JPH09158783A - Air-fuel ratio adjusting device of carburetor - Google Patents

Air-fuel ratio adjusting device of carburetor

Info

Publication number
JPH09158783A
JPH09158783A JP34652995A JP34652995A JPH09158783A JP H09158783 A JPH09158783 A JP H09158783A JP 34652995 A JP34652995 A JP 34652995A JP 34652995 A JP34652995 A JP 34652995A JP H09158783 A JPH09158783 A JP H09158783A
Authority
JP
Japan
Prior art keywords
air
valve
fuel
carburetor
screw
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.)
Withdrawn
Application number
JP34652995A
Other languages
Japanese (ja)
Inventor
Noboru Yanaka
襄 谷中
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.)
SHINAGAWA DIECAST KOGYO KK
Original Assignee
SHINAGAWA DIECAST KOGYO KK
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 SHINAGAWA DIECAST KOGYO KK filed Critical SHINAGAWA DIECAST KOGYO KK
Priority to JP34652995A priority Critical patent/JPH09158783A/en
Publication of JPH09158783A publication Critical patent/JPH09158783A/en
Withdrawn legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To appropriately adjust the air-fuel ratio by simplifying the assembly of a regulating valve using a holding plate made of elastic material for a stopper, and preventing the vibration and leakage of air and fuel. SOLUTION: A seal member 24 made of elastic material is fitted to a shaft part 16 at the tip of a screw rod 13 which is threaded and pierced into a holding plate lapped on an outer surface 2 of a carburetor body 1, and press-fitted to, valve chambers 5, 8. The seal member 24 fixes a regulating valve 12 to prevent the carburetor body 1 from being vibrated, and eliminates leakage of air and fuel from the clearance of a screw fitting part, and closely fixes the holding plate 21 to the outer surface 2.

Description

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

【0001】[0001]

【発明の属する技術分野】本発明は気化器においてエン
ジンに供給する混合気の空燃比を調整するため燃料また
は空気の流量を制御する手動の調整弁を具えた空燃比調
整装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-fuel ratio adjusting device having a manual adjusting valve for controlling the flow rate of fuel or air for adjusting the air-fuel ratio of an air-fuel mixture supplied to an engine in a carburetor.

【0002】[0002]

【従来の技術】エンジンに供給する混合気を気化器で調
整する場合、自動車用エンジンの気化器においては、ア
イドル燃料流量を制御するほかに一部でブリード空気の
ような補正空気流量を制御することによって空燃比を調
整している。また、汎用エンジンの気化器においては、
各部の位置や寸法の僅かな狂いまたは部品の品質差によ
る燃料流量の変動割合が大きいことから、主燃料および
低速燃料の両方の流量を制御することによって空燃比を
調整している。
2. Description of the Related Art When the air-fuel mixture supplied to an engine is adjusted by a carburetor, in a carburetor for an automobile engine, a correction air flow rate such as bleed air is partially controlled in addition to controlling an idle fuel flow rate. The air-fuel ratio is adjusted accordingly. Also, in the vaporizer of a general-purpose engine,
Since the fluctuation rate of the fuel flow rate is large due to the slight deviation of the position and size of each part or the quality difference of parts, the air-fuel ratio is adjusted by controlling the flow rates of both the main fuel and the low speed fuel.

【0003】これらの調整にあたって、気化器本体の燃
料通路または空気通路に設けた弁室を貫通してこれらに
差し込まれ通路有効面積を無段階に変化させる針状の弁
体と、弁室に連通したねじ孔にねじ込まれて弁体を回し
ながら前後動させるねじ杆と、気化器本体外部に突出し
てねじ杆を回すための頭部とを具えた調整弁が用いられ
ている。
In making these adjustments, a needle-shaped valve element which penetrates a valve chamber provided in the fuel passage or air passage of the carburetor main body and is inserted into them to change the passage effective area steplessly is communicated with the valve chamber. There is used a regulating valve having a screw rod screwed into the screw hole to move back and forth while rotating the valve body, and a head for projecting to the outside of the carburetor main body and rotating the screw rod.

【0004】このような調整弁を調整後の所定位置に固
定する回り止め手段として慣用されている圧縮コイルば
ねを気化器本体と頭部との間に嵌入したものは、ばねと
頭部との接触摩擦によって回転しないようにしている。
A compression coil spring, which is commonly used as a rotation stopping means for fixing such a regulating valve at a predetermined position after adjustment, is fitted between the carburetor main body and the head. It is prevented from rotating due to contact friction.

【0005】一方、ねじ孔の雌ねじとねじ杆の雄ねじと
の間には寸法公差による隙間が存在しており、エンジン
や車両、機械などの運転に伴って発生する振動によって
調整弁が動いて燃料や空気の正確且つ安定した計量を妨
げる原因となる。
On the other hand, there is a gap due to dimensional tolerance between the female screw of the screw hole and the male screw of the screw rod, and the vibration is generated due to the operation of the engine, vehicle, machine, etc., and the adjustment valve moves to cause fuel consumption. It may interfere with accurate and stable measurement of air.

【0006】従って、調整弁を動かないように安定よく
設定位置に固定させるためには、かなり長いばねを用い
強い力で頭部に圧接させる必要がある。このため、調整
弁の突出部分が長くなって振動により発生する回転モー
メントが大きく、調整弁が回転して空燃比を狂わせる原
因となる。また、ハウジングに納めて汎用エンジンに組
付ける場合、突出部分が長いためハウジングを大形化し
なければならない。
Therefore, in order to stably fix the adjusting valve at the set position so as not to move, it is necessary to use a considerably long spring and press it against the head with a strong force. For this reason, the protruding portion of the adjusting valve becomes long and the rotational moment generated by the vibration is large, which causes the adjusting valve to rotate and deviate the air-fuel ratio. In addition, when it is housed in a housing and assembled in a general-purpose engine, the housing must be made large because the protruding portion is long.

【0007】その対応策として、弾性材料である合成樹
脂で作られた押え板にねじ杆よりも小径の孔を設け、ね
じ杆をこの孔にねじ切りさせながら挿通して気化器本体
のねじ孔にねじ込み、押え板を圧縮コイルばねに代わる
回り止め手段とすることが特公平1−28220号公報
に提案されている。
As a countermeasure against this, a hole having a diameter smaller than the screw rod is provided in a holding plate made of a synthetic resin which is an elastic material, and the screw rod is threaded into this hole and inserted into the screw hole of the carburetor body. Japanese Patent Publication No. 1-28220 proposes that the screwing and holding plate be a rotation stopping means instead of the compression coil spring.

【0008】[0008]

【発明が解決しようとする課題】前記公報に記載されて
いる技術は、気化器本体にねじ孔を横切って薄い四角形
の凹部を設け、そこへ四角形の押え板を嵌込んだもので
あり、押え板は前後の両表面および外側周面が凹部の向
かい合った内表面および三方の内側周面に接することに
よって前後動および回転動がともに不能の状態でねじ杆
を挿通させる。
The technique described in the above publication is one in which a thin rectangular recess is provided in the carburetor main body across the screw hole, and a rectangular press plate is fitted therein. The front and rear surfaces of the plate and the outer peripheral surface are in contact with the inner surfaces of the recess facing each other and the inner peripheral surfaces of the three sides, so that the screw rod is inserted while the front and rear movement and the rotational movement are both disabled.

【0009】従って、気化器本体に押え板を嵌込むため
の凹部をねじ杆に対して直角に設けることが必要であっ
て気化器の製造にそれだけ余計な手段を要するばかり
か、押え板をその孔がねじ孔と同心になるように凹部に
嵌込まなければならないのできわめて面倒である。更
に、ねじ孔とねじ杆との隙間を通って空気または燃料が
漏れるのを避けられず、殊に寸法の僅かな狂いが燃料流
量を大きく変動させやすい汎用エンジン向け気化器にお
いては、ねじの加工精度を充分高くして漏れを少なくす
ることが要求されるが、小径のねじ孔および小形の調整
ねじに高精度のねじ加工を施すことはきわめて厄介であ
る。
Therefore, it is necessary to provide a recess for inserting the holding plate into the carburetor main body at a right angle to the screw rod, and not only the extra means for manufacturing the carburetor is required, but also the holding plate is attached to the carburetor. This is very cumbersome because the hole must fit into the recess so that it is concentric with the screw hole. Further, air or fuel is unavoidably leaked through the gap between the screw hole and the threaded rod, and especially in a carburetor for a general-purpose engine in which a slight deviation in size easily causes a large fluctuation in the fuel flow rate. Although it is required that the accuracy is sufficiently high to reduce leakage, it is extremely troublesome to perform high-precision screw machining on a small-diameter screw hole and a small adjusting screw.

【0010】本発明は弾性材料製の押え板を調整弁の回
り止め手段に用いた前記のものがもっている製造および
組付けが面倒であるという点、および調整弁のねじ嵌合
部分からの空気または燃料の漏れを避けられないという
点を解決し、構造が簡単で押え板の組付けが容易である
ことに加えて、空気または燃料の漏れがなく、更に振動
に対しても安定した状態で調整弁が設置されているもの
とすることを課題として発明されたものである。
According to the present invention, the holding plate made of an elastic material is used as the rotation stopping means of the adjusting valve, which is troublesome to manufacture and assemble, and the air from the screw fitting portion of the adjusting valve. In addition to solving the problem that fuel leakage is unavoidable, the structure is simple and the press plate is easy to assemble, and there is no air or fuel leakage, and it is stable against vibration. The invention was invented with the object of providing a regulating valve.

【0011】[0011]

【課題を解決するための手段】即ち、そのために本発明
は押え板を気化器本体の外表面に重ねて配置するととも
に、調整弁のねじ杆と弁体との間の軸部に弾性材料で作
られたシール部材を嵌装しこれを弁室に圧入させた。
To this end, according to the present invention, a pressing plate is arranged on the outer surface of the carburetor main body in an overlapping manner, and an elastic material is used for the shaft portion between the screw rod and the valve body of the adjusting valve. The produced seal member was fitted and pressed into the valve chamber.

【0012】従って、押え板を設置するための特別の加
工を気化器本体に施す必要がなくなり、またシール部材
は弁室とねじ嵌合部分とを遮断してねじ加工精度がよく
なくても空気または燃料の漏れを防止し、また振動を吸
収して調整弁が動くのを防止するものであり、前記の課
題が解決されることとなる。
Therefore, it is not necessary to perform special processing for installing the pressing plate on the carburetor main body, and the sealing member blocks the valve chamber and the screw fitting portion, so that the air processing is performed even if the screw processing accuracy is not good. Alternatively, it prevents the leakage of the fuel and prevents the adjusting valve from moving by absorbing the vibration, and the above-mentioned problems are solved.

【0013】[0013]

【発明の実施の形態】本発明を汎用エンジン向け気化器
であって、主燃料用および低速燃料用の二つの調整弁を
具えたものに実施した形態を図面に基いて説明すると、
図1および図2において図示しないダイヤフラム式また
は浮子式の定燃料室から同じく図示しない吸気路に開口
した主ノズルおよびアイドルポート,スローポートに至
る主燃料通路4および低速燃料通路7のそれぞれの有効
面積を各別に調整する二つの手動の調整弁12,12が
互いに接近して配置されている。
BEST MODE FOR CARRYING OUT THE INVENTION A carburetor for a general-purpose engine, which is equipped with two adjusting valves for a main fuel and a low speed fuel, according to an embodiment of the present invention will be described with reference to the drawings.
The effective area of each of the main fuel passage 4 and the low-speed fuel passage 7 extending from the diaphragm-type or float-type constant fuel chamber (not shown in FIGS. 1 and 2) to the intake port (not shown) and the idle port and the slow port Two manual adjusting valves 12, 12 for adjusting each of the two are arranged close to each other.

【0014】二つの燃料通路4,7は弁室5,8および
ジェット6,9を有しており、気化器本体1の一つの外
表面2から弁室5,8のそれぞれに連通する二つのねじ
孔10,10が互いに平行に設けられている。弁室5,
8はねじ孔10よりも小径であり、且つこれらとジェッ
ト6,9とはそれぞれ同一中心軸線上に配置されてい
る。
The two fuel passages 4, 7 have valve chambers 5, 8 and jets 6, 9 and two fuel passages communicating from one outer surface 2 of the carburetor body 1 to each of the valve chambers 5, 8. The screw holes 10 and 10 are provided in parallel with each other. Valve chamber 5,
8 has a smaller diameter than the screw hole 10, and these and the jets 6 and 9 are arranged on the same central axis.

【0015】二つの調整弁12,12は同一寸法に作ら
れており、ねじ孔10にねじ込まれるねじ杆13と、そ
の基端の工具係合溝14を設けた頭部15と、ねじ杆1
3よりも小径であってその先端から前方へ延びる軸部1
6と、軸部16の先端に突出形成された針状の弁体17
とからなる構成であって、従来のものと同じである。
The two adjusting valves 12, 12 are made to have the same size, and a screw rod 13 screwed into the screw hole 10, a head 15 provided with a tool engaging groove 14 at the base end thereof, and a screw rod 1 are provided.
Shaft 1 having a diameter smaller than 3 and extending forward from its tip
6 and a needle-shaped valve body 17 formed to project at the tip of the shaft portion 16.
And is the same as the conventional one.

【0016】回り止めとして働く押え板21は合成樹脂
で作られ、一枚で二つの調整弁12に共用させるように
なっており、二つのねじ孔10,10と同一の間隔で形
成した二つの孔22,22を有している。これらの孔2
2はねじ杆13の雄ねじの山径よりも小径であるが谷径
よりも大径とされている。
The holding plate 21 which functions as a rotation stopper is made of a synthetic resin, and is made to be shared by the two adjusting valves 12 by one piece. Two holding holes 21 formed at the same intervals as the two screw holes 10, 10 are formed. It has holes 22 and 22. These holes 2
The diameter 2 is smaller than the peak diameter of the male screw of the screw rod 13 but larger than the root diameter.

【0017】また、空気や燃料の漏れ止めとして働くシ
ール部材24は合成樹脂で短円筒状に作られており、そ
の内径は軸部16の径と等しいかまたはこれよりも僅か
に大きく、外径は弁室5,8の内径よりも少し大きくさ
れている。
The seal member 24, which acts as a leak preventer for air and fuel, is made of synthetic resin in the shape of a short cylinder, and its inner diameter is equal to or slightly larger than the diameter of the shaft portion 16 and its outer diameter. Is slightly larger than the inner diameters of the valve chambers 5 and 8.

【0018】このような構成の本形態においては、先ず
シール部材24を軸部16に嵌装し、次に孔22をねじ
孔10と目視によりほぼ同心に位置させて押え板21を
外表面2に重ねて調整弁12を先端の弁体17から孔2
2,ねじ孔10へと差込む。そして、ねじ杆13の先端
が孔22の入口に接したとき頭部15をねじ込み方向へ
回すことによってねじ杆13が孔22をねじ切りしなが
ら挿通され、続いてねじ孔10にねじ込まれるようにな
る。弁体17がねじ孔10から弁室5,8に進入してジ
ェット6,9に接近したとき、シール部材24が弁室
5,8に到達して圧入されはじめ、弁体17がジェット
6,9に所定長さ差込まれて通路有効面積を所定空燃比
が得られる値に設定したとき、シール部材24はかなり
の長さが弁室5,8に圧入されて軸部16および弁室
5,8の周面に密着するものである。従って、調整を終
わったとき調整弁12はねじ嵌合部分の隙間による戻り
を生じることなくその位置に固定され、押え板21は外
表面2に密着している。
In the present embodiment having such a structure, first, the seal member 24 is fitted on the shaft portion 16, and then the hole 22 is positioned substantially concentrically with the screw hole 10 so that the holding plate 21 is placed on the outer surface 2. The adjustment valve 12 from the valve body 17 at the tip to the hole 2
2. Insert into the screw hole 10. Then, when the tip of the screw rod 13 comes into contact with the entrance of the hole 22, the head rod 15 is turned in the screwing direction so that the screw rod 13 is threaded through the hole 22 and then inserted into the screw hole 10. . When the valve body 17 enters the valve chambers 5, 8 through the screw holes 10 and approaches the jets 6, 9, the seal member 24 reaches the valve chambers 5, 8 and begins to be pressed in, and the valve body 17 is pushed by the jets 6, 6. When the passage effective area is set to a value such that a predetermined air-fuel ratio can be obtained by inserting the seal member 24 into the valve chambers 5 and 8 for a predetermined length, the shaft member 16 and the valve chamber 5 are inserted. , 8 is closely attached to the peripheral surface. Therefore, when the adjustment is finished, the adjusting valve 12 is fixed in that position without returning due to the clearance of the screw fitting portion, and the holding plate 21 is in close contact with the outer surface 2.

【0019】二つの調整弁12,12は主燃料通路4お
よび低速燃料通路7に対して任意の順序で組付けること
ができ、且つ図1に示す組付け状態で平板からなる押え
板21を外表面2に固定する。
The two adjusting valves 12, 12 can be assembled to the main fuel passage 4 and the low-speed fuel passage 7 in any order, and the holding plate 21 made of a flat plate is removed in the assembled state shown in FIG. Fix on surface 2.

【0020】一方、弁室5,8に圧入されているシール
部材24は押え板21と協働して調整弁12を先端近く
と基端近くの二個所で支持し、エンジンや車両、機械な
どの運転に伴って発生する振動を吸収して調整弁12が
気化器本体1に対して動くのを防止する。このため、ね
じ孔10の雌ねじとねじ杆13の雄ねじとの加工精度が
低く寸法公差が大きくても、振動による調整弁12の動
きがなくなって通路有効面積を所定の一定値に維持し、
燃料の計量を正確に且つ安定よく行わせるものである。
また、シール部材24は弁室5,8とねじ孔10とを完
全に遮断しているので、ねじ孔10とねじ杆13との隙
間を通って空気が侵入し或いは燃料が流出して空燃比を
狂わせる、という現象が解消されるものである。
On the other hand, the seal member 24 press-fitted into the valve chambers 5 and 8 cooperates with the presser plate 21 to support the adjusting valve 12 at two places near the tip and near the base end, such as an engine, a vehicle and a machine. The vibration generated by the operation of is adjusted to prevent the adjusting valve 12 from moving with respect to the carburetor main body 1. Therefore, even if the machining accuracy of the female screw of the screw hole 10 and the male screw of the screw rod 13 is low and the dimensional tolerance is large, the movement of the regulating valve 12 due to vibration is eliminated and the effective passage area is maintained at a predetermined constant value.
The fuel is accurately and stably measured.
Further, since the seal member 24 completely shuts off the valve chambers 5 and 8 from the screw hole 10, air invades or fuel flows out through the gap between the screw hole 10 and the screw rod 13 to cause an air-fuel ratio. The phenomenon of madness is eliminated.

【0021】尚、図のように二つの調整弁12,12を
互いに接近させて配置し一つの押え板21を共用させた
場合、回り止め手段としてばねを用いたものに見られる
ばねが互いに接触干渉して回り止め機能を損なわせるこ
とがある、という心配がなくなる。また、一つの調整弁
12に対して一つの押え板21を用いる場合は、例えば
ねじ孔10が開口している外表面2と交叉する外表面3
に重なる部分をもったL形の押え板とすることにより、
気化器本体1に何の加工も施すことなく回り止めとして
の機能をもたせることができる。
As shown in the drawing, when the two adjusting valves 12 and 12 are arranged close to each other and one pressing plate 21 is shared, the springs which are seen in the case where the spring is used as the rotation preventing means are in contact with each other. There is no need to worry that interference may impair the detent function. When one pressing plate 21 is used for one adjusting valve 12, for example, the outer surface 3 that intersects the outer surface 2 where the screw hole 10 is opened.
By using an L-shaped holding plate that has a portion that overlaps with
The carburetor main body 1 can be provided with a function as a detent without performing any processing.

【0022】尚また、シール部材24は合成樹脂の短円
筒体としたが、合成ゴムのOリングや成型パッキンの複
数個を軸部16に嵌装して構成してもよい。
Although the seal member 24 is a short cylinder made of synthetic resin, a plurality of synthetic rubber O-rings or molded packings may be fitted on the shaft portion 16.

【0023】[0023]

【発明の効果】以上のように、弾性材料で作った押え板
を回り止め手段に用いた調整弁の先端部を弾性材料で作
ったシール部材を弁室に圧入することによって支持させ
た本発明によると、調整弁を調整位置に戻りや振動を生
じることなく安定よく固定させて燃料や空気の通路有効
面積を所定の一定値に維持し、且つ押え板を気化器本体
の外表面に密着させて重ねるという簡単な手段で回り止
めとしての機能を充分に発揮させることができるととも
に、ねじ孔とねじ杆のねじ加工精度が低くても空気や燃
料の漏れが防止される。このため、燃料または空気の計
量を正確且つ安定よく行い所定の空燃比を得ることがで
きるものである。
As described above, according to the present invention, the tip end of the adjusting valve using the pressing plate made of the elastic material as the detent means is supported by pressing the sealing member made of the elastic material into the valve chamber. According to the above, the adjusting valve is stably fixed without returning to the adjusting position and causing vibration to maintain the effective area of the passage of fuel and air at a predetermined constant value, and the pressing plate is brought into close contact with the outer surface of the carburetor body. The function as a rotation stopper can be sufficiently exerted by a simple means of stacking them together, and the leakage of air and fuel can be prevented even if the threading accuracy of the screw hole and the screw rod is low. Therefore, it is possible to accurately and stably measure fuel or air and obtain a predetermined air-fuel ratio.

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

【図1】本発明の実施の形態を示す縦断面図。FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

【図2】図1の分解縦断面図。FIG. 2 is an exploded vertical sectional view of FIG.

【符号の説明】[Explanation of symbols]

1気化器本体,2外表面,4,7燃料通路,5,8弁
室,10ねじ孔,12調整弁,13ねじ杆,16軸部,
17弁体,21押え板,22孔,23シール部材,
1 vaporizer body, 2 outer surface, 4, 7 fuel passage, 5, 8 valve chamber, 10 screw hole, 12 adjusting valve, 13 screw rod, 16 shaft part,
17 valve bodies, 21 pressing plates, 22 holes, 23 sealing members,

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成8年5月20日[Submission date] May 20, 1996

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】特許請求の範囲[Correction target item name] Claims

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【特許請求の範囲】[Claims]

【手続補正2】[Procedure amendment 2]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0011[Correction target item name] 0011

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0011】[0011]

【課題を解決するための手段】即ち、そのために本発明
調整弁のねじ杆と弁体との間の軸部に弾性材料で作ら
れたシール部材を嵌装しこれを弁室に圧入させた。
た、これに加えて弾性材料で作られた押え板を気化器本
体の外表面に重ねて配置しねじ杆をねじ切りして挿通さ
せた。
[Means for Solving the Problems] That is, the present invention
Used a sealing member made of an elastic material on the shaft portion between the threaded rod and the valve body of the adjusting valve and press-fitting it into the valve chamber. Ma
In addition to this, a pressure plate made of elastic material is used as a vaporizer book.
It is placed on the outer surface of the body, and the threaded rod is threaded and inserted.
I let you.

【手続補正3】[Procedure 3]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0012[Correction target item name] 0012

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0012】シール部材は弁室とねじ嵌合部分とを遮断
してねじ加工精度がよくなくても空気や燃料の漏れを防
止するとともに 振動を吸収して調整弁が動くのを防止
し、しかも組付けが簡単である。加えて、押え板を用い
たときは振動の吸収が更に有効となり、且つその設置の
ための特別の加工を気化器本体に施す必要もない。
The seal member blocks the valve chamber and the screw fitting portion.
Prevents leakage of air and fuel even if the screw machining accuracy is not good.
Stops and absorbs vibration to prevent the adjustment valve from moving
Moreover, it is easy to assemble. In addition, using a holding plate
Vibration is more effective, and the installation of
There is no need to perform special processing for the vaporizer body.

【手続補正4】[Procedure amendment 4]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0020[Correction target item name] 0020

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0020】一方、弁室5,8に圧入されているシール
部材24エンジンや車両、機械などの運転に伴って発
生する振動を吸収して調整弁12が気化器本体1に対し
て動くのを防止する。このため、ねじ孔10の雌ねじと
ねじ杆13の雄ねじとの加工精度が低く寸法公差が大き
くても、振動による調整弁12の動きがなくなって通路
有効面積を所定の一定値に維持し、燃料の計量を正確に
且つ安定よく行わせるものである。また、シール部材2
4は弁室5,8とねじ孔10とを完全に遮断しているの
で、ねじ孔10とねじ杆13との隙間を通って空気が侵
入し或いは燃料が流出して空燃比を狂わせる、という現
象が解決されるものである。押え板21はシール剖材2
4と協働して調整弁12を先端近くと基端近くの二個所
で支持し、振動を更に有効に吸収して調整弁12の安定
性を向上する。更に、調整弁12に外力による衝撃が加
えられてもシール部材24および押え板21の弾性力で
調整位置に復元し、弁体17の位置が変動して空燃比を
狂わせるということがない。
[0020] On the other hand, the sealing member 24 is an engine or vehicle which is pressed into the valve chamber 5 and 8, absorbent to adjust valve 12 the vibration generated with the operation of such machinery to move relative to the carburetor body 1 Prevent. Therefore, even if the machining accuracy of the female screw of the screw hole 10 and the male screw of the screw rod 13 is low and the dimensional tolerance is large, the movement of the adjusting valve 12 due to vibration is stopped and the effective passage area is maintained at a predetermined constant value. This allows accurate and stable weighing. Also, the sealing member 2
Since 4 completely shuts off the valve chambers 5 and 8 and the screw hole 10, air invades or fuel flows out through the gap between the screw hole 10 and the screw rod 13 to disturb the air-fuel ratio. The phenomenon is solved. Presser plate 21 is a sealer material 2
The adjusting valve 12 in two places near the distal end and the proximal end in cooperation with
Supported by, absorbs vibration more effectively and stabilizes the regulating valve 12.
Improve sex. In addition, the adjustment valve 12 receives an impact due to an external force.
Even if it is obtained, the elastic force of the seal member 24 and the pressing plate 21
Restored to the adjusted position, the position of the valve element 17 fluctuates and the air-fuel ratio
There is nothing to go mad.

【手続補正5】[Procedure Amendment 5]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0023[Correction target item name] 0023

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0023】[0023]

【発明の効果】以上のように、弾性材料で作ったシール
部材を弁室に圧入することによって調整弁の先端部を
持させた本発明によると、調整弁を調整位置に戻りや振
動を生じることなく安定よく固定させて燃料や空気の通
路有効面積を所定の一定値に維持させることができると
ともに、ねじ孔とねじ杆のねじ加工精度が低くても空気
や燃料の漏れが防止される。このため、燃料または空気
の計量を正確且つ安定よく行い所定の空燃比を得ること
ができるものである。また、押え板は気化器本体の外表
面に密着させて重ねるという簡単な手段で回り止めとし
ての機能を充分に発揮させることができ、且つシール部
材と協働して調整弁を更に安定よく固定するものであ
る。
As described above, according to the present invention in which the tip end portion of the regulating valve is supported by press-fitting the sealing member made of the elastic material into the valve chamber, the regulating valve is brought to the adjusting position. It can be stably fixed without returning or vibrating to maintain the effective area of fuel or air passage at a predetermined constant value, and even if the threading accuracy of the screw hole and the rod is low, air or fuel leaks. Is prevented. Therefore, it is possible to accurately and stably measure fuel or air and obtain a predetermined air-fuel ratio. In addition, the presser plate is on the outside of the carburetor body.
As a rotation stopper, the simple means of making them adhere to the surface and stacking them
All the functions can be fully exerted, and the seal part
It cooperates with the material to more stably fix the adjusting valve.
You.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ねじ杆およびその先端に軸部を経て形成
された針状の弁体からなる調整弁と、前記ねじ杆よりも
小径の孔を有し弾性材料で作られた押え板と、前記軸部
に嵌装される弾性材料で作られたシール部材とを具え;
前記調整弁のねじ杆は前記押え板の孔をねじ切りして挿
通し気化器本体のねじ孔にねじ込まれているとともに、
前記弁体は前記ねじ孔の先端に連通させて燃料または空
気の通路に設けた弁室を貫通して前記通路に差込まれて
おり、前記押え板は前記気化器本体の外表面に重ねら
れ、且つ前記シール部材は前記軸部に嵌装して前記弁室
に圧入されている;ことを特徴とする気化器の空燃比調
整装置。
1. A regulating valve comprising a threaded rod and a needle-shaped valve body formed through a shaft portion at its tip, and a holding plate made of an elastic material having a hole having a diameter smaller than that of the threaded rod, A sealing member made of an elastic material fitted to the shaft portion;
The screw rod of the adjusting valve is threaded through the hole of the holding plate and inserted through the screw hole of the carburetor body, and
The valve body communicates with the tip of the screw hole and is inserted into the passage through a valve chamber provided in a fuel or air passage, and the holding plate is superposed on the outer surface of the carburetor body. The air-fuel ratio adjusting device for a carburetor, wherein the seal member is fitted into the shaft portion and press-fitted into the valve chamber.
JP34652995A 1995-12-12 1995-12-12 Air-fuel ratio adjusting device of carburetor Withdrawn JPH09158783A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34652995A JPH09158783A (en) 1995-12-12 1995-12-12 Air-fuel ratio adjusting device of carburetor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34652995A JPH09158783A (en) 1995-12-12 1995-12-12 Air-fuel ratio adjusting device of carburetor

Publications (1)

Publication Number Publication Date
JPH09158783A true JPH09158783A (en) 1997-06-17

Family

ID=18384047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34652995A Withdrawn JPH09158783A (en) 1995-12-12 1995-12-12 Air-fuel ratio adjusting device of carburetor

Country Status (1)

Country Link
JP (1) JPH09158783A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6302384B1 (en) 2000-06-01 2001-10-16 Walbro Corporation Needle valve carburetor
US6454246B1 (en) * 2000-11-17 2002-09-24 Walbro Corporation Carburetor with separate nozzle post member
US6540212B2 (en) * 2000-03-29 2003-04-01 Walbro Corporation Carburetor valve rotational setting retainer assembly
EP1380747A2 (en) 2002-07-11 2004-01-14 Walbro Engine Management, L.L.C. Carburetor air-fuel mixture adjustment assembly
US7070173B2 (en) 2002-07-11 2006-07-04 Walbro Engine Management, L.L.C. Carburetor air-fuel mixture adjustment assembly
CN107061051A (en) * 2015-11-06 2017-08-18 沃尔布罗有限责任公司 Carburetor air fuel mixture adjusting part and instrument
US11118536B2 (en) 2018-12-17 2021-09-14 Walbro Llc Tamper resistant adjustment valve for a charge forming device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6540212B2 (en) * 2000-03-29 2003-04-01 Walbro Corporation Carburetor valve rotational setting retainer assembly
US6302384B1 (en) 2000-06-01 2001-10-16 Walbro Corporation Needle valve carburetor
US6454246B1 (en) * 2000-11-17 2002-09-24 Walbro Corporation Carburetor with separate nozzle post member
EP1380747A2 (en) 2002-07-11 2004-01-14 Walbro Engine Management, L.L.C. Carburetor air-fuel mixture adjustment assembly
US7070173B2 (en) 2002-07-11 2006-07-04 Walbro Engine Management, L.L.C. Carburetor air-fuel mixture adjustment assembly
CN107061051A (en) * 2015-11-06 2017-08-18 沃尔布罗有限责任公司 Carburetor air fuel mixture adjusting part and instrument
US11118536B2 (en) 2018-12-17 2021-09-14 Walbro Llc Tamper resistant adjustment valve for a charge forming device

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