 5 at the three corners are connected by a large arc 6, one circular exhaust valve 7 and a plurality of The intake valve 8 can be effectively arranged in the combustion chamber dome 4, and the opening area of the exhaust valve 7 and the intake valve 8 can be made larger compared to a circular combustion chamber dome with the same area.Therefore, the intake and exhaust efficiency is improved. , can be made into a high-output, high-performance engine.
以上説明したように、この発明は、三隅の小円弧を大き
い円弧で結んだ断面おむすび形のシリンダーとピストン
を設け、シリンダー上面に連結するシリンダーヘッドの
燃焼室ドームを同様におむすび形にし、一方の隅に排気
弁を設け、その他の部分に複数の吸気弁を設け、略中央
に点火栓を設けたので、同じ面積の円形の燃焼室ドーム
に較べて、燃焼室ドームの面積を有効に使用できて、吸
気弁及び排気弁の開口面積を大きくできて、吸気効率及
び排気効率を共に向上できる。そして、点火栓が中央に
配置できて燃焼効率もよく、高出力高性能エンジンにす
ることができる。As explained above, this invention provides a cylinder and a piston with a cross-section shaped like a rice ball, in which small arcs at the three corners are connected by a large arc, the combustion chamber dome of the cylinder head connected to the top surface of the cylinder is similarly shaped like a rice ball, and one of the cylinders is shaped like a rice ball. An exhaust valve is provided in the corner, multiple intake valves are provided in other parts, and a spark plug is provided approximately in the center, so the area of the combustion chamber dome can be used more effectively than a circular combustion chamber dome with the same area. Therefore, the opening areas of the intake valve and exhaust valve can be increased, and both intake efficiency and exhaust efficiency can be improved. Additionally, the ignition plug can be placed in the center, resulting in better combustion efficiency and a high-output, high-performance engine.
第１図及び第２図は本発明の一実施例を示し、第１図は
第２図ｘ−Ｘ矢視縦断面図、第２図は燃焼室ドームの内
側面図、第３図は本発明の他の実施例を示す燃焼室ドー
ムの内側面図である。
１・・・シリンダー、２・・・ピストン、３・・・シリ
ンダーヘッド、４・・・燃焼室ドーム、５・・・小円弧
、６・・・大きい円弧、７・・・排気弁、８・・・吸気
弁、１１・・・点火栓。
出願人代理人 膝 木 博 光茅１凪1 and 2 show one embodiment of the present invention, FIG. 1 is a vertical sectional view taken along the line x--X in FIG. 2, FIG. 2 is an internal side view of the combustion chamber dome, and FIG. FIG. 7 is an inner side view of a combustion chamber dome showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Cylinder, 2... Piston, 3... Cylinder head, 4... Combustion chamber dome, 5... Small circular arc, 6... Large circular arc, 7... Exhaust valve, 8... ...Intake valve, 11...Spark plug. Applicant's agent: Hiroshi Hizuki, Ichinagi Mitsukayanagi
Claims (1)
リンダーとピストンを設け、シリンダー上面に連結する
シリンダーヘッドの燃焼室ドームを同様におむすび形に
し、一方の隅に排気弁を設け、その他の部分に複数の吸
気弁を設け、略中央に点火栓を設けたことを特徴とする
四サイクルエンジン。The cylinder and piston are shaped like a rice ball in cross section, connecting the small arcs at the three corners with a larger arc, and the combustion chamber dome of the cylinder head connected to the top of the cylinder is similarly shaped like a rice ball. An exhaust valve is installed at one corner, and the rest of the cylinder is shaped like a rice ball. A four-cycle engine that is characterized by having multiple intake valves and an ignition plug located approximately in the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4411688A JPH01219310A (en) | 1988-02-29 | 1988-02-29 | Four cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4411688A JPH01219310A (en) | 1988-02-29 | 1988-02-29 | Four cycle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01219310A true JPH01219310A (en) | 1989-09-01 |
Family
ID=12682633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4411688A Pending JPH01219310A (en) | 1988-02-29 | 1988-02-29 | Four cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01219310A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110799736A (en) * | 2017-09-26 | 2020-02-14 | 宝马股份公司 | internal combustion engine |
-
1988
- 1988-02-29 JP JP4411688A patent/JPH01219310A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110799736A (en) * | 2017-09-26 | 2020-02-14 | 宝马股份公司 | internal combustion engine |
| US11125181B2 (en) | 2017-09-26 | 2021-09-21 | Bayerische Motoren Werke Aktiengesellschaft | Internal combustion engine |
| CN110799736B (en) * | 2017-09-26 | 2021-10-29 | 宝马股份公司 | internal combustion engine |
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