JPS61218716A - Intake device of engine for motorcycle - Google Patents
Intake device of engine for motorcycleInfo
- Publication number
- JPS61218716A JPS61218716A JP61035589A JP3558986A JPS61218716A JP S61218716 A JPS61218716 A JP S61218716A JP 61035589 A JP61035589 A JP 61035589A JP 3558986 A JP3558986 A JP 3558986A JP S61218716 A JPS61218716 A JP S61218716A
- Authority
- JP
- Japan
- Prior art keywords
- reed valve
- engine
- crankcase
- valve main
- flange
- 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.)
- Granted
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
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/02—Other fluid-dynamic features of induction systems for improving quantity of charge
-
- 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
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
-
- 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
-
- 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
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1816—Number of cylinders four
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は自動二輪車用エンジンの吸気装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an intake device for a motorcycle engine.
（従来の技術）
自１１ｈ−ｍ ！ ／Ｆｌ −Ｐ −／ ｘ’： 、／
Ｉｆ ＩＪ Ｑ ａノ）ｌ ＋１． 〒”Ｉ’ ＸＭ
’／が用いられる場合があり、この場合には、一般に
、エンジンと気化器の間にリードバルブが介設される。(Conventional technology) 11h-m! /Fl-P-/x': ,/
If IJ Q ano)l +1. 〒"I'XM"
'/ may be used, in which case a reed valve is generally interposed between the engine and the carburetor.
２サイクルエンジンではクランク軸が１回転する間に１
サイクルが完了し、ピストンの上昇時クランクケース内
の負圧により新気がリードバルブを通ってクランクケー
ス内に吸入され、次にピストンの下降によって、このク
ランクケース内で圧縮された混合気がシリンダに設けら
れた掃気通路を通ってシリンダ内に送り込まれる。In a 2-stroke engine, 1 rotation is made during one revolution of the crankshaft.
When the cycle is complete, the negative pressure in the crankcase as the piston rises draws fresh air into the crankcase through the reed valve, and then as the piston descends, the air-fuel mixture compressed in the crankcase is pumped into the cylinder. It is sent into the cylinder through a scavenging passage provided in the cylinder.
前記リードバルブは一般にエンジンの吸気通路の開口縁
にねじ止めされるフランジと、このフランジに一端開口
部が連結され他端が吸気通路内に向って突設される箱状
のリードバルブ本体を備え、このリードバルブ本体は気
化器からの混合気を吸気通路内に向ってのみ流動させ、
また混合気の逆流を規制している。The reed valve generally includes a flange that is screwed to the opening edge of an engine intake passage, and a box-shaped reed valve body that has one end connected to the flange and the other end protruding into the intake passage. , this reed valve body allows the air-fuel mixture from the carburetor to flow only into the intake passage,
It also restricts the backflow of the mixture.
（発明が解決しようとする問題点）
斯かる従来の吸気装置においてリードバルブ木汰ｌ＋フ
ランシネ春１ゴ嘔架通蕗の朋口七に臣結方持されるため
、リードバルブ本体はエンジンの作動や走行中の振動に
より振動し易い傾向となる。(Problem to be Solved by the Invention) In such a conventional intake system, since the reed valve is connected to the reed valve, the reed valve body is connected to the engine operation. It tends to vibrate easily due to vibrations during driving.
このような振動が生じた場合には、この振動の影響によ
り気化器のフロート室油面に波立ちが生じて気化器の機
能が不安定となるおそれがある。また、この場合、リー
ドバルブの強度を向上させようとしてリードバルブの嵩
を大きくすれば限られた車体空間で他の取付部品と干渉
する不具合がある。When such vibrations occur, there is a risk that the oil level in the float chamber of the carburetor will ripple due to the influence of the vibrations, making the function of the carburetor unstable. Further, in this case, if the volume of the reed valve is increased in an attempt to improve its strength, there is a problem that the reed valve will interfere with other attachment parts in the limited space of the vehicle body.
本発明は前記不具合を解消すべく案出されたものであっ
て、本発明の目的とする処は、リードバルブ本体の振動
を防止し、且つ他の取付部品と干渉せずにリードバルブ
を配設できる自動二輪車用エンジンの吸気装置を提供す
るにある。The present invention has been devised to solve the above-mentioned problems, and an object of the present invention is to prevent vibration of the reed valve body and to arrange the reed valve without interfering with other mounting parts. An object of the present invention is to provide an intake device for a motorcycle engine that can be installed.
（問題点を解決するための手段）
前記目的を達成するため本発明は、エンジン（９）の吸
気通路（５９）の開口縁にねじ止めされるリードバルブ
（θ７）のフランジ（７５）の外形を縦長に形成した。(Means for Solving the Problems) In order to achieve the above object, the present invention provides improvements in the outer shape of the flange (75) of the reed valve (θ7) screwed to the opening edge of the intake passage (59) of the engine (9). was formed vertically.
（実施例）
以下本発明の好適一実施例を添付図面に従って説明する
。(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図は自動二輪車の左側面図を、第２図はエンジンの
左側面拡大図を示す。FIG. 1 shows a left side view of the motorcycle, and FIG. 2 shows an enlarged left side view of the engine.
（１）は自動二輪車、（３）は前輪、（５）は後輪で、
自動二輪車（１）の車体フレーム（７）にはエンジン（
９）を搭載し、前輪（３）はハンドル（１１）、フロン
トフォーク（１３）を介して操向自在に懸架支持し、後
輪（５）はりャフォーク（１７）で支持し、車体フレー
ム（７）上にはチャンバーカバー（１９）、シー） （
２１）を設ける。(1) is a motorcycle, (3) is a front wheel, (5) is a rear wheel,
The body frame (7) of the motorcycle (1) has an engine (
9), the front wheel (3) is suspended and supported via the handle (11) and the front fork (13) so that it can be steered freely, the rear wheel (5) is supported by the carrier fork (17), and the front wheel (3) is supported by the suspension fork (17). ) has a chamber cover (19) on top, and a chamber cover (19) on top of
21).
前記エンジン（８）は実施例においてはクランク軸横置
きで゛前後二気筒（２３） 、（２３） 、（２５）
、（２５＞備えたＶ型の２サイクルエンジンで、チェー
ン駆動によりエンジン出力を後輪（５）へ伝達する。In the embodiment, the engine (8) has a horizontal crankshaft and has two cylinders (23), (23), (25) in the front and rear.
, (25>) A V-type two-stroke engine equipped with a chain drive to transmit engine output to the rear wheels (5).
前記前気筒（２３）、（２３） 、後気筒（２５） 、
（２５）は夫々第３図及び第４図に示すように、各々
クランクケース（２７）に取付けられシリンダ（２８）
が形成されたシリンダブロック（３１）、シリンダブロ
ック（３１）に取着されプラグ（３３）を備えるシリン
ダヘッド（３５）等で構成され、前気筒（２３） 、
（２３）は車体の斜め前方へ向けて突設し、後気筒（２
５） 、（２５）は斜め上方へ向けて突設し、各シリン
ダ（２３）には夫々ピストン（３７）を嵌装する。The front cylinder (23), (23), the rear cylinder (25),
(25) are respectively attached to the crankcase (27) and the cylinder (28) as shown in FIG. 3 and FIG.
It consists of a cylinder block (31) formed with a cylinder block (31), a cylinder head (35) attached to the cylinder block (31) and equipped with a plug (33), etc., and includes a front cylinder (23),
(23) protrudes diagonally toward the front of the vehicle body, and the rear cylinder (23)
5) and (25) project obliquely upward, and each cylinder (23) is fitted with a piston (37), respectively.
前記クランクケース（２７）には前記シリンダ（２８）
に対応して夫々クランク室（３９）を画成し、各クラン
ク室（３９）を挿通してクランク軸（４１）を設け、ク
ランクビン（４３）と左右のクランクウェブ（４５）
、（４５）は各クランク室（３３）に収納せしめ、前記
ピストン（３７）とクランクピン（４３）とをコンロッ
ド（４７）で連結し、クランク軸（４１）のジャーナル
部（４Ｂ）は軸受（５１）、軸受部（５３） 、・・・
を介して支持する。The crankcase (27) has the cylinder (28)
Crank chambers (39) are defined correspondingly to the respective crank chambers (39), and a crankshaft (41) is provided by passing through each crank chamber (39), and a crank bin (43) and left and right crank webs (45)
, (45) are housed in each crank chamber (33), the piston (37) and crank pin (43) are connected by a connecting rod (47), and the journal portion (4B) of the crankshaft (41) is fitted with a bearing ( 51), bearing part (53),...
Support through.
前記シリンダブロック（３１）及びクランクケース（２
７）には第５図に示すように、各シリンダ（２９）とク
ランク室（３８）を連通ずるよう掃気通路（５５） 、
（５５）を形成し、前気筒（２３）を構成するシリンダ
ブロック（３１）には第３図に示すようにシリンダ（２
９）に連通し斜め上方へ開口する排気通路（５７）を形
成し、後気筒（２５）を構成するシリンダブロック（３
１）には方へ開口する排気通路（５７）を形成する。The cylinder block (31) and the crankcase (2)
7), as shown in FIG. 5, there is a scavenging passage (55) that communicates each cylinder (29) with the crank chamber (38);
(55), and the cylinder block (31) constituting the front cylinder (23) has cylinders (2
The cylinder block (3) forming the rear cylinder (25) forms an exhaust passage (57) which communicates with the cylinder block (9) and opens diagonally upward.
1) is formed with an exhaust passage (57) that opens toward the direction.
更に前記クランクケース（２７）には吸気通路（５８）
が形成された吸気管（８１）を突設する。Furthermore, the crankcase (27) has an intake passage (58).
An intake pipe (81) is provided in a protruding manner.
前記吸気通路（５９）は第３図乃至第５図に示すように
車体の後方で且つ斜め上方へ向けて延出させ、前端を各
クランク室（３８）における左右のクランクウェブ（４
５）、（４５）間で画成される空間（６３）に臨ませて
開口し、後端を抜気′筒（２５）の後側で斜め後方に向
けて吸気管（８１）のフランジ（８５）に開口させる。The intake passage (59) extends obliquely upward at the rear of the vehicle body as shown in FIGS. 3 to 5, and its front end is connected to the left and right crank webs (4) in each crank chamber (38).
5), opening facing the space (63) defined between (45), and inserting the flange ( 85).
前記フランジ（８５）にはリードバルブ（８７）を沌結
し、リードバルブ（８７）には管体（６８）を介して気
化器（７１）を連結する。更に、この気化器（７１）の
吸気側にはエアクリーナ（７３）を連結し、これら気化
器（７１）やエアクリーナ（７３）はリードバルブ（８
７）や管体（８８）により片持ち支持する。A reed valve (87) is connected to the flange (85), and a carburetor (71) is connected to the reed valve (87) via a pipe (68). Furthermore, an air cleaner (73) is connected to the intake side of this carburetor (71), and these carburetor (71) and air cleaner (73) are connected to a reed valve (8).
7) and the tube body (88).
前記リードバルブ（８７）はクランク室（３８）内の圧
力変化により吸気通路（５θ）の開閉を行い混合気の逆
流を規制するもので、前記リードバルブ（Ｂ７）はフラ
ンジ（７５）と、該フランジ（７５）に一体に成形さ前
記フランジ（７５）は上下各一対の上部ボルト（７９）
、（７９）及び下部ポルト（８１）、（８１）を介し
て吸気通路（５８）の開口縁、即ちフランジ（８５）に
管体（６８）のフランジ（８３）と共に共締め固定する
。The reed valve (87) opens and closes the intake passage (5θ) according to pressure changes in the crank chamber (38) to restrict backflow of the air-fuel mixture, and the reed valve (B7) has a flange (75) and a The flange (75) is integrally molded with a pair of upper and lower bolts (79).
, (79) and the lower ports (81), (81) are fastened together with the flange (83) of the pipe body (68) to the opening edge of the intake passage (58), that is, the flange (85).
前記フランジ（７５）の外形は縦長となるように形成し
、且つ上部ボルト（７９）、（７９）間寸法ｉ（若しく
は下部ボルト（８１）、（８１）間寸法文）よりも、上
部ボルト（７９）と下部ポル）（８１）間の寸法（Ｌ）
が大となるように形成する。The outer shape of the flange (75) is formed to be vertically elongated, and the upper bolt ( Dimension (L) between 79) and lower pole) (81)
Form it so that it becomes large.
前記リードバルブ本体（７７）は矩形状の新気入口部（
８５）を有し側面断面が略三角形状のバルブケース（８
７）を備える。The reed valve main body (77) has a rectangular fresh air inlet section (
A valve case (85) with a substantially triangular side cross section
7).
前記パルプケース（８７）の上、下板には夫々一対のバ
ルブ孔（８９）、（８θ）を形成し、該バルブ孔（８９
） 。A pair of valve holes (89), (8θ) are formed in the upper and lower plates of the pulp case (87), respectively.
).
（８８）を開閉自在とするリード（９１） 、（９１）
をパルプケース（８７）にねじ止めし、実施例では前記
リード（９１）を三枚ずつ並設した。(88) Leads that can be opened and closed (91), (91)
was screwed to the pulp case (87), and in the example, three leads (91) were arranged in parallel.
従って本実施例によれば、リードバルブ本体（７７）は
吸気通路（５８）の開口縁に片持ち支持され振動し易い
傾向にあるものの、フランジ（７５）の外形を縦長に形
成したので、フランジ（７５）を吸気通路（５９）の開
口縁にねじ止めするための上下方向のねじ間寸法（Ｌ）
を大きく確保することができ、従って該フランジ（７５
）を介してリードバルブ本体（７７）を強固に支持でき
、リードバルブ本体（７７）の振動を抑制し、気化器（
７１）の機能を良好に保つことができる。Therefore, according to this embodiment, although the reed valve main body (77) is supported cantilevered by the opening edge of the intake passage (58) and tends to vibrate, the flange (75) is formed to have an elongated outer shape. Dimension between the screws in the vertical direction (L) for screwing (75) to the opening edge of the intake passage (59)
Therefore, the flange (75
) can firmly support the reed valve body (77), suppress vibration of the reed valve body (77), and stabilize the carburetor (
71) can be maintained in good condition.
また、特に自動二輪車では横方向の寸法は制限があり狭
いが、リードバルブ（６７）のフランジ（７５）を縦長
に形成したので、その分フランジ（７５）の横幅寸法を
小さくでき、リードバルブ（６７）の他の取付部品との
干渉を回避しつつリードバルブ（８７）の振動を抑制す
ることができる。In addition, although the lateral dimension is narrow especially in motorcycles, since the flange (75) of the reed valve (67) is formed vertically, the lateral dimension of the flange (75) can be reduced accordingly, and the reed valve ( Vibration of the reed valve (87) can be suppressed while avoiding interference with other attachment parts of the reed valve (87).
（発明の効果） 以上の説明で明らかなように本発明によれば。(Effect of the invention) According to the present invention, as is clear from the above description.
リードバルブ本体の振動を防止でき、且つ他の取付部品
と干渉せずにリードバルブを配設できる。Vibration of the reed valve body can be prevented, and the reed valve can be installed without interfering with other mounting parts.
第１図は自動二輪車の左側面図、第２図はエンジンの左
側面拡大図、第３図は前方気筒に沿ったエンジン断面図
、第４Ｆ１！Ｊは後方気筒に沿ったエンジン断面図、第
５図はシリンダとリードバルブ等の関係を示すエンジン
の展開図、第６図はエンジンのクランク軸部分の断面図
、第７図は第２図の■矢視図である。
尚、（１）は自動二輪車、（３）は前輪、（θ）はエン
ジン、（１５）は後輪、（２１）はシート、（２７）は
クランクケース、（５８）は吸気通路、（Ｂ７）はリー
ドバルブ、（７１）は気化器、（７５）はフランジ、（
７７）はリードバルブ本体である。Figure 1 is a left side view of the motorcycle, Figure 2 is an enlarged left side view of the engine, Figure 3 is a sectional view of the engine along the front cylinder, and Figure 4F1! J is a sectional view of the engine along the rear cylinder, Figure 5 is an exploded view of the engine showing the relationship between the cylinder and reed valve, etc., Figure 6 is a sectional view of the crankshaft of the engine, and Figure 7 is the same as Figure 2. ■It is an arrow view. In addition, (1) is a motorcycle, (3) is a front wheel, (θ) is an engine, (15) is a rear wheel, (21) is a seat, (27) is a crankcase, (58) is an intake passage, (B7 ) is the reed valve, (71) is the carburetor, (75) is the flange, (
77) is the reed valve body.
Claims (1)
ブを介設し、このリードバルブは吸気通路の開口縁にね
じ止めされるフランジと、このフランジに一端側開口部
が連結され他端側が吸気通路内に向って突設され気化器
からの混合気を吸気通路内に向ってのみ流動させる箱状
のリードバルブ本体とを備える自動二輪車用エンジンの
吸気装置において、前記フランジの外形は縦長となるよ
うに形成されていることを特徴とする自動二輪車用エン
ジンの吸気装置。A reed valve is interposed between the engine intake passage opening and the carburetor. In an intake system for a motorcycle engine, the flange has a vertically elongated outer shape, and includes a box-shaped reed valve body that protrudes into the intake passage and causes the air-fuel mixture from the carburetor to flow only into the intake passage. An intake device for a motorcycle engine, characterized in that the intake device is formed to have the following characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61035589A JPS61218716A (en) | 1986-02-20 | 1986-02-20 | Intake device of engine for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61035589A JPS61218716A (en) | 1986-02-20 | 1986-02-20 | Intake device of engine for motorcycle |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16369383A Division JPS6056124A (en) | 1983-09-06 | 1983-09-06 | Two-cycle engine |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15742193A Division JPH06280583A (en) | 1993-06-28 | 1993-06-28 | Intake device of engine for motorcycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61218716A true JPS61218716A (en) | 1986-09-29 |
| JPH0315003B2 JPH0315003B2 (en) | 1991-02-28 |
Family
ID=12445972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61035589A Granted JPS61218716A (en) | 1986-02-20 | 1986-02-20 | Intake device of engine for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61218716A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55146230A (en) * | 1972-08-22 | 1980-11-14 | Performance Industries | Twoocycle internal combustion engine with compression in crankcase |
-
1986
- 1986-02-20 JP JP61035589A patent/JPS61218716A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55146230A (en) * | 1972-08-22 | 1980-11-14 | Performance Industries | Twoocycle internal combustion engine with compression in crankcase |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0315003B2 (en) | 1991-02-28 |
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