JPH084597A - Carburetor for internal combustion engine - Google Patents

Carburetor for internal combustion engine

Info

Publication number
JPH084597A
JPH084597A JP17308594A JP17308594A JPH084597A JP H084597 A JPH084597 A JP H084597A JP 17308594 A JP17308594 A JP 17308594A JP 17308594 A JP17308594 A JP 17308594A JP H084597 A JPH084597 A JP H084597A
Authority
JP
Japan
Prior art keywords
fuel
forming
engine
bypass
atomization
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
Application number
JP17308594A
Other languages
Japanese (ja)
Inventor
Tadao Akima
忠男 秋摩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP17308594A priority Critical patent/JPH084597A/en
Publication of JPH084597A publication Critical patent/JPH084597A/en
Pending legal-status Critical Current

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  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Abstract

PURPOSE:To promote atomization of fuel throughout the whole area of the operation state of an engine and to provide ideal air-fuel mixture throughout the operation state of an engine by forming a notch in a needle jet, forming a groove in a pilot outlet, and forming a groove in a bypass. CONSTITUTION:By forming a notch 1 in a cylindrical needle jet 4, atomization of fuel is promoted by also utilizing a velocity of flow of intake air flowing along the periphery of the needle jet 4. By forming grooves 2 and 3 in a pilot outlet 5 and a bypass 6, respectively, opened in a plane-form manner to the wall surface of a venturi part 9, fuel is easily guided through the opening parts of the pilot outlet 5 and the bypass 6 along the slopes of the grooves 2 and 3 even at a low negative pressure. This constitution promotes atomization of fuel throughout the whole area of the operation state of an engine, improves combustion efficiency, purifies exhaust gas, improves operability, reduces fuel consumption, and reduces the generation of noise.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、燃料の霧化を促進す
ることによって、省燃費および運転性の向上等を図った
内燃機関の気化器に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carburetor for an internal combustion engine, which promotes atomization of fuel to save fuel consumption and improve drivability.

【0002】[0002]

【従来の技術】気化器は、その本質上アイドリング時や
スロットル急開時などの負圧の低い運転状態において燃
料の霧化が良好ではなく、運転性を確保するため加速ポ
ンプ等複雑な空燃比補正装置を設けたものなどがあっ
た。
2. Description of the Related Art A carburetor does not have a good atomization of fuel when operating under a low negative pressure such as when idling or when the throttle is suddenly opened. Some were equipped with a correction device.

【0003】[0003]

【発明が解決しようとする課題】これには次のような欠
点があった。 (イ)構造が複雑になり故障率と生産コストが高い。 (ロ)加速時などに一時的に混合気が、過濃になりやす
く燃費や排気ガスなどに悪影響があった。 (ハ)アイドリング回転数の設定を高くしなければなら
ず燃費および深夜、早朝時におけるアイドリング時の騒
音の問題などがあった。 本発明は、以上の欠点を解決するためになされたもので
あり、その目的は、機関の運転状態全域にわたる燃料の
霧化の促進にある。それによって、機関の各運転状態に
理想的な混合気を得るものである。
However, this has the following drawbacks. (B) The structure is complicated and the failure rate and production cost are high. (B) The air-fuel mixture is likely to become rich in concentration temporarily at the time of acceleration, which adversely affects fuel economy and exhaust gas. (C) The idling speed must be set high, and there were problems such as fuel consumption and noise during idling at midnight and early morning. The present invention has been made to solve the above drawbacks, and an object thereof is to promote atomization of fuel over the entire operating state of an engine. As a result, an ideal air-fuel mixture is obtained for each operating condition of the engine.

【0004】[0004]

【課題を解決するための手段】[Means for Solving the Problems]

(イ)ニードルジェット(4)に切り欠き(1)を設け
る。 (ロ)パイロットアウトレット(5)に溝(2)を設け
る。 (ハ)バイパス(6)に溝(3)を設ける。 本発明は、以上の構成からなる内燃機関の気化器であ
る。(イ)は機関の中高速域を、(ロ)はアイドリング
から低速域を、(ハ)は低中速域をそれぞれ受け持つ気
化器の部品及び部位である。機関は、その設計思想によ
り高速型、低速型、中速型等種々の特性がある。よっ
て、気化器と組み合わせる機関の特性によっては、
(イ)(ロ)(ハ)はそれぞれ単独でも本発明の目的を
達しうる。なお(イ)の切り欠き(1)は、(4)の加
工位置によっては穴となる。
(A) The notch (1) is provided in the needle jet (4). (B) The groove (2) is provided in the pilot outlet (5). (C) The groove (3) is provided in the bypass (6). The present invention is a carburetor for an internal combustion engine having the above configuration. (A) is a part and part of the carburetor which is in charge of the middle and high speed range of the engine, (B) is in the low speed range from idling, and (C) is in the low and middle speed range. The engine has various characteristics such as a high speed type, a low speed type, and a medium speed type depending on its design concept. Therefore, depending on the characteristics of the engine combined with the carburetor,
Each of (a), (b) and (c) can attain the object of the present invention alone. The notch (1) of (a) becomes a hole depending on the processing position of (4).

【0005】[0005]

【作用】[Action]

(イ)円筒状の、ニードルジェット(4)に切り欠き
(1)を設けることによりニードルジェット(4)の円
周に沿って流れる吸気流速をも利用することによって燃
料の霧化がより促進される。 (ロ)ベンチュリー部(9)の壁面に平面的に開口して
いるパイロットアウトレット(5)とバイパス(6)に
それぞれ溝(2)(3)を設けることによって(5)
(6)の開口部から溝(2)(3)の斜面に沿って低い
負圧でも燃料が導き出されやすくなる。 以上により機関の運転状態全域にわたり燃料の霧化が促
進される。
(A) By providing the cylindrical needle jet (4) with the notch (1), the atomization of fuel is further promoted by utilizing the intake flow velocity flowing along the circumference of the needle jet (4). It (B) By providing the grooves (2) and (3) in the pilot outlet (5) and the bypass (6), which are opened in a plane on the wall surface of the venturi portion (9), respectively (5)
The fuel is easily led out from the opening of (6) along the slopes of the grooves (2) and (3) even at a low negative pressure. As described above, atomization of fuel is promoted over the entire operating state of the engine.

【0006】[0006]

【実施例】【Example】

(イ)ニードルジェット(4)に切り欠き(1)を設け
る。 (ロ)パイロットアウトレット(5)に溝(2)を設け
る。 (ハ)バイパス(6)に溝(3)を設ける。 本発明は、以上の構成よりなっている。従来のものは、
円筒状のニードルジェット(4)の上端の吸気流速のみ
により燃料を噴出していた。円筒状の、ニードルジェッ
ト(4)に切り欠き(1)を設けることによりニードル
ジェット(4)の円周に沿って流れる吸気流速をも利用
することによって燃料の霧化がより促進され、また切り
欠き(1)の形状により混合気もより拡散され、機関の
燃焼効率の向上が図れる。ベンチュリー部(9)の壁面
に平面的に開口していたパイロットアウレット(5)と
バイパス(6)にそれぞれ溝(2)(3)を設けること
によって開口部が立体的になり燃料は溝(2)(3)の
斜面に沿って低い負圧でも導きれ出れやすくなる。以上
により、アイドリング時など負圧の低い状態からの急激
なスロットル操作にも機関はよく追従し運転性の向上が
みられた。またアイドリング回転数も下げることができ
た。以下は実施に関する資料である。 試験場所 構内及び一般公道 試験車両 二輪車 排気量 124CC 気化器の種類 可変ベンチュリー型 試験車両登載の同型気化器に本発明の実施例の(イ)
(ロ)(ハ)の加工を施し試験車両に換装し、油面その
他を再調整して行った。
(A) The notch (1) is provided in the needle jet (4). (B) The groove (2) is provided in the pilot outlet (5). (C) The groove (3) is provided in the bypass (6). The present invention has the above configuration. The conventional one is
The fuel was jetted only by the intake flow velocity at the upper end of the cylindrical needle jet (4). By providing the notch (1) in the cylindrical needle jet (4), the atomization velocity of fuel is further promoted by utilizing the intake flow velocity flowing along the circumference of the needle jet (4), Due to the shape of the notch (1), the air-fuel mixture is further diffused, and the combustion efficiency of the engine can be improved. By providing the grooves (2) and (3) in the pilot outlet (5) and the bypass (6), which are two-dimensionally opened on the wall surface of the venturi part (9), the openings become three-dimensional, and the fuel becomes the groove (2). ) Even if the negative pressure is low along the slope of (3), it will be easy to guide. Based on the above, the engine was able to follow abrupt throttle operation even when the negative pressure was low, such as during idling, and the drivability was improved. Also, the idling speed could be lowered. The following are materials related to implementation. Test place Campus and general public road Test vehicle Two-wheeled vehicle Displacement 124CC Vaporizer type Variable venturi type test vehicle registered same type carburetor of the embodiment of the present invention (a)
(B) and (C) were processed and replaced with a test vehicle, and the oil level and others were readjusted.

【0007】[0007]

【発明の効果】【The invention's effect】

(イ)燃料の霧化の促進による車両の運転状態全域に及
ぶ燃焼効率の向上。 (ロ)(イ)による排気ガスの清浄化。 (ハ)(イ)により極低速からのスロットル追従度の向
上による運転性の向上。特に二輪車においては、渋滞時
の発進時や加速時のエンストによる転倒防止。 (ニ)(イ)によりアイドリング回転数を下げられるこ
とによる燃費の低減。 (ホ)(ニ)によりアイドリング時の騒音の低下。 (ヘ)空燃比補正装置の内、加速ポンプ等を用いず同等
の効果が得られる。 (ト)加速ポンプ等を用いたものにあっては、燃料の絶
対噴出量を低減できる。 (チ)本発明を実施するには既存の気化器の数部品の制
作工程増ですみ生産性が高い。 以上により、省資源、騒音の低減および交通安全度への
向上に貢献する。
(B) Improving combustion efficiency over the entire operating condition of the vehicle by promoting atomization of fuel. (B) Purification of exhaust gas by (a). (C) By (a), the drivability is improved by improving the throttle followability from extremely low speeds. Especially for motorcycles, it prevents falls due to engine stall during start-up or acceleration during traffic jams. (D) Due to (a), the idling speed can be reduced to reduce fuel consumption. (E) (d) reduces noise during idling. (F) The same effect can be obtained without using an acceleration pump or the like in the air-fuel ratio correction device. (G) In the case of using an acceleration pump or the like, the absolute injection amount of fuel can be reduced. (H) In order to carry out the present invention, the number of production steps for existing vaporizers is increased and the productivity is high. Through the above, we will contribute to resource saving, noise reduction, and improvement in traffic safety.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による気化器の要部断面図である。FIG. 1 is a sectional view of a main part of a vaporizer according to the present invention.

【符号の説明】[Explanation of symbols]

1 切り欠き 2 溝 3 溝 4 ニードルジェット 5 パイロットアウトレット 6 バイパス 7 ピストンバルブ(スロットルバルブ) 8 ジェットニードル 9 ベンチュリー部 1 Notch 2 Groove 3 Groove 4 Needle Jet 5 Pilot Outlet 6 Bypass 7 Piston Valve (Throttle Valve) 8 Jet Needle 9 Venturi Part

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】(イ)ニードルジェット(4)に切り欠き
(1)を設ける。 (ロ)パイロットアウトレット(5)に溝(2)を設け
る。 (ハ)バイパス(6)に溝(3)を設ける。 以上の構成からなる内燃機関の気化器。
1. A cutout (1) is provided in a needle jet (4). (B) The groove (2) is provided in the pilot outlet (5). (C) The groove (3) is provided in the bypass (6). A carburetor for an internal combustion engine having the above structure.
JP17308594A 1994-06-21 1994-06-21 Carburetor for internal combustion engine Pending JPH084597A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17308594A JPH084597A (en) 1994-06-21 1994-06-21 Carburetor for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17308594A JPH084597A (en) 1994-06-21 1994-06-21 Carburetor for internal combustion engine

Publications (1)

Publication Number Publication Date
JPH084597A true JPH084597A (en) 1996-01-09

Family

ID=15953931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17308594A Pending JPH084597A (en) 1994-06-21 1994-06-21 Carburetor for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH084597A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104400309A (en) * 2014-09-19 2015-03-11 庄景阳 Method for using operation tool for power lifting of engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104400309A (en) * 2014-09-19 2015-03-11 庄景阳 Method for using operation tool for power lifting of engine

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