JPS5854257B2 - engine carburetor - Google Patents
engine carburetorInfo
- Publication number
- JPS5854257B2 JPS5854257B2 JP3481576A JP3481576A JPS5854257B2 JP S5854257 B2 JPS5854257 B2 JP S5854257B2 JP 3481576 A JP3481576 A JP 3481576A JP 3481576 A JP3481576 A JP 3481576A JP S5854257 B2 JPS5854257 B2 JP S5854257B2
- Authority
- JP
- Japan
- Prior art keywords
- idle
- adjustment screw
- passage
- idle fuel
- carburetor
- 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.)
- Expired
Links
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Description
【発明の詳細な説明】
本発明は、アイドリング時におけるアイドル燃料を調整
可能にしたエンジンの気化器に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine carburetor that allows adjustment of idle fuel during idling.
一般に、アイドル燃料の流量はアイドル調整ネジによっ
て調整されているが、アイドリング時においてアイドル
燃料の流量が最適量より多い場合でも少い場合でも排気
中の一酸化炭素量は増大するため、アイドル調整ネジを
適正な状態に維持するとともに、使用者のかつてな操作
、特に使用者による流量減少を意図した締め過ぎによる
一酸化炭素の発生増大を防止する必要がある。Generally, the flow rate of idle fuel is adjusted by the idle adjustment screw, but since the amount of carbon monoxide in the exhaust increases whether the idle fuel flow rate is higher or lower than the optimum amount during idling, the idle adjustment screw It is necessary to maintain the valve in an appropriate state and to prevent an increase in carbon monoxide generation due to previous user operations, especially over-tightening intended to reduce the flow rate.
従来、アイドル調整ネジの頭部にキャップを被せて、使
用者による調整を制限することが知られている。Conventionally, it has been known to put a cap on the head of an idle adjustment screw to restrict adjustment by the user.
（例えば、特公昭４７−４２４２４号）しかし、この従
来装置では、使用者がキャップを取り外した場合、容易
にアイドル調整ネジを操作されるという問題があった。(For example, Japanese Patent Publication No. 47-42424) However, this conventional device has a problem in that when the user removes the cap, the idle adjustment screw is easily manipulated.
本発明はかかる点に鑑みてなされたもので、使用者のか
つてな操７作によってアイドル調整ネジが締め込まれた
場合においても一酸化炭素の過多な発生を防止するため
に、アイドル調整ネジの最大締め込み時においても、設
定量のアイドル燃料が吸気系に供給されるようにしたエ
ンジンの気化器を提供するものである。The present invention has been made in view of this point, and is designed to prevent excessive generation of carbon monoxide even when the idle adjustment screw is tightened by a user's previous operation. To provide an engine carburetor in which a set amount of idle fuel is supplied to an intake system even when tightened to the maximum.
以下、本発明の構成を実施例について図面に基づいて説
明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.
第１図において、１はアイドル燃料の流量を調整するよ
うにした気化器本体、２は吸気通路、３゜４はアイドル
燃料通路、５は前記両アイドル燃料通路３，４間に設け
られた連通室、６は先端に針弁Ｉを有し、アイドル燃料
通路３，４に介設され、かつ、アイドル燃料通路４の面
積を可変とするアイドル調整ネジである。In FIG. 1, 1 is a carburetor body adapted to adjust the flow rate of idle fuel, 2 is an intake passage, 3°4 is an idle fuel passage, and 5 is a communication provided between the two idle fuel passages 3 and 4. A chamber 6 is an idle adjustment screw having a needle valve I at its tip, interposed between the idle fuel passages 3 and 4, and making the area of the idle fuel passage 4 variable.
アイドル調整ネジ６の最大締込時に、設定量のアイドル
燃料の通過を許容する通路面積を保持するストッパであ
るストップリング８がアイドル調整ネジ６の頭部６ａと
気化器本体１との間に設けられ、該ストップリング８は
円筒状であり、一端面は開口し、かつ、アイドル調整ネ
ジ６の頭部６ａに当接可能な当接面８ａを有し、他端面
はアイドル調整ネジ６のネジ部６ｂが挿入可能な挿入口
８ｂを有し、針弁７とアイドル燃料通路４の連通室５側
の開口部との間隔りが、頭部６ａと当接部８ａとの間隔
ｌよりも犬なるよう設定され、該ストップリング８とア
イドル調整ネジ６の頭部６ａとの間にスプリング９が介
装されている。A stop ring 8, which is a stopper, is provided between the head 6a of the idle adjustment screw 6 and the carburetor body 1 to maintain a passage area that allows passage of a set amount of idle fuel when the idle adjustment screw 6 is tightened to the maximum. The stop ring 8 has a cylindrical shape, has an open end surface, and has an abutment surface 8a that can come into contact with the head 6a of the idle adjustment screw 6, and the other end surface contacts the screw of the idle adjustment screw 6. The part 6b has an insertion opening 8b into which the part 6b can be inserted, and the distance between the needle valve 7 and the opening on the communication chamber 5 side of the idle fuel passage 4 is smaller than the distance l between the head 6a and the contact part 8a. A spring 9 is interposed between the stop ring 8 and the head 6a of the idle adjustment screw 6.
従って、アイドル調整ネジ６を締め込むと頭部６ａがス
トップリング８に当接し、それ以上アイドル調整ネジ６
は締め込まれない為、針弁１においてはアイドル燃料通
路４の連通室５側の開口部面積を予め設定したアイドル
燃料流量の通過を許容する面積に保持し、それ以上面積
を小さくしない。Therefore, when the idle adjustment screw 6 is tightened, the head 6a comes into contact with the stop ring 8, and the idle adjustment screw 6
is not tightened, so in the needle valve 1, the area of the opening of the idle fuel passage 4 on the side of the communication chamber 5 is maintained at an area that allows passage of a preset idle fuel flow rate, and the area is not reduced any further.
尚、アイドリング状態において、アイドル燃料流量の最
大量を規制する際は、アイドル調整ネジ６の最大弛緩時
に針弁７の先端に突設さした突出部７ａがアイドル燃料
通路４内に、該アイドル燃料通路４涌積を制限する状態
で介在するよう設ければよい。In addition, when regulating the maximum amount of idle fuel flow rate in the idling state, when the idle adjustment screw 6 is relaxed to the maximum, the protrusion 7a protruding from the tip of the needle valve 7 causes the idle fuel to flow into the idle fuel passage 4. It may be provided so as to be interposed so as to limit the volume of the four passages.
以上のように、本発明は、アイドル調整ネジによってア
イドル燃料の流量を調整するようにした気化器において
、前記アイドル調整ネジの最大締込時においても、設定
量のアイドル燃料が吸気系に供給されるため、簡単な構
造でもってアイドル調整ネジの締め過ぎによる一酸化炭
素の発生を防止することができる。As described above, the present invention provides a carburetor in which the flow rate of idle fuel is adjusted by an idle adjustment screw, in which a set amount of idle fuel is supplied to the intake system even when the idle adjustment screw is tightened to the maximum. Therefore, the generation of carbon monoxide due to over-tightening of the idle adjustment screw can be prevented with a simple structure.
またアイドル調整ネジの移動量を規制する方式では、針
弁が気化器本体に当接しないため、アイドル調整ネジの
変形を防止できるから、正確なアイドル燃料の調整が長
期に亘って可能となる。Furthermore, in the system that restricts the amount of movement of the idle adjustment screw, the needle valve does not come into contact with the carburetor body, which prevents the idle adjustment screw from deforming, making it possible to accurately adjust the idle fuel over a long period of time.
第１図は本発明の実施例であるエンジンの気化器を示す
断面図である。
１・・・・・・気化器本体、２・・・・・・吸気通路、
３，４・・・・・・アイドル燃料通路、５・・・・・・
連通室、６，１０・・・・・・アイドル調整ネジ、６ａ
、１０ａ・・・・・・法倍臥６ｂ、１０ｂ・・・・・・
ネジ部、Ｉ・・・・・・針弁、７ａ・・・・・・突出部
、８・・・・・・ストップリング、８ａ・・・・・・当
接部、８ｂ・・・・・・挿入口、９・・・・・・スプリ
ング。FIG. 1 is a sectional view showing a carburetor of an engine according to an embodiment of the present invention. 1... Carburetor body, 2... Intake passage,
3, 4... Idle fuel passage, 5...
Communication chamber, 6, 10...Idle adjustment screw, 6a
, 10a... Houbenwa 6b, 10b...
Threaded part, I...Needle valve, 7a...Protruding part, 8...Stop ring, 8a...Abutting part, 8b...・Insertion port, 9...Spring.
Claims (1)
よって前記アイドル燃料通路面積を可変としアイドル燃
料の流量を調整するようにした気化器において、前記ア
イドル調整ネジの頭部と気化器本体との間に該アイドル
調整ネジの最大締込時に設定量のアイドル燃料の通過を
許容する通路面積を保持するストッパを設けたことを特
徴とするエンジンの気化器。1. In a carburetor in which the area of the idle fuel passage is variable and the flow rate of the idle fuel is adjusted by an idle adjustment screw interposed in the idle fuel passage, there is a space between the head of the idle adjustment screw and the carburetor body. A carburetor for an engine, characterized in that a stopper is provided for maintaining a passage area that allows passage of a set amount of idle fuel when the idle adjustment screw is fully tightened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3481576A JPS5854257B2 (en) | 1976-03-29 | 1976-03-29 | engine carburetor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3481576A JPS5854257B2 (en) | 1976-03-29 | 1976-03-29 | engine carburetor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52118134A JPS52118134A (en) | 1977-10-04 |
| JPS5854257B2 true JPS5854257B2 (en) | 1983-12-03 |
Family
ID=12424695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3481576A Expired JPS5854257B2 (en) | 1976-03-29 | 1976-03-29 | engine carburetor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5854257B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03123967U (en) * | 1990-03-29 | 1991-12-17 |
-
1976
- 1976-03-29 JP JP3481576A patent/JPS5854257B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52118134A (en) | 1977-10-04 |
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