JPS58106159A - Carburetor fitted with reed valve - Google Patents
Carburetor fitted with reed valveInfo
- Publication number
- JPS58106159A JPS58106159A JP20363681A JP20363681A JPS58106159A JP S58106159 A JPS58106159 A JP S58106159A JP 20363681 A JP20363681 A JP 20363681A JP 20363681 A JP20363681 A JP 20363681A JP S58106159 A JPS58106159 A JP S58106159A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- throttle valve
- reed valve
- carburetor
- power
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
- F02M9/10—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having valves, or like controls, of elastic-wall type for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers or of the entry passage
- F02M9/106—Pneumatic or hydraulic control
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
Description
【発明の詳細な説明】 固定ベンチュリーを有する気化器においては。[Detailed description of the invention] In a vaporizer with a fixed venturi.
絞弁開度が一定のもとにエンジン回転数が変化したとき
、常に適正な空燃比を与えることは困難である。本発明
は吸気通路にリード弁を使用することによってエンジン
回転数又はブーストの変化に応する適切な空燃比の制御
を可能にした気化器を提供するものである。以下図面に
よってその構造の実施例を説明する。When the engine speed changes while the throttle valve opening is constant, it is difficult to always provide an appropriate air-fuel ratio. The present invention provides a carburetor that makes it possible to appropriately control the air-fuel ratio in response to changes in engine speed or boost by using a reed valve in the intake passage. Examples of the structure will be described below with reference to the drawings.
第１図は固定ペンチエリ−を有する単胴形の気化器にリ
ード弁を使用したときの一実施例であって、符号１は気
化器本体、２は主吸気通路。FIG. 1 shows an embodiment in which a reed valve is used in a single-barrel carburetor having a fixed pentier, in which reference numeral 1 designates the carburetor main body and 2 designates the main intake passage.
３は固定ペンチーリ−９４は一対のリード弁。3 is a fixed pencil valve and 94 is a pair of reed valves.
５は絞弁、６はパワノズル、６−１はパワー燃料通路ｔ
７はスローエア通路、８はスローホード、９はアイドリ
ングスクリュー、１０はスロ−エアブリード・アジャス
トスクリュー、１１ハスロ一フリードエア通路、１２は
スローアウトレット・ジェット、１３はスロー燃料ジェ
ット、１４はメーンノズル、１５はフロートチャンバ、
１６はメーンノズル１４のブリードエアホール、１６−
１はブリードエア通路、１８はパワバルブ、１９は負圧
室２ｏを画成するダイアフラム、２１は通常パワバルブ
１８を閉じる方向にダイアフラムに付勢するスプリング
、２２はパワバルブの負圧通路、２３はパワバルブの負
圧取出口である。矢印は空気の流れ方向を示す。一般に
はスローポート８（パイロットアウトレット）は主吸気
通路に開口するスロー通路に連通し、アイドリンク時に
は絞弁はアイドリング開度にあるが１本発明の第１図に
おいては。5 is a throttle valve, 6 is a power nozzle, 6-1 is a power fuel passage t
7 is slow air passage, 8 is slow hoard, 9 is idling screw, 10 is slow air bleed adjustment screw, 11 is slow free air passage, 12 is slow outlet jet, 13 is slow fuel jet, 14 is main nozzle, 15 is float chamber,
16 is the bleed air hole of the main nozzle 14, 16-
1 is a bleed air passage, 18 is a power valve, 19 is a diaphragm that defines the negative pressure chamber 2o, 21 is a spring that normally biases the diaphragm in the direction of closing the power valve 18, 22 is a negative pressure passage of the power valve, and 23 is a negative pressure passage of the power valve. This is a negative pressure outlet. Arrows indicate the direction of air flow. In general, the slow port 8 (pilot outlet) communicates with a slow passage that opens into the main intake passage, and the throttle valve is at the idling opening during idling, but in FIG. 1 of the present invention.
リード弁及び絞弁は全閉し、アイドル運転用空気供給の
ため、主吸気通路から独立した空気通路からなるスロー
エア通路７を持たせている。The reed valve and throttle valve are fully closed, and a slow air passage 7 consisting of an air passage independent from the main intake passage is provided to supply air for idling operation.
一対のリード弁４はエンジン回転速度又はブースト変化
による吸気流量の変化、即ち吸気流の動圧の変化に応じ
て開口面積が変化し、パワノズル６とスローポート８に
対して可変ペンチーリーの作用をする。実線で示された
リード弁４は実線で示された絞弁５に、又二点鎖線で示
されたリード弁４は同じく二点鎖線で示された絞弁５に
対応する。次に第２図（ａ）から（ｄ）に至る各図によ
って絞弁５全閉時、全開時、全閉から全開に急加速した
ときの作用を説明する。第２図において（ａ）は絞弁５
が全閉のアイドリング連転時の状態を示す。主吸気通路
２はリード弁４によって閉されていて吸気の流れがない
から、空気は専らスローエア通路７（第１図）を介して
燃料と共にスローポート８から供給される。又絞弁５が
全閉となっていて、パワパルプ１８の負圧取出口２３に
は負圧が全く作用しないからパワノズル６からの燃料の
供給は生じない。（ｂ）は全開高速回転時、（Ｃ）は全
開低速回転時のＩＪ−ド弁の開き状態、燃料の流入状態
を示す。高速回転時には図の如り、リード弁の開口゛面
積は大きく最大出力をまかなう空気量が確保され、燃料
は主にメーンノズルから供給される。低速回転時はリー
ド弁の開口面積は小さくなるが、そこを流れる空気の速
度が上り、メーンノズルにかＮる負圧は極端には落ちず
適正混合比が維持される。（ｄ）は絞弁５全閉のアイド
リング状態から急滓に絞弁５を全開とした急加速時の状
態を示す。急速に絞弁５を全開とした直後はリード弁は
全閉状態に保たれているから絞弁５が全開となるとパワ
パルプ１８の負圧取出口２３に負圧が作用してパワバル
ブ１８が開き、ノくワノズル６にも急速に負圧がかかつ
て燃料が供給され。The pair of reed valves 4 have an opening area that changes according to changes in the intake flow rate due to changes in engine speed or boost, that is, changes in the dynamic pressure of the intake flow, and act as a variable pencil reed valve on the power nozzle 6 and the slow port 8. . The reed valve 4 indicated by a solid line corresponds to the throttle valve 5 indicated by a solid line, and the reed valve 4 indicated by a two-dot chain line corresponds to the throttle valve 5 also indicated by a two-dot chain line. Next, the operation when the throttle valve 5 is fully closed, when it is fully open, and when it is suddenly accelerated from fully closed to fully open will be explained with reference to FIGS. 2(a) to 2(d). In Fig. 2, (a) is the throttle valve 5.
shows the state during continuous idling with fully closed. Since the main intake passage 2 is closed by the reed valve 4 and there is no flow of intake air, air is supplied from the slow port 8 together with fuel exclusively through the slow air passage 7 (FIG. 1). Further, since the throttle valve 5 is fully closed and no negative pressure acts on the negative pressure outlet 23 of the power pulp 18, no fuel is supplied from the power nozzle 6. (b) shows the open state of the IJ-door valve and the fuel inflow state at full open high speed rotation, and (C) shows the open state of the IJ-door valve and the fuel inflow state at full open low speed rotation. As shown in the figure, during high-speed rotation, the opening area of the reed valve is large to ensure the amount of air to cover the maximum output, and fuel is mainly supplied from the main nozzle. During low-speed rotation, the opening area of the reed valve becomes smaller, but the speed of the air flowing through it increases, and the negative pressure in the main nozzle does not drop to an extreme level, maintaining an appropriate mixing ratio. (d) shows a state during sudden acceleration from an idling state with the throttle valve 5 fully closed to a sudden acceleration with the throttle valve 5 fully open. Immediately after the throttle valve 5 is rapidly fully opened, the reed valve is kept fully closed, so when the throttle valve 5 is fully opened, negative pressure acts on the negative pressure outlet 23 of the power pulp 18 and the power valve 18 opens. Negative pressure is rapidly built up in Nokuwa nozzle 6 as well, and fuel is supplied.
エンジン回転を急速に高めることができる。なお負圧取
出口２３は絞弁５とリード弁４の間におき、パワノズル
６の位置は絞弁５の下流の位置においてもよい。Engine speed can be increased rapidly. Note that the negative pressure outlet 23 may be placed between the throttle valve 5 and the reed valve 4, and the power nozzle 6 may be located downstream of the throttle valve 5.
以上は単胴形気化器についてリード弁の作用をのべたが
、−次二次の吸気通路を有する複合形気化器についても
、二次側の吸気通路のベンチュリ一部と絞弁との間にリ
ード弁を設けることによって同様の目的を達成すること
が・できるが、単胴形気化器にリード弁を適用した場合
との相異点は、−次側でアイドリンク運転機能をもたせ
ているため、二次側絞弁の下流側にはスローポートを必
要としないことである。The above describes the effect of the reed valve on a single-barrel carburetor, but for a compound carburetor with a secondary intake passage, there is also a gap between the venturi part of the secondary intake passage and the throttle valve. The same purpose can be achieved by installing a reed valve, but the difference from applying a reed valve to a single-barrel carburetor is that it has an idle link operation function on the - next side. , no slow port is required downstream of the secondary throttle valve.
第３図乃至第５図は絞弁として板バルブを使用した複合
形気化器にリード弁を使用した一実施例を示す。第３図
は板バルブを使用した複合形気化器を吸気通路の入口側
から見た図面、第４図は第３図のＩＶ−■断面図、第５
図は二次吸気通路の断面図を示し、矢印は吸気の流れ方
向を示す。図において符号３１は一次吸気通路。3 to 5 show an embodiment in which a reed valve is used in a composite carburetor using a plate valve as a throttle valve. Figure 3 is a view of a composite carburetor using a plate valve as seen from the intake passage inlet side, Figure 4 is a sectional view taken along line IV-■ in Figure 3, and Figure 5
The figure shows a cross-sectional view of the secondary intake passage, with the arrow indicating the flow direction of the intake air. In the figure, reference numeral 31 indicates a primary intake passage.
３２は一次側のメーンノズル、３３は二次吸気通路、３
４は二次側のメーンノズル、３５はリ−）”弁、３６は
パワノズル、３７は板パルフチ。32 is the main nozzle on the primary side, 33 is the secondary intake passage, 3
4 is the main nozzle on the secondary side, 35 is the Lee valve, 36 is the power nozzle, and 37 is the plate pallet.
第４図で云えば紙面に直角方向に、第５図で云えば上下
方向に摺動する。３９は上記板パルプ３７を常に下方に
押下げる方、向に付勢するスプリングで、板パルプ３７
に設けられた孔３８に内蔵されている。板パルプ３７は
図には示してないアクセルペタル又はアクセルグリップ
によって９図に示してないケーブルにより、スプリング
３９の力に抗して引き上げられる。第１図乃至第２図と
同目的の部材は同一の符号を以て示しである。複合形気
化器の場合のり一ド弁の作用は単胴形気化器の場合のス
ローボートの作用が一次側で受持たれている以外は、す
べて単胴形の場合と同様であるから省略する。上記板パ
ルプ３７を使用した複合形気化器は、−次・二次側吸気
通路の絞弁を一体で構成した。従来の如く一次絞弁の一
定開度の開き後機械的に二次絞弁を開かせてもよいこと
は勿論であ”るが。In FIG. 4, it slides in a direction perpendicular to the plane of the paper, and in FIG. 5, it slides in an up-down direction. Reference numeral 39 denotes a spring that always presses the pulp plate 37 downward.
It is built in a hole 38 provided in the. The pulp plate 37 is pulled up against the force of a spring 39 by means of an accelerator pedal or an accelerator grip (not shown) and a cable (not shown in FIG. 9). Components having the same purpose as in FIGS. 1 and 2 are designated by the same reference numerals. The action of the gate valve in the case of a compound type carburetor is the same as in the case of a single-barrel type carburetor, except that the effect of the slow boat in the case of a single-barrel carburetor is taken care of on the primary side, so it will be omitted. . The composite type carburetor using the above-mentioned plate pulp 37 has the throttle valves of the secondary and secondary side intake passages integrated. Of course, the secondary throttle valve may be opened mechanically after the primary throttle valve has been opened to a certain degree as in the conventional method.
図の如く一体構成して簡素化することによって従来の二
次側の絞弁を負圧制御する複合形気化・８′・。As shown in the figure, the composite type vaporizer 8' controls the negative pressure of the conventional throttle valve on the secondary side by simplifying the integral structure.
器と同一の機能をもたせることができる。It can have the same function as a container.
以上率−Ｈ１にか〜るリード弁付気化器の利点を更めて
列挙すれば。The advantages of the reed valve carburetor according to the above ratio -H1 will be further enumerated.
ｆｌ） 絞弁開度一定時のエンジン回転速度の変化に
対して適正な空燃比を与えることができる。fl) It is possible to provide an appropriate air-fuel ratio for changes in engine speed when the throttle valve opening is constant.
（２） 加速性が良く、特にアイドリンク時から絞弁
を全開とする急加速も可能である。(2) Good acceleration performance, especially rapid acceleration with the throttle valve fully open from idling is possible.
（３） アイドリンクの安定性が得られる。(3) Stability of the eye link can be obtained.
（４） 構造が簡単な複合形気化器を構成することが
できる。(4) A composite carburetor with a simple structure can be constructed.
第１図は本発明にか入るリード弁付気化器の単胴形の一
実施例の縦断面図、第２図はその作用説明図、第３図乃
至第５図はリード弁を使用した複合形気化器の一実施例
を示す。
３・・・ベンチュリー ４・・・リード弁 ５・・・絞
弁６・・・パワノズル ７・・・スローエア通路８・
・・スローボート １８・・・パワパルプ３１・・・１
次側吸気通路
３２・・・１次側メーンノズル
３３・・・２次側吸気通路
３４・・・２次側メーンノズル
３５・・・リード弁 ３７・・・板パルプ出願人 三
國工業株式会社Fig. 1 is a longitudinal cross-sectional view of an embodiment of a single-barrel type of a reed valve-equipped carburetor according to the present invention, Fig. 2 is an explanatory diagram of its operation, and Figs. 3 to 5 are a composite structure using a reed valve. 1 shows an example of a shaped vaporizer. 3... Venturi 4... Reed valve 5... Throttle valve 6... Power nozzle 7... Slow air passage 8.
...Slow Boat 18...Power Pulp 31...1
Next side intake passage 32...Primary side main nozzle 33...Secondary side intake passage 34...Secondary side main nozzle 35...Reed valve 37...Plate pulp applicant Mikuni Kogyo Co., Ltd.
Claims (2)
弁５の上流の主吸気通路自吸気流の動圧によって開くリ
ード弁４と、該リード弁４と上記絞弁５との間にパワー
パルプ１８を開閉する負圧取出口２３と、該リード弁４
の上流に配置されるメーンノズル１４と、絞弁全閉時ア
イドリング運転用空気を供給するための独立したスロー
エア通路７とからなるリード弁付気化器。(1) In a fixed Pentier type carburetor, there is a reed valve 4 that opens by the dynamic pressure of the self-intake air flow in the main intake passage upstream of the throttle valve 5, and a power pulp 18 between the reed valve 4 and the throttle valve 5. a negative pressure outlet 23 that opens and closes the reed valve 4;
A reed valve equipped carburetor consisting of a main nozzle 14 disposed upstream of the reed valve and an independent slow air passage 7 for supplying air for idling operation when the throttle valve is fully closed.
気化器において、二次吸気通路にリード弁３り 殊を設けたことを特徴とする第一項記載のり一ド弁付気
化器。(2) - A composite carburetor having a secondary intake passage and a secondary intake passage, wherein the secondary intake passage is provided with a reed valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20363681A JPS58106159A (en) | 1981-12-18 | 1981-12-18 | Carburetor fitted with reed valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20363681A JPS58106159A (en) | 1981-12-18 | 1981-12-18 | Carburetor fitted with reed valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58106159A true JPS58106159A (en) | 1983-06-24 |
| JPS6143542B2 JPS6143542B2 (en) | 1986-09-27 |
Family
ID=16477323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20363681A Granted JPS58106159A (en) | 1981-12-18 | 1981-12-18 | Carburetor fitted with reed valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58106159A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995019496A1 (en) * | 1994-01-13 | 1995-07-20 | Fernando Augusto Baptista | Device for the control of the vacuum |
-
1981
- 1981-12-18 JP JP20363681A patent/JPS58106159A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995019496A1 (en) * | 1994-01-13 | 1995-07-20 | Fernando Augusto Baptista | Device for the control of the vacuum |
| US5674434A (en) * | 1994-01-13 | 1997-10-07 | Baptista; Fernando A. | Device for the control of the vacuum |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6143542B2 (en) | 1986-09-27 |
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