JPS6215742B2 - - Google Patents
Info
- Publication number
- JPS6215742B2 JPS6215742B2 JP20159182A JP20159182A JPS6215742B2 JP S6215742 B2 JPS6215742 B2 JP S6215742B2 JP 20159182 A JP20159182 A JP 20159182A JP 20159182 A JP20159182 A JP 20159182A JP S6215742 B2 JPS6215742 B2 JP S6215742B2
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- valve
- governor
- point
- throttle lever
- 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
- 238000013459 approach Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
【発明の詳細な説明】
本発明は、負圧作動器の作動力とガバナスプリ
ングの張力との釣合により、スロツトル弁の開量
を調節して、エンジンの負荷変動に拘わらずその
回転速度を一定に保つようにした空気式ガバナ装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention adjusts the opening amount of the throttle valve by balancing the operating force of the negative pressure actuator and the tension of the governor spring to maintain the rotational speed of the engine regardless of load fluctuations. This invention relates to a pneumatic governor device that maintains a constant state.
空気式ガバナ装置の基本構造は、スロツトル弁
の風下側の吸気路の吸気負圧で負圧作動器を作動
させ、この負圧作動力とガバナスプリングの張力
とを釣合せるようにしている。 The basic structure of the pneumatic governor device is to operate a negative pressure actuator using the intake negative pressure in the intake passage on the leeward side of the throttle valve, and to balance this negative pressure operating force with the tension of the governor spring.
そして、スロツトル弁の開閉角度に対する開弁
面積が、第２図Ｂで示すように余弦曲績状Ｚに変
化するため、吸気負圧が正弦曲線状になり、負圧
作動器６の閉弁出力も第２図Ａに示す正弦曲線状
Ｙになる。 Since the opening area of the throttle valve relative to the opening/closing angle changes in a cosine curve Z as shown in FIG. 2B, the intake negative pressure becomes a sine curve, and the valve closing output of the negative pressure actuator 6 It also becomes a sinusoidal curve Y shown in FIG. 2A.
ところが、従来ではガバナスプリングが第１図
中に仮想線７′で示すように、スロツトルレバー
５の揺動角度の中立点２１から接線方向に導出さ
せていたので、スロツトル弁の閉弁角度に対する
ガバナスプリング７′の開弁用張力が第２図Ａに
示すように略直線状Ｘに変化する。このため、エ
ンジンの軽負荷運転時に、スロツトル弁４の開弁
角度が小さくなると、負圧作動器６の閉弁用出力
よりもガバナスプリング７′の開弁用張力が強く
なつてきて、スロツトル弁４を開き側に偏らせて
しまうので、エンジンの回転速度が上つてしまう
問題がある。 However, in the past, the governor spring was drawn out in a tangential direction from the neutral point 21 of the swing angle of the throttle lever 5, as shown by the imaginary line 7' in FIG. The valve opening tension of the governor spring 7' changes in a substantially straight line X as shown in FIG. 2A. Therefore, when the opening angle of the throttle valve 4 becomes small during light load operation of the engine, the valve opening tension of the governor spring 7' becomes stronger than the valve closing output of the negative pressure actuator 6, and the throttle valve opens. 4 is biased towards the opening side, there is a problem in that the engine rotational speed increases.
本発明は、上記問題を解決するために提案され
たもので、エンジンの軽負荷運転でスロツトル弁
が全閉側に揺動して、負圧作動器の出力増加率が
減少するときに、ガバナスプリングの伸び率を小
さくすることにより、ガバナスプリングの張力の
増大率を負圧作動室余弦曲線状の負圧増大率に合
わせるようにするものである。 The present invention was proposed to solve the above problem, and when the throttle valve swings to the fully closed side during light load operation of the engine and the output increase rate of the negative pressure actuator decreases, the governor By reducing the elongation rate of the spring, the rate of increase in tension of the governor spring is made to match the rate of increase in negative pressure of the cosine curve of the negative pressure working chamber.
以下、本発明の実施例を図面に基き説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は、気化器式エンジンの空気式ガバナの
構造を示す概略正面図である。 FIG. 1 is a schematic front view showing the structure of a pneumatic governor for a carburetor engine.
この空気式ガバナＧは、エンジン（図外）の吸
気管１に気化器２及びエアクリーナ３を順に取付
け、気化器２のスロツトル弁４を操作するスロツ
トルレバー５に吸気負圧で作動する負圧作動器６
と、これに対抗する力を発生するガバナスプリン
グ７とを設けてある。 In this pneumatic governor G, a carburetor 2 and an air cleaner 3 are sequentially attached to an intake pipe 1 of an engine (not shown), and a throttle lever 5 that operates a throttle valve 4 of the carburetor 2 is operated by negative intake pressure. Actuator 6
and a governor spring 7 that generates a force to counteract this force.
負圧作動器６は、スロツトル弁４より下流側の
吸気路８の負圧を負圧作動器の作動室９に導入管
１０で導入し、作動室９のダイヤグラム１１を復
帰バネ１２に抗して吸引し、操作腕１３を介して
スロツトル弁４が閉弁するようにスロツトルレバ
ー５を閉弁側１４に操作する。 The negative pressure actuator 6 introduces the negative pressure in the intake passage 8 on the downstream side of the throttle valve 4 into the working chamber 9 of the negative pressure actuator through an introduction pipe 10, and causes the diagram 11 of the working chamber 9 to resist the return spring 12. The throttle lever 5 is operated to the valve-closing side 14 via the operating arm 13 so that the throttle valve 4 is closed.
そして、負圧作動器６の操作腕１３に対抗し、
スロツトルレバー５を開弁側１５に引張るガバナ
スプリング７は、その張力を調整し、エンジンの
回転を設定する速度調整レバー１６の揺動腕１６
ａに基端部７ａが取付けてある。 Then, against the operating arm 13 of the negative pressure actuator 6,
The governor spring 7 that pulls the throttle lever 5 toward the opening side 15 adjusts its tension, and the swinging arm 16 of the speed adjustment lever 16 sets the rotation of the engine.
A base end portion 7a is attached to a.
速度調整レバー１６の揺動腕１６ａに取付けた
ガバナスプリング７の揺動軌跡１７は次に述べる
領域Ａ内を揺動するようになつている。 A swing locus 17 of the governor spring 7 attached to the swing arm 16a of the speed adjustment lever 16 swings within a region A described below.
この領域設定は、先ず、スロツトルレバー５の
揺動軌跡１８上における弁全開地点１９と弁全閉
地点２０との間の中点２１から弁全開地点１９を
通る仮想第１直線L1を引くとともに、弁全閉地
点２０からスロツトルレバー５の揺動中心点２２
を通る仮想第２直線L2を引く。 To set this area, first, draw a virtual first straight line L1 passing through the valve fully open point 19 from the midpoint 21 between the valve fully open point 19 and the valve fully closed point 20 on the rocking trajectory 18 of the throttle lever 5. At the same time, from the valve fully closed point 20 to the swing center point 22 of the throttle lever 5
Draw a virtual second straight line L 2 that passes through .
次に、スロツトルレバー５の揺動中心点２２か
ら弁全開地点１９を通る第３直線L3を引き、仮
想第１直線L1と仮想第２直線L2との挾角θ内の
領域で、仮想第３直線L3よりも弁全閉地点２０
から遠ざかる側の領域がガバナスプリング７の基
端部７ａが設けられ、揺動する領域Ａとなる。 Next, a third straight line L3 is drawn from the swinging center point 22 of the throttle lever 5 through the valve fully open point 19, and the third straight line L3 is drawn in the area within the angle θ between the virtual first straight line L1 and the virtual second straight line L2 . , valve fully closed point 20 from virtual third straight line L 3
The region on the side farther away from the governor spring 7 is the region A in which the base end 7a of the governor spring 7 is provided and swings.
このように構成した空気式ガバナＧの作用を次
に述べる。 The operation of the pneumatic governor G constructed in this manner will be described below.
速度調整レバー１６を手動操作してエンジンの
回転を設定するべくガバナスプリング７の張力を
調整すると、この張力と吸気路８の負圧で作動す
る負圧作動器６の操作腕１３の操作力との釣合い
でスロツトル弁４を操作し、エンジンの回転数を
設定された回転数に保つようになる。 When the speed adjustment lever 16 is manually operated to adjust the tension of the governor spring 7 to set the engine rotation, this tension and the operating force of the operating arm 13 of the negative pressure actuator 6, which is operated by the negative pressure of the intake passage 8, are combined. The throttle valve 4 is operated in accordance with the balance, and the engine rotational speed is maintained at the set rotational speed.
そして、エンジン回転数が設定された回転数よ
りも高くなると、吸気路８内を流れる吸気量が多
くなり、負圧が上昇して負圧作動器６の操作腕１
３がスロツトルレバー５を閉弁側１４に引張り、
エンジンの回転数を低下させる。 When the engine speed becomes higher than the set speed, the amount of intake air flowing through the intake passage 8 increases, and the negative pressure rises, causing the operation arm 1 of the negative pressure actuator 6 to increase.
3 pulls the throttle lever 5 to the valve closing side 14,
Reduce engine speed.
こうして、スロツトルレバー５を閉弁側１４に
揺動するとき、吸気路８内の通路断面積は第２図
の一点鎖線Ｘで示すように閉弁してゆくにつれて
通路断面積の減少度合Ｚは第２図に示すように鈍
くなる。 In this way, when the throttle lever 5 is swung toward the valve-closing side 14, the passage cross-sectional area in the intake passage 8 decreases to a degree Z as the valve closes, as shown by the dashed line X in FIG. becomes dull as shown in Figure 2.
これに伴ない、吸気路８の負圧も負圧増大度合
が第２図Ｙで示すように閉弁側では鈍くなり負圧
作動器６の操作腕１３の操作力が、増大しようと
するガバナスプリング７の張力より弱くなつてス
ロツトル弁４を充分に閉弁できずガバナ性能に狂
いを生じようとする。 Along with this, the degree of increase in negative pressure in the intake passage 8 becomes slower on the valve closing side as shown in FIG. The tension becomes weaker than that of the spring 7, and the throttle valve 4 cannot be closed sufficiently, causing a disturbance in governor performance.
ところが、スロツトル弁４の閉弁角度αに対し
てガバナスプリング７の伸び量Ｓが弁全閉地点２
０に近づくほど小さくなるためガバナスプリング
７の張力の増大度合は鈍くなり、負圧作動器６を
作動させる吸気路８の負圧の増大度合と略一致す
るようになり、ガバナ性能が狂い出すことが防止
される。 However, the amount of expansion S of the governor spring 7 with respect to the valve closing angle α of the throttle valve 4 is at the valve fully closed point 2.
The closer it gets to 0, the smaller the tension becomes, so the degree of increase in the tension of the governor spring 7 slows down, and it almost matches the degree of increase in the negative pressure in the intake passage 8 that operates the negative pressure actuator 6, causing the governor performance to go out of order. is prevented.
尚、第３図に示すものは、別の実施例を示すも
ので、速度調整レバー１６を負圧作動器６にリン
ク２４からなる連動機構２３を介して連動連結
し、スロツトル弁４が全閉側１４に揺動して吸気
路８内の負圧増大度合が減少する時にはガバナス
プリング７の基端部７ａもスロツトルレバー５の
閉弁方向へ揺動し、ガバナスプリング７の張力増
大度合も減少するので、エンジンの低負荷運転時
のガバナ性能の狂い出しを防止する。 The one shown in FIG. 3 shows another embodiment, in which the speed adjustment lever 16 is interlocked and connected to the negative pressure actuator 6 via an interlocking mechanism 23 consisting of a link 24, and the throttle valve 4 is fully closed. When the governor spring 7 swings toward the side 14 and the degree of increase in negative pressure in the intake passage 8 decreases, the base end 7a of the governor spring 7 also swings in the valve closing direction of the throttle lever 5, and the degree of increase in the tension of the governor spring 7 also decreases. This prevents the governor performance from going out of whack when the engine is operating at low load.
本発明は、以上に述べたように、エンジンの軽
負荷運転時には空気式ガバナ装置のガバナスプリ
ングの伸び率を、スロツトル弁が全閉側に近づく
につれて小さくなるようにしてあるので、ガバナ
スプリングの張力の増大率を負圧作動器の作動力
の増大率に合致させることができる。 As described above, in the present invention, when the engine is operated under a light load, the elongation rate of the governor spring of the pneumatic governor device is made smaller as the throttle valve approaches the fully closed side, so that the tension of the governor spring is reduced. The rate of increase in the operating force of the negative pressure actuator can be matched to the rate of increase in the operating force of the negative pressure actuator.
これにより、従来例で述べたエンジンの軽負荷
時に負圧作動器の作動力よりガバナスプリングの
張力が強くなりスロツトル弁を開き側に偏らせて
エンジンの回転速度が上昇するという問題を確実
に防止できる。 This reliably prevents the problem mentioned in the conventional example where the tension of the governor spring is stronger than the operating force of the negative pressure actuator when the engine is under light load, causing the throttle valve to bias toward the opening side and increasing the engine speed. can.
しかも、本発明は、ガバナスプリングの伸び率
が負圧作動器の作動力の変化に合せ、スロツトル
レバーが全閉地点に近づくにつれて小さくなるよ
うにガバナスプリングを設けるだけの簡単な構造
で済み安価に実施することができる。 Furthermore, the present invention has a simple structure in which the governor spring is provided so that the elongation rate of the governor spring decreases as the throttle lever approaches the fully closed point in accordance with changes in the operating force of the negative pressure actuator, and is inexpensive. can be implemented.
図面は本発明の実施例を示し、第１図は気化器
式エンジンの空気式ガバナの構造を示す概略正面
図であり、第２図Ａはスロツトル弁の開弁角度に
対するガバナスプリングと負圧作動器の出力を示
し、第２図Ｂはスロツトル弁の開弁角度に対する
吸気路開口面積との関係を示すグラフ、第３図は
別の実施例を示す第１図相当図である。
２……気化器、４……スロツトル弁、５……ス
ロツトルレバー、６……負圧作動器、７……ガバ
ナスプリング、７ａ……７の基端部、８……吸気
路、９……６の負圧作動室、１４……閉弁側、１
５……開弁側、１８……５の揺動軌跡、１９……
弁全開地点、２０……弁全閉地点、２１……１
９，２０の中間地点、２２……５の揺動中心点、
２３……連動機構、Ａ……７ａの領域、L1……
仮想第１直線、L2……仮想第２直線、L3……仮
想第３直線、Ｓ……７の伸び量、θ……L1とL2
の挾角、α……５の開弁角度。
The drawings show an embodiment of the present invention, and FIG. 1 is a schematic front view showing the structure of a pneumatic governor for a carburetor engine, and FIG. 2A is a diagram showing the governor spring and negative pressure operation for the opening angle of the throttle valve. FIG. 2B is a graph showing the relationship between the opening angle of the throttle valve and the opening area of the intake passage, and FIG. 3 is a diagram corresponding to FIG. 1 showing another embodiment. 2... Carburetor, 4... Throttle valve, 5... Throttle lever, 6... Negative pressure actuator, 7... Governor spring, 7a... Base end of 7, 8... Intake path, 9... ...Negative pressure working chamber of 6, 14...Valve closing side, 1
5... Valve opening side, 18... Rocking locus of 5, 19...
Valve fully open point, 20... Valve fully closed point, 21...1
9, 20 intermediate point, 22...5 swing center point,
23...Interlocking mechanism, A...7a area, L 1 ...
Virtual first straight line, L 2 ... Virtual second straight line, L 3 ... Virtual third straight line, S... Amount of elongation of 7, θ... L 1 and L 2
The opening angle of α...5.
Claims (1)
に、ガバナスプリング７と負圧作動器６とを連動
連結し、負圧作動器６の負圧作動室９をスロツト
ル弁４から燃焼室に至る間の吸気路８に連通し、
スロツトル弁４をスロツトルレバー５を介して、
ガバナスプリング７で開弁側１５に、負圧作動器
６で閉弁側１４に駆動するように構成し、スロツ
トル弁４の単位閉弁角度当りに対するガバナスプ
リング７の伸び率を、スロツトルレバー５が全閉
地点２０に近づくほど小さくなるように設定した
事を特徴とする、気化器式エンジンの空気式ガバ
ナ装置。 ２ 特許請求の範囲第１項に記載した気化器式エ
ンジンの空気式ガバナ装置において、スロツトル
レバー５の揺動軌跡１８上における弁全開地点１
９と弁全閉地点２０との中点２１から弁全開地点
１９を通る仮想第１直線L1を引き、弁全閉地点
２０からスロツトルレバー５の揺動中心点２２を
通る仮想第２直線L2を引き、揺動中心点２２か
ら弁全開地点１９を通る仮想第３直線L3を引
き、仮想第１直線L1と仮想第２直線L2との挾角
θ内の領域で、仮想第３直線L3よりも弁全閉地
点２０から遠ざかる側の領域Ａ上にガバナスプリ
ング７の基端部７ａを位置させるようにしたも
の。 ３ 特許請求の範囲第１項に記載した気化器式エ
ンジンの空気式ガバナ装置において、ガバナスプ
リング７の基端部７ａを連動機構２３を介して負
圧作動器６に連動連結し、負圧作動器６がスロツ
トルレバー５を閉弁側１４に閉じるときにガバナ
スプリング７の基端部７ａを張力が緩む側に変位
させるようにしたもの。[Claims] 1. A throttle lever 5 of a carburetor 2 of an engine.
The governor spring 7 and the negative pressure actuator 6 are interlocked and connected, and the negative pressure actuating chamber 9 of the negative pressure actuator 6 is communicated with the intake passage 8 between the throttle valve 4 and the combustion chamber.
Throttle valve 4 via throttle lever 5,
The throttle lever 5 is configured to drive the governor spring 7 to the valve opening side 15 and the negative pressure actuator 6 to the valve closing side 14. A pneumatic governor device for a carburetor-type engine, characterized in that it is set to become smaller as it approaches a fully closed point 20. 2. In the pneumatic governor device for a carburetor engine described in claim 1, the valve fully open point 1 on the rocking locus 18 of the throttle lever 5
9 and the valve fully closed point 20, draw a virtual first straight line L1 passing through the valve fully open point 19, and draw a virtual second straight line L1 passing from the valve fully closed point 20 to the swinging center point 22 of the throttle lever 5. L 2 is drawn, a virtual third straight line L 3 is drawn from the swing center point 22 and passes through the valve fully open point 19 , and the virtual The base end 7a of the governor spring 7 is located on the region A on the side farther from the valve fully closed point 20 than the third straight line L3 . 3. In the pneumatic governor device for a carburetor engine as set forth in claim 1, the base end 7a of the governor spring 7 is interlocked and connected to the negative pressure actuator 6 via the interlocking mechanism 23, and the negative pressure actuator 6 is operated in a negative pressure manner. When the throttle lever 5 is closed to the valve closing side 14 by the device 6, the base end 7a of the governor spring 7 is displaced to the side where the tension is relaxed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20159182A JPS5990731A (en) | 1982-11-16 | 1982-11-16 | Pneumatic governor for carburetor type engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20159182A JPS5990731A (en) | 1982-11-16 | 1982-11-16 | Pneumatic governor for carburetor type engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5990731A JPS5990731A (en) | 1984-05-25 |
| JPS6215742B2 true JPS6215742B2 (en) | 1987-04-09 |
Family
ID=16443590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20159182A Granted JPS5990731A (en) | 1982-11-16 | 1982-11-16 | Pneumatic governor for carburetor type engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5990731A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020230879A1 (en) | 2019-05-15 | 2020-11-19 | 株式会社前川製作所 | Ice making machine |
-
1982
- 1982-11-16 JP JP20159182A patent/JPS5990731A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020230879A1 (en) | 2019-05-15 | 2020-11-19 | 株式会社前川製作所 | Ice making machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5990731A (en) | 1984-05-25 |
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